To determine the mass fraction of linolenic acid in flax
seed oil the authors developed a rapid method based on
the pulse method of nuclear magnetic resonance with
the use of NMR analyzers low resolution. This method
has some significant advantages compared with the
known method on the basis of chromatographic
method for the determination of the mass fraction of
linolenic acid in the oil extracted from the seeds of
flax, namely, does not require additional sample
preparation (extracting oil by solvent), eliminates the
use of toxic chemicals, requires a much lower
investment of time to conduct a single analysis, highly
automated, and eliminates the influence of human
factor on the research results. The method is based on
the revealed correlation between the weighted average
time spin-spin relaxation of protons contained in the
triacylglycerols of the oil of the flax seed, and a mass
fraction of linolenic acid in the seed oil at a
temperature of 23ºc. In article results of research of
influence of temperature on the weighted average time
spin-spin relaxation of protons contained in the flax
seed oil. Installed directly proportional linear
relationship between the temperature of flax seeds and
measured the average time spin-spin relaxation of
protons oil contained in the flax seeds with the correlation coefficient is 0,930, the temperature change
of the sample of seeds at 1 ° C leads to the change of
the coefficient is 0.011 kt. The developed
methodaccuracy in the temperature range from 20 to
26 ºC
At present, the state management of labor protection
in Russia adheres to the goals of harmonizing the
domestic legislation with the best world practices in
this field, eliminating internal contradictions in
legislation and building an active management
system for labor protection provided that a «favorable
climate» for the conduct of business activities is
provided. The regulatory and legal state regulation of
labor protection forms the basis for the development
and implementation of a set of measures to create
conditions for maximum protection of life and health
of workers. The authors consider the modern legal
framework and standards in the field of management
of labor protection in the organization. Reflects the
changes that have occurred in the Russian labor
legislation regarding the employer's duty to create
and maintain a labor protection management system.
The aspects of introduction of the health and safety
management system are considered taking into
account the requirements of the draft international
standard ISO/DIS 45001 «Occupational health and
safety management systems - Requirements with
guidance for use». It is shown that one of the modern
directions of standardization in the field of labor
protection is the development of risk management
and an analysis of foreign practice of legal regulation
of issues in the field of occupational safety. The
article is intended for specialists in documenting
processes carried out implementation, operation and
maintenance of a health and safety system, and on
students of higher education institutions and teaching staff
In recent years, the problem of deficiency of biologically active substances in a number of food products has arisen. This is due to a deterioration in the quality of seed and planting material and, accordingly, a decrease in the content of BAS in the cultivated fruit and vegetable raw materials. In this regard, processing companies are forced to fill the lack of vitamins and dyes with synthetic components. The aim of the research is to obtain concentrated food additives from domestic plant raw materials. To achieve this goal, the tasks of obtaining powders from fruits and berries are solved with maximum preservation of BAS of the raw material during drying. High-quality powders from fruits and berries are obtained by cryogenic technology, using liquid nitrogen at one or several stages of the process. As intermediate results of the research, the paper presents materials on the dispersion composition of cryopowders and the solubility of their various fractions in aqueous media. The technology of obtaining and using powdered food additives from fruits and berries, ground in liquid nitrogen, has been approved. The comparative characteristics of the composition cryopowders from apricot, sea-buckthorn, pumpkin, feijoa and persimmon are given. The results of the studies confirmed the expediency of using cryopowders from fruits and berries to enrich various food products
The article provides experimental data, which help to
substantiate the effectiveness and feasibility of
application of plant resources, produced by the rubbing
of the pears in the production process of puree as raw
material for the production of secondary food additive.
