Том 13 № 1

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https://card-file.ontu.edu.ua/handle/123456789/8338

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COMPARATIVE STUDY OF THE BIOLOGICAL VALUE AND OXIDATIVE STABILITY OF WALNUT AND PUMPKIN-SEED OILS
(2019) T. Nosenko, T. Koroluk, S. Usatuk, G. Vovk, T. Kostinova
The work is devoted to the study of the biologically active components and the oxidation stability of oils made from non-traditional raw materials such as walnuts and pumpkin seeds. The characteristics that have been determined are the content of phospholipids, carotenoids, chlorophylls, tocopherols, and sterols, the composition of fatty acids and tocopherol homologues, the acidity and oxidation stability of walnut and pumpkin-seed oils. Walnut and pumpkin-seed oils contain a significant amount of polyunsaturated fatty acids, in particular, walnut oil contains linolenic acid and has the ratio ω-3:ω-6 of polyunsaturated fatty acids, which is close to the recommended ratio. The linoleic (polyunsaturated, ω-6) and oleic (monounsaturated) fatty acids dominated in the fatty acid composition of pumpkin-seed oil, and the sum of saturated fatty acids was three times as high as that in walnut oil. An important property of walnut oil is a very high ratio of ω-3:ω-6 polyunsaturated fatty acids, 1:5, which is almost what is recommended by dietitians for the human diet. The difference in the total tocopherol content of the two oil samples was slight, but the composition of tocopherol homologues was very distinctive, i. e. β-tocopherol was the main homo;ogue in the walnut oil and α-tocopherol in the pumpkin-seed oil, respectively. The acidity of the oil samples increased quite rapidly, reaching the value close to 4 mg KOH/g of in 63 days for walnut oil, and in 70 days for pumpkin-seed oil. The oxidative stability of the two oil samples was estimated by changes of the peroxide value during 98 days of oil storage. It has been shown that the induction period of walnut oil oxidation, defined as the start of an increase of the peroxide index, was 56 days, in spite of a high content of polyunsaturated fatty acids, particularly, linolenic acid. The duration of the induction period of pumpkin-seed oil oxidation and the shelf life of this oil were 70 and 98 days, respectively, while the shelf life of walnut oil was about 90 days. The higher resistance of pumpkin-seed oil to oxidative damage is primarily due to the fatty acid composition of this oil, namely to a high content of saturated and monounsaturated fatty acids and almost twice as low a content of polyunsaturated fatty acids compared to that of walnut oil. Both oils can be recommended as a valuable source of polyunsaturated fatty acids, antioxidants, and vitamins for human nutrition.
EFFECTS OF FİLTRATİON PROCESS AND STORAGE TİME ON THE CHEMİCAL CHANGES AND SENSORY PROPERTİES OF OLİVE OİL EXTRACTED FROM TURKİSH USLU CULTİVAR
(2019) E. Ghanbari Shendi, D. Sivri Ozay, M.T. Ozkaya, N.F. Ustunel
Upper Mesopotamia is a part of Turkish territory is the homeland of the olive tree with a wide range genetic resource. This is the first report on chemical composition and oxidative stability of olive oil extracted from Uslu cultivar grown locally in a small amount. In this research, a Turkish olive cultivar named as “Uslu” locally grown in Akhisar was used for production of monocultivar extra virgin olive oil by using Mobile Olive Oil Processing Unit”. Olive oil samples were bottled before and after filtration and stored up to 24 months. Some chemical properties such as free fatty acid content, peroxide value, moisture content, UV absorbance value, minor and major components (fatty acid composition, tocopherols, total phenol compounds and phenolic composition), were determined during storage for 24 months. Chemical parameters such as free fatty acid, peroxide value except UV absorption values of both filtered and unfiltered “Uslu” olive oil samples were in agreement with the trade standards of International Olive Council (IOC). Color values of EVOO changed from green to yellow while UV absorbance values altered during storage. Very low free fatty acidy (0.2%) values which are unusual for commercial olive oils in Turkey were obtained for filtered and unfiltered samples. A slight increase was seen for unfiltered sample at the end of storage. Filtration had no detectable effect on fatty acid profile. Filtered sample had higher total phenols (407.64±4.051 ppm) and α-tocopherol (237 and 123.31 ppm) contents than unfiltered ones and their contents decreased approximately 50% at the end of storage. Luteolin was the most abundant phenolic compound and its concentration decreased from 268.65±5.428 to 93.57±0.541ppm during storage. It seemed effect of filtration was more obvious on total phenolic contents. This study was good practice for producing premium extra virgin olive oil by using Mobile Olive Oil Processing Unit. The results obtained in this study showed that Uslu olive oils has a unique chemical composition and a good oxidative stability with high tocopherols and phenolics contents that are uncommon in most of the commercial olive oils.
