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- ДокументFEATURES OF THE CHEMICAL COMPOSITION OF CORN GRITS AT THE DIFFERENT DEGERMINATOR MODES IN THE DENT CORN PROCESSING(2020) R. Rybchynskyi, S. Sots, I. KustovThis article is devoted to the study of transforming the chemical composition of corn grits at the different operation modes of degerminator in the dent corn processing. The experiment was conducted in industrial conditions on Skvyrskyi grain processing factory Ltd. during the processing of kernels using the degerminator of Bühler company. The operation modes of the degerminator were changed for 5 times during the experiment by means of the regulation of the gap between the shell and the drum. The study has shown that in terms of the low operation mode of the degerminator (the passage of the sieve Ø3.0 – 34.9%) there is a high output of fine fractions of the intermediate products, but the quality level of the overtail product of the degerminator is the best by fat content 1.81% and crude fiber content 6.72%, which indicates a minimal germ and bran content. In case of the increase of the gap (the passage of the sieve Ø3.0 – 12.4%), the output of fine fractions of the intermediate products, as well as the output of feed germ meal, declines, at the same time the overtail product has the high number of remnants of the germ and bran after the degerminator, as the fat content increases to 2.80% and crude fiber content increases to 9.82%. It was also found that the change of degerminator modes (increase in the passage of the sieve Ø 3.0 from 34.9 to 12.4%) leads to a decrease in the starch content from 79.36 to 75.43%, the protein content does not change. In order to provide the high quality of corn groats products, it is advisable to control the quality of the overtail products of the degerminator by the fat content. The fat content in the overtail product must not be higher than 2.2% – during the production of long shelf life products, and not higher than 2.5% – during the production of common corn products. For prompt regulation of the degerminator operation modes, it was offered to use release indicator, which can be determined by means of sieving of the 100 g of the overtail products using the Ø 3.0 sieve. In order to provide the fat content in groats within 0.6–0.8% and 0.8–1.0%, the general extraction of the fine products (release indicator) with the Ø 3.0 sieve use in the dent corn processing should vary within the range of 27–32% and 22–27%, respectively.
- ДокументRESEARCH OF THE BACTERICIDAL PROPERTIES AND TOXICITY OF COMPOSITIONS FOR STONE FRUIT PRESERVATION(2020) A. Dubinina, T. Letuta, V. NovikovaDamage of stone fruit during storage begins with the development of mycelial fungi on their surface that destroy the shell of a fruit and its anatomical integrity. Therefore, developing new tools for processing stone fruits on the basis of components harmless to people is a topical task of the modern agricultural, phytochemical, and biological industries. Nine compositions from extracts of medicinal plants and 2% of chitosan have been developed. The raw materials used to obtain extracts were: aloe leaves, camomile inflorescences, spruce bark (in the ratios 4:3:2, 5:4:3, 3:1:2, samples 1, 2, 3, respectively); eucalyptus leaves, basil herbs, thyme herbs (in the ratios 1:2:1, 2:4:3, 2:5:2, samples 4, 5, 6, respectively); lemon balm leaves, sage leaves, verbena grass (in the ratios 3:2:1, 4:3:2, 3:1:1, samples 7, 8, 9, respectively). All the compositions have been tested for fungicidal properties against Monilinia laxa and for antimicrobial activity by the sanitary-bacteriological method, and for toxicity by bacteriological methods (the method of direct inoculation on blood agar and the method of diffusion into agar). In all the samples studied, inhibited growth of the culture of the agent causing stone fruit moniliosis has been detected. All nine compositions have revealed antimicrobial action against Bacillus cereus ATCC 107-02, Escherichia coli ATCC-25922, and Candida albicans ATCC-885-653, with the best results in samples 1, 2, 3, 4, 6, 9. In the study of toxicity by direct inoculation on blood agar, samples 1, 2, 6 caused hemolysis of erythrocytes only in the area of application of the sample. Other samples did not show hemolytic activity. The study has shown that samples 3, 4, 9 are safe for humans, they demonstrate fungicidal properties and antimicrobial action against pathogens of stone fruits, which makes it possible to use them as components of chitosan-based film-forming compositions during storage.
