Types of aerenchyma formation in adventive roots of wild plant S. latifolium L. are described for the first time.
View Article and Find Full Text PDFThe results of study of embryo development in B. rapa plants, as well as the rate and the character of nutrient substances accumulation in their cells under slow horizontal clinorotation and laboratory control are presented. Significant similarity of the peculiarities of embryo differentiation and character of nutrient substance accumulation in both variants was shown.
View Article and Find Full Text PDFResults of study of callose content and its topography in mother cells of microspores, microspores and pollen grains in terrestrial and air-aquatic S. latifolium plants growing under different water regimes are presented. The increased content of callose in the microspore walls at tetrad stage and pollen grains is revealed on the basis of fluorescence intensity and quantitative luminescent analysis of terrestrial S.
View Article and Find Full Text PDFAccumulation of lipid inclusions in Brassica rapa embryos generated under slow horizontal clinorotation and in the laboratory control were analyzed by histochemical methods. The research of lipid accumulation was carried out on consecutive stages of the embryo development, from the moment of two-cellular proembryo formation up to the stages of their full differentiation (21-22-day-old embryos). Accumulation of lipid drops was revealed for the first time at early stages of embryogenesis in this species, beginning from 3-day-old embryos (ball-like stage of embryo development) under clinorotation and in the laboratory control.
View Article and Find Full Text PDFIzv Akad Nauk Ser Biol
July 2005
A complex relationship between plasma glutathione level in human population (children living in radionuclide-contaminated regions and the Chernobyl liquidators) exposed to chronic low-level radiation after the Chernobyl accident was demonstrated. The obtained experimental data indicate different responses of the human glutathione system to low (from 0.1 to 20 cSv) and high (from 20 to 150 cSv) doses of ionizing radiation.
View Article and Find Full Text PDFAge-related changes in the content of reduced and oxidized glutathione in peripheral plasma were monitored in human populations (children from birth to 12 years and adults from 20 to 70 years old) living in uncontaminated and radionuclide-contaminated regions after the Chernobyl accident. The content of glutathione in human plasma did not depend on their age and was not genetically fixed. The proportions of humans with different baselines were redistributed in the population exposed to radiation.
View Article and Find Full Text PDFA level of glutathione in the blood plasma of human population exposed to low-dose radiation after the Chernobyl accident was studied; a complicated character of dose dependence was shown. The response of the glutathione system to low and high radiation doses is different in the children living in the radionuclide-contaminated areas and in the participants of the elimination works.
View Article and Find Full Text PDFBiochemistry (Mosc)
October 1998
Essential lipid bioantioxidants (BAO) (vitamins E and A) and catabolic products of the lipoperoxide cascade (LPC) (diene conjugates, ketodienes, and carbonyls) were determined in blood plasma of children aged 11 days to three years (n = 123) who are residents of regions contaminated with radionuclides (5-40 Ci/km2 of 137Cs) discharged during the Chernobyl power plant accident. Individual antenatal radiation loads Da of children and total radiation doses of their mothers Dm were also determined as external gamma-radiation loads, which correlate with internal radiation doses for permanent residents of contaminated regions. Before examination, therapy with multivitamins containing BAO determined in this work was administered to groups of pregnant women and their children (group I, n = 48) age-matched to a group that received no therapy (group II, n = 99).
View Article and Find Full Text PDFCatabolic products of the lipoperoxidative cascade (LPC), including diene conjugates, ketodienes, and carbonyl compounds, as well as essential lipid bioantioxidants (BAO)--vitamins E and A--were determined in blood plasma of 428 children aged 0-7 years residents of areas contaminated with radionuclides after the Chernobyl Power Plant accident. Individual external gamma-irradiation doses (D) were determined. Gamma-irradiation accounted for more than 90% of total radiation loads and correlated with irradiation from absorbed sources in residents of the areas examined.
View Article and Find Full Text PDFGrud Serdechnososudistaia Khir
April 1991
The article discusses the results of treatment of acute ischemia of the pleura in 60 children with the use of intracavitary laser therapy. The empyema cavity was irradiated through a quartz flexible monocrystal light guide. The authors studied the effect of helium-neon laser beam on the empyema microflora, the condition of immunity, and the specific features of the clinical course of acute empyema of the pleura.
View Article and Find Full Text PDFAlimentary iron deficiency causes significant changes in thiol content: the increase in the content of protein sulfhydryl groups in organs at late stages and the decrease in that of non-protein sulfhydryl groups at early stages of experiment. A preliminary introduction of 10 mg/kg fine iron powder (FIP) into animals fed iron-free food leads to the decrease in sulfhydryl group content in organs and blood of experimental mice. The decrease in sulfhydryl group content at FIP introduction might be connected with changes in activity of glutathione-dependent enzymes.
View Article and Find Full Text PDFThe registration of ESR signals of organs and tissues in the wide range of temperatures permits to study properties and distribution of ferromagnetic particles in animal organisms. High dispersed powder (HDP) of iron (particle dimension--50-100 nm) was administered subcutaneously to mice in the doses 2 and 100 mg/kg weight of animals. One week after the administration HDP was accumulated in the animal organs under study.
View Article and Find Full Text PDFIzv Akad Nauk SSSR Biol
September 1985
In experiments on SHK mice it was shown that a single administration of highly-dispersed iron powder (0.2 to 100 mg/kg body weight) 20-30 min before irradiation with different doses exerted both a radioprotective and an enhancing effect and depended on both a radiation dose and a concentration of the iron powder administered.
View Article and Find Full Text PDFArkh Anat Gistol Embriol
July 1981
Changes in diameters of blood capillaries of the white rat spinal cord, peculiar changes in volume and metabolic surface of capillaries in the cervical part of the spinal cord were studied under the effect of noise (90-100 db, 2 h daily, for 2, 4 and 8 weeks). Restorative period was started in 4 and 16 weeks after the experiment was stopped. A considerable narrowing of the capillary lumen was found in the test animals comparing to the normal state.
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