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29942. Populations of species of Pilosella in ruderal habitats in the city of Prague: frequency, chromosome numbers and mode of reproduction
- Creator:
- Křišťálová, Veronika, Chrtek, Jindřich, Krahulcová, Anna, Bräutigam, Siegfried, and Krahulec, František
- Type:
- article and TEXT
- Subject:
- chromosome numbers, DNA ploidy level, Pilosella, and reproductive mode
- Language:
- English
- Description:
- Populations of Pilosella (Hieracium subgenus Pilosella) at ruderal localities were investigated in an urban area (Prague City) with respect to their distribution, variation in DNA ploidy level/chromosome number and mode of reproduction. The following species, hybridogenous species or hybrids (with ploidy level/chromosome number and mode of reproduction) were found: P. aurantiaca, P. caespitosa (4x, 5x), P. cymosa subsp. vaillantii (5x), P. officinarum (2n = 36, sexual; 2n = 54, sexual; 2n = 63), P. piloselloides subsp. bauhinii (2n = 45, 54; both apomictic), P. piloselloides subsp. praealta (5x; apomictic), P. brachiata (4x; sterile), P. densiflora, P. flagellaris, P. floribunda, P. erythrochrista, P. glomerata (5x; apomictic), P. leptophyton (5x; apomictic), P. rothiana (4x, apomictic), P. setigera, P. visianii (4x; apomictic), P. ziziana (4x, apomictic) and the previously undescribed hybridogenous type P. piloselloides × P. setigera (5x, apomictic). Pilosella visianii is reported from the Czech Republic for the first time. New habitats resulting from highway construction are suitable for Pilosella species. Many previously rare types, such as P. rothiana, can colonize these habitats and spread, not only locally, but also throughout the whole country.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
29943. Populist Antisemitism :
- Creator:
- Szabó, Miloslav,
- Type:
- text and studie
- Subject:
- Filozofie, Masaryk, Tomáš Garrigue,, antisemitismus, populismus, myšlení filozofické, myšlení historické, světové dějiny od r. 1918 do současnosti, antisemitismus, perzekuce, pogromy, Československo 1918-1992, dějiny ideí, ideologie, and historiografie, vědecké projekty
- Language:
- English
- Rights:
- unknown
29944. Porcelánová manufaktura ROYAL DUX BOHEMIA, a. s. 150 let ve službách křehkosti a krásy /
- Creator:
- Dvořáková, Jaroslava
- Publisher:
- Regionální muzeum v Teplicích,
- Subject:
- porcelánky, porcelán, české země 1848-1918, Československo 1918-1992, and hmotná kultura, umělecká řemesla
- Language:
- Czech, English, and German
- Description:
- [Částečně souběžný angl. a něm. text]
- Rights:
- unknown
29945. Porcine dorsal root ganglia ovarian neurons are affected by long lasting testosterone treatment
- Creator:
- Jana, B., Palus, K., Meller, K., and Całka, J.
- Type:
- article, model:article, and TEXT
- Subject:
- Testosterone, Dorsal root ganglia, Ovarian neurons, and Gilts
- Language:
- English
- Description:
- We studied the effect of testosterone overdose on the number, distribution and chemical coding of ovarian neurons in the dorsal root ganglia (DRGs) in pigs. On day 3 of the estrous cycle, the ovaries of both the control and experimental gilts were injected with retrograde tracer Fast Blue. From day 4 of the estrous cycle to the expected day 20 of the second studied cycle, the experimental gilts were injected with testosterone, while the control gilts received oil. After the completion of the protocol the Th16-L5 DRGs were collected. Injections of testosterone increased the testosterone (~3.5 fold) and estradiol-17β (~1.6 fold) levels in the peripheral blood, and reduced the following in the DRGs: the total number of the Fast Blue-positive perikarya, the population of perikarya in the L2-L4 ganglia, and the numbers of SP+/CGRP+, SP+/PACAP+, SP+/nNOS+ and SP-/nNOS+ perikarya. In thetestosterone-injected gilts, the populations of SP+/CGRP-, small and large androgen receptors-expressing perikarya were increased. These results suggest that elevated androgen levels during pathological states may regulate the transmission of sensory modalities from the ovary to the spinal cord, and antidromic regulation of the ovarian functions.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
29946. Porhphyrins & Pophyrias 2003: Prague, September 21-24, 2003
- Type:
- article, model:article, and TEXT
- Language:
- English
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
29947. Porosity changes induced by salt weathering of sandstones, Bohemian Cretaceous Basin, Czech Republic
- Creator:
- Jiří Adamovič, Mikuláš, Radek, Böhmová, Vlasta, and Jana Schweigstillová