- ДокументIMPROVING THE QUALITY OF EXPORT CONSIGNMENTS OF CLASS 4 WHEAT INTENDED TO BE USED AS FOOD(2020) G. Stankevych, A. Borta, A. PenakiIn Ukraine, the gross harvest of grain, including wheat, is growing from year to year. However, along with this, there is a steady tendency towards deterioration in the technological properties of wheat grain: the share of food grain is reduced in comparison with non-food wheat. That is why an important yet little studied issue is how to form export consignments with the use of grain which is substandard by some quality indicators. Primarily, this relates to class 4 non-food wheat grain. In the work, the changes and reproducibility of the quality indicators of consignments formed from different quantities of class 4 wheat of different quality have been studied. It has been shown that export consignments of food wheat can be formed from local batches of non-food wheat. On analysing their class-making characteristics, the quantitative and qualitative parameters have been determined for 11 samples of class 4 soft wheat (harvested in 2019) selected at enterprises of the Odessa Region, and for batches of export wheat formed from these samples by mixing. It has been shown that mixing individual local batches of wheat grain, which belong to class 4 by their quality characteristics, makes it possible to obtain export consignments of wheat conforming to the food class standards. It has been established that the more local batches are mixed, the greater are the differences between the calculated weighed average quality indicators and the experimentally obtained values of the same parameters. The class-making parameters “quantity and quality of gluten” do not always obey the law of mixing 2–4-component mixtures, and can behave in a most unpredictable way. This applies mainly to consignments formed on the basis of local batches where a lot of grains are damaged by the sunn pest. The rest of the quality parameters, though different from the calculated data, are within the tolerance limits for each parameter. It has also been shown that from non-food wheat grains (class 4), by using linear programming methods implemented in the Microsoft Excel spreadsheet, one can obtain the optimal export consignments satisfying all the requirements for food wheat quality (class 3). Thus, exporting enterprises, due to the difference in prices, can receive additional profit. When a consignment is formed, the calculated quality parameters can sometimes differ from the final quality characteristics needed for the intended purpose of the export consignment. Therefore, it is not only necessary to calculate the weighed averages of the consignment quality, but also to form a test batch and experimentally determine its quality indicators in the laboratory, because some of them can deviate towards better quality as well as towards deterioration.
- ДокументINVESTIGATION OF THE STRUCTURE OF WATER-SOLUBLE GLUCAN YEAST SACCHAROMYCES CEREVISIAE(2020) N. Cherno, K. NaumenkoIt is known that a well-functioning immune system is important for human health. There are many natural and synthetic preparation that are widely used as immunomodulators. One such natural preparat is β-glucan. Beta-glucans are a group of natural polysaccharides. They are recognized as an effective immunocorrector. Their use is advisable both for the prevention of immunodeficiency pathologies and for the complex treatment of many diseases from cardiovascular to oncological. The physiological activity of β-glucan depends on the type and configuration between monosaccharide residues, branching and conformation of macromolecules, solubility in water. One major source of β-glucan is the baker’s yeast Saccharomyces cerevisiae. Much research has been carried out over the years examining cell wall glucans from Saccharomyces cerevisiae. This work is the development devoted to the characterization of water-soluble beta-glucan obtained as a result of controlled degradation with the enzyme Rovabio Excel AP of glucan cell walls of yeast Saccharomyces cerevisiae. In this study conditions were selected which allow to accumulate the maximum water-soluble fractions with a molecular mass of 1–30 kDa presumably as fractions with a high immunomodulatory effect. The results of the paper show that glucan can be isolated from Saccharomyces cerevisiae in very pure form by the method used in this study. Thus structural analysis gives reliable results. The structural characterization of pure product was performed using the common analytical procedures: enzymes hudrolyses and spectral analyses FTIR, NMR spectroscopy. On the basis of the obtained results it was concluded that investigated glucan is a (1→3)-β-linked glucose polymer with (1→6)-β-linked side chains with sparsely branched. Further work will concern the physiological effect of water-soluble glucan in comparision to the native glucan. The structural requirements for example for an immunomodulation in humans or animals are still under discussion.
