704 research outputs found
The change of normative gender orders in the process of migration. A transnational perspective
No full textJungwirth I. The change of normative gender orders in the process of migration. A transnational perspective. COMCAD Arbeitspapiere - working papers, 48. Bielefeld: COMCAD - Center on Migration, Citizenship and Development; 2008.In this paper, the question of social change for women as actors of migration is examined. Apart from feminist theory and international gender studies, this topic is located in migration studies and social theory as well. It is proposed to analyse the transformation of gender norms in processes of migration in connection with the changes taking place in the domain of labour, namely the increasing tertiarisation in post-industrial societies on the one hand, and a globalising economy and international distribution of labour following from this on the other. A concept for transnational gender orders is outlined, proposing that, along with these economic and structural processes, normative requirements and ascriptions for social actors are emerging as well. They target the gender performance of women as actors of migration, insofar as an assumed universal gender socialisation as women is becoming a qualification and resource in an international distribution of labour
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River Continuum and Fish Migration - Going Beyond the Longitudinal River Corridor in Understanding Ecological Integrity
No full textHealth and safety of labor migrants in food industries during Covid-19: Germany, Netherlands and USA
No full textGottlieb ND, de Lange T, Mantu S, Jungwirth I, Glassner M, Forst L. Health and safety of labor migrants in food industries during Covid-19: Germany, Netherlands and USA. European Journal of Public Health . 2023;33(Suppl. 2): ckad160.552
Das Unternehmen als außerschulischer Lernort – Potenziale und Herausforderungen von Schule-Wirtschafts-Kooperationen
No full textGausling P. Das Unternehmen als außerschulischer Lernort – Potenziale und Herausforderungen von Schule-Wirtschafts-Kooperationen. In: Jungwirth M, Harsch N, Korflür Y, Stein M, eds. Forschen. Lernen. Lehren an öffentlichen Orten – The Wider View. Eine Tagung des Zentrums für Lehrerbildung der Westfälischen Wilhelms-Universität Münster vom 16. bis 19.09.2019. Schriften zur Allgemeinen Hochschuldidaktik . Vol 5. Münster: WTM; 2020: 327-328
Počítačové modelování interakcí iont ů s proteiny: Allosterický efekt iont ů a fenolických ligand ů na strukturu insulinového hexameru
No full textNázev práce: Počítačové modelování interakcí iontů s proteiny: Allosterický efekt iontů a fenolických ligandů na strukturu insulinového hexameru Autor: Vladimír Palivec Katedra: Katedra fyzikální a makromolekulární chemie PřF UK Vedoucí diplomové práce: prof. RNDr. Pavel Jungwirth, DSc., UOCHB AV ČR, v.v.i. Email vedoucího: [email protected] Abstrakt: Insulinový hexamer je alosterický protein, který můžeme nalézt ve třech různých konformacích (T6, T3R3, R6). Tvorbu a konformaci inzulinového hexameru můžeme ovlivnit například vazbou iontů, či takzvaných fenolických ligandů. V této práci jsem zkoumal inzulinové hexamery v různých konformacích za pomoci molekulové dynamiky. Studie je rozdělena na dvě části. V první části zkoumám efekt vazby kationtů (Zn2+ , Ca2+ , K+ and Na+ ) na T6 a T3R3 inzulinové hexamery. V druhé části se zaměřím na neurotransmitery serotonin a dopamin, které by mohly sloužit jako fenolické ligandy v in vivo podmínkách. Výsledky první části výzkumu ukazují, že ionty s vysokou nábojovou hustotou (Zn2+ , Ca2+ ) jsou mnohem více lokalizované v kavitě, která se nachází uprostřed hexameru. Toto vede ke zpomalení difuze vodních molekul, což se projeví také tím, že uvnitř se nachází vždy pouze jeden kation. Monovalentní kationty tento efekt nemají. V druhé části práce ukáži, že z obou...Title: Computer modeling of ion protein interactions: Allosteric effects of phenolic ligands and ions on insulin hexamer structure Author: Vladimír Palivec Department: