PubMed Health⌕ Search

Biomedical subjects

L N Drozdovskaia

Publications and source records attributed to L N Drozdovskaia.

9 recordsLinked to original sources
PubMed1977

[Triphenylstilbene as a polymodifying agent].

The metalorganic product, triphenylstibine, added to the nutrition medium for Drosophila melanogaster larvae induces multiple modification effects, such as rough eye, wing incision, small bristles and others. Cytological analysis has shown that triphenylstibine induces new puffs and also causes the activation and depression of control puffs in giant chromosomes. A new effect of triphenylstibine is observed: it inhibits the evolution of puffs in giant chromosomes during metamorphosis. The average frequency of "inhibited" puffs is about 15%.

Animals↗
PubMed1975

[The effect of prolonged exposure to heat on the activity of salivary gland polytene chromosomes].

The influence of long-term heating on the puffing activity of polytene chromosomes in the early prepupa salivary glands was investigated. The activity of puffs was estimated by two criteria: size and frequency. The rearing of insects at a temperature of 29 degrees resulted in puff changes: the activity of some puffs increased or depressed, some puffs were inhibited, other puffs were induced newly. The differential response of each chromosome was observed. A possible mechanism of the effect of heating on the puff activity of polytene chromosomes is discussed.

Animals↗
PubMedDate not supplied

[The bilateral asymmetry of the number of bristles in Drosophila occurring under the influence of methotrexate].

The data are analyzed on the bilateral asymmetry of the number of dorsal and scutellar chaeta observed under the action of methotrexate in Drosophila of wild strain. It was shown that the incidence of asymmetric specimens induced by methotrexate was abruptly increased as compared to the control. The asymmetry was found to have a statistically significant trend to left side both of the control and the variants of treatment. There was no sex difference revealed between targets of the asymmetry.

Animals↗