Biology

Type Specimens of Thymus L. (Lamiaceae) Kept in the Sprygin Herbarium of Penza State University (PKM)

Sprygin Herbarium of Penza State University – the largest scientific Botanical collection with the international acronym of the PKM, founded in 1894 on the initiative of the largest naturalist Ivan Sprygin. In the collections of the Penza Herbarium contains about 170 000 herbarium sheets of vascular plants, mossy plants, algae, lichens and fungi, of which over 30 authentic samples. Since 2009, the Herbarium is the electronic cataloguing of the collection. Results of revision on the type of genus Thymus L. (Lamiaceae) in the Sprygin Herbarium of Penza State University (PKM) are psesented.

Morphological Variability in Populations of Chondrilla L. (Asteraceae) in European Russia

The morphological variability in populations of Chondrilla was subject to the numerical analysis using the unweighted pair group method with arithmetic mean (UPGMA). The study showed that out of the seven species of the genus found in European Russia, it is only C. ambigua that has the status of undoubted species. A distinct difference is observed between the two groups of populations: the first group comprising C. juncea, C. latifolia, C. brevirostris, and the mixed population of C. juncea/graminea; and the second group comprising the populations of C. graminea and C. acantholepis.

Features of in vitro Cold Storage of Some of Rare and Endangered Plants of Saratov Region

The article presents the results of work on preservation of plant tissues and organs of rare and endangered species in conditions of slow growth. Special attention is paid to modeling objects, Silene cretacea and Potentilla volgarica – obligate calcifythes enlisted in the Red book of the Russian Federation. Slower growth of the explants was provided by reducing the cultivation temperature to +5±1 C and introducing into the nutrient medium of osmotic (sucrose 30, 60 or 90 g/l), retardant (chlorcholinechloride) and/or sorbent (activated carbon). It is established that the deposition of S.

The Malondialdehyde Assessment in the Blood Serum of Ultrahigh Frequency Electromagnetic Field Exposed Animals

The goal of this research was lipid peroxidation process assessment for different levels of ultrahigh frequency electromagnetic field and different time exposure. There were animal 171 MHz one time exposures during 1 and 3 hours. In the blood serum of exposed animals the malondialdehyde concentration evaluated the lipid peroxidation process. The research results shown the statistically significant electromagnetic field biological effects as for maximum field strength 1 hour exposure, as lower field strength 3 hours exposure.

Spatial Structure of Spermophilus Pygmaeus Pallas, 1778 Settlements Found in the Territory of the North-Western Caspian-Sea Region

Represented are the results of assessment regarding abundance rates and spatial structure of little souslik settlements situated in the territory of the North-Western Caspian-Sea Region. Investigated are the factors affecting the spatial structure of its settlements in the territory of the Ergeninsk Upland, Sarpinsk and Caspian Depressions.

Light-dependent Bioelectric Activity of Wheat Seedlings

Was studied the peculiarities of tissue changes of bioelectric potentials of spring wheat seedlings in the early stages of ontogeny. Appreciated the contribution of the spectral composition of light and simulated drought conditions on the formation of action potentials in the tissues. It was found that the bioelectrical reaction of wheat seedlings to light exposure differs from etiolated plants and pre-lit. It shows more value to generate an action potential areas of blue and red region of the spectrum.

Biology Features of Ants (Hymenoptera, Formicidae) in the National Park «Khvalynsky» (Saratov Region)

Ants are essential component of ecosystems. Their success is due to the social organization, the ability to alter habitat and use a variety of food resources. Food objects of ants are not large invertebrates, seeds of plants and honeydew aphids. The activity of ant in community dedicated to different time slots. We have founded the dominant group of ants in size in the studied associations (Tetramorium caespitum – in forest; Lasius alienus and species of the genus Myrmica – in steppe). Installed the fauna of 5 living in the ant nests of studied species.

Bioaccumulation of Cadmium (II) by Bacillus sp. 14 Rhizobacteria

To study the resistance of isolated rhizobacterium Bacillus sp. 14 to cadmium (II), bioaccumulation of the metal by this microorganism was investigated. It was shown that accumulation of cadmium (II) occurs during the exponential phase of the microorganism’s growth. The predominant role of the extracellular surface of the growing cells Bacillus sp. 14 in the cadmium (II) resistance was clarified.

Gene Expression of Specific Factors Transcription Exp1 during Morphogenesis Xylotrophic Basidiomycete Lentinus Edodes

It was established that gene expression exp1, encoding a specific transcription factor was activated during transition the vegetative to the generative stage of development in cultivating xylotrophic basidiomycete Lentinus edodes (shiitake) on wood substrate. Especially this is characteristic from stage previous of fruiting and connected with the formation of brown mycelial mat. A study showed that exp1 gene transcriptional activity increased 10-fold during formation of the morphological structure, while drop in activity of the gene was marked for primordial and fruiting bodies.

ANTIBIOTIC SUSCEPTIBILITY OF PATHOGENS IN URINARY TRACT INFECTIONS IN COMMUNITY

This study was done to evaluate the bacterial profile and antibiotic susceptibility pattern of urinary tract infections (UTIs) microbial causative agents. For proper identification of causative microbial agents, mid– stream urine (MSU) samples were taken from 325 patients suspected to have UTI. These specimens were cultured and subjected to appropriate biochemical tests. Our results revealed that 200 urine samples showed positive cultures. The most prevalence isolates were Escherichia coli with frequency rate of 55.5%, followed by Klebsiella spp. (14%), Enterobacter spp.

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