51
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Koo B, Kim Y, Jang YO, Liu H, Kim MG, Lee HJ, Woo MK, Kim C, Shin Y. A novel platform using homobifunctional hydrazide for enrichment and isolation of urinary circulating RNAs. Bioeng Transl Med 2022; 8:e10348. [PMID: 36684108 PMCID: PMC9842063 DOI: 10.1002/btm2.10348] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 04/22/2022] [Accepted: 05/06/2022] [Indexed: 01/25/2023] Open
Abstract
Changes in specific circulating RNA (circRNA) expressions can serve as diagnostic noninvasive biomarkers for prostate cancer (PCa). However, there are still unmet needs, such as unclear types and roles of circRNAs, PCa detection in benign prostatic hyperplasia (BPH) by unstandardized methods, and limitations of sample volume capacity and low circRNA concentrations. This study reports a simple and rapid circRNA enrichment and isolation technique named "HAZIS-CirR" for the analysis of urinary circRNAs. The method utilizes homobifunctional hydrazides with amine-modified zeolite and polyvinylidene fluoride (PVDF) syringe filtration for combining electrostatic and covalent coupling and size-based filtration, and it offers instrument-free isolation of circRNAs in 20 min without volume limitation, thermoregulation, and lysis. HAZIS-CirR has high capture efficiency (82.03%-92.38%) and a 10-fold more sensitive detection limit (20 fM) than before enrichment (200 fM). The clinical utility of HAZIS-CirR is confirmed by analyzing circulating mRNAs and circulating miRNAs in 89 urine samples. Furthermore, three miRNA panels that differentiate PCa from BPH and control, PCa from control, and BPH from control, respectively, are established by comparing miRNA levels. HAZIS-CirR will be used as an optimal and established method for the enrichment and isolation of circRNAs as diagnostic, prognostic, and predictive biomarkers in human cancers.
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Affiliation(s)
- Bonhan Koo
- Department of Biotechnology, College of Life Science and BiotechnologyYonsei UniversitySeodaemun‐gu, SeoulRepublic of Korea
| | - Yunlim Kim
- Department of Urology, Asan Medical CenterUniversity of Ulsan College of MedicineSongpa‐gu, SeoulRepublic of Korea
| | - Yoon Ok Jang
- Department of Biotechnology, College of Life Science and BiotechnologyYonsei UniversitySeodaemun‐gu, SeoulRepublic of Korea
| | - Huifang Liu
- Department of Biotechnology, College of Life Science and BiotechnologyYonsei UniversitySeodaemun‐gu, SeoulRepublic of Korea
| | - Myoung Gyu Kim
- Department of Biotechnology, College of Life Science and BiotechnologyYonsei UniversitySeodaemun‐gu, SeoulRepublic of Korea
| | - Hyo Joo Lee
- Department of Biotechnology, College of Life Science and BiotechnologyYonsei UniversitySeodaemun‐gu, SeoulRepublic of Korea
| | - Myung Kyun Woo
- Department of Biomedical EngineeringSchool of Electrical Engineering, University of UlsanNam‐gu, UlsanRepublic of Korea
| | - Choung‐Soo Kim
- Department of Urology, Asan Medical CenterUniversity of Ulsan College of MedicineSongpa‐gu, SeoulRepublic of Korea
- Department of UrologyEwha Womans University Mokdong HospitalYangcheon‐gu, SeoulRepublic of Korea
| | - Yong Shin
- Department of Biotechnology, College of Life Science and BiotechnologyYonsei UniversitySeodaemun‐gu, SeoulRepublic of Korea
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52
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Gökırmak Söğüt E. Effect of Chemical and Thermal Treatment Priority on Physicochemical Properties and Removal of Crystal Violet Dye from Aqueous Solution. ChemistrySelect 2022. [DOI: 10.1002/slct.202200262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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53
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Vakurov A, Drummond-Brydson R, William N, Sanver D, Bastús N, Moriones OH, Puntes V, Nelson AL. Heterogeneous Rate Constant for Amorphous Silica Nanoparticle Adsorption on Phospholipid Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5372-5380. [PMID: 35471829 PMCID: PMC9097521 DOI: 10.1021/acs.langmuir.1c03155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 03/24/2022] [Indexed: 06/14/2023]
Abstract
The interaction of amorphous silica nanoparticles with phospholipid monolayers and bilayers has received a great deal of interest in recent years and is of importance for assessing potential cellular toxicity of such species, whether natural or synthesized for the purpose of nanomedical drug delivery and other applications. This present communication studies the rate of silica nanoparticle adsorption on to phospholipid monolayers in order to extract a heterogeneous rate constant from the data. This rate constant relates to the initial rate of growth of an adsorbed layer of nanoparticles as SiO2 on a unit area of the monolayer surface from unit concentration in dispersion. Experiments were carried out using the system of dioleoyl phosphatidylcholine (DOPC) monolayers deposited on Pt/Hg electrodes in a flow cell. Additional studies were carried out on the interaction of soluble silica with these layers. Results show that the rate constant is effectively constant with respect to silica nanoparticle size. This is interpreted as indicating that the interaction of hydrated SiO2 molecular species with phospholipid polar groups is the molecular initiating event (MIE) defined as the initial interaction of the silica particle surface with the phospholipid layer surface promoting the adsorption of silica nanoparticles on DOPC. The conclusion is consistent with the observed significant interaction of soluble SiO2 with the DOPC layer and the established properties of the silica-water interface.
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Affiliation(s)
- Alex Vakurov
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
| | - Rik Drummond-Brydson
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, U.K.
| | - Nicola William
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
| | - Didem Sanver
- Department
of Food Engineering, Faculty of Engineering, Necmettin Erbakan University, Konya 42050, Turkey
| | - Neus Bastús
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC, The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, Barcelona 08193, Spain
| | - Oscar H. Moriones
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC, The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, Barcelona 08193, Spain
- Universitat
Autònoma de Barcelona (UAB), Campus UAB, Bellaterra, Barcelona 08193, Spain
| | - V. Puntes
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC, The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, Barcelona 08193, Spain
- Fundacio
Hospital Universitari Vall D’Hebron - Institut De Recerca, Passeig Vall D Hebron, 119-129, Barcelona 08035, Spain
- ICREA, Pg. Lluıs Companys 23, Barcelona 08010, Spain
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54
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Zhao N, Ju F, Song Q, Pan H, Ling H. A simple empirical model for phenanthrene adsorption on soil clay minerals. JOURNAL OF HAZARDOUS MATERIALS 2022; 429:127849. [PMID: 35236031 DOI: 10.1016/j.jhazmat.2021.127849] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/13/2021] [Accepted: 11/16/2021] [Indexed: 06/14/2023]
Abstract
Soil clay minerals are effective substrate adsorbents of polycyclic aromatic hydrocarbons (PAHs) in natural soil. The adsorbed PAHs result in long-term contamination of soils. In this paper, a typical PAH phenanthrene (Phe) and nine high purity clay minerals are selected as representative PAH pollutants and adsorbents, respectively. A series of experiments have been conducted to disclose the relationship between the Phe adsorption effect of these clay minerals and their physical properties, including specific surface area (SSA), cation exchange capacity (CEC) and contact angle (CA). Molecular simulation methods are performed to explore the mechanism of clay mineral structure on Phe adsorption at the molecular level. Density functional theory (DFT) calculation suggests that the adsorption of Phe on clay minerals is mainly due to the van der Waals effect. The strength of the O-H-π effect is greater than that of the hydrophobic effect of Phe adsorption. Molecular dynamic (MD) simulations imply that the hydration effect of cations hinders the Phe hydrophobic adsorption by occupying the adsorption sites. Based on the mechanism explored, a simple empirical model is proposed, and the adsorption distribution coefficient Kd of clay mineral and water phases can be precisely predicted by the three physical properties of clay minerals, without rigorous quantitative analysis of soil clay minerals.
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Affiliation(s)
- Nan Zhao
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Feng Ju
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Quanwei Song
- State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China; CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China
| | - Hui Pan
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Hao Ling
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
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55
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Yadav A, Dindorkar SS. Adsorption behaviour of hexagonal boron nitride nanosheets towards cationic, anionic and neutral dyes: Insights from first principle studies. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128509] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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56
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Tracing the Primordial Chemical Life of Glycine: A Review from Quantum Chemical Simulations. Int J Mol Sci 2022; 23:ijms23084252. [PMID: 35457069 PMCID: PMC9030215 DOI: 10.3390/ijms23084252] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/08/2022] [Accepted: 04/09/2022] [Indexed: 12/28/2022] Open
Abstract
Glycine (Gly), NH2CH2COOH, is the simplest amino acid. Although it has not been directly detected in the interstellar gas-phase medium, it has been identified in comets and meteorites, and its synthesis in these environments has been simulated in terrestrial laboratory experiments. Likewise, condensation of Gly to form peptides in scenarios resembling those present in a primordial Earth has been demonstrated experimentally. Thus, Gly is a paradigmatic system for biomolecular building blocks to investigate how they can be synthesized in astrophysical environments, transported and delivered by fragments of asteroids (meteorites, once they land on Earth) and comets (interplanetary dust particles that land on Earth) to the primitive Earth, and there react to form biopolymers as a step towards the emergence of life. Quantum chemical investigations addressing these Gly-related events have been performed, providing fundamental atomic-scale information and quantitative energetic data. However, they are spread in the literature and difficult to harmonize in a consistent way due to different computational chemistry methodologies and model systems. This review aims to collect the work done so far to characterize, at a quantum mechanical level, the chemical life of Gly, i.e., from its synthesis in the interstellar medium up to its polymerization on Earth.
