[The role of oxygen radicals in the physiology and pathology of human sperm].

Reactive oxygen species in low doses are necessary compound of sperm capacitation and hyperactivation. Superoxide anion, hydroxyl radical and hydrogen peroxide initiate sperm capacitation. The edding of antioxidant enzymes inhibits the spontaneous and induced sperm hyperactivation.

[The effect of the new metabolic preparations rikavit and mildronat on the parameters of the blood acid-base balance in humans with hypoxia].

Two antihypoxic drugs: rikavite and mildronate having different application points in the metabolic chains have been comparatively studied on three groups of patients with chronic hypoxemia developed due to chronic pulmonary heart (control group, group of patients taking rikavite, and those taking mildronate). Rikavite and mildronate are shown to improve the parameters of the acid-base state (ABS) and gases in blood of examinees. However, efficiency of the drugs' action depends on the initial degree of hypoxemia.