[Dynamics of prostaglandin contents and several indicators of lipid metabolism in man exposed to prolonged hypokinesis].

Nine healthy test subjects divided into Group A and Group B were bed rested (with the head down at -5 degrees) for 370 days. Group A subjects exercised from the beginning of the study while Group B subjects began exercising only 120 days after. During the study prostaglandins PGE and PGF2 alpha in serum and fatty acids in serum and erythrocyte membranes were measured.

[Effect of prolonged storage on various indices of the fatty components of freeze-dried products].

The effect of prolonged storage at the temperature 20 +/- 5 degrees C and relative humidity 70-80% on the freeze-dried food products packed in a three-layer polymer was investigated. The organoleptic parameters, fat content and fat physicochemical properties were determined in the freshly prepared foods and foods stored for 6, 10 and 14 months. The fat component of cereals and vegetables was found to change during storage: the acid and peroxide numbers increased, products of secondary oxidation accumulated, and non-saturated fatty acids decreased.

[Effect of long-term hypokinesia on the serum lipid spectrum].

The effect of 120-day head-down tilt on the lipid spectrum of blood serum was investigated. By thin-layer and gas liquid chromatography lipids (total lipids, phospholipids, cholesterol and its esters, nonesterified fatty acids, triglycerides) and higher fatty acids were identified. It was found that cholesterolemia increased at the expense of the ester bound fraction, phospholipids decreased drastically, the ratio of phospholipids to total cholesterol decreased, and triglyceridemia diminished.