Number of results to display per page
Search Results
302. 2D materiály aneb grafen a jak to bylo dál
- Creator:
- Hájková, Zdeňka, Ledinský, Martin, Hývl, Matěj, Vetushka, Aliaksei, Fejfar, Antonín, Řáhová, Jaroslava, and Frank, Otakar
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- grafen, graphene, 2D materiály, 2D materials, 6, and 53
- Language:
- Czech and English
- Description:
- Odlupováním vrstevnatých materiálů (např. grafitu) lze připravit 2D krystaly s tloušťkou jednoho nebo několika málo atomů. Nejznámějším takovým 2D materiálem je grafen (monovrstva grafitu), nicméně v současnosti existují a intenzivně se zkoumají desítky podobných struktur. Příspěvek podává základní přehled o 2D materiálech, jejich vlastnostech, metodách přípravy a možných aplikacích., Layered materials (such as graphite) can be exfoliated to produce 2D crystals with a thickness of one of just a few atoms. The best known 2D material is graphene (monolayer of graphite), yet there are tens of similar structures, which are being studied intensively at the moment. This article presents a brief summary of 2D materials, their properties, methods of preparation and potential application., Zdeňka Hájková, Martin Ledinský, Matěj Hývl, Aliaksei Vetushka, Antonín Fejfar, Jaroslava Řáhová, Otakar Frank., and Obsahuje bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
303. 2Hz-electroacupuncture attenuates heroin-seeking behaviors via adjusts CB1-Rs and CB2-Rs expression in relapse-relevant brain regions of heroin self-administration rats
- Creator:
- Chen, Lin, Gong, Xiao-Kang, Leng, Chang-Long, Ma, Bao-Miao, Ru, Qin, Xiong, Qi, Yue, Kai, Zhou, Mei, Tian, Xiang, Li, Chao-Ying, and Wu, Yu-Xiang
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- heroin self-administration, 2Hz-electroacupuncture, heroinseeking behaviors, and CB1-Rs and CB2-Rs
- Language:
- English
- Description:
- Opiate addiction has a high rate of relapse. The accumulating evidence shows that electroacupuncture (EA) may be effective for the treatment of opiate relapse. However, the change of expression of CB1-Rs and CB2-Rs involve in 2Hz EA anti-relapse pathway is still unclear. To explore the changes of expression of CB1-Rs and CB2-Rs, heroin self-administration (SA) model rats were adopted and treated using 2Hz EA. The expressions of CB1-Rs and CB2-Rs were observed using immunohistochemistry method. The results showed that, compared with the control group, active pokes in the heroin-addicted group increased, while the active pokes decreased significantly in 2Hz EA group compared with heroin-addicted group. Correspondingly, the expression of CB1-Rs in prefrontal cortex (PFC), hippocampus (Hip), nucleus accumbens (NAc) and ventral tegmental area (VTA) all increased significantly while the expression of CB2-Rs in those relapse-relevant brain regions decreased obviously in heroin-addicted group when compared with the control group. In addition, the expression of CB1-Rs obviously decreased in the 2Hz EA group while the expression of CB2-Rs in those relapserelevant brain regions increased significantly when compared with the heroin-addicted group. It indicated that 2Hz EA could attenuate the heroin-evoked seeking behaviors effectively. The anti-relapse effects of 2Hz EA might be related to the decrease of CB1-Rs and increase of CB2-Rs expression in relapse-relevant brain regions of heroin SA rats.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
304. 2nd CCP Phenogenomics Conference 2020: abstract book: Vestec, 17-18 September 2020
- Creator:
- Ústav molekulární genetiky (Akademie věd ČR), České centrum pro fenogenomiku, and CCP Phenogenomics Conference (2020 : Vestec, Praha-západ, Česko)
- Publisher:
- Institute of Molecular Genetics of the Czech Academy of Sciences
- Format:
- electronic, electronic resource, remote, bez média, online zdroj, and 89 stran : ilustrace, převážně barevné, portréty
- Type:
- model:monograph and TEXT
- Subject:
- Obecná genetika. Obecná cytogenetika. Evoluce, fenogenomika, molekulární genetika, phenogenomics, molecular genetics, 575.111:575.21, 577.21, (062.534), (048.3), 2, and 575
- Language:
- English
- Description:
- Název z obálky and born digital
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
305. 2nd international workshop on physics and technology of thin films
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- Czech
- Description:
- Zpráva uvedena na vnitřní obálce
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
306. 2nd Regional Photosynthesis Workshop Chlorophyll fluorescence: emotions & reason
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- Multiple languages
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
307. 2X2 achievement goal orientations and self-handicapping
