1
|
Birkner T, Siegels D, Heinrich L, Haufe E, Abraham S, Heratizadeh A, Harder I, Bell M, Fell I, Worm M, Handrick C, Effendy I, Asmussen A, Kleinheinz A, Homey B, Sticherling M, Hong-Weldemann SH, Augustin M, Weisshaar E, Schäkel K, Schaefer T, Schwarz B, Wiemers F, Brücher JJ, Quist S, Wollenberg A, Biedermann T, Ertner K, von Kiedrowski R, Werfel T, Weidinger S, Schmitt J. Itch, sleep loss, depressive symptoms, fatigue, and productivity loss in patients with moderate-to-severe atopic dermatitis: Analyses of TREATgermany registry data. J Dtsch Dermatol Ges 2023; 21:1157-1168. [PMID: 37485573 DOI: 10.1111/ddg.15159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 05/28/2023] [Indexed: 07/25/2023]
Abstract
BACKGROUND TREATgermany is a multicenter registry including patients with moderate-to-severe atopic dermatitis (AD) from currently 74 study centers (university clinics, hospitals and practices) in Germany. As of August 31, 2021, 1,230 adult patients were enrolled. METHODS In TREATgermany, patients and physicians fill in questionnaires pertaining to symptoms, disease severity, quality of life, depressiveness, and fatigue. In particular, limitations in work performance are assessed using the Work Limitations Questionnaire (WLQ). To assess associations between occupational performance/work limitations and symptoms, correlations and regression models were calculated. RESULTS The examined sample of 228 employed patients reported an average of 6% at-work productivity loss within the past two weeks prior to enrolment in the registry. The WLQ productivity loss score was moderately associated with itch (r = 0.32) and sleep loss (r = 0.39) and strongly associated with depressive symptoms (r = 0.68) and fatigue (r = 0.60). CONCLUSIONS The analyses of the registry data show that moderate-to-severe atopic dermatitis has a negative impact on the work productivity of the patients. The analyses further point out the relevant associations between work productivity, depressive symptoms, and fatigue highlighting the disease burden caused by the psychological components of AD.
Collapse
Affiliation(s)
- Thomas Birkner
- Center of Evidence-Based Healthcare, University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Doreen Siegels
- Center of Evidence-Based Healthcare, University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Luise Heinrich
- Center of Evidence-Based Healthcare, University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Eva Haufe
- Center of Evidence-Based Healthcare, University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Susanne Abraham
- Department of Dermatology, University Allergy Center, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Annice Heratizadeh
- Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - Inken Harder
- Center for Inflammatory Skin Diseases, Department of Dermatology and Allergy, University Hospital Schleswig-Holstein Campus Kiel, Kiel, Germany
| | - Magnus Bell
- Practice Dr. med. Magnus Bell, Andernach, Germany
| | - Isabell Fell
- Hautmedizin Bad Soden Studienzentrum, Bad Soden, Germany
| | - Margitta Worm
- Department of Dermatology, Allergy and Venereology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | | | - Isaak Effendy
- Department of Dermatology, OWL University Hospital of Bielefeld University, Campus Clinic Bielefeld, Bielefeld, Germany
| | - Andrea Asmussen
- Practice Dr. med. Andrea Asmussen, Dermatology at Lesum, Bremen, Germany
| | | | - Bernhard Homey
- Department of Dermatology and Allergology, University Hospital Duesseldorf, Düsseldorf, Germany
| | - Michael Sticherling
- Department of Dermatology, University, German Center for Immunotherapy, Erlangen, Germany
| | | | - Matthias Augustin
- Institute for Health Services Research in Dermatology Hamburg, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Elke Weisshaar
- Division of Occupational Dermatology, Department of Dermatology, Ruprecht-Karls University, Heidelberg, Germany
| | - Knut Schäkel
- Department of Dermatology, University Hospital, Heidelberg, Germany
| | - Thomas Schaefer
- Practice Dr. med. Thomas Schaefer/ Dr. med. Doreen Belz, Derma Koeln, Köln, Germany
| | | | | | - Jens-Joachim Brücher
- Practice Dr. med. Jens-Joachim Brücher, Hautambulatorium Magdeburg, Magdeburg, Germany
| | - Sven Quist
- Dermatology Clinic, Helix Medical Excellence Center Mainz, Mainz, Germany
| | - Andreas Wollenberg
- Clinics and Outpatient Clinics for Dermatology and Allergy, LMU Munich, München, Germany and Vrije Universiteit Brussel, Universitair Ziekenhuis, Department of Dermatology, Brussels, Belgium
| | - Tilo Biedermann
- Department of Dermatology and Allergy, School of Medicine, Technical University of Munich, München, Germany
| | | | - Ralph von Kiedrowski
- Focus Practice for chronic inflammatory dermatoses, skin cancer and allergology and also Study Center CMS3 (Company for Medical Study and Service), Selters/Westerwald, Germany
| | - Thomas Werfel
- Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - Stephan Weidinger
- Center for Inflammatory Skin Diseases, Department of Dermatology and Allergy, University Hospital Schleswig-Holstein Campus Kiel, Kiel, Germany
| | - Jochen Schmitt
- Center of Evidence-Based Healthcare, University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| |
Collapse
|
2
|
Birkner T, Siegels D, Heinrich L, Haufe E, Abraham S, Heratizadeh A, Harder I, Bell M, Fell I, Worm M, Handrick C, Effendy I, Asmussen A, Kleinheinz A, Homey B, Sticherling M, Hong-Weldemann SH, Augustin M, Weisshaar E, Schäkel K, Schaefer T, Schwarz B, Wiemers F, Brücher JJ, Quist S, Wollenberg A, Biedermann T, Ertner K, von Kiedrowski R, Werfel T, Weidinger S, Schmitt J. Juckreiz, Schlafstörungen, depressive Symptome, Fatigue und Einschränkungen der Arbeitsproduktivität bei Patienten mit moderater bis schwerer atopischer Dermatitis: Daten aus dem TREATgermany-Register. J Dtsch Dermatol Ges 2023; 21:1157-1169. [PMID: 37845075 DOI: 10.1111/ddg.15159_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 05/28/2023] [Indexed: 10/18/2023]
Abstract
ZusammenfassungHintergrundTREATgermany ist ein multizentrisches Register, das Patienten mit moderater bis schwerer atopischer Dermatitis (AD) aus derzeit 74 Studienzentren (Universitätskliniken, Krankenhäuser und Praxen) in Deutschland umfasst. Bis zum 31. August 2021 wurden 1.230 erwachsene Patienten eingeschlossen.MethodenIn TREATgermany füllen Patienten und Ärzte Fragebögen zu Symptomen, Krankheitsschwere, Lebensqualität, Depressivität und Fatigue aus. Die Einschränkungen der Arbeitsleistung werden insbesondere mit dem Work Limitations Questionnaire (WLQ) erfasst. Um Assoziationen zwischen beruflicher Leistung/Arbeitseinschränkungen und Symptomen zu bestimmen, wurden Korrelationen und Regressionsmodelle berechnet.ErgebnisseDie untersuchte Stichprobe von 228 berufstätigen Patienten beschrieb einen durchschnittlichen Produktivitätsverlust von 6% bei der Arbeit innerhalb der letzten zwei Wochen vor der Aufnahme in das Register. Der WLQ‐Wert für den Produktivitätsverlust war moderat mit Juckreiz (r = 0,32) und Schlafstörungen (r = 0,39) und stark mit depressiven Symptomen (r = 0,68) und Fatigue (r = 0,60) korreliert.SchlussfolgerungenDie Analysen der Registerdaten zeigen, dass eine moderate bis schwere AD einen negativen Einfluss auf die Arbeitsproduktivität der Patienten hat. Die Analysen weisen außerdem auf die relevanten Zusammenhänge zwischen Arbeitsproduktivität, depressiven Symptomen und Fatigue hin, was die durch die psychologischen Komponenten der AD verursachte Krankheitslast verdeutlicht.
Collapse
Affiliation(s)
- Thomas Birkner
- Zentrum für Evidenzbasierte Gesundheitsversorgung, Universitätsklinikum und Medizinische Fakultät Carl Gustav Carus an der Technischen Universität Dresden
| | - Doreen Siegels
- Zentrum für Evidenzbasierte Gesundheitsversorgung, Universitätsklinikum und Medizinische Fakultät Carl Gustav Carus an der Technischen Universität Dresden
| | - Luise Heinrich
- Zentrum für Evidenzbasierte Gesundheitsversorgung, Universitätsklinikum und Medizinische Fakultät Carl Gustav Carus an der Technischen Universität Dresden
| | - Eva Haufe
- Zentrum für Evidenzbasierte Gesundheitsversorgung, Universitätsklinikum und Medizinische Fakultät Carl Gustav Carus an der Technischen Universität Dresden
| | - Susanne Abraham
- Klinik und Poliklinik für Dermatologie, Universitätsklinikum und Medizinische Fakultät Carl Gustav Carus an der Technischen Universität Dresden
| | - Annice Heratizadeh
- Klinik für Dermatologie, Allergologie und Venerologie, Medizinische Hochschule Hannover
| | - Inken Harder
- Klinik für Dermatologie, Venerologie und Allergologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | | | | | - Margitta Worm
- Klinik für Dermatologie, Venerologie und Allergologie am Campus Mitte (CCM), Charité - Universitätsmedizin Berlin
| | | | - Isaak Effendy
- Hautklinik, Universitätsklinikum OWL der Universität Bielefeld, Campus Klinikum Bielefeld
| | - Andrea Asmussen
- Praxis Dr. med. Andrea Asmussen, Dermatologie an der Lesum, Bremen
| | - Andreas Kleinheinz
- Klinik für Dermatologie, Allergologische Ambulanz, Elbe Klinikum Buxtehude
| | - Bernhard Homey
- Klinik für Dermatologie, Universitätsklinikum Düsseldorf
| | | | | | - Matthias Augustin
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen, Universitätsklinikum Hamburg-Eppendorf, Hamburg
| | - Elke Weisshaar
- Berufsdermatologie, Hautklinik, Universitätsklinikum Heidelberg
| | - Knut Schäkel
- Universitäts-Hautklinik, Universitätsklinikum Heidelberg
| | - Thomas Schaefer
- Praxis Dr. med. Thomas Schaefer/ Dr. med. Doreen Belz, Derma Köln
| | - Beate Schwarz
- Praxis Dr. med. Beate Schwarz, Dermatologie und Allergologie, Langenau
| | | | | | - Sven Quist
- Dermatologische Klinik, Helix Medical Excellence Center, Mainz
| | - Andreas Wollenberg
- Klinik und Poliklinik für Dermatologie und Allergologie, LMU München und Hautklinik, Vrije Universiteit Brussel, Universitair Ziekenhuis, Brüssel, Belgien
| | - Tilo Biedermann
- Klinik für Dermatologie und Allergologie, Klinikum rechts der Isar, Technischen Universität München
| | | | - Ralph von Kiedrowski
- Spezialpraxis für chronisch-entzündliche Dermatosen, Hautkrebs und Allergologie/Berufsdermatologie und Studienzentrums CMS3 (Company for Medical Study and Service), Selters/Westerwald
| | - Thomas Werfel
- Klinik für Dermatologie, Allergologie und Venerologie, Medizinische Hochschule Hannover
| | - Stephan Weidinger
- Klinik für Dermatologie, Venerologie und Allergologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | - Jochen Schmitt
- Zentrum für Evidenzbasierte Gesundheitsversorgung, Universitätsklinikum und Medizinische Fakultät Carl Gustav Carus an der Technischen Universität Dresden
| |
Collapse
|
3
|
Mekic M, Schaefer T, Hoffmann EH, Aiyuk MBE, Tilgner A, Herrmann H. Temperature-Dependent Oxidation of Hydroxylated Aldehydes by •OH, SO 4•-, and NO 3• Radicals in the Atmospheric Aqueous Phase. J Phys Chem A 2023; 127:6495-6508. [PMID: 37498295 DOI: 10.1021/acs.jpca.3c00700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
T-dependent aqueous-phase rate constants were determined for the oxidation of the hydroxy aldehydes, glyceraldehyde, glycolaldehyde, and lactaldehyde, by the hydroxyl radicals (•OH), the sulfate radicals (SO4•-), and the nitrate radicals (NO3•). The obtained Arrhenius expressions for the oxidation by the •OH radical are: k(T,GLYCERALDEHYDE+OH•) = (3.3 ± 0.1) × 1010 × exp((-960 ± 80 K)/T)/L mol-1 s-1, k(T,GLYCOLALDEHYDE+OH•) = (4.3 ± 0.1) × 1011 × exp((-1740 ± 50 K)/T)/L mol-1 s-1, k(T,LACTALDEHYDE+OH•) = (1.6 ± 0.1) × 1011 × exp((-1410 ± 180 K)/T)/L mol-1 s-1; for the SO4•- radical: k(T,GLYCERALDEHYDE+SO4•-) = (4.3 ± 0.1) × 109 × exp((-1400 ± 50 K)/T)/L mol-1 s-1, k(T,GLYCOLALDEHYDE+SO4•-) = (10.3 ± 0.3) × 109 × exp((-1730 ± 190 K)/T)/L mol-1 s-1, k(T,LACTALDEHYDE+SO4•-) = (2.2 ± 0.1) × 109 × exp((-1030 ± 230 K)/T)/L mol-1 s-1; and for the NO3• radical: k(T,GLYCERALDEHYDE+NO3•) = (3.4 ± 0.2) × 1011 × exp((-3470 ± 460 K)/T)/L mol-1 s-1, k(T,GLYCOLALDEHYDE+NO3•) = (7.8 ± 0.2) × 1011 × exp((-3820 ± 240 K)/T)/L mol-1 s-1, k(T,LACTALDEHYDE+NO3•) = (4.3 ± 0.2) × 1010 × exp((-2750 ± 340 K)/T)/L mol-1 s-1, respectively. Targeted simulations of multiphase chemistry reveal that the oxidation by OH radicals in cloud droplets is important under remote and wildfire influenced continental conditions due to enhanced partitioning. There, the modeled average aqueous •OH concentration is 2.6 × 10-14 and 1.8 × 10-14 mol L-1, whereas it is 7.9 × 10-14 and 3.5 × 10-14 mol L-1 under wet particle conditions. During cloud periods, the aqueous-phase reactions by •OH contribute to the oxidation of glycolaldehyde, lactaldehyde, and glyceraldehyde by about 35 and 29%, 3 and 3%, and 47 and 37%, respectively.
