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68502. The reproductive behaviour of an aphidophagous ladybeetle, Coccinella septempunctata (Coleoptera: Coccinellidae)
- Creator:
- OMKAR and Srivastava, Shefali
- Type:
- article, model:article, and TEXT
- Subject:
- Coccinellids, Coccinella septempunctata, reproductive behaviour, courtship and mating, mating duration, and mate recognition
- Language:
- English
- Description:
- The reproductive behaviour of a ladybeetle, Coccinella septempunctata was studied in detail. Males became sexually mature within 8.8 ± 0.3 days at 27°C, while females took 11.2 ± 0.4 days. Males exhibited courtship display in five steps: approach, watch, examine, mount and copulatory attempt. A prominent rejection display was shown by certain females who had not matured sexually, had recently mated or were about to oviposit. Males appeared to recognize females through chemical and some visual cues, such as size and body shape, with the chemical cues possibly playing a more significant role. Multiple matings took place within the same day. There was a gradual decrease with time in reproductive parametres, such as the duration of copulation, the number of copulatory bouts and the latent period from first to subsequent matings on the same day. The interval between mating bouts slightly increased from first to subsequent matings. The sexual status of males and females affected the duration of copulation, which was greatest in the case of unmated males and virgin females. Multiple matings increased the oviposition period, fecundity and percent hatching of eggs.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68503. The research committee of legislative specialists and East-West Research on post-communist parliaments: A decade-long relationship
- Creator:
- Olson, David M.
- Format:
- Type:
- model:internalpart and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68504. The research of interrelation between seismic activity and modern vertical movements of the european permanent GNNS-stations
- Creator:
- Tretyak, Kornyliy and Romaniuk, Volodymyr
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- geodynamika, geomechanika, geofyzika, geologie, geodynamics, geomechanics, geophysics, geology, vertical movements, velocity, seismic activity, GNSS-stations, 7, and 551
- Language:
- English
- Description:
- Based on experimental studies using the “integral velocity index of the vertical displacement of the territory” and criterion of generalized seismicity, a close functional relationship was found between two parameters of different physical nature: seismic activity and altitude displacements of the Earth’s surface in Europe. The mathematical correlation between the generalized parameters of the velocity altitude displacements on the territory and seismic activity is established according to seismic and GNSS stations for the period from 2000-2011 for the areas in Europe with close correlation between seismicity and velocity of vertical movements of the Earth’s surface. and Tretyak Kornyliy, Romaniuk Volodymyr.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68505. The research work at the Central Institute for Physics of the Earth Potsdam, GDR, in the field of Doppler satellite geodesy
- Creator:
- Dietrich, R.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- scientific research, stationary observations, and Doppler satellite geodesy
- Language:
- Czech
- Description:
- Since 1581 a JMR-4A Doppler eceiver is used mostly for stationary observations at the Potsdam observatory. The research activities have three main directions: 1. Methodical investigations of satellite interferometry using Doppler receivers and receiver calibration, 2. Computation of regional networks using the orbital program POTSDAM-5, 3. Computation of long global arcs for determination of polar motion and station coordinates.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68506. The residual effects of bensulfuron-methyl on growth and photosynthesis of soybean and peanut
- Creator:
- Su, W. C., Sun, L. L., Ge, Y. H., Wu, R. H., Xu, H. L., and Lu, C. T.
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- fytotoxicita, phytotoxicity, podzemnice olejná, chlorofylová fluorescence, výměna plynu, relativní obsah chlorofylu, Arachis hypogaea, chlorophyll fluorescence, gas exchange, Glycine max (Linn.) Merr., relative chlorophyll content, 2, and 581
- Language:
- Multiple languages
- Description:
- The effects of various concentrations of bensulfuron-methyl residues (BSM, 0-500 μg kg-1) on the growth and photosynthesis of soybean and peanut were studied. Shoot length, root length, root-to-shoot ratio, and biomass of soybean and peanut seedlings declined with the increase of BSM residue concentrations. As the concentration of BSM increased, SPAD value, net photosynthetic rate, stomatal limitation, stomatal conductance, and transpiration rate also declined with varying extent, but dark respiration rate and intercellular CO2 concentration increased gradually. PSII maximum quantum yield, actual quantum yield, and electron transport rate were significantly reduced by the BSM residues in soil, and the reduction was mostly attributed to the decrease in photochemical quenching coefficient. The results showed that photosynthesis in both crops was limited by nonstomatal factors. The residues of BSM caused reversible damage in PSII reaction centers and decrease the proportion of available excitation energy used for photochemistry., W. C. Su, L. L. Sun, Y. H. Ge, R. H. Wu, H. L. Xu, C. T. Lu., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68507. The resources and methods of hydrogen production
- Creator:
- Olga Bičáková and Straka, Pavel
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, vodík, pyrolýza, kopyrol, hydrogen, pyrolysis, conventional methods, co-pyrolysis, thermochemical cycles, electrolysis, 7, and 551
- Language:
- English
- Description:
- In the near future, hydrogen will become an important fuel which may be able to resolve local problems connected with air quality. Hydrogen-propelled transport means are being developed and are already used in the automobile industry. Since the combustion of hydrogen does not produce any emissions of carbon oxides but only water, hydrogen is considered as a key fuel of the future. Hydrogen is abundantly present all over space and can be obtained from a number of resources, be they renewable or non-renewable. Global production has so far been dominated by hydrogen production from fossil fuels, with the most significant contemporary technologies being the reforming of hydrocarbons, pyrolysis and co-pyrolysis. Plasma cracking is still in the developmental stage. The preferred method of hydrogen production on an industrial scale is steam reforming of natural gas for its low operational and production costs. When the operational costs of steam reforming and partial oxidation are compared, partial oxidation seems to be a more acceptable process, but the subsequent shift makes this process more expensive. Pyrolysis processes have acceptable investment costs and besides the production of hydrogen also satisfactory yields of oils. Two-stage co-pyrolysis is suitable considering its acquisition of a high amount of hydrogen from mixed charges. It is apparent that the co-pyrolysis of organic materials with coals is a process for hydrogen production capable of competing. It can therefore play a significant role in the future., Olga Bičáková and Pavel Straka., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68508. The response of hepatic transcriptome to dietary cholesterol in Prague Hereditary Hypercholesterolemic (PHHC) rat
- Creator:
- Vlachová, M., Marie Heczková, Milan Jirsa, Rudolf Poledne, and Kovář, J.
