Balkin A.S., Cherkasov S.V.
DEVELOPMENT OF COCULTIVATION MODEL OF FREE-LIVING AMOEBA ACANTHAMOEBA CASTELLANII WITH BACTERIA SALMONELLA ENTERICA SEROVAR TYPHIMURIUM 14028S ^{[№ 9 ' 2017]}
Ability of salmonella to persist and replicate within free-living amoebae allows bacteria to survive adverse environmental conditions. However, many aspects related to the survival of salmonella in the environment and the interactions with eukaryotes remain poorly understood.
In this study, the interaction of Salmonella enterica serovar Typhimurium 14028S with cells of free-living amoebas of Acanthamoeba castellanii was studied. Established, that bacteria of this strain are able to penetrate and survive inside A. castellanii phagosome. Most of salmonella is absorbed by amoebas during the first hour of cocultivation. Cytotoxic effect of salmonella is observed with respect to acanthamoeba after 8 hours of co-cultivation and reaches a maximum after 16 hours.
Developed model of interaction between Salmonella and Acanthamoeba is promising for studying the survival strategy of pathogenic microorganisms in environmental conditions. This model can be used to evaluate expression of salmonella genes during phagocytosis by protozoa.

Cherkasova Y.V., Petrishchev V.P.
LANDSCAPE FEATURES MORPHOSTRUCTURE SETTLEMENTS ORENBURG REGION ^{[№ 6 ' 2014]}
Researches conducted morphostructure settlements Orenburg region, the main types of rural settlements and given the appropriate description of the data types and subtypes identified landscape features in the rural resettlement and placement of various morphologic types of settlements.

CherkasovaE.V. LebedkovaS.E.
CONDITIONOFBONESTRENGHT AT HEALTHY ADOLESCENTS ORENBURG ACCORDING TO ULTRASONIC DENSITOMETRY ^{[№ 6 ' 2013]}
Research of bone strength at healthy adolescents of Orenburg is conducted by a method of ultrasonic densitometry. It is revealed that decrease in bone strength is noted at 21,1 %. Dependence of indicators of bone strength on physical development of adolescents is established.

Chepasov V.I., Kharchenko D.A., Cherkasova O.Yu.
DETERMINATE AND STATISTIC METHODS IN CALCULATION OF POLYVALENT DIAGRAMS ^{[№ 2 ' 2006]}
Using of correlation, factorial, regressive analyses for polynomial models determination of electrical network parameters are shown in this article. Comparison of extreme value of power in case of determinate and statistic approaches are made here.

Chepasov V.I, Harchenko D.A., Cherkasova O.J.
DETERMINED AND STATISTICAL METHODS IN CALCULATION OF POLYVALENT CIRCUITS ^{[№ 5 ' 2005]}
In the article the use of correlation, factorial, regression analyses is shown for definition of multinominal models of parameters of electric circuits. The comparison is made of extreme values of capacity in case of the determined and statistical approach.

Chepasov V.I., Kharchenko D.A., Cherkasova O.Y.
THE BASIC PARAMETERS IN FREQUENCY ANALYSIS ^{[№ 2 ' 2005]}
The authors study the methods to define the basic parameters for multicornered tests. The article contains the use of the method to restore jump signal spectrum and its parameters.