Collapse
Affiliation(s)
- Majda Mekic
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstraße 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstraße 15, 04318 Leipzig, Germany
| | - Erik H Hoffmann
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstraße 15, 04318 Leipzig, Germany
| | - Marvel B E Aiyuk
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstraße 15, 04318 Leipzig, Germany
| | - Andreas Tilgner
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstraße 15, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstraße 15, 04318 Leipzig, Germany
| |
Collapse
|
4
|
Dalton EZ, Hoffmann EH, Schaefer T, Tilgner A, Herrmann H, Raff JD. Daytime Atmospheric Halogen Cycling through Aqueous-Phase Oxygen Atom Chemistry. J Am Chem Soc 2023; 145:15652-15657. [PMID: 37462273 DOI: 10.1021/jacs.3c03112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Halogen atoms are important atmospheric oxidants that have unidentified daytime sources from photochemical halide oxidation in sea salt aerosols. Here, we show that the photolysis of nitrate in aqueous chloride solutions generates nitryl chloride (ClNO2) in addition to Cl2 and HOCl. Experimental and modeling evidence suggests that O(3P) formed in the minor photolysis channel from nitrate oxidizes chloride to Cl2 and HOCl, which reacts with nitrite to form ClNO2. This chemistry is different than currently accepted mechanisms involving chloride oxidation by OH and could shift our understanding of daytime halogen cycling in the lower atmosphere.
Collapse
Affiliation(s)
- Evan Z Dalton
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Erik H Hoffmann
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Andreas Tilgner
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Jonathan D Raff
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
- Paul H. O'Neill School of Public & Environmental Affairs, Indiana University, Bloomington, Indiana 47405, United States
| |
Collapse
|
5
|
Sarang K, Otto T, Gagan S, Rudzinski K, Schaefer T, Brüggemann M, Grgić I, Kubas A, Herrmann H, Szmigielski R. Aqueous-phase photo-oxidation of selected green leaf volatiles initiated by OH radicals: Products and atmospheric implications. Sci Total Environ 2023; 879:162622. [PMID: 36878296 DOI: 10.1016/j.scitotenv.2023.162622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 05/17/2023]
Abstract
C5- and C6- unsaturated oxygenated organic compounds emitted by plants under stress like cutting, freezing or drying, known as Green Leaf Volatiles (GLVs), may clear some of the existing uncertainties in secondary organic aerosol (SOA) budget. The transformations of GLVs are a potential source of SOA components through photo-oxidation processes occurring in the atmospheric aqueous phase. Here, we investigated the aqueous photo-oxidation products from three abundant GLVs (1-penten-3-ol, (Z)-2-hexen-1-ol, and (E)-2-hexen-1-al) induced by OH radicals, carried out in a photo-reactor under simulated solar conditions. The aqueous reaction samples were analyzed using advanced hyphenated mass spectrometry techniques: capillary gas chromatography mass spectrometry (c-GC-MS); and reversed-phase liquid chromatography high resolution mass spectrometry (LC-HRMS). Using carbonyl-targeted c-GC-MS analysis, we confirmed the presence of propionaldehyde, butyraldehyde, 1-penten-3-one, and 2-hexen-1-al in the reaction samples. The LC-HRMS analysis confirmed the presence of a new carbonyl product with the molecular formula C6H10O2, which probably bears the hydroxyhexenal or hydroxyhexenone structure. Density functional theory (DFT)-based quantum calculations were used to evaluate the experimental data and obtain insight into the formation mechanism and structures of the identified oxidation products via the addition and hydrogen-abstraction pathways. DFT calculations highlighted the importance of the hydrogen abstraction pathway leading to the new product C6H10O2. Atmospheric relevance of the identified products was evaluated using a set of physical property data like Henry's law constant (HLC) and vapor pressure (VP). The unknown product of molecular formula C6H10O2 has higher HLC and lower VP than the parent GLV and thus has potential to remain in the aqueous phase leading to possible aqueous SOA formation. Other observed carbonyl products are likely first stage oxidation products and precursors of aged SOA.
Collapse
Affiliation(s)
- Kumar Sarang
- Institute of Physical Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Tobias Otto
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany
| | - Sahir Gagan
- Institute of Physical Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Krzysztof Rudzinski
- Institute of Physical Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany
| | - Martin Brüggemann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany
| | - Irena Grgić
- Department of Analytical Chemistry, National Institute of Chemistry, SI-1000 Ljubljana, Slovenia
| | - Adam Kubas
- Institute of Physical Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland.
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany.
| | - Rafal Szmigielski
- Institute of Physical Chemistry Polish Academy of Sciences, 01-224 Warsaw, Poland.
| |
Collapse
|
6
|
Min N, Yao J, Li H, Chen Z, Pang W, Zhu J, Kümmel S, Schaefer T, Herrmann H, Richnow HH. Humic Substance Photosensitized Degradation of Phthalate Esters Characterized by 2H and 13C Isotope Fractionation. Environ Sci Technol 2023; 57:1930-1939. [PMID: 36689325 PMCID: PMC9910037 DOI: 10.1021/acs.est.2c06783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 01/06/2023] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
The photosensitized transformation of organic chemicals is an important degradation mechanism in natural surface waters, aerosols, and water films on surfaces. Dissolved organic matter including humic-like substances (HS), acting as photosensitizers that participate in electron transfer reactions, can generate a variety of reactive species, such as OH radicals and excited triplet-state HS (3HS*), which promote the degradation of organic compounds. We use phthalate esters, which are important contaminants found in wastewaters, landfills, soils, rivers, lakes, groundwaters, and mine tailings. We use phthalate esters as probes to study the reactivity of HS irradiated with artificial sunlight. Phthalate esters with different side-chain lengths were used as probes for elucidation of reaction mechanisms using 2H and 13C isotope fractionation. Reference experiments with the artificial photosensitizers 4,5,6,7-tetrachloro-2',4',5',7'-tetraiodofluorescein (Rose Bengal), 3-methoxy-acetophenone (3-MAP), and 4-methoxybenzaldehyde (4-MBA) yielded characteristic fractionation factors (-4 ± 1, -4 ± 2, and -4 ± 1‰ for 2H; 0.7 ± 0.2, 1.0 ± 0.4, and 0.8 ± 0.2‰ for 13C), allowing interpretation of reaction mechanisms of humic substances with phthalate esters. The correlation of 2H and 13C fractions can be used diagnostically to determine photosensitized reactions in the environment and to differentiate among biodegradation, hydrolysis, and photosensitized HS reaction.
Collapse
Affiliation(s)
- Ning Min
- School
of Water Resources and Environment and Research Center of Environmental
Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental
Science and Health, China University of
Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China
- Department
of Isotope Biogeochemistry, Helmholtz Centre
for Environmental Research − UFZ, Permoserstraße 15, Leipzig 04318, Germany
| | - Jun Yao
- School
of Water Resources and Environment and Research Center of Environmental
Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental
Science and Health, China University of
Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Hao Li
- School
of Water Resources and Environment and Research Center of Environmental
Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental
Science and Health, China University of
Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Zhihui Chen
- School
of Water Resources and Environment and Research Center of Environmental
Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental
Science and Health, China University of
Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Wancheng Pang
- School
of Water Resources and Environment and Research Center of Environmental
Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental
Science and Health, China University of
Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Junjie Zhu
- School
of Water Resources and Environment and Research Center of Environmental
Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental
Science and Health, China University of
Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Steffen Kümmel
- Department
of Isotope Biogeochemistry, Helmholtz Centre
for Environmental Research − UFZ, Permoserstraße 15, Leipzig 04318, Germany
| | - Thomas Schaefer
- Atmospheric
Chemistry Department (ACD), Leibniz Institute
for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Atmospheric
Chemistry Department (ACD), Leibniz Institute
for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Hans Hermann Richnow
- School
of Water Resources and Environment and Research Center of Environmental
Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental
Science and Health, China University of
Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China
- Department
of Isotope Biogeochemistry, Helmholtz Centre
for Environmental Research − UFZ, Permoserstraße 15, Leipzig 04318, Germany
- Isodetect
Leipzig GmbH, Deutscher
Platz 5b, Leipzig 04103, Germany
| |
Collapse
|
7
|
Aregahegn KZ, Felber T, Tilgner A, Hoffmann EH, Schaefer T, Herrmann H. Kinetics and Mechanisms of Aqueous-Phase Reactions of Triplet-State Imidazole-2-carboxaldehyde and 3,4-Dimethoxybenzaldehyde with α,β-Unsaturated Carbonyl Compounds. J Phys Chem A 2022; 126:8727-8740. [DOI: 10.1021/acs.jpca.2c05015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Kifle Z. Aregahegn
- Department of Chemistry, Debre Berhan University, P.O. Box 445, 1000 Debre Berhan, Ethiopia
| | - Tamara Felber
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Andreas Tilgner
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Erik H. Hoffmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| |
Collapse
|
8
|
Yang D, Schaefer T, Wen L, Herrmann H. Temperature- and pH- Dependent OH Radical Reaction Kinetics of Tartaric and Mucic Acids in the Aqueous Phase. J Phys Chem A 2022; 126:6244-6252. [PMID: 36057982 DOI: 10.1021/acs.jpca.2c03044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tartaric acid and mucic acid are dicarboxylic acids (DCAs), a substance class often found in atmospheric aerosols and cloud droplets. The hydroxyl radical (•OH)-induced oxidation in the aqueous phase is known to be an important loss process of organic compounds such as DCAs. However, the study of •OH kinetics of DCAs in the aqueous phase is still incomplete. In the present study, the rate constants of the •OH reactions of tartaric acid and mucic acid in the aqueous phase were determined by the thiocyanate competition kinetics method as a function of temperature and pH. The following T-dependent Arrhenius expressions (in units of L mol-1 s-1) were first derived for the •OH reactions with tartaric acid─k(T, H2A) = (3.3 ± 0.1) × 1010 exp[(-1350 ± 110 K)/T], k(T, HA-) = (3.6 ± 0.1) × 1010 exp[(-580 ± 110 K)/T], and k(T, A2-) = (3.3 ± 0.1) × 1010 exp[(-1190 ± 170 K)/T]─as well as mucic acid─k(T, H2A) = (2.2 ± 0.1) × 1010 exp[(-1140 ± 150 K)/T], k(T, HA-) = (4.8 ± 0.1) × 1010 exp[(-1280 ± 170 K)/T], and k(T, A2-) = (2.1 ± 0.1) × 1010 exp[(-970 ± 70 K)/T]. A general trend of the •OH rate constant is found as kA2- > kHA- > kH2A. The pH- and temperature-dependent rate constants of the OH radical reactions allow an accurate description of the source and sink processes in the tropospheric aqueous phase.
