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189 results on '"Torok, J."'

1. Shear Zones in granular materials: Optimization in a self-organized random potential

Author

Torok, J, Unger, T., Kertesz, J., and Wolf, D. E.

Subjects
Condensed Matter - Soft Condensed Matter, Condensed Matter - Statistical Mechanics
Abstract

We introduce a model to describe the wide shear zones observed in modified Couette cell experiments with granular material. The model is a generalization of the recently proposed approach based on a variational principle. The instantaneous shear band is identified with the surface that minimizes the dissipation in a random potential that is biased by the local velocity difference and pressure. The apparent shear zone is the ensemble average of the instantaneous shear bands. The numerical simulation of this model matches excellently with experiments and has measurable predictions., Comment: 4 pages, 5 figures

Published
2006
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2. Morphologies of three-dimensional shear bands in granular media

Author

Fazekas, S., Torok, J., Kertesz, J., and Wolf, D. E.

Subjects
Condensed Matter - Soft Condensed Matter
Abstract

We present numerical results on spontaneous symmetry breaking strain localization in axisymmetric triaxial shear tests of granular materials. We simulated shear band formation using three-dimensional Distinct Element Method with spherical particles. We demonstrate that the local shear intensity, the angular velocity of the grains, the coordination number, and the local void ratio are correlated and any of them can be used to identify shear bands, however the latter two are less sensitive. The calculated shear band morphologies are in good agreement with those found experimentally. We show that boundary conditions play an important role. We discuss the formation mechanism of shear bands in the light of our observations and compare the results with experiments. At large strains, with enforced symmetry, we found strain hardening., Comment: 6 pages 5 figures, low resolution figures!

Published
2005
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3. Shear band formation in granular media as a variational problem

Author

Unger, T., Torok, J., Kertesz, J., and Wolf, D. E.

Subjects
Condensed Matter - Soft Condensed Matter, Condensed Matter - Statistical Mechanics
Abstract

Strain in sheared dense granular material is often localized in a narrow region called shear band. Recent experiments in a modified Couette cell provided localized shear flow in the bulk away from the confining walls. The non-trivial shape of the shear band was measured as the function of the cell geometry. First we present a geometric argument for narrow shear bands which connects the function of their surface position with the shape in the bulk. Assuming a simple dissipation mechanism we show that the principle of minimum dissipation of energy provides a good description of the shape function. Furthermore, we discuss the possibility and behavior of shear bands which are detached from the free surface and are entirely covered in the bulk., Comment: 4 pages, 5 figures; minor changes, typos and journal-ref added

Published
2004
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4. Sharp crossover and anomalously large correlation length in driven systems

Author

Kafri, Y., Levine, E., Mukamel, D., and Torok, J.

Subjects
Condensed Matter - Statistical Mechanics
Abstract

Models of one-dimensional driven diffusive systems sometimes exhibit an abrupt increase of the correlation length to an anomalously large but finite value as the parameters of the model are varied. This behavior may be misinterpreted as a genuine phase transition. A simple mechanism for this sharp increase is presented. The mechanism is introduced within the framework of a recently suggested correspondence between driven diffusive systems and zero-range processes. It is shown that when the dynamics of the model is such that small domains are suppressed in the steady-state distribution, anomalously large correlation length may build up. The mechanism is examined in detail in two models.

Published
2002
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5. Criterion for phase separation in one-dimensional driven systems

Author

Kafri, Y., Levine, E., Mukamel, D., Schutz, G. M., and Torok, J.

Subjects
Condensed Matter - Statistical Mechanics
Abstract

A general criterion for the existence of phase separation in driven one-dimensional systems is proposed. It is suggested that phase separation is related to the size dependence of the steady-state currents of domains in the system. A quantitative criterion for the existence of phase separation is conjectured using a correspondence made between driven diffusive models and zero-range processes. Several driven diffusive models are discussed in light of the conjecture.

