News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology最新文献

{"title":"PHYTONCIDES IN THE COMPOSITION OF COMMON BIRD CHERRY","authors":"P. Naguman, A. Zhorabek, A. Amanzholova, I. Kulakov, A.N. Rakhimbaeva","doi":"10.32014/2021.2518-1491.53","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.53","url":null,"abstract":"Everyone knows that forest air is very good for health, and one of the most important reasons for this is the presence of phytoncides in it, which kill or suppress pathogens and have a healing effect. Also, phytoncides are one of the factors of the natural immunity of plants (plants sterilize themselves with the products of their vital activity). Their large number is allocated by plants. One of them is the common bird cherry. Cherry-a representative of the genus of plums of the Rosaceae family. The view includes low trees and shrubs. Cheremukha-forest orderly. Its flowers and leaves are rich in phytoncides, thanks to which they exude an alluring aroma. However, when they break down, they release prussic acid, which is dangerous for all living things. This gave them the opportunity to attract and destroy pests. Phytoncides are volatile biologically active substances formed by plants that kill or inhibit the growth and development of bacteria, microscopic fungi, and protozoa. In addition to all of the above, bird cherry has exceptional properties. The strong, somewhat intoxicating scent of flowers and leaves cleanses the air of germs. Antimicrobial properties of phytoncides have led to a large number of studies on their use in medicine, veterinary medicine, plant protection, storage of fruit and vegetable products, in the food industry and other areas of practice. Almost all parts of the plant have bactericidal, fungicidal and insecticidal properties. In folk medicine, bird cherry has long been used as an astringent, fixing, anti-inflammatory and anti-scurvy agent. Bird cherry produces the most powerful phytoncides containing prussic acid. Protozoa die under the influence of bird cherry phytoncides in 5 minutes. On the basis of numerous studies, the time of death of protozoa after noncontact exposure to phytoncidal plants has been established. Especially a lot of phytoncides are released by young leaves in spring and summer, in autumn phytoncides are released much less. The presence of tannins and essential oil in the fruit has an anti-inflammatory effect, which is used to treat inflammatory processes in the gastrointestinal tract and dysentery. The infusion of cherry fruits has a destructive effect on microorganisms. Preparations of the fruits of the common cherry have an antiseptic effect. They are used in dental practice in the treatment of inflammatory processes of the oral mucosa, paradontosis, toothache and hypovitaminosis.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47973494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OXIDATIVE DIMERIZATION OF METHANE TO C2 HYDROCARBONS","authors":"D.B. Augaliev, M. Erkibaeva, A. Aidarova, S. Tungatarova, T. Baizhumanova","doi":"10.32014/2021.2518-1491.44","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.44","url":null,"abstract":"The world's oil reserves are decreasing every day due to the continuous production and processing of the most modern technologies. Scientists all over the world are looking for various raw materials and methods to use the vast resources of natural gas as a substitute for petrochemicals. In this regard, great attention is drawn to natural gas as an alternative source of raw materials for petrochemical industries. The purpose of this work is to study the reaction of methane dehydrogenation on new 20%La-10%Ce20%Mg-50% glycine catalysts prepared by the SHS method to identify the optimal conditions for their preparation, concentration and ratio of metals, the influence of contact time and process temperature on the direction and mechanism of the reaction. The results of the study of 20% La-10% Ce-20% Mg-50% glycine catalyst prepared by the SHS method in the process of oxidative dehydrogenation of methane into C2 hydrocarbons are presented. On the basis of experimental studies, it was found that the composition of the catalyst exhibits high activity in the above reaction under the found optimal conditions. Thus, the influence of reaction temperature on the developed composition of catalysts for oxidative conversion of methane has been determined that the optimum temperature for the selective formation of ethane and ethylene is T=700o С. It was found that for selective oxidation of a mixture of CH4: O2 : Ar in C2 hydrocarbons the optimal conditions are: T=700o С, CH4:O2=2,5:1, 5000 h-1.