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57
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Can Mesoporous Silica Speed Up Degradation of Benzodiazepines? Hints from Quantum Mechanical Investigations. MATERIALS 2022; 15:ma15041357. [PMID: 35207897 PMCID: PMC8875265 DOI: 10.3390/ma15041357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/04/2022] [Accepted: 02/10/2022] [Indexed: 11/17/2022]
Abstract
This work reports for the first time a quantum mechanical study of the interactions of a model benzodiazepine drug, i.e., nitrazepam, with various models of amorphous silica surfaces, differing in structural and interface properties. The interest in these systems is related to the use of mesoporous silica as carrier in drug delivery. The adopted computational procedure has been chosen to investigate whether silica–drug interactions favor the drug degradation mechanism or not, hindering the beneficial pharmaceutical effect. Computed structural, energetics, and vibrational properties represent a relevant comparison for future experiments. Our simulations demonstrate that adsorption of nitrazepam on amorphous silica is a strongly exothermic process in which a partial proton transfer from the surface to the drug is observed, highlighting a possible catalytic role of silica in the degradation reaction of benzodiazepines.
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58
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Brigiano FS, Gierada M, Tielens F, Pietrucci F. Mechanism and Free-Energy Landscape of Peptide Bond Formation at the Silica–Water Interface. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Flavio Siro Brigiano
- General Chemistry (ALGC), Materials Modeling Group, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium
| | - Maciej Gierada
- General Chemistry (ALGC), Materials Modeling Group, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, 31-155 Kraków, Poland
| | - Frederik Tielens
- General Chemistry (ALGC), Materials Modeling Group, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium
| | - Fabio Pietrucci
- Sorbonne Université, Muséum National d’Histoire Naturelle, UMR CNRS 7590, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, F-75005 Paris, France
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59
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The EXIMIOUS project—Mapping exposure-induced immune effects: connecting the exposome and the immunome. Environ Epidemiol 2022; 6:e193. [PMID: 35169671 PMCID: PMC8835560 DOI: 10.1097/ee9.0000000000000193] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 12/27/2021] [Indexed: 11/26/2022] Open
Abstract
Immune-mediated, noncommunicable diseases—such as autoimmune and inflammatory diseases—are chronic disorders, in which the interaction between environmental exposures and the immune system plays an important role. The prevalence and societal costs of these diseases are rising in the European Union. The EXIMIOUS consortium—gathering experts in immunology, toxicology, occupational health, clinical medicine, exposure science, epidemiology, bioinformatics, and sensor development—will study eleven European study populations, covering the entire lifespan, including prenatal life. Innovative ways of characterizing and quantifying the exposome will be combined with high-dimensional immunophenotyping and -profiling platforms to map the immune effects (immunome) induced by the exposome. We will use two main approaches that “meet in the middle”—one starting from the exposome, the other starting from health effects. Novel bioinformatics tools, based on systems immunology and machine learning, will be used to integrate and analyze these large datasets to identify immune fingerprints that reflect a person’s lifetime exposome or that are early predictors of disease. This will allow researchers, policymakers, and clinicians to grasp the impact of the exposome on the immune system at the level of individuals and populations.
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60
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Yang X, Lu D, Zhu B, Sun Z, Li G, Li J, Liu Q, Jiang G. Phase transformation of silica particles in coal and biomass combustion processes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118312. [PMID: 34627962 DOI: 10.1016/j.envpol.2021.118312] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 10/03/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
Inhalation of respirable silica particles can cause serious lung diseases (e.g., silicosis and lung cancer), and the toxicity of respirable silica is highly dependent on its crystal form. Common combustion processes such as coal and biomass burning can provide high temperature environments that may alter the crystal forms of silica and thus affect its toxic effects. Although crystalline silica (i.e., quartz, tridymite, and cristobalite) were widely found at different temperatures during the burning processes, the sources and crystal transformation pathways of silica in the burning processes are still not well understood. Here, we investigate the crystal transformation of silica in the coal and biomass combustion processes and clarify the detailed transformation pathways of silica for the first time. Specifically, in coal burning process, amorphous silica can transform into quartz and cristobalite starting at 1100 °C, and quartz transforms into cristobalite starting at 1200 °C; in biomass burning process, amorphous silica can transform into cristobalite starting at 800 °C, and cristobalite transforms into tridymite starting at 1000 °C. These transformation temperatures are significantly lower than those predicted by the classic theory due to possibly the catalysis of coexisting metal elements (e.g., aluminum, iron, and potassium). Our results not only enable a deeper understanding on the combustion-induced crystal transformation of silica, but also contribute to the mitigation of population exposure to respirable silica.
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Affiliation(s)
- Xuezhi Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Dawei Lu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Bao Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Zhendong Sun
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
| | - Gang Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Jie Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Qian Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China; Institute of Environment and Health, Jianghan University, Wuhan, 430056, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
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61
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Zhang W, Fan D, Yu Y. A DFT study of the aldol condensation reaction in the processing of ethanol to 1,3-butadiene on a MgO/SiO 2 surface. NEW J CHEM 2022. [DOI: 10.1039/d1nj04085e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ETB process on different sites of MgO/SiO2.
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Affiliation(s)
- Weiwei Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
| | - Dan Fan
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
| | - Yingzhe Yu
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
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62
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Nakamura S, Tsuji Y, Yoshizawa K. Molecular Dynamics Study on the Thermal Aspects of the Effect of Water Molecules at the Adhesive Interface on an Adhesive Structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14724-14732. [PMID: 34870994 DOI: 10.1021/acs.langmuir.1c02653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The presence of adsorbed water on hydrophilic solid surfaces should be taken into account, especially in humid environments. It significantly reduces the adhesive strength between the epoxy resin and the adherend surface. Here, the adhesion structure of interfacial water sandwiched between bisphenol A epoxy resin and a hydroxylated silica (001) surface is investigated with microsecond molecular dynamics simulations. Specifically, interfacial water layers with initial thicknesses of 7.5, 10, and 20 Å are modeled. The density curves of water and the diglycidyl ether of bisphenol A show that at room temperature, the surface of the silica with hydroxyl groups is completely covered with a thick layer of water. For water layers thinner than 10 Å, the density of epoxy resin on the silica surface increases when the system is heated and does not return to the original density when the system is cooled. Furthermore, calculation of the interaction energy revealed that the exclusion of water from the hydroxylated surface by epoxy resin during heating can contribute to the increase in the adhesive interaction between the epoxy resin and the silica surface with hydroxyl groups.
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Affiliation(s)
- Shin Nakamura
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuta Tsuji
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
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The Role of the pH in the Impregnation of Spherical Mesoporous Silica Particles with L-Arginine Aqueous Solutions. Int J Mol Sci 2021; 22:ijms222413403. [PMID: 34948206 PMCID: PMC8703690 DOI: 10.3390/ijms222413403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022] Open
Abstract
In the context of the development of carriers for amino acids delivery, Spherical Mesoporous Silica Particles (SMSP), characterized by particles size ranging from 0.15 µm to 0.80 µm and average pore diameter of 2.4 nm, were synthesised and loaded with L-arginine (ARG), a basic amino acid involved in several physiological processes. The loading was performed using water as a solvent through the wet impregnation method (with a final arginine content of 9.1% w/w). The material was characterized before and after impregnation by means of X-Ray Diffraction (XRD), nitrogen sorption analysis, Field Emission Scanning Electron Microscopy (FESEM) and Fourier Transform Infrared (FT-IR) spectroscopy. SMSP are shown to suffer degradation upon impregnation, which dramatically affects their porosity. To elucidate the role of the pH of the ARG impregnating solution (originally set at pH ≈ 11) on SMSP degradation, the loading was performed under different pH conditions (5 and 9) keeping constant the ARG concentration. The impregnation performed with acidic solution did not modify the carrier. All samples displayed ARG in amorphous form: zwitterionic species were present in SMSP impregnated at basic pH whereas positive protonated species in that impregnated at acidic pH.