Published
2002
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6. Temperature synchronizes temporal variation in laying dates across European hole-nesting passerines

Author

Vriend, S. J. (Stefan J. G.), Grotan, V. (Vidar), Gamelon, M. (Marlene), Adriaensen, F. (Frank), Ahola, M. P. (Markus P.), Alvarez, E. (Elena), Bailey, L. D. (Liam D.), Barba, E. (Emilio), Bouvier, J.-C. (Jean-Charles), Burgess, M. D. (Malcolm D.), Bushuev, A. (Andrey), Camacho, C. (Carlos), Canal, D. (David), Charmantier, A. (Anne), Cole, E. F. (Ella F.), Cusimano, C. (Camillo), Doligez, B. F. (Blandine F.), Drobniak, S. M. (Szymon M.), Dubiec, A. (Anna), Eens, M. (Marcel), Eeva, T. (Tapio), Erikstad, K. E. (Kjell Einar), Ferns, P. N. (Peter N.), Goodenough, A. E. (Anne E.), Hartley, I. R. (Ian R.), Hinsley, S. A. (Shelley A.), Ivankina, E. (Elena), Juskaitis, R. (Rimvydas), Kempenaers, B. (Bart), Kerimov, A. B. (Anvar B.), Kalas, J. A. (John Atle), Lavigne, C. (Claire), Leivits, A. (Agu), Mainwaring, M. C. (Mark C.), Martinez-Padilla, J. (Jesus), Matthysen, E. (Erik), van Oers, K. (Kees), Orell, M. (Markku), Pinxten, R. (Rianne), Reiertsen, T. K. (Tone Kristin), Rytkönen, S. (Seppo), Senar, J. C. (Juan Carlos), Sheldon, B. C. (Ben C.), Sorace, A. (Alberto), Torok, J. (Janos), Vatka, E. (Emma), Visser, M. E. (Marcel E.), Saether, B.-E. (Bernt-Erik), Vriend, S. J. (Stefan J. G.), Grotan, V. (Vidar), Gamelon, M. (Marlene), Adriaensen, F. (Frank), Ahola, M. P. (Markus P.), Alvarez, E. (Elena), Bailey, L. D. (Liam D.), Barba, E. (Emilio), Bouvier, J.-C. (Jean-Charles), Burgess, M. D. (Malcolm D.), Bushuev, A. (Andrey), Camacho, C. (Carlos), Canal, D. (David), Charmantier, A. (Anne), Cole, E. F. (Ella F.), Cusimano, C. (Camillo), Doligez, B. F. (Blandine F.), Drobniak, S. M. (Szymon M.), Dubiec, A. (Anna), Eens, M. (Marcel), Eeva, T. (Tapio), Erikstad, K. E. (Kjell Einar), Ferns, P. N. (Peter N.), Goodenough, A. E. (Anne E.), Hartley, I. R. (Ian R.), Hinsley, S. A. (Shelley A.), Ivankina, E. (Elena), Juskaitis, R. (Rimvydas), Kempenaers, B. (Bart), Kerimov, A. B. (Anvar B.), Kalas, J. A. (John Atle), Lavigne, C. (Claire), Leivits, A. (Agu), Mainwaring, M. C. (Mark C.), Martinez-Padilla, J. (Jesus), Matthysen, E. (Erik), van Oers, K. (Kees), Orell, M. (Markku), Pinxten, R. (Rianne), Reiertsen, T. K. (Tone Kristin), Rytkönen, S. (Seppo), Senar, J. C. (Juan Carlos), Sheldon, B. C. (Ben C.), Sorace, A. (Alberto), Torok, J. (Janos), Vatka, E. (Emma), Visser, M. E. (Marcel E.), and Saether, B.-E. (Bernt-Erik)

