Chemical Bulletin of Kazakh National University最新文献_第5页

Pickering emulsions stabilized by some inorganic materials 一些无机材料稳定了皮克林乳剂

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Chemical Bulletin of Kazakh National University Pub Date : 2021-02-01 DOI: 10.15328/cb1135

A. Adilbekova, Ayaulym Yertayeva

引用次数: 0

Production of carbon nanotubes and their functionalization 碳纳米管的制备及其功能化

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Chemical Bulletin of Kazakh National University Pub Date : 2020-12-21 DOI: 10.15328/cb1147

M. Nazhipkyzy, Nazgul Kuantai

{"title":"Production of carbon nanotubes and their functionalization","authors":"M. Nazhipkyzy, Nazgul Kuantai","doi":"10.15328/cb1147","DOIUrl":"https://doi.org/10.15328/cb1147","url":null,"abstract":"In this work, the synthesis of carbon nanotubes was carried out on the sand surface with hydrophobic properties by chemical vapor deposition (CVD). The effective temperature for the synthesis of carbon nanotubes is 800 °C. Propane-butane gas mixture was used as a source of gaseous carbon. Argon gas (Ar) was used as an inert carrier gas. Nickel nitrate (Ni(NO3)2) was chosen as a catalyst for producing carbon nanotubes. Despite all the special properties of carbon nanomaterials, one of the problems with its use is its tendency to agglomerate and inert to the matrix of various substances. In order to solve this problem, the chemical functionalization of the surface layer of multiwall carbon nanotubes was carried out. To introduce carboxyl groups into the surface layer of carbon nanotubes, its surface was treated with a concentrated mixture of acids H2SO4/HNO3. It has been established that the main part of the functional groups in the surface layer of nanotubes are carboxyl, carbonyl and hydroxyl groups. Carbon nanotubes synthesized on the surface of hydrophobic sand were analyzed by the following research methods: scanning electron microscope, optical microscope, elemental analysis, Raman spectroscopy and a qualitative assessment of functionalized nanotubes using IR spectroscopy.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49511269","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}

引用次数: 0

Treatment of waste water containing chromium (VI) 含铬废水的处理

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Chemical Bulletin of Kazakh National University Pub Date : 2020-12-21 DOI: 10.15328/cb1113

Kundyz S. Sovetova, A. Ismailova

{"title":"Treatment of waste water containing chromium (VI)","authors":"Kundyz S. Sovetova, A. Ismailova","doi":"10.15328/cb1113","DOIUrl":"https://doi.org/10.15328/cb1113","url":null,"abstract":"In the production of chromium and in the process of transportation of chromiumcontaining materials, contamination of natural waters and soils with chromium compounds inevitably occurs. In this paper, the sorption of chromium (VI) ions with carbon sorbents is studied as a method for treating waste and natural water contaminated with chromiumcontaining compounds. Sorption method of extraction and concentration of elements is one of the most effective and simple technological method of chromium extraction. For extraction of chromium (VI), carbon sorbents obtained from recycling of wheat grains waste (RWGW) (wheat husk or bran) modified with ammonium nitrate were used. RWGW (recycling of wheat grains waste) + NH4NO3 (3%), RWGW (recycling of wheat grains waste) + NH4NO3 (5%), RWGW (recycling of wheat grains waste) + NH4NO3 (7%) were used. Chromium sorption was investigated depending on various factors. It has been established that the most effective sorbent is RWGW (recycling of wheat grains waste) + NH4NO3 (3%), with which it is possible to extract chromium by 98% from solutions at pH=1 in 30 min. This sorbent has been tested for industrial wastewater treatment containing up to 36 mg/L of chromium (VI) ions. The metal recovery rate was 95.2%. The obtained results indicate the prospects of application of RWGW (recycling of wheat grains waste) + NH4NO3 (3%) for wastewater treatment from chromium (VI).","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49350963","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}

引用次数: 0

Thermoluminescent and X-ray diffraction methods in dating of ceramics from archaeological excavations of the Orikti monument (Almaty region) 热释光和x射线衍射法测定阿拉木图地区奥里克蒂遗址考古发掘陶瓷的年代

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Chemical Bulletin of Kazakh National University Pub Date : 2020-09-08 DOI: 10.15328/cb1143