EFFICIENCY OF USING THE ANIMAL PROTEIN COMPLEX IN THE TECHNOLOGY OF COOKED SAUSAGE
(2019) L. Peshuk, O. Gorbach, O. Galenko, L. Vovk
The research is dedicated to the development of recipes of cooked sausages and their diversification through including in the recipes poultry meat, and by-products of processing meat and milk. The meat products most affordable and popular with the Ukrainian people are selected for the study: cooked sausages and poultry meat wieners. The main components of the recipes are: red poultry meat, mechanically deboned poultry meat, medium-fat pork. In the recipes of the products developed, 10 % of the basic raw material was replaced with a hydrated protein-carbohydrate-mineral supplement. According to its physico-chemical characteristics, the protein-carbohydrate-mineral supplement in the technology of cooked sausage products allows us to get ready-made products with excellent quality parameters. It has been established that adding protein-carbohydrate-mineral supplement to the formulation significantly effects on the physico-chemical, functional, and technological parameters and biological value of meat products. The experimental data obtained show that the moisture content of the fresh stuffing for the sausages Kuryacha and the wieners Videnski is by 0.9 and 1.7%, respectively, higher than that in the control samples. The water-binding power in the fresh stuffing of the control samples is by 5% lower than in the test samples. In the finished product, the moisture-holding capacity is higher in the test samples (by 5.9% in the sausages Kuryacha, by 3.8% in the wieners Videnski). The study has shown that the amino acid score difference coefficient (AASDC) in the control sample of cooked sausage was by 11.2% higher than in the sample of the cooked sausage Kuryacha. In the control sausages, it was 13.0% higher than in the Videnski wieners. The developed cooked sausage products with the protein-carbohydrate-mineral supplement can be introduced into production as functional products with improved biological value.
FEATURES OF GRAIN GERMINATION WITH THE USE OF AQUEOUS SOLUTIONS OF FRUIT ACIDS
(2019) O. Pivovarov, O. Kovaliova
The paper describes some aspects of producing germinated cereal grain with the use of fruits acids of various concentrations. The technological process of grain germination (including washing grain, disinfection, hydration by alternate steeping and air resting, germination, and drying) has been analysed and studied. To intensify germination and disinfection of grain of various crops at the steeping stage, aqueous solutions of organic acids (citric acid, malic acid, and inactive tartaric acid) were used. The results of studying the effect of these organic acids on the energy and germination ability of grain, the flouriness of malt grain, the amino acid composition of malt, the microbiological status of grain have been presented. For each grain crop, concentrations have been determined of active substances in the solutions that activate germination and reduce the time of malt production. A higher flouriness of malt grain, being an important brewing parameter, has been shown. The effect of the considered growth stimulants on the amino acid composition of the finished product has been studied. An increase in the amino acids content indicates splitting the grain endosperm more deeply and obtaining a biologically valuable food product rich in essential amino acids. While studying the microbiological status of grain with the use of the said organic acids, their disinfecting ability towards the pathogenic microflora of the grain was observed. It has been found that the suggested method of intensifying grain germination allows obtaining eco-friendly products in a shorter time, namely, 3–6 days depending on the grain crop. It has been established that, compared to the classical technology, using fruit acids as growth stimulants allows obtaining malt of higher quality, rich in biologically active substances. These grain raw materials can be used both to brew beer and to make highly nutritious healthy food.