Abstract

Identifying the environmental drivers of variation in fitness-related traits is a central objective in ecology and evolutionary biology. Temporal fluctuations of these environmental drivers are often synchronized at large spatial scales. Yet, whether synchronous environmental conditions can generate spatial synchrony in fitness-related trait values (i.e., correlated temporal trait fluctuations across populations) is poorly understood. Using data from long-term monitored populations of blue tits (Cyanistes caeruleus, n = 31), great tits (Parus major, n = 35), and pied flycatchers (Ficedula hypoleuca, n = 20) across Europe, we assessed the influence of two local climatic variables (mean temperature and mean precipitation in February-May) on spatial synchrony in three fitness-related traits: laying date, clutch size, and fledgling number. We found a high degree of spatial synchrony in laying date but a lower degree in clutch size and fledgling number for each species. Temperature strongly influenced spatial synchrony in laying date for resident blue tits and great tits but not for migratory pied flycatchers. This is a relevant finding in the context of environmental impacts on populations because spatial synchrony in fitness-related trait values among populations may influence fluctuations in vital rates or population abundances. If environmentally induced spatial synchrony in fitness-related traits increases the spatial synchrony in vital rates or population abundances, this will ultimately increase the risk of extinction for populations and species. Assessing how environmental conditions influence spatiotemporal variation in trait values improves our mechanistic understanding of environmental impacts on populations.

Published
2023

7. Bird populations most exposed to climate change are less sensitive to climatic variation

Author

Bailey, L. D. (Liam D.), van de Pol, M. (Martijn), Adriaensen, F. (Frank), Arct, A. (Aneta), Barba, E. (Emilio), Bellamy, P. E. (Paul E.), Bonamour, S. (Suzanne), Bouvier, J.-C. (Jean-Charles), Burgess, M. D. (Malcolm D.), Charmantier, A. (Anne), Cusimano, C. (Camillo), Doligez, B. (Blandine), Drobniak, S. M. (Szymon M.), Dubiec, A. (Anna), Eens, M. (Marcel), Eeva, T. (Tapio), Ferns, P. N. (Peter N.), Goodenough, A. E. (Anne E.), Hartley, I. R. (Ian R.), Hinsley, S. A. (Shelley A.), Ivankina, E. (Elena), Juskaitis, R. (Rimvydas), Kempenaers, B. (Bart), Kerimov, A. B. (Anvar B.), Lavigne, C. (Claire), Leivits, A. (Agu), Mainwaring, M. C. (Mark C.), Matthysen, E. (Erik), Nilsson, J.-A. (Jan-Ake), Orell, M. (Markku), Rytkönen, S. (Seppo), Carlos Senar, J. (Juan), Sheldon, B. C. (Ben C.), Sorace, A. (Alberto), Stenning, M. J. (Martyn J.), Torok, J. (Janos), van Oers, K. (Kees), Vatka, E. (Emma), Vriend, S. J. (Stefan J. G.), Visser, M. E. (Marcel E.), Bailey, L. D. (Liam D.), van de Pol, M. (Martijn), Adriaensen, F. (Frank), Arct, A. (Aneta), Barba, E. (Emilio), Bellamy, P. E. (Paul E.), Bonamour, S. (Suzanne), Bouvier, J.-C. (Jean-Charles), Burgess, M. D. (Malcolm D.), Charmantier, A. (Anne), Cusimano, C. (Camillo), Doligez, B. (Blandine), Drobniak, S. M. (Szymon M.), Dubiec, A. (Anna), Eens, M. (Marcel), Eeva, T. (Tapio), Ferns, P. N. (Peter N.), Goodenough, A. E. (Anne E.), Hartley, I. R. (Ian R.), Hinsley, S. A. (Shelley A.), Ivankina, E. (Elena), Juskaitis, R. (Rimvydas), Kempenaers, B. (Bart), Kerimov, A. B. (Anvar B.), Lavigne, C. (Claire), Leivits, A. (Agu), Mainwaring, M. C. (Mark C.), Matthysen, E. (Erik), Nilsson, J.-A. (Jan-Ake), Orell, M. (Markku), Rytkönen, S. (Seppo), Carlos Senar, J. (Juan), Sheldon, B. C. (Ben C.), Sorace, A. (Alberto), Stenning, M. J. (Martyn J.), Torok, J. (Janos), van Oers, K. (Kees), Vatka, E. (Emma), Vriend, S. J. (Stefan J. G.), and Visser, M. E. (Marcel E.)

