1
|
Kulyukin VA, Coster D, Tkachenko A, Hornberger D, Kulyukin AV. Ambient Electromagnetic Radiation as a Predictor of Honey Bee ( Apis mellifera) Traffic in Linear and Non-Linear Regression: Numerical Stability, Physical Time and Energy Efficiency. Sensors (Basel) 2023; 23:2584. [PMID: 36904786 PMCID: PMC10007012 DOI: 10.3390/s23052584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/11/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
Since bee traffic is a contributing factor to hive health and electromagnetic radiation has a growing presence in the urban milieu, we investigate ambient electromagnetic radiation as a predictor of bee traffic in the hive's vicinity in an urban environment. To that end, we built two multi-sensor stations and deployed them for four and a half months at a private apiary in Logan, UT, USA. to record ambient weather and electromagnetic radiation. We placed two non-invasive video loggers on two hives at the apiary to extract omnidirectional bee motion counts from videos. The time-aligned datasets were used to evaluate 200 linear and 3,703,200 non-linear (random forest and support vector machine) regressors to predict bee motion counts from time, weather, and electromagnetic radiation. In all regressors, electromagnetic radiation was as good a predictor of traffic as weather. Both weather and electromagnetic radiation were better predictors than time. On the 13,412 time-aligned weather, electromagnetic radiation, and bee traffic records, random forest regressors had higher maximum R2 scores and resulted in more energy efficient parameterized grid searches. Both types of regressors were numerically stable.
Collapse
Affiliation(s)
| | - Daniel Coster
- Department of Mathematics and Statistics, Utah State University, Logan, UT 84322, USA
| | | | - Daniel Hornberger
- Department of Computer Science, Utah State University, Logan, UT 84322, USA
| | | |
Collapse
|
2
|
Butov D, Feshchenko Y, Chesov D, Myasoedov V, Kuzhko M, Dudnyk A, Reimann M, Hryshchuk L, Yareshko A, Tkachenko A, Tarleeva Y, Konstantynovska O, Butova T, Lange C. National survey on the impact of the war in Ukraine on TB diagnostics and treatment services in 2022. Int J Tuberc Lung Dis 2023; 27:86-88. [PMID: 36853139 DOI: 10.5588/ijtld.22.0563] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- D Butov
- Kharkiv National Medical University, Kharkiv, Ukraine, Research Center Borstel, Leibniz Lung Center, Borstel, Germany
| | - Y Feshchenko
- National Institute of Phthisiology and Pulmonology (F. G. Yanovskyi NAMS), Kyiv, Ukraine
| | - D Chesov
- National Institute of Phthisiology and Pulmonology (F. G. Yanovskyi NAMS), Kyiv, Ukraine, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Republic of Moldova
| | - V Myasoedov
- Kharkiv National Medical University, Kharkiv, Ukraine
| | - M Kuzhko
- National Institute of Phthisiology and Pulmonology (F. G. Yanovskyi NAMS), Kyiv, Ukraine
| | - A Dudnyk
- National Pirogov Memorial Medical University, Vinnytsia, Ukraine
| | - M Reimann
- Research Center Borstel, Leibniz Lung Center, Borstel, Germany
| | - L Hryshchuk
- I Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - A Yareshko
- Poltava State Medical University, Poltava, Ukraine
| | - A Tkachenko
- Kharkiv National Medical University, Kharkiv, Ukraine
| | - Y Tarleeva
- Government Agency Center of Public Health of the Ministry of Health of Ukraine, Kyiv, Ukraine
| | - O Konstantynovska
- VN Karazin Kharkiv National University, Kharkiv, Ukraine, Regional Tuberculosis Dispensary 1, Kharkiv, Ukraine
| | - T Butova
- Kharkiv National Medical University, Kharkiv, Ukraine, Respiratory Medicine and International Health, University of Lübeck, Lübeck, Germany
| | - C Lange
- Research Center Borstel, Leibniz Lung Center, Borstel, Germany, German Center for Infection Research (DZIF) Tuberculosis Unit, Borstel, Germany, Respiratory Medicine and International Health, University of Lübeck, Lübeck, Germany, Global TB Program, Baylor College of Medicine and Texas Children´s Hospital, Houston, TX, USA
| |
Collapse
|
3
|