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65
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Affiliation(s)
- Guido Raos
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via L. Mancinelli 7, I-20131 Milano, Italy
| | - Bruno Zappone
- Consiglio Nazionale delle Ricerche - Istituto di Nanotecnologia (CNR-Nanotec), Via P. Bucci, 33/C, 87036 Rende (CS), Italy
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66
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Pantaleone S, Rimola A, Ugliengo P, Sodupe M. First-Principles Modeling of Protein/Surface Interactions. Polyglycine Secondary Structure Adsorption on the TiO 2 (101) Anatase Surface Adopting a Full Periodic Approach. J Chem Inf Model 2021; 61:5484-5498. [PMID: 34752107 DOI: 10.1021/acs.jcim.1c00689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Computational modeling of protein/surface systems is challenging since the conformational variations of the protein and its interactions with the surface need to be considered at once. Adoption of first-principles methods to this purpose is overwhelming and computationally extremely expensive so that, in many cases, dramatically simplified systems (e.g., small peptides or amino acids) are used at the expenses of modeling nonrealistic systems. In this work, we propose a cost-effective strategy for the modeling of peptide/surface interactions at a full quantum mechanical level, taking the adsorption of polyglycine on the TiO2 (101) anatase surface as a test case. Our approach is based on applying the periodic boundary conditions for both the surface model and the polyglycine peptide, giving rise to full periodic polyglycine/TiO2 surface systems. By proceeding this way, the considered complexes are modeled with a drastically reduced number of atoms compared with the finite-analogous systems, modeling the polypeptide structures at the same time in a realistic way. Within our modeling approach, full periodic density functional theory calculations (including implicit solvation effects) and ab initio molecular dynamics (AIMD) simulations at the PBE-D2* theory level have been carried out to investigate the adsorption and relative stability of the different polyglycine structures (i.e., extended primary, β-sheet, and α-helix) on the TiO2 surface. It has been found that, upon adsorption, secondary structures become partially denatured because the peptide C═O groups form Ti-O═C dative bonds. AIMD simulations have been fundamental to identify these phenomena because thermal and entropic effects are of paramount importance. Irrespective of the simulated environments (gas phase and implicit solvent), adsorption of the α-helix is more favorable than that of the β-sheet because in the former, more Ti-O═C bonds are formed and the adsorbed secondary structure results less distorted with respect to the isolated state. Under the implicit water solvent, additionally, adsorbed β-sheet structures weaken with respect to their isolated states as the H-bonds between the strands are longer due to solvation effects. Accordingly, the results indicate that the preferred conformation upon adsorption is the α-helix over the β-sheet.
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Affiliation(s)
- Stefano Pantaleone
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Catalonia, Spain.,Dipartimento di Chimica and Nanostructured Interfaces and Surfaces (NIS) Inter-Departmental Centre, Università degli Studi di Torino, Via P. Giuria 7, Torino 10125, Italy.,Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, Perugia I-06123, Italy
| | - Albert Rimola
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Catalonia, Spain
| | - Piero Ugliengo
- Dipartimento di Chimica and Nanostructured Interfaces and Surfaces (NIS) Inter-Departmental Centre, Università degli Studi di Torino, Via P. Giuria 7, Torino 10125, Italy
| | - Mariona Sodupe
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Catalonia, Spain
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Miyagawa A, Nagatomo S, Kazami H, Terada T, Nakatani K. Kinetic Analysis of the Mass Transfer of Zinc Myoglobin in a Single Mesoporous Silica Particle by Confocal Fluorescence Microspectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:12697-12704. [PMID: 34672614 DOI: 10.1021/acs.langmuir.1c02127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The adsorption/desorption mechanisms of biomolecules in porous materials have attracted significant attention because of their applications in many fields, including environmental, medical, and industrial sciences. Here, we employ confocal fluorescence microspectroscopy to reveal the diffusion behavior of zinc myoglobin (ZnMb, 4.4 nm × 4.4 nm × 2.5 nm) as a spherical protein in a single mesoporous silica particle (pore size of 15 nm). The measurement of the time course of the fluorescence depth profile of the particle reveals that intraparticle diffusion is the rate-limiting process of ZnMb in the particle. The diffusion coefficients of ZnMb in the particle for the distribution (Ddis) and release (Dre) processes are determined from the rate constants, e.g., Ddis = 1.65 × 10-10 cm2 s-1 and Dre = 3.68 × 10-10 cm2 s-1, for a 10 mM buffer solution. The obtained D values for various buffer concentrations are analyzed using the pore and surface diffusion model. Although surface diffusion is the main distribution process, the release process involves pore and surface diffusion, which have not been observed with small organic molecules; the mechanism of transfer of small molecules is pore diffusion alone. We demonstrate that the mass transfer kinetics of ZnMb in the silica particle can be explained well on the basis of pore and surface diffusion.
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Affiliation(s)
- Akihisa Miyagawa
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Shigenori Nagatomo
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Hiroaki Kazami
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Takuto Terada
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Kiyoharu Nakatani
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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Criado-Reyes J, Bizzarri BM, García-Ruiz JM, Saladino R, Di Mauro E. The role of borosilicate glass in Miller-Urey experiment. Sci Rep 2021; 11:21009. [PMID: 34697338 PMCID: PMC8545935 DOI: 10.1038/s41598-021-00235-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 10/06/2021] [Indexed: 11/08/2022] Open
Abstract
We have designed a set of experiments to test the role of borosilicate reactor on the yielding of the Miller-Urey type of experiment. Two experiments were performed in borosilicate flasks, two in a Teflon flask and the third couple in a Teflon flask with pieces of borosilicate submerged in the water. The experiments were performed in CH4, N2, and NH3 atmosphere either buffered at pH 8.7 with NH4Cl or unbuffered solutions at pH ca. 11, at room temperature. The Gas Chromatography-Mass Spectroscopy results show important differences in the yields, the number of products, and molecular weight. In particular, a dipeptide, multi-carbon dicarboxylic acids, PAHs, and a complete panel of biological nucleobases form more efficiently or exclusively in the borosilicate vessel. Our results offer a better explanation of the famous Miller's experiment showing the efficiency of borosilicate in a triphasic system including water and the reduced Miller-Urey atmosphere.
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Affiliation(s)
- Joaquín Criado-Reyes
- Laboratorio de Estudios Cristalográficos, Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas, Universidad de Granada, Avenida de las Palmeras 4, Armilla, 18100, Granada, Spain
| | - Bruno M Bizzarri
- Ecological and Biological Sciences Department (DEB), University of Tuscia, Via S. Camillo de Lellis snc, 01100, Viterbo, Italy
| | - Juan Manuel García-Ruiz
- Laboratorio de Estudios Cristalográficos, Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas, Universidad de Granada, Avenida de las Palmeras 4, Armilla, 18100, Granada, Spain.
| | - Raffaele Saladino
- Ecological and Biological Sciences Department (DEB), University of Tuscia, Via S. Camillo de Lellis snc, 01100, Viterbo, Italy.
| | - Ernesto Di Mauro
- Ecological and Biological Sciences Department (DEB), University of Tuscia, Via S. Camillo de Lellis snc, 01100, Viterbo, Italy
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69
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Rauwolf S, Steegmüller T, Schwaminger SP, Berensmeier S. Purification of a peptide tagged protein via an affinity chromatographic process with underivatized silica. Eng Life Sci 2021; 21:549-557. [PMID: 34690628 PMCID: PMC8518568 DOI: 10.1002/elsc.202100019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/06/2021] [Accepted: 05/25/2021] [Indexed: 11/11/2022] Open
Abstract
Silica is widely used for chromatography resins due to its high mechanical strength, column efficiency, easy manufacturing (i.e. controlled size and porosity), and low-cost. Despite these positive attributes to silica, it is currently used as a backbone for chromatographic resins in biotechnological downstream processing. The aim of this study is to show how the octapeptide (RH)4 can be used as peptide tag for high-purity protein purification on bare silica. The tag possesses a high affinity to deprotonated silanol groups because the tag's arginine groups interact with the surface via an ion pairing mechanism. A chromatographic workflow to purify GFP fused with (RH)4 could be implemented. Purities were determined by SDS-PAGE and RP-HPLC. The equilibrium binding capacity of the fusion protein GFP-(RH)4 on silica is 450 mg/g and the dynamic binding capacity around 3 mg/mL. One-step purification from clarified lysate achieved a purity of 93% and a recovery of 94%. Overloading the column enhances the purity to >95%. Static experiments with different buffers showed variability of the method making the system independent from buffer choice. Our designed peptide tag allows bare silica to be utilized in preparative chromatography for downstream bioprocessing; thus, providing a cost saving factor regarding expensive surface functionalization. Underivatized silica in combination with our (RH)4 peptide tag allows the purification of proteins, in all scales, without relying on complex resins.
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Affiliation(s)
- Stefan Rauwolf
- Department of Mechanical EngineeringTechnical University of MunichMunichGermany
| | - Tobias Steegmüller
- Department of Mechanical EngineeringTechnical University of MunichMunichGermany
| | | | - Sonja Berensmeier
- Department of Mechanical EngineeringTechnical University of MunichMunichGermany
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70
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Deng Y, Wu Q, Li Z, Huang X, Rao S, Liang Y, Lu H. Crystal face dependent wettability of α-quartz: Elucidation by time-of-flight secondary ion mass spectrometry techniques combined with molecular dynamics. J Colloid Interface Sci 2021; 607:1699-1708. [PMID: 34592555 DOI: 10.1016/j.jcis.2021.09.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/26/2021] [Accepted: 09/08/2021] [Indexed: 11/30/2022]
Abstract
HYPOTHESIS Quartz is one of the most common but important minerals, and its wettability plays a significant role in affecting various natural and industrial processes. Studies have revealed that different crystal faces of quartz are with different wettabilities, but its mechanism is still vague. EXPERIMENTS AND SIMULATIONS For specifying the mechanism of crystal face dependent wettability, the contact angles of three different liquids on the crystal faces of α-quartz are measured; the time-of-flight secondary ion mass spectrometry (ToF-SIMS) is employed to establish the crystal surface models; molecular dynamics (MD) simulations with the surface models are performed to understand the wetting behavior at molecular scale. FINDINGS Based on the contact angle measurements, the wettabilities of different crystal faces of α-quartz are found different, which can be directly attributed to the concentration of hydroxyl group on crystal faces based on ToF-SIMS results. MD simulations yield consistent results with the contact angle order recognized from experiments, revealing that the surface hydroxyl group controls the wettability of α-quartz crystal faces. It is also recognized that the pristine surface atomic arrangement, especially the surface concentration of unsaturated bond (an intrinsic property of α-quartz), is the intrinsic cause of the difference in the concentration of hydroxyl group of the crystal surface.