Abstract

The phenology of many species shows strong sensitivity to climate change; however, with few large scale intra-specific studies it is unclear how such sensitivity varies over a species’ range. We document large intra-specific variation in phenological sensitivity to temperature using laying date information from 67 populations of two co-familial European songbirds, the great tit (Parus major) and blue tit (Cyanistes caeruleus), covering a large part of their breeding range. Populations inhabiting deciduous habitats showed stronger phenological sensitivity than those in evergreen and mixed habitats. However, populations with higher sensitivity tended to have experienced less rapid change in climate over the past decades, such that populations with high phenological sensitivity will not necessarily exhibit the strongest phenological advancement. Our results show that to effectively assess the impact of climate change on phenology across a species’ range it will be necessary to account for intra-specific variation in phenological sensitivity, climate change exposure, and the ecological characteristics of a population.

Published
2022

9. Interaction of climate change with effects of conspecific and heterospecific density on reproduction

Author

Moller, A. P. (Anders Pape), Balbontin, J. (Javier), Dhondt, A. A. (Andre A.), Adriaensen, F. (Frank), Artemyev, A. (Alexandr), Banbura, J. (Jerzy), Barba, E. (Emilio), Biard, C. (Clotilde), Blondel, J. (Jacques), Bouvier, J.-C. (Jean-Charles), Camprodon, J. (Jordi), Cecere, F. (Francesco), Charter, M. (Motti), Cichon, M. (Mariusz), Cusimano, C. (Camillo), Dubiec, A. (Anna), Eens, M. (Marcel), Eeva, T. (Tapio), Ferns, P. N. (Peter N.), Forsman, J. T. (Jukka T.), Goldshtein, A. (Aya), Goodenough, A. E. (Anne E.), Gosler, A. G. (Andrew G.), Gustafsson, L. (Lars), Harnist, I. (Iga), Hartley, I. R. (Ian R.), Heeb, P. (Philipp), Hinsley, S. A. (Shelley A.), Jacob, S. (Staffan), Jarvinen, A. (Antero), Juskaitis, R. (Rimvydas), Korpimaki, E. (Erkki), Krams, I. (Indrikis), Laaksonen, T. (Toni), Leclercq, B. (Bernard), Lehikoinen, E. (Esa), Loukola, O. (Olli), Mainwaring, M. C. (Mark C.), Mand, R. (Raivo), Massa, B. (Bruno), Matthysen, E. (Erik), Mazgajski, T. D. (Tomasz D.), Merino, S. (Santiago), Mitrus, C. (Cezary), Monkkonen, M. (Mikko), Nager, R. G. (Ruedi G.), Nilsson, J.-a. (Jan-ake), Nilsson, S. G. (Sven G.), Norte, A. C. (Ana C.), von Numers, M. (Mikael), Orell, M. (Markku), Pimentel, C. S. (Carla S.), Pinxten, R. (Rianne), Priedniece, I. (Ilze), Remes, V. (Vladimir), Richner, H. (Heinz), Robles, H. (Hugo), Rytkonen, S. (Seppo), Senar, J. C. (Juan Carlos), Seppanen, J. T. (Janne T.), da Silva, L. P. (Luis P.), Slagsvold, T. (Tore), Solonen, T. (Tapio), Sorace, A. (Alberto), Stenning, M. J. (Martyn J.), Torok, J. (Janos), Tryjanowski, P. (Piotr), van Noordwijk, A. J. (Arie J.), Walankiewicz, W. (Wieslaw), Lambrechts, M. M. (Marcel M.), Moller, A. P. (Anders Pape), Balbontin, J. (Javier), Dhondt, A. A. (Andre A.), Adriaensen, F. (Frank), Artemyev, A. (Alexandr), Banbura, J. (Jerzy), Barba, E. (Emilio), Biard, C. (Clotilde), Blondel, J. (Jacques), Bouvier, J.-C. (Jean-Charles), Camprodon, J. (Jordi), Cecere, F. (Francesco), Charter, M. (Motti), Cichon, M. (Mariusz), Cusimano, C. (Camillo), Dubiec, A. (Anna), Eens, M. (Marcel), Eeva, T. (Tapio), Ferns, P. N. (Peter N.), Forsman, J. T. (Jukka T.), Goldshtein, A. (Aya), Goodenough, A. E. (Anne E.), Gosler, A. G. (Andrew G.), Gustafsson, L. (Lars), Harnist, I. (Iga), Hartley, I. R. (Ian R.), Heeb, P. (Philipp), Hinsley, S. A. (Shelley A.), Jacob, S. (Staffan), Jarvinen, A. (Antero), Juskaitis, R. (Rimvydas), Korpimaki, E. (Erkki), Krams, I. (Indrikis), Laaksonen, T. (Toni), Leclercq, B. (Bernard), Lehikoinen, E. (Esa), Loukola, O. (Olli), Mainwaring, M. C. (Mark C.), Mand, R. (Raivo), Massa, B. (Bruno), Matthysen, E. (Erik), Mazgajski, T. D. (Tomasz D.), Merino, S. (Santiago), Mitrus, C. (Cezary), Monkkonen, M. (Mikko), Nager, R. G. (Ruedi G.), Nilsson, J.-a. (Jan-ake), Nilsson, S. G. (Sven G.), Norte, A. C. (Ana C.), von Numers, M. (Mikael), Orell, M. (Markku), Pimentel, C. S. (Carla S.), Pinxten, R. (Rianne), Priedniece, I. (Ilze), Remes, V. (Vladimir), Richner, H. (Heinz), Robles, H. (Hugo), Rytkonen, S. (Seppo), Senar, J. C. (Juan Carlos), Seppanen, J. T. (Janne T.), da Silva, L. P. (Luis P.), Slagsvold, T. (Tore), Solonen, T. (Tapio), Sorace, A. (Alberto), Stenning, M. J. (Martyn J.), Torok, J. (Janos), Tryjanowski, P. (Piotr), van Noordwijk, A. J. (Arie J.), Walankiewicz, W. (Wieslaw), and Lambrechts, M. M. (Marcel M.)

