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CONFIGURATION AND COMPETITIVE REACTIVITY OF LIGANDS IN MIXED LIGAND COMPLEXES OF DIALKYLDITIOPHOSPHATES AND AMINOBENBENZIMIDAZOLE (Part I: Au, Pt, Ag)AMINOBENBENZIMIDAZOLE (Part 2. Zn, Fe, Ni) 二烷基二硫磷与氨基苯并咪唑混合配体配合物中配体的构型和竞争反应性(第一部分:金、铂、银)。Zn, Fe, Ni)
journal of chemistry and chemical engineering Pub Date : 2020-06-20 DOI: 10.51348/vfck9268
Esbergenova Botakoz, Botakoz Z. Esbergenova
{"title":"CONFIGURATION AND COMPETITIVE REACTIVITY OF LIGANDS IN MIXED LIGAND COMPLEXES OF DIALKYLDITIOPHOSPHATES AND AMINOBENBENZIMIDAZOLE (Part I: Au, Pt, Ag)\u0000AMINOBENBENZIMIDAZOLE (Part 2. Zn, Fe, Ni)","authors":"Esbergenova Botakoz, Botakoz Z. Esbergenova","doi":"10.51348/vfck9268","DOIUrl":"https://doi.org/10.51348/vfck9268","url":null,"abstract":"With the aim of determination of electronic and geometrical structures of mixed-ligand complexes, theoretical modeling of the structures of coordination compounds of transition metals with dialkyldithiophosphate chelating ligands with aminobenzimidazoles carried out using quantum chemical methods. Using BIOVIA Materials Accelrys Studio 2017 software packages, the geometry, electron density distribution, and frontier orbitals calculated for the mixed ligand complexes of Au(III), Pt(II), Ag(I), Cu(II), Ni(II), Fe(III), which are necessary for understanding the electronic structure of coordination compounds with chelating ligands.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81592956","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
MODIFICATION OF INULINE BY IODIC ACID 碘酸对菊胺的改性
journal of chemistry and chemical engineering Pub Date : 2020-06-20 DOI: 10.51348/efaq5991
Rakhmanberdiyev Gappar, Ibragimova Кomila, Аxmedov Оliy
{"title":"MODIFICATION OF INULINE BY IODIC ACID","authors":"Rakhmanberdiyev Gappar, Ibragimova Кomila, Аxmedov Оliy","doi":"10.51348/efaq5991","DOIUrl":"https://doi.org/10.51348/efaq5991","url":null,"abstract":"In order to further modify inulin with drugs, the process of introducing reactive aldehyde groups into the inulin macromolecule was carried out. Aldehyde groups were introduced by oxidizing inulin with iodic acid. The process of oxidation of inulin and cellulose with iodic acid was compared. The quantities of aldehyde groups in the oxidized samples were estimated, their molecular weights were determined, IR spectra were measured, the iodine number of the inulin dialdehyde and their oxidation state were determined.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76598775","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
VINYLATION BY 3,6-DIMETYLOCTIN-4-DIOL-3,6 ACETYLENE 由3,6-二甲基丁香素-4-二醇-3,6乙炔进行乙烯化
journal of chemistry and chemical engineering Pub Date : 2020-06-20 DOI: 10.51348/nklx3917
Yusupova Lola, Abdukarimova Saida, Rajabov Rustambek, Khalimova Oygul
{"title":"VINYLATION BY 3,6-DIMETYLOCTIN-4-DIOL-3,6 ACETYLENE","authors":"Yusupova Lola, Abdukarimova Saida, Rajabov Rustambek, Khalimova Oygul","doi":"10.51348/nklx3917","DOIUrl":"https://doi.org/10.51348/nklx3917","url":null,"abstract":"The aim of the research work elaboration of technology of obtaine of acetylene diols and their vinyl ethers. Reaction of formation mono di vinyl ethers as a result vinyl 3,6-dimetyloktin-4-diol-3,6 by acetylene, and also influence of solvents, the catalyst and its quantity, duration of reaction, temperatures is investigated. Are defined speed of reaction. Recommended vinyl 3,6-dimetyloktin-4-diol-3,6 acetylene in the presence of highly basic systems at atmospheric pressure.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74403468","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
THE RESEARCH OF CONDITIONS FOR THE FORMATION OF PHENOL FORMALDEHYDE RESINS MODIFIED WITH HYDROXYL CONTAING POLYETHER POLYOL 研究了含羟基聚醚多元醇改性酚醛树脂的制备条件
journal of chemistry and chemical engineering Pub Date : 2020-06-20 DOI: 10.51348/rrzs6230
Magrupov Farkhad, Umarov Sherali, Tohirov Murodjon, R. Zukhra