Department of Physical and Macromolecular Chemistry Faculty of Science UK Advisor: prof. RNDr. Pavel Jungwirth, DSc., IOCB AS CR, v.v.i. Advisor's email address: [email protected] Abstract: Insulin hexamer is an allosteric protein capable of undergoing conformational changes between three states: T6, T3R3, and R6. Transitions between them, as well as the formation of insulin hexamers, are mediated through binding of phenolic ligands or ions. This thesis presents a molecular dynamics study of allosteric behavior of insulin using empirical force fields. Two effects are closely inspected - cation (Zn2+ , Ca2+ , K+ , and Na+ ) binding to the insulin hexamers and a possible binding of two neurotransmitters - dopamine and serotonin to the phenolic pocket. The results show that high charge density cations (Zn2+ and Ca2+ ) are mostly localized in the B13 glutamate cavity, slow- down diffusion, while preventing other cations from entering. In contrast, low charge density cations (Na+ and K+ ) do not have this effect. Concerning neurotransmitters, dopamine does not bind to the phenolic pocket whereas serotonin binds in a similar way like...Department of Physical and Macromolecular ChemistryKatedra fyzikální a makromol. chemiePřírodovědecká fakultaFaculty of Scienc
Molekulové simulace nukleace ledu
No full textTitle: Molecular simulations of ice nucleation Author: Eva Pluhařová Department: Department of Physical and Macromolecular Chemistry Faculty of Science UK Advisor: doc. Mgr. Pavel Jungwirth, DSc., IOCB AS CR, v.v.i. Advisor's e-mail address: [email protected] Abstract: By means of molecular dynamics simulations we have systematically investigated homogeneous ice nucleation in neat and surface contaminated water. As models of the adsorbates we have assumed pentanol and pentanoic acid. In neat water nucleation preferentially starts in the subsurface region, which accommodates better than the bulk the volume increase associated with freezing. Homogeneous ice nucleation is affected more by alcohol than by acid. Water slabs covered by a disordered layer of pentanol exhibit negligible preference for subsurface nucleation and longer nucleation times in comparison with neat water, while nucleation times are almost unaffected by the presence of pentanoic acid and the subsurface preference is only slightly decreased. We tried to rationalize the differences between the effects of different compounds by their ability to orient water molecules and to change their mobility. The fact that adsorbates differ in the influence on homogeneous ice nucleation has important implications for the microphysics of..
Computer modeling of ion protein interactions: Allo steric effects of phenolic ligands and ions on insulin hexamer struct ure
No full textTitle: Computer modeling of ion protein interactions: Allosteric effects of phenolic ligands and ions on insulin hexamer structure Author: Vladimír Palivec Department: Department of Physical and Macromolecular Chemistry Faculty of Science UK Advisor: prof. RNDr. Pavel Jungwirth, DSc., IOCB AS CR, v.v.i. Advisor's email address: [email protected] Abstract: Insulin hexamer is an allosteric protein capable of undergoing conformational changes between three states: T6, T3R3, and R6. Transitions between them, as well as the formation of insulin hexamers, are mediated through binding of phenolic ligands or ions. This thesis presents a molecular dynamics study of allosteric behavior of insulin using empirical force fields. Two effects are closely inspected - cation (Zn2+ , Ca2+ , K+ , and Na+ ) binding to the insulin hexamers and a possible binding of two neurotransmitters - dopamine and serotonin to the phenolic pocket. The results show that high charge density cations (Zn2+ and Ca2+ ) are mostly localized in the B13 glutamate cavity, slow- down diffusion, while preventing other cations from entering. In contrast, low charge density cations (Na+ and K+ ) do not have this effect. Concerning neurotransmitters, dopamine does not bind to the phenolic pocket whereas serotonin binds in a similar way like..
