Ecological and philosophical aspects of the pre-professional and professional training of agro-industrial complex specialists

Annotation. The article dedicated to substantiation necessity for serious ecologically oriented pre-professional professional training for future specialists agro-industrial complex of the country based on a holistic and systematic approaches. The vital importance of preservation natural wealth is attributable to the global environmental crisis closely related to the crisis of the spirituality of humanity. The purpose of our study was in the identification the degree of dominance of such a universal human value as “nature” using the express methods “Dominant”. The processing of the results showed that the overwhelming majority of respondents do not see and do not understand the importance of nature in ensuring the life and health of each person and humanity as a whole. This confirms the authors’ idea of the need for reviewing the curriculum and programs with the aim of strengthening their environmental component for the formation a high level of environmental culture of future specialists in the agro-industrial complex, because in their professional activities they are directly related to the use of the natural resources of our country.

Methods gas chromatography, capillary electrophoresis, chromatography-mass spectrometry in analytical control of alcoholic beverages

Разработаны, внедрены в практику аналитического контроля и применены в научных исследованиях инструментальные экспрессные методики определения химического состава продуктов, полупродуктов и отходов спиртового и ликероводочного производства. Получены новые экспериментальные данные, и выявлены закономерности кинетики биотехнологических процессов. Developed, implemented in the practice of analytical control and applied in scientific research instrumental express methods for determining the chemical composition of products, intermediates and waste of alcohol and distillery production. New experimental data are obtained and the regularities of the kinetics of biotechnological processes are revealed.

Analysis of Wood Chip Characteristics for Energy Production in Lithuania

Wood chips and logging residues currently comprise the largest share of biomass fuels used for heat generation in district heating plants and are provided by a variety of suppliers. Ash and moisture contents, as well as the calorific value, may vary considerably depending on the composition of the fuel, seasonality, location, and other factors. This paper provides the summarized results of the main characteristics of wood chip moisture and ash content and calorific value, experimentally tested for a significant range of samples. Chip samples were collected from two district heating companies and tested for a significant range of samples. Chip samples were collected from two district heating companies and tested for a 3-year period. The data on fuel chip prices were taken from the electronic wood chip trading platform. The tests were performed using standard express methods, where two sub-samples were taken and analyzed from every chip sample. It was determined that the moisture content of the wood chips varied from 35% to 45%, the calorific value from 18.4 to 19.6 MJ/kg, and the ash content from 0.5% to 4.5%. The calculated relative expanded uncertainty of the moisture content measurement was ±2.1%, of calorific value—±1.5%, and of ash—±1.0%. The repeatability of the results was estimated as the pooled standard deviation.

Prospects for international integrated research of the carbon cycle in the system "soil-plant-atmosphere"

Ukraine is located about at the latitude of France, the northern part of the United States and southern Canada and has similar to these countries natural conditions. Different in terms of soil and climate conditions, the regions of agriculture in Ukraine can be considered as analogues of similar natural conditions of agricultural areas in other parts of the world. Soils with a high carbon content are more productive and able to better filter and purify water. Water contained in the soil serves as a moisture source for 90% of world agricultural production. One of the main areas of research is the study of the ratios of main products and by-products of yield, as well as root and plant residues when having different soil fertility and using promising varieties and hybrids of crops. The use of optical express methods should be carried out according to the stages of organogenesis of field crops, which will enable to specify the relationships between them, to develop criteria and indicators for effective regulation of nitrogen and carbon cycle in the system "soil - plant - atmosphere", to develop models of formation and transformation of root and other plant residues taking into account changing agrometeorological factors, crop rotations, features of the branch structure of agricultural production, varieties and hybrids of field crops. In the future, this will enable to determine the areas in the selection aimed at accumulating root mass and achieving garanteed deficit-free balance of organic carbon in the soil. The research will enable to purposefully and effectively regulate the cycle of carbon and nitrogen, both at the level of individual agricultural production systems and on the scale of the same type of agricultural areas and regions, taking into account the whole set of variables, including features of the sectoral structure of production, climate change, etc.

