Search

Start Over Format bez média Type journal articles

301. Pozapomenuté výročí: 25 let startu nové strategie v přístupu k životnímu prostředí

Creator:
Pavel Kovář
Format:
print, bez média, and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, Československá biologická společnost., Ekologická sekce, udržitelný rozvoj, výročí, ekologie, sustainable development, anniversaries, ecology, 2, and 57/59
Language:
Czech
Description:
Pavel Kovář.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

302. Poznámky k druhové a ekologické variabilitě gekonů Maroka

Creator:
Andrej Funk, Vladimír Vrabec, and Velechovský, Marek
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, biologie, gekoni, gekonovití, Gekkoninae, biology, geckos, Maroko, Morocco, kryptické druhy, cryptic species, 2, and 57/59
Language:
Czech
Description:
Maroko patří mezi státy ve Středozemí, kde se vyskytuje bohatá diverzita gekonů. Najdeme zde i několik endemických poddruhů, druhů a rodů. Nedávné molekulárně biologické studie naznačují, že některé populace mohou představovat kryptické druhy, tradičními metodami nerozlišované a dosud nepopsané., Morocco is one of the Mediterranean states with a rich diversity of geckos, including several endemic subspecies, species and genera. Recent molecular biological studies indicate that some populations may comprise cryptic species, not distinguished by traditional methods and previously not recognized., and Andrej Funk, Vladimír Vrabec, Marek Velechovský.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

303. Pozoruhodné námluvy našich slíďáků rodu Alopecosa

Creator:
Just, Pavel
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Zoologie, entomologie, pavouci, rozmnožování (biologie), spiders, entomology, reproduction, Česko, Czechia, slíďáci, Alopecosa, 2, and 59
Language:
Czech
Description:
There are 15 members of the Wolf Spiders genus Alopecosa in the Czech Republic, most of which are rare and stenoecious. Although they have been studied for a long time, we do not have much information about their biology and reproduction. Members of this genus show a large variability in courtship and copulatory behaviour., K zajímavým rodům slíďáků náleží rod Alopecosa, na území České republiky známe výskyt 15 druhů rodu. Ačkoli ojedinělé záznamy o biologii a taxonomii rodu máme sice už z 18. stol., jejich studium pokračuje zejména v dnešní době, kdy se do popředí dostává výzkum rozmnožování., and Pavel Just.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

304. Pozvánka na výstavu do Průhonic: k oslavám 125. výročí založení ČAVU

Creator:
Jan Krekule
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, Ústav experimentální botaniky (Akademie věd ČR), Botanický ústav (Akademie věd ČR), Svět rostlin - od poznání k využití (2014 : Průhonicke, Česko), biologie, výstavy, botanika, exhibitions, biology, botany, 2, and 57/59
Language:
Czech
Description:
Jan Krekule.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

305. Praktická cvičení z biologie - jak a proč je vyučovat?

Creator:
Janštová, Vanda
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, biologie, studium a výuka, praktické činnosti, biology, study and teaching, practical activities, praktická cvičení, praktika, didaktika biologie, 2, and 57/59
Language:
Czech
Description:
Vanda Janštová.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

306. Pražská škola ukrajinských exilových básníků

Creator:
Alena Morávková
Format:
print, bez média, and svazek
Type:
article, biography, články, journal articles, model:article, and TEXT
Subject:
Literatura. Literární život, Malanjuk, Jevhen, 1897-1968, Kandyba, Oleh, 1907-1944, Teliha, Olena, 1906-1942, exilová literatura, ukrajinští básníci, exilový kulturní život, exiles' writings, Ukrainian poets, cultural activities in exile, 11, and 82
Language:
Czech
Description:
Alena Morávková.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

