Development of a Technology, Processing Carbon-containing Fine-grained Waste into High-quality Briquette Fuel

This article provides an overview of existing methods and techniques for processing man-made carbonaceous wastes from the coke chemical and coal mining industries, i.e. coke and coal dust. The advantages and disadvantages of the methods are briefly described. Based on the advantages, an oil agglomeration method was chosen to enrich the coke and coal dust. This method is effective in the enrichment of fine-grained waste, such as coal and coke dust, while the yield of the carbonaceous concentrate is up to 85%. The results of the technical analysis of the initial carboncontaining wastes and the obtained coal concentrate are presented. The qualitative characteristics of the briquetted fuel obtained on the basis of the concentrate are given. The specifications of the briquetted fuel are presented and its advantages are described. Keywords: coke and coal dust, oil agglomeration, low ash concentrat

Electrochemical properties of metal complexes of dithio-acid derivatives and their application in extraction polarography

Metal complexes with dithiocarbamic (dtc), xanthic (xan) and dithiophosphoric (dtp) acids give rise to one or more polarographic waves in dimethylformamide and in mixtures of extracting solvents and ethanol. The electrons are found to be transferred stepwise in the case of unfilled d-shell metal complexes. The shift of half-wave potential depends on the ligand, increasing in the order dtp < xan < dtc. In solvents with low solvation power the electrode processes are more reversible. The linear dependence of the limiting current on the chelate concentration has been used for determining the metal in the organic phase without re-extraction. Pb(II), Bi(III) and As(III) have been separated with dtp as extractant, and the concentrations of Co(II), Ni(II) and Zn(II) complexes (simultaneously extracted) have been determined polarographically. © 1978

Reaction of 2,3-dimethylmercaptopropionic acid with methylene blue as an indicator reaction for the kinetic determination of selenium

A new indicator reaction between 2,3-dimethylmercaptopropionic acid and Methyl Blue was proposed for the kinetic determination of selenium. The optimal reaction conditions were found. A linear relationship was observed between the induction period and the Se(IV) concentration in the range between 0.9 and 9.6 ng/mL Se. Masking with EDTA and solvent extraction with diethyldithiophosphoric acid can be used for the separation of interfering elements forming complexes with the reagent. © 2001 MAIK "Nauka/Interperiodica"

Studying of the anti-ischemic action of <I>Rhaponticum uniflorum</I> and <I>Serratula centauroides</I> dry extracts on a model of bilateral occlusion of the carotid arteries

The aim of the study to evaluate the anti-ischemic effect of Serratula centauroides and Rhaponticum uniflorum dry extracts for bilateral carotid artery occlusion.Materials and methods. The studies were carried out on 77 Wistar rats. Rh. uniflorum and S. centauroides dry extracts at doses 50, 100, 200 mg/kg were administered intragastrically for 14 days prior to bilateral occlusion of the carotid arteries. To assess the anti-ischemic effect of the investigated agents, the total mortality, the dynamics of survival, the survival time, the animals’ neurological status were determined using a modified McGraw scale and the brain hydration degree.Results. S. centauroides at a dose 200 mg/kg reduced the percentage of animals’ death by 2.8 times (p ≤ 0.05) compared with the control. Life expectancy in animals treated with S. centauroides at doses 100 and 200 mg/kg and Rh. uniflorum at dose 100  mg/kg increased by 46, 52 and 64  %, respectively, compared to the control. The neurological deficit lowest severity was observed in animals treated with S. centauroides at dose 200 mg/kg. The most pronounced statistically significant decrease in the brain hydration level was observed in animals treated with Rh.  uniflorum at doses 100 and 200 mg/kg and S. centauroides at dose 100 mg/kg.Conclusion. S. centauroides and Rh. uniflorum dry extracts have an anti-ischemic effect in cerebral ischemia

Flow-injection systems for determining iron(III) and iodide with the use of catalytic reactions