Abstract

We studied the relationship between temperature and the coexistence of great tit Parus major and blue tit Cyanistes caeruleus, breeding in 75 study plots across Europe and North Africa. We expected an advance in laying date and a reduction in clutch size during warmer springs as a general response to climate warming and a delay in laying date and a reduction in clutch size during warmer winters due to density‐dependent effects. As expected, as spring temperature increases laying date advances and as winter temperature increases clutch size is reduced in both species. Density of great tit affected the relationship between winter temperature and laying date in great and blue tit. Specifically, as density of great tit increased and temperature in winter increased both species started to reproduce later. Density of blue tit affected the relationship between spring temperature and blue and great tit laying date. Thus, both species start to reproduce earlier with increasing spring temperature as density of blue tit increases, which was not an expected outcome, since we expected that increasing spring temperature should advance laying date, while increasing density should delay it cancelling each other out. Climate warming and its interaction with density affects clutch size of great tits but not of blue tits. As predicted, great tit clutch size is reduced more with density of blue tits as temperature in winter increases. The relationship between spring temperature and density on clutch size of great tits depends on whether the increase is in density of great tit or blue tit. Therefore, an increase in temperature negatively affected the coexistence of blue and great tits differently in both species. Thus, blue tit clutch size was unaffected by the interaction effect of density with temperature, while great tit clutch size was affected in multiple ways by these interactions terms.

