Vol. 35 No. 3 (196) (2001)

It has been estimated that 8-molybdogermanic acid during interaction with Fuchsin basic dye forms the complex associate with four associated cations of dye in the acidity pH 0.9÷1.2; pH 1.7÷2.2; pH 4.0÷5.0. This reaction is distinguished by its high contrasting and sensitivity (ε = 2.5 ·10⁵·L·mol^-1· cm^-1).

Electrode behaviour of tellurium (IV) in the presence of different backgrounds has been studied. It has been shown that it is more preferable to carry the amperometric titration at +1 V by means of reagent oxidation current. It has been shown also that chemical interaction corresponds to the 1:4 molar ratio of the reacting components and takes place with reduction of tellurium (IV) to tellurium (II). Optimal conditions for determination: acidity, concentration ranges for tellurium, influence of accompanying ions have been revealed. Mathematic statistic treatment of obtained experimental data has been carried out.

It has been studied the radical so-polymerization of acryl acid with sodium salt of 1,3-dyallilisocianurate in the presence of persulfat of ammonium or potassium. By the method of UK-spectroscopy the composition of received so-polymers are determined. The constants of so-polymerization r₁, and r₂ for above –  mentioned mechanisms are counted.

Using ion-exchange chromatography and spectrophotometer method the reaction of Mo (VI) and oxalate acid in water was investigated. It was stated that proportion 1:1 of initial materials provided creation of [MoO₂(C₂O₄)] complex. The constant of stability complexion was defined.

It has been shown that during the amine reaction of dioxanones the insignificant surplus of amine catalyzes the reaction. For the purpose of working out the optimal parameters of the reaction the formal kinetics of the process has been studied. It has been shown that the reaction proceeds with some self-braking.

Lactate dehydrogenase (LDH) total activity and isoenzymes pattern were determined in organs of germs and cell cultures of wheat, amaranth, as well as in their somatic hybrid. The LDH isoenzymes relative activities were calculated. It was shown that the application of common methods of assay of the individual isoenzymes activities and quantitative ratio does not permit to reveal the true value of these parameters. It was shown that the quantitative ratios of separate subunits (H/M) reflect the morphogenetic potentials of the individual and hybrid callus cultures. The possibility of the application of isoenzymes quantitative and qualitative pattern as express test for cell cultures morphogenetic potentials and regeneration abilities determination was discussed.

DNA’s helix-coil transition with ethidium bromide (EtBr) has been investigated within the limits of ionic strength 2.2 ·10^-3 M ≤ μ_Na+ ≤ 2.2·10^-2 M. It was revealed that at some DNA-ligand ratios the transition width of complexes ΔT becomes equal to the width of “free” DNA Δ₀T. It was shown that equalization takes place depending on the ionic strength of solution.

The present work has an aim to quicken the adaptation process through the volitional optimization of reduction the minutary volume of breathing and the using exponent of oxygen raises. During the optimal volitional reduction of minutary volume breathing (OVR of MVB) prolonged the breathing phases to 3-5-7 seconds. The prolonged trainings of OVR of MVB brings to breathing frequency automation and respiration center works in a new rythm. As a result the frequency of breathing movement in a minute and free no volutional breathing to 15, 16 in a minute. During that reducted the minutary volume of breathing and corresponding the volume of dead space (which is not involved in exchange of gases) thanks to it the volume of air presented in exchange of gases visible increases. The one-month OVR of MVB trainings with mental and physical activity brings to physiological and biochemical changes in external and tissue breathing. That brings to increase of the oxygen using (which is involved in minutary volume of breathing) and the level of aerob breathing.

The influence of salt press upon sterile topinambur plants (Helianthus tuberosus L.) and its callus tissues was studied. In order to get salt-resistant cell lines and sterile plants, the concentration of NaCl in the nutrient medium was gradually augmented during the passages, which led to the the accumulation of one of the osmoprotectants – the free proline – under the influence of such treating. The proline synthesis was stimulated by low concentrations of NaCl (0.5% and 1%). The increase of NaCl concentration till 2% suppressed the growth of both the callus tissue and sterile plants. The addition of exogenous proline to the salt-containing medium has confirmed indirectly its role as a deference factor. The suppressing influence of the salt was decreased in the medium, containing both NaCl and proline. There was morphogenesis of the calli upon the regeneration media, though not of mass character. The regenerants received were grown and preserved by means of micrografting. Comparison with the literature data allows to conclude that there is a resemblance of cell mechanisms of salt-tolerance acquisition between cultivated in vitro cells and intact plants. The obtained salt-resistant callus lines and regenerant- plants of topinambur could serve as the base for subsequent selection of topinambur sorts, which will grow on the salines.

The list of macroscopic fungi of Virahaioc mountains region of North Armenia is given. 168 species of macrofungi were revealed, 163 of which belong to division Basidiomycota, which includes class Basidiomycetes and subclass Holobasidiomycetidae, 14 orders, 30 families, 83 genus. 5 species belong to division Ascomycota, which is presented by 2 orders, 4 families and 5 genus. Among the revealed species 101 edible and 21 poisonous mushrooms were described.

The amount of free amino acids has been studied, including the proline in some herbs. The biggest amount of proline was discovered in the bitter wormwood. The amount of free proline is subject to considerable changes during the period of vegetation. The amount of proline gradually increases within 10 days, after which it practically vanishes, and at the end of the investigated period when the phase of flowering begins, it reaches its maximum (239 mcM).

Investigations for many years on some different sorts of grape grown in the region of Armenian nuclear power plant and outside it suggest that the most of homogenous fertile pollen develop with active competition ability. Genotypes with such qualities of microgametophyte can be used for biomonitoring and works in genetic selection field.