Kulyukin V, Tkachenko A, Price K, Meikle W, Weiss M. Integration of Scales and Cameras in Nondisruptive Electronic Beehive Monitoring: On the Within-Day Relationship of Hive Weight and Traffic in Honeybee (Apis mellifera) Colonies in Langstroth Hives in Tucson, Arizona, USA. Sensors 2022; 22:s22134824. [PMID: 35808321 PMCID: PMC9269415 DOI: 10.3390/s22134824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/17/2022] [Accepted: 06/22/2022] [Indexed: 12/10/2022]
Abstract
The relationship between beehive weight and traffic is a fundamental open research problem for electronic beehive monitoring and digital apiculture, because weight and traffic affect many aspects of honeybee (Apis mellifera) colony dynamics. An investigation of this relationship was conducted with a nondisruptive two-sensor (scale and camera) system on the weight and video data collected on six Apis mellifera colonies in Langstroth hives at the USDA-ARS Carl Hayden Bee Research Center in Tucson, Arizona, USA, from 15 May to 15 August 2021. Three hives had positive and two hives had negative correlations between weight and traffic. In one hive, weight and traffic were uncorrelated. The strength of the correlation between weight and traffic was stronger for longer time intervals. The traffic spread and mean, when taken separately, did not affect the correlation between weight and traffic more significantly than the exact traffic counts from videos. Lateral traffic did not have a significant impact on weight.
Collapse
Affiliation(s)
- Vladimir Kulyukin
- Department of Computer Science, Utah State University, Logan, UT 84322, USA; (A.T.); (K.P.)
- Correspondence:
| | - Anastasiia Tkachenko
- Department of Computer Science, Utah State University, Logan, UT 84322, USA; (A.T.); (K.P.)
| | - Kristoffer Price
- Department of Computer Science, Utah State University, Logan, UT 84322, USA; (A.T.); (K.P.)
| | - William Meikle
- Carl Hayden Bee Research Center, USDA-ARS, Tucson, AZ 85719, USA; (W.M.); (M.W.)
| | - Milagra Weiss
- Carl Hayden Bee Research Center, USDA-ARS, Tucson, AZ 85719, USA; (W.M.); (M.W.)
| |
Collapse
|
4
|
Budnev N, Astapov I, Bezyazeekov P, Boreyko V, Borodin A, Brueckner M, Chiavassa A, Dyachok A, Fedorov O, Gafarov A, Garmash A, Gorbunov N, Grebenyuk V, Gress O, Gress T, Grishin O, Grinyuk A, Haungs A, Hiller R, Horns D, Huege T, Kalmykov N, Kazarina Y, Kindin V, Kiryuhin S, Kirilenko P, Kleifges M, Kokoulin R, Kompaniets K, Korosteleva E, Kostunin D, Kozhin V, Kravchenko E, Kuzmichev L, Lemeshev Y, Lenok V, Lubsandorzhiev B, Lubsandorzhiev N, Mirgazov R, Mirzoyan R, Monkhoev R, Osipova E, Pakhorukov A, Panasyuk M, Pankov L, Petrukhin A, Poleschuk V, Popescu M, Popova E, Porelli A, Postnikov E, Prosin V, Ptuskin V, Rjabov E, Rubtsov G, Pushnin A, Sagan Y, Sabirov B, Samoliga V, Schröder F, Semeney Y, Silaev A, Silaev A, Sidorenkov A, Skurikhin A, Slunecka V, Sokolov A, Spiering C, Sveshnikova L, Tabolenko V, Tarashansky B, Tkachenko A, Tkachev L, Tluczykont M, Wischnewski R, Zagorodnikov A, Zhurov D, Zurbanov V, Yashin I. TAIGA - a hybrid array for high energy gamma astronomy and cosmic ray physics. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201819101007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The physics motivations and advantages of the new TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) detector are presented. TAIGA aims at gamma-ray astronomy at energies from a few TeV to several PeV, as well as cosmic ray physics from 100 TeV to several EeV. For the energy range 30 – 200 TeV the sensitivity of 10 km2 area TAIGA array for the detection of local sources is expected to be 5 × 10-14 erg cm-2 sec-1 for 300 h of observations. Reconstruction of the given EAS energy, incoming direction and its core position, based on the timing TAIGA-HiSCORE data, allows one to increase a distance between the IACTs up to 600-1000 m. The low investments together with the high sensitivity for energies ≥ 30-50 TeV make this pioneering technique very attractive for exploring the galactic PeVatrons and cosmic rays. At present the TAIGA first stage has been constructed in Tunka valley, 50 km West from the Lake Baikal. The first experimental results of the TAIGA first stage are presented.
