Acta Chemica Iasi最新文献_第8页

Abstracts for The XLVIIth National Scientific-Methodological Session “Educational Methods and Means for Chemistry”, Iasi, Romania 第十六届全国科学方法会议“化学教育方法与手段”摘要，罗马尼亚，雅西

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Acta Chemica Iasi Pub Date : 2018-12-01 DOI: 10.2478/achi-2018-0022

引用次数: 0

Abstracts for 9th Scientific Session of Undergraduate, Masters and Phd Students, Iasi, Romania 罗马尼亚，雅西，第九届本科生，硕士和博士科学会议摘要

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Acta Chemica Iasi Pub Date : 2018-12-01 DOI: 10.2478/achi-2018-0023

Carmen Mita

引用次数: 0

Total Mineralization of Malachite Green Dye by Advanced Oxidation Processes 孔雀石绿染料的高级氧化全矿化研究

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Acta Chemica Iasi Pub Date : 2018-12-01 DOI: 10.2478/achi-2018-0017

Diana-Carmen Mirila, Mădălina-Ștefania Pîrvan, Nicoleta Platon, Ana-Maria Georgescu, V. Zichil, I. Nistor

引用次数: 5

Influence of Concentrations of Methacrylate and Acrylate Monomers on the Properties of Fiber Reinforced Polymethyl Methacrylate Denture Base Materials 甲基丙烯酸酯和丙烯酸酯单体浓度对纤维增强聚甲基丙烯酸甲酯义齿基托材料性能的影响

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Acta Chemica Iasi Pub Date : 2018-12-01 DOI: 10.2478/achi-2018-0020

Faik Tugut, M. Turgut, Dursun Saraydın

{"title":"Influence of Concentrations of Methacrylate and Acrylate Monomers on the Properties of Fiber Reinforced Polymethyl Methacrylate Denture Base Materials","authors":"Faik Tugut, M. Turgut, Dursun Saraydın","doi":"10.2478/achi-2018-0020","DOIUrl":"https://doi.org/10.2478/achi-2018-0020","url":null,"abstract":"Abstract The study aimed to evaluate the effects of adding different concentrations of 2 hydroxyethyl methacrylate (HEMA), 2-hydroxyethyl acrylate (HEA), ethyl methacrylate (EA) and isobutyl methacrylate (IBMA) monomers on the structural, thermal and mechanical properties of a fiber reinforced heat-polymerized acrylic resin. For each test, 126 acrylic resin specimens were fabricated and divided into 6 groups with 7 specimens each. One group was the control group, the other one is a fiber reinforced group and others were the test groups, which were formed according to the different concentrations of monomers. 6 mm length, and the weight ratio of 3% short glass fibers are added to acrylic powder polymerized by heating. The 2%, 5%, 10%, at 20 % ratios of different comonomers added to a monomer of MMA are composed of copolymer structures. Flexural strength was assessed with a three-point bending test using a universal testing machine. Impact strength testing was conducted using an impact test machine by the Charpy method. The analysis of the connection between acrylic resin and fiber by SEM and structural changes in the acrylic resin was investigated by FTIR spectroscopy. Data analyses using analysis of Kruskal-Wallis and Mann-Whitney U tests (α=0.05) significant difference tests showed that adding 2%, 5% HEMA and IBMA monomers significantly increased the flexural and impact strength compared to the control, only fiber and others group (P< 0.05). It is observed that the process of adding low concentration of HEMA and IBMA monomers improved certain mechanical properties of fiber reinforced with polymethylmethacrylate.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":"8 1","pages":"329 - 350"},"PeriodicalIF":0.5,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81980170","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: 7

Synthesis and Evaluation of Cytotoxic Activity on Mcf-7 Cell Line of Some Diesters Derived from 5-(Hydroxybenzylidene)Thiazolidine-2,4-Diones 5-(羟基苄基)噻唑烷-2,4-二酮类二酯的合成及对Mcf-7细胞株的细胞毒活性评价

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Acta Chemica Iasi Pub Date : 2018-12-01 DOI: 10.2478/achi-2018-0015

H. Tran, Hien Cao Nguyen, Thi Thuy Van Nguyen, T. T. Nguyen, T. N. Vo, C. Nguyend

引用次数: 1

The Properties of Immobilized Invertase Onto a New Support Material; Poly(Methacrylamide/Maleic Acid) Copolymeric Hydrogel 固定化转化酶在新型载体材料上的性能研究聚甲基丙烯酰胺/马来酸共聚水凝胶

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Acta Chemica Iasi Pub Date : 2018-12-01 DOI: 10.2478/achi-2018-0019

H. Öztop, Fatma Banu Çatmaz, Dursun Saraydın

引用次数: 2

Silica Ammonium Acetate(SiO2-NH4OAc) Catalyzed Facial Synthesis of Dihydropyrazolo[4',3':5,6]Pyrano[2,3-d]Pyrimidine-5,7-Diones 二氧化硅-醋酸铵(SiO2-NH4OAc)催化表面合成二氢吡唑[4′，3′:5,6]吡喃[2,3-d]嘧啶-5,7-二酮

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Acta Chemica Iasi Pub Date : 2018-07-01 DOI: 10.2478/achi-2018-0004