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Affiliation(s)
- Yajun Deng
- Beijing International Center for Gas Hydrate, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China; College of Engineering, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China; Department of Mechanical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China.
| | - Qianhong Wu
- Beijing International Center for Gas Hydrate, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China; School of Physics, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China.
| | - Zhenchao Li
- Beijing International Center for Gas Hydrate, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China; School of Earth and Space Sciences, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China.
| | - Xin Huang
- Beijing International Center for Gas Hydrate, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China; College of Engineering, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China.
| | - Shihang Rao
- Beijing International Center for Gas Hydrate, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China; College of Engineering, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China.
| | - Yunfeng Liang
- Department of Systems Innovation, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Hailong Lu
- Beijing International Center for Gas Hydrate, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China; School of Earth and Space Sciences, Peking University, No.5 Yiheyuan Road Haidian District, Beijing 100871, China.
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71
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Rauwolf S, Bag S, Rouqueiro R, Schwaminger SP, Dias-Cabral AC, Berensmeier S, Wenzel W. Insights on Alanine and Arginine Binding to Silica with Atomic Resolution. J Phys Chem Lett 2021; 12:9384-9390. [PMID: 34551250 DOI: 10.1021/acs.jpclett.1c02398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Interactions of biomolecules with inorganic oxide surfaces such as silica in aqueous solutions are of profound interest in various research fields, including chemistry, biotechnology, and medicine. While there is a general understanding of the dominating electrostatic interactions, the binding mechanism is still not fully understood. Here, chromatographic zonal elution and flow microcalorimetry experiments were combined with molecular dynamic simulations to describe the interaction of different capped amino acids with the silica surface. We demonstrate that ion pairing is the dominant electrostatic interaction. Surprisingly, the interaction strength is more dependent on the repulsive carboxy group than on the attracting amino group. These findings are essential for conducting experimental and simulative studies on amino acids when transferring the results to biomolecule-surface interactions.
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Affiliation(s)
- Stefan Rauwolf
- Department Mechanical Engineering, Bioseparation Engineering Group, Technical University of Munich, Boltzmannstrasse 15, 85748 Garching, Germany
| | - Saientan Bag
- Institute for Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Rodrigo Rouqueiro
- Department of Chemistry, CICS-UBI Health Science Research Center, University Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Sebastian Patrick Schwaminger
- Department Mechanical Engineering, Bioseparation Engineering Group, Technical University of Munich, Boltzmannstrasse 15, 85748 Garching, Germany
| | - Ana Cristina Dias-Cabral
- Department of Chemistry, CICS-UBI Health Science Research Center, University Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Sonja Berensmeier
- Department Mechanical Engineering, Bioseparation Engineering Group, Technical University of Munich, Boltzmannstrasse 15, 85748 Garching, Germany
| | - Wolfgang Wenzel
- Institute for Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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72
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Chen CH, Mentink-Vigier F, Trébosc J, Goldberga I, Gaveau P, Thomassot E, Iuga D, Smith ME, Chen K, Gan Z, Fabregue N, Métro TX, Alonso B, Laurencin D. Labeling and Probing the Silica Surface Using Mechanochemistry and 17 O NMR Spectroscopy*. Chemistry 2021; 27:12574-12588. [PMID: 34131984 PMCID: PMC8410671 DOI: 10.1002/chem.202101421] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Indexed: 01/21/2023]
Abstract
In recent years, there has been increasing interest in developing cost‐efficient, fast, and user‐friendly 17O enrichment protocols to help to understand the structure and reactivity of materials by using 17O NMR spectroscopy. Here, we show for the first time how ball milling (BM) can be used to selectively and efficiently enrich the surface of fumed silica, which is widely used at industrial scale. Short milling times (up to 15 min) allowed modulation of the enrichment level (up to ca. 5 %) without significantly changing the nature of the material. High‐precision 17O compositions were measured at different milling times by using large‐geometry secondary‐ion mass spectrometry (LG‐SIMS). High‐resolution 17O NMR analyses (including at 35.2 T) allowed clear identification of the signals from siloxane (Si−O−Si) and silanols (Si−OH), while DNP analyses, performed by using direct 17O polarization and indirect 17O{1H} CP excitation, agreed with selective labeling of the surface. Information on the distribution of Si−OH environments at the surface was obtained from 2D 1H−17O D‐HMQC correlations. Finally, the surface‐labeled silica was reacted with titania and using 17O DNP, their common interface was probed and Si−O−Ti bonds identified.
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Affiliation(s)
- Chia-Hsin Chen
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | - Frederic Mentink-Vigier
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL, USA
| | - Julien Trébosc
- Univ. Lille, CNRS, INRAE, Centrale Lille, Univ. Artois, FR 2638 - IMEC - Institut Michel-Eugène Chevreul, 59000, Lille, France
| | - Ieva Goldberga
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Emilie Thomassot
- Université de Lorraine, CRPG, CNRS UMR 7358, Vandœuvre-lès-Nancy, France
| | - Dinu Iuga
- Department of Physics, University of Warwick, CV4 7AL, Coventry, UK
| | - Mark E Smith
- Vice-Chancellor's Office and Department of Chemistry, Highfield Campus, University of Southampton, SO17 1BJ, Southampton, UK
| | - Kuizhi Chen
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL, USA
| | - Zhehong Gan
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL, USA
| | | | | | - Bruno Alonso
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
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73
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Yan C, Datta Sarma A, Moretto E, Thomann JS, Verge P, Schmidt D, Kayser F, Dieden R. Semiquantitative Solid-State NMR Study of the Adsorption of Soybean Oils on Silica and Its Significance for Rubber Processing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10298-10307. [PMID: 34406773 DOI: 10.1021/acs.langmuir.1c01280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Soybean oil (SBO) is a renewable material used as an alternative to conventional petroleum-derived oils in the processing of rubber composites. Upon chemical modifications, such as epoxidation, its performance in the processing of rubber can be significantly improved, as indicated by a considerable reduction of the mixing energy. Although it has been hypothesized that hydrogen bonding between functional groups (e.g., epoxy) of SBOs and silanols present on the silica surface plays a key role, there is still a lack of direct evidence supporting this hypothesis. In this work, it is demonstrated that there is an overall correlation between the epoxy concentration of SBOs and the mixing energy, consistent with the long-held hypothesis. In particular, a correlation between the SBO-silica adsorption affinity and the degree of epoxidation is revealed by a set of surface-selective solid-state nuclear magnetic resonance (ssNMR) experiments. In addition, the surface-selective ssNMR technique demonstrated in this work could also be used to evaluate the adsorption affinity of other oils and/or additives more broadly.