Model geomagnetske informacije za 2013. godinu
No full textThe finalization of the survey of the Basic Geomagnetic Network of the Republic of Croatia (BGNRC) and completion of geomagnetic information models for the Institute for Research and Development of Defence Systems of the Ministry of Defence and the State Geodetic Administration (e.g. Brkić M., E. Jungwirth, D. Matika and Ž. Bačić, 2012, Geomagnetic Information and Safety, 3rd Conference of Croatian National Platform for Disaster Risk Reduction, National Protection and Rescue Directorate, Zagreb) was followed in 2012 with validity confirmation of the GI2012 predictive model by geomagnetic observations in quiet conditions. The differences between the measured and modelled declination were found to be within the expected errors of the model. It needs to be pointed out that this was the first successful implementation of night surveying (especially suitable for geomagnetic surveys of airports) in the Republic of Croatia.Po završetku izmjera Osnovne geomagnetske mreže Republike Hrvatske (OGMRH) i izrade modela geomagnetske informacije za potrebe Instituta za istraživanje i razvoj obrambenih sustava Ministarstva obrane RH i Državne geodetske uprave (vidi npr. Brkić M., E. Jungwirth, D. Matika i Ž. Bačić, 2012, Geomagnetska informacija i sigurnost, 3. Konferencija Hrvatske platforme za smanjenje rizika od katastrofa, Državna uprava za zaštitu i spašavanje, Zagreb), ove godine slijedila je potvrda valjanosti predikcijskog modela GI2012 geomagnetskim opažanjima pri mirnim uvjetima. Pronađene razlike mjerene i modelirane deklinacije su unutar očekivane pogreške modela.Valja istaknuti da je pri tome po prvi put u Republici Hrvatskoj uspješno provedena noćna izmjera (prikladna posebice pri geomagnetskoj izmjeri zračnih luka)
Ion Specific Hofmeister Effects on Peptides and Proteins
No full textTitle: Ion Specific Hofmeister Effects on Peptides and Proteins Author: Ing. Jana Hladílková Department: Physical and Macromolecular Chemistry Advisor: Prof. Pavel Jungwirth, DSc., IOCB AS CR Advisor's email address: [email protected] Abstract: Classical molecular dynamics simulations in combination with advanced methods of analysis were used to shed light on missing parts of our molecular understanding of the Hofmeister series. In tandem with various experimental techniques, real proteins as well as model systems were investigated in aqueous salt solutions in order to identify and quantify ion-protein interactions either leading or not leading to the canonical cationic and anionic Hofmeister ordering. The potassium cation was found to significantly enhance the BHMT enzymatic activity in contrast to the rest of the common monovalent cations. In the quest to rationalize this behavior, a key potassium binding site in the vicinity of the active site was discovered and described. Moreover, the exceptionally strong effect of K+ on the enzymatic activity was explained by hydration properties of the cations within the limited space of the active site in interplay with their attraction to the nearby negatively charged residues. By contrast, only a small and indirect influence, which follows the cationic..
Výzkum monomolekulárních organických vrstev a jejich interakce s atmosférickými oxidanty a polutanty
No full textNázev práce: Výzkum monomolekulárních organických vrstev a jejich interakce s atmosferickými oxidanty a polutanty Autor: Mgr. Alena Habartová Ústav: Ústav organické chemie a biochemie, Akademie věd České republiky Vedoucí disertační práce: prof. Mgr. Pavel Jungwirth, DSc. Abstrakt: Pomocí simulací klasické molekulové dynamiky jsme studovali in- terakce Langmuirových monovrstev kyseliny palmitové a haloalkanů, jako látek znečišťujících ovzduší a jako modelových systémů přirozeně se vyskytujících v atmosféricky relevantních makroskopických vodních systémech a aerosolech. Zkou- mali jsme rozdělení, orientaci, solvataci, jakož i strukturu a morfologii jednotlivých složek a jejich směsi na rozhraní voda/vzduch při různých teplotách, abychom ověřili náš výpočetní model a doplnili experimentální data detaily na molekulové úrovni. Ukázali jsme, že halogenuhlovodíkové molekuly adsorbované na amorfních ledových nanočásticích při 100 K zůstávají převážně izolované a netvoří agregáty, na rozdíl od jejich shlukování na kryogenních argonových nanočásticích. Doku- mentujeme, že chloro-, bromo- a jodoalkany s krátkými alkylovými řetězci (C1 až C5) preferují vnější oblast rozhraní voda/vzduch. Jejich průměrné rezidenční doby se pohybují v rozmezí stovek ps až několika ns při teplotě 300 K a závisejí na délce alkylového...Title: Investigation of monomolecular organic layers and their interaction with atmospheric oxidants and polutants Author: Mgr. Alena Habartová Institute: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic Advisor: prof. Mgr. Pavel Jungwirth, DSc. Abstract: Using classical molecular dynamics simulations, we studied interac- tions between Langmuir monolayers of palmitic acid (PA) and haloalkanes as serious atmospheric pollutants, to model naturally occurring and atmospherical- ly relevant complex surfaces of extended water bodies and aqueous aerosols. We investigated partitioning, orientation, solvation, as well as structure and morphol- ogy of the individual components and their mixture at water/vapor interfaces at different temperatures in order to validate our computational model and com- plement experimental data with molecular-level details. First, we have shown that halocarbon molecules adsorbed on amorphous ice nanoparticles at 100 K remain mostly isolated and do not form aggregates, in contrast to their cluste- ring on cryogenic argon nanoparticles. Next, we report that chloro-, bromo-, and iodoalkanes with short alkyl chains (up to C5) exhibit high preference for the outermost region of the water/vapor interface. Their average residence times of several...Matematicko-fyzikální fakultaFaculty of Mathematics and Physic
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