Collapse
Affiliation(s)
- Dong Yang
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.,Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, Leipzig 04318, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, Leipzig 04318, Germany
| | - Liang Wen
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, Leipzig 04318, Germany
| | - Hartmut Herrmann
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.,Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, Leipzig 04318, Germany
| |
Collapse
|
9
|
Wen L, Schaefer T, Zhang Y, He L, Ventura ON, Herrmann H. T- and pH-dependent OH radical reaction kinetics with glycine, alanine, serine, and threonine in the aqueous phase. Phys Chem Chem Phys 2022; 24:11054-11065. [PMID: 35471651 DOI: 10.1039/d1cp05186e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Glycine, alanine, serine, and threonine are essential amino acids originating from biological activities. These substances can be emitted into the atmosphere directly. In the present study, the aqueous phase reaction kinetics of hydroxyl radicals (˙OH) with the four amino acids is investigated using the competition kinetics method under controlled temperature and pH conditions. The following T-dependent Arrhenius expressions are derived for the ˙OH reactions with glycine, k(T, H2A+) = (9.1 ± 0.3) × 109 × exp[(-2360 ± 230 K)/T], k(T, HA±) = (1.3 ± 0.1) × 1010 × exp[(-2040 ± 240 K)/T]; alanine, k(T, H2A+) = (1.4 ± 0.1) × 109 × exp[(-1120 ± 320 K)/T], k(T, HA±) = (5.5 ± 0.2) × 109 × exp[(-1300 ± 200 K)/T]; serine, k(T, H2A+) = (1.1 ± 0.1) × 109 × exp[(-470 ± 150 K)/T], k(T, HA±) = (3.9 ± 0.1) × 109 × exp[(-720 ± 130 K)/T]; and threonine, k(T, H2A+) = (5.0 ± 0.1) × 1010 × exp[(-1500 ± 100 K)/T], k(T, HA±) = (3.3 ± 0.1) × 1010 × exp[(-1320 ± 90 K)/T] (in units of L mol-1 s-1). The energy barriers of the ˙OH-induced H atom abstractions were simulated by the density functional theory (DFT) calculation performed with GAUSSIAN using the method of M06-2X and the basis set of 6-311++G(3df,2p). According to the calculation results, the -COOH and -NH3+ groups with strong negative inductive effects increase the energy barriers and thus decrease the ˙OH reaction rate constants. In contrast, the presence of a -OH or -CH3 group with weak negative or positive inductive effects can reduce energy barriers and hence increase the ˙OH reaction rate constants. To improve the previous structure-activity relationship, the contribution factors of -NH3+ at Cα-atom and Cβ-atom are determined as 0.07 and 0.15, respectively. Aqueous phase ˙OH oxidation acts as an important sink of the amino acids in the atmosphere, and can be accurately described by the obtained Arrhenius expressions under atmospheric conditions.
Collapse
Affiliation(s)
- Liang Wen
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany.
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany.
| | - Yimu Zhang
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Lin He
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany.
| | - Oscar N Ventura
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany. .,Computational Chemistry and Biology Group, CCBG, DETEMA, Facultad de Química, Universidad de la República, 11400 Montevideo, Uruguay
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany. .,School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| |
Collapse
|
10
|
Sarang K, Otto T, Rudzinski K, Schaefer T, Grgić I, Nestorowicz K, Herrmann H, Szmigielski R. Reaction Kinetics of Green Leaf Volatiles with Sulfate, Hydroxyl, and Nitrate Radicals in Tropospheric Aqueous Phase. Environ Sci Technol 2021; 55:13666-13676. [PMID: 34583512 PMCID: PMC8529707 DOI: 10.1021/acs.est.1c03276] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 05/28/2023]
Abstract
Green plants exposed to abiotic or biotic stress release C-5 and C-6 unsaturated oxygenated hydrocarbons called Green Leaf Volatiles (GLVs). GLVs partition into tropospheric waters and react to form secondary organic aerosol (SOA). We explored the kinetics of aqueous-phase reactions of 1-penten-3-ol (PENTOL), (Z)-2-hexen-1-ol (HEXOL), and (E)-2-hexen-1-al (HEXAL) with SO4•-, •OH, and NO3•. At 298 K, the rate constants for reactions of PENTOL, HEXOL, and HEXAL with SO4•- were, respectively, (9.4 ± 1.0) × 108 L mol-1 s-1, (2.5 ± 0.3) × 109 L mol-1 s-1, and (4.8 ± 0.2) × 108 L mol-1 s-1; with •OH - (6.3 ± 0.1) × 109 L mol-1 s-1, (6.7 ± 0.3) × 109 L mol-1 s-1, and (4.8 ± 0.3) × 109 L mol-1 s-1; and with NO3• - (1.5 ± 0.15) × 108 L mol-1 s-1, (8.4 ± 2.3) × 108 L mol-1 s-1, and (3.0 ± 0.7) × 107 L mol-1 s-1. The rate constants increased weakly with temperatures ranging from 278 to 318 K. The diffusional limitations of the rate constants appeared significant only for the GLV-•OH reactions. The aqueous-phase reactions appeared negligible in deliquescent aerosol and haze water but not in clouds and rains. The atmospheric lifetimes of GLVs decreased from many days to hours with increasing liquid water content and radicals' concentration.
Collapse
Affiliation(s)
- Kumar Sarang
- Environmental
Chemistry Group, Institute of Physical Chemistry
Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Tobias Otto
- Atmospheric
Chemistry Department, Leibniz Institute
for Tropospheric Research, 04318, Leipzig, Germany
| | - Krzysztof Rudzinski
- Environmental
Chemistry Group, Institute of Physical Chemistry
Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Thomas Schaefer
- Atmospheric
Chemistry Department, Leibniz Institute
for Tropospheric Research, 04318, Leipzig, Germany
| | - Irena Grgić
- Department
of Analytical Chemistry, National Institute
of Chemistry, SI-1000, Ljubljana, Slovenia
| | - Klara Nestorowicz
- Environmental
Chemistry Group, Institute of Physical Chemistry
Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Hartmut Herrmann
- Atmospheric
Chemistry Department, Leibniz Institute
for Tropospheric Research, 04318, Leipzig, Germany
| | - Rafal Szmigielski
- Environmental
Chemistry Group, Institute of Physical Chemistry
Polish Academy of Sciences, 01-224 Warsaw, Poland
| |
Collapse
|
11
|
Tilgner A, Schaefer T, Alexander B, Barth M, Collett JL, Fahey KM, Nenes A, Pye HOT, Herrmann H, McNeill VF. Acidity and the multiphase chemistry of atmospheric aqueous particles and clouds. Atmos Chem Phys 2021; 21:10.5194/acp-21-13483-2021. [PMID: 34675968 PMCID: PMC8525431 DOI: 10.5194/acp-21-13483-2021] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The acidity of aqueous atmospheric solutions is a key parameter driving both the partitioning of semi-volatile acidic and basic trace gases and their aqueous-phase chemistry. In addition, the acidity of atmospheric aqueous phases, e.g., deliquesced aerosol particles, cloud, and fog droplets, is also dictated by aqueous-phase chemistry. These feedbacks between acidity and chemistry have crucial implications for the tropospheric lifetime of air pollutants, atmospheric composition, deposition to terrestrial and oceanic ecosystems, visibility, climate, and human health. Atmospheric research has made substantial progress in understanding feedbacks between acidity and multiphase chemistry during recent decades. This paper reviews the current state of knowledge on these feedbacks with a focus on aerosol and cloud systems, which involve both inorganic and organic aqueous-phase chemistry. Here, we describe the impacts of acidity on the phase partitioning of acidic and basic gases and buffering phenomena. Next, we review feedbacks of different acidity regimes on key chemical reaction mechanisms and kinetics, as well as uncertainties and chemical subsystems with incomplete information. Finally, we discuss atmospheric implications and highlight the need for future investigations, particularly with respect to reducing emissions of key acid precursors in a changing world, and the need for advancements in field and laboratory measurements and model tools.
Collapse
Affiliation(s)
- Andreas Tilgner
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Becky Alexander
- Department of Atmospheric Science, University of Washington, Seattle, WA 98195, USA
| | - Mary Barth
- Atmospheric Chemistry Observation & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO 80307, USA
| | - Jeffrey L. Collett
- Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, USA
| | - Kathleen M. Fahey
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27711, USA
| | - Athanasios Nenes
- School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
- Institute for Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras 26504, Greece
| | - Havala O. T. Pye
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27711, USA
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - V. Faye McNeill
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA
- Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, USA
| |
Collapse
|
12
|
Felber T, Schaefer T, He L, Herrmann H. Aromatic Carbonyl and Nitro Compounds as Photosensitizers and Their Photophysical Properties in the Tropospheric Aqueous Phase. J Phys Chem A 2021; 125:5078-5095. [PMID: 34096724 DOI: 10.1021/acs.jpca.1c03503] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Secondary organic aerosol formation in the atmospheric aqueous/particulate phase by photosensitized reactions is currently subject to uncertainties. To understand the impact of photosensitized reactions, photophysical and -chemical properties of photosensitizers, kinetic data, and reaction mechanisms of these processes are required. The photophysical properties of acetophenones, benzaldehydes, benzophenones, and naphthalenes were investigated in aqueous solution using laser flash excitation. Quantum yields of excited photosensitizers were determined giving values between 0.06-0.80 at 298 K and pH = 5. Molar absorption coefficients (εmax(3PS*) = (0.8-13) × 104 L mol-1 cm-1), decay rate constants in water (k1st = (9.4 ± 0.5) × 102 to (2.2 ± 0.1) × 105 s-1), and quenching rate constants with oxygen (kq(O2) = (1.7 ± 0.1-4.4 ± 0.4) × 109 L mol-1 s-1) of the excited triplet states were determined at 298 K and pH = 5. Photosensitized reactions of carboxylic acids and alkenes show second-order rate constants in the range of (37 ± 7.0-0.55 ± 0.1) × 104 and (27 ± 5.0-0.04 ± 0.01) × 108 L mol-1 s-1. The results show that different compound classes act differently as a photosensitizer and can be a sink for certain organic compounds in the atmospheric aqueous phase.