307. Preejection period as a sympathetic activity index: a role of confounding factors

Creator:
Krohova, J., Czippelova, B., Turianikova, Z., Želmíra Lazárová, Ingrid Tonhajzerová, and Michal Javorka
Format:
print, bez média, and svazek
Type:
article, články, journal articles, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, fyziologie, physiology, preejection period, impedance cardiography, head-up tilt, mental stress, thoracic fluid content, systemic vascular resistance, 14, and 612
Language:
English
Description:
n previous studies, one of the systolic time intervals - preejection period (PEP) - was used as an index of sympathetic activity reflecting the cardiac contractility. However, PEP could be also influenced by several other cardiovascular variables including preload, afterload and diastolic blood pressure (DBP). The aim of this study was to assess the behavior of the PEP together with other potentially confounding cardiovascular system characteristics in healthy humans during mental and orthostatic stress (head-up tilt test - HUT). Forty-nine healthy volunteers (28 females, 21 males, mean age 18.6 years (SD=1.8 years)) participated in the study. We recorded finger arterial blood pressure by volume-clamp method (Finome ter Pro, FMS, Netherlands), PEP, thoracic fluid content (TFC) - a measure of preload, and cardiac output (CO) by impedance cardiography (CardioScreen ®2000, Medis, Germany). Systemic vascular resistance (SVR) - a measure of afterload - was calculated as a ratio of mean arterial pressure and CO. We observed that during HUT, an expected decrease in TFC was accompanied by an increase of PEP, an increase of SVR and no significant change in DBP. During mental stress, we observed a decrease of PEP and an increase of TFC, SVR and DBP. Correlating a change in assessed measures (delta values) between mental stress and previous supinerest, we found that ΔPEP correlated negatively with ΔCO and positively with ΔSVR. In orthostasis, no significant correlation between ΔPEP and ΔDBP, ΔTFC, ΔCO, ΔMBP or ΔSVR was found. We conclude that despite an expected increase of sympathetic activity during both challenges, PEP behaved differently indicating an effect of other confounding factors. To interpret PEP values properly, we recommend simultaneously to measure other variables influencing this cardiovascular measure., J. Krohova, B. Czippelova, Z. Turianikova, Z. Lazarova, I. Tonhajzerova, M. Javorka., and Obsahuje bibliografii
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

308. Prenatal exposure to bisphenols and parabens and impacts on human physiology

Creator:
Lucie Kolátorová Sosvorová, Michaela Dušková, Jana Vítků, and Luboslav Stárka
Format:
print, bez média, and svazek
Type:
article, články, journal articles, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, těhotenství, pregnancy, fetus, endocrine disruptor, bisphenol, paraben, 14, and 612
Language:
English
Description:
In modern societies, living organisms are exposed daily to multiform pollution from industrial chemical products. Some of these substances have been shown to affect the endocrine system, and have been termed endocrine disruptors (EDs). Bisphenol A (BPA), which can leach from plastics, and parabens, used in cosmetic products, are among the most well-studied. Prenatal development is a vulnerable phase of human life, and disruptions during this period may have lifelong consequences. Since EDs are known to cross the placental barrier and BPA may accumulate in the fetus, "BPA-free" products have been introduced to the market. However, such products often contain alternative bisphenols (e.g. BPS, BPF) that have not yet been extensively examined or regulated. Moreover, alternative bisphenols often occur together with BPA. The human organism is thus exposed to a mixture of EDs, some of which can have additive or synergic effects. Recent findings have also shown that paraben exposure can alter bisphenol pharmacokinetics. Taking into account the widespread occurrence of various EDs and the potential multiplicity of their effects, doses of EDs currently considered safe may not actually be as safe as they appear, especially during pregnancy., L. Kolatorova, M. Duskova, J. Vitku, L. Starka., and Obsahuje bibliografii
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

309. Příběh vitamínu D

Creator:
Petr Šíma and Bohumil Turek
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, Kodíček, Egon, 1908-1982, biologie, vitamin D, metabolismus, biology, metabolism, křivice, nedostatek vitaminu D, tranasport vitaminu D, rachitis, rickets, transport of vitamin D, lack of vitamin D, 2, and 57/59
Language:
Czech
Description:
Autoři pojednávají o vitamínu D, který má mezi ostatními vitamíny specifické postavení, poněkud z jiného úhlu pohledu. Přibližují jeho evoluční původ a historii jeho objevování. Nedostatek vitaminu D vyvolává křivici, nemoc, která je doložena už od starověku. V této souvislosti upozorňují autoři na světově uznávané zásluhy významného, dnes už téměř zapomenutého českého vědce E. H. Kodíčka. Přehledně také popisují metabolismus a transport vitaminu D v organismu a upozorňují, že vitamin D také hraje důležitou úlohu při vzniku chronických nesdělných chorob, jejichž počet celosvětově stále vzrůstá., The authors discuss vitamin D, which has a special position among vitamins, from a somewhat different perspective. They clarify its evolutionary origin and the history of its discovery. A deficiency of vitamin D causes rickets, a disease that has been documented since antiquity. In this context, the authors draw attention to a nearly forgotten Czech scientist E. H. Kodíček of significant merit. They also briefly describe the metabolism and transport of vitamin D in the body and point out that vitamin D also plays an important role in the development of non-communicable chronic diseases, the number of which is increasing worldwide., and Petr Šíma, Bohumil Turek.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public