INVESTIGATION OF THE FAT FRACTION ENZYMATIC HYDROLYSIS OF THE WASTE FROM PRODUCTION OF HYDROGENATED FAT BY THE LIPASE RHIZOPUS JAPONICUS
(2019) V. Skliar, G. Krusir, V. Zakharchuk, I. Kovalenko, T. Shpyrko
. In the article the conditions of enzymatic hydrolysis of fat fraction of waste from production of hydrogenated fat by the lipase Rhizopus japonicus are considered, namely, the influence of pH of the medium (pH-optimum, pH-stability) and temperature (thermal optimum, thermal stability). The scope of applications of lipases in various branches of the national economy, including for utilization of numerous fatty waste and by-products of oil and fat industry, is disclosed. The main reasons of biotechnological potential of microbial lipases are considered. Objects of research were the lipase Rhizopus japonicus and waste from the demetallization stage of the hydrogenated fat production. Detected, that the optimum pH value for Rhizopus japonicus lipase is 7.0, reducing the pH of the medium from the optimum to pH 6.0 is accompanied by a decrease in activity by 30%, and an increase from 7.0 to 9.0 – decrease by 20%. The maximum activity of the enzyme is observed in the region of physiological values of the temperature. It has been established that the lipase optimal temperature is 40°C. The results of the Rhizopus japonicus lipase stability study showed that incubation of the enzyme at pH 2.5 resulted in a complete loss of lipolytic activity after 30 minutes, and at alkaline pH, the enzyme was more stable. Incubation of lipase Rhizopus japonicus for 30 min at pH 9.0 leads to loss of lipolytic activity by 25% of the maximum, and total loss of activity occurs after 2.5 h. The study of pH-stability of Rhizopus japonicus lipase at an optimal pH of 7 showed that after 60 min of incubation, the enzyme lost 15% of the lipolitical activity, and after 60 min – 50%. Complete loss of Rhizopus japonicus lipase activity at pH 7.0 takes place after 150 minutes of incubation. The results of the study of thermal stability of lipase showed that at a temperature of 40°C and 60°C, the lipase activity remained rather stable for 50 minutes and completely lost after 150 minutes of incubation. At 80°C and 100°C, lipase activity was lost after 40 minutes and 50 minutes of incubation, respectively. The results of the study indicate the prospect of enzymatic hydrolysis of fat fraction of waste by Rhizopus japonicus lipase. The results obtained should be used to improve the processing technology of waste oil and fat industry food and processing industries.
MICROBIOTA OF INSTANT CEREALS AND ITS CHANGE DURING STORAGE
(2019) M. Mardar, M. Stateva, А. Yegorova, G. Evdokimova, I. Ustenko, S. Masanski
The paper presents the results of the study of changes in the microbiological parameters of instant cereals for military personnel during storage. The purpose of the microbiological studies of instant cereals was assessing whether the products were safe for human health immediately after manufacturing and during their further storage at a certain temperature and in various packaging. Special attention was paid to detecting certain microorganisms: pathogenic (including Salmonella), opportunistic pathogenic, sanitary indicator microorganisms (coliform bacteria), some microbial spoilage agents (yeast and mould fungi). Various types of packaging materials having been analysed, it has been studied how flexible packaging, foil-sealed plastic cups, and metallised packages of biaxially oriented propylene film (BOPF), GM-200, change the consumer properties of new instant cereals during storage. The studies have helped establish that natural enriching supplements of plant and animal origin in the composition of new instant cereals prolong the storage of finished products. It has been established that enriching supplements prevent the development of microbiota due to a bactericidal effect of supplements on microorganisms. Studying how packaging changes the consumer properties of new instant cereals during storage has shown that bacteria decreased in number in all samples during storage, regardless of the type of packaging. However, the most significant decrease (by an average of 1.5 times) was observed when metallised BOPF bags were used. Based on the experimental studies, it has been found that instant cereals packed in metallised BOPF bags belong to long-term storage products and can be stored for 12 months at room temperature and the relative humidity 60–75%.
NEW ASPECTS OF USING MILLET GRAIN IN BREAD MANUFACTURING
(2019) L. Ovsiannykova, L. Valevskaya, V. Yurkovska, S. Orlova, O. Sokolovskaya
The article proves how practical it is to use whole-milled millet grain to improve the quality of bakery products. Samples of bread with the addition of different amounts of milled millet grain before and after microwave treatment have been evaluated by sensory (surface, shape, and colour of bread, porosity, structure and colour of the crumb) and physico-chemical parameters. To determine the organoleptic evaluation of bread samples with the addition of 5%, 10%, and 15% whole-milled millet grain before and after microwave treatment, a scoring scale and the profiling method were used. According to the results of the research, the advantages of introducing milled millet grain into wheat flour has been substantiated, and it has been shown that adding it to the formulation of 5–15% improves the organoleptic characteristics of the bread, namely, giving it a harmonious taste and aroma, an attractive colour, a pronounced smell, and a porous structure, comparatively with standard bread made from wheat flour. The best characteristics were observed after whole-milled millet grain that had undergone microwave treatment was added to the flour. When 15% of whole-milled millet grain is added to wheat flour after microwave treatment, there is a slight decrease in the porosity of the bread. So, the introduction of more than 15% of whole-milled millet into the formulation is considered inappropriate. It has been found that the physical-chemical parameters of bread (humidity, acidity, porosity, mass fraction of sugar and fat), when adding whole-milled millet in the amount of 5–15% before and after microwave treatment, practically do not change. The introduction of 5–15% of whole-milled millet grain into the composition of bread recipes allows you to obtain high quality bread, of high nutritional and biological value, which can be recommended for consumption by all social groups, including children, adolescents, and elderly people. These studies can be used in the future in developing a technology of obtaining bakery products of functional purpose with high consumer properties.