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46916640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SYNTHESIS OF CARBON NANOFIBERS BASED ON HUMIC ACID AND POLYACRYONITRILE BY ELECTROSPINNING METHOD","authors":"B. Yermagambet, M. Kazankapova, A. Nauryzbayeva, Z. Kassenova","doi":"10.32014/2021.2518-1491.59","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.59","url":null,"abstract":"The article describes a method for obtaining carbon nanofibers (CNFs) based on humic acid from oxidized coal of the Maikuben basin and polycarlonitrile (PAN) by electrospinning in laboratory conditions. The value of the interelectrode voltage was 20-25 kV. The elemental composition was determined and the surface morphology of the studied sample was studied, the type of modification of the carbon fiber was revealed. As a result of energy dispersive X-ray spectroscopy and scanning electron microscopy (SEM), the chemical composition of the initial CNF (C-48.73%) and the diameter of carbon fibers, which ranged from 148.6 nm to 1.36 μm, were found. The processes of oxidation and carbonization of the obtained samples were also carried out. The elemental composition of carbon after oxidation and carbonization was 87.75 and 89.16%, respectively, the diameter of the fibers was 117.5 nm -1.03 microns. The results of Raman scattering of light (RS) of carbonized CNF showed the degree of graphitization - 23.97%, the ratio I (D) / I (G) = 0.7, I (G) / I (D) = 1.4. The resistance of this material was 27 ohms. On the basis of SEM patterns of CNFs based on humic acid and PAN, it was found that the structure of the sample after oxidation and carbonization retains the original fibrous structure. It was also found that the diameter of nanofibers decreases from 1 μm to 117.5 nm, which may be associated with the release of volatile and heterogeneous components of the original product and the formation of a more structural thin porous filament.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44074780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PRODUCTION OF COLD BLACK TEA WITH NATURAL SUGAR SUBSTITUTE-STEVIA [STEVIA REBAUDIANA BERTONI (L.)]","authors":"G. Baigazieva, N. Issayeva","doi":"10.32014/2021.2518-1491.46","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.46","url":null,"abstract":"","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46020824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEVELOPMENT OF EFFECTIVE CATALYSTS FOR PROCESSING C3-C4 HYDROCARBONS","authors":"S. Rasulov, G. Mustafayeva","doi":"10.32014/2021.2518-1491.56","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.56","url":null,"abstract":"The aim of the article is to study the effect of preparation and activation methods of a modified zeolite-containing catalyst on the activity and stability of catalytic properties displayed by it during the conversion of C3-C4 hydrocarbons. During the experiment, the industrial cracking catalyst OMNIKAT, which is a zeolite in the sodium form, was used as the initial one. Zinc, gallium, and REE (rare earth elements) were sequentially applied to decationized samples of this catalyst by ion exchange, impregnation, and dry mechanical mixing, and the effect of these methods on the catalytic properties of the zeolite-containing catalyst was observed. As a result of a comparative analysis of the regularities of aromatization of C3-C4 hydrocarbons, it was found that the mechanical mixing method is the most preferable, since it provides the best process performance. In order to improve the activity and stability of the catalysts, thermocouple and thermal activations were carried out during the preparation process. Further, differences were revealed for the thermocouple and thermal activation of the modified catalyst and their effect on the activity and selectivity of the zinc-galliumzeolite-containing catalyst with respect to ArH (aromatic hydrocarbons) in the process of conversion of C3-C4 hydrocarbons. The choice of these particular operations was dictated by the fact that preliminary thermal and thermal vapor treatment of the catalyst practically does not require significant capital expenditures, i.e., economically most acceptable. Regularities of reaction-regeneration cycles were established. Thus, the optimal technological parameters for the regeneration of catalytic compositions are: temperature - 600°C, atmospheric pressure, oxidizer - air feed rate - 2 h-1, which lead to the restoration of the activity and selectivity of the spent catalyst to the fresh level. Studies of the of oxidative regeneration process a zinc-gallium-zeolite-containing catalyst have shown that while maintaining a clearly regulated regeneration regime, the activity of the latter is restored. The main task of the research was the development of effective catalysts for the conversion of C3- C4 hydrocarbons. Therefore, in the first place, we compared the conversion rates and selectivity for ArH. The proposed catalyst is characterized by good operational properties (high activity and long service life), providing 59.2% by weight of the target product yield at 98.8% conversion of C3-C4 hydrocarbons.