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Start Over Language russian Region united states Publisher izdatelstvo nauka
2 results

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

Author

Soukhovolsky VG, Ivanova YD, Shulman K, Mazharov VF, Tarasova IV, Tarasova OV, and Khlebopros RG

Subjects
Adult, Age Distribution, Age Factors, Child, Female, Humans, Male, Middle Aged, Middle East epidemiology, Neoplasms classification, Neoplasms pathology, Russia epidemiology, Sex Factors, United States epidemiology, Models, Statistical, Neoplasms diagnosis, Neoplasms epidemiology, Population Dynamics statistics & numerical data
Abstract

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.

Published
2015

2. [Phylogeography and phenotypic diversity of the pumpkinseed Sunfish Lepomis gibbosus (Linnaeus, 1758) of the Northern Black Sea Coast].

Author

Slynko EE, Novitsky RA, Bangs MR, Douglas MR, Douglas ME, Khrystenko DS, Kasyanov AN, and Slynko YV

Subjects
Animals, Black Sea, Fishes anatomy & histology, Haplotypes, Maryland, Perciformes anatomy & histology, Rivers, United States, DNA, Mitochondrial genetics, Fishes genetics, Perciformes genetics, Phylogeography
Abstract

This paper studies the origin and the genetic and morphological diversity of the pumpkinseed sunfish, a North American invader that is actively expanding its range in the Northern Black Sea Coast. Based on an analysis of variability of the nucleotide sequence of the mtDNA cyt b locus, it was found that all populations of the Northern Black Sea Coast (basins of Dnieper, Dniester, and Danube rivers) are represented by one haplotype. Intraspecific variability is absent. Phylogeographic analysis revealed that the most related haplotype is in a population of pumpkinseed sunfish from New Germany Lake in the Potomac Riverbasin (Maryland, United States), which makes it possible to consider it a parent of the investigated populations. Morphological variation oin countable traits was highly homogeneous. Significant differentiation of a sample from the population of the Dnieper Reservoir from the populations of the Danube and Dniester was found for plastic traits of both the body and cranium. Analysis of the trajectories of development showed that the Dnieper is inhabited by a "pelagic" morpho-ecological form of pumpkinseed sunfish, while the Dniester and Danube is inhabited by a "littoral" form. It is suggested that the success of the settlement of this North American species in the Northern Black Sea Coast does not depend on the origin or the level of its genetic diversity but is instead likely to be ensured by the realization of its available discrete morpho-ecological variability.

Published
2015