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Приказ резултата 21-30 од 44
Acid activation of bentonite clay in conditions of water deficiency
(Silicates Industriels, 2005)
The methods of X-ray diffraction, FTIR, electron microscopy, BET, CEC and others were used for investigation of bentonite activation with hydrochloric acid in conditions of water deficiency. It was established that during ...
A phenomenological analysis of sintering kinetics from the viewpoint of activated volume
(Međunarodni Institut za nauku o sinterovanju, Beograd, 2005)
The sintering kinetics of real systems has been viewed as a process of transport of activated volume. Activated volume is a parameter that can be used to describe mass transport during the sintering process. It defines the ...
The effect of anoxia on PolyP content of Phycomyces blakesleeanus mycelium studied by P-31 NMR spectroscopy
(New York Acad Sciences, New York, 2005)
The effect of anoxia and the respiratory chain inhibitors azide and cyanide on the polyphosphate content of Phycomyces was studied by in vivo (31)p NMR spectroscopy. Anoxia was manifested by a decrease of core polyphosphates ...
An EPR spin-probe and spin-trap study of the free radicals produced by plant plasma membranes
(Srpsko hemijsko društvo, Beograd, 2005)
Plant plasma membranes are known to produce superoxide radicals, while the production of hydroxyl radical is thought to occur only in the cell wall. In this work it was demonstrated using combined spin-trap and spin-probe ...
Fractal analysis of rat brain activity after injury
(Springer Heidelberg, Heidelberg, 2005)
With application of the Higuchi algorithm, fractal dimension (FD) values of the electrocortical activity of the rat parietal cerebral and paravermal cerebellar cortex were calculated, before and after unilateral discrete ...
Detection of hydrogen atom adduct of spin-trap DEPMPO. The relevance for studies of biological systems
(Amer Chemical Soc, Washington, 2005)
We proposed EPR spectroscopy using spin-trap DEPMPO as a novel method for the detection of a hydrogen atom (H-center dot) produced by chemical and biological systems. In complex EPR spectra of DEPMPO adducts in biological ...
Ascorbic acid and the oxidative processes in pea root cell wall isolates - Characterization by fluorescence and EPR spectroscopy
(New York Acad Sciences, New York, 2005)
A comparative fluorescence and oxygen radical-sensitive spin trap EPR spectroscopic study of isolated cell walls (with proteins or deproteinated), in the presence and absence of ascorbate and H2O2 is presented. Fluorescence ...
Influence of photic environment on the form of the fish electroretinographic off-response
(New York Acad Sciences, New York, 2005)
Scotopic electroretinogram of dogfish shark (Scylliorhinus canicula) and eel (Anguilla anguilla) is characterized by a negative off-response, changing in sign under photopic condition. It increased under the effect of ...
Mycorrhiza formation enhances adaptive response of hybrid poplar to drought
(New York Acad Sciences, New York, 2005)
Mycorrhized and nonmycorrhized plants of hybrid poplar (Populus tremula L. x Populus tremuloides Mich) were cultivated in petri dishes until the amount of water became limiting (detected by a decrease of photosynthetic ...
Organic manure stimulates biological activity and barley growth in soil subject to secondary salinization
(Pergamon-Elsevier Science Ltd, Oxford, 2005)
A pot experiment was performed to compare the impact of organic manure on soil enzymatic activity, respiration rate and the growth of two barley cultivars (Hordeum vulgare L.) differing in their salt tolerance under a ...