Published
2020

10. Selected bisphenols and phthalates screened for estrogen and androgen disruption by in silico and in vitro methods

Author

Kandarova, H., Letasiova, S., Bachelor, M., Milasova, T., Markus, J., Ayehunie, S., Dvořáková, M., Kejlová, K., Rucki, M., Jírová, D., Indra, R., Wilhelm, M., Černá, T., Heger, Z., Dostálová, S., Adam, V., Eckschlager, T., Stiborová, M., Hraběta, J., Arlt, V.M., Schmeiser, H.H., Zdurienčíková, M., Gronesová, P., Sedlák, J., Nekvindova, J., Hyrslova Vaculova, A., Soucek, P., Anzenbacher, P., Vondracek, J., Kiss, I., Slaby, O., Kala, Z., Palicka, V., Horváthová, E., Mastihuba, V., Karnišová Potocká, E., Kis, P., Gálová, E., Ševčovičová, A., Klapáková, M., Mastihubová, M., Vondráček, J., Hýžďalová, M., Pivnička, J., Zapletal, O., Neča, J., Machala, M., Figat, R., Wójtowicz, A., Sobczak, M., Śliwińska, A., Pietrosiuk, A., Nałęcz-Jawecki, G., Košťálová, E., Nagyová, V., Kilbergerová, H., Chomová, L., Kurejová, H., Pavlikova, N., Daniel, P., Sramek, J., Jelinek, M., Halada, P., Kovar, J., Jírová, G., Vlková, A., Wittlerová, M., Kašparová, L., Chrz, J., Wittlingerová, Z., Zimová, M., Mráz, J., Hanzlíková, I., Dušková, Š., Tvrdíková, M., Chrástecká, H., Vajtrová, R., Linhart, I., Brandeburová, P., Grenčíková, A., Žabka, D., Mackuľak, T., Ryba, J., Bondarev, D., Kassa, J., Hepnarova, V., Musilek, K., Misik, J., Hatlapatkova, J., Zdarova Karasova, J., Korabecny, J., Gorecki, L., Malinak, D., Hrabinova, M., Soukup, O., Jun, D., Kuca, K., Benkova, M., Marek, J., Sleha, R., Ryskova, L., Matula, M., Tumu, H., Cuffari, B., Billack, B., Koprdová, R., Májeková, M., Kiss, A., Osacká, J., Dremencov, E., Csatlósová, K., Kokras, N., Dalla, C., Švecová, B., Mach, M., Heger, V., Viskupicova, J., Zoofishan, Z., Hunyadi, A., Horakova, L., Bogi, E., Belovicova, K., Csatlosova, K., Moravcíkova, L., Lacinova, L., Dubovicky, M., Sasváriová, M., Kaprinay, B., Salvaras, L., Belovičová, K., Bögi, E., Knézl, V., Barteková, M., Stankovičová, T., Dubovický, M., Hayes, A.W., vom Berg, C., Iskandar, A., Hoeng, J., Peitsch, MC, Dourson, M., Ambrož, M., Lněničková, K., Matoušková, P., Skálová, L., Boušová, I., Andreji, J., Dvořák, P., Anzenbacherová, E., Prokop, J., Mrkvicová, E., Pavlata, L., Zapletalová, I., Šťastník, O., Martinek, P., Kosina, P., Bögi, E, Csatlosová, K., Bernatova, I., Balis, P., Kluknavsky, M., Zemancikova, A., Torok, J., Puzserova, A., Zárybnický, T., Trnčáková, V., Šubrt, Z., Dršata, J., Brucknerová, I., Brucknerova, J., Ujházy, E., Bujňáková