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Affiliation(s)
- Chuanyu Yan
- Department of "Materials Research and Technology", Luxembourg Institute of Science and Technology, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, Avenue des Hauts-Fourneaux, L-4365 Esch-sur-Alzette, Luxembourg
| | - Arpan Datta Sarma
- Department of "Materials Research and Technology", Luxembourg Institute of Science and Technology, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, Avenue des Hauts-Fourneaux, L-4365 Esch-sur-Alzette, Luxembourg
| | - Enzo Moretto
- Department of "Materials Research and Technology", Luxembourg Institute of Science and Technology, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, Avenue des Hauts-Fourneaux, L-4365 Esch-sur-Alzette, Luxembourg
| | - Jean-Sébastien Thomann
- Department of "Materials Research and Technology", Luxembourg Institute of Science and Technology, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
| | - Pierre Verge
- Department of "Materials Research and Technology", Luxembourg Institute of Science and Technology, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
| | - Daniel Schmidt
- Department of "Materials Research and Technology", Luxembourg Institute of Science and Technology, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
| | - François Kayser
- Goodyear Innovation Center Luxembourg, Avenue Gordon Smith, L-7750 Colmar Berg, Luxembourg
| | - Reiner Dieden
- Department of "Materials Research and Technology", Luxembourg Institute of Science and Technology, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
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74
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Influence of the chain length of the fatty acids present in different oils and the pore diameter of the support on the catalytic activity of immobilized lipase for ethyl ester production. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2021. [DOI: 10.1007/s43153-021-00132-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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75
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Ali RF, Guo I, Kang H, Radford MJ, Yapp DT, Gates BD. Tuning the Surface Chemistry of Second-Harmonic-Active Lithium Niobate Nanoprobes Using a Silanol-Alcohol Condensation Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:7689-7700. [PMID: 34128677 DOI: 10.1021/acs.langmuir.1c00645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The surface functionalization of nanoparticles (NPs) is of great interest for improving the use of NPs in, for example, therapeutic and diagnostic applications. The conjugation of specific molecules with NPs through the formation of covalent linkages is often sought to provide a high degree of colloidal stability and biocompatibility, as well as to provide functional groups for further surface modification. NPs of lithium niobate (LiNbO3) have been explored for use in second-harmonic-generation (SHG)-based bioimaging, expanding the applications of SHG-based microscopy techniques. The efficient use of SHG-active LiNbO3 NPs as probes will, however, require the functionalization of their surfaces with molecular reagents such as polyethylene glycol and fluorescent molecules to enhance their colloidal and chemical stability and to enable a correlative imaging platform. Herein, we demonstrate the surface functionalization of LiNbO3 NPs through the covalent attachment of alcohol-based reagents through a silanol-alcohol condensation reaction. Alcohol-based reagents are widely available and can have a range of terminal functional groups such as carboxylic acids, amines, and aldehydes. Attaching these molecules to NPs through the silanol-alcohol condensation reaction could diversify the reagents available to modify NPs, but this reaction pathway must first be established as a viable route to modifying NPs. This study focuses on the attachment of a linear alcohol functionalized with carboxylic acid and its use as a reactive group to further tune the surface chemistry of LiNbO3 NPs. These carboxylic acid groups were reacted to covalently attach other molecules to the NPs using copper-free click chemistry. This derivatization of the NPs provided a means to covalently attach polyethylene glycols and fluorescent probes to the NPs, reducing NP aggregation and enabling multimodal tracking of SHG nanoprobes, respectively. This extension of the silanol-alcohol condensation reaction to functionalize the surfaces of LiNbO3 NPs can be extended to other types of nanoprobes for use in bioimaging, biosensing, and photodynamic therapies.
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Affiliation(s)
- Rana Faryad Ali
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Iris Guo
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Henry Kang
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Melissa J Radford
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Donald T Yapp
- British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver BC V5Z 1L3, Canada
| | - Byron D Gates
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
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76
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de Azambuja F, Loosen A, Conic D, van den Besselaar M, Harvey JN, Parac-Vogt TN. En Route to a Heterogeneous Catalytic Direct Peptide Bond Formation by Zr-Based Metal–Organic Framework Catalysts. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01782] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Alexandra Loosen
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Dragan Conic
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | | | - Jeremy N. Harvey
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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77
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Wang R, Klein ML, Carnevale V, Borguet E. Investigations of water/oxide interfaces by molecular dynamics simulations. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2021. [DOI: 10.1002/wcms.1537] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ruiyu Wang
- Department of Chemistry Temple University Philadelphia Pennsylvania USA
- Center for Complex Materials from First Principles (CCM) Temple University Philadelphia Pennsylvania USA
| | - Michael L. Klein
- Department of Chemistry Temple University Philadelphia Pennsylvania USA
- Center for Complex Materials from First Principles (CCM) Temple University Philadelphia Pennsylvania USA
- Institute for Computational Molecular Science, Temple University Philadelphia Pennsylvania USA
| | - Vincenzo Carnevale
- Institute for Computational Molecular Science, Temple University Philadelphia Pennsylvania USA
- Department of Biology Temple University Philadelphia Pennsylvania USA
| | - Eric Borguet
- Department of Chemistry Temple University Philadelphia Pennsylvania USA
- Center for Complex Materials from First Principles (CCM) Temple University Philadelphia Pennsylvania USA
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78
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Bauer F, Meyer R, Bertmer M, Naumov S, Al-Naji M, Wissel J, Steinhart M, Enke D. Silanization of siliceous materials, part 3: Modification of surface energy and acid-base properties of silica nanoparticles determined by inverse gas chromatography (IGC). Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126472] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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79
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Bag S, Rauwolf S, Schwaminger SP, Wenzel W, Berensmeier S. DNA Binding to the Silica: Cooperative Adsorption in Action. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5902-5908. [PMID: 33951395 DOI: 10.1021/acs.langmuir.1c00381] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The adsorption and desorption of nucleic acid to a solid surface is ubiquitous in various research areas like pharmaceutics, nanotechnology, molecular biology, and molecular electronics. In spite of this widespread importance, it is still not well understood how the negatively charged deoxyribonucleic acid (DNA) binds to the negatively charged silica surface in an aqueous solution. In this article, we study the adsorption of DNA to the silica surface using both modeling and experiments and shed light on the complicated binding (DNA to silica) process. The binding agent mediated DNA adsorption was elegantly captured by cooperative Langmuir model. Bulk-depletion experiments were performed to conclude the necessity of a positively charged binding agent for efficient DNA binding, which complements the findings from the model. A profound understanding of DNA binding will help to tune various processes for efficient nucleic acid extraction and purification. However, this work goes beyond the DNA binding and can shed light on other binding agent mediated surface-surface, surface-molecule, molecule-molecule interaction.
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Affiliation(s)
- Saientan Bag
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz-1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Stefan Rauwolf
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich (TUM), Munich 85748, Germany
| | - Sebastian P Schwaminger
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich (TUM), Munich 85748, Germany
| | - Wolfgang Wenzel
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz-1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Sonja Berensmeier
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich (TUM), Munich 85748, Germany
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80
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Praveen CS, Borosy AP, Copéret C, Comas-Vives A. Strain in Silica-Supported Ga(III) Sites: Neither Too Much nor Too Little for Propane Dehydrogenation Catalytic Activity. Inorg Chem 2021; 60:6865-6874. [PMID: 33545002 PMCID: PMC8483445 DOI: 10.1021/acs.inorgchem.0c03135] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Well-defined Ga(III) sites on SiO2 are highly active, selective, and stable catalysts in the propane dehydrogenation (PDH) reaction. In this contribution, we evaluate the catalytic activity toward PDH of tricoordinated and tetracoordinated Ga(III) sites on SiO2 by means of first-principles calculations using realistic amorphous periodic SiO2 models. We evaluated the three reaction steps in PDH, namely, the C-H activation of propane to form propyl, the β-hydride (β-H) transfer to form propene and a gallium hydride, and the H-H coupling to release H2, regenerating the initial Ga-O bond and closing the catalytic cycle. Our work shows how Brønsted-Evans-Polanyi relationships are followed to a certain extent for these three reaction steps on Ga(III) sites on SiO2 and highlights the role of the strain of the reactive Ga-O pairs on such sites of realistic amorphous SiO2 models. It also shows how transition-state scaling holds very well for the β-H transfer step. While highly strained sites are very reactive sites for the initial C-H activation, they are more difficult to regenerate. The corresponding less strained sites are not reactive enough, pointing to the need for the right balance in strain to be an effective site for PDH. Overall, our work provides an understanding of the intrinsic activity of acidic Ga single sites toward the PDH reaction and paves the way toward the design and prediction of better single-site catalysts on SiO2 for the PDH reaction.
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Affiliation(s)
- C S Praveen
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - A P Borosy
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - C Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - A Comas-Vives
- Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
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81
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Ece MŞ. Synthesis and characterization of activated carbon supported magnetic nanoparticles (Fe O4/AC@SiO @Sulfanilamide) and its application in removal of toluene and benzene. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126231] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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82
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Green Production of Cladribine by Using Immobilized 2'-Deoxyribosyltransferase from Lactobacillus delbrueckii Stabilized through a Double Covalent/Entrapment Technology. Biomolecules 2021; 11:biom11050657. [PMID: 33947162 PMCID: PMC8146660 DOI: 10.3390/biom11050657] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 12/12/2022] Open
Abstract
Nowadays, enzyme-mediated processes offer an eco-friendly and efficient alternative to the traditional multistep and environmentally harmful chemical processes. Herein we report the enzymatic synthesis of cladribine by a novel 2'-deoxyribosyltransferase (NDT)-based combined biocatalyst. To this end, Lactobacillus delbrueckii NDT (LdNDT) was successfully immobilized through a two-step immobilization methodology, including a covalent immobilization onto glutaraldehyde-activated biomimetic silica nanoparticles followed by biocatalyst entrapment in calcium alginate. The resulting immobilized derivative, SiGPEI 25000-LdNDT-Alg, displayed 98% retained activity and was shown to be active and stable in a broad range of pH (5-9) and temperature (30-60 °C), but also displayed an extremely high reusability (up to 2100 reuses without negligible loss of activity) in the enzymatic production of cladribine. Finally, as a proof of concept, SiGPEI 25000-LdNDT-Alg was successfully employed in the green production of cladribine at mg scale.