Collapse
|
5
|
Koval O, Volkova O, Kulemzin S, Gorchakov A, Tkachenko A, Nushtaeva A, Kuligina E, Richter V, Taranin A. NK-cell based delivery of anticancer therapeutics. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx711.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
6
|
Tkachenko A, Bermudez M, Irmer-Stooff S, Genkinger D, Henkler-Stephani F, Wolber G, Luch A. Nuclear transport of the human aryl hydrocarbon receptor and subsequent gene induction relies on its residue histidine 291. Arch Toxicol 2017; 92:1151-1160. [PMID: 29164305 DOI: 10.1007/s00204-017-2129-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/15/2017] [Indexed: 12/11/2022]
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor involved in the metabolism of physiological substances and xenobiotics, representing an interesting target in both toxicology and pharmacology. In this study, we investigated the ligand-dependent conjunction of nuclear import of the human AHR in living cells and target gene induction. Our findings strengthen the theory that the AHR triggers a precisely defined and rapid reaction upon binding to endogenous ligands, while the xenobiotic β-naphthoflavone only induces rather unspecific and slow effects. To better illuminate the ligand-mediated responses of the human AHR, we applied site-directed mutagenesis and identified histidine 291 as key residue for AHR functionality, essential for both nuclear import and target gene induction. Contrary, replacing histidine at position 291 by alanine did not affect nucleo-cytoplasmic shuttling, showing that permanent endogenous import and ligand-induced import of the AHR into the nucleus are two independent and differently regulated processes. Combining these observations with our structural investigations using a homology model of the AHR-PAS B domain, we suggest a dual role of histidine 291: (1) a major role for shaping the ligand binding site including direct interactions with ligands and, (2) an essential role for the conformational dynamics of a PAS B loop, which most likely influences the association of the AHR with the AHR nuclear translocator through interference with their protein-protein interface.
Collapse
Affiliation(s)
- A Tkachenko
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany.
| | - M Bermudez
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2 + 4, 14195, Berlin, Germany
| | - S Irmer-Stooff
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - D Genkinger
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - F Henkler-Stephani
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - G Wolber
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2 + 4, 14195, Berlin, Germany
| | - A Luch
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| |
Collapse
|
7
|
Beck PG, Kallinger T, Pavlovski K, Palacios A, Tkachenko A, García RA, Mathis S, Corsaro E, Johnston C, Mosser B, Ceillier T, do Nascimento JD, Raskin G. Constraining stellar physics from red-giant stars in binaries – stellar rotation, mixing processes and stellar activity. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716005008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
8
|
Kuzmichev L, Astapov I, Bezyazeekov P, Boreyko V, Borodin A, Brückner M, Budnev N, Chiavassa A, Gress O, Gress T, Grishin O, Dyachok A, Epimakhov S, Fedorov O, Gafarov A, Grebenyuk V, Grinyuk A, Haungs A, Horns D, Huege T, Ivanova A, Jurov D, Kalmykov N, Kazarina Y, Kindin V, Kiryuhin V, Kokoulin R, Kompaniets K, Korosteleva E, Kostunin D, Kozhin V, Kravchenko E, Kunnas M, Lenok V, Lubsandorzhiev B, Lubsandorzhiev N, Mirgazov R, Mirzoyan R, Monkhoev R, Nachtigal R, Osipova E, Pakharukov A, Panasyuk M, Pankov L, Petrukhin A, Poleschuk V, Popesku M, Popova E, Porelli A, Postnikov E, Prosin V, Ptuskin V, Pushnin A, Rubtsov G, Ryabov E, Sagan Y, Samoliga V, Schröder F, Semeney Y, Silaev A, Silaev A, Sidorenko A, Skurikhin A, Slunecka V, Sokolov A, Spiering C, Sveshnikova L, Sulakov V, Tabolenko V, Tarashansky B, Tkachenko A, Tkachev L, Tluczykont M, Wischnewski R, Zagorodnikov A, Zurbanov V, Yashin I. Tunka Advanced Instrument for cosmic rays and Gamma Astronomy (TAIGA): Status, results and perspectives. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201714501001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