Mlynarčíková, A., Scsuková, S., Caloudova, H., Hodkovicova, N., Berlinska, J., Marsalek, B., Panacek, A., Svobodova, Z., Pino, M.A., Capek, J., Brychtová, V., Handl, J., Majtnerová, P., Rousar, T., Dračínská, H., Jelínková, S., Dvořák, J., Dvořáková Líšková, Z., Graňáková, P., Raisová, Stuchlíková L., Podlipná, R., Szotáková, B., Majerová, M., Hamulakova, S., Janovec, L., Čapek, J., Roušar, T., Hanousková, B., Zemanová, K., Hlávková, D., Havelková, B., Beklová, M., Hodek, P., Hucková, P., Hušková, A., Šimůnek, J., Mrázek, J., Hudeček, J., Sehonova, P., Blahova, J., Vaclavik, J., Hrabinová, M., Schmidt, M., Misík, J., Jáklová, K., Pompach, P., Takácsová, P., Vavrová, K., Kopečková, K., Kolárik, M., Jambor, T., Greifova, H., Massanyi, P., Lukac, N., Járová, K., Osičková, P., Kauerová, T., Hamadová, D., Kollár, P., Goněc, T., Kos, J., Jampílek, J., Syrovets, T., Parák, T., Suchý, P., Kobrlova, T., Janockova, J., Kubíčková, B., Rychnová, J., Dostálová, K., Vyhnalová, K., Mrázková, J., Mandys, V., Wimmerová, M., Lazová, J., Bednáriková, M., Imreová, P., Múčková, M., Lipcseyová, D., Benešová, B., Šoltésová Prnová, M., Štefek, M., Viskupičová, J., Láníčková, T., Tománková, V., Cibiček, N., Snášelová, S., Ulrichová, J., Maňáková, E., Hubičková Heringová, L., Skála, M., Skarková, V., Brynychová, V., Souček, P., Heglasová, S., Dugasová, L., Morová, M., Šimončičová, E., Senko, T., Olexová, L., Dzirbíková, Z., Kršková, L., Muckova, L., Jost, P., Pejchal, J., Nowakowska, K., Giebultowicz, J., Kamaszewski, M., Drobniewska, A., Wroczyński, P., Paprskářová, A., Kuzminová, G., Klusáková, J., Hendrych, M., Pavelka, S., Piešová, M., Račková, L., Škandík, M., Straková, Z., Bezek, Š., Jančinová, V., Raisová, L., Martínková, L., Sabolová, D., Imrichová, N., Rendošová, M., Vargová, Z., Lakatoš, B., Gulač, P., Moserová, M., Martínková, E., Frei, E., Syslová, E., Landa, P., Vaněk, T., Harant, K., Šadibolová, M., Deingruberová, K., Špičáková, A., Kraus, P., Strnad, M., Šušaníková, I., Kukurová, Ľ., Forman, V., Mučaji, P., Tvrdý, V., Karlíčková, J., Hanuščinová, L., Mladěnka, P., Ujhazy, E., Koprdova, R., Brucknerova, I., Valachová, K., Topoľská, D., Šoltés, L., Vanduchova, A., Anzenbacherova, E., Vasicek, O., Rubanova, D., Babinkova, P., Fedr, R., Svenda, J., Kubala, L., Vrba, J., Roubalova, L., Vacek, J., Storch, J., Zaltauskaite, J., Jakubynaite, A., Dikšaitytė, A., Januškaitienė, I., Sujetovienė, G., Kacienė, K., Miškelytė, D., and Juknys, R.