- Creator:
- Akin, Ümran
- Format:
- print, bez média, and svazek
- Type:
- article, studie, model:article, and TEXT
- Subject:
- Psychologie, psychologie, výkonová orientace, sebeznevýhodňování, mnohonásobná regresní analýza, achievement goal orientations, self-handicapping, multiple regression analysis, 17, and 159.9
- Language:
- Czech
- Description:
- Cílem výzkumu bylo ověřit vztahy mezi výkonovou orientací a sebeznevýhodňováním. Výzkumný soubor sestával z 355 studentů Sakarya University v Turecku. 201 z nich byly ženy, 154 muži a průměrný věk byl 20,2 roku. Škála 2X2 výkonové orientace a škála sebeznevýhodňování byly použity jako míry. Vztahy mezi výkonovou orientací a sebeznevýhodňováním byly zkoumány pomocí korelační analýzy a mnohonásobné regresní analýzy. Výsledky ukázaly, že sebeznevýhodňování korelovalo pozitivně s cíli vyhýbat se učení a vyhýbat se výkonovým situacím a negativně s cíli přikročit k učení a přikročit k výkonovým situacím. Podle výsledků regresní analýzy bylo sebeznevýhodňování predikováno cíli vyhýbat se učení a vyhýbat se výkonovým situacím. Dále se ukázalo, že cíle přikročit k učení a přikročit k výkonovým situacím predikovaly sebeznevýhodňování negativně. Cíle přikročit k učení/vyhýbat se učení a přikročit k výkonovým situacím/vyhýbat se výkonovým situacím vysvětlily 69 % rozptylu sebeznevýhodňování., The aim of this research was to examine the relationships between achievement goal orientations and self-handicapping. The sample of study consists of 355 university students from Sakarya University, Turkey. 201 participants were female and 154 were male, the mean age was 20.2. The 2X2 Achievement Goal Orientations Scale and the Self-handicapping Scale were used as measures. The relationships between achievement goal orientations and self-handicapping were examined using correlation analysis and multiple regression analysis. Results showed that self-handicapping correlated positively with learning-avoidance and performance-avoidance goals and negatively with learning-approach and performance-approach goals. According to regression results, self-handicapping was predicted positively by learning-avoidance and performance-avoidance goals. Further learning- approach and performance-approach goals predicted self-handicapping in a negative way. Learning-approach/avoidance and performanceapproach/ avoidance goals have explained 69% of the variance in self-handicapping. The results should not be generalized either to all university students or to other student population. Secondly, as correlational statistics were utilized, no definitive statements can be made about causality. And last, the data are self-reported., Ümran Akin., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
308. 3 × Jonathan Culler: Jonathan Culler: Studie k teorii fikce
- Creator:
- Koten, Jiří
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
309. 3(2) aneb tři nobelisté tři dny v Praze
- Creator:
- Valenta, Jan
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- Lehn, Jean-Marie, 1939-, Sauvage, Jean-Pierre, 1944-, Haroche, Serge, nositelé cen a vyznamenání, Nobelova cena (ocenění), chemici, laureates, Nobel Prizes, chemists, 6, and 53
- Language:
- Czech
- Description:
- Koncem června se z iniciativy francouzské ambasády uskutečnila návštěva tří nositelů Nobelovy ceny v Praze - byli to chemici Jean-Marie Lehn a Jean-Pierre Sauvage a fyzik Serge Haroche. Během tří dnů jsme měli možnost se s nimi potkávat nejen při "klasických " přednáškách, ale i na několika netradičních akcích. and Jan Valenta.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
310. 3-D CFD simulations of hydrodynamics in the Sulejow dam reservoir
- Creator:
- Ziemińska-Stolarska, Aleksandra, Polańczyk, Andrzej, and Zbiciński, Ireneusz
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- CFD, 3-D hydrodynamic model, effect of wind, and dam reservoir
- Language:
- Slovak
- Description:
- This paper reports the processes by which a single-phase 3-D CFD model of hydrodynamics in a 17-km-long dam reservoir was developed, verified and tested. A simplified VOF model of flow was elaborated to determine the effect of wind on hydrodynamics in the lake. A hexahedral mesh with over 17 million elements and a k-ω SST turbulence model were defined for single-phase simulations in steady-state conditions. The model was verified on the basis of the extensive flow measurements (StreamPro ADCP, USA). Excellent agreement (average error of less than 10%) between computed and measured velocity profiles was found. The simulation results proved a strong effect of wind on hydrodynamics in the lake, especially on the development of the water circulation pattern in the lacustrine zone.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public