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Morphological characteristics of blood cells in monitor lizards:is erythrocyte size linked to actual body size?

Integrative Zoology 2013年第1期8卷 39-45页

作者： Petra FRÝDLOVÁ Jan HNÍZDO lenka chylíková OlgaŠIMkovÁ Veronika CIKÁNOVÁ Petr VELENSKÝ Daniel FRYNTA Department of Zoology Charles University in PraguePragueCzech Republic Animal Clinic PragueCzech Republic Prague Zoo PragueCzech Republic

Blood cell morphology and count are not uniform across ***,between-species comparisons revealed that the size of red blood cells is associated with body size in some lizard taxa,and this finding was interpreted in the context of the metabolic *** the present study,we examined the numbers and the size of blood cells in 2 species of monitor lizards,the mangrove-dwelling monitor(Varanus indicus)and the savannah monitor(***),and we compared these traits in individuals of different body *** results revealed that during the course of ontogeny,the size of red blood cells increases with body *** the mass-specific metabolic rate decreases with body size and the cell volume-to-surface ratio decreases with the cell size,changes in the erythrocyte size might be the result of oxygen transport adjustment.

关键词： blood parameters body size erythrocyte size metabolic theory Varanidae

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The impact of preozonation on the coagulation of cellular organic matter produced by Microcystis aeruginosa and its toxin degradation

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Journal of Environmental Sciences 2020年第12期32卷 124-133页

作者： Magdalena Barešová Jana Naceradská Katerina Novotná lenkaCermáková Martin Pivokonský Institute of Hydrodynamics of the Czech Academy of Sciences Pod Patankou 516612 Prague 6Czech Republic

Ozonation pretreatment is typically implemented to improve algal cell coagulation. However, knowledge on the effect of ozonation on the characteristics and coagulation of associated algal organic matter, particularly cellular organic matter(COM), which is extensively released during algal bloom decay, is limited. Hence, this study aimed to elucidate the impact of ozonation applied before the coagulation of dissolved COM from the cyanobacteria Microcystis aeruginosa. Additionally, the degradation of microcystins(MCs) naturally present in the COM matrix was investigated. A range of ozone doses(0.1–1.0 mg O3/mg of dissolved organic carbon – DOC) and ozonation pH values(pH 5, 7 and 9) were tested, while aluminium and ferric sulphate coagulants were used for subsequent coagulation. Despite negligible COM removal, ozonation itself eliminated MCs, and a lower ozone dose was required when performing ozonation at acidic or neutral pH(0.4 mg O3/mg DOC at pH 5 and 7 compared to 0.8 mg O3/mg DOC at pH 9). Enhanced MC degradation and a similar pattern of pH dependence were observed after preozonation-coagulation, whereas coagulation alone did not sufficiently remove MCs. In contrast to the benefits of MC depletion, preozonation using ≥0.4 mg O3/mg DOC decreased the coagulation efficiency(from 42%/48% to 28%–38%/41%–44% using Al/Fe-based coagulants), which was more severe with increasing ozone dosage. Coagulation was also influenced by the preozonation pH, where pH 9 caused the lowest reduction in COM removal. The results indicate that ozonation efficiently removes MCs, but its employment before COM coagulation is disputable due to the deterioration of coagulation.

关键词： Algal organic matter Coagulation Microcystins Microcystis aeruginosa Ozonation

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多壁纳米碳管对磷酸铁锂正极材料热稳定性及表面形貌的影响(英文)

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新型炭材料 2013年第1期28卷 1-7页

作者： Mária Filkusová Andrea Fedorková Renáta Oriňáková Andrej Oriňák Zuzana Nováková lenka Skantárová Department of Physical and Theoretical Chemistry Faculty of Science Comenius University Mlynská|Dolina SK-842 15 Bratislava 4 Slovak Republic Department of Physical Chemistry Faculty of Science P.J. afárik University Moyzesova 11 SK-04154 Koice Slovak Republic Department of Electrical and Electronic Technology Faculty of Electrical Engineering and Communication Brno University of Technology Czech Republic Department of Analytical Chemistry Faculty of Science Comenius University Mlynská|Dolina SK-842 15 Bratislava 4 Slovak Republic

合成了一种新型的LiFePO4/多壁纳米碳管(MWCNTs)复合正极材料。通过MWCNTs和PPy-PEG粘结剂有机地在LiFePO4颗粒间构成三维网络导电结构,并借助SEM、TGA和高分辨裂解气相色谱,研究了LiFePO4-MWCNT正极材料的表面形貌和热稳定性。结果表明... 详细信息

合成了一种新型的LiFePO4/多壁纳米碳管(MWCNTs)复合正极材料。通过MWCNTs和PPy-PEG粘结剂有机地在LiFePO4颗粒间构成三维网络导电结构,并借助SEM、TGA和高分辨裂解气相色谱,研究了LiFePO4-MWCNT正极材料的表面形貌和热稳定性。结果表明,500℃下该材料的热分解程度非常小,说明MWCNTs和PPy-PEG的复合是提高LiFePO4正极材料的热稳定性和改善表面形貌的有效途径。

关键词：多壁纳米碳管多吡咯磷酸铁锂锂离子电池

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乙烷氧化脱氢用Ni/Al_2O_3催化剂中活性镍物种前驱体(英文)

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催化学报 2013年第10期34卷 1905-1913页

作者： Lucie Smoláková árka Botková Libor apek Peter Priecel Agnieszka Soltysek Martin Kout lenka Matějová Department of Physical Chemistry Faculty of Chemical TechnologyUniversity of Pardubice Nanotechnology Centre V B-Technical University of Ostrava

Ni/Al2O3 catalysts for oxidative dehydrogenation(ODH) of ethane were prepared by impregnation of Al2O3 with nickel acetate or nickel nitrate,and by mechanical mixing of NiO and *** Ni-based catalysts were characterized by N2 adsorption-desorption,X-ray diffraction,diffuse reflectance UV-visible diffuse reflectance spectroscopy,and temperature-programmed reduction of *** results showed that formation of crystalline NiO particles with a size of < 8 nm and/or non-stoichiometric NiO species in the Ni/Al2O3 catalysts led to more active species in ODH of ethane under the investigated reaction *** contrast,tetrahedral Ni species present in the catalysts led to higher selectivity for *** of large crystalline NiO particles(22-32 nm) over Ni/Al2O3 catalysts decreased the selectivity for ethene.

关键词： Alumina Ethane Oxidative dehydrogenation Nickel species

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Weyl Group Orbit Functions in Image Processing

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Applied Mathematics 2014年第3期5卷 501-511页

作者： Goce Chadzitaskos lenka Háková Ondrej Kajínek Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in PraguePragueCzech Republic

We deal with the Fourier-like analysis of functions on discrete grids in two-dimensional simplexes using C- and E-Weyl group orbit functions. For these cases, we present the convolution theorem. We provide an example of application of image processing using the C-functions and the convolutions for spatial filtering of the treated image.

关键词： Orbit Functions Convolution Image Processing

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