Subjects
L-07, L-29, L-06, L-28, L-09, L-08, Article, Abstract Book, L-03, L-25, L-02, L-24, L-05, L-27, L-04, L-26, L-21, L-20, L-01, L-23, L-22, L-18, L-17, L-19, L-30, L-14, L-13, L-16, L-15, L-10, L-32, L-31, L-12, L-11
Published
2018

21. EFFECT OF LOW DOSE L-NAME PRETREATMENT ON NITRIC OXIDE/REACTIVE OXYGEN SPECIES BALANCE AND VASOACTIVITY IN L-NAME/SALT-INDUCED HYPERTENSIVE RATS.

Author

VRANKOVA, S., ZEMANCIKOVA, A., TOROK, J., and PECHANOVA, O.

Subjects
EFFECT of salt on plants, NICOTINAMIDE adenine dinucleotide phosphate, REACTIVE oxygen species, NITRIC oxide, NADPH oxidase, NITRIC-oxide synthases
Abstract

Nicotinamide adenine dinucleotide phosphate hydrogen (NADPH) oxidase-dependent reactive oxygen species (ROS) overproduction and decreased nitric oxide (NO) bioavailability lead to vascular dysfunction and development of hypertension. The goal of our study was to analyze an effect of salt diet and NO synthase (NOS) inhibition with NG-nitro-Larginine methyl ester (L-NAME) on blood pressure (BP), arterial reactivity, NO production, as well as ROS level in adult rats pretreated with low dose of L-NAME (2 mg/kg/day) for three weeks. Higher dose of L-NAME (40 mg/kg/day), or salt diet (8% NaCl), or combination of both were applied for the following four weeks. The administration of L-NAME in low dose had no effect on BP but enhanced the expression of eNOS. Both higher dose of L-NAME and salt diet elevated BP, decreased NOS activity, and impaired the endothelium-dependent arterial relaxation. However, salt diet did not increase ROS production and sympathoadrenergic arterial contractions in low dose L-NAME-pretreated rats. Combination of salt diet with higher dose of L-NAME did not evoke additive decrease of NOS activity, but it caused elevation of conjugated dienes (CD) concentration and NADPH oxidase 2 (Nox-2) protein expression. In conclusion, these findings indicate that chronic low dose of L-NAME treatment has a potential to trigger adapting mechanisms to attenuate some cardiovascular disorders. [ABSTRACT FROM AUTHOR]

Published
2019
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24. Mechanical packaging, power, and cooling design for the IBM z13

Author

Torok, J. G., primary, Bosco, F. E., additional, Goth, G. F., additional, Loparco, J. J., additional, Peets, M., additional, Porter, D., additional, Shevach, S. G., additional, Tucker, B. C., additional, VanDeventer, A. C., additional, Wei, X., additional, Wendling, P. A., additional, Yu, Y.-Y., additional, and Zoodsma, R. J., additional

Published
2015
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25. Shear Band Patterns in Biaxially Sheared Granular Media

Author

Torok, J., Brendel, L., Wolf, D. E., Nakagawa, M., and Luding, S.

Subjects
Materials science, business.industry, Structural engineering, Mechanics, Physik (inkl. Astronomie), Pure shear, Condensed Matter::Soft Condensed Matter, Shear rate, Shear modulus, Shear (geology), Critical resolved shear stress, Shear stress, business, Shear flow, Shear band
Abstract

Applying the principle of least dissipation rate to the biaxial shear geometry leads to the prediction that there are preferred shear band patterns according to the aspect ratio of the shear cell. By means of the Mohr‐Coulomb angle these patterns can be classified in terms of two integer indices. They are expected to have a certain life time which is particularly long for low index configurations. This explains the temporal fluctuations of the stress ratio in “steady state flow,” which so far were believed to be random.

Published
2009

32. Large-scale geographical variation confirms that climate change causes birds to lay earlier

Author

Both, C, Artemyev, A V, Blaauw, B, Cowie, R J, Dekhuijzen, A J, Eeva, T, Enemar, A, Gustafsson, Lars, Ivankina, E V, Jarvinen, A, Metcalfe, N B, Nyholm, N E I, Potti, J, Ravussin, P A, Sanz, J J, Silverin, B, Slater, F M, Sokolov, L V, Torok, J, Winkel, W, Wright, J, Zang, H, Visser, M E, Both, C, Artemyev, A V, Blaauw, B, Cowie, R J, Dekhuijzen, A J, Eeva, T, Enemar, A, Gustafsson, Lars, Ivankina, E V, Jarvinen, A, Metcalfe, N B, Nyholm, N E I, Potti, J, Ravussin, P A, Sanz, J J, Silverin, B, Slater, F M, Sokolov, L V, Torok, J, Winkel, W, Wright, J, Zang, H, and Visser, M E

Published
2004
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