The article presents results of design development and
calculation methodology for corn harvesters stalks
shearing mechanism constructed as a module with a
storage device. According to the number of
engagement rows, these modules are mounted on the
sweep frame of corn harvesters. All modules have the
ability to accumulate energy, the rotation of saws in
which at each time point does not depend on saws
rotation in other modules and they are not connected
with each other and with other mechanisms.
Constructive execution of corn stalks shearing
mechanism with accumulation device allows rapid
separation of each module from the frame of the corn
harvester in order to eliminate possible problems
(change of saw or the entire module assembly). The
methods of the energy storage calculation and electric
motor power selection for each module are presented
At present, electrochemical analysis methods are increasingly used to solve the problem of research on quantitative and qualitative indicators of organic substances. One of the most common electrochemical methods of analysis is conductometry. Along with the straight line, indirect conductometry is often used, in which the substances under analysis react with the corresponding components before the measurement, and the fixed change in electrical conductivity is determined exclusively by the presence of the products of the reaction that occurred. A necessary condition for the application of this method is the presence of ions in the reaction medium, and since the pectic substances are polyelectrolytes, this condition is met, which allows us to use the conductometric titration method to determine the quantitative and qualitative characteristics of pectic substances. The technique we propose relates to technical biochemistry, namely, to the determination of the amount of pectin substances in plant raw materials. We have prepared "standardized" solutions of fractions of pectin substances. Samples of solutions of fractions are taken. Saponification of fractions of pectin substances in the samples of the solutions under analysis is carried out with 2.5 ml of 40% NaOH solution. Fractions of the pectin substances are precipitated with 2.5 ml of concentrated HCl. The solutions to be analyzed are centrifuged in 50 ml test strips at a rotor speed of at least 5000 rpm for 5-7 min. Suspensions of pectin fractions with distilled water are suspended in a beaker for titration with a magnetic stirrer for at least 30 minutes. Conductometric titration of suspensions of precipitates of fractions of pectic substances is carried out with stirring. Based on the results of conductometric titration, graphs are plotted, according to which the volume of titrant consumed for titration of pectic acid is established. Calculation of the mass fraction of fractions of pectic substances is carried out according to the formula. The methodology is distinguished by the simplicity of implementation, which makes it possible to obtain accurate data at high convergence of parallel analyzes, and it saves labor and time costs at all stages of the process
One of the main ways to increase the economic efficiency and environmental safety of the food industry is the introduction of low-waste and non-waste technologies. A vivid example of the technologies of this group is the production of pectin and pectin products from processing residues for food needs of plant objects - various fruits. We have developed a number of ways of obtaining pectin products from unconventional raw materials objects and on their basis we propose technologies for obtaining commodity pectin and pectin extracts from fruit shells of soya, sainfoin, castor oil, tunga and black nuts. For the purpose of operational analytical control of the pectin complex of the listed raw materials, two methods have been proposed, one of which is presented in the article. The presented technique allows determining the amount of pectin by its fractions at any company of pectin production with minimum expenditure of labor and energy. The methodology is implemented as follows. We dry paper folded filters to constant weight. Standardized solutions of protopectin and hydratopectin are prepared. Samples are taken. Then we neutralize the acid solution of protopectin solution and saponize the pectin substances in the analyzed solutions with 40% NaOH solution for 15 minutes. After that, the pectic substances are precipitated with concentrated HCl and the precipitates are filtered. Then the precipitates on the filters are repeatedly washed with cold distilled water to completely remove the chlorine ions. Filters with precipitation are dried to constant weight. The mass fraction of fractions of pectin substances is calculated by formulas for hydratopectin and protopectin alone. The method as a whole makes it possible to improve the accuracy of the results of determining the mass fraction of pectic substances in plant raw materials, to reduce labor and time costs, and to exclude the use of specific equipment
To ensure the safety of food production of frozen dessert with the addition of sesame flour, the system of critical control points for risk analysis (HACCP) was applied to the manufacturing process. Biological, chemical and physical hazards that could exist at every stage of frozen dessert production have been identified. Critical control points have been identified that include pasteurization and milling. The introduction of the HACCP system in food production can effectively ensure the safety and quality of food products, expand the market and improve the level of management of producers
This article deals with the description of axial contactless electric machine generator. The machine's structure and principles of operation is described and the mathematical model, for the research of the transient process in it, are presented
In the article we present the results of the researches of creation of methods of calculation of the acoustic-magnetic devices. The technique, which allows to de-sign devices of various sizes and types has been pro-posed
DEVELOPMENT OF THE MODEL OF DOCUMENTS OF QUALITY MANAGEMENT SYSTEM OF HIGHER EDUCATIONAL INSTITUTION
In the article the method of the development of the model of documents of management system of quality of Higher Educational Institution is presented. The method of modeling includes omnibus analysis and documents synthesis
The water treatment and water disposal generalized technological scheme implemented in a system of water extraction from the subterranean and surface water is represented. The basic units and work principle of a system are described. The main parameters of treatment are presented and a comparison of water treatment methods is done. It is shown that the presented system can be useful for wastes post-treatment
In this article, the second group of optimum speed of diagrams of moving actuating device of electric drive of alternating current is described. Parameters, condi-tions of existence and analytical dependences of an angle of rotation of actuating device of electric drive of alternating current on time for each of diagrams are defined
The article presents the results of studies on the
preparation of inflorescences of sunflower for
production of food pectin extract. The authors study
the influence of enzyme preparations on the
organoleptic and physical and chemical parameters
of hydropectin and the optimum parameters of
enzymatic treatment, such as concentration of the
used enzyme preparations, temperature and
duration of treatment