[Effect of the life activity factors of long-duration isolation on the chromosomal apparatus of human blood lymphocytes in vivo].

The purpose was to study consequences of long-duration (105-day) isolation and confinement on the rate of chromosomal aberrations in human blood lymphocytes in vivo. Blood samples for cytogenetic analysis were drawn from 6 test-subjects before and on completion of the experiment. Analysis of unstable chromosomal aberrations showed a statistically reliable increase (p < 0.

[Dynamics of chromosomal aberrations in primates subject to continuous and fractionated gamma-irradiation by equally effective residual doses].

The paper deals with a comparative study of two regimens of Macaca mulatta continuous 2-week gamma- and double fractionated acute irradiation by the total absorbed doses of 250 and 132 cGy, respectively; data about chromosomal aberration rates in peripheral lymphocytes were correlated. Based on calculations it was hypothesized that, regardless of regimen, by day-12 of irradiation the effective residual dose would be same, i.e.

[Effect of accelerated heavy ions of carbon 12C, neon 20Ne and iron 56Fe on the chromosomal apparatus of human blood lymphocytes in vitro].

Cytogenetic assay of the chromosomal apparatus of human blood lymphocytes was carried out after in vitro irradiation by heavy charged particles with high LET values. Blood plasm samples enriched with lymphocytes were irradiated by accelerated ions of carbon 12C (290 MeV/nucleon and LET = 70 keV/microm), neon 20Ne (400 MeV/nucleon and LET = 70 keV/microm), and iron 56Fe (500 MeV/nucleon and LET = 200 keV/microm) in the dose range from 0.25 to 1 Gy.

[Rapid dicentric assay of human blood lymphocytes after exposure to low doses of ionizing radiation].

The probability of losses of different chromosome aberrations during the dicentric chromosome assay of metaphase cells with incomplete sets of chromosome centromeres was estimated using a mathematical model for low doses of ionizing radiation. A dicentric assay of human blood lymphocytes without determination of the total amount of chromosome centromeres in cells without chromosome aberrations (rapid dicentric assay) has been proposed. The rapid dicentric analysis allows to register chromosome aberrations in full compliance with the conventional classification.

[Cytogenetic characteristics of human blood lymphocytes in vivo in a 120-day bedrest study].

Effects of 120-d bed rest on chromosomal aberration rate were studied in lymphocytes of human peripheral blood in vivo. Chromosomal analysis revealed statistically significant increases in dicentrics and paired acentric fragments in blood lymphocytes of human test-subjects.