Flow-injection systems with spectrophotometric detection were developed on the basic of catalytic reactions, namely, the Fe(III)-catalyzed oxidation of methanol with hydrogen peroxide and the iodide-catalyzed cerium-arsenite reaction. The developed systems were used to analyze industrial and natural waters. The detection limits attained were as low as 0.02 μg/mL of Fe(III) and 0.2 μg/mL of I- at relative standard deviations of 2-7% with the throughoutput of 35 and 25 h-1, respectively. © 1997 MAEe cyrillic signK Hayκa/Interperiodica Publishing

ANTIOXIDANT ACTIVITY OF THE DRY EXTRACT RHAPONTICUM UNIFLORUM (L.) DC

A study of the antioxidant activity of the in vitro dry extracts DER-1 and DER-2 derived from Rhaponticum uniflorum (L.) DC. It was established that the extracts have pronounced antiradical activity against DPPH-radical binding (IC50 (DER-2) = 2.0 mkg/ml). When studying the effect of the dry extracts a number of reactive oxygen species (O•-2, NO) revealed that they exhibit their ability to inactivate. With respect to Of-anion radical extracts show moderate and against NO - expressed antiradical activity (IC50 (DER-2) = 311.0 mkg/ml). We also revealed the presence of moderate Fe2+-chelating activity of the extracts studied. This effect is caused by apparently content of phenolic compounds, phenol carbonic acids, triterpene saponins and tannins

Density of wild boar population and spread of African swine fever in the Russian Federation

African swine fever (ASF) is a transboundary viral disease affecting all species of the Suidae family. It greatly undermines global pig industry and causes a significant damage to the ecology of the wild boar (Sus scrofa) which is a natural reservoir of the virus and is an intermediate  link in the epizootic process. Depopulation of wild boars is one of the measures taken to prevent spread of African swine fever in the Russian Federation. A threshold density of the wild boar population of 0.25 boars/1000 ha (0.025 boars/km2), according to the National Plan on the ASF Eradication in the Russian Federation, was achieved by 2020 in many RF Subjects. However, further analysis of the ASF epizootic situation shows that the measure has failed to eradicate the infection completely. A regression analysis showed statistically significant positive relationship between recurrent ASF outbreaks in the wild boar population and its density in a number of model subjects (N = 6). At the same time, there is no such dependence in other model subjects (N = 3), and  ASF outbreaks were recorded in wild boars at a density significantly lower than the recommended value. A review of foreign and national scientific publications has shown that such control methods as depopulation is just one part of the whole set of measures taken to eradicate African swine fever in the wild. The measure  is effective only when 70–80%  of animals are culled in a short time, which is practically impossible due to the high costs and some peculiarities of the population control and depopulation  process. Based on the results obtained, it can be concluded that a decrease in the number of wild boars does not guarantee to stop further spread of infection in the Russian Federation and it should be considered as just one part of the whole set of measures taken together with other anti-epizootic measures to eliminate and prevent ASF

Energy-protective function of plant composition in the experimental dyslipoproteidemia

The influence of the plant composition on the functional state of rat hepatic mitochondria and biochemical indices of energy metabolism was studied. Experiments were carried out on 42 white Wistar rats. The application of the plant composition increases contingency between oxidation and phosphorylation, as well as coefficients of respiratory stimulation and respiratory control by 17 % (р < 0.05) and 15 % (р < 0.05) respectively as compared to the control group. The tested herbal medicine increases the ATP content by 29 % (р < 0.05) and improves the activity of pyruvate kinase and H+-ATPase by 1.9 and 1.2 times respectively which indicates a partial restoration of energy metabolism in hepatocytes. The results of the research allow us to recommend the plant compositionfor its further study as a potential prospective hypolipidemic remedy for non-alcoholic fatty liver disease

EVALUATIONS OF ADVERSE DRUGS REACTIONS IN RUSSIA IN 2013

The article presents the results of pharmacoeconomic studies of adverse reactions to the drugs in Russian Federation