- ДокументDEVELOPING A TECHNOLOGY OF LOCAL WINES WITH THE ENHANCED AROMATIC PROFILE(2020) A. Bezusov, I. Kalmykova, M. Bilko, T. Melikh, V ShcherbinaDifferent methods of enhancing the aromatic profile of wines are researched throughout the world. One of them consists in adding unsaturated fatty acids to must as the yeast feeding. This work considers how the aromatic profile of dry white table wine made from the local grape variety Aromatny is influenced by the feeding that contains olive oil (a source of oleic acid) and the enzyme lipase and is added to must in combination with rehydrated active dry yeast Anchor Alchemy I (the species Saccharomyces cerevisiae). This method has been compared with the two other ones: with the classic method of obtaining dry white table wines by must fermentation (control) and with the sur lie method (when the dry white table wine material is aged on the lees for three months following the end of the must fermentation process). In the wines under study, 19 volatile compounds have been identified and quantified. These compounds, which are the most noticeable and active agents in aroma formation, include higher alcohols, organic acids, complex esters, aldehydes, terpene alcohols. The sample where the feeding was added is substantially higher in aroma-forming compounds than the other samples are. Also, this sample has the highest odour activity value (OAV). Sensory analysis of the wines considered has shown that the feeding containing olive oil and lipase has a positive effect on the aromatic profile of wine: in the aroma, there are distinct floral and fruity notes, more intense than those in the control sample an in the one obtained by ageing the wine material sur lie. This is possible due to a higher concentration of complex esters and a moderate content of higher alcohols. Adding the feeding results in no unpleasant tones in the wine’s odour, which are often caused by fatty acids, as their content is low. The advantages of the method suggested to enhance the aromatic profile of wines are its simple production technology and availability of the natural ingredients of the feeding. This research is supposed to help wine manufacturers satisfy consumers’ demand for local wines with their site-specific character, because one of the main motivations for tourists to visit the world’s wine-producing regions is an opportunity to taste unique wines with a pronounced and attractive floral-fruity aroma
- ДокументINVESTIGATION OF THE TECHNOLOGICAL PROPERTIES OF EMMER FLOUR(2020) A. Zaparenko, S. Didenko, O. Holyk, Y. GoloventsovThe article presents the results of studying the technological properties of emmer flour obtained from the grain of the variety Golikovska, in comparison with commercial patent wheat flour. It has been found that emmer flour contains 1.4 times as much crude gluten and 1.3 times as much dry gluten as wheat flour does. It has been shown that gluten of emmer flour is 1.2 times less strong and 1.3 times more elastic than gluten of wheat flour, and can be included in the 2nd group of quality. According to the results of farinographic tests, it has been established that the experimental emmer dough sample is formed 2 minutes earlier and is 3 times less stable than wheat dough. The results of the alveographic tests have shown that, compared to wheat dough, the tenacity of emmer dough is lower by 25.9%, the extensibility is higher by 26.3%, its alveogram configuration ratio is lower by 36.4%, and its baking strength is lower by 28.2%. It has been established that the starch of emmer flour starts being gelatinised (turning into paste) a little later and at a slightly higher temperature than wheat flour starch does. The maximum viscosity of wheat starch paste is by 58.3% higher than that of emmer starch paste. It has been established that the falling number of emmer flour is by 9.6% smaller in comparison with that of wheat flour. The dough-raising capacity of model yeast dough systems prepared from emmer flour is by 25.0% better than it is in model systems made from wheat flour. It has been found that in emmer yeast dough, fermentation processes are more intensive than in wheat yeast dough: at the end of fermentation, the emmer dough had by 13.3% higher titrated acidity and had formed by 12.5% more carbon dioxide. The volume of emmer dough was by 16.7% higher than that of wheat dough. The sensory evaluation of unleavened and yeasted puff pastries made from emmer flour has shown that they are not inferior in quality to baked products made from wheat flour, have a regular shape and a bright crust colour, and are large in volume.