Collapse
Affiliation(s)
- Tamara Felber
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Lin He
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| |
Collapse
|
13
|
Ye C, Chen H, Hoffmann EH, Mettke P, Tilgner A, He L, Mutzel A, Brüggemann M, Poulain L, Schaefer T, Heinold B, Ma Z, Liu P, Xue C, Zhao X, Zhang C, Zhang F, Sun H, Li Q, Wang L, Yang X, Wang J, Liu C, Xing C, Mu Y, Chen J, Herrmann H. Particle-Phase Photoreactions of HULIS and TMIs Establish a Strong Source of H 2O 2 and Particulate Sulfate in the Winter North China Plain. Environ Sci Technol 2021; 55:7818-7830. [PMID: 34019409 DOI: 10.1021/acs.est.1c00561] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
During haze periods in the North China Plain, extremely high NO concentrations have been observed, commonly exceeding 1 ppbv, preventing the classical gas-phase H2O2 formation through HO2 recombination. Surprisingly, H2O2 mixing ratios of about 1 ppbv were observed repeatedly in winter 2017. Combined field observations and chamber experiments reveal a photochemical in-particle formation of H2O2, driven by transition metal ions (TMIs) and humic-like substances (HULIS). In chamber experiments, steady-state H2O2 mixing ratios of 116 ± 83 pptv were observed upon the irradiation of TMI- and HULIS-containing particles. Correspondingly, H2O2 formation rates of about 0.2 ppbv h-1 during the initial irradiation periods are consistent with the H2O2 rates observed in the field. A novel chemical mechanism was developed explaining the in-particle H2O2 formation through a sequence of elementary photochemical reactions involving HULIS and TMIs. Dedicated box model studies of measurement periods with relative humidity >50% and PM2.5 ≥ 75 μg m-3 agree with the observed H2O2 concentrations and time courses. The modeling results suggest about 90% of the particulate sulfate to be produced from the SO2 reaction with OH and HSO3- oxidation by H2O2. Overall, under high pollution, the H2O2-caused sulfate formation rate is above 250 ng m-3 h-1, contributing to the sulfate formation by more than 70%.
Collapse
Affiliation(s)
- Can Ye
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Chen
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
| | - Erik H Hoffmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Peter Mettke
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Andreas Tilgner
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Lin He
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Anke Mutzel
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Martin Brüggemann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Laurent Poulain
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Bernd Heinold
- Modeling of Atmospheric Processes Department, Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Zhuobiao Ma
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pengfei Liu
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chaoyang Xue
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoxi Zhao
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chenglong Zhang
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fei Zhang
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
| | - Hao Sun
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
| | - Qing Li
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
| | - Lin Wang
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
| | - Xin Yang
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
| | - Jinhe Wang
- School of Municipal and Environmental Engineering, Co-Innovation Centre for Green Building of Shandong Province, Shandong Jianzhu University, Jinan 250101, China
| | - Cheng Liu
- Centre for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Chengzhi Xing
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Yujing Mu
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Centre for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianmin Chen
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
- Centre for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Hartmut Herrmann
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| |
Collapse
|
14
|
Schaefer T. Quantum-limited sound attenuation. Science 2020; 370:1162-1163. [DOI: 10.1126/science.abb6155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Resonantly interacting atoms confined by lasers have implications for neutron stars
Collapse
Affiliation(s)
- Thomas Schaefer
- Department of Physics, North Carolina State University, Raleigh, NC 27695, USA
| |
Collapse
|
15
|
Felber T, Schaefer T, Herrmann H. Five-Membered Heterocycles as Potential Photosensitizers in the Tropospheric Aqueous Phase: Photophysical Properties of Imidazole-2-carboxaldehyde, 2-Furaldehyde, and 2-Acetylfuran. J Phys Chem A 2020; 124:10029-10039. [PMID: 33202138 DOI: 10.1021/acs.jpca.0c07028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photosensitized reactions of organic compounds in the atmospheric aqueous and particle phase might be potential sources for secondary organic aerosol (SOA) formation, addressed as aqueous SOA. However, data regarding the photophysical properties of photosensitizers, their kinetics, as well as reaction mechanisms of such processes in the aqueous/particle phase are scarce. The present study investigates the determination of the photophysical properties of imidazole-2-carboxaldehyde, 2-furaldehyde, and 2-acetylfuran as potential photosensitizers using laser flash excitation in aqueous solution. Quantum yields of the formation of the excited photosensitizers were obtained by a scavenging method with thiocyanate, resulting in values between 0.86 and 0.96 at 298 K and pH = 5. The time-resolved absorbance spectra of the excited photosensitizers were measured, and their molar attenuation coefficients were determined ranging between (0.30 and 1.4) × 104 L mol-1 cm-1 at their absorbance maxima (λmax = 335-440 nm). Additionally, the excited photosensitizers are quenched by water and molecular oxygen, resulting in quenching rate constants of k1st = (1.0 ± 0.2-1.8 ± 0.2) × 105 s-1 and kq(O2) = (2.1 ± 0.2-2.7 ± 0.2) × 109 L mol-1 s-1, respectively.
Collapse
Affiliation(s)
- Tamara Felber
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, 04318 Leipzig, Germany
| |
Collapse
|
16
|
Pye HOT, Nenes A, Alexander B, Ault AP, Barth MC, Clegg SL, Collett JL, Fahey KM, Hennigan CJ, Herrmann H, Kanakidou M, Kelly JT, Ku IT, McNeill VF, Riemer N, Schaefer T, Shi G, Tilgner A, Walker JT, Wang T, Weber R, Xing J, Zaveri RA, Zuend A. The Acidity of Atmospheric Particles and Clouds. Atmos Chem Phys 2020; 20:4809-4888. [PMID: 33424953 PMCID: PMC7791434 DOI: 10.5194/acp-20-4809-2020] [Citation(s) in RCA: 147] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Acidity, defined as pH, is a central component of aqueous chemistry. In the atmosphere, the acidity of condensed phases (aerosol particles, cloud water, and fog droplets) governs the phase partitioning of semi-volatile gases such as HNO3, NH3, HCl, and organic acids and bases as well as chemical reaction rates. It has implications for the atmospheric lifetime of pollutants, deposition, and human health. Despite its fundamental role in atmospheric processes, only recently has this field seen a growth in the number of studies on particle acidity. Even with this growth, many fine particle pH estimates must be based on thermodynamic model calculations since no operational techniques exist for direct measurements. Current information indicates acidic fine particles are ubiquitous, but observationally-constrained pH estimates are limited in spatial and temporal coverage. Clouds and fogs are also generally acidic, but to a lesser degree than particles, and have a range of pH that is quite sensitive to anthropogenic emissions of sulfur and nitrogen oxides, as well as ambient ammonia. Historical measurements indicate that cloud and fog droplet pH has changed in recent decades in response to controls on anthropogenic emissions, while the limited trend data for aerosol particles indicates acidity may be relatively constant due to the semi-volatile nature of the key acids and bases and buffering in particles. This paper reviews and synthesizes the current state of knowledge on the acidity of atmospheric condensed phases, specifically particles and cloud droplets. It includes recommendations for estimating acidity and pH, standard nomenclature, a synthesis of current pH estimates based on observations, and new model calculations on the local and global scale.
Collapse
Affiliation(s)
- Havala O. T. Pye
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Athanasios Nenes
- School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
- Institute for Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras, GR-26504, Greece
| | - Becky Alexander
- Department of Atmospheric Science, University of Washington, Seattle, WA, 98195, USA
| | - Andrew P. Ault
- Department of Chemistry, University of Michigan, Ann Arbor, MI, 48109-1055, USA
| | - Mary C. Barth
- National Center for Atmospheric Research, Boulder, CO, 80307, USA
| | - Simon L. Clegg
- School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK
| | - Jeffrey L. Collett
- Department of Atmospheric Science, Colorado State University, Fort Collins, CO, 80523, USA
| | - Kathleen M. Fahey
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Christopher J. Hennigan
- Department of Chemical, Biochemical, and Environmental Engineering, University of Maryland Baltimore County, Baltimore, MD, 21250, USA
| | - Hartmut Herrmann
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Leipzig, 04318, Germany
| | - Maria Kanakidou
- Department of Chemistry, University of Crete, Voutes, Heraklion Crete, 71003, Greece
| | - James T. Kelly
- Office of Air Quality Planning & Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - I-Ting Ku
- Department of Atmospheric Science, Colorado State University, Fort Collins, CO, 80523, USA
| | - V. Faye McNeill
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA
| | - Nicole Riemer
- Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana-Champaign, Illinois, 61801, USA
| | - Thomas Schaefer
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Leipzig, 04318, Germany
| | - Guoliang Shi
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, Nankai University, Tianjin, 300071, China
| | - Andreas Tilgner
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Leipzig, 04318, Germany
| | - John T. Walker
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Tao Wang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Rodney Weber
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Jia Xing
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Rahul A. Zaveri
- Atmospheric Sciences & Global Change Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Andreas Zuend
- Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, Quebec, H3A 0B9, Canada
| |
Collapse
|
17
|
Brüggemann M, Xu R, Tilgner A, Kwong KC, Mutzel A, Poon HY, Otto T, Schaefer T, Poulain L, Chan MN, Herrmann H. Organosulfates in Ambient Aerosol: State of Knowledge and Future Research Directions on Formation, Abundance, Fate, and Importance. Environ Sci Technol 2020; 54:3767-3782. [PMID: 32157872 DOI: 10.1021/acs.est.9b06751] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Organosulfates (OSs), also referred to as organic sulfate esters, are well-known and ubiquitous constituents of atmospheric aerosol particles. Commonly, they are assumed to form upon mixing of air masses of biogenic and anthropogenic origin, that is, through multiphase reactions between organic compounds and acidic sulfate particles. However, in contrast to this simplified picture, recent studies suggest that OSs may also originate from purely anthropogenic precursors or even directly from biomass and fossil fuel burning. Moreover, besides classical OS formation pathways, several alternative routes have been discovered, suggesting that OS formation possibly occurs through a wider variety of formation mechanisms in the atmosphere than initially expected. During the past decade, OSs have reached a constantly growing attention within the atmospheric science community with evermore studies reporting on large numbers of OS species in ambient aerosol. Nonetheless, estimates on OS concentrations and implications on atmospheric physicochemical processes are still connected to large uncertainties, calling for combined field, laboratory, and modeling studies. In this Critical Review, we summarize the current state of knowledge in atmospheric OS research, discuss unresolved questions, and outline future research needs, also in view of reductions of anthropogenic sulfur dioxide (SO2) emissions. Particularly, we focus on (1) field measurements of OSs and measurement techniques, (2) formation pathways of OSs and their atmospheric relevance, (3) transformation, reactivity, and fate of OSs in atmospheric particles, and (4) modeling efforts of OS formation and their global abundance.