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83
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Gallo M, Serpella L, Leone F, Manna L, Banchero M, Ronchetti S, Onida B. Piroxicam Loading onto Mesoporous Silicas by Supercritical CO 2 Impregnation. Molecules 2021; 26:molecules26092500. [PMID: 33922927 PMCID: PMC8123285 DOI: 10.3390/molecules26092500] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/16/2021] [Accepted: 04/22/2021] [Indexed: 11/16/2022] Open
Abstract
Piroxicam (PRX) is a commonly prescribed nonsteroidal anti-inflammatory drug. Its efficacy, however, is partially limited by its low water solubility. In recent years, different studies have tackled this problem and have suggested delivering PRX through solid dispersions. All these strategies, however, involve the use of potentially harmful solvents for the loading procedure. Since piroxicam is soluble in supercritical CO2 (scCO2), the present study aims, for the first time, to adsorb PRX onto mesoporous silica using scCO2, which is known to be a safer and greener technique compared to the organic solvent-based ones. For comparison, PRX is also loaded by adsorption from solution and incipient wetness impregnation using ethanol as solvent. Two different commercial mesoporous silicas are used (SBA-15 and Grace Syloid® XDP), which differ in porosity order and surface silanol population. Physico-chemical analyses show that the most promising results are obtained through scCO2, which yields the amorphization of PRX, whereas some crystallization occurs in the case of adsorption from solution and IWI. The highest loading of PRX by scCO2 is obtained in SBA-15 (15 wt.%), where molecule distribution appears homogeneous, with very limited pore blocking.
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84
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Yamada SA, Hung ST, Shin JY, Fayer MD. Complex Formation and Dissociation Dynamics on Amorphous Silica Surfaces. J Phys Chem B 2021; 125:4566-4581. [DOI: 10.1021/acs.jpcb.1c01225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Steven A. Yamada
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Samantha T. Hung
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jae Yoon Shin
- Department of Advanced Materials Chemistry, Korea University, Sejong, Korea
| | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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85
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Ricardi NC, Arenas LT, Benvenutti EV, Hinrichs R, Flores EEE, Hertz PF, Costa TMH. High performance biocatalyst based on β-d-galactosidase immobilized on mesoporous silica/titania/chitosan material. Food Chem 2021; 359:129890. [PMID: 33934029 DOI: 10.1016/j.foodchem.2021.129890] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 03/18/2021] [Accepted: 04/10/2021] [Indexed: 12/20/2022]
Abstract
A new support for the immobilization of β-d-galactosidase from Kluyveromyces lactis was developed, consisting of mesoporous silica/titania with a chitosan coating. This support presents a high available surface area and adequate pore size for optimizing the immobilization efficiency of the enzyme and, furthermore, maintaining its activity. The obtained supported biocatalyst was applied in enzyme hydrolytic activity tests with o-NPG, showing high activity 1223 Ug-1, excellent efficiency (74%), and activity recovery (54%). Tests of lactose hydrolysis in a continuous flow reactor showed that during 14 days operation, the biocatalyst maintained full enzymatic activity. In a batch system, after 15 cycles, it retained approximately 90% of its initial catalytic activity and attained full conversion of the lactose 100% (±12%). Additionally, with the use of the mesoporous silica/titania support, the biocatalyst presented no deformation and fragmentation, in both systems, demonstrating high operational stability and appropriate properties for applications in food manufacturing.
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Affiliation(s)
| | - Leliz Ticona Arenas
- Instituto de Química (IQ), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Edilson Valmir Benvenutti
- Instituto de Química (IQ), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Ruth Hinrichs
- Instituto de Geociências (IGEO), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Elí Emanuel Esparza Flores
- Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Plinho Francisco Hertz
- Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Tania Maria Haas Costa
- Instituto de Química (IQ), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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86
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Khan K, Khan H, Siraj-ud-Din M, Salman SM. Preparation of silica nanoparticles facilitated by Saccharum munja plant. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2020.1799395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Khyrullah Khan
- Department of Chemistry, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
| | - Hizbullah Khan
- Department of Chemistry, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Siraj-ud-Din
- Department of Chemistry, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
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87
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Santermans S, Schanovsky F, Gupta M, Hellings G, Heyns M, Van Roy W, Martens K. The Significance of Nonlinear Screening and the pH Interference Mechanism in Field-Effect Transistor Molecular Sensors. ACS Sens 2021; 6:1049-1056. [PMID: 33496586 DOI: 10.1021/acssensors.0c02285] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electrolyte screening is well known for its detrimental impact on the sensitivity of liquid-gated field-effect transistor (FET) molecular sensors and is mostly described by the linearized Debye-Hückel model. However, charged and pH-sensitive FET sensing surfaces can limit the FET molecular sensitivity beyond the Debye-Hückel screening formalism. Pre-existing surface charges can lead to the breakdown of Debye-Hückel screening and induce enhanced nonlinear Poisson-Boltzmann screening. Moreover, the charging of the pH-sensitive surface groups interferes with biomolecule sensing resulting in a pH interference mechanism. With analytical equations and TCAD simulations, we highlight that the Debye-Hückel approximation can underestimate screening and overestimate FET molecular sensitivity by more than an order of magnitude. Screening strengthens significantly beyond Debye-Hückel in the proximity of even moderately charged surfaces and biomolecule charge densities (≥1 × 1012 q/cm2). We experimentally show the strong impact of both nonlinear screening and the pH interference effect on charge-based biomolecular sensing using a model system based on the covalent binding of single-stranded DNA on silicon FET sensors. The DNA signal increases from 24 mV at pH 7 to 96 mV at pH 3 in 1.5 mM PBS for a DNA density of 7 × 1012 DNA/cm2. Our model quantitatively explains the signal's pH dependence with roughly equal nonlinear screening and pH interference contributions. This work shows the importance of reducing the net charge and the pH sensitivity of the sensing surface to improve molecular sensing. Therefore, tailoring the gate dielectric and functional layer of FET sensors is a promising route to strong silicon FET molecular sensitivity boosts.
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Affiliation(s)
- Sybren Santermans
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
- Department of Materials Engineering, University of Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium
| | - Franz Schanovsky
- Global TCAD Solutions GmbH, Bösendorferstraße 1/12, 1010 Wien, Austria
| | - Mihir Gupta
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
- Department of Physics and Astronomy, University of Leuven, Celestijnenlaan 200d, 3001 Leuven, Belgium
| | | | - Marc Heyns
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
- Department of Materials Engineering, University of Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium
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88
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Smirnov KS. Structure and sum-frequency generation spectra of water on neutral hydroxylated silica surfaces. Phys Chem Chem Phys 2021; 23:6929-6949. [PMID: 33729227 DOI: 10.1039/d0cp06465c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural organization and vibrational sum-frequency generation (VSFG) spectra of water on crystalline and amorphous neutral silica surfaces were investigated by classical molecular dynamics simulations. The liquid phase represented with neat water and 1 M NaCl solution was analysed in terms of bonded interfacial layer (BIL), diffuse layer (DL) and bulk region. The simulations show that the structure of BIL depends on the surface morphology and density of surface OH groups. The water-silanol H-bond network and BIL structure are mainly insensitive to the presence of ions in the liquid phase. Molecules in DL of SiO2/neat water interfaces preferentially orient their OH bonds towards the surfaces. This effect is directly related to an effective negative charge of formally neutral surfaces. Ions of the electrolyte solution affect the intermolecular structure in DL by screening the surface electric field and by the chaotropic effect. Calculated phase-sensitive VSFG (Im[χ(2)]) spectrum of BIL features low-frequency negative and high-frequency positive bands. Characteristics of the positive band reflect the strength of water-surface interactions and surface crystallinity, while the position and shape of the negative band are common to all interfaces. The Im[χ(2)] spectrum of DL is dominated by a contribution from the third-order χ(3) susceptibility with the sign of the contribution directly related to the sign of electrostatic potential in the interfacial region. The DL spectrum is strongly affected by the presence of solvated ions. The computed intensity and Im[χ(2)] spectra of the amorphous silica/NaCl solution interface are in a good agreement with the conventional and phase-sensitive experimental VSFG spectra of fused SiO2/water system at low pH, in contrast to the spectra of the amorphous silica/neat water interface. Origins of the discrepancy are discussed.
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Affiliation(s)
- Konstantin S Smirnov
- Univ. Lille, CNRS, UMR 8516 - LASIRe - Laboratoire Avancé de Spectroscopie pour les Interactions la Réactivité et l'Environnement, F-59000 Lille, France.
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89
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Alegre CIA, Cazula BB, Alves HJ, Zalazar MF, Peruchena NM. The key role of adsorbate-catalyst interactions into catalytic activity of [CTA+]-Si-MCM-41 from electron density analysis. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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90
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Climent E, Hecht M, Rurack K. Loading and Release of Charged and Neutral Fluorescent Dyes into and from Mesoporous Materials: A Key Role for Sensing Applications. MICROMACHINES 2021; 12:mi12030249. [PMID: 33671037 PMCID: PMC7997199 DOI: 10.3390/mi12030249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 12/12/2022]
Abstract
The aim of this study is to determine the efficiency of loading and release of several zwitterionic, neutral, anionic and cationic dyes into/from mesoporous nanoparticles to find the optimum loading and release conditions for their application in detection protocols. The loading is carried out for MCM-41 type silica supports suspended in phosphate-buffered saline (PBS) buffer (pH 7.4) or in acetonitrile, involving the dyes (rhodamine B chloride, rhodamine 101 chloride, rhodamine 101 perchlorate, rhodamine 101 inner salt, meso-(4-hydroxyphenyl)-boron–dipyrromethene (BODIPY), sulforhodamine B sodium salt and fluorescein 27). As a general trend, rhodamine-based dyes are loaded with higher efficiency, when compared with BODIPY and fluorescein dyes. Between the rhodamine-based dyes, their charge and the solvent in which the loading process is carried out play important roles for the amount of cargo that can be loaded into the materials. The delivery experiments carried out in PBS buffer at pH 7.4 reveal for all the materials that anionic dyes are more efficiently released compared to their neutral or cationic counterparts. The overall best performance is achieved with the negatively charged sulforhodamine B dye in acetonitrile. This material also shows a high delivery degree in PBS buffer.