9
|
Tluczykont M, Budnev N, Astapov I, Barbashina N, Bogdanov A, Boreyko V, Brückner M, Chiavassa A, Chvalaev O, Gress O, Gress T, Grishin O, Dyachok A, Epimakhov S, Fedorov O, Gafarov A, Gorbunov N, Grebenyuk V, Grinuk A, Horns D, Kalinin A, Karpov N, Kalmykov N, Kazarina Y, Kiryuhin S, Kokoulin R, Kompaniets K, Konstantinov A, Korosteleva E, Kozhin V, Kravchenko E, Kunnas M, Kuzmichev L, Lemeshev Y, Lubsandorzhiev B, Lubsandorzhiev N, Mirgazov R, Mirzoyan R, Monkhoev R, Nachtigall R, Osipova E, Pakhorukov A, Panasyuk M, Pankov L, Petrukhin A, Poleschuk V, Popova E, Porelli A, Postnikov E, Prosin V, Ptuskin V, Rubtsov G, Pushnin A, Samoliga V, Satunin P, Semeney Y, Silaev A, Silaev A, Skurikhin A, Slunecka M, Sokolov A, Spiering C, Sveshnikova L, Tabolenko V, Tarashansky B, Tkachenko A, Tkachev L, Voronin D, Wischnewski R, Zagorodnikov A, Zurbanov V, Zhurov D, Yashin I. The TAIGA timing array HiSCORE - first results. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201713603008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
10
|
Atkin E, Bulatov V, Dorokhov V, Gorbunov N, Filippov S, Grebenyuk V, Karmanov D, Kovalev I, Kudryashov I, Merkin M, Pakhomov A, Podorozhny D, Polkov D, Porokhovoy S, Shumikhin V, Sveshnikova L, Tkachenko A, Tkachev L, Torochkov M, Turundaevskiy A, Vasiliev O, Voronin A. The NUCLEON space experiment. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/201510501002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
11
|
Tarabrin O, Shcherbakov S, Tkachenko A, Kushnir O, Grychushenko I. Influence of epidural anesthesia on the hemocoagulation disorders and quantity of septic complications in patients with acute necrotizing pancreatitis. Crit Care 2013. [PMCID: PMC3642733 DOI: 10.1186/cc12292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
|
12
|
Di Mauro M, Cardini D, Ventura R, Stello D, Beck P, Davies G, Elsworth Y, García R, Hekker S, Mosser B, Christensen-Dalsgaard J, Bloemen S, Catanzaro G, De Smedt K, Tkachenko A. Internal rotation of red giants by asteroseismology. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134303012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Tkachenko A, Da Silva L, Hearne J, Parveen S, Waguespack Y. An assay to screen bacterial adhesion to mucus biomolecules. Lett Appl Microbiol 2012; 56:79-82. [PMID: 23020180 DOI: 10.1111/lam.12003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Revised: 09/17/2012] [Accepted: 09/19/2012] [Indexed: 11/28/2022]
Abstract
AIMS To develop an assay for rapid screening of bacterial adhesion to various groups of biomolecules present in fish mucus. METHODS AND RESULTS A novel assay was developed for investigation of bacterial adhesion to various groups of mucus biomolecules from fish. Lipid-, protein-, carbohydrate- and nucleic acid-rich constituents of mucus were separated using isopycnic density gradient centrifugation techniques. Separated mucus fractions were assayed for bacterial adhesion using a blotting apparatus. The assay was validated using Vibrio vulnificus and skin mucus from hybrid tilapia. CONCLUSIONS A novel assay was developed for the screening of bacterial adhesion to major groups of mucus biomolecules. Adhesion of V. vulnificus MLT403 positively correlated with lipid- and protein-rich mucus constituents and negatively correlated with carbohydrate-rich mucus constituents. SIGNIFICANCE AND IMPACT OF THE STUDY The assay can be used as an initial approach in a systematic identification of mucus constituent(s) exhibiting the most favourable adhesion properties for bacteria.