Collapse
Affiliation(s)
- Martin Brüggemann
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Rongshuang Xu
- Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China
| | - Andreas Tilgner
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Kai Chung Kwong
- Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China
| | - Anke Mutzel
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Hon Yin Poon
- Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China
| | - Tobias Otto
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Laurent Poulain
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Man Nin Chan
- Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China
- The Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Hong Kong, China
| | - Hartmut Herrmann
- Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany
| |
Collapse
|
18
|
Kroflič A, Schaefer T, Huš M, Phuoc Le H, Otto T, Herrmann H. OH radicals reactivity towards phenol-related pollutants in water: temperature dependence of the rate constants and novel insights into the [OH-phenol]˙ adduct formation. Phys Chem Chem Phys 2020; 22:1324-1332. [PMID: 31850419 DOI: 10.1039/c9cp05533a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substituted phenols are known to readily react with the hydroxyl radical (OH˙), which is the most powerful atmospheric oxidant and is also most often used in advanced oxidation processes (AOP) for wastewater treatment. We report temperature-dependent (278.15-318.15 K) second order kinetic rate constants for the aqueous-phase reactions of OH˙ with phenol and four substituted phenols: catechol, phloroglucinol, pyrogallol and 3-methylcatechol, with the last two measured for the first time. The constructed Hammett plots for mono- and di-substituted phenols have the potential to be further applied for predicting the reaction rate constants of other substituted phenols at 298.15 K. This will significantly facilitate the optimization of AOP and improve the predictive capabilities of atmospheric multiphase models in the future. Moreover, an advancement in the understanding of the underlying mechanism, i.e. OH˙ addition to the aromatic ring is made by theoretical calculations at the M06-2X level. We demonstrate that the position of substituents on the aromatic ring is important for the [OH-phenol]˙ adduct formation, which is supported by the experiment and theoretical calculations. Adjacent and nonadjacent electron donor/acceptor substituents differently impact the interplay between the activation energy and entropy. We also show that explicit solvation has to be accounted for in theoretical models in order to explicitly describe the formation of the transition state.
Collapse
Affiliation(s)
- Ana Kroflič
- Leibniz-Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany. and National Institute of Chemistry, Department of Analytical Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Thomas Schaefer
- Leibniz-Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany.
| | - Matej Huš
- National Institute of Chemistry, Department of Catalysis and Chemical Reaction Engineering, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Hoa Phuoc Le
- Leibniz-Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany.
| | - Tobias Otto
- Leibniz-Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany.
| | - Hartmut Herrmann
- Leibniz-Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstrasse 15, 04318 Leipzig, Germany. and School of Environmental Science and Engineering, Shandong University, Binhairoad 72, 266237 Qingdao, China
| |
Collapse
|
19
|
Chaumont M, Tagliatti V, Channan EM, Colet JM, Bernard A, Morra S, Deprez G, Van Muylem A, Debbas N, Schaefer T, Faoro V, van de Borne P. Short halt in vaping modifies cardiorespiratory parameters and urine metabolome: a randomized trial. Am J Physiol Lung Cell Mol Physiol 2019; 318:L331-L344. [PMID: 31721596 PMCID: PMC7052663 DOI: 10.1152/ajplung.00268.2019] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Propylene glycol and glycerol are e-cigarette constituents that facilitate liquid vaporization and nicotine transport. As these small hydrophilic molecules quickly cross the lung epithelium, we hypothesized that short-term cessation of vaping in regular users would completely clear aerosol deposit from the lungs and reverse vaping-induced cardiorespiratory toxicity. We aimed to assess the acute effects of vaping and their reversibility on biological/clinical cardiorespiratory parameters [serum/urine pneumoproteins, hemodynamic parameters, lung-function test and diffusing capacities, transcutaneous gas tensions (primary outcome), and skin microcirculatory blood flow]. Regular e-cigarette users were enrolled in this randomized, investigator-blinded, three-period crossover study. The periods consisted of nicotine-vaping (nicotine-session), nicotine-free vaping (nicotine-free-session), and complete cessation of vaping (stop-session), all maintained for 5 days before the session began. Multiparametric metabolomic analyses were used to verify subjects' protocol compliance. Biological/clinical cardiorespiratory parameters were assessed at the beginning of each session (baseline) and after acute vaping exposure. Compared with the nicotine- and nicotine-free-sessions, a specific metabolomic signature characterized the stop-session. Baseline serum club cell protein-16 was higher during the stop-session than the other sessions (P < 0.01), and heart rate was higher in the nicotine-session (P < 0.001). Compared with acute sham-vaping in the stop-session, acute nicotine-vaping (nicotine-session) and acute nicotine-free vaping (nicotine-free-session) slightly decreased skin oxygen tension (P < 0.05). In regular e-cigarette-users, short-term vaping cessation seemed to shift baseline urine metabolome and increased serum club cell protein-16 concentration, suggesting a decrease in lung inflammation. Additionally, acute vaping with and without nicotine decreased slightly transcutaneous oxygen tension, likely as a result of lung gas exchanges disturbances.
Collapse
Affiliation(s)
- Martin Chaumont
- Department of Cardiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Institute for Translational Research in Cardiovascular and Respiratory Sciences, Université Libre de Bruxelles, Brussels, Belgium
| | - Vanessa Tagliatti
- Department of Human Biology and Toxicology, University of Mons, Mons, Belgium
| | - El Mehdi Channan
- Department of Cardiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Institute for Translational Research in Cardiovascular and Respiratory Sciences, Université Libre de Bruxelles, Brussels, Belgium
| | - Jean-Marie Colet
- Department of Human Biology and Toxicology, University of Mons, Mons, Belgium
| | - Alfred Bernard
- Laboratory of Toxicology and Applied Pharmacology, Institute of Experimental and Clinical Research, Université Catholique de Louvain, Brussels, Belgium
| | - Sofia Morra
- Department of Cardiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Institute for Translational Research in Cardiovascular and Respiratory Sciences, Université Libre de Bruxelles, Brussels, Belgium
| | - Guillaume Deprez
- Department of Clinical Chemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Alain Van Muylem
- Chest Department, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Nadia Debbas
- Department of Cardiology, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles, Brussels, Belgium
| | - Thomas Schaefer
- Cardio-Pulmonary Exercise Laboratory, Université Libre de Bruxelles, Brussels, Belgium
| | - Vitalie Faoro
- Cardio-Pulmonary Exercise Laboratory, Université Libre de Bruxelles, Brussels, Belgium
| | - Philippe van de Borne
- Department of Cardiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Institute for Translational Research in Cardiovascular and Respiratory Sciences, Université Libre de Bruxelles, Brussels, Belgium
| |
Collapse
|
20
|
Otto T, Schaefer T, Herrmann H. Aqueous-Phase Oxidation of cis-β-Isoprene Epoxydiol by Hydroxyl Radicals and Its Impact on Atmospheric Isoprene Processing. J Phys Chem A 2019; 123:10599-10608. [DOI: 10.1021/acs.jpca.9b08836] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tobias Otto
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Saxony, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Saxony, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Saxony, Germany
| |
Collapse
|
21
|
He L, Schaefer T, Otto T, Kroflič A, Herrmann H. Kinetic and Theoretical Study of the Atmospheric Aqueous-Phase Reactions of OH Radicals with Methoxyphenolic Compounds. J Phys Chem A 2019; 123:7828-7838. [PMID: 31397571 DOI: 10.1021/acs.jpca.9b05696] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Methoxyphenols, which are emitted through biomass burning, are an important species in atmospheric chemistry. In the present study, temperature-dependent aqueous-phase OH radical reactions of six methoxyphenols and two related phenols have been investigated through laser flash photolysis and the density functional theory. The rate constants obtained were in a range of (1.1-1.9) × 1010 L mol-1 s-1 with k(3-MC) > k(Cre) ≈ k(Syr) ≈ k(MEP) > k(Res) > k(3-MP) > k(2-EP) ≈ k(2-MP). We derived the parameters of these reactions from the obtained T-dependent rate constants and found a mean Arrhenius activation energy of 16.9 kJ mol-1. The diffusion rate constants were calculated for each case and compared to the measured ones. Generally, the rate constants are found to be close to fully diffusion-controlled (kdiff = (1.4-1.5) × 1010 L mol-1 s-1 for all reactions). A structure-function relationship was established through the measurement result, which could be used for predicting unknown rate constants of other phenolic compounds. All of these findings are expected to enhance the predictive capabilities of models, such as the chemical aqueous-phase radical mechanism.
Collapse
Affiliation(s)
- Lin He
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Tobias Otto
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Ana Kroflič
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany.,Department of Analytical Chemistry , National Institute of Chemistry , Hajdrihova 19 , SI-1000 Ljubljana , Slovenia
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany.,School of Environmental Science and Engineering , Shandong University , Binhai Road 72 , 266237 Qingdao , China
| |
Collapse
|
22
|
Affiliation(s)
- Tamara Felber
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstrasse 15, 04318 Leipzig, Germany
| |
Collapse
|
23
|
Liu J, Wu L, Kümmel S, Yao J, Schaefer T, Herrmann H, Richnow HH. Carbon and hydrogen stable isotope analysis for characterizing the chemical degradation of tributyl phosphate. Chemosphere 2018; 212:133-142. [PMID: 30144674 DOI: 10.1016/j.chemosphere.2018.08.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 08/06/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Tributyl phosphate (TBP) belongs to the group of trialkyl substituted organophosphate esters. Its chemical reactivity depends on the stability of various chemical bonds. TBP was used as a model compound for the development of a concept using stable isotope fractionation associated with bond cleavage reactions for better understanding the fate of TBP in the environment. Carbon isotope enrichment factors (εC) of TBP hydrolysis were found to be pH dependent (-3.8 ± 0.3‰ at pH 2, -4.6 ± 0.5‰ at pH 7, -2.8 ± 0.1‰ at pH 9, no isotope fractionation at pH 12), which is in accordance with the mode of a SN2 hydrolytic bond cleavage. Hydrogen isotope fractionation was negligible as no H bond cleavage is involved during hydrolysis. The apparent carbon kinetic isotope effect (AKIEC) ranged from 1.045 to 1.058. In contrast to hydrolysis, both carbon and hydrogen isotope fractionation were observed during radical oxidation of TBP by OH and SO4-, yielding εC from -0.9 ± 0.1‰ to -0.5 ± 0.1‰ and εH from -20 ± 2‰ to -11 ± 1‰. AKIEC and AKIEH varied from 1.007 to 1.011 and from 1.594 to 2.174, respectively. The correlation of 2H and 13C isotope fractionation revealed Λ values ranging from 17 ± 1 to 25 ± 6. Results demonstrated that the correlation of 2H and 13C isotope fractionation of TBP allowed to identify radical reactions and to distinguish them from hydrolysis. The presented dual isotope analysis approach has diagnostic value for characterizing the chemical transformation of TBP in the environment.
Collapse
Affiliation(s)
- Jia Liu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Xueyuan Road No.30, Haidian District, Beijing 100083, PR China; Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße15, Leipzig 04318, Germany
| | - Langping Wu
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße15, Leipzig 04318, Germany
| | - Steffen Kümmel
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße15, Leipzig 04318, Germany
| | - Jun Yao
- School of Water Resources and Environment, China University of Geosciences (Beijing), Xueyuan Road No.29, Haidian District, Beijing 100083, PR China
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße15, Leipzig 04318, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße15, Leipzig 04318, Germany
| | - Hans-Hermann Richnow
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße15, Leipzig 04318, Germany; School of Water Resources and Environment, China University of Geosciences (Beijing), Xueyuan Road No.29, Haidian District, Beijing 100083, PR China.
| |
Collapse
|
24
|
Abstract
Terpene-derived acids formed through the atmospheric gas-phase oxidation of terpenes are able to efficiently undergo a phase transfer into the aqueous phase. The subsequent aqueous-phase oxidation of such compounds has not been intensely studied. Accordingly, the aqueous-phase second-order rate constants of the oxidation reactions of cis-pinonic acid (CPA) and (+)-camphoric acid (+CA) with hydroxyl radicals (•OH), nitrate radicals (NO3•), and sulfate radicals (SO4•-) were investigated as a function of temperature and pH in the present study. For CPA and +CA the following •OH reaction rate constants at T = 298 K are determined: ksecond(CPA, pH<2) = (2.8 ± 0.1) × 109 L mol-1 s-1, ksecond(CPA, pH>8) = (2.7 ± 0.3) × 109 L mol-1 s-1, ksecond(+CA, pH<2) = (2.1 ± 0.1) × 109 L mol-1 s-1, ksecond(+CA, pH=5.3) = (2.7 ± 0.3) × 109 L mol-1 s-1, ksecond(+CA, pH>8) = (2.7 ± 0.1) × 109 L mol-1 s-1. In order to assess the atmospheric impact of the aqueous-phase oxidation of such compounds, atmospheric aqueous-phase lifetimes were calculated for two model scenarios based on CAPRAM 3.0i. The aqueous-phase oxidation under remote conditions emerges to be the most favored pathway with lifetimes of 5 ± 1 h.