{"title":"THE RESEARCH OF CONDITIONS FOR THE FORMATION OF PHENOL FORMALDEHYDE RESINS MODIFIED WITH HYDROXYL CONTAING POLYETHER POLYOL","authors":"Magrupov Farkhad, Umarov Sherali, Tohirov Murodjon, R. Zukhra","doi":"10.51348/rrzs6230","DOIUrl":"https://doi.org/10.51348/rrzs6230","url":null,"abstract":"The aim of the study was to study the conditions of copolycondensation of phenol alcohol with hydroxyl-containing polyether polyol in the presence of maleic anhydride chain extender in order to obtain modified thermoset phenolic-formaldehyde oligomers. Investigation of the dependence of the content of free phenol, formaldehyde and methylol groups on time during the synthesis of the modified phenol-formaldehyde resin with the ratios hydroxyl-containing polyether polyol:phenol alcohol 1:60 mol/mol and 1:100 mol/mol. It was revealed that maleic anhydride, present in the reaction medium as a copolycondensation catalyst, also participates in copolycondensation reactions as a chain extender. Moreover, as the molar fraction of phenol alcohol increases in the synthesis, an increase in the amount of maleic anhydride involved as a chain extender and an increase in the molecular weight of the resulting modified phenol-formaldehyde oligomer are observed.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85350646","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
THE POSSIBILITIES OF USING LOESS CLAY OF KATTABOG DEPOSIT IN THE PRODUCTION OF CERAMIC PRODUCTS 利用卡塔博格黄土粘土生产陶瓷制品的可能性
journal of chemistry and chemical engineering Pub Date : 2020-06-20 DOI: 10.51348/ocoq5011
R. Bahrom, S. Salima
{"title":"THE POSSIBILITIES OF USING LOESS CLAY OF KATTABOG DEPOSIT IN THE PRODUCTION OF CERAMIC PRODUCTS","authors":"R. Bahrom, S. Salima","doi":"10.51348/ocoq5011","DOIUrl":"https://doi.org/10.51348/ocoq5011","url":null,"abstract":"The aim of the research was to determine the properties of loess clay in Kattabog deposit (Uzbekistan) to identify possible areas of use. Modern methods of physicochemical analysis are used: spectroscopic, x-ray phase, electron microscopic methods of analysis. The research results showed that the main phases of clay are hydromica, quartz, kaolinite, calcite and orthoclase. Based on the research, it can be stated that the clay of Kattabog deposit has good physical and technical properties and mineralogical composition, which is a valuable raw material for the production of various ceramics, bricks, tiles, majolica and other products.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87814553","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
PRESSURE-COMPENSATED TEMPERATURE CONTROL IN RECTIFICATION COLUMN 精馏塔压力补偿温度控制
journal of chemistry and chemical engineering Pub Date : 2020-03-25 DOI: 10.51348/jfvv4951
Norkobilov Adham, Zafar Safarovich Turakulov, Kamolov Azizbek, Talipov Hojiakbar
{"title":"PRESSURE-COMPENSATED TEMPERATURE CONTROL \u0000IN RECTIFICATION COLUMN","authors":"Norkobilov Adham, Zafar Safarovich Turakulov, Kamolov Azizbek, Talipov Hojiakbar","doi":"10.51348/jfvv4951","DOIUrl":"https://doi.org/10.51348/jfvv4951","url":null,"abstract":"The focus of this work is to study the control of a rectification column (RC) for separating n-butane (nC4) and n-pentane (nC5) mixtures. Two control structures based on conventional temperature control (TC) and pressure-compensated control (PTC) structures are studied and compared using Aspentech software. The control performance of TC and PTC are investigated in terms of the control of component purities in both distillate and bottoms streams, under various disturbances in feed and pressure conditions. Due to pressure compensation, PTC is superior to TC in terms of purity and impurity control under disturbances in feed and pressure conditions. Accordingly, simulation results, from the point of view of industrial operation, the pressure-compensated temperature control (PTC) scheme provides potential solutions for a bicomponent RC.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"1986 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89844360","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 KINETIC CHARACTERISTICS OF THE PROCESS OF DECOMPOSITION OF ZINC CONCENTRATE WITH HYDROCHLORIC ACID 盐酸分解锌精矿过程动力学特性研究
journal of chemistry and chemical engineering Pub Date : 2020-03-25 DOI: 10.51348/qhxt1590
Rosilov Mansur, Deng Tianlong, Usmanov Ilham, Samadiy Murodjon
{"title":"RESEARCH OF KINETIC CHARACTERISTICS OF THE PROCESS OF DECOMPOSITION OF ZINC CONCENTRATE WITH HYDROCHLORIC ACID","authors":"Rosilov Mansur, Deng Tianlong, Usmanov Ilham, Samadiy Murodjon","doi":"10.51348/qhxt1590","DOIUrl":"https://doi.org/10.51348/qhxt1590","url":null,"abstract":"The aim of the study was the theoretical justification of the kinetic characteristics of the process of producing zincchloride from zinc concentrate of the Khandiza deposit. For this, the effect of temperature and dura tion of the process of autoclave zinc extraction in a 28% hydrochloric acid solution was studied at a ratio of Zn: HCI = 1:1.1. Variable parameters were the temperature of 70, 80 and 90 °C and the duration of the leaching process of 6, 8 and 10 hours. The optimal parameters for the production of zinc chloride were determined.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88488337","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