OPTIMIZATION OF EXTRACTION PARAMETERS FOR FUCOXANTHIN, GALLIC ACID AND RUTIN FROM NITZSCHIA THERMALIS
(2019) Vasfiye Hazal Özyur, Ayşegül Erdoğan, Zeliha Zeliha Demirel, Meltem Conk Dalay, Semih Ötleş
Recently, microalgae have become important in their health, and cosmetic applications since they are viewed as new sources of carotenoids. Fucoxanthin is also a type of carotenoid. The anti-diabetic, anti-obesity, anti-cancer, and antioxidant properties of fucoxanthin have been widely reported. Since these valuable properties, they also represent a valuable resource of nutraceuticals for functional food applications. This study aims to determine the amount of fucoxanthin, gallic acid, and rutin in Nitzschia thermalis obtained from the Ege University Microalgae Culture Collection. The extraction parameters have been optimized using response surface methodology. The extraction temperature (25, 35, and 45°C), the extraction time (10, 20, and 30 min) and the biomass/solvent ratio (0.005, 0.001, and 0.015 g ml-1) have been assessed as response variables in the Box – Behnken design. The amount of fucoxanthin was determined by the C30 column at 450 nm, while both the amount of gallic acid and rutin were separated in the C18 column at 275 nm by HPLC-DAD. In the present study, the optimum extraction conditions providing the maximum amount of fucoxantin, gallic acid, and rutin were selected by applying the “desirability” function approach in response surface methodology. Finally, the temperature has been determined to be 27.30°C, the extraction time 10 minutes, and the biomass ratio 0.05 g ml-1. Under these conditions, the optimum fucoxanthin level has been determined as 5.8702 mg g-1, the gallic acid level as 0.0140 mg g-1, and the rutin level as 0.0496 mg g-1. The findings are in good agreement with international published values for fucoxanthin content. In addition, response surface methodology was shown to be an effective technique for optimising extraction conditions for maximum fucoxanthin yield. In conclusion, these findings may be applied in the development of extraction methodologies for value added microalgea products as well as can serve as a reference for the extraction of fucoxanthin having high gallic acid and rutin from other brown microalgae, and therefore it could potentially be applied in both pharmaceutical and food industries.
OXIDATIVE STABILITY OF MAYONNAISE SUPPLEMENTED WITH ESSENTIAL OIL OF ACHILLEA MILLEFOLIUM SSP MILLEFOLIUM DURING STORAGE
(2019) Asiye Ahmadi-Dastgerdi, Hamid Ezzatpanah, Sedighe Asgary, Shahram Dokhani, Ebrahim Rahimi, Majid Gholami-Ahangaran
Lipid oxidation is the main chemical process affecting mayonnaise deterioration. Today, essential oils from aromatic plants have been qualified as natural antioxidants and proposed as potential substitutes of synthetic antioxidants in food products. In this research, antioxidant activity of Achillea millefolium essential oil was determined based on oxidative stability of treated mayonnaise (homogenized) during 6 months of storage at 4°C. The following analysis were performed: peroxide value (PV), anisidine value (AV), Totox value and thiobarbituric acid (TBA) to assess the extent of oil deterioration. Mayonnaise samples were divided into three experimental treatments, namely: E.O (essential oil in concentrations: 3.83, 5.85 and 7.2 mg/ml), T (TBHQ in concentration: 0.12 mg/ml) and C (control: no antioxidant). Subsequently, the samples from each treatment were stored at 4 oC. The results showed that the treatments containing essential oil and TBHQ significantly reduced the oxidation (p < 0.05), while the control sample was oxidized faster. Among the essential oils, concentrations of 5.85 and 7.2 mg/ml showed the best antioxidant activity. PV, TBA, AV and totox values increased during the storage time for all treatments. Our results suggest that essential oil of Achillea millefolium has potential source of natural antioxidant for the application in food industries to prevent lipid oxidation particularly lipid-containing foods such as mayonnaise, due to its reaction with oxidative free radicals and therefore can increase food shelf life.
