Биология

This study evaluated the effi cacy of transcutaneous photodynamic therapy using blue (428 nm) LED irradiation on Staphylococcus aureus 11 in combination with a water-soluble cationic pyridyl porphyrin and optical clearing agents (OCA) in an ex vivo model. Results showed that OCA signifi cantly enhanced photodynamic inactivation with a 61% reduction in bacterial cell counts after 15 minutes of light exposure, comparable to direct irradiation.

The article presents the results of a comparative analysis of the distribution of cryptogam vascular and gymnosperms plants in the Lower Volga region based on materials from the herbarium of the Saratov State University (SARAT). Plants of the devisions Lycopodiophyta, Equisetophyta, Polypodiophyta and Pinophyta are among the ancient representatives of the fl ora of the globe. The rarity and increased vulnerability of species of these devisions is caused by both natural and anthropogenic reasons.

The effect of a diet containing natural zeolite (clinoptilolite) on the deformability of red blood cells of volunteers of both sexes, of a wide age range living in KhMAO-Yugra (Khanty-Mansiysk), was studied. Natural zeolites, according to literature data, have antioxidant, membrane-protective and hematostimulating properties. It has been shown that the use of zeolite powder by volunteers for 30 days causes an increase in the erythrocyte deformability index (determined by laser diff ractometry) compared to measurements taken before the start of the study.

The changes in lipid composition and phospholipase activity in damaged somatic nerves were studied against the background of the action of potassium hyaluronate and insulin-like growth factor-1.

Traumatic spinal cord injury is one of the most complex problems in modern medicine, characterized by a signifi cant number of severe consequences and complications, development of traumatic spinal cord disease with a complex of structural and functional disorders leading to limited self-care and mobility, persistent endocrine shifts and changes in internal organs and systems, loss of control of pelvic functions, high mortality rates, and an extremely high level of social and psychological maladaptation of patients.

The study of zoogeographic characteristics in combination with the use of modern methods for assessing phylogenetic relationships allowed us to examine in detail the phylogeographic structure in scorpions of the genus Mesobuthus. In this work, to assess phylogenetic relationships, we used the decoded sequences of the COI gene fragment obtained by the team of authors in collaborative work and deposited in the Genbank database (NCBI).

For 11 years, the staff of the Scientifi c Research Center “Botanical Garden” of SSU named after N.G. Chernyshevsky have been reintroducing a rare protected plant, Calophaca wolgarica (L. fi l.) DC., into potentially suitable places in the Saratov Region. This species is considered extinct in the region. Restoration of the species in the Saratov Region will expand its range, increase the biodiversity of the local fl ora and enrich biogeocenoses. Seed material for the reintroduction of C. wolgarica was collected from natural cenopopulations in the Volgograd Region.