The article considers the activities of a team of teachers and students of the Library Department of the Kurgan Regional College of Culture in creating of retrospective bibliographic indexes reflecting publications of different kinds (including for nowadays electronic ones) about this educational institution. The author shows the developing of different approaches to the selection and presentation of bibliographic data for two decades. During this period 3 issues of this manual have been published: “Kurgan Regional Specialized School (1956—1996). Documents and Facts” (2000), “Kurgan Regional Specialized School of Culture (1996—2001). Documents and Facts” (2001), “Kurgan Regional College of Culture (2002—2020). Documents and Facts” (2021). The importance of local history, factual and biographic information contained in these book editions is specially underlined.

AbstractThe grain production technology implies the need for fast and high-quality post-harvest processing. Grain should be brought to certain moisture and contamination conditions. It is particularly important to clean it from light impurities. The volume of grain production and consumption is constantly increasing, which necessitates the introduction of efficient separator designs. The quality of separating light impurities from grain can be enhanced by improving the design of known separators used in agriculture. The paper proposes to use a variable-pitch screw in the design of an air-screw separator. The screw with the housing form a screw aspiration channel used for the separation process. The study of the air flow movement in the screw channel is complicated because of its complex shape. Using computer modeling and experimental research, we determined the parameters of the air flow and established the performance of the separator, at which light impurities are separated according to the agrotechnical requirements.KeywordsGrain cleaningSeparatorTrajectoryAir flow

Various elastic elements are widely used in mechanical engineering structures: springs, shells, membranes, etc. In this case, the most widespread are springs - an elastic element designed to create a concentrated load. The spring can be made of any material with sufficiently high strength and elastic properties (steel, nickel, titanium alloys, bronze, plastic, wood, etc.). The main material for the manufacture of springs is spring steel (steel 70, steel 65G, steel 55S2, steel 50HFA, steel 60S2XA, etc.). The following requirements are imposed on the springs: high strength and elasticity, reliability of operation, high relaxation resistance and cyclic endurance, the ability to maintain their technical characteristics when working in various environments.

The study is aimed at solving an important problem – the regeneration of catalytic converters for the diesel engine porous block exhaust gases obtained by self-propagating high-temperature synthesis. Techniques and methods for regenerating porous walls of particulate filters and converters of diesel exhaust gases have been considered. It has been found that impregnating a ceramic block with a catalyst allows simultaneously reducing the content of the incomplete fuel combustion products CO and CxHy in the exhaust gases. It has been established that soot and coke particles can be removed from the catalyst surface by periodically feeding an aqueous or alcoholic carbamide (urea) solution to the converter or particulate filter inlet and adding antismoke additives to the fuel. A technique for reverse and direct purging of converters with compressed air from car receivers and back-purging with exhaust gases to activate the regeneration of catalytic converters and particulate filters is proposed.

Studies were carried out to find the new ways to improve the efficiency of iodine use for the young pigs. During the scientific and economic experiment it was found that bringing iodine to the physiological norm, in combination with introduction of 3% bentonite clay into the diets of young fattening pigs, provided a positive effect on the morphological composition of carcasses, slaughter parameters and meat quality of the pigs. So fattening the yelts with the diets with a physiological norm of iodine in combination with 3% bentonite clay allowed young pigs of the 3rd experimental group to reach a slaughter weight of 78.95 kg at the age of 8 months, which is 10.1% more than in the control group, and 4.2% and 2.5% more in comparison with the 1st and 2nd experimental groups. The slaughter yield in yelts of the 3rd experimental group increased by 2.43% (P<0.05) compared to the control group. The largest (30.17 cm2) area of the “rib eye” was recorded in the 3rd experimental group, which is 5.60% more than the control one, while the carcasses of pigs of the 3rd experimental group contained muscle tissue by 4.74% (P<0.05) more than the same in the control group. Analysis of the Musculus longissimus showed a significant increase in protein content in the 3rd experimental group by 1.22% compared to the control group (P<0.05). The protein-quality parameter was significantly higher in the muscle tissue of young pigs of the 3rd experimental group and amounted to 10.90 (P<0.05), which is 1.12% higher than in the muscle tissue of the control group yelts. The maximum content of oleic acid was found in the lard of animals of the 3rd experimental group — 49.59, which is 1.28% (P<0.05) higher than in the control group.

In Sverdlovsk region the Ural type of Holsteinized black-and-white cattle is raised and used. Admixing of Holstein line revealed a number of problems in the breeding of crossbred livestock, including decrease of the cows’ productive longevity. This poses new challenges for solving the issues of the herd reproduction and growing of young replacement livestock. The research of correlation between the dynamics of live weight gain by periods of growth along the young livestock lines is relevant and has practical significance. In result of the research it was found that the heifers of Vis Back Ideal 1013415 line outcompeted their peers from the Reflection Sovering line 198998 in terms of live weight in all periods, provided that they were raised under the same conditions, same feeding and same care; moreover all heifers had practically the same live weight at birth. At 6, 10 and 12 months of age, the difference in live weight was significant at p ≤ 0.05–0.01 in favor of heifers of the Vis Back Ideal 1013415 line. According to the periods of growth, a positive conjugation of body weight changes was revealed. The correlation between live body weight by periods and the age of the first insemination is negative.