PROSPECTS OF USING BY-PRODUCTS OF SUNFLOWER OIL PRODUCTION IN COMPOUND FEED INDUSTRY
(2019) B. Yegorov, Т. Turpurova, E. Sharabaeva, Y. Bondar
The article considers the possibility of obtaining a protein-rich feed additive from by-products of sunflower oil production. From literary sources it is known that in the global food market, Ukraine ranks first in cultivating the sunflower and in production and export of sunflower oil. Correspondingly, there are more by-products, such as press cakes and oil meal, which are high-protein feeds for farm animals. Recently, oil press factories have been producing high fat press cakes for farm animals and poultry’s energy needs. The shelf-life of high fat press cakes is very short, and besides, their physical properties are poor. So, it has been suggested to produce a protein-rich feed additive based on sunflower oil meal, sunflower press cake and limestone flour. The quality parameters of sunflower seeds and by-products of their processing have been determined. Five samples of the additive with different ratios of sunflower oil meal, sunflower press cakes, and limestone flour have been studied. The coefficient of variation characterizing the even distribution of the components in the additive has been determined. Besides the distribution of limestone flour in the additive, the distribution of sunflower press cake matter has been investigated, because it contains a lot of fat and has poor physical properties. The determination of the coefficients of variation by the distribution of limestone flour and by the distribution of sunflower press cake matter has shown that the mixing is the most effective when the recipe includes 75% of sunflower oil meal, 10 % of sunflower press cake, and 15% of limestone flour. A protein-rich feed additive based on by-products of the sunflower oil production has been developed. The additive can be used to feed animals and poultry.
RESEARCH OF THE PROPERTIES OF GRAPE PROCESSING PRODUCTS IN RELATION TO ITS APPLICATION IN SPA AND WELLNESS INDUSTRIES
(2019) G. Sarkisian
The work analyzes the global experience of using wines and grape-processing products to support a person’sphysical, mental, and psychological health, to slow down aging, to prevent and treat many diseases, in particular cardiovascular andoncological ones, endocrine system disorders, etc. It has been shown that a great deal of waste, including marc, is obtained whileprocessing grapes and producing wine. The fact has been pointed out that in Ukraine, the technologies of using wine-making waste infood and cosmetic industries and in medicine are being developed and introduced but slowly, though the level of viticulture is high.The importance and prospects of finding ways to process grape marc have been proved, as its valuable chemical composition allowsobtaining dietary supplements and oenotherapeutic products for spa and wellness industry. The following rational parameters havebeen suggested to extract the most valuable biologically active substances (polyphenols) from grape marc: microwave extraction;specific power of the microwave installation 1.6–1.7 kW/kg; 40% ethyl alcohol as the extractant; proportion of water(hydromodulus) 1:5; extraction temperature 60–65°C; 4 heating stages; stage interval 1.5–2 minutes; total extraction time 12–14minutes. The physico-chemical parameters of the marc extracts obtained from the grapes harvested in 2016 and 2017 have beendetermined. It has been established that, besides polyphenols, a whole complex of biologically active substances is extracted. It hasbeen shown that grape marc can be used to produce dietary fibre, pectins, and other valuable substances. The medical and biologicalproperties of the polyphenolic complex obtained from marc (the Odesky Chorny variety of grapes) have been studied on laboratoryrats to determine its antioxidant activity and the prospects of its use in treating type 2 diabetes. The protective properties of theobtained product have been proved. Such processes have been established to take place as the mobilization of the antioxidant systemof cells, the normalization of the enzyme activity of the antioxidant protection system, and a decrease in the level of markers ofoxidative modification of proteins and lipids (that are higher than normal with diabetes mellitus). It has been suggested to usepolyphenolic complex extracts in oenotherapy as a skin and face care product with protective properties.