A. Bakhadur, N. Aluker, G. Bekseitov, Yerbolat B. Ospanov, B. Uralbekov

{"title":"Thermoluminescent and X-ray diffraction methods in dating of ceramics from archaeological excavations of the Orikti monument (Almaty region)","authors":"A. Bakhadur, N. Aluker, G. Bekseitov, Yerbolat B. Ospanov, B. Uralbekov","doi":"10.15328/cb1143","DOIUrl":"https://doi.org/10.15328/cb1143","url":null,"abstract":"1Казахский национальный университет имени аль-Фараби, Алматы, Казахстан 2Кемеровский государственный университет, Кемерово, Россия *E-mail: askar.bakhadur@gmail.com В настоящей работе возраст археологических керамических изделий определяется термолюминесцентным (ТЛ) методом после рентгенофазового анализа (РФА) образцов керамики, подтверждающего, что основой составной фазой изделий является кварц. Это позволило использовать методику пробоподготовки без выделения мономинеральной фазы кварца из керамического образца. Для определения мощности годовой поглощенной радиационной дозы в месте раскопки были применены почвоэквивалентные термолюминесцентные детекторы на основе оксида кремния. Среднее значение мощности дозы составило 0,62±0,02 сГр/год. Расчет возрастов керамики проводился после проверки линейности накопления светосумм для образцов в дозовом диапазоне до 2000 сГр. На основании комплекса проведенных исследований получены датировки керамических изделий, не противоречащие археологическим представлениям о возрасте этих изделий. Предлагается использовать методику определения возраста керамических образцов термолюминесцентным методом после определения их фазово-минерального состава методом РФА. В случае если преобладающей минеральной составной фазой является кварц (доля кварца составляла более 60% от общего состава керамики), анализ можно проводить без выделения фракции кварца, в случае наличия соизмеримых с кварцем фракции глинистых минералов предлагается проводить выделение кварца.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":"1 1","pages":"4-10"},"PeriodicalIF":0.3,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46202566","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}

引用次数: 0

Research of polyphenolic compounds of Circaea lutetiana l. 黄芪多酚类化合物的研究。

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Chemical Bulletin of Kazakh National University Pub Date : 2020-09-08 DOI: 10.15328/cb1151

Akmaral Kozhantayeva, S. Rakhmadiyeva

{"title":"Research of polyphenolic compounds of Circaea lutetiana l.","authors":"Akmaral Kozhantayeva, S. Rakhmadiyeva","doi":"10.15328/cb1151","DOIUrl":"https://doi.org/10.15328/cb1151","url":null,"abstract":"One of the renewable sources of plant material is the plants of the Onagraceae L. family, growing on the territory of the Republic of Kazakhstan. The plant Circaea lutetiana L., (bipartite of Paris) of the genus Circaea L., (bipartite) of the family Onagraceae L., (fireweed), which belongs to medicinal, dyeing and food plants, was taken as an object of study. The presence of polyphenolic compounds was detected by paper chromatography in an ascending manner in solvent systems: butanol-acetic acid-water (BAW) (41:5), (40:12.5:29), 2%, 15% acetic acid with specific developers: diazotized sulfanilic acid (DZSA), diazotized para-nitroaniline (DZPNA), ammonia vapors, aluminum chloride (AlCl3), ferric chloride (FeCl3), ammonium-iron alum (AIA), vanillin reagent in sulfuric acid. The content of gallic and ferulic acids was determined in the roots and fruits of the plant, and ellagic acid in the leaves and fruits. Flavonoids and tannins of the hydrolyzable type were found in all plant organs, the largest number of them in fruits and the smallest in roots. Using the method of spectrophotometry in all plant organs, the content of flavonoids in terms of State standard sample (SSS) quercetin was determined (roots 0.96%, stems 2.03%, leaves 2.74%, fruits 3.67%), the content of tannins in terms of tannin (roots 0.005%, stems 1.19%, leaves 3.69%, fruits 5.99%).","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":"1 1","pages":"18-27"},"PeriodicalIF":0.3,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44233726","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}

引用次数: 0

Gelatin: sources, preparation and application in food and biomedicine 明胶:来源、制备及其在食品和生物医药中的应用

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Chemical Bulletin of Kazakh National University Pub Date : 2020-09-01 DOI: 10.15328/cb1112

Elvira Shatabayeva, G. Mun, Yerengaip Shaikhutdinov, V. Khutoryanskiy

{"title":"Gelatin: sources, preparation and application in food and biomedicine","authors":"Elvira Shatabayeva, G. Mun, Yerengaip Shaikhutdinov, V. Khutoryanskiy","doi":"10.15328/cb1112","DOIUrl":"https://doi.org/10.15328/cb1112","url":null,"abstract":"Gelatin is a proteinaceous substance composed of all the essential amino acids (except tryptophan) and derived from collagen using a hydrolysis technique. Hydrogels and modified composites based on gelatin are widely used in the food industry, biomedicine, pharmaceutical industry and food packaging materials due to their biocompatibility, biodegradability, nonimmunogenicity and ability to stimulate cell adhesion and proliferation. Gelatin can absorb 5-10 times its weight of water and is the main ingredient of hard and soft capsules in pharmaceutical industry. It melts above 30°C and easily releases biologically active compounds, nutrients and drugs in human gastrointestinal tract. In addition, gelatin contains arginine-glycine-asparagine RGD-sequences in the polymer structure and contributes to various functions such as antioxidant, anti-hypertensive, anti-microbial, tissue regeneration, wound healing, enhances bone formation and anti-cancer therapy. This article reports a brief overview of gelatin sources, gelatin preparation processes and its physico-chemical properties, as well as advances in the preparation of gelatin-based composite materials and hydrogels for tissue engineering, drug delivery, wound dressings, active packaging using various cross-linking techniques.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67385149","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}