Collapse
Affiliation(s)
- Tobias Otto
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD) , Leibniz-Institute for Tropospheric Research (TROPOS) , Permoserstrasse 15 , 04318 Leipzig , Germany
| |
Collapse
|
25
|
Leu S, Ramadoss A, Schaefer T, Tintignac L, Tostado C, Bink A, Moffa G, Demougin P, Moes S, Mariani L, Boulay J. P04.04 Regulation of glioma cell invasion by 3q26 gene products PIK3CA, SOX2 and OPA1. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- S Leu
- Neurosurgery Clinic, University Hospital of Basel, Basel, Switzerl
| | - A Ramadoss
- Laboratory of Brain Tumor Biology, University of Basel, Basel, Switzerl
| | - T Schaefer
- Stem Cells and Hematopoiesis Laboratory, Department of Biomedicine, University of Basel, Basel, Switzerl
| | - L Tintignac
- Neuromuscular Research Laboratory, Department of Biomedicine, Basel, Switzerl
| | - C Tostado
- Laboratory of Brain Tumor Biology, University of Basel, Basel, Switzerl
| | - A Bink
- Department of Neuroradiology, University Hospital and University of Basel, Basel, Switzerl
| | - G Moffa
- Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital of Basel, Basel, Switzerl
| | - P Demougin
- Life Sciences Training Facility, Biozentrum, University of Basel, Basel, Switzerl
| | - S Moes
- Proteomics Core Facility, Biozentrum, University of Basel, Basel, Switzerland
| | - L Mariani
- Neurosurgery Clinic, University Hospital of Basel, Basel, Switzerl
| | - J Boulay
- Laboratory of Brain Tumor Biology, University of Basel, Basel, Switzerl
| |
Collapse
|
26
|
Leroy C, Schuster J, Schaefer T, Müller-Buschbaum K, Braunschweig H, Bryce D. Linear dicoordinate beryllium: a 9Be solid-state NMR study of a discrete zero-valent s-block beryllium complex. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Beryllium-9 (9Be) quadrupolar coupling and chemical shift tensor data are reported for bis(1-(2,6-diisopropylphenyl)-3,3,5,5-tetramethylpyrrolidine-2-ylidene)beryllium (Be(CAAC)2). These are the first such data for beryllium in a linear dicoordinate environment. The 9Be quadrupolar coupling constant, 2.36(0.02) MHz, is the largest recorded in the solid state to date for this isotope. The span of the beryllium chemical shift tensor, 22(2) ppm, covers about half of the known 9Be chemical shift range, and the isotropic 9Be chemical shift, 32.0(0.3) ppm, is the largest reported in the solid state to our knowledge. DFT calculations reproduce the experimental data well. A natural localized molecular orbital approach has been used to explain the origins and orientation of the beryllium electric field gradient tensor. The single-crystal X-ray structure of a second polymorph of Be(CAAC)2 is also reported. Inspection of the powder X-ray diffraction data shows that the new crystal structure is part of the bulk product next to another crystalline phase. Therefore, experimental X-ray powder data for the microcrystalline powder sample and the SSNMR data do not fully match either the originally reported crystal structure (Arrowsmith et al. Nat. Chem. 2016, 8, 890–894) or the new polymorph. The ability of solid-state NMR and powder X-ray diffraction to characterize powdered samples was thus particularly useful in this work.
Collapse
Affiliation(s)
- C. Leroy
- Department of Chemistry and Biomolecular Sciences & Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, ON K1N 6N5, Canada
| | - J.K. Schuster
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - T. Schaefer
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - K. Müller-Buschbaum
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - H. Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - D.L. Bryce
- Department of Chemistry and Biomolecular Sciences & Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, ON K1N 6N5, Canada
| |
Collapse
|
27
|
Schaefer T, Herrmann H. Competition kinetics of OH radical reactions with oxygenated organic compounds in aqueous solution: rate constants and internal optical absorption effects. Phys Chem Chem Phys 2018; 20:10939-10948. [PMID: 29623312 DOI: 10.1039/c7cp08571k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Oxygenated organic compounds are omnipresent in the troposphere, due to their strong emissions from either biogenic or anthropogenic sources. Additionally, the degradation and oxidation processes of volatile organic compounds (VOCs) result in the production of oxygenated organic compounds in the troposphere. The degradation and conversion of these compounds are often initiated by radical reactions and occur in the gas phase as well as in the aqueous phase, including cloud droplets, fog, haze, rain or hygroscopic particles containing 'aerosol liquid water (ALW)'. In the present study, the temperature-dependent OH radical reactions with oxygenated organic compounds in the aqueous phase have been investigated by laser flash photolysis. To determine the rate constants, the OH radical - thiocyanate anion competition kinetics method has been used. Once the organic reactant has an absorption at the excitation wavelength of the photolysis laser, the initial OH concentration decreases. This internal absorption effect leads to an overestimated rate constant of the investigated compound. The present study considers this contribution in order to clarify the internal absorption effect of the investigated organic compounds. The following rate constants for OH radical oxidation reactions of the oxygenated organic compounds have been obtained: acetone (2-propanone) k298K = (7.6 ± 1.0) × 107 L mol-1 s-1, 1-hydroxypropan-2-one k298K = (1.1 ± 0.1) × 109 L mol-1 s-1, 1,3-dihydroxypropan-2-one k298K = (1.5 ± 0.1) × 109 L mol-1 s-1, 2,3-dihydroxypropanal k298K = (1.3 ± 0.1) × 109 L mol-1 s-1, butane-1,3-diol k298K = (2.5 ± 0.1) × 109 L mol-1 s-1, butane-2,3-diol k298K = (2.0 ± 0.1) × 109 L mol-1 s-1 and hexane-1,2-diol k298K = (4.6 ± 0.4) × 109 L mol-1 s-1. With the rate constants obtained and their T-dependencies, the source and sink processes of oxygenated organic compounds in the tropospheric aqueous phase are arrived at precisely. These findings might enhance the predictive capabilities of models such as the chemical aqueous-phase radical mechanism (CAPRAM).
Collapse
Affiliation(s)
- T Schaefer
- Leibniz-Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD), Permoserstraße 15, Leipzig 04318, Germany.
| | | |
Collapse
|
28
|
Maninger N, Mendoza SP, Williams DR, Mason WA, Cherry SR, Rowland DJ, Schaefer T, Bales KL. Imaging, Behavior and Endocrine Analysis of "Jealousy" in a Monogamous Primate. Front Ecol Evol 2017; 5. [PMID: 29682503 DOI: 10.3389/fevo.2017.00119] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Understanding the neurobiology of social bonding in non-human primates is a critical step in understanding the evolution of monogamy, as well as understanding the neural substrates for emotion and behavior. Coppery titi monkeys (Callicebus cupreus) form strong pair bonds, characterized by selective preference for their pair mate, mate-guarding, physiological and behavioral agitation upon separation, and social buffering. Mate-guarding, or the "maintenance" phase of pair bonding, is relatively under-studied in primates. In the current study, we used functional imaging to examine how male titi monkeys viewing their pair mate in close proximity to a stranger male would change regional cerebral glucose metabolism. We predicted that this situation would challenge the pair bond and induce "jealousy" in the males. Animals were injected with [18F]-fluorodeoxyglucose (FDG), returned to their cage for 30 min of conscious uptake, placed under anesthesia, and then scanned for 1 hour on a microPET P4 scanner. During the FDG uptake, males (n=8) had a view of either their female pair mate next to a stranger male ("jealousy" condition) or a stranger female next to a stranger male (control condition). Blood and cerebrospinal fluid samples were collected and assayed for testosterone, cortisol, oxytocin, and vasopressin. Positron emission tomography (PET) was co-registered with structural magnetic resonance imaging (MRI), and region of interest analysis was carried out. Bayesian multivariate multilevel analyses found that the right lateral septum (Pr(b>0)=93%), left posterior cingulate cortex (Pr(b>0)=99%), and left anterior cingulate (Pr(b>0)=96%) showed higher FDG uptake in the jealousy condition compared to the control condition, while the right medial amygdala (Pr(b>0)=85%) showed lower FDG uptake. Plasma testosterone and cortisol concentrations were higher during the jealousy condition. During the jealousy condition, duration of time spent looking across at the pair mate next to a stranger male was associated with higher plasma cortisol concentrations. The lateral septum has been shown to be involved in mate-guarding and mating-induced aggression in monogamous rodents, while the cingulate cortex has been linked to territoriality. These neural and physiological changes may underpin the emotion of jealousy, which can act in a monogamous species to preserve the long-term integrity of the pair.
Collapse
Affiliation(s)
- Nicole Maninger
- California National Primate Research Center, University of California, Davis, CA, USA
| | - Sally P Mendoza
- Department of Psychology, University of California-Davis, Davis, California
| | - Donald R Williams
- Department of Psychology, University of California-Davis, Davis, California
| | - William A Mason
- Department of Psychology, University of California-Davis, Davis, California
| | - Simon R Cherry
- Department of Biomedical Engineering, University of California, Davis, Davis, California.,Center for Molecular and Genomic Imaging, University of California, Davis, Davis, California
| | - Douglas J Rowland
- Center for Molecular and Genomic Imaging, University of California, Davis, Davis, California
| | - Thomas Schaefer
- California National Primate Research Center, University of California, Davis, CA, USA
| | - Karen L Bales
- California National Primate Research Center, University of California, Davis, CA, USA.,Department of Psychology, University of California-Davis, Davis, California
| |
Collapse
|
29
|
Queisser A, Hagedorn S, Wang H, Schaefer T, Konantz M, Alavi S, Deng M, Vogel W, von Mässenhausen A, Kristiansen G, Duensing S, Kirfel J, Lengerke C, Perner S. Ecotropic viral integration site 1, a novel oncogene in prostate cancer. Oncogene 2016; 36:1573-1584. [PMID: 27617580 DOI: 10.1038/onc.2016.325] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 07/08/2016] [Accepted: 07/26/2016] [Indexed: 02/07/2023]
Abstract
Prostate cancer (PCa) is the most commonly diagnosed non-cutaneous cancer in men in the western world. Mutations in tumor suppressor genes and in oncogenes are important for PCa progression, whereas the role of stem cell proteins in prostate carcinogenesis is insufficiently examined. This study investigates the role of the transcriptional regulator Ecotropic Viral Integration site 1 (EVI1), known as an essential modulator of hematopoietic and leukemic stem cell biology, in prostate carcinogenesis. We show that in healthy prostatic tissue, EVI1 expression is confined to the prostate stem cell compartment located at the basal layer, as identified by the stem cell marker CD44. Instead, in a PCa progression cohort comprising 219 samples from patients with primary PCa, lymph node and distant metastases, EVI1 protein was heterogeneously distributed within samples and high expression is associated with tumor progression (P<0.001), suggesting EVI1 induction as a driver event. Functionally, short hairpin RNA-mediated knockdown of EVI1 inhibited proliferation, cell cycle progression, migratory capacity and anchorage-independent growth of human PCa cells, while enhancing their apoptosis sensitivity. Interestingly, modulation of EVI1 expression also strongly regulated stem cell properties (including expression of the stem cell marker SOX2) and in vivo tumor initiation capacity. Further emphasizing a functional correlation between EVI1 induction and tumor progression, upregulation of EVI1 expression was noted in experimentally derived docetaxel-resistant PCa cells. Importantly, knockdown of EVI1 in these cells restored sensitivity to docetaxel, in part by downregulating anti-apoptotic BCL2. Together, these data indicate EVI1 as a novel molecular regulator of PCa progression and therapy resistance that may control prostate carcinogenesis at the stem cell level.