STUDY OF THE FOAMING PROPERTIES OF GELATIN WITH SOLUBILIZED SUBSTANCES FOR THE PRODUCTION OF MARSHMALLOWS
(2019) І. Piliugina, M. Artamonova, N. Murlykina, О. Shidakova-Kamenyuka
The article presents the results of studying the foaming properties of gelatin with solubilized substances by Rauch’s method. To improve the nutritional value of gelatin, deodorized refined sunflower oil with β-carotene was used. It has been proved that gelatin with solubilized substances can be used in the marshmallow technology with natural colourants obtained from the roselle (Hibiscus sabdariffa) and the black chokeberry. It has been established that a gelatin solution with solubilized substances has the greatest foaming ability and maximum foam stability at the rotation frequency 30–80 s-1 and a temperature below 45°C, with pH=3–7 within (6–8)×60 s. It has been found that aqueous extracts of natural colourants of anthocyanin origin - cryopowders obtained from the roselle and the black chokeberry - reduce the maximum foaming time to 3×60 s, as compared to water. The maximum foam stability was observed after (3–4)×60 s and was 70 and 60%, respectively, which exceeded this value of the control sample by 20–30%. The foam stability remained unchanged for (2-5)×60 s due to the presence of phenolic compounds in the extracts. 40% aqueous-alcoholic extracts of cryopowders of the roselle and the black chokeberry should be introduced after whipping the gelatin solution, since in this case, foam breaking is minimum. The foam stability increases from 60–75 to 94–99% after the introduction of 20–60% of sugar. It has been established that the use of gelatin with solubilized substances in the marshmallow technology with natural colourants from the roselle and black chokeberry makes it possible to obtain products with a density of 510–670 kg/m3 and ensure the compliance of this quality parameter with the requirements of the current regulatory documentation.
SYNBIOTIC ADDITIVES IN THE WAFFLES TECHNOLOGY
(2019) E. I Orgachev, H. Korkach, T. Lebedenko, O. Kotuzaki
The problems considered in the paper are the incidence of dysbiosis in the Ukrainian people, the reasons for it, and the methods of improving the diet of those suffering from microfloral disorders. Useful properties and effects of the microorganisms Bifidobacterium and Lactobacillus, and of inulin and lactulose have been studied as well as the ways in which they help to restore a person’s normobiocoenosis. After a research in vitro, with the conditions imitating the human gastrointestinal tract, the survival rate of encapsulated cells of bifidobacteria and lactobacilli in an unfavourable environment has been determined. It has been grounded how necessary microencapsulated forms of microorganisms are in the production of confectionery – firstly, to ‘protect’ them against physiological and technological factors, and secondly, to help them reach the lower regions of the small intestine where their capsules are destroyed and the bacteria are released. The reasons have been given why fatty filling for waffles, as an object to be enriched with useful ingredients, should be preferred when developing healthy and wholesome confectionery. It has been shown how promising probiotics and prebiotics are if used in confectionery technology. The two synbiotic complexes SC 1 and SC 2 have been developed, and such parameters have been determined as the optimum weight fractions of inulin and lactulose in the formulation of the filling, and the number of probiotic microorganisms. It has been established that lactulose can reduce sugar in the formulation of the filling, and using inulin results in replacement of an equivalent amount of fat. To prove how practical it is to add synbiotics to waffles, and to determine the product’s consumer appeal, a tasting assessment of the new types of waffle products has been made. It has been proved that adding synbiotic complexes to the formulations of waffles will result in the consistent high quality of the products, and in their better sensory characteristics. Besides, it can contribute to making the people of Ukraine healthier and fitter for work.