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, pórovitost, pískovce, porosity, sandstones, honeycombs, rock crust, salt weathering, case hardening, 7, and 551
- Language:
- English
- Description:
- Different types of rock crusts and the underlying unweathered sandstone were sampled in the Bohemian Cretaceous Basin, Czech Republic. Structure and mineral composition of the samples were studied using optical microscopy, scanning electron microscopy with EDAX, and X-ray diffraction. Pore parameters were determined using mercury intrusion porosimetry/ helium pycnometry. Principal salts identified in the rock crusts and in the efflorescences are gypsum and alums. Two types of rock crusts were distinguished on morphological basis: 1. patterned rock crusts with a variety of weathering forms (honeycombs, wandkarren), and 2. armoured rock crusts with a relatively smooth, hardened layer. Patterned rock crusts on medium- to coarse-grained quartzose sandstones show an increase in the size of macropores relative to unweathered sandstone, which mostly implies an increase in total effective porosity. This is explained by the subflorescent growth of salt crystals, the force of which leads to the loss of contact among grains, pore widening, and granular disintegration. Armoured rock crusts on fine-grained clayey sandstone show a reduced volume and size of macropores, as these are filled with clay mineral aggregates and gypsum crystals. A prominent increase in the volume of micropores is due to secondary porosity in kaolinite and corrosion of feldspar grains. Insufficient passability of macropores in the armoured layer for pore waters shifts the evaporation front deeper into the rock. This results in contour scaling as the main process of rock-surface degradation, as opposed to granular disintegration on patterned rock crusts., Jiří Adamovič, Radek Mikuláš, Jana Schweigstillová and Vlasta Böhmová., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
29948. Porous medium equation and fast diffusion equation as gradient systems
- Creator:
- Littig, Samuel and Voigt, Jürgen
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- mathematics, porous medium equation, gradient system, fast diffusion, asymptotic behaviour, order preservation, 13, and 51
- Language:
- English
- Description:
- We show that the Porous Medium Equation and the Fast Diffusion Equation, \dot u - \Delta {u^m} = f with m\in (0, \infty ), can be modeled as a gradient system in the Hilbert space H^{-1}(\Omega ), and we obtain existence and uniqueness of solutions in this framework. We deal with bounded and certain unbounded open sets \Omega \subset \mathbb{R}^{n} and do not require any boundary regularity. Moreover, the approach is used to discuss the asymptotic behaviour and order preservation of solutions., Samuel Littig, Jürgen Voigt., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
29949. Porovnání dvou nejčastějších metod na stanovení celkového bilirubinu u novorozenců
- Creator:
- Šálek, Tomáš, Macko, Josef, Šafařík, P., and Pšenčík, M.
- Format:
- print, text, and regular print
- Type:
- model:article, article, Text, srovnávací studie, and TEXT
- Subject:
- novorozenecká žloutenka--diagnóza, bilirubin--analýza--diagnostické užití--krev, spektrofotometrie--metody--přístrojové vybavení--využití, hemolýza, referenční standardy, biochemická analýza krve--metody--využití, retrospektivní studie, průřezové studie, and novorozenec
- Language:
- Czech and English
- Description:
- Cíl: Porovnat stanovení celkového bilirubinu metodou přímé spektrofotometrie v plné žilní krvi a metodou Jendrassik-Gróf v séru žilní krve u 437 novorozenců narozených v Krajské nemocnici T. Bati ve Zlíně (KNTB). Typ studie: retrospektivní průřezová. Metody: Přímá spektrofotometrie plné žilní krve na analyzátoru ABL 835 firmy Radiometer a spektrofotometrické stanovení v séru žilní krve metodou Jendrassik-Gróf na analyzátoru Architect firmy Abbott. Obě metody mají metrologickou návaznost měření na referenční materiál NIST SRM 916a. Výsledky: Medián (mezikvartilové rozpětí) sérového bilirubinu byl 228 μmol/l (186-263), medián (mezikvartilové rozpětí) bilirubinu v plné krvi byl 237 μmol/l (192-287). Wilcoxonův párový test prokázal mezi mediány statisticky významný rozdíl (p<0,0001). Blandův-Altmanův rozdílový graf a Passing Bablokova regrese ukazují, že především v oblasti koncentrací nad 280 μmol/l měří přímá spektrofotometrie celkového bilirubinu v plné žilní krvi vyšší výsledky než stanovení v séru žilní krve (p<0,0001). Závěr: Při koncentraci bilirubinu nad 280 μmol/l měří přímá