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41. České vydání encykliky Laudato si´

Creator:
Svoboda, Luděk
Format:
print, bez média, and svazek
Type:
article, zprávy, model:article, and TEXT
Subject:
Životní prostředí a jeho ochrana, papež, František, 1936-, papežské dokumenty, smysl života, člověk a životní prostředí, papal documents, sense of life, man and environment, 2, and 502
Language:
Czech
Description:
[Luděk Svoboda]. and Autor používá šifru lsd
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

42. České zmije stojí za pozornost

Creator:
Jiří Moravec and Šmíd, Jiří
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, biologie, zmije, kladistika, fylogeneze, Vipera, biology, cladistics, phylogeny, Česko, Czechia, zmije obecná, 2, and 57/59
Language:
Czech
Description:
Článek shrnuje současné názory na vnitrodruhové genetické rozrůznění a taxonomii zmije obecné (Vipera berus). Zvláštní pozornost je věnována genetické příslušnosti populací českých zmijí., This article summarizes contemporary knowledge of the intraspecific genetic differentiation and taxonomy of the Common Adder (Vipera berus). Special attention is paid to the genetic status of the Czech adders., and Jiří Moravec, Jiří Šmíd.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

43. Československý endemit Daphnia hrbaceki: jak jsme objevili "hrbáče od Bezdězu"

Creator:
Adam Petrusek and Petr Jan Juračka
Format:
print, bez média, and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, perloočky, vodní bezobratlí, Kokořín (Česko : oblast), Kokořín Region (Czechia), zooplanktonní korýši, nové druhy, Daphnia hrbaceki, 2, and 57/59
Language:
Czech
Description:
Perloočky rodu Daphnia jsou intenzivně studovaní vodní bezobratlí. Proto byl pro nás velkým překvapením objev pro vědu nového druhu tohoto rodu v tůni na Kokořínsku. Druh byl pojmenován po významném českém hydrobiologovi Jaroslavu Hrbáčkovi, ale jeho jméno odkazuje i na hrbatý tvar těla. Jeho doposud známé lokality jsou pouze v Čechách a na Slovensku., Species of water fleas that belong to the genus Daphnia have been used intensively in studies as “model organisms”. The discovery of a new Daphnia species in a pool in Central Bohemia was, therefore, a surprise. All known localities of this species, which we named after the prominent Czech hydrobiologist Jaroslav Hrbáček, are restricted to Czechia and Slovakia., and Adam Petrusek, Petr Jan Juračka.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

45. Cestou zážitkové pedagogiky

Creator:
Čekanová, Markéta
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, Techmania science center (projekt), biologie, zážitková pedagogika, studium a výuka, biology, experience pedagogy, study and teaching, Plzeň (Česko), Plzeň (Czechia), vědecké parky, výuka, 2, and 57/59
Language:
Czech
Description:
Markéta Čekanová.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

46. Changes of extracellular matrix of rat cornea after exposure to hypoxia

Creator:
Gabriela Mahelková, Jiří Korynta, Moravová, A., Jana Novotná, and Richard Vytášek
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Biochemie. Molekulární biologie. Biofyzika, oftalmologie, rohovka, hypoxie, ophthalmology, cornea, hypoxia, metalloproteinase, oxidative damage, nitrotyrosine, 2, and 577
Language:
English
Description:
The purpose of the study was to check whether hypoxia of corneal tissue increases the collagenolytic activity due to release of reactive oxygen and nitrogen species. Rats were exposed to hypoxia 10 % O2 for 4, 14, and 21 days. The radical tissue injury was measured by the level of nitrotyrosine and changes in the lipoperoxide-related fluorophores. Collagen protein composition was analyzed by slab gel electrophoresis. The activity of gelatinolytic enzymes was studied using the zymography. The vascularization of the corneas was measured. We found no differences in the corneal tissue in the gel electrophoretic profile of collagenous proteins and gelatinolytic activity between normoxic and hypoxic rats. We did not find any sign of radical tissue injury. There were no changes in the vascularization of corneas after exposition to hypoxia. The environmental 10 % hypoxia does not induce radical tissue injury and an increase of collagenolytic activity in the rat cornea., G. Mahelková, J. Korynta, A. Moravová, J. Novotná, R. Vytášek, J. Wilhelm., and Obsahuje bibliografii a bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

