[Population Dynamics of Cancer: a Model of Second Order Phase Transition].

The paper deals with an approach to the description of the age and temporal dynamics of cancer, based on the model describing the dynamics of the age of cancer as a second order phase transition. This approach is widely used for studying physical systems. This model of cancer development as second order phase transitions is in a good agreement with medical statistics. The cancer incidence dynamics is described only with two free parameters, easily verified according to statistics and well interpreted. The applicability of the second order phase transition model for description of a non-physical system defines the universal nature of the processes occurring during phase transitions.

[Gypsy moth Lymantria dispar L. in the South Urals: Patterns in population dynamics and modelling].

The analysis is conducted on population dynamics of gypsy moth from different habitats of the South Urals. The pattern of cyclic changes in population density is examined, the assessment of temporal conjugation in time series of gypsy moth population dynamics from separate habitats of the South Urals is carried out, the relationships between population density and weather conditions are studied. Based on the results obtained, a statistical model of gypsy moth population dynamics in the South Urals is designed, and estimations are given of regulatory and modifying factors effects on the population dynamics.

[The early comprehensive rehabilitation of the children with perinatal pathology of the craniovertebral region and cerebrospinal neurological symptoms].

This paper is designed to report the results of a clinical study of the children presenting with neurologic pathology for the detection of the most common concomitant craniovertebral disorders. In addition, the experience of application of the methods for comprehensive rehabilitation is presented with special reference to remedial exercises, manual therapy, massage, and other physiotherapeutic procedures. Positive experience with the application of orthopedic devices is described including the Shants collars and corsets as well as the observance of the specific orthopedic locomotor regimen. These combined measures are designed to enhance the quality of life of the patients, correct their neurologic symptoms, and improve the compromised academic performance.

[A population and energetic model of an outbreak of forest insects].

A model of the population dynamics of insects has been developed, which takes into account the food consumption by insects and the reaction of food plants to the damage. Equations have been derived that describe the relationship between the coefficient of insect reproduction, the weight of females, the energetic effectiveness of the food consumption by insects, and the reaction of food plants. The scenarios of population outbreaks have been analyzed as a function of the weight of females in the stable state. The results of modeling have been compared with the data of natural observations.

[Optimization model of spatial population structure: example of poplar moth laying eggs on leaves]. / Optimizatsionnaia model' prostranstvennoi struktury populiatsii (na primere razmeshcheniia iaits topolevoi moli na liste).

The authors analyze spatial distribution and survival of populations of poplar moth Litchcolletis populifoliella Tr. on its feeding plant--balsam poplar Populus balsamifera. Imago of the moth glue its eggs on the leaves thus determining the future location of their offspring on the host plant. Spatial distribution of eggs on leaf surface and distribution of leaves according egg numbers are not random. On the short distance from each egg the average number of eggs is less, than it should be in case of random distribution. While this distance increases up to some particular value the occurrence of eggs is higher than random. Thus, the eggs of moth are located by groups on the leaf surface. Within each group eggs are situated not very close to each other, this allowing larvae to lower competition for common resource. It is suggested that on the same feeding plant individuals have different interactions: competition, caused by limited quantity of resource and cooperation that is necessary to resist leaf defensive (antibiosis) reaction.

[Clinical and immunologic effect of likopid in complex therapy of occupational bronchial asthma]. / Kliniko-immunologicheskie éffekty likopida v kompleksnoi terapii bol'nykh professional'noi astmoi.

Use of immune modulators for occupational bronchial asthma is expedient pathogenetically. Therefore the authors evaluated efficiency of LICOPID made in Russia for treatment of occupational bronchial asthma caused by chemical hazards and complicated by infection.

[The enzyme activity and cationic proteins in the blood cells in the modelling of tourniquet shock in rats]. / Aktivnost' fermentov i kationnye belki v kletkakh krovi pri modelirovanii turniketnogo shoka u krys.

The activity of red cell enzymes and the cationic protein content in the granulocytes were studied in different periods of tourniquet shock. The activity of lactic dehydrogenase and glucose-6-phosphate dehydrogenase reduced 3-6 hours after removal of the tourniquet; the activity of glutathione reductase did not change. The value of the lysosomal-cationic test diminished 6 hours after application of the tourniquet and increased 2 hours after its removal. The results of the study allow the lysosomal-cationic test to be recommended for determining the unspecific resistance in shock.

[Effect of polyene antibiotics on the development of alcoholic-dietary fatty degeneration of the liver in rats]. / Vliianie polienovykh antibiotikov na razvitie alkogol'no-alimentarnoi zhirovoi distrofii pecheni u krys.

The effect of the sodium salts of levorin, isolevorin, nystatin and amphotericin B prepared with the use of sodium desoxycholate and amphoglucamine on the development of fatty degeneration of the liver was studied in rats. Fatty degeneration of the liver was induced in the animals by the diet deficient in choline and administration of alcohol (10 g/kg). Most of the studied antibiotics inhibited the development of the liver fatty degeneration. The only exclusion was amphotericin B prepared with the use of sodium desoxycholate which did not influence the level of the liver fatty degeneration. Sodium levorin (10 mg/kg) produced the most pronounced normalizing effect on the lipid metabolism in the liver. Complication of mycoses with fatty degeneration of the liver should not be considered as a contraindication to their treatment with polyenic antibiotics.