Collapse
Affiliation(s)
- A Queisser
- Section for Prostate Cancer Research, University Hospital of Bonn, Bonn, Germany.,Institute of Pathology, University Hospital of Bonn, Bonn, Germany.,Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany
| | - S Hagedorn
- Section for Prostate Cancer Research, University Hospital of Bonn, Bonn, Germany.,Institute of Pathology, University Hospital of Bonn, Bonn, Germany.,Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany
| | - H Wang
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - T Schaefer
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - M Konantz
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - S Alavi
- Section for Prostate Cancer Research, University Hospital of Bonn, Bonn, Germany.,Institute of Pathology, University Hospital of Bonn, Bonn, Germany.,Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany
| | - M Deng
- Pathology of the University Medical Center Schleswig-Holstein, Campus Luebeck and the Research Center Borstel, Leibniz Center for Medicine and Biosciences, 23538 Luebeck and 23845 Borstel, Borstel, Germany
| | - W Vogel
- Pathology of the University Medical Center Schleswig-Holstein, Campus Luebeck and the Research Center Borstel, Leibniz Center for Medicine and Biosciences, 23538 Luebeck and 23845 Borstel, Borstel, Germany
| | - A von Mässenhausen
- Section for Prostate Cancer Research, University Hospital of Bonn, Bonn, Germany.,Institute of Pathology, University Hospital of Bonn, Bonn, Germany.,Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany
| | - G Kristiansen
- Institute of Pathology, University Hospital of Bonn, Bonn, Germany.,Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany
| | - S Duensing
- Section of Molecular Urooncology, Department of Urology, University of Heidelberg School of Medicine, Heidelberg, Germany
| | - J Kirfel
- Institute of Pathology, University Hospital of Bonn, Bonn, Germany.,Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany
| | - C Lengerke
- Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - S Perner
- Section for Prostate Cancer Research, University Hospital of Bonn, Bonn, Germany.,Institute of Pathology, University Hospital of Bonn, Bonn, Germany.,Center for Integrated Oncology Cologne/Bonn, University Hospital of Bonn, Bonn, Germany.,Pathology of the University Medical Center Schleswig-Holstein, Campus Luebeck and the Research Center Borstel, Leibniz Center for Medicine and Biosciences, 23538 Luebeck and 23845 Borstel, Borstel, Germany
| |
Collapse
|
30
|
Schaefer T, Guenther T. Exploring strategic planning outcomes: the influential role of top versus middle management participation. J Manag Control 2016. [DOI: 10.1007/s00187-016-0230-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
31
|
Zhang N, Geronimo I, Paneth P, Schindelka J, Schaefer T, Herrmann H, Vogt C, Richnow HH. Analyzing sites of OH radical attack (ring vs. side chain) in oxidation of substituted benzenes via dual stable isotope analysis (δ(13)C and δ(2)H). Sci Total Environ 2016; 542:484-494. [PMID: 26520272 DOI: 10.1016/j.scitotenv.2015.10.075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 10/14/2015] [Accepted: 10/14/2015] [Indexed: 06/05/2023]
Abstract
OH radicals generated by the photolysis of H2O2 can degrade aromatic contaminants by either attacking the aromatic ring to form phenolic products or oxidizing the substituent. We characterized these competing pathways by analyzing the carbon and hydrogen isotope fractionation (εC and εH) of various substituted benzenes. For benzene and halobenzenes that only undergo ring addition, low values of εC (-0.7‰ to -1.0‰) were observed compared with theoretical values (-7.2‰ to -8‰), possibly owing to masking effect caused by pre-equilibrium between the substrate and OH radical preceding the rate-limiting step. In contrast, the addition of OH radicals to nitrobenzene ring showed a higher εC (-3.9‰), probably due to the lower reactivity. Xylene isomers, anisole, aniline, N,N-dimethylaniline, and benzonitrile yielded normal εH values (-2.8‰ to -29‰) indicating the occurrence of side-chain reactions, in contrast to the inverse εH (11.7‰ to 30‰) observed for ring addition due to an sp(2) to sp(3) hybridization change at the reacting carbon. Inverse εH values for toluene (14‰) and ethylbenzene (30‰) were observed despite the formation of side-chain oxidation products, suggesting that ring addition has a larger contribution to isotope fractionation. Dual element isotope slopes (∆δ(2)H/∆δ(13)C) therefore allow identification of significant degradation pathways of aromatic compounds by photochemically induced OH radicals. Issues that should be addressed in future studies include quantitative determination of the contribution of each competing pathway to the observed isotope fractionation and characterization of physical processes preceding the reaction that could affect isotope fractionation.
Collapse
Affiliation(s)
- Ning Zhang
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße 15, 04318 Leipzig, Germany
| | - Inacrist Geronimo
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Łódź, Poland
| | - Piotr Paneth
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Łódź, Poland
| | - Janine Schindelka
- Department of Chemistry, Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Department of Chemistry, Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Department of Chemistry, Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Carsten Vogt
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße 15, 04318 Leipzig, Germany
| | - Hans H Richnow
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße 15, 04318 Leipzig, Germany.
| |
Collapse
|
32
|
Herrmann H, Schaefer T, Tilgner A, Styler SA, Weller C, Teich M, Otto T. Tropospheric aqueous-phase chemistry: kinetics, mechanisms, and its coupling to a changing gas phase. Chem Rev 2015; 115:4259-334. [PMID: 25950643 DOI: 10.1021/cr500447k] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Andreas Tilgner
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Sarah A Styler
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Christian Weller
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Monique Teich
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Tobias Otto
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| |
Collapse
|
33
|
Schaefer T, Scharffetter K, Bolsen K, Jugert F, Lehmann P, Merk HF, Goerz G. Effect of UVASUN on porphyrin metabolism and P-450 isoenzymes in hexachlorobenzene-induced porphyric rats. Curr Probl Dermatol 2015; 20:106-15. [PMID: 1935202 DOI: 10.1159/000420014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- T Schaefer
- Department of Dermatology, University of Düsseldorf, FRG
| | | | | | | | | | | | | |
Collapse
|
34
|
Schaefer T, van Pinxteren D, Herrmann H. Multiphase chemistry of glyoxal: revised kinetics of the alkyl radical reaction with molecular oxygen and the reaction of glyoxal with OH, NO3, and SO4- in aqueous solution. Environ Sci Technol 2015; 49:343-350. [PMID: 25478901 DOI: 10.1021/es505860s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The rate constant for the reaction of the hydrated glyoxyl radical (CH(OH)2-C(OH)2(·) with O2 has been determined as k(298) K = (1.2 ± 0.3) × 10(9) L mol(-1) s(-1) at pH 4.8. This experimental value is considerably higher than a widely used estimated value of about k = 1 × 10(6) L mol(-1) s(-1). As the aqueous phase conversion of glyoxal is of wide interest for aqSOA formation, we suggest that the newly determined rate constant should be applied in multiphase models. The formation of the dimerization product tartaric acid has as well been studied. This product is found, however in significant yields only when the oxygen content of the solution is reduced. The formation of dimers from the recombination of alkyl radicals in the atmospheric aqueous phase should hence be treated with great care. Finally, the reactions of the free radicals OH, NO3, and SO4(-) with glyoxal have been investigated and rate constants of k(298) K (OH) = (9.2 ± 0.5) × 10(8) L mol(-1) s(-1), k(298) K (SO4(-)) = (2.4 ± 0.2) × 10(7) L mol(-1) s(-1) and k(298) K (NO3) = (4.5 ± 0.3) × 10(6) L mol(-1) s(-1) were obtained.
Collapse
Affiliation(s)
- T Schaefer
- Leibniz-Institute for Tropospheric Research (TROPOS) , Atmospheric Chemistry Department, Permoserstraße 15, 04318 Leipzig, Germany
| | | | | |
Collapse
|
35
|
Schöne L, Schindelka J, Szeremeta E, Schaefer T, Hoffmann D, Rudzinski KJ, Szmigielski R, Herrmann H. Atmospheric aqueous phase radical chemistry of the isoprene oxidation products methacrolein, methyl vinyl ketone, methacrylic acid and acrylic acid – kinetics and product studies. Phys Chem Chem Phys 2014; 16:6257-72. [DOI: 10.1039/c3cp54859g] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
36
|
Berneburg M, Herzinger T, Rampf J, Hoetzenecker W, Guenova E, Meisner C, Maetzke J, Schaefer T, Eberlein B, Scharffetter-Kochanek K, Rocken M. Efficacy of bath psoralen plus ultraviolet A (PUVA) vs. system PUVA in psoriasis: a prospective, open, randomized, multicentre study. Br J Dermatol 2013; 169:704-8. [DOI: 10.1111/bjd.12466] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/02/2013] [Indexed: 01/06/2023]
Affiliation(s)
- M. Berneburg
- Department of Dermatology; Eberhard Karls University; Liebermeisterstrasse 25; Tübingen; D-72076; Germany
| | - T. Herzinger
- Department of Dermatology; Ludwig Maximilians University; Munich; Germany
| | - J. Rampf
- Department of Dermatology; University of Ulm; Ulm; Germany
| | - W. Hoetzenecker
- Department of Dermatology; University of Zürich; Zürich; Switzerland
| | - E. Guenova
- Department of Dermatology; University of Zürich; Zürich; Switzerland
| | - C. Meisner
- Department of Medical Biometry; Eberhard Karls University; Liebermeisterstrasse 25; Tübingen; D-72076; Germany
| | - J. Maetzke
- Department of Dermatology; University of Ulm; Ulm; Germany
| | | | - B. Eberlein
- Department of Dermatology and Allergy Biederstein; Technische Universität München; Munich; Germany
| | | | - M. Rocken
- Department of Dermatology; Eberhard Karls University; Liebermeisterstrasse 25; Tübingen; D-72076; Germany
| |
Collapse
|
37
|
Schaefer T, Schindelka J, Hoffmann D, Herrmann H. Laboratory Kinetic and Mechanistic Studies on the OH-Initiated Oxidation of Acetone in Aqueous Solution. J Phys Chem A 2012; 116:6317-26. [DOI: 10.1021/jp2120753] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Thomas Schaefer
- Leibniz-Institut für Troposphärenforschung (IfT), Abteilung Chemie, Permoserstrasse 15, D-04318
Leipzig, Germany
| | - Janine Schindelka
- Leibniz-Institut für Troposphärenforschung (IfT), Abteilung Chemie, Permoserstrasse 15, D-04318
Leipzig, Germany
| | - Dirk Hoffmann
- Leibniz-Institut für Troposphärenforschung (IfT), Abteilung Chemie, Permoserstrasse 15, D-04318
Leipzig, Germany
| | - Hartmut Herrmann
- Leibniz-Institut für Troposphärenforschung (IfT), Abteilung Chemie, Permoserstrasse 15, D-04318
Leipzig, Germany
| |
Collapse
|
38
|
Schaefer T, Zajonz A, Lorentz P, Bohnacker T, Wymann MP, Schweighoffer T. Luminal decoration of blood vessels by activated perivasal mast cells in allergic rhinitis. Allergy 2012; 67:510-20. [PMID: 22313335 DOI: 10.1111/j.1398-9995.2012.02790.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/30/2011] [Indexed: 12/14/2022]
Abstract
BACKGROUND In allergic diseases, like in rhinitis, antigen challenge induces rapid degranulation of tissue resident mast cells and subsequent recruitment of leukocytes in response to soluble immunmodulators. The fate of mast cell-derived, membrane associated factors in inflamed tissue remained however unresolved. METHODS Components of the mast cell granular membrane, including the unique marker CD63var, were examined by FACS and by confocal laser scanning microscopy in cell culture and in diseased human tissue. RESULTS We discovered that selected mast cell membrane components appeared on the surface of distinct bystander cells. Acceptor cells did not acquire these molecules simply by uptake of soluble material or in the form of exosomes. Instead, physically stable cell-to-cell contact was required for transfer, in which a Notch2-Jagged1 interaction played a decisive role. This process is activation-dependent, unidirectional, and involves a unique membrane topology. Endothelial cells were particularly efficient acceptors. In organotypic 3D in vitro cultures we found that transferred mast cell molecules traversed an endothelial monolayer, and reappeared focally compacted on its distal surface, away from the actual contact zone. Moreover, we observed that such mast cell-derived membrane patches decorate microcapillaries in the nasal mucosa of allergic rhinitis patients. CONCLUSION Direct membrane transfer from perivasal mast cells into nearby blood vessels constitutes a novel mechanism to modulate endothelial surface features with apparent significance in allergic diseases.