spektrofotometrie v plné žilní krvi výrazně vyšší výsledky než stanovení v séru (p<0,0001). Hodnoty nad 280 μmol/l je tedy nutné potvrdit měřením v séru žilní krve v biochemické laboratoři., Aim: The aim of the study is to compare determination of total bilirubin by direct spectrophotometric method in whole venous blood and by indirect Jendrassik-Gróf method in venous serum in 437 newborns born in Tomas Bata hospital in Zlin. Design: retrospective cross section design. Methods: Determination of total bilirubin by direct spectrophotometric method in whole venous blood was performed on Radiometer ABL 835 analyzer. Determination of total bilirubin in venous serum by indirect Jendrassik-Gróf was performed on Abbott Architect analyzer. Both methods are metrologically traceable to reference material NIST SRM 916a. Results: The median (interquartile range) of serum venous bilirubin was 228 μmol/L (186-263). The median of venous whole blood total bilirubin was 237 μmol/L (192-287). The significant difference between medians was found (p<0,0001). Bland- Altman plot and Passing-Bablok regression show that direct spectrophotometric method of whole venous blood gave higher results than Jendrassik-Gróf test in venous serum mainly in the concentration range above 280 μmol/l (p<0,0001). Conclusions: Direct spectrophotometric results of total bilirubin in whole venous blood in the concentration range above 280 umol/l should be confirmed by indirect serum determination in clinical biochemistry laboratory., Šálek T., Macko J., Šafařík P., Pšenčík M., and Literatura
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
29950. Porovnání klasického rekonstrukčního algoritmu filtrované zpětné projekce (FBP) a algoritmu iterativní rekonstrukce (IRIS)
- Creator:
- Kozubíková, Petra and Horák, Martin
- Type:
- model:article, article, Text, and TEXT
- Subject:
- diagnostické zobrazování--metody--přístrojové vybavení--trendy, tomografie rentgenová počítačová--metody--trendy, obrazy - zpracování pomocí počítače--metody--trendy--využití, dávka záření, statistika jako téma, algoritmy, artefakty, software--trendy, řízení kvality, tělesná hmotnost, výsledky a postupy - zhodnocení (zdravotní péče), lidé, CT, and efektivní dávka
- Language:
- Czech and English
- Description:
- Cíl. Cílem studie bylo posoudit možnosti IRIS (iterativní rekonstrukce v obrazovém prostoru) algoritmu z hlediska redukce šumu v obraze a efektivní dávky. Metoda. Bylo vyhodnoceno celkem 85 pacientů, kteří podstoupili CT vyšetření (plic, břicha a mozku) s rekonstrukcí snímků pomocí IRIS algoritmu, a podobná skupina 95 pacientů, jejichž snímky byly rekonstruovány filtrovanou zpětnou projekcí (FBP). Referenční součin proudu a expozičního času byl pro skupinu s IRIS algoritmem v původních užívaných protokolech snižován tak, aby kvalita snímku na základě subjektivního posouzení radiologa byla zachována. Obě skupiny byly porovnány z hlediska množství šumu na snímku, poměru signálu a šumu a efektivní dávky, kterou pacient během vyšetření obdrží. Výsledky. Ukázalo se, že u vyšetření břicha je možné radiační zátěž pacienta snížit až o 50 %, aniž by došlo ke zhoršení kvality snímku. Na druhou stranu pro vyšetření mozku se podařilo dosáhnout snížení průměrné efektivní dávky pouze o 23 %. Závěr. Z tohoto důvodu by měla obdobná měření a optimalizace vždy předcházet uvedení nového rekonstrukčního algoritmu do klinické praxe., Aim. The aim of this study was to assess the possibilities of IRIS (Iterative reconstruction in Image Space) algorithm in noise reduction and potential dose reduction. Method. A total of 85 patients clinically underwent CT examination (chest, abdomen, brain) with IRIS reconstruction and similar groups of 95 patients with Filtered Back Projection (FBP) reconstruction were evaluated. The reference tube current product in original CT protocols was modified for IRIS algorithm according to the subjective image quality. Two reconstruction algorithms were compared in terms of image noise, signal to noise ratio and effective dose. Results. It was demonstrated that with the novel approach the mean effective dose reduction up to 50% for CT examination of the abdomen did not lead to image quality degradation. However, to retain the quality of CT images of the brain it was accomplished mean effective dose reduction only of 23%. Conclusion. For this reason such measurements and similar optimization should precede to introduction of any new reconstruction algorithm into clinical routine., Petra Kozubíková, Martin Horák, and Lit.: 6
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public