[Cytogenetic monitoring of the Usmansky and Hrenovskoy autochtonic pine stands].

The data on the cytogenetic monitoring of the Usmansky and Khrenovskoy autochthonic pine stands (Voronezh Region) allow their status to be rated satisfactory. The indices of the mitotic and nucleolar activity as well as of abnormal mitosis were within the normal variation range for Scotch pine. However, the occurrence of micronuclei (less than 1%) points to pathological processes starting in the stands, which necessitates urgent measures for the conservation of the Usmansky and Khrenovskoy Forests as valuable gene sources.

[Variability of the cytological parameters of Pinus sylvestris L. seeds from the unique Hrenovskoy pine forest].

Hrenovskoy pine forest is a unique island stand at the boundary of the species range of Scots pine Pinus sylvestris L. This object is of exceptional economic value, because it serves as a forest-seed base for the Voronezh oblast and some other regions of Russia; therefore, the stand and seed qualities have to be monitored constantly. The results of the first cytogenetic study of the seed progeny of P.

[Hygienic and immuno-allergologic aspects of the effects of formaldehyde and wood dust in furniture production].

The study evaluated effects of threshold sensitizing levels of formaldehyde (and its combination with woody dust) on health of furniture production workers. The results enable to conclude that MAC of formaldehyde (or combined with woody dust) increases danger of symptomatic allergies and considerably alters immune reactivity, causing atopic immune state. Formaldehyde promotes general nonspecific diseases by inducing the hyperergic reactivity that exhausts immune defense mechanisms.

[Study of the role of parents' occupation in children's mortality].

This study have been carried out to: a) investigate the prevalence of such occupational factors in parents which could be fatal to their children, and b) evaluate quantitatively the risk of mortality in infants caused by some leading diseases developed as a result of harmful occupational factors to which their parents had been exposed. During this work the data bank on infant mortality in Tallinn based on deaths registration in city archive for period 1968-1992 has been created. This bank includes the data on parents' occupation.