The article presents the results of the study of indicators of the relaxation resistance of elastic elements made of bronze alloys. The issues of assessing the quality of the initial material and finished products from bronze alloys are considered. Comprehensive studies of the BrNHK bronze alloy for the manufacture of helical compression springs have been carried out. Prototypes were made, cyclic tests of helical compression springs made of BrNHK alloy were carried out. A comparative analysis of the results of an experimental study on the possibility of using the BrNHK bronze alloy as a material for the manufacture of springs is carried out. The questions of the influence of surface defects of the material on the quality of products and technological properties are considered.

The aim of this work is to study the effect that energy supplements provide on the digestibility and application of nutrients in high-yielding cows diets during their milking period. The scientific and economic experiment was run at CJSC “Glinki” in Kurgan region. For this experiment, three groups were formed, which consisted of Black-and-White cows, according to the principle of analogues. Studies showed that feeding cows with the energy supplement “Lakto S” increased the digestibility of dry matter by 1.68%; of organic matter — by 1.53%; of crude protein — by 2.25 (P < 0.05)%; of crude fiber — by 2.40%; of crude fat — by 3.47%; nitrogen-free extractable substances — by 0.84%, and also changed the concentration of hydrogen ions by 0.16 units, increased VFA by 15.51units (P > 0.05), changed the amount of acetic and propionic acids — by 2.48 and 0.70%, and reduced the level of total nitrogen and ammonia in the rumen of cows by 3.59 and 4.11% respectively. The energy supplement “Lacto S”, fed to the cows during their milking period, provided more efficient use of feed energy for milk production by 11.98% (12.47 MJ) (P < 0.05) in comparison with the control group. The zootechnical feasibility of using the energy supplements “Lacto S” and “Extima 100” in the diets of high-yielding cows in order to enhance the processes of digestion and metabolism in their bodies has been experimentally substantiated.

Introduction. The stimulation of the fermentation activity of baker's yeast in baking and giving additional nutritional value to mass consumption food products is an important area of ​​scientific research.Purpose. The purpose of the study is to evaluate the effect of partial replacement of a salt solution with an enzymatic hydrolyzate of cow colostrum on the activation of baking yeast Saccharomyces cerevisiae when kneading the dough and to study the possibility of enriching bakery products with biologically active peptides.Materials and Methods. The research materials were model dough samples prepared without yeast activation and on activated yeast using enzymatic hydrolyzate of bovine colostrum. The presence of peptides in the dough samples was determined on a MALDI-TOF mass spectrometer, decryption was performed using the Mascot database, the Peptide Fingerprint option (Matrix Science, USA) using the Protein NCBI database.Results. It has been established that the replacement of the sodium chloride solution used in the dough formulation with the enzymatic hydrolyzate of bovine colostrum has a positive effect on the activation of metabolic processes in the yeast cells of Saccharomyces cerevisiae. The results obtained indicate that, compared with the control, the lifting force of pressed baker's yeast with a complete replacement of the salt solution with the enzymatic hydrolyzate of cow colostrum increased by 26%, for dried yeast, the lifting force increased by 20% compared to the control sample. In model dough samples, a biologically active peptide present in the used enzymatic hydrolyzate of bovine colostrum was identified, the amino acid sequence and molecular weight of the isolated peptide were determined.Conclusions. The use of enzymatic hydrolyzate of bovine colostrum in the technology of bakery products will speed up the production process and enrich the bread with biologically active peptides. But at the same time, it is necessary to conduct additional studies on the effect of activated yeast on the quality and shelf life of biologically active peptides in finished bread.

Slide gate valves are widely used as shut-off and control valves in technological lines of the oil and gas industry. The most important tasks that arise when designing a gate valve include the calculation of the hydraulic characteristics of the working medium flow and the determination of throughput. The article presents an overview of the main methods for calculating the throughput of pipeline fittings, indicates their advantages and drawbacks. It proposes a method for determining the throughput and calculating the hydraulic characteristics of the working medium flow of a high-pressure slide gate valve based on a computational-theoretical study using a modern complex of engineering analysis. A mathematical model of the working medium flow was developed and a numerical calculation performed. The correctness of the operation of the mathematical model was confirmed by comparing the data of computational-theoretical and experimental research. Based on the results of calculations and assessment of their correspondence to the real flow process in the physical prototype of the slide gate valve, conclusions were drawn about the applicability of the mathematical model.