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1052. K nedožitým čtyřiaosmdesátinám profesora Jana Buchara
- Creator:
- Antonín Kůrka
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Biologické vědy, Buchar, Jan, 1932-2015, zoologové, zoologists, arachnologie, arachnologové, arachnology, arachnologists, 2, and 57/59
- Language:
- Czech
- Description:
- Antonín Kůrka.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1053. K otázce poddruhů mloka skvrnitého v oblasti Českého a Saského Švýcarska
- Creator:
- Pavel Benda
- Format:
- print, bez média, and svazek
- Type:
- article, text, články, journal articles, model:article, and TEXT
- Subject:
- Biologické vědy, ocasatí, mlok skvrnitý, salamanders, Salamandra salamandra, České Švýcarsko (Česko), Saské Švýcarsko (Německo), Bohemian Switzerland (Czechia), Saxon Switzerland (Germany), 2, and 57/59
- Language:
- Czech
- Description:
- Na základě analýzy kreseb mloků skvrnitých (Salamandra salamandra) v Českém Švýcarsku a přilehlých oblastech byly rozlišeny 3 skupiny kreseb. První skupina odpovídá svou kresbou poddruhu S. s. terrestris (48%), druhá skupina odpovídá poddruhu S. s. salamandra (30%) a třetí skupina vykazuje přechodný charakter (22%). Výskyt poddruhu S.s.t. nebyl dosud v České republice uváděn a proto by bylo vhodné se touto problematikou blíže zaobírat., Three groups were distinguished based on the analysis of colour pattern of European fire salamander (Salamandra salamandra) in Bohemian Switzerland and neighboring areas. The first group corresponds to the subspecies S. s. terrestris (48%), the second group to the subspecies S. s. salamandra (30%), and the third group showed temporary form (22%). Occurrence of the subspecies S. s. terrestris has not yet been recorded in the Czech Republic; therefore it would be appropriate to study this matter further., and Pavel Benda.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1054. K+-p-nitrophenylphosphatase activity in rat brain and liver
- Creator:
- Monika Ďurfinová, Marta Brechtlová, Branislav Líška, and Želmíra Barošková
- Format:
- Type:
- article, články, model:article, and TEXT
- Subject:
- Biochemie. Molekulární biologie. Biofyzika, biochemie, mozek, játra, biochemistry, brain, liver, K+-ATPase, K+-p-nitrophenylphospatase, 2, and 577
- Language:
- English
- Description:
- K+-p-nitrophenylphosphatase (K+pNPPase) is the enzyme, which is considered to be involved in K+-dependent hydrolysis of the phosphoenzyme in the reaction cycle of Na+, K+-ATPase. The aim of our present study was to characterize some features of K+pNPPase in homogenates of the rat brain and liver. We determined p-nitrophenylphosphatase (pNPPase) activity in the presence of various ion combinations (Mg 2++K+, Mg2+, K+). We found a higher total pNPPase activity in the brain (0.8±0.079 nkat/mg protein) than in the liver (0.08±0.01 nkat/mg protein). Contrary to the liver, the main part of the total brain activity was K+-dependent. The activity of K+pNPPase was significantly higher in cerebral cortex homogenates (0.86±0.073 nkat/mg protein) in comparison to those of the whole brain (0.57±0.075 nkat/mg protein). The specific K+pNPPase activity was two times higher in the isolated pellet fraction (0.911±0.07 nkat/mg protein), rich in synaptosomes, compared to the whole brain homogenate (0.57±0.075 nkat/mg protein). Our results demonstrate the high activity of K+pNPPase in the brain tissue and its distribution mainly into the pellet fraction, what might indicate a possible role of K+pNPPase in specific structures of the brain, e.g. in synaptosomes., M. Ďurfinová, M. Brechtlová, B. Líška, Ž. Barošková., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1055. K13 propeller domain mutations and pfmdr1 amplification in isolates of Plasmodium falciparum collected from Thai-Myanmar border area in 2006-2010
- Creator:
- Phompradit, Papichaya, Chaijaroenkul, Wanna, Muhamad, Phunuch, and Na-Bangchang, Kesara
- Format:
- print, počítač, and online zdroj
- Type:
- model:article and TEXT
- Subject:
- malárie, molekulární markery, malaria, molecular markers, falciparum malaria, artemisinin resistance, PF3D7_1343700, sequencing, 2, and 59
- Language:
- English
- Description:
- The K13 propeller domain mutation and pfmdr1 amplification have been proposed as useful molecular markers for detection and monitoring of artemisinin resistant Plasmodium falciparum Welch, 1897. Genomic DNA isolates of P. falciparum was extracted from 235 dried blood spot or whole blood samples collected from patients with uncomplicated falciparum malaria residing in areas along the Thai-Myanmar border during 2006-2010. Nested polymerase chain reaction (PCR) and sequencing were performed to detect mutations in K13 propeller domain of P. falciparum at codon 427-709. Pfmdr1 gene copy number was determined by SYBR Green I real-time PCR. High prevalence of pfmdr1 multiple copies was observed (42.5% of isolates). The presence of K13 mutations was low (40/235, 17.2%). Seventeen mutations had previously been reported and six mutations were newly detected. The C580Y was found in two isolates (0.9%). The F446I, N458Y and P574L mutations were commonly detected. Seven isolates had both K13 mutation and pfmdr1 multiple copies. It needs to be confirmed whether parasites harbouring both K13 mutation and pfmdr1 multiple copies and/or the observed new mutations of K13 propeller domain are associated with clinical artemisinin resistance., Papichaya Phompradit, Wanna Chaijaroenkul, Phunuch Muhamad, Kesara Na-Bangchang., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1056. Kaktusy na mexických ostrovech v okolí Baja California