For the first time, with the use of pulsed NMR it is
established that processing of secondary resources of
pears processing in UHF EMF influence on the
redistribution of bound and free moisture, i.e., the
maximum transition was for linked moisture to free
moisture, noted in the processing of secondary
resources in UHF EMF with the rate of heating
(increase in temperature) 0,4 °С/s to a temperature of
60 °С. It is established that such processing of
secondary resources of processing of pears allows to
increase the average speed of the subsequent IR-drying
and reduce the time IR drying in 2 times in comparison
with IR-drying of control sample (without
pretreatment in UHF EMF). Pre-treatment of
secondary resources of processing of pears to UHF
EMF for the identified modes allows for their
subsequent IR-drying to reduce the loss of vitamin C,
23.9% and P-active substances – by 20.6% compared
with the control sample. We have developed technological modes of production of food additives
from secondary resources of processing of pears,
providing maximum preservation in its composition of
thermolabile biologically active substances – vitamin
C and P-active substances. On the basis of these
studies, there was developed a set of technical
documentation, including TU 10.39.25-423-
040801346-2016 "Food additive. Pear Powder" and a
technological instruction for the production of food
additives
The article analyzes the structures of domestic selfpropelled
potato harvesters, developed in 60-90th of the
last century. It considers their layout: based on selfpropelled
chassis NL-45, NL-65, NL-75, K-mounted
single-row and double-row 5B K-5A and KKSSH-2, on
the basis of MTZ-142 Four-KSKD-4; specialized
harvesters KSK-4-I, KSK-4A-1.We have disclosed the
advantages and disadvantages of each of the structures
shown the way forward. The analysis shows a general
trend of equipment self-propelled combines cartofeleuborochnyh
means to monitor the work of the
working bodies and councils-ment process, as well as
hydrostatic transmission based hydroficated bridges or
motor-wheels to run on high-styah soon. In the
arrangement of machines and their technological
schemes trend-Uwe crease width, equipment storage
hopper, enabling productivity-dit unloading products in
a number of oncoming traffic. We consider the design
perspective of modular self-propelled potato harvester
BCSC-4K, consisting of technological and power
module. Conducted owners-governmental tests combine
BCSC-4K display-whether it combines advantages over
KSK-4-I and KSK-4A-I performance and quality
indicators
In the present article, a technique for studying the
influence of the parameters of a drying plant on the
optimization criteria is described. The design of a
laboratory plant for drying bee-bread is presented. An
adequate empirical dependence of the effect of the
parameters of the process under study on the residual
moisture of bee-bread is established. An optimal
combination of factors has been revealed, which
makes it possible to minimize the residual moisture
of bee-bread
The article formulates and solves the task of discrete
control in the thermophilic stage of the composting
process. It is shown that considering the relay control
entity to maintain specified process conditions requires
the organization of the sliding mode. We have solved the
problem of minimizing the temperature deviation of the
substrate from the set values and the deviation of the
oxygen concentration in the gas phase of the bioreactor
from the specified values. The article shows the
algorithm to compute the discrete control of the
composting process in the thermophilic stage. This work
was prepared in the framework of the scientific project
16-48-230441 a(R) "Mathematical modeling of the
processes occurring in the automated installation for
year-round production of organic fertilizers in the
conditions of the Krasnodar region", financed by RFBR
and the administration of the Krasnodar region
We have experimentally studied fluctuations of power of an electric arc in different types of plasmatrons with different power supplies in the article. Influence of fluctuations of power of the plasmatron on technology parameters of a plasma stream (current, voltage, an enthalpy, temperature, speed of a plasma flow) and on process of forming of coatings at impulse plasma was experimentally shown that the nature of fluctuations depends from fluctuations of voltage of the power supply, plasmatron type and also from fluctuations of an electrical arc. The size of fluctuations of power can be 50-100%. It is experimentally shown that impulses of power of an electric arc are capable to complicate supply of sprayed powder in to the plasmatron. Such fluctuations do not make dispersion of the melted powder particles. In the work, we have drawn conclusions that large-scale pulsations are capable to worsen quality characteristics of plasma coatings significantly
The article is devoted to finding of the optimum
parameters for elastically damping mechanism (EDM)
which is located in transmission of machine-tractor unit
(MTU). The investigated MTU is based on the tractor
of 1.4 class in plowing mode. EDM is designed for
MTU in order to make its’ start smoothly, to reduce the
dynamic load in transmission, to protect engine from
the external load vibration. The “transmittance level”
(index T) is used as evaluation of the protective
mechanism quality. The study was carried out by
means of the experiment planning method, viz. the
central composition plan of second order with five
factors. A regression model for response function
(“transmittance level”) is given. This model takes into
account the chosen EDM characteristics. The statistical
analysis methods (Student’s t-test, Fisher’s test) were
used to study the regression model. The dependence of
response function on each factor apart, their cross
impact on the process are described. The system of
partial differential equations is obtained to find the
optimal values of parameters and response function.
The optimal value of a “transmittance level” can be
obtained by varying different EDM parameter values.
Optimal values of parameters and as result - response
function - allow improving of MTU functioning in
plowing mode
The article is devoted to the solution of the urgent task, which is to increase the reliability of the power supply systems of enterprises for processing agricultural products. The material of the article has a research character, which consists in the fact that the obtained expressions for the frequency characteristics of high-voltage induction motors allow us to investigate the symmetric modes of their operation by means of a more efficient and simple apparatus. A number of provisions of the article have a scientific novelty, which consists in obtaining frequency characteristics for induction motors as a result of the experiment. A convenient procedure for obtaining the frequency response of an induction motor based on the results of an experiment using the mathematical model of an induction motor in the coordinates of the generalized vector and the Fourier transform has been developed. As an example, oscillograms of the stator current of an induction motor of the A-12-52-4 type are given for the initial stage of the start-up. For the stator current of this induction motor, a transition is made from the phase coordinate system to the coordinates of the generalized vector. The dependences of the stator current on the D and Q axes on time are constructed. The real and imaginary parts of the frequency characteristic of the engine are calculated for sliding s = 1, the calculations are illustrated by the corresponding graphical characteristics. The results of the study are proposed to be used for the calculation of transients in power supply systems for enterprises engaged in the processing of agricultural products