Collapse
Affiliation(s)
- T. Schaefer
- Novartis Institutes for Biomedical Research (NIBR); Basel; Switzerland
| | - A. Zajonz
- Novartis Institutes for Biomedical Research (NIBR); Basel; Switzerland
| | - P. Lorentz
- Institute of Biochemistry and Genetics; Department of Biomedicine; University of Basel; Basel; Switzerland
| | - T. Bohnacker
- Institute of Biochemistry and Genetics; Department of Biomedicine; University of Basel; Basel; Switzerland
| | - M. P. Wymann
- Institute of Biochemistry and Genetics; Department of Biomedicine; University of Basel; Basel; Switzerland
| | - T. Schweighoffer
- Novartis Institutes for Biomedical Research (NIBR); Basel; Switzerland
| |
Collapse
|
39
|
Anderson C, Assyia D, Bannerman K, Fehr A, Hermanson J, Hron N, Hsu J, Larson N, Long G, Long J, Mann D, McLean R, Menon V, Mohar G, Moret F, Nguyen V, O'Leary K, Pedersen K, Pohl R, Reynolds H, Rice A, Rodriguez T, Rottinghaus A, Schaefer T, Scott T, Strombom K, Vollick J, Wehemyer G, Whitcomb B, Taghizadeh A, Whalen J, Kessler E. Cholera toxin: Vibrio cholera's dehydration machine. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.lb270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- C. Anderson
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - D. Assyia
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. Bannerman
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Fehr
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Hermanson
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - N. Hron
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Hsu
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - N. Larson
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - G. Long
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Long
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - D. Mann
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - R. McLean
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - V. Menon
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - G. Mohar
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - F. Moret
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - V. Nguyen
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. O'Leary
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. Pedersen
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - R. Pohl
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - H. Reynolds
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Rice
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - T. Rodriguez
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Rottinghaus
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - T. Schaefer
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - T. Scott
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. Strombom
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Vollick
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - G. Wehemyer
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - B. Whitcomb
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Taghizadeh
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Whalen
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - E. Kessler
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| |
Collapse
|
40
|
|
41
|
Herrmann H, Hoffmann D, Schaefer T, Bräuer P, Tilgner A. Tropospheric aqueous-phase free-radical chemistry: radical sources, spectra, reaction kinetics and prediction tools. Chemphyschem 2011; 11:3796-822. [PMID: 21120981 DOI: 10.1002/cphc.201000533] [Citation(s) in RCA: 176] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The most important radicals which need to be considered for the description of chemical conversion processes in tropospheric aqueous systems are the hydroxyl radical (OH), the nitrate radical (NO(3)) and sulphur-containing radicals such as the sulphate radical (SO(4)(-)). For each of the three radicals their generation and their properties are discussed first in the corresponding sections. The main focus herein is to summarize newly published aqueous-phase kinetic data on OH, NO(3) and SO(4)(-) radical reactions relevant for the description of multiphase tropospheric chemistry. The data compilation builds up on earlier datasets published in the literature. Since the last review in 2003 (H. Herrmann, Chem. Rev. 2003, 103, 4691-4716) more than hundred new rate constants are available from literature. In case of larger discrepancies between novel and already published rate constants the available kinetic data for these reactions are discussed and recommendations are provided when possible. As many OH kinetic data are obtained by means of the thiocyanate (SCN(-)) system in competition kinetic measurements of OH radical reactions this system is reviewed in a subchapter of this review. Available rate constants for the reaction sequence following the reaction of OH+SCN(-) are summarized. Newly published data since 2003 have been considered and averaged rate constants are calculated. Applying competition kinetics measurements usually the formation of the radical anion (SCN)(2)(-) is monitored directly by absorption measurements. Within this subchapter available absorption spectra of the (SCN)(2)(-) radical anion from the last five decades are presented. Based on these spectra an averaged (SCN)(2)(-) spectrum was calculated. In the last years different estimation methods for aqueous phase kinetic data of radical reactions have been developed and published. Such methods are often essential to estimate kinetic data which are not accessible from the literature. Approaches for rate constant prediction include empirical correlations as well as structure activity relationships (SAR) either with or without the usage of quantum chemical descriptors. Recently published estimation methods for OH, NO(3) and SO(4)(-) radical reactions in aqueous solution are finally summarized, compared and discussed.
Collapse
Affiliation(s)
- Hartmut Herrmann
- Chemistry Department, Leibniz-Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig, Germany.
| | | | | | | | | |
Collapse
|
42
|
Herrmann H, Hoffmann D, Schaefer T, Bräuer P, Tilgner A. Cover Picture: Tropospheric Aqueous‐Phase Free‐Radical Chemistry: Radical Sources, Spectra, Reaction Kinetics and Prediction Tools (ChemPhysChem 18/2010). Chemphyschem 2010. [DOI: 10.1002/cphc.201090089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hartmut Herrmann
- Chemistry Department, Leibniz‐Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig (Germany), Fax: (+49) 3412352325
| | - Dirk Hoffmann
- Chemistry Department, Leibniz‐Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig (Germany), Fax: (+49) 3412352325
| | - Thomas Schaefer
- Chemistry Department, Leibniz‐Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig (Germany), Fax: (+49) 3412352325
| | - Peter Bräuer
- Chemistry Department, Leibniz‐Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig (Germany), Fax: (+49) 3412352325
| | - Andreas Tilgner
- Chemistry Department, Leibniz‐Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig (Germany), Fax: (+49) 3412352325
| |
Collapse
|
43
|
Farina J, Schaefer T, Lopes V, Moojen S, Loureiro F, Schilikman A. P4-10 Computer games training may affect normative values of some event related potentials in children. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60505-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
44
|
Weller C, Hoffmann D, Schaefer T, Herrmann H. Temperature and Ionic Strength Dependence of NO3-radical Reactions with Substituted Phenols in Aqueous Solution. ACTA ACUST UNITED AC 2010. [DOI: 10.1524/zpch.2010.6151] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
NO3 oxidation reactions contribute to the chemical conversion processes of organic compounds in the tropospheric multiphase system. Substituted phenols are known pollutants in cloud droplets, rain, fog and (deliquescent) particles. This study presents rate constants obtained from kinetic investigations of NO3 reactions with different substituted phenolic compounds in the aqueous solution. Effects of the temperature as well as the ionic strength on the reaction rates were measured using a laser flash photolysis – laser long path absorption (LP-LLPA) set-up. The following rate constants at T = 298 K in M-1s-1 were obtained for reactions of the NO3 radical with 4-nitrophenol (k = (8.8±4.6) · 108), 2-nitrophenol (k = (8.3±1.4) · 108), 4-hydroxybenzoic acid (k = (1.5±0.4) · 109), 4-methylphenol (k = (1.7±0.3) · 109), 4-methoxyphenol (k = (2.5±0.4) · 109), 4-aminophenol (k = (2.0±0.3) · 109), 2,6-dichlorophenol (k = (1.3±0.2) · 109), 2,6-dihydroxyphenol (k = (1.7±0.2) · 109), 2,6-dimethylphenol (k = (1.8±0.3) · 109), 2,6-dimethoxyphenol (k = (1.6±0.4) · 109), 2,6-dinitrophenol (k = (2.8±0.9) · 108), 4-hydroxy-3,5-dimethoxybenzaldehyde (k = (1.7±0.3) · 109), 4-hydroxy-3,5-dimethoxybenzoic acid (k = (1.4±0.6) · 109), 4-hydroxy-3-methoxybenzaldehyde (k = (1.1±0.2) · 109), 4-hydroxy-3-methoxybenzoic acid (k = (1.0±0.3) · 109), 3-hydroxy-4-methoxybenzoic acid (k = (1.3±0.4) · 109). Averaged activation energies of: para-substituted phenols are EAߙpara = 11±6 kJ mol-1; 2,6-substituted phenols EAߙ2,6 = 15±4 , poly-substituted phenols EAߙpoly = 16±4 kJ mol-1. From reactivity correlations it is concluded that 4-nitrophenol, 2,6-dinitrophenol and 4-hydroxybenzoic acid react via direct electron transfer. The majority of investigated compounds react in a mixed regime with contribution of both electron transfer and H-atom abstraction. Surprisingly, changes in ionic strength do not affect the reactions dominated by electron transfer but have an influence on the rate constants of reactions with a mixed mechanism.
Collapse
Affiliation(s)
- C. Weller
- Leibniz-Institut für Troposphärenforschung, Leipzig
| | - D. Hoffmann
- Leibniz-Institut für Troposphärenforschung, Leipzig, Deutschland
| | - T. Schaefer
- Leibniz-Institut für Troposphärenforschung,, Leipzig, Deutschland
| | | |
Collapse
|
45
|
Satzger I, Schaefer T, Kuettler U, Broecker V, Voelker B, Ostertag H, Kapp A, Gutzmer R. Analysis of c-KIT expression and KIT gene mutation in human mucosal melanomas. Br J Cancer 2008; 99:2065-9. [PMID: 19018266 PMCID: PMC2607233 DOI: 10.1038/sj.bjc.6604791] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Recent data suggested an increased frequency of KIT aberrations in mucosal melanomas, whereas c-KIT in most types of cutaneous melanomas does not appear to be of pathogenetic importance. However, studies investigating the status of the KIT gene in larger, well-characterised groups of patients with mucosal melanomas are lacking. We analysed 44 archival specimens of 39 well-characterised patients with mucosal melanomas of different locations. c-KIT protein expression was determined by immunhistochemistry, KIT gene mutations were analysed by PCR amplification and DNA sequencing of exons 9, 11, 13, 17 and 18. c-KIT protein expression could be shown in 40 out of 44 (91%) tumours in at least 10% of tumour cells. DNA sequence analysis of the KIT was successfully performed in 37 patients. In 6 out of 37 patients (16%) KIT mutations were found, five in exon 11 and one in exon 18. The presence of mutations in exon 11 correlated with a significant stronger immunohistochemical expression of c-KIT protein (P=0.015). Among the six patients with mutations, in two patients the primary tumour was located in the head/neck region, in three patients in the genitourinary tract and in one patient in the anal/rectal area. In conclusion, KIT mutations can be found in a subset of patients with mucosal melanomas irrespective of the location of the primary tumour. Our data encourage therapeutic attempts with tyrosine kinase inhibitors blocking c-KIT in these patients.
Collapse
Affiliation(s)
- I Satzger
- Department of Dermatology and Allergology, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
46
|
|
47
|
|
48
|
Ritala M, Holm P, Schaefer T, Kristensen HG. Influence of Liquid Bonding Strength on Power Consumption During Granulation in a High Shear Mixer. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639048809151919] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
49
|
|
50
|
Thomsen LJ, Schaefer T, Kristensen HG. Prolonged Release Matrix Pellets Prepared by Melt Pelletization II. Hydrophobic Substances as Meltable Binders. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049409038360] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|