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, cholesterol, dietní jídla, genetika, genová exprese, hypercholesterolémie, diet, genetics, gene expression, hypercholesterolemia, rat, 14, and 612
- Language:
- English
- Description:
- To understand the pathogenesis of hypercholesterolemia in Prague hereditary hypercholesterolemic (PHHC) rat, we analyzed the response of hepatic transcriptome to dietary cholesterol in PHHC and control Wistar rats. Male PHHC and Wistar rats were fed chow (C), 5 % fat (palm kernel oil) (CF) or 1 % cholesterol + 5 % fat (CHOL) diet for three weeks. Hepatic transcriptome was analyzed using Affymetrix GeneChip arrays. No differences were found in the effect of both control diets (C and CF) on lipid metabolism and gene expression of 6500 genes. Therefore, these data were pooled for further analysis. Dietary cholesterol induced accumulation of cholesterol and triacylglycerols in the liver in both strains and hypercholesterolemia in PHHC rats. However, there were no differences in response of hepatic transcriptome to CHOL diet. On the other hand, several genes were found to be differently expressed between both strains independently of the diet. Two of those genes, Apof and Aldh1a7, were studied in more detail, and their role in pathogenesis of hypercholesterolemia in PHHC rats could not been corroborated. In conclusion, the hypercholesterolemia in PHHC rats is due to physiological response of hepatic transcriptome to dietary cholesterol in different genetic background., M. Vlachová, M. Heczková, M. Jirsa, R. Poledne, J. Kovář., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68509. The Response of Na+/K+-ATPase of Human Erythrocytes to Green Laser Light Treatment
- Creator:
- Kaššák, P., Šikurová, L., Kvasnička, P., and Bryszewska, M.
- Type:
- article, model:article, and TEXT
- Subject:
- Na+/K+-ATPase activity, Biostimulation, Erythrocyte membrane, Merocyanine 540, and Photodynamic processes
- Language:
- English
- Description:
- The objective of this study was to investigate the response of Na+/K+-ATPase of human erythrocytes to green laser irradiation. Effects of green laser light of fluences 9.5-63.3 J.cm-2 and merocyanine 540-mediated laser light treatment were studied. Isolated erythrocyte membranes (protein concentration of 1 mg/ml) were irradiated by Nd:YAG laser (532 nm, 30 mW) and then incubated in a medium with 2 mM ATP for 30 min. Activity of ATPase was determined colorimetrically by measuring the colored reaction product of liberated inorganic phosphate and malachite green at 640 nm. Contribution of Na+/K+-ATPase to overall phosphate production was determined using ouabain. A positive effect of green laser light on Na+/K+-ATPase activity was observed. The dependence of enzymatically liberated inorganic phosphate on light fluence showed a linear correlation (R2=0.96, P=0.0005) for all fluences applied (9.5-63.3 J.cm-2). On the other hand, MC 540-mediated phototreatment caused a suppression of enzyme activity.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68510. The response of spinach piants to excess of copper and cadmium
- Creator:
- Tukendorf, A.
- Format:
- Type:
- model:internalpart and TEXT
- Language:
- Multiple languages
- Description:
- Effects of excess Cd and Cu on the contents of total glutathione and phytochelatin (PC) were measured in roots and leaves of intact spinách piants. The total glutathione levels declined with the PCs synthesis. The kinetic data indicated that the shorter PCs were substrates for the longer PCs. PCs appear much earlier in roots than in leaves of intact spinách piants. The PC formation was stimulated most effectively by Cd, less so by Cu.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public