Collapse
Affiliation(s)
- A Tkachenko
- Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA
| | | | | | | | | |
Collapse
|
14
|
Shulga S, Tkachenko A, Tigunova O, Beyko N, Kchomenko A. Microbial lipids as an alternative bio fuel. N Biotechnol 2012. [DOI: 10.1016/j.nbt.2012.08.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
15
|
Shulga S, Tkachenko A, Beyko N, Khomenko A, Andriiash G. Tryptophan production by Corynebacterium glutamicum. N Biotechnol 2012. [DOI: 10.1016/j.nbt.2012.08.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Derekas A, Kiss LL, Borkovits T, Huber D, Lehmann H, Southworth J, Bedding TR, Balam D, Hartmann M, Hrudkova M, Ireland MJ, Kovács J, Mező G, Moór A, Niemczura E, Sarty GE, Szabó GM, Szabó R, Telting JH, Tkachenko A, Uytterhoeven K, Benkő JM, Bryson ST, Maestro V, Simon AE, Stello D, Schaefer G, Aerts C, ten Brummelaar TA, De Cat P, McAlister HA, Maceroni C, Mérand A, Still M, Sturmann J, Sturmann L, Turner N, Tuthill PG, Christensen-Dalsgaard J, Gilliland RL, Kjeldsen H, Quintana EV, Tenenbaum P, Twicken JD. HD 181068: A Red Giant in a Triply Eclipsing Compact Hierarchical Triple System. Science 2011; 332:216-8. [DOI: 10.1126/science.1201762] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- A. Derekas
- Department of Astronomy, Eötvös University, Budapest, Hungary
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
| | - L. L. Kiss
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
- Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
| | - T. Borkovits
- Baja Astronomical Observatory, H-6500 Baja, Szegedi út, Kt. 766, Hungary
- Eötvös József College, H-6500 Baja, Szegedi út 2, Hungary
| | - D. Huber
- Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
| | - H. Lehmann
- Thüringer Landessternwarte (TLS) Tautenburg, Karl-Schwarzschild-Observatorium, 07778 Tautenburg, Germany
| | - J. Southworth
- Astrophysics Group, Keele University, Newcastle-Under-Lyme ST5 5BG, UK
| | - T. R. Bedding
- Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
| | - D. Balam
- Dominion Astrophysical Observatory (DAO), Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada
| | - M. Hartmann
- Thüringer Landessternwarte (TLS) Tautenburg, Karl-Schwarzschild-Observatorium, 07778 Tautenburg, Germany
| | - M. Hrudkova
- Thüringer Landessternwarte (TLS) Tautenburg, Karl-Schwarzschild-Observatorium, 07778 Tautenburg, Germany
| | - M. J. Ireland
- Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
| | - J. Kovács
- Gothard Observatory, Eötvös University, H-9704 Szombathely, Szent Imre Herceg u. 112., Hungary
| | - Gy. Mező
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
| | - A. Moór
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
| | - E. Niemczura
- Astronomical Institute, Wroclaw University, Kopernika 11, 51-622 Wroclaw, Poland
| | - G. E. Sarty
- Department of Physics and Engineering Physics, University of Saskatchewan, 9 Campus Drive, Saskatoon, Saskatchewan S7N 5A5, Canada
| | - Gy. M. Szabó
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
| | - R. Szabó
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
| | - J. H. Telting
- Nordic Optical Telescope, Apartado 474, 38700 Santa Cruz de La Palma, Spain
| | - A. Tkachenko
- Thüringer Landessternwarte (TLS) Tautenburg, Karl-Schwarzschild-Observatorium, 07778 Tautenburg, Germany
| | - K. Uytterhoeven
- Laboratoire Astrophysique, Instrumentation, et Modélisation, Commissariat à l’Energie Atomique (CEA)/Direction des Sciences de la Matière–CNRS–Université Paris Diderot; CEA, L'institut de recherche sur les lois fondamentales de l’Univers, Service d’Astrophysique, Saclay, 91191, Gif-sur-Yvette, France
