The article presents the results of studying the influence of some types of packaging materials used in conjunction with Inter Fresh’s ethylene absorber (sachets) on commercial quality and losses of Alexandria zucchini, Lyubov sweet pepper and tomatoes cv. Inkas during storage. The study was carried out using StePac Xtend bags, creating a modified atmosphere. The objects of research were stored for 14 days at a temperature of 8 – 10 °С and air relative humidity of 90±3 %. One sachet for ethylene absorption was placed in Xtend bags. It was found that when stored under these conditions, the total weight loss is: for tomatoes – 0.3% when using Xtend bags and Inter Fresh ethylene absorbers, 1.8% when using traditional packaging materials; for zucchini – 0.4% when using Xtend bags and Inter Fresh ethylene absorbers, 1.6% when using traditional packaging materials. Losses associated with microbiological damage during storage of zucchini and tomatoes were not observed. During storage of sweet pepper microbiological spoilage took place, which, apparently, was the result of increased contamination with pathogenic microorganisms
The purpose of the study was to substantiate the rigid parameters of tyres in propulsion units for the combine harvesters of high performance. A research method is analytical with the use of a mathematical model of the combine harvester in which damping and rigidity of the drive axle tyres in circumferential and radial directions are taken into account. Values of the rational rigid characteristics of the pneumatic tyre have been generally determined by the ability of the tyre to be deformed so that to reduce the angular, vertical and horizontal skeleton oscillations of a combine harvester to ensure the high-quality technological process of the threshing and harvesting. The specified circumstance gains the special importance at the development and introduction of the new tyre modes for the combine harvesters of high performance. The analysis of the conducted analytical researches has been showed the expediency of using the threads of a cord in the propulsion unit of combine harvesters instead of diagonal or radial tyres of the same standard size with an original position of them. The offered pneumatic tyre of 30.5E-32 used as the leading one, and promotes the reduction of the angular oscillation amplitude and operating speed of a combine and also angular and vertical accelerations up to 1.42 times
The article has examined the application and found the
processes that need to be automated. The advantages
of this method of automation of the technical support
service are considered. Using the unified modeling
language (UML), an information system model is
constructed based on the information received. Using
the developed model, the method of accounting for
channel services and equipment will be automated, as
well as the process of interaction with customers
Human resources have recently reasonably gained more and more importance. Today, along with material, intellectual, informational and financial resources, they affect the efficiency of enterprises and organizations. Competent assessment of human resources, a clear understanding of means of interaction with staff and developing human potential are the basis for the effective work of both human resources departments and organizations as a whole. The complexity of assessing human resources necessitates the development of a toolkit, the use of which will simplify it and ensure that one receives the most accurate advice and assistance in making management decisions. A promising direction for the implementation of the designated toolkit may be the development of a decision support system, within which, among other things, the possibility of a multi-criteria analysis of alternatives will be available. Due to the fact that there are no methods for multi-criteria analysis of alternatives intended solely for assessing human resources, it is necessary to conduct a thorough analysis, the main purpose of which is to identify the most suitable basis for further adaptation and development. After conducting preliminary studies, the TOPSIS, MAUT, AHP and ELECTRE methods were chosen as the most promising for solving the problem
The production of eggs is one of the most important indicators of the productivity of poultry, including chickens The main purpose of breeding chickens in the collections of genetic resources - conservation of genetic diversity. The chickens from the collection of genetic resources it is also possible to receive products, for example, in the form of eggs. The account of the egg productivity of the chickens showed that the intensity of egg production varies among representatives of different directions of productivity. The most stable egg-laying was possessed by chickens of breeds New Hampshire, Black Australian, Dutch white. These breeds are bred as breeds of egg direction of productivity. But they are characterized by long downturns in egg production, lasting more than 7 days. Chickens of meat direction by stable, but low intensity of egg production. All the chickens had a short period For all chickens a short period is characteristic, when the egg-laying is kept at a certain level. It is 30-40 days, after which there is a gradual decrease in this indicator. Such a high level of genetic diversity in egg production in gene pool makes it possible to use this bird as a model object for studying its features
To develop new promising soybean growth regulators, we have synthesized series of derivatives of nitrogen-containing heterocycles. Synthesized compounds have been studied as potential soybean growth regulators. Substances with a high growth stimulating effect have been found. The growth regulators affected the branching coefficient, the number of seeds in the beans and their weight. The yield increased by 6.7-23.4%, the quality of grain increased