THE INFLUENCE OF TANNIN PREPARATIONS ON THE CONTENT AND FORM OF ANTHOCYANINS OF MODEL WINE SYSTEMS IN THE CONDITIONS OF INDUCED OXIDATION
(2019) М. Bilko, М. Ishchenko, О. Tsyhankova, Т. Yakovenko, Т. Кyrpel
The article considers how oenological tannins effect on the content of anthocyanins, phenolic substances, and their forms that influence the stability of the colour of rosé and red wines. The research material was wine model systems that underwent induced oxidation for a week at a temperature of 45±5 °C with limited access of air. Tannins of different botanical origin were used in the study: hydrolyzable ones – Oaktan FU (oak wood), Tannal W4 (Tara pods), CW Tannal (chestnut wood), and Tannal W2 (gallnuts); and condensed ones – Tannin WG (grape stones), Taniraisin (grape skin), Tannal QW (quebracho wood). The source of anthocyanins was an alcohol extract from the skins of European red grapes. It was obtained by 24 hours long extraction with ethyl alcohol, and with the addition of hydrochloric acid (0.01%). It has been determined that in the course of induced oxidation, the content of phenolic compounds tends to decrease in a wavelike manner in all samples. The anthocyanin content reduces intensively and becomes practically twice as low on the first day of oxidation. The total amount of phenolic compounds becomes 2 to 6 times lower depending on the variant of the experiment. It has been established that condensed tannins of grape origin contribute to the preservation of the total content of phenolic substances (including anthocyanins) in wine, unlike hydrolyzable tannins obtained from other plants. But their application leads to polymerization of anthocyanins, which will result in the appearance of yellow-brown pigments in the red colour of wine. Hydrolyzable tannins obtained from gallnuts and tara trees preserve the red colour of wine for a long time, unlike condensed tannins, due to their antioxidant capacity. Hydrolyzable tannins obtained from tara and quebracho trees will help obtain wine with rich red shades.
THE SWEET ICES FOR PREGNANT WOMEN
(2019) J. Kozonova, L. Telegenko, A. Salavelis
Daily food consumption norms of an average woman and a pregnant woman have been analysed. It has been established that in a pregnant woman’s diet, it is necessary to increase the content of proteins, fibre, vitamins C, E, D, PP, and B, and reduce fats, carbohydrates (easily digestible), vitamins B5 and H, sodium, magnesium, salts, and water. Taking into account the above-mentioned requirements, eight recipe compositions of sweet ices based on plant raw materials have been suggested. The recipes were selected by linear programming using MS Excel. The products have a low calorific content (26–137 kcal per 80 g), and an increased nutritional value (due to vitamin C, carotene, etc.). For the first time, cereals, various types of seeds, nuts, have been put into the recipe of sweet ices, as well as raw materials, which eliminate physiological complications during pregnancy. The products developed differ in their composition and are made without sugar. However, some recipes include small quantities of honey as it is highly palatable. The chemical composition of the new sweet products has been studied and analysed in details and sugar/acid indices have been calculated. The developed ices have a slightly acidic taste or no acidity at all, which corresponds to the values of sugar/acid indices 13.4–26.6, while the sample from the store, selected for comparison, contains a large amount of sugars, as evidenced by the cloying taste and high sugar/acid index (more than 30). The source of fatty acids in sweet ice for pregnant women Joy is almond nuts. The results of the chromatographic study have shown that this product as for the quantitative fatty acid composition, meets the current requirements. We recommend introducing the sweet ice manufacture technology on the equipment already in use in canneries. The products are formed (poured into moulds where wooden sticks are then inserted) in a Hassia machine. One of the main operations, freezing, is done in a quick freezer GyroFreze. We also recommend manufacturing sweet ices using existing restaurant equipment.
USE OF DRIED CARROT POMACE IN THE TECHNOLOGY OF WHEAT BREAD FOR ELDERLY PEOPLE
(2019) A. Hryshchenko, O. Bilyk, Yu. Bondarenko, V. Kovbasa, V. Drobot
The paper considers the technological properties of dried carrot pomace obtained in the technology of organic direct pressing juices. Its use as a valuable source of food fibre and β-carotene in bread technology for elderly people has been substantiated. It has been established that dried carrot pomace has a larger particle size than flour, and its water absorption capacity is higher by 65%. A 5–15% dose of pomace makes the formation of dough longer by 1.5–6.5 min, significantly increases its viscosity and stability, as well as acidity. Due to the content of sugars available for yeast fermentation, the pomace contributes to the intensification of gas formation. The amount of wet gluten in pomace-containing dough decreases, as well as its water absorption capacity, and its resilience increases. This affects the structural and mechanical properties of dough, which has a decisive effect on the porous structure of finished products and their specific volume. A high quality of bread is achieved when the dose of dried carrot pomace is up to 5%, which helps to improve the colour and the taste. With an increasing dose, the specific volume and porosity of the products decrease. It has been proved that, due to the content of pectin and high hydrophilic properties, carrot pomace slows down the process of staling of bakery products. Calculations have shown that with the addition of 5% of the pomace, the content of β‑carotene in 100 g of bread increases by 15 times, and the fibre content by 3.4 times. With the consumption of 277 g of such bread, elderly people’s daily requirement of β-carotene is satisfied by 100.8%, and the that of dietary fibre by 4.1%.

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