Morphofunctional changes in animal skin during combined administration of zinc sulfate and vitamin A

Morphological and histochemical skin properties were studied in male rats in single and successive peroral injections of Zinc sulphate and vitamin A. Long term (25 d) peroral administration of vitamin A 2 mg/100 g in dose was shown to cause hypozincaemia. Zinc sulphate and vitamin A are capable of influencing proliferation and protein metabolism of epidermal cells and number of lymphocytes and mast cells in dermis. With the aim of the drugs named thickness of epidermis, ratio of its layers thickness as well as the rate of protein synthesis in germinal layer of epidermis can be changed purposefully. These parameters depend both on the drug injection technique (single, separated or successive injections) and time periods. Perspective of obtaining a complexed biocoordinative compound on the base of vitamin A and microtrace element of Zinc is discussed.     

Structure of occupational diseases in patients examined and treated at the Institute clinic of hygiene, occupational diseases and human ecology

The authors analyze data on patients diagnosed as having occupational disease in 1970-1995 and grouped according to age, sex, length of service, occupational hazards. Incidence of various syndromes in occupational diseases is calculated. The authors detail some items obscuring diagnosis of occupational diseases and necessitate referral to various professionals for precise and early diagnosis.     

Chemical accidents and organization of medical services

The article gives an analysis of the 30 years experiences with treatment of more than 3200 patients with rectum cancer at a specialized oncological department. Postoperative lethality was 7.3%. In recent years this figure has been decreased (5.2%). The individual programs of treatment were associated with the degree of growing the tumor through the bowel wall and with the metastatic damage of the regional lymph nodes. These factors show that careful as well as extended and combined operations are justified. The advantages of combined methods of treatment and functionally saving surgical interventions have been revealed.     

Aortoiliopelvic lymphadenectomy in surgical treatment of rectal cancer]

Additional energy expenses due to stretching of the elastic elements of anti-loading suit (ALS) "Penguin" as a whole (shoulders-feet) or only its lower part (waist-feet) in the course of cyclic leg movements were measured in five female and five male volunteers. ALS design enabled tensometric monitoring of efforts applied to specific elastic elements, and total efforts applied to the shoulder or pelvic girdles separately. Energy spend were determined with the indirect calorimetric techniques from the data of the expired air analysis. Registered were electromyograms of m. longus spinae, femoral extensor (m. biceps femoris) and femoral flexor (m. rectus femoris), and m. gastrocnemius. On the first stage, bicycle ergometer was pedaled w/o loading with a frequency of 60 cycles/min. The next stage included testing by incremental loading in which pedaling ceased at the pulse rate of 150/min. Results of the experiments that did not require stretching elastic parts of the suit and in which the total strain effort made up 20 to 25 kg and 15 to 16 kg by males and females, respectively, were compared. It was ascertained that ALS enhanced metabolism during motion by 20 to 30%; however, there was no significant difference in energy expenses when loaded by the whole suit or only its lower part.