Mathematical simulation of the process of combustion of slightly gaseous porous compositions

A one-dimensional model of combustion of slightly gaseous porous compositions is considered. Using this model an analysis of the dependence of the combustion characteristics on the basic parameters such as the mass ratio of the gas-free and volatile components in the starting composition, initial porosity, position of the gas liberation source relative to the reaction front of the gas-free component, and degree of sample hermetic sealing is performed for different exothermicity and endothermicity levels of the chemical processes taking place.Deceased.Institute of Structural Macrokinetics of the Russian Academy of Sciences, Chernogolovka. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 65, No. 4, pp. 461–465, October, 1993.     

Use of a resource-saving technology in water treatment systems

We present the results obtained from laboratory research works on studying the treatment of natural water by subjecting it to diaphragm electrolysis with addition of carbon dioxide into source water to achieve a higher degree of its softening and reduce the time for which water must dwell in the electrolyzer. The basic technological scheme of an industrial water treatment plant is proposed, and the economic effect from using it is calculated.     

Change of circadian pattern of arterial pressure in patients with congestive heart failure treated with perindopril, an inhibitor of angiotensin-converting enzyme (ACE)

The 24-h profile of blood pressure (BP) was studied in 28 patients (21 males and 7 females) with congenital heart failure (CHF) of NYHA class II-III (ejection fraction < 45%). The patients were 46 to 76 years of age and had postinfarction cardiosclerosis. They had not received ACE inhibitors before. Two groups were formed basing on the presence of hypertension. Perindopril was administered in a single daily dose of 2 mg or higher if demanded to reduce symptoms of CHF and/or to normalize BP. The treatment continued for 3 months. The 24-h BP profile was assessed using portable device SpaceLabs 90207 (USA). In CHF patients with hypertension perindopril significantly lowered mean 24-h, day and night BP and its loads, reestablished two-phase circadian rhythm of AP and corrected BP variability. In CHF patients free of hypertension significant changes of the profile were not registered. It is evident that unwanted changes in the BP 24-h profile due to perindopril were absent in CHF normotensives.     

Cytological parameters of buccal epithelium for the diagnosis of functional state of man

The past twenty years have seen dramatic growth and consolidation in DHMO and PPO segments of the dental benefits industry. Purchasers and patients are becoming more vocal in their demands, primarily for controlling costs. It is predicted that emerging trends will include greater emphasis on quality (and its relationship to cost) and on dental practice management companies. It is less clear what role organized dentistry will play in these changes.     

Bile duct decompression and immune correction in the surgical treatment of mechanical jaundice of non-tumor origin

The aims of the study were: 1) to determine optimal duration of bile ducts decompression (BDD) and terms for radical operation performance; 2) to define criteria of effectiveness of the decompression and readiness of the patients for radical surgical treatment; 3) to analyze disorders in liver function and indices of immunoreactivity in relation to the method and duration of BDD; 4) to develop method of immunocompression for increase of effectiveness of BDD. The patients were divided in to three groups. 28 patients of group 1 had duration of jaundice up to 5 days and bilirubinemia up to 86.3 +/- 3.12 mmol/l. 35 patients of group 2 jaundice up to 15 days and bilirubinemia up to 184.7 +/- 4.22 mmol/l. In group 342 patients had bilirubinemia up to 124.4 +/- 2.23 mmol/l and cholangitis. External decompression of bile ducts quickly promotes restoration of drainage function of the liver and normalization of biochemical indexes. Restoration of immunological indexes in groups 2 and 3 is progressing slowly and demands immunocorrection. Indexes of immunoreactivity and biochemical data of functional status of the liver could serve as criteria of effectiveness of bile ducts decompression and possibility of radical surgical treatment. Regional immunocorrection is indicated for the patients' preparation for surgery.     

Testing an olivinite ramming mixture under the conditions of converter production at the Severstal' JSC

The possibility in principle of the production and application of ramming forsterite mixtures from olivinites of the weathering crust of the Kovdorsk Massif under the conditions of converter production at the Severstal' JSC is described.Translated from Ogneupory, No. 8, pp. 24–26, August, 1995.     

Inactivation and stabilization of urokinase fibrinolytic activity in vitro

The first and second internal transcribed spacers (ITS1, ITS2) as well as the intervening 5.8S coding region of the rRNA gene were characterized in eight Babesia canis isolates of differing geographic origin, vector specificity, and pathogenicity to dogs. The genotypes determined by sequencing segregated into three clearly separated groups close to or near the species level and correspond to the previously proposed subspecies B. canis canis, B. canis vogeli, and B. canis rossi. The three genotypes can be distinguished by Sau96I digestion of the polymerase chain reaction (PCR)-amplified rDNA target.     

The effect of protein-calorie food deficiency on the activity of enteral enzymes in growing rats]

30-day changes in enteral enzymes were followed up in test and control growing white rats. Test animals received protein- and calorie-deficient feeding. It was established that retardation of growth was more marked in protein than in calorie deficiency.