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48552150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SELECTION OF THE MASHING MODE IN THE PREPARATION OF BEER WORT BY USING THE WHEAT MALT","authors":"A. Tyan, M. Bayazitova","doi":"10.32014/2021.2518-1491.57","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.57","url":null,"abstract":"In recent years, according to the sharp increase in the number of breweries and high competition on the consumer market, it is very important to extend the raw material base of the industry and the range of produced beer from the recommended raw materials. One of the ways to expand the raw material base of breweries is developing recommendations for the use of new zoned varieties of barley, in particular as well as the use of special malts, wheat malt, the development of new recipes and technologies for beer producing. As it is known, barley, wheat, rye, and malt produced from these cereal crops are processed to a greater extent at present. Along with traditional types of cereals, such cereals as amaranth, buckwheat, triticale, sorghum, oats, etc. are used. Among the listed alternative crops, wheat should be noted as the most promising type of cereal raw materials. Wheat (Triticum) is an herbaceous annual plant of the cereal family. Hard wheat (T. durum) and soft wheat (T. aestivum) are the most important. Both species are holo-grain, i.e., the grain is covered with fruiting and seed shells, fused and consisting of several layers of cells, and do not have flower (chaff) shells. At present time, high-yielding winter and spring wheat (T.aestivum) is mainly cultivated. This species has loose floury grains and rather low protein content. It should be noted that unmalted wheat is rarely used in brewing. This is because that the use of this cereal as unmalted material leads to significant deviations in the technological process, in particular, the filtration of wort and beer slows down, reduces the colloidal stability of the final product. At the same time, as a raw material for malt, wheat has some advantages over barley. The article deals with the effect of different amounts of wheat malt on the mashing process, the percentage of mashing and mashing modes of barley and wheat malt are selected experimentally.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42135547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DISSOLUTION OF STAINLESS STEEL IN SODIUM CHLORIDE SOLUTION AT POLARIZATION BY NON-STATIONARY CURRENT","authors":"R. Nurdillayeva, Zh.G. Sauirbay, A. Bayeshov","doi":"10.32014/2021.2518-1491.54","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.54","url":null,"abstract":"Stainless steel is in great demand due to its mechanical strength, heat resistance, and resistance to corrosive environments. This article presents the result of a study of the electrochemical dissolution behavior of a stainless steel electrode (12X18H10T) at polarization by 50 Hz alternating current in a neutral medium (NaCl). Preliminary experiments have shown that the main processes do not take place when two stainless steel electrodes are polarized with an alternating current. It was observed that by the polarization of the “stainless steel – titanium” pair electrodes with alternating current, the alloy is intensively dissolved with the formation of iron (II) and chromium (III) ions. This is due to the \"valve\" properties of the oxide layer formed on the surface of the titanium electrode. A change in the value of the current density of the titanium and steel electrodes significantly affects the process of electrochemical dissolution of the alloy. At high current densities, the dissolution rate of the alloy decreases due to the deterioration of the current correcting properties of titanium. With an increase in the electrolyte concentration, the current efficiency is reduced as salt passivation occurs. A maximum value of the current efficiency of dissolution of stainless steel was observed at a current frequency of 50 Hz. High frequencies of the alternating current do not provide an adjustable duration of the anodic half-cycle for the oxidation reaction due to the frequent change of halfcycles of the alternating current. It was observed that increasing the temperature of the electrolyte reduces the current efficiency of the electrochemical dissolution of stainless steel electrodes. The effects of main electrochemical parameters on the electrolysis process have been investigated, and the optimal conditions of the alloy dissolution were established (іТі = 60 kA/m2 , іSS = 800 A/m2 , [NaCl] = 2.0 M, t = 30, ν = 50 Hz.).","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44559706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AMINO ACID, FATTY ACID AND VITAMIN COMPOSITION OF ROSA CANINA L.","authors":"Y. Ikhsanov, K. Kusainova, G. Tasmagambetova, N. Andasova, Y. Litvinenko","doi":"10.32014/2021.2518-1491.47","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.47","url":null,"abstract":"The genus rose hips, or rose (Rosa L.), belongs to the Rosaceae family. It has many cultural forms, bred under the general name Rose. Now, more than 400 species of rose hips known. Usually these are erect shrubs, less often lianas, sometimes-low tree-like forms or almost herbaceous plants. Rosehip is common in the temperate and subtropical zones of the Northern Hemisphere, it can often found in the mountainous regions of the tropical belt. Some types of rose hips distributed from the Arctic Circle in the north to Ethiopia in the south. On the American continent - from Canada to Mexico. The most favorable conditions for Rosehip