- Kiepenheuer-Institut für Sonnenphysik, Schöneckstrasse 6, 79104 Freiburg, Germany
| | - J. M. Benkő
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
| | - S. T. Bryson
- National Aeronautics and Space Administration (NASA) Ames Research Center, Moffett Field, CA 94035, USA
| | - V. Maestro
- Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
| | - A. E. Simon
- Konkoly Observatory, Hungarian Academy of Sciences, H-1525 Budapest, Post Office Box 67, Hungary
| | - D. Stello
- Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
| | - G. Schaefer
- Center for High Angular Resolution Astronomy, Georgia State University, Post Office Box 3969, Atlanta, GA 30302–3969, USA
| | - C. Aerts
- Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, 3001 Leuven, Belgium
- Institute for Mathematics, Astrophysics, and Particle Physics (IMAPP), Department of Astrophysics, Radboud University Nijmegen, Post Office Box 9010, NL-6500 GL Nijmegen, Netherlands
| | - T. A. ten Brummelaar
- Center for High Angular Resolution Astronomy, Georgia State University, Post Office Box 3969, Atlanta, GA 30302–3969, USA
| | - P. De Cat
- Royal Observatory of Belgium, Ringlaan 3, 1180 Brussel, Belgium
| | - H. A. McAlister
- Center for High Angular Resolution Astronomy, Georgia State University, Post Office Box 3969, Atlanta, GA 30302–3969, USA
| | - C. Maceroni
- Istituto Nazionale di Astrofisica (INAF), Osservatorio astronomico di Roma, via Frascati 33, I-00040 Monteporzio C., Italy
| | - A. Mérand
- European Southern Observatory, Alonso de Córdova 3107, Casilla 19001, Santiago 19, Chile
| | - M. Still
- National Aeronautics and Space Administration (NASA) Ames Research Center, Moffett Field, CA 94035, USA
| | - J. Sturmann
- Center for High Angular Resolution Astronomy, Georgia State University, Post Office Box 3969, Atlanta, GA 30302–3969, USA
| | - L. Sturmann
- Center for High Angular Resolution Astronomy, Georgia State University, Post Office Box 3969, Atlanta, GA 30302–3969, USA
| | - N. Turner
- Center for High Angular Resolution Astronomy, Georgia State University, Post Office Box 3969, Atlanta, GA 30302–3969, USA
| | - P. G. Tuthill
- Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
| | | | - R. L. Gilliland
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
| | - H. Kjeldsen
- Department of Physics and Astronomy, Building 1520, Aarhus University, 8000 Aarhus C, Denmark
| | | | | | | |
Collapse
|
17
|
Ocko BM, Hlaing H, Jepsen PN, Kewalramani S, Tkachenko A, Pontoni D, Reichert H, Deutsch M. Unifying interfacial self-assembly and surface freezing. Phys Rev Lett 2011; 106:137801. [PMID: 21517421 DOI: 10.1103/physrevlett.106.137801] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Indexed: 05/30/2023]
Abstract
X-ray investigations reveal that the monolayers formed at the bulk alkanol-sapphire interface are densely packed with the surface-normal molecules hydrogen bound to the sapphire. About 30-35 °C above the bulk, these monolayers both melt reversibly and partially desorb. This system exhibits balanced intermolecular and molecule-substrate interactions which are intermediate between self-assembled and surface-frozen monolayers, each dominated by one interaction. The phase behavior is rationalized within a thermodynamic model comprising interfacial interactions, elasticity, and entropic effects. Separating the substrate from the melt leaves the monolayer structurally intact.