Analysis of effectivity of the tickborne encephalitis virus detection methods in ixodid ticks

Tick-borne encephalitis (TBE) is transmissible viral disease widely common in temperate zone of Eurasia. ELISA and PCR are used for express identification of the vector’s infection, but the results of the two methods often do not agree. Aim of the work is comparative analysis for TBE virus of Ixodid ticks from nature using complex of methods, including ELISA, PCR, and isolation of the virus in laboratory mice. 18608 Ixodid ticks were collected during 2013-2019 in TBE natural foci of the Baikal Region. The ticks suspensions were examined individually, using ELISA (n=17610) and PCR (n=2999). Suckling mice were inoculated with the suspensions positive in the both tests. The TBEV antigen was found in 1.2 % of ticks in average. All ticks positive in ELISA were examined in PCR (Group 1). Randomly selected part of negative-ELISA samples were examined in PCR too (Group 2). The PCR results were positive in 68.9±3.13 % of the Group 1, with average Ct index 24.6±0.38. Positive results of PCR in Group 2 accounted for just 2.7±0.31 % with average Ct index 31.0±0.70. The average Ct margin of the Groups 1 and 2 is statistically significant (p < 0.001; df = 118). Isolation of strains was significantly more successful in Group 1 (21.7±2.77 %), than in Group 2 (8.2±5.26 %; p < 0.05; df = 50). ELISA is more useful for examining large amounts of ticks. To get a more complex picture about epidemically dangerous part of the vectors in TBE natural foci, the results of the two express-methods is better to sum. The isolation of the virus is useful to carry out of the samples positive in ELISA and PCR concurrently.

Estimation of 90Sr content in wood of scots pine based on measurement surface flux density of beta-particles from stem bark

This paper presents an approach for indirect measuring of 90Sr activity concentration in stem wood of Scots pine`s live trees within the Chernobyl exclusion zone based on values of beta-particles surface flux density from stem bark at a thee height of 1.3 m above the forest floor that obtained by use STORA-TU RKS-01 radiometer-dosimeter under field condition. The similar express-methods often consider in scientific publications so as they allow to obtain probable levels of radiation contamination without taking samples for laboratory measurements. That in turn can be used to optimize sampling or for example in the case of the need to preserve the intact initial state of the biota during long-term in situ or/and in vivo observations. The empirical data for validation of the method have received on 13 experimental sites of artificial (plantation) even-aged stands which consist only of one woody species: Scots pine. The correlation analysis discovered statistical significant relation at p-value=0.05 between arithmetic averages of beta-particles surface flux density from stem bark of pine trees at the forest sites and 90Sr activity concentration in stem wood elements (sap wood, heartwood and all stem wood), and functional dependencies among these parameters are described by a simple linear equation with only one slope parameters (R2 = 0.90–0.96) whose predicted values for sap wood, heartwood, and all stem wood are (± standard deviation) 23.1±8.5, 42.3±10.3, and 26.8±6.8 Bq·cm2·min·(kg·pcs)-1, respectively. Moreover, the influence of biometric indicators of individual trees (diameter, height, age) on this pattern was not detected. However, the average diameter (DBH) of stands has the strongest influence among forest inventory indicators on the value of the 90Sr activity concentration ratio between sap wood and heartwood (r = 0.93), that is, the radial distribution of the studied radionuclide in stem wood of pine trees. The results of these studies should be confirmed by a larger collection of observations for Scots pine given the small sample size for her in this paper. Also, scientists are necessary to include empirical data for other major forest-forming woody species within the research region due to the importance of using express-methods of radioactive contamination levels estimation for the planning and optimization of forest management.

Application of gamma-ray spectroscopy and IR-spectroscopy methods for the purposes of ore geology in the Timan-Pechora Oil and Gas Province (the case of Ukhta Region)

Two express methods are presented in this paper. The first method is a high-resolution gamma-spectroscopic method based on a germanium detector, the second method is an IR-spectroscopic method. The applied complex of methods allows to determine the sources of uranium and thorium, identify the rhythms of uranium accumulation associated with regional events; identify areas with a high content of uranium due to the influence of local sources (faults, hydrothermal, etc.); determine the amount of authigenous uranium in the composition of total uranium; determine thermal maturity of organic matter in shales without their preliminary demineralization. To identify levels of increased uranium intensity in the high-carbon strata, a set of indicators has been proposed, which includes both applied indicators in practice of geological work and new indicators. New indicators have been tested on the collection of shale reference samples. For them, values ​​were established that characterize the processes of uranium accumulation and uranium removal. On the example of Ukhta Region according to the proposed indicators, the sections from the Vendian-Riphean to Domanic inclusive were interpreted. The performed work showed the possibility of comparing the calculated gamma-spectroscopic data with the data of other methods. This opens up a broader perspective for the use of express non-destructive gamma-spectroscopic method for detecting levels with a high content of uranium in the shale rocks, to which ore-bearing concentrations of a number of metals are also confined.

Express Methods and Procedures for Determination of the Main Egg Quality Indicators

The article considers the methods, procedures and results of experimental studies of the main egg quality indicators. The offered express methods and the automated installation provide definition of the weight, the form and density of egg. Based on the results of experimental studies of egg parameters, the express method of determining the volume of the egg through the area of the longitudinal section and the small diameter of the egg is substantiated. The express method for density determination by direct mass measurement and volume calculation gives minimal absolute error and provides a six time increase in performance, compared to the direct method.