are in the Mediterranean region. Several species of the genus Rosehip have a wide distribution area. Kazakhstan possesses significant resources of medicinal plant raw materials. Among the most priority representatives of the wild flora are species of the wild rose genus - Rosa L. as the most valuable medicinal plant. In total, 21 species of wild rose grow in the republic, including 5 in Central Kazakhstan: R. glabrifolia - w. naked, R. laxa Retz. - w. loose, R. acicularis Lindl. - (w. Spiny), R. majalis Herrm. (R. cinnamomea L.) - w. May (w. cinnamon) and R. pimpinellifolia L. (R. spinosissima L.) - w. femoral. Kazakh species of the genus Rosa L Rosehip fruits distinguished by a high content of biologically active substances and are widely used in medicine. Plant raw materials collected in the southern region of the Republic of Kazakhstan (Almaty region). The crushed air-dry raw material was extracted with hexane and chloroform in a raw material-reagent ratio (1:10) in a Soxhlet apparatus. Plants of the genus Rosa are rich in vitamins A, C, E and group B, and also contain sugars, flavonoids, saponins, phytosterols, glycosides, tannins, organic acids, amygdalin, essential oils. Thus, rosehip is a promising raw material for the creation of domestic medicines. This article examines the study of the quantitative composition of amino acids and vitamins in the fruits of the species of the genus Rosa widespread in Kazakhstan in the supercritical extract, isolated and the fruits of the Rosa canina plant, in order to establish the possibility of using and with the subsequent cultivation of the selected species.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45509127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"КҮРІШ ҚАЛДЫҒЫМЕН МҰНАЙ ШЛАМЫН БІРГЕ ӨҢДЕУДЕ БАЙЛАНЫСТЫРУШЫ КРАХМАЛ НЕГІЗІНДЕ БРИКЕТТЕЛГЕН БЕЛСЕНДІРІЛГЕН КӨМІР АЛУ","authors":"Н.О. Аппазов, Б.М. Диярова, Б. М. Базарбаев, Т. Асылбекқызы, Б. Ж. Джиембаев","doi":"10.32014/2021.2518-1491.42","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.42","url":null,"abstract":"Мақалада брикеттелген белсендірілген көмір алу үшін күріш қалдығымен мұнай қалдығына байланыстырушы крахмалдың әсері зерттелді. Күріш қалдығы (қауызы және сабаны) мен мұнай шламын бірге өңдеу арқылы брикеттелген белсендірілген көмір алу үшін байланыстырушы крахмал қосылды. Брикетті карбонизациялау және белсендіру кварцты шыныдан жасалған түтікте ұзындығы 300 мм және диаметрі 60 мм, қыздыру бөлімінің ұзындығы 200 мм болатын BR-12 NFT сериялы жоғары температуралы вакуумдық түтікті пеште жүргізілді. Пешке күріш қалдығы (қауызы мен сабаны), мұнай шламы және крахмалды қосу арқылы алынған брикет орналастырылды. Карбонизация 500ºС температурада, белсендіру 850ºС температурада 2:1 қатынаста су буымен жүргізілді. Күріш қалдығы мен мұнай шламына крахмал байланыстырушысын қосу қатынастарының өнім қасиетіне әсері зерттелді. Брикетті алудың оңтайлы қатынасы күріш қауызы: мұнай шламы: крахмалдың = 9:1:2 (салмақтары бойынша) қатынасы болып табылды. Брикеттелген белсендірілген көмірдің йод бойынша адсорбциялық белсенділігі, су бойынша жалпы кеуектер көлемі, ылғалдың массалық үлесі, метилен көгі бойынша адсорбциялық белсенділігі және үйінділік тығыздығы тәрізді көрсеткіштер зерттелді. Жүргізілген зерттеулер нәтижесі бойынша брикеттелген белсендірілген көмірдің құрамындағы крахмал мөлшері артқан сайын оның собрциялық қасиетінің жоғарылайтыны байқалды. Күріш қауызынан алынған брикеттелген белсендірілген көмірге жоғары сорбциялық қасиеттер тән. Тәжірибелік зерттеулер нәтижесі бойынша 9:1:2 қатынастағы күріш қауызы мен мұнай шламына крахмал қосу арқылы алынған брикеттелген белсендірілген көмір БАУ-МФ маркасына сәйкес келеді.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49645447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PHYSICOCHEMICAL AND ANTIOXIDANT PROPERTIES OF HUMIC ACIDS OF LOW-MINERALIZED PELOIDS OF THE TUZKOL DEPOSIT","authors":"Zh.К. Кairbekov, I. Jeldybayeva, D.Z. Аbilmazhinova, S. Suimbayeva","doi":"10.32014/2021.2518-1491.49","DOIUrl":"https://doi.org/10.32014/2021.2518-1491.49","url":null,"abstract":"As a result of studies it was found that the peloids of the deposit of Tuzkol Lake (Republic of Kazakhstan) are high quality medium-sulfide, weakly alkaline sludge muds. It was found that peloid-derived humic acid contains 49.63 % oxygen, 22.37% carbon, 9.65 % silicon and 6.26% calcium; it also contains Na, Mg, Al, Fe and an insignificant amount of S, Cl, K, F. Electron microscopy and IR spectroscopy analysis of the molecular structure of humic substances of peloids indicated that their macromolecule consists of framework olefinic and aromatic fragments with a substantial proportion of unoxidized aliphatic groups, as well as aromatic structures containing carboxyl groups. The findings of amperometric detection of the antioxidant properties of humic acids suggest that they have antioxidant activity, which will make it possible to use them as a biologically active substance for medicines.","PeriodicalId":43167,"journal":{"name":"News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43760312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}