- ДокументASSESSMENT OF THE QUALITY OF MODERN COMMERCIAL PORK PRODUCTS(2020) K. Garmatyk, R. Susol, M. Broshkov, O. Danchuk, Ih. Panikar, L. SusolBy a morphological study of carcasses of young pig stock of different origin, it has been proved that up-to-date crossbreeding schemes using meat-type breeds as parents increase the percentage of meat in a carcass and optimise the lean-to-fat ratio. Physicochemical analysis of pork obtained from pigs of different breeds has shown that all the parameters investigated are within the current physiological standards. Most parameters have shown no significant difference, though tend to exhibit some peculiarities associated with the effect of a genotype on how this or that physicochemical characteristic manifests itself. The use of the Piétrain breed as the sire line decreases the intramuscular fat content, and hence the calorific value of pork. The back fat of this breed has the highest melting point, which indicates its high storability, but somewhat lower cooking properties than those of similar products obtained from offspring of Large White and Landrace parents. The pH and water-holding capacity of the pork of Piétrain-sired offspring make it quite similar to PSE (Pale, Soft, Exudative) meat: this pork is slightly less tender and paler in colour and exhibits greater weight loss during thermal processing. Also, the result of a comprehensive sensory evaluation of boiled pork and pork broth obtained from Piétrain-sired young stock was the lowest, which is consistent with most of the physicochemical properties of pork from pigs of this genotype. So, it is the 75% purebred Landrace that should be favoured as a terminal sire line in crossbreeding programmes in order to obtain pork and bacon of improved quality in intensive commercial swine production systems. It is recommended to combine Piétrain and Duroc lines to produce terminal sires, ½ (Piétrain + Duroc), that will be further mated with two-breed-cross dams – ½ (Large White + Landrace).
- ДокументNUTRITIONAL PROPERTIES OF CHIA SEEDS AND THEIR SANITARY SAFETY(2020) L. Valevskaya, A. Iegorova, L. Ovsiannykova, O. Sokolovskaya, F. Marchenkov, A. ShulyanskaCurrently, there are more and more requirements not only to the quality of food, but also to the raw materials it is made from. This leads to the search for new, non-traditional products. One of these is chia seeds (Salvia hispanica). The article provides data on their useful properties. The high demand for chia seeds is due to their unique chemical composition. The main feature of the seeds of this crop is that they contain many chemical substances of high calorific and biological value, as compared with cereals and oilseeds traditionally grown in Ukraine. In chia seeds, there are 30–35% of fat, 25–41% of carbohydrates, and 20–22% of protein. Chia seeds are a valuable source of vitamin B, calcium, potassium, iron, zinc, and copper. The fatty acid composition of this crop indicates a high content of polyunsaturated fatty acids. 63.3% of them is linolenic fatty acid, which belongs to ω-3 acids and is important for the brain function, growth, and development of a living organism. That is why it is so important to find optimal ways of preparing freshly harvested chia seeds so as to extend their shelf life. These ways must take into account the biological and chemical characteristics of this crop, and make it possible to preserve its consumer properties for further targeted processing. The article presents the results of studying the quality indicators and microbiological condition of chia seeds to establish how long they can be safely stored and to assess the sanitary safety of this crop. It has been shown that within the period of 6 months, the greatest changes in the quality of chia seed oil are observed at 25°C: there is a significant increase in the acid and peroxide values and a decrease in the iodine value (the latter indicates spoilage of chia seeds). Lowering the air temperature to 5°C slows down the enzymatic processes that take place in chia seeds, and inhibits the increase of the acid and peroxide values of fat, which ensures retention of the consumer properties of seeds. It has been established that the seeds of the crop under study can be stored, without any loss of their quality, for 6 months at 5–15°C and the relative humidity 60–70%. All the beneficial properties of chia seeds are due to their unique composition, so they are supposed to be widely used for specialised and functional nutrition