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Affiliation(s)
- Estela Climent
- Bundesanstalt für Materialforschung und Prüfung (BAM), Richard-Willstätter-Str. 11, 12489 Berlin, Germany; (M.H.); (K.R.)
- Correspondence:
| | - Mandy Hecht
- Bundesanstalt für Materialforschung und Prüfung (BAM), Richard-Willstätter-Str. 11, 12489 Berlin, Germany; (M.H.); (K.R.)
- CodeCheck GmbH, Gneisenaustraße 115, 10961 Berlin, Germany
| | - Knut Rurack
- Bundesanstalt für Materialforschung und Prüfung (BAM), Richard-Willstätter-Str. 11, 12489 Berlin, Germany; (M.H.); (K.R.)
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91
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Zhang Z, Ispas S, Kob W. Roughness and Scaling Properties of Oxide Glass Surfaces at the Nanoscale. PHYSICAL REVIEW LETTERS 2021; 126:066101. [PMID: 33635714 DOI: 10.1103/physrevlett.126.066101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Using atomistic computer simulations we determine the roughness and topographical features of melt-formed (MS) and fracture surfaces (FS) of oxide glasses. We find that the topography of the MS is described well by the frozen capillary wave theory. The FS are significant rougher than the MS and depend strongly on glass composition. The height-height correlation function for the FS shows an unexpected logarithmic dependence on distance, in contrast to the power law found in experiments. We unravel the crucial role of spatial resolution on surface measurements and conclude that on length scales less than 10 nm FS are not self-affine fractals.
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Affiliation(s)
- Zhen Zhang
- Laboratoire Charles Coulomb (L2C), University of Montpellier and CNRS, F-34095 Montpellier, France
- Center for Alloy Innovation and Design, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Simona Ispas
- Laboratoire Charles Coulomb (L2C), University of Montpellier and CNRS, F-34095 Montpellier, France
| | - Walter Kob
- Laboratoire Charles Coulomb (L2C), University of Montpellier and CNRS, F-34095 Montpellier, France
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92
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Manning JH, Walkley B, Provis JL, Patwardhan SV. Mimicking Biosintering: The Identification of Highly Condensed Surfaces in Bioinspired Silica Materials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:561-568. [PMID: 33372796 PMCID: PMC7815198 DOI: 10.1021/acs.langmuir.0c03261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Interfacial interactions between inorganic surfaces and organic additives are vital to develop new complex nanomaterials. Learning from biosilica materials, composite nanostructures have been developed, which exploit the strength and directionality of specific polyamine additive-silica surface interactions. Previous interpretations of these interactions are almost universally based on interfacial charge matching and/or hydrogen bonding. In this study, we analyzed the surface chemistry of bioinspired silica (BIS) materials using solid-state nuclear magnetic resonance (NMR) spectroscopy as a function of the organic additive concentration. We found significant additional association between the additives and fully condensed (Q4) silicon species compared to industrial silica materials, leading to more overall Q4 concentration and higher hydrothermal stability, despite BIS having a shorter synthesis time. We posit that the polyfunctionality and catalytic activity of additives in the BIS synthesis lead to both of these surface phenomena, contrasting previous studies on monofunctional surfactants used in most other artificial templated silica syntheses. From this, we propose that additive polyfunctionality can be used to generate tailored artificial surfaces in situ and provide insights into the process of biosintering in biosilica systems, highlighting the need for more in-depth simulations on interfacial interactions at silica surfaces.
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Affiliation(s)
- Joseph
R. H. Manning
- Department
of Chemical and Biological Engineering, The University of Sheffield, Sheffield S1 3JD, U.K.
- Department
of Chemical Engineering, The University
of Bath, Bath BA2 7AY, U.K.
- Department
of Chemistry, University College London, London WC1E 6BT, U.K.
| | - Brant Walkley
- Department
of Chemical and Biological Engineering, The University of Sheffield, Sheffield S1 3JD, U.K.
- Department
of Materials Science and Engineering, The
University of Sheffield, Sheffield S1 3JD, U.K.
| | - John L. Provis
- Department
of Materials Science and Engineering, The
University of Sheffield, Sheffield S1 3JD, U.K.
| | - Siddharth V. Patwardhan
- Department
of Chemical and Biological Engineering, The University of Sheffield, Sheffield S1 3JD, U.K.
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93
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Kane AQ, Esper AM, Searles K, Ehm C, Veige AS. Probing β-alkyl elimination and selectivity in polyolefin hydrogenolysis through DFT. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01088c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A long chain substrate with [(SiO)3ZrH] has been investigated to elucidate selectivity rules in β-alkyl elimination. DFT studies indicate that polypropylene preferentially undergoes β-Me elimination.
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Affiliation(s)
- Alexander Q. Kane
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA
| | - Alec M. Esper
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA
| | - Keith Searles
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA
| | - Christian Ehm
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
| | - Adam S. Veige
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA
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94
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Xie M, Brüschweiler R. Degree of N-Methylation of Nucleosides and Metabolites Controls Binding Affinity to Pristine Silica Surfaces. J Phys Chem Lett 2020; 11:10401-10407. [PMID: 33252225 DOI: 10.1021/acs.jpclett.0c02888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Biological molecules interact with silica (SiO2) surfaces with binding affinities that greatly vary depending on their physical-chemical properties. However, the quantitative characterization of biological compounds adsorbed on silica surfaces, especially of compounds involved in fast, reversible interactions, has been challenging, and the driving forces are not well understood. Here, we show how carbon-13 NMR spin relaxation provides quantitative atomic-detail information about the transient molecular binding to pristine silica surfaces, represented by colloidally dispersed silica nanoparticles (SNPs). Based on the quantitative analysis of almost two dozen biological molecules, we find that the addition of N-methyl motifs systematically increases molecular binding affinities to silica in a nearly quantitatively predictable manner. Among the studied compounds are methylated nucleosides, which are common in epigenetic signaling in nucleic acids. The quantitative understanding of N-methylation may open up new ways to detect and separate methylated nucleic acids or even regulate their cellular functions.
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Affiliation(s)
- Mouzhe Xie
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43212, United States
| | - Rafael Brüschweiler
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43212, United States
- The Campus Chemical Instrument Center, The Ohio State University, Columbus, Ohio 43212, United States
- Department of Biological Chemistry and Pharmacology, The Ohio State University, Columbus, Ohio 43212, United States
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95
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Xu J, Zou Y, Nashalian A, Chen J. Leverage Surface Chemistry for High-Performance Triboelectric Nanogenerators. Front Chem 2020; 8:577327. [PMID: 33330365 PMCID: PMC7717947 DOI: 10.3389/fchem.2020.577327] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/15/2020] [Indexed: 12/18/2022] Open
Abstract
Triboelectric Nanogenerators (TENGs) are a highly efficient approach for mechanical-to-electrical energy conversion based on the coupling effects of contact electrification and electrostatic induction. TENGs have been intensively applied as both sustainable power sources and self-powered active sensors with a collection of compelling features, including lightweight, low cost, flexible structures, extensive material selections, and high performances at low operating frequencies. The output performance of TENGs is largely determined by the surface triboelectric charges density. Thus, manipulating the surface chemical properties via appropriate modification methods is one of the most fundamental strategies to improve the output performances of TENGs. This article systematically reviews the recently reported chemical modification methods for building up high-performance TENGs from four aspects: functional groups modification, ion implantation and decoration, dielectric property engineering, and functional sublayers insertion. This review will highlight the contribution of surface chemistry to the field of triboelectric nanogenerators by assessing the problems that are in desperate need of solving and discussing the field's future directions.
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Affiliation(s)
- Jing Xu
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States
| | - Yongjiu Zou
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States
| | - Ardo Nashalian
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jun Chen
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States
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96
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Pavan C, Santalucia R, Leinardi R, Fabbiani M, Yakoub Y, Uwambayinema F, Ugliengo P, Tomatis M, Martra G, Turci F, Lison D, Fubini B. Nearly free surface silanols are the critical molecular moieties that initiate the toxicity of silica particles. Proc Natl Acad Sci U S A 2020; 117:27836-27846. [PMID: 33097669 PMCID: PMC7668052 DOI: 10.1073/pnas.2008006117] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Inhalation of silica particles can induce inflammatory lung reactions that lead to silicosis and/or lung cancer when the particles are biopersistent. This toxic activity of silica dusts is extremely variable depending on their source and preparation methods. The exact molecular moiety that explains and predicts this variable toxicity of silica remains elusive. Here, we have identified a unique subfamily of silanols as the major determinant of silica particle toxicity. This population of "nearly free silanols" (NFS) appears on the surface of quartz particles upon fracture and can be modulated by thermal treatments. Density functional theory calculations indicates that NFS locate at an intersilanol distance of 4.00 to 6.00 Å and form weak mutual interactions. Thus, NFS could act as an energetically favorable moiety at the surface of silica for establishing interactions with cell membrane components to initiate toxicity. With ad hoc prepared model quartz particles enriched or depleted in NFS, we demonstrate that NFS drive toxicity, including membranolysis, in vitro proinflammatory activity, and lung inflammation. The toxic activity of NFS is confirmed with pyrogenic and vitreous amorphous silica particles, and industrial quartz samples with noncontrolled surfaces. Our results identify the missing key molecular moieties of the silica surface that initiate interactions with cell membranes, leading to pathological outcomes. NFS may explain other important interfacial processes involving silica particles.