引用次数: 2

Chitosan based hydrogels and their use in medicine 壳聚糖水凝胶及其在医学上的应用

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Chemical Bulletin of Kazakh National University Pub Date : 2020-06-05 DOI: 10.15328/cb1100

Guzel Аbilova, D. Makhayeva, G. Irmukhametova, V. Khutoryanskiy

引用次数: 0

Obtaining of luminescent material based on NaBaY(BO3)2 doped with terbium and europium ions 铽铕离子掺杂NaBaY(BO3)2发光材料的制备

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Chemical Bulletin of Kazakh National University Pub Date : 2020-06-05 DOI: 10.15328/cb1122

Zh. K. Orazov, A. Bolatov, N. Kononova, V. Shevchenko, K. Kokh, B. Uralbekov, A. Kuznetsov, A. Kokh

引用次数: 0

The effect of anionic impurities on the sorption extraction of molybdenum from leaching solutions 阴离子杂质对钼浸出液吸附萃取的影响

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Chemical Bulletin of Kazakh National University Pub Date : 2020-06-03 DOI: 10.15328/CB1138

Yelena Panova, Yenlik O. Abzhan, A. Zhussupova

{"title":"The effect of anionic impurities on the sorption extraction of molybdenum from leaching solutions","authors":"Yelena Panova, Yenlik O. Abzhan, A. Zhussupova","doi":"10.15328/CB1138","DOIUrl":"https://doi.org/10.15328/CB1138","url":null,"abstract":"Al-Farabi Kazakh National University, Almaty, Kazakhstan *E-mail: yenglikabzhan@gmail.com Molybdenum is one of the most important uranium-related metals. In the ores of many deposits, the molybdenum content is comparable to the uranium content. The processing of complex uranium-molybdenum ores is based on the methods of acid and soda autoclave leaching, in which uranium and molybdenum pass into solution. At the present time, the associated extraction of molybdenum by the sorption method has been developed and introduced. In this case, the capacity of ion exchangers with respect to uranium and molybdenum substantially depends on the salt composition of the medium. The aim of this work is to study the sorption of molybdenum from a carbonate leach solution on BD-301G-I anion exchange resin in the presence of the most common anionic impurities in industrial solutions. Studies of the sorption capacity of anion exchange resin with respect to molybdenum were carried out under static conditions with stirring of the solution with the sorbent during eight hours. Sorption of molybdenum was carried out from carbonate solutions with the corresponding given concentrations of impurity components. According to the results of studies, it was found that, according to the strength of the depressing effect, the considered anions arranged in the following row: S2O3 2> NO3 > Cl> SO4 2> HCO3 > CO3 2> PO4 3-. The results of this study can be used to further study the sorption of molybdenum from real industrial solutions of carbonate leaching.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":"1 1","pages":"4-9"},"PeriodicalIF":0.3,"publicationDate":"2020-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46009171","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}

引用次数: 1

Preparation and publication of chemistry papers in international peer-reviewed journals 在国际同行评审的期刊上准备和发表化学论文

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Chemical Bulletin of Kazakh National University Pub Date : 2020-03-25 DOI: 10.15328/cb1103

V. Khutoryanskiy

{"title":"Preparation and publication of chemistry papers in international peer-reviewed journals","authors":"V. Khutoryanskiy","doi":"10.15328/cb1103","DOIUrl":"https://doi.org/10.15328/cb1103","url":null,"abstract":"Some recommendations presented on the preparation of chemistry papers for publication in peer-reviewed journals, indexed in Scopus and Web of Science. Some advice given on the selection of a journal for publication. Impact factors and other types of classifications for different chemistry journals and publication business models by publishers briefly discussed. Some publishers specialising on publication of chemistry papers considered. Recommendations given on the preparation of each section in a manuscript, quality of illustrations as well as the documents necessary for submission of these to the journal. Some approaches used to revise the manuscript and to deal with reviewer comments also briefly discussed. This work is prepared based on the course “How to write a paper” delivered by the author at the University of Reading (United Kingdom) for a number of years for post-graduate students from physical natural sciences as well as the courses delivered in some institutions of China, Estonia, Kazakhstan and Russia. The course is based on author’s own experience in publishing over 150 papers in different peer-reviewed journals, refereeing numerous manuscripts as well as his work as an editor for some journals.","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44370732","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}

引用次数: 1