The article gives results of a comparative study of the growth and development of young cattle of Holstein breed belonging to the Reflection Sovering and Vis Baidial lines, born with the method of transplantation of embryos, and their coevals born with a standard method. Technology of growing of young cattle in both groups was identical, accepted in the economy. During suckling period, the heifers got 300 kg of full-milk. During a period from 3 to 8 months, they were contained in cages for small group maintenance, from an 8 month age, they were contained loose, on pasture grounds. Living mass and average daily increases of experimental heifers changed differently. The rates of height and average daily increases in an experimental group turned out to be higher, than for coevals of the control group. It is proved by the researches, that heifers born with the method of transplantation of embryos are equal to ones who were born with a traditional method in the rates of height and development and even excel coevals at the certain periods. In the age of the first insemination, living mass of heifers of the experimental group was 365 kg, which was 14 kg more compared to coevals of the control group. In all studied age-related periods, heifers of the experimental group excelled coevals of the control group in average daily increases. From their birth and up to 14-th month age, exceeding on increases was 37gr; to the age of the first insemination, heifers of the experimental group were more developed. Taking into account the genetic potential in heifer embryos and their best height and development, it proves the expediency of the use of transplantation of embryos
High-strength steels are used to increase the reliability of potato harvesters. With the advent of new materials and new technologies in agricultural engineering, it is possible to significantly reduce the mass of working bodies, to reduce energy costs. The elastic system of the composite elevator bar, unbalanced by the impact of the component of the potato heap, is in oscillatory motion. An increase in the height of the fall, and hence the speed of collision with the bar of the component of the potato heap, determines the amount of deflection of the composite bar. During vibrations, in addition to static deformations, dynamic ones are added, depending on the magnitude of the impact force. It was established that a bar made of composite material should have the following parameters: elastic modulus E = 55000 MPa; the diameter of the composite bar d = 0,012 m
The article presents results of theoretical and experimental studies on the justification and experimental confirmation of the influence of hydraulic seeding process modes on the parameters of row seeding technology for seedling crops. It is hypothesized that it is possible to ensure a uniform depth of seeding within 0.5...1.5 mm by feeding seeds into the soil by hydraulic means using a liquid. We have compiled a nomogram of the influence of the height of the initial level of the liquid and its density on the amount of pressure exerted by it on the soil. It was found that the pressure of the polydisperse system on the soil increases with both the density of the liquid and the height of the initial liquid level. Experimental studies have been conducted to study the effect of the pressure exerted by the liquid on the soil and the speed of the drill on the depth of furrow formation and the depth of wetting the soil. The article determines empirical dependences of furrow depth on the pressure exerted on it for different types of soils. It is found that the depth of soil wetting decreases with increasing speed of the drill
Production and processing of grains formed in the national economic system of the country a number of cereals-governmental sectors, such as grain production, grain elevator industry, flour, cereals and mixed fodder production, which constitute the grain complex country. The significance and role of the grain as a commodity in the state economy can not be overestimated. This product is totally liquid, which has a constant, steady demand at any time of the year, in any region. Ongoing measures to increase grain production and improve its implementation did not have a complex character, therefore, insignificant effect on the efficiency of the industry and the competitiveness of grain production. The shortage was covered by imports. According to the characteristics of management in agriculture, it should be emphasized that the absence of objective and timely information at all stages of production of the plant-breeding, and as a result, non-optimal choice of technology of cultivation of agricultural crops, might result in the fact that the cost of labor and material resources increases significantly, the company does not receive profits, and sometimes suffers losses. When selecting cultivation technology for agricultural crops, an agronomist has a database of more than a hundred times-personal of alternative technologies for each crop. It is up to the decision-maker (DMP) to find specific criteria to select the most suitable (for the owners and the climatic zone) technology of cultivating for the culture. These circumstances explain the relevance of in-depth research of economic and mathematical models and methods of analysis and evaluation of the economic efficiency of technologies of cultivation agricultural crops. The article deals with the process of developing a complex of mathematical models and methods for evaluating alternative technologies for agricultural production (using the example of crop production), their software implementation, and the main scientific results of the project