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Affiliation(s)
- Cristina Pavan
- Louvain Centre for Toxicology and Applied Pharmacology, UCLouvain, 1200 Brussels, Belgium
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, 10125 Turin, Italy
| | - Rosangela Santalucia
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, 10125 Turin, Italy
| | - Riccardo Leinardi
- Louvain Centre for Toxicology and Applied Pharmacology, UCLouvain, 1200 Brussels, Belgium
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, 10125 Turin, Italy
| | - Marco Fabbiani
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, 10125 Turin, Italy
| | - Yousof Yakoub
- Louvain Centre for Toxicology and Applied Pharmacology, UCLouvain, 1200 Brussels, Belgium
| | - Francine Uwambayinema
- Louvain Centre for Toxicology and Applied Pharmacology, UCLouvain, 1200 Brussels, Belgium
| | - Piero Ugliengo
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, 10125 Turin, Italy
| | - Maura Tomatis
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, 10125 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, 10125 Turin, Italy
| | - Gianmario Martra
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, 10125 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, 10125 Turin, Italy
| | - Francesco Turci
- Department of Chemistry, University of Turin, 10124 Turin, Italy;
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, 10125 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, 10125 Turin, Italy
| | - Dominique Lison
- Louvain Centre for Toxicology and Applied Pharmacology, UCLouvain, 1200 Brussels, Belgium;
| | - Bice Fubini
- Department of Chemistry, University of Turin, 10124 Turin, Italy
- "G. Scansetti" Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, 10125 Turin, Italy
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97
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Andraos C, Gulumian M. The toxicity of respirable South African mine tailings dust in relation to their physicochemical properties. Inhal Toxicol 2020; 32:431-445. [PMID: 33095071 DOI: 10.1080/08958378.2020.1836092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Decades of mining in South Africa has given rise to hundreds of tailings storage facilities (TSFs) and several tonnes of waste. These TSFs have contributed to air pollution due to the lack of proper rehabilitation measures. Currently, it is not known whether tailings emissions could be the cause of respiratory-related ill effects. In addition, the physicochemical properties that may govern their toxicity have not yet been identified. AIM The aim of this research was to determine the toxicity of tailings dust and identify the physicochemical properties likely to govern toxicity. METHODS Dust samples were collected from five TSFs in the Gauteng and North West Provinces of South Africa and sieved to enrich the airborne particle fraction more likely to be inhaled. Thereafter, their physicochemical characteristics were assessed i.e. size distribution, specific surface area, shape, surface elemental composition, mineral composition, total elemental composition and surface activity. In addition, the toxicity and cellular internalization of the particles were assessed using the BEAS-2B epithelial and U937 monocytic-macrophage cell lines. Results: The results showed that all tailings dusts showed toxicity, particularly in the BEAS-2B cell line. This toxicity could have been governed by either their elemental composition, e.g. high transition elements e.g. Fe, Cu, Cr and V in the dusts from TSF 4, or a combination of other physicochemical properties, e.g. higher quartz content, lower size and higher surface area in the dusts from TSF 1. CONCLUSION These results provide mechanistic evidence to support future epidemiological studies attempting to link tailings dust exposure to adverse health effects.
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Affiliation(s)
- Charlene Andraos
- Toxicology Department, National Institute for Occupational Health, Johannesburg, South Africa
| | - Mary Gulumian
- Toxicology Department, National Institute for Occupational Health, Johannesburg, South Africa.,Haematology and Molecular Medicine Department, University of the Witwatersrand, Johannesburg, South Africa
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98
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Bag S, Rauwolf S, Suyetin M, Schwaminger SP, Wenzel W, Berensmeier S. Buffer Influence on the Amino Acid Silica Interaction. Chemphyschem 2020; 21:2347-2356. [PMID: 32794279 PMCID: PMC7702087 DOI: 10.1002/cphc.202000572] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/11/2020] [Indexed: 12/11/2022]
Abstract
Protein-surface interactions are exploited in various processes in life sciences and biotechnology. Many of such processes are performed in presence of a buffer system, which is generally believed to have an influence on the protein-surface interaction but is rarely investigated systematically. Combining experimental and theoretical methodologies, we herein demonstrate the strong influence of the buffer type on protein-surface interactions. Using state of the art chromatographic experiments, we measure the interaction between individual amino acids and silica, as a reference to understand protein-surface interactions. Among all the 20 proteinogenic amino acids studied, we found that arginine (R) and lysine (K) bind most strongly to silica, a finding validated by free energy calculations. We further measured the binding of R and K at different pH in presence of two different buffers, MOPS (3-(N-morpholino)propanesulfonic acid) and TRIS (tris(hydroxymethyl)aminomethane), and find dramatically different behavior. In presence of TRIS, the binding affinity of R/K increases with pH, whereas we observe an opposite trend for MOPS. These results can be understood using a multiscale modelling framework combining molecular dynamics simulation and Langmuir adsorption model. The modelling approach helps to optimize buffer conditions in various fields like biosensors, drug delivery or bio separation engineering prior to the experiment.
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Affiliation(s)
- Saientan Bag
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)KarlsruheGermany
| | - Stefan Rauwolf
- Bioseparation Engineering GroupDepartment of Mechanical EngineeringTechnical University of Munich(TUM)GarchingGermany
| | - Mikhail Suyetin
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)KarlsruheGermany
| | - Sebastian P. Schwaminger
- Bioseparation Engineering GroupDepartment of Mechanical EngineeringTechnical University of Munich(TUM)GarchingGermany
| | - Wolfgang Wenzel
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)KarlsruheGermany
| | - Sonja Berensmeier
- Bioseparation Engineering GroupDepartment of Mechanical EngineeringTechnical University of Munich(TUM)GarchingGermany
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99
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Lan T, Liu J, Zeng H, Tang T. Temperature-Induced Transition from Indirect to Direct Adsorption of Polycyclic Aromatic Hydrocarbons on Quartz: A Combined Theoretical and Experimental Study. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02412] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tu Lan
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
- Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, P. R. China
| | - Jing Liu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Tian Tang
- Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
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100
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Zhang J, Zhai J, Zheng H, Li X, Wang Y, Li X, Xing B. Adsorption, desorption and coadsorption behaviors of sulfamerazine, Pb(II) and benzoic acid on carbon nanotubes and nano-silica. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 738:139685. [PMID: 32526408 DOI: 10.1016/j.scitotenv.2020.139685] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/18/2020] [Accepted: 05/23/2020] [Indexed: 06/11/2023]
Abstract
In this study, nano-silica (Nano-SiO2), oxidized (O-CNTs) and graphitized multi-walled carbon nanotubes (G-CNTs) were applied as model adsorbents to study the adsorption, desorption and coadsorption behaviors of sulfamerazine (SMR), Pb(II) and benzoic acid (BA). The results showed that charge assisted H-bond (CAHB) formation played an important role in adsorption of SMR and BA on O-riched nanomaterials. The adsorption capacities of Pb(II) on CNTs were 21.46- 26.77 times higher than that on Nano-SiO2, which was mainly attributed to surface complexation and cation-π interaction. The fraction of Pb2+ adsorbed in the inside channel of CNTs should not be ignored. In coexisting systems, the absolute sorption inhibition of the SMR (ΔQeSMR) was compared with the amount of competitor adsorbed. Competitive sorption was observed as indicated by adding Pb(II) decreased adsorption of SMR on Nano-SiO2 (ΔQeSMR > 0), but hardly affected SMR adsorption on CNTs (ΔQeSMR ≈ 0) which was attributed to cation-π interaction. In addition, CAHB formed between SMR and Nano-SiO2 (ΔpKa ≈ 4.34) was weaker than that formed between SMR and O-CNTs (ΔpKa ≈ 3.15), which also consequently resulted in stronger competition of Pb(II) to SMR on Nano-SiO2 than that on O-CNTs. Moreover, coexisting BA increased adsorption of SMR on Nano-SiO2 and G-CNTs (ΔQeSMR < 0), but did not result in an apparent competition on SMR adsorption by O-CNTs (ΔQeSMR ≈ 0). These results emphasize that the environmental behaviors of a certain pollutant should be assessed carefully by considering the presence of other pollutants.
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Affiliation(s)
- Jinlong Zhang
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Jieru Zhai
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Hao Zheng
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China
| | - Xiaoyun Li
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China.
| | - Yuru Wang
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Xiaoping Li
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States.
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