ABSTRACT
Conceptually new methods of hydrate formation are proposed. The first one is based on the shock wave impact on a water-bubble medium. It is shown that the hydrate formation rate in this process is typically very high. A gas hydrate of carbon dioxide was produced. The process was experimentally studied using various initial conditions, as well as different external action magnitudes. The obtained experimental data are in good agreement with the proposed model. Other methods are based on the process of boiling liquefied gas in an enclosed volume of water (explosive boiling of a hydrating agent and the organization of cyclic boiling-condensation process). The key features of the methods are the high hydrate formation rate combined with a comparatively low power consumption leading to a great expected efficiency of the technologies based on them. The set of experiments was carried out. Gas hydrates of refrigerant R134a, carbon dioxide and propane were produced. The investigation of decomposition of a generated gas hydrate sample was made. The criteria of intensification of the hydrate formation process are formulated.
ABSTRACT
AIM: To study the effectiveness of remaxol in erythrocytes oxygen transport function correction in patients with surgical endotoxicosis. MATERIAL AND METHODS: Two groups of patients (main (n = 25) and comparison (n = 27) groups) with acute appendicitis complicated by peritonitis were compared. All patients underwent standard postoperative treatment including infusion therapy 1600--2000 ml/day, antibiotics as combination of semi-synthetic penicillins and aminoglycosides, anesthetic and desensitizing therapy. In the main group daily intravenous infusion of remaxol 400 ml for 5 days was used. The first dose was administered intraoperatively or immediately after surgery. Patients underwent emergency surgery and destructive forms of acute appendicitis accompanied by diffuse purulent or purulent-fibrinous peritonitis were diagnosed. Removal of appendix, debridement and drainage of the abdominal cavity were performed. Observation of clinical and laboratory tests were carried out at admission and in 1, 3, 5 days after surgery. CONCLUSION: Acute peritonitis leads to changes of hemoglobin conformation and its oxygen-binding capacity according to spectroscopy that is an important factor in the development of general hypoxia. The greatest changes in the hemoglobin molecule were found in the 1st day after surgery as a result of surgical aggression. It is proved that modified conformational state of hemoglobin is associated with processes of lipid peroxidation and endogenous intoxication. Combined therapy with remaxol is effective to correct oxygen transport function of hemoglobin in acute peritonitis. Pronounced positive effect of the drug weakening manifestations of surgical aggression is noted after the first administration. Therapeutic efficacy of the drug is explained by its ability to reduce lipid peroxidation. Rapid recovery of homeostasis including decrease of general hypoxia using remaxol resulted in a clinical benefit.