Collapse
Affiliation(s)
- B M Ocko
- Condensed Matter Physics & Materials Sciences Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Kirenskaya A, Kamenskov M, Myamlin V, Tkachenko A. P02-151 - The antisaccadic CNV in patients with schizophrenia and paraphilia. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)70765-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
19
|
Tkachenko A, Waguespack Y, Okoh J, May E. Isolation of intact high-molecular weight glycoconjugates from the skin mucus of Morone saxatilis (Walbaum). J Fish Dis 2006; 29:433-6. [PMID: 16866927 DOI: 10.1111/j.1365-2761.2006.00727.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Affiliation(s)
- A Tkachenko
- Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, 21853, USA.
| | | | | | | |
Collapse
|
20
|
|
21
|
|
22
|
Abstract
Photosensitivity in most echinoderms has been attributed to 'diffuse' dermal receptors. Here we report that certain single calcite crystals used by brittlestars for skeletal construction are also a component of specialized photosensory organs, conceivably with the function of a compound eye. The analysis of arm ossicles in Ophiocoma showed that in light-sensitive species, the periphery of the labyrinthic calcitic skeleton extends into a regular array of spherical microstructures that have a characteristic double-lens design. These structures are absent in light-indifferent species. Photolithographic experiments in which a photoresist film was illuminated through the lens array showed selective exposure of the photoresist under the lens centres. These results provide experimental evidence that the microlenses are optical elements that guide and focus the light inside the tissue. The estimated focal distance (4-7 micrometer below the lenses) coincides with the location of nerve bundles-the presumed primary photoreceptors. The lens array is designed to minimize spherical aberration and birefringence and to detect light from a particular direction. The optical performance is further optimized by phototropic chromatophores that regulate the dose of illumination reaching the receptors. These structures represent an example of a multifunctional biomaterial that fulfills both mechanical and optical functions.
Collapse
Affiliation(s)
- J Aizenberg
- Bell Laboratories/Lucent Technologies, Murray Hill, New Jersey 07974, USA.
| | | | | | | | | |
Collapse
|
23
|
Tkachenko A, Nesterova L, Pshenichnov M. The role of the natural polyamine putrescine in defense against oxidative stress in Escherichia coli. Arch Microbiol 2001; 176:155-7. [PMID: 11479716 DOI: 10.1007/s002030100301] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2001] [Accepted: 05/06/2001] [Indexed: 11/26/2022]
Abstract
Putrescine up-regulated, in a concentration-dependent manner, the expression levels of the oxyR and katG genes of Escherichia coli cells exposed to hydrogen peroxide. Its stimulatory effect was more pronounced under conditions of strong oxidative stress. 1,4-Diamino-2-butanone, a specific inhibitor of putrescine synthesis, also inhibited oxyR expression under oxidative stress. When added to inhibited cells, putrescine relieved this inhibitory effect. Addition of putrescine to E. coli cultures exposed to oxidative stress led to increased cell survival.
Collapse
Affiliation(s)
- A Tkachenko
- Russian Academy of Sciences, Institute of Ecology and Genetics of Microorganisms, Golev St. 13, Perm, 614081, Russia.
| | | | | |
Collapse
|
24
|
Tkachenko A, Ashar HR, Meloni AM, Sandberg AA, Chada KK. Misexpression of disrupted HMGI architectural factors activates alternative pathways of tumorigenesis. Cancer Res 1997; 57:2276-80. [PMID: 9187132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Cancer arises from aberrations in the genetic mechanisms that control growth and differentiation. HMGI-C and HMGI(Y) are members of the HMGI family of architectural factors expressed in embryonic or undifferentiated cells and highly associated with transformation. Translocations of 12q13-15 in lipomas (fat cell tumors) disrupt HMGI-C and fuse its DNA-binding domains to novel transcriptional regulatory domains. This study shows that in a rare, karyotypically distinct group of human lipomas, rearrangements of 6p21-23 produce internal deletions within HMGI(Y). Activation of the rearranged alleles leads to expression of aberrant HMGI(Y) transcripts in differentiated adipocytes. A molecular analysis of these transcripts demonstrates that fusion of HMGI DNA-binding domains to putative transcriptional regulatory domains was not necessary for lipoma formation. However, such fusions may facilitate tumor development because activation of the wild-type HMGI allele, normally required for tumorigenesis, is bypassed in lipomas which express chimeric HMGI proteins. We hypothesize that HMGI misexpression in a differentiated cell is a pivotal event in benign tumorigenesis, and the molecular pathway of tumor development depends upon the precise nature of HMGI disruption.
