Structural and functional organization of a larch phytocenosis in a postfire progressive succession in the north of Central Siberia

The author considers specific features of the postfire formation of a larch (Larix gmelinii) phytocenosis in Central Evenkia, the north of Central Siberia. Morphological parameters of trees, structure, height, growth, and biological productivity of the tree stand, shrub layer, live ground cover, and accumulation of detritus after progressive pyrogene succession are analyzed and discussed.     

RNase P-Guiding Peptide Conjugates of Oligo(2'-O-methylribonucleotides) as Prospective Antibacterial Agents

Russian Journal of Bioorganic Chemistry - A novel variant of the synthesis of 3'- and 5'-peptide conjugates of oligo(2'-O-methylribonucleotides) has been developed using thiol-maleimide...     

Conjugates of RNase P-Guiding Oligonucleotides with Oligo(N-Methylpyrrole) as Prospective Antibacterial Agents

Russian Journal of Bioorganic Chemistry - The conjugates of RNase P guiding oligo(2'-O-methylribo)- and oligodeoxyribonucleotides (EGS oligonucleotides) with oligo(N-methylpyrrole) have been...     

The radiation-increased synthesis of phytochelatins in roots of gamma-irradiated barley seedlings

It was shown that gamma-irradiation and cadmium nitrate increased synthesis of phytochelatins in roots of barley seedlings. The stimulation of synthesis of phytochelatins in gamma-irradiated plants was shown for the first time. The results obtained indicate more important role of phytochelatins in intercellular metabolism than heavy-metal-binding.     

Metallothionein content in tissue and neoplasms of mice under cadmium chloride administration and gamma irradiation. Increased radioresistance in mice with elevated level of metallothionein

It was confirmed that the survival of gamma-exposed mice became higher after preliminarily subcutaneous injections of cadmium chloride. It is supposed that radioresistance of mice is connected with the induction of metallothionein proteins by cadmium chloride.     

Dynamics of wound healing of skin wounds produced by laser and scalpel in experiments

In this study in 90 rats the measured rate of healing, pO2 in sites of postoperative scar and histological specimen of identical excisional wounds produced by CO2-laser, scalpel and combination are compared. The data of healing laser wounds via scalpel ones show slow laser wound healing. We explain, this by inhibition of the inflammation phase due to diminishing macrophages migration into the wound. pO2 data in postoperative scar after laser and scalpel wounds show that laser thermal alteration does not influence CO2 regimen in the scar.     

Dynamics of structure and biological productivity of post-fire larch forests in the Northern Mongolia

Peculiarities of forming and growth of post-fire larch (Larix sibirica Ledeb.) forests at the southern range of their distribution in the Northern Mongolia were studied. Regularities of the stand structure and dynamics of biological productivity are analyzed and discussed in the paper. It has been proved that the structure of the organic mass of the post-fire herb-carex type larch tree stands at the southern border of forest vegetation distribution is closely related to their biometric indices as-age, density, and productivity. In comparison with tree stands from the other areas of forest vegetation, the total phytomass stock of larch phytocenoses appropriately increases by zonal gradient from forest-tundra border to the Transbaikalian southern taiga and northern regions of Mongolia. Regeneration of forest cover by edificator and formation of the original larch coenopopulation is a positive trend from an environmental point of view, because the Siberian larch in young and middle-age period in the area has a sufficiently high growth energy and rate of phytomass production, with more than twice exceeding mature forests in fixed carbon of the atmosphere and has positive values of carbon balance and total destruction of organic matter by the “input-output” parameters.