STUDY OF RECOMBINANT PROTEIN FRACTIONS FROM THE BOMBYX MORI AND PICHIA PASTORIS USING "NATIVE PAGE" METHOD 用“原生页”法研究家蚕和毕赤酵母重组蛋白
journal of chemistry and chemical engineering Pub Date : 2020-03-20 DOI: 10.51348/chod7917
Abdurhakhmanov aloliddin, Sasmakov Sobirdjan, Khasanov Shuhrat, Ashirоv Оybek
{"title":"STUDY OF RECOMBINANT PROTEIN FRACTIONS FROM THE BOMBYX MORI AND PICHIA PASTORIS USING \"NATIVE PAGE\" METHOD","authors":"Abdurhakhmanov aloliddin, Sasmakov Sobirdjan, Khasanov Shuhrat, Ashirоv Оybek","doi":"10.51348/chod7917","DOIUrl":"https://doi.org/10.51348/chod7917","url":null,"abstract":"We have studied the recombinant protein fractions of ̴ 24-34 kDa obtained from Bombyx mori - silkworm larvae and yeast Pichia pastoris. Fractions, containing the recombinant proteins by gel-electrophoresis using the “Native PAGE” method, which allows for differentiation of proteins according to their natural (surface) charge and conformational properties were studied. The results showed that the recombinant protein fraction from Bombyx mori (̴ 34 kDa) consisted of four components and fraction from Pichia pastoris (̴ 24 kDa) consisted one component. The most optimal conditions for the “Native PAGE”- the main gel: Tris HCl (pH-8.8) 244 mM, Bis-Acrylamide 10%, TEMED 0.08%, APS 0.08%; concentration gel: Tris HCl (pH-6.8) 125 mM, Bis-Acrylamide 4%, TEMED 0.05%, APS 0.05% were found.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74855616","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
NEW COMPOSITION AND METHOD FOR PRODUCING PASTA 制作面食的新成分和新方法
journal of chemistry and chemical engineering Pub Date : 2020-03-20 DOI: 10.51348/kcvv6033
Sanaev Ermat, Tursunkhodjaev Pulat, Ayhodjaeva Nodira, Normatov Anvar
{"title":"NEW COMPOSITION AND METHOD FOR PRODUCING PASTA","authors":"Sanaev Ermat, Tursunkhodjaev Pulat, Ayhodjaeva Nodira, Normatov Anvar","doi":"10.51348/kcvv6033","DOIUrl":"https://doi.org/10.51348/kcvv6033","url":null,"abstract":"The main objective of this study is to develop a composition of pasta containing a mixture of ginger, lemon and mint powder, as well as a combination of legumes and cereals with high nutritional value. This will expand the range of pasta. The problem of achieving high quality and economic efficiency is solved by improving several technological processes and using innovative methods. \u0000The effectiveness of using innovative methods of sublimation and microwave drying is shown in comparison with the drying process of instant pasta by frying it in vegetable oil.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87638882","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
INNOVATION OF UNIVERSITY SYSTEM IN THE FIELD OF SCIENTIFIC STAFF TRAINING IN EUROPE AND UZBEKISTAN: EXPERIENCE AND PROBLEMS 欧洲和乌兹别克斯坦科技人才培养领域的大学制度创新:经验与问题
journal of chemistry and chemical engineering Pub Date : 2020-03-20 DOI: 10.51348/elxg3326
Usmonov Botir
{"title":"INNOVATION OF UNIVERSITY SYSTEM IN THE FIELD OF SCIENTIFIC STAFF TRAINING IN EUROPE AND UZBEKISTAN: EXPERIENCE AND PROBLEMS","authors":"Usmonov Botir","doi":"10.51348/elxg3326","DOIUrl":"https://doi.org/10.51348/elxg3326","url":null,"abstract":"The need to improve the system of doctoral studies in the Republic of Uzbekistan is dictated by the tasks of the present. In this article, the example of European and Uzbek universities, considered the features of the reforms in the administration of training for scientific personnel undertaken in the last decade in European countries. To solve the problems of the doctoral system, it is proposed to take a number of structural steps to improve the overall quality of specialists in Uzbekistan, to ensure its attractiveness and competitiveness.","PeriodicalId":15270,"journal":{"name":"journal of chemistry and chemical engineering","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72826812","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
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