- ДокументPROSPECTS OF USING GLUCOSE-FRUCTOSE SYRUP IN THE RIBOFLAVIN BIOTECHNOLOGY(2020) V. Polishchuk, O. DuganРибофлавін є важливим вітаміном, що широко застосовується у харчовій промисловості для збагачення харчових продуктів та в якості барвника. Важливою проблемою реалізації біотехнології рибофлавіну є підбір раціональних джерел карбону та нітрогену, що є дешевими та технологічними. Це дасть можливість значно підвищити ефективність даної технології. Відомо, що гриби роду Eremothecium здатні до синтезу ароматичних речовин, дослідження рівня накопичення ефірної олії на запропонованих джерелах карбону та нітрогену дасть можливість створення технології одночасного виробництва рибофлавіну та ефірної олії. Об’єктом дослідження був аскоміцет Eremothecium ashbyi Guillierm. F-340. Досліджували біосинтетичну активність обраного штаму-продуценту рибофлавіну на середовищах з різними джерелами карбону та нітрогену, компонентний склад раціонального поживного середовища для культивування продуценту з метою максимального накопичення рибофлавіну, здатність продуценту до синтезу ароматичних сполук на запропонованому середовищі. Встановлено вплив різних джерел карбону та нітрогену на накопичення біомаси та синтез рибофлавіну штамом E. ashbyi F-340, для максимального накопичення рибофлавіну краще підходять моносахариди (фруктоза, галактоза) та шестиатомний спирт сорбіт. Кращим джерелом нітрогену виявився дріжджовий екстракт. Отримані експериментальні дані свідчать про ефективність застосування глюкозо-фруктозного сиропу з вмістом фруктози від 8 до 12% на суху речовину (ГФС-10). Показано, що саме при використанні ГФС-10 синтезується найбільша кількість вітаміну (140 мг/дм3). Показаний широкий діапазон варіювання кількості синтезованої ефірної олії. Найбільша кількість спостерігається на середовищі, що містить в якості джерела карбону ГФС-10 (273–453 мг/дм3). Використання ГФС-10 дозволило збільшити вихід рибофлавіну у 6,7 рази, порівняно з середовищем з глюкозою, та у 3,7 рази, порівняно з середовищем з фруктозою. Вихід ефірної олії збільшився у 5 раз. Отримані данні є передумовою для оптимізації поживного середовища.
- ДокументOn conformally reducible pseudo-Riemannian spaces(2021) Тетяна Iванiвна Шевченко, Тетяна Сергіївна Спічак, Дмитро Миколайович ДойковThe present paper studies the main type of conformal reducible conformally flat spaces. We prove that these spaces are subprojective spaces of Kagan, while Riemann tensor is defined by a vector defining the conformal mapping. This allows to carry out the complete classification of these spaces. The obtained results can be effectively applied in further research in mechanics, geometry, and general theory of relativity. Under certain conditions the obtained equations describe the state of an ideal fluid and represent quasi-Einstein spaces. Research is carried out locally in tensor shape.
- ДокументSome applications of transversality for infinite dimensional manifolds(2021) Kaveh EftekharinasabWe present some transversality results for a category of Frechet manifolds, the so-called MCk - Frechet manifolds. In this context, we apply the obtained transversality results to construct the degree of nonlinear Fredholm mappings by virtue of which we prove a rank theorem, an invariance of domain theorem and a Bursuk-Ulam type theorem.
- ДокументGalois coverings of one-sided bimodule problems(2021) Vyacheslav Babych, Nataliya GolovashchukApplying geometric methods of 2-dimensional cell complex theory, we construct a Galois covering of a bimodule problem satisfying some structure, triangularity and finiteness conditions in order to describe the objects of finite representation type. Each admitted bimodule problem A is endowed with a quasi multiplicative basis. The main result shows that for a problem from the considered class having some finiteness restrictions and the schurian universal covering A', either A is schurian, or its basic bigraph contains a dotted loop, or it has a standard minimal non-schurian bimodule subproblem.