Collapse
Affiliation(s)
- A Tkachenko
- Department of Biochemistry, UMDNJ-Robert Wood Johnson Medical School, Piscataway, New Jersey 08854-5635, USA
| | | | | | | | | |
Collapse
|
25
|
Biltueva LS, Sablina OV, Beklemisheva VR, Shvets YU, Tkachenko A, Dukhanina O, Lushnikova TP, Vorobieva NV, Graphodatsky AS, Kisselev LL. Localization of rat K51 keratin-like locus (Krt10l) to human and animal chromosomes by in situ hybridization. Cytogenet Cell Genet 1996; 73:209-13. [PMID: 8697809 DOI: 10.1159/000134340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The rat K51 locus (gene symbol Krt10l) was mapped using isotopic in situ hybridization to rat chromosome 3, human chromosome 9, pig chromosome 6, cattle chromosome 18, and mink chromosome 1.
Collapse
Affiliation(s)
- L S Biltueva
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Ashar HR, Fejzo MS, Tkachenko A, Zhou X, Fletcher JA, Weremowicz S, Morton CC, Chada K. Disruption of the architectural factor HMGI-C: DNA-binding AT hook motifs fused in lipomas to distinct transcriptional regulatory domains. Cell 1995; 82:57-65. [PMID: 7606786 DOI: 10.1016/0092-8674(95)90052-7] [Citation(s) in RCA: 324] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Lipomas are one of the most common mesenchymal neoplasms in humans. They are characterized by consistent cytogenetic aberrations involving chromosome 12 in bands q14-15. Interestingly, this region is also the site of rearrangement for other mesenchymally derived tumors. This study demonstrates that HMGI-C, an architectural factor that functions in transcriptional regulation, has been disrupted by rearrangement at the 12q14-15 chromosomal breakpoint in lipomas. Chimeric transcripts were isolated from two lipomas in which HMGI-C DNA-binding domains (AT hook motifs) are fused to either a LIM or an acidic transactivation domain. These results, identifying a gene rearranged in a benign neoplastic process that does not proceed to a malignancy, suggest a role for HMGI-C in adipogenesis and mesenchyme differentiation.
Collapse
Affiliation(s)
- H R Ashar
- Department of Biochemistry, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, Piscataway 08854, USA
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Dalal SS, Welsh J, Tkachenko A, Ralph D, DiCicco-Bloom E, Bordás L, McClelland M, Chada K. Rapid isolation of tissue-specific and developmentally regulated brain cDNAs using RNA arbitrarily primed PCR (RAP-PCR). J Mol Neurosci 1994; 5:93-104. [PMID: 7536020 DOI: 10.1007/bf02736751] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
RNA arbitrarily primed PCR (RAP-PCR) was used to isolate cDNAs that represent developmentally regulated brain-specific genes. Five clones with a restricted pattern of expression were identified and sequenced. Four cDNAs had no obvious homology to the sequences in GenBank. One clone had over 95% homology to a Ca2+/calmodulin-insensitive adenylyl cyclase, a recently cloned gene that was isolated from rat brain and was shown to be expressed only in adult brain and lung. Two novel cDNAs were investigated further by Northern blot analysis and were found to be expressed differentially during development; their expression was confined to the forebrain in the adult mouse. Further characterization by in situ hybridization showed that the mRNA corresponding to one clone was localized to a limited number of differentiating functional structures in the developing nervous system. In the adult brain, this message is confined to the forebrain with the highest level of expression in the cortex. These data suggest that the product of this gene is involved in the establishment of neuronal networks during brain development and in synaptic plasticity in the mature cortex. This work demonstrates that RAP-PCR is a powerful method for the simultaneous detection of differences between multiple RNA populations and, as such, can be used to study differential gene expression in the brain.
Collapse
Affiliation(s)
- S S Dalal
- Department of Biochemistry, UMDNJ-Robert Wood Johnson Medical School, Piscataway 08854, USA
| | | | | | | | | | | | | | | |
Collapse
|