47. Characteristics of the compensatory renal growth of the remnant embryonic chick kidneys

Creator:
Klusoňová, P. and Zdeňka Zemanová
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Biochemie. Molekulární biologie. Biofyzika, fyziologie, embryologie, ledviny, physiology, embryology, kidneys, chick embryo, unilateral renal agenesis, remnant mesonephros, compensatory renal growth, DNA/protein ratio, 2, and 577
Language:
English
Description:
Growth of the remnant embryonic kidney (the mesonephros), as expressed by wet weight, was more rapid in the chick embryos with experimentally induced unilateral renal agenes is compared to controls. The difference was significant between embryonic days 8-12, when the doubled weights of remnant kidneys were increased compared with the weights of paired control kidneys. The excessive growth of the mesonephros ceased on day 14, when the normal physiological regression of the embryonic kidney begins. In the definitive kidney, the metanephros, no significant differences in weights of the control vs. remnant metanephros were found on days 10-14. The characteristics of increased mesonephric growth were evaluated by determination of DNA/protein ratios in homogenates of the kidneys. Significant cellular hypertrophy was found in both the mesonephros and metanephros of the embryos with URA on day 10. Additionally, a non-significant cellular hyperplasia was also revealed in the remnant mesonephros on day 8. This gives evidence that the growth stimuli to the mesonephroi were probably strongest between days 8-10 and that they manifested in the remnant mesonephros only. and Obsahuje bibliografii a bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

48. Chronic oral administraton of beta-adrenoceptor agonist clenbuterol affects myosin heavy chain (MHC) expression in adult mouse heart

Creator:
Patiyal, Som N. and Sharma, S.
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Biologické vědy, fyziologie, srdce, physiology, heart, clenbuterol, myosin heavy chain isoforms, left ventricle, actomyosin ATPase, cardiac muscle contraction, 2, and 57/59
Language:
English
Description:
The aim of this study was to analyze the effects of chronic administration of the β-adrenoceptor agonist clenbuterol (2 mg/kg body weight/day for a period of 30 days) on the major contractile protein (myosin) in the left ventricular muscle of the adult mouse heart. Separation of myosin heavy chain (MHC) isoforms on 7.5 % glycerol SDS-PAGE and subsequent quantification of the gels by laser densitometry showed a 6.5-fold increase in the β-isoform of MHC in the clenbuterol-treated group. The α: β ratio of these two isoforms in the control group was 98.16±0.14 %: 1.83±0.14 %, whereas in the treated group it was 88.05±1.15 %: 11.95±1.15 %. Actomyosin ATPase activity assay demonstrated a significant (20 %) decline in ATPase activity of the tissue in the β-agonist-treated group. These results suggest that chronic clenbuterol treatment is capable to induced the transformation of MHC isoforms increasing the slow β-MHC isoform, which may contribute to the altered contractile mechanics of clenbuterol-treated hearts., S. N. Patiyal, S. Sharma., and Obsahuje bibliografii a bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

49. Chrpy - botanická noční můra?: o jejich diverzitě, systematice a hybridizaci

Creator:
Petr Koutecký
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, biologie, botanika, pěstitelství, fyziologie rostlin, botany, biology, horticultural education, plant physiology, hybridizace rostlin, polyploidie, chrpy, Centaurea, 2, and 57/59
Language:
Czech
Description:
Článek přestavuje taxonomicky problematický rod chrpa z čeledi Asteraceae. Jsou diskutovány současné pohledy na vymezení a vnitřní členění rodu založené na molekulárních znacích. Dále je popsána problematika hybridizace, která je v rodu velmi častá, a její souvislost s polyploidií (druhy stejné ploidie se často kříží za vzniku rozsáhlých a variabilních hybridních rojů, zatímco mezi ploidiemi je silná reprodukční bariéra)., Centaurea is a taxonomically critical genus from the Asteraceae family. Current delimitation of the genus and its internal classification based on molecular data are discussed. Hybridization and polyploidy are common in Centaurea. The frequency of hybridization depends on ploidy levels of the taxa (homoploid taxa usually hybridize easily and form extensive and variable hybrid swarms, while heteroploid taxa are reproductively strongly isolated)., and Petr Koutecký.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

50. Co je nového v archeogenetice. Stárnoucí Adam a jeho (ne)zdatní synové

Creator:
Viktor Černý
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, biologie, molekulární biologie, genetika člověka, evoluční genetika, genealogie, biology, molecular biology, human genetics, evolutionary genetics, genealogy, archeogenetika, globální genealogie, archaeogenetics, global genealogy, 2, and 57/59
Language:
Czech
Description:
Za posledních několik let byla publikována řada významných archeogenetických studií týkajících se datování a geografické lokalizace posledního společného předka lidského chromozomu Y. Je to dáno dramatickým rozvojem molekulárně biologických technik, díky nimž je dnes možné přečíst daleko větší objem dat, než tomu bylo dříve. Dozvěděli jsme se, že „Y chromozomový Adam“ bude asi nakonec starší než „mitochondriální Eva“ a že jeho synové prodělali mnohem bouřlivější demografický vývoj než dcery Eviny., Several important archaeogenetic studies dealing with age estimates and the geographical locations of the last common ancestor of our Y chromosome have been published over the past few years. This is due to the dramatic development of molecular biological techniques, which made it possible to read a much larger amount of data than was possible before. We learned that the "Y chromosome Adam" might be even older than "mitochondrial Eve" and that his sons went through a much more complex demographic history than Eve’s daughters., and Viktor Černý.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public