- Creator:
- Libor Kunte
- Format:
- Type:
- article, články, model:article, and TEXT
- Subject:
- Botanika, kaktusy, flóra, Baja California (Mexiko), 2, and 58
- Language:
- Czech
- Description:
- The occurrence of succulent flora on Santa Catalina, Carmen and Cedros islands around the Baja California peninsula in Mexico is presented. Populations of endemic species of plants and animals are in good condition; except for Ferocactus diguetii subsp. carmenesis on Carmen Island, previously collected and transported to the mainland. and Libor Kunte.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1057. Kam kráčíš, světová ochrano přírody? Ohlédnutí za V. světovým kongresem ochrany přírody
- Creator:
- Jan Plesník
- Format:
- Type:
- article, články, journal articles, model:article, and TEXT
- Subject:
- Životní prostředí a jeho ochrana, IUCN Commission on National Parks and Protected Areas, ochrana přírody, červené knihy, nature conservation, red lists, 2, and 502
- Language:
- Czech
- Description:
- Plesník, Jan.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1058. Kanál pro amonné ionty se podílí na příjmu NH4+ při trávení kořisti u mucholapky podivné
- Creator:
- Lubomír Adamec
- Format:
- bez média and svazek
- Type:
- article, text, články, journal articles, model:article, and TEXT
- Subject:
- Biologické vědy, biologie, masožravé rostliny, trávicí enzymy, fyziologie rostlin, biology, carnivorous plants, digestive enzymes, plant physiology, amonné ionty, mucholapka podivná, 2, and 57/59
- Language:
- Czech
- Description:
- Lubomír Adamec.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1059. Kaolin-based, foliar reflective film protects photosystem II structure and function in grapevine leaves exposed to heat and high solar radiation
- Creator:
- Dinis, L -T., Ferreira, H., Pinto, G., Bernardo, S., Correia, C. M., and Moutinho-Pereira, J.
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- fotosyntéza, photosynthesis, chlorophyll a fluorescence transient, energy flux, Vitis vinifera, 2, and 581
- Language:
- Multiple languages
- Description:
- Extreme conditions, such as drought, high temperature, and solar irradiance intensity, are major factors limiting growth and productivity of grapevines. In a field experiment, kaolin particle film application on grapevine leaves was examined during two different summer conditions (in 2012 and 2013) with the aim to evaluate benefits of this practice against stressful conditions hindering photochemical processes. We used chlorophyll a fluorescence to investigate attached leaves. Two months after the application, during the hottest midday, the kaolin-treated plants showed by the JIP test significantly higher quantum yield of PSII photochemistry, flux ratios, maximum trapped excitation flux of PSI, absorption flux, electron transport flux, maximum trapped energy flux per cross section, and performance index than plants under control conditions in the warmer year. On the contrary, the treated plants showed a lower initial slope of relative variable fluorescence and a decrease in the absorption and electron transport per cross section. The JIP test showed higher efficiency of PSII in the plants treated with kaolin mainly in 2013 (higher temperature and drought). Our results supported the hypothesis that the accumulation of active PSII reaction centres was associated with decreased susceptibility to photoinhibition in the kaolin-treated plants and with more efficient photochemical quenching. Grapevines in the Douro Region seems to profit from the kaolin application., L.-T. Dinis, H. Ferreira, G. Pinto, S. Bernardo, C. M. Correia, J. Moutinho-Pereira., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1060. Karas stříbřitý a jeho příbuzní
- Creator:
- Lukáš Kalous
- Type:
- article, články, journal articles, model:article, and TEXT
- Subject:
- Zoologie, zoologie, ryby, obojživelníci, plazi, molekulární biologie, virologie, imunologie, fyziologie, genetika, fishes, amphibians, reptiles, molecular biology, virology, immunology, physiology, genetics, 2, and 59
- Language:
- Czech
- Description:
- Článek se zabývá taxonomií, reprodukční biologií, fylogenetikou, fylogeografií a introdukční historií ryb rodu karas (Carassius). Článek poskytuje souhrn poznatků, které jsou značně komplikované a spojené s jedinečným způsobem rozmnožování, definicí druhu a nepřesným chápáním biologie a systematiky těchto ryb v minulosti. Celá problematika je ještě daleko od svého kompletního vyřešení, ale současný pohled nám může pomoci v lepší péči o vodní prostředí., This article deals with the taxonomy, reproductive biology, phylogenetics, phylogeography and introduction history of the fishes of the genus Carassius. It summarizes findings associated with their unique mode of reproduction, challenging species delimitation and insufficient understanding of the biology and systematics of these fishes in the past. Deeper insight into the biology of Prussian Carp (Carassius gibelio) will require more research, but the available results can improve our understanding and management of the aquatic environment., Lukáš Kalous., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public