Perfluorosulfonic membranes were modified by Schiff bases by sorption of molecules on sulfonic groups of the membranes and by coordination attachment to preliminarily implanted La
3+
cations. The ...fixation of the molecules in nanosized cavities of membranes is responsible for their luminescence at room temperature in a violet-blue spectral range. The choice of guest molecules of bases and the mode of their immobilization in a membrane provides certain possibilities of regulating the position of the de-excitation band of film luminophores.
Interhemispheric relations of the EEG power in the 1-60 frequency band were studied at the stages of formation and testing of the cognitive set to facial expression. Different topographic asymmetry ...patterns were revealed in subjects with different set plasticity. In subjects without behavioral actualization (n = 11) of the set at the stage of set formation, EEG power in the gamma band (21-40 and 41-60 Hz) prevailed in the frontal areas of the right hemisphere, whereas the power of electrical oscillations in the bands of 2-7 and 8-13 Hz was higher also in the frontal areas but of the left hemisphere. At the stage of set testing, this basic topographical asymmetry pattern persisted. Formation of the set in subjects with pronounced actualization (n = 18) was characterized by another topographical asymmetry pattern: a significant excess of the power of gamma oscillations was observed in the posterotemporal and occipital areas of the left hemisphere, whereas the power of oscillations in the bands 2-7, 8-13, and 14-20 Hz was higher also in the posterior areas but of the right hemisphere. No asymmetry in the EEG power was observed in these subjects at the stage of set testing.
The fluorescence spectrum of anthracene introduced into the pore space of a perfluorosulfone membrane reflects the localization of a guest material in carrier nanochannels with the formation of ...closely spaced molecules able to form either excimers or stable dimers depending on the irradiation conditions.
The power spectra of baseline (prestimulus) EEG recordings from various parts of the cortex in the band 1–60 Hz were studied in adult subjects during the stage of formation of a cognitive set to ...facial expressions. Individual variability in the power spectra of the baseline EEG, particularly in the gamma range (41–60 Hz) made it impossible to average spectra from different subjects. This is the first study demonstrating that the EEG at 41–60 Hz was more informative during the prestimulus period than recordings at 1–20 Hz and 21–40 Hz. High levels of gamma-frequency power were found to be dominant in the frontal areas of the right hemisphere in groups of subjects with plastic sets; the group of subjects with a rigid set showed dominance of gamma-frequency power in the posterior temporal and occipital areas of the left hemisphere.
Using differential electrophoresis protein composition of lens major proteins in hybrid mice F1 (C57B1XCBA) with cataracts of different etiology (senile, ultraviolet, radioactive and combined ...ultraviolet-radioactive exposure) was studied Changes that may be specific for cataract caused by aging, ultraviolet and/or gamma-irradiation were not revealed in water-soluble and water-insoluble protein fractions.
Comparative study of lens biomicroscopy in cataract of different etiology (senile, ultraviolet, radioactive and combined ultraviolet- radioactive exposure) is performed in experiment on animals ...(mice). Lens opacification pattern was showed to be similar in aging as an endogenous factor and ultraviolet (UV) and radioactive exposure as exogenous physical factors. Specificity of these factors is expressed in degree of damage only. Depending on damaging potential the factors may be arranged in a following way (in increasing manner): aging, ultraviolet irradiation, gamma-irradiation, gamma+UV-irradiation.
A comparative experimental study of biomicroscopic appearance of lenses in cataracts of different genesis (age-related, ultraviolet and other radiation-induced or combined) has been performed on ...animals (mice). It is shown that identical lens opacification can be provoked by aging (endogenous factor), as well as ultraviolet and other radiation exposure (exogenous physical factors). The only differential sign is the severity of the damage. These factors can be arranged in the following ascending order by their damaging ability: aging --> ultraviolet --> gamma rays --> gamma rays + ultraviolet. Anti-cataract effect of a chaperone-like combined drug (N-acetylcarnosin and D-pantetin) has been studied in vivo on a "prolonged" model of induced cataract in rats. The use of the combined drug (1:1 mixture of the two peptides) in the form of ocular instillations and intraperitoneal injections helped slowing the progression of the ultraviolet-induced cataract in vivo.
New substrates of horseradish peroxidase and laccase incorporating advantages of ferrocenes, on one hand, and typical aromatic substrates of peroxidase, on the other, viz. p-ferrocenylaniline ...(FcC6H4NH2-p) and p-ferrocenylphenol (FcC6H4OH-p), have been introduced. The new substrates are superior in terms of (i) high reactivity, i.e., the second-order rate constants for their oxidation by the peroxidase compound II equal ca. 1 × 107 M-1 s-1 at 25 °C, pH 5.0, which are 102 times higher than the corresponding rate constants for oxidation of ferrocene, alkylferrocenes, and aniline; (ii) easy spectral control of redox transformations at 439 or 860−1000 nm (products are colored and the extinction coefficients are high); (iii) the products are water-soluble and do not inactivate enzymes. p-Ferrocenylaniline is readily electropolymerized on a rod carbon electrode in 0.1 M HCl by potential cycling in the range from −0.4 to +1.1 V (versus Ag/AgCl). The peak potentials are weakly pH-dependent in the range 0.5−7 and the slopes of potential versus pH plots are less than 30 mV. p-Ferrocenylaniline is also electrochemically active when adsorbed on a carbon electrode from an acetone solution. It has been demonstrated that the electrodeposited and adsorbed p-ferrocenylaniline films mediate the electro-oxidation of NADH with the sensitivity of 1.4 and 0.25 μA/mM cm2 at pH 5 and 7.2, respectively.
Analysis of samples of exhaled breath condensate (EBC) is a promising noninvasive method for the control of the status of the human respiratory system. In the present work, the proteome of the EBC ...samples received from a patient with lung dystrophy at different times before and after bilateral lung transplantation is analyzed by ion cyclotron resonance mass spectrometry. Qualitative protein composition of EBC samples obtained during the first month correlates with the clinical data on the acceptance of the transplanted lungs (allograft). Fifteen months after the lung surgery, the protein spectrum was similar to the normal composition of EBC proteins. This result agrees with the medical conclusion about normal lung functioning. The results suggest that the mass spectrometric monitoring of the protein spectra of EBC may be a tool for noninvasive pulmonological diagnostics.
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