[Cardiological pathology in geological professionals].

The staff of the Medical Center "MEDGEO" have surveyed the working conditions and everyday life determined by the specific features of their watch-and-expeditionary work for their impact on the health status of geological workers. Since 1975, more than 13,000 specialists of the industry and members of their families have been examined in different climatic and geographical regions of the country, including 5,689 persons directly in their working places. More than 3,000 specialists have been studied in the clinical setting by using comprehensive diagnostic techniques.

Extraction of mineral elements from inedible wastes of biological components of a life-support system and their utilization for plant nutrition.

Two methods of extracting mineral elements from otherwise deadlock products of a life-support system are presented. We describe first optimum conditions for recovering elements by water extraction from dry wastes of plants, biomass ash, and solid human wastes after passing them through the catalytic furnace; and, second, we describe acid extracts of biogenous elements by 1N and 2N HNO3 from these products. Ways to use the extracts of elements in plant nutrition are considered in order to increase the extent to which the mineral loop of a life-support system can be closed.