Fatemeh Rigi, H. Shaterian

引用次数: 2

Synthesis of New Molecular Imprinted Polymer for Highly Recognition of Cholic Acid 新型高识别胆酸分子印迹聚合物的合成

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Acta Chemica Iasi Pub Date : 2018-07-01 DOI: 10.2478/achi-2018-0009

C. Hepokur, H. Öztop, Dursun Saraydın

{"title":"Synthesis of New Molecular Imprinted Polymer for Highly Recognition of Cholic Acid","authors":"C. Hepokur, H. Öztop, Dursun Saraydın","doi":"10.2478/achi-2018-0009","DOIUrl":"https://doi.org/10.2478/achi-2018-0009","url":null,"abstract":"Abstract In this study, molecular imprinted polymers for highly selective recognition of cholic acid, which is a bile acid, were prepared. Acrylamide, methacrylic acid, methacrylamide were chosen as monomer for the production of molecularly imprinted polymers. Functional monomers were polymerized with various crosslinkers; ethylene glycol dimethacrylate (EGDMA), 1,4-butanediol diacrylate (BUT), trimethylpropane triacrylate (TMT) with target molecule (MIP-EGDMA, MIP-BUT and MIP TMT) and various MIPs were prepared. The cholic acid was removed from MIP with a suitable method. NIP polymers were synthesized without cholic acid (NIPEGDMA, NIP-BUT and NIP-TMT). For the characterization of synthesized polymers FTIR, DSC, TGA, SEM analyses were used. The parameters that affect the adsorption of target species on polymers such as temperature, pH, and concentration were evaluated. The selectivity and reusability studies were also investigated. It is concluded that MIPs showed better adsorption capacity than NIPs for all solvents for cholic acid. The adsorption sequencing is MIP-TMT > MIP-BUT > MIP EGDMA. The maximum adsorption achieved with ethyl alcohol. The adsorption of cholic acid varies with chancing pH for all produced MIPs and NIPs. It is concluded that the adsorption of cholic acid is not affected by the temperature. The adsorption of cholic acid is followed as L type from Giles adsorption isotherms. The thermodynamic parameters are proved the physical nature of adsorption process. The studies conducted with deoxycholic acid, taurocholic acid that is homolog to cholic acid showed that produced MIPs are highly selective for cholic acid.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":"451 1","pages":"123 - 152"},"PeriodicalIF":0.5,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79046023","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 Heavy Metals on the Agricultural Land in Bajgora Region, Kosovo 科索沃巴伊戈拉地区农用地重金属含量研究

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Acta Chemica Iasi Pub Date : 2018-07-01 DOI: 10.2478/achi-2018-0008

M. Kelmendi, M. Sadiku, S. Kadriu, Florent Dobroshi, Liridona Igrishta, Blerim Baruti

{"title":"Research of Heavy Metals on the Agricultural Land in Bajgora Region, Kosovo","authors":"M. Kelmendi, M. Sadiku, S. Kadriu, Florent Dobroshi, Liridona Igrishta, Blerim Baruti","doi":"10.2478/achi-2018-0008","DOIUrl":"https://doi.org/10.2478/achi-2018-0008","url":null,"abstract":"Abstract For the first time, a survey about agricultural land focusing on the partitioning of the Pb, Cd, and Zn to the rural part of Mitrovica in northern Kosovo was made. Kosovo’s Mitrovica is one of the main industrial sites in the former Yugoslavia and a world-class mining district in Europe. The process of obtaining metals dates since 1927. From this year until 2000, the technological process of acquisition/obtaining has been accompanied by environmental pollution by creating waste landfills. These landfills are located on the outskirts of the city of Mitrovica at a distance from 1 to 4 km. In this area high levels of heavy metals in air, water, and earth were noticed. Therefore, these metal residues have a particular impact on air, earth, water, and effects on plants, animals and humans health. This situation became alarming; therefore in 2000 the production process was discontinued. During the period from 2000 to the present day, there is noticed a change of nature. Residents of the area have begun to work on agricultural lands without realizing the potential risk coming up. Despite the stagnation of industrial production, environmental pollution continues even further, especially from the landfill generated by industrial wastes. Widespread and very visible contamination mainly from Pb, Zn, Cd were found on the ground, with the highest concentrations measured near the Zveçan smelter. A significant amount of Cd, Pb, and Zn in contaminated soils/ground was quite movable/changeable, suggesting that these elements may be readily available for plants and soil/ground organisms. The main objective of this work is to address this pollution and take measures for education and information.","PeriodicalId":6958,"journal":{"name":"Acta Chemica Iasi","volume":"2 1","pages":"105 - 122"},"PeriodicalIF":0.5,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89238372","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: 5

Synthesis of 2-(2-(4-Phenyl-2,3-Dihydrobenzo[B][1,4]Thiazepin-2-YL) Phenoxy)-N-(P-Tolyl)Acetamide 2-(2-(4-苯基-2,3-二氢苯并[B][1,4]噻唑平-2- yl)苯氧基)- n-(对苯基)乙酰胺的合成

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Acta Chemica Iasi Pub Date : 2018-07-01 DOI: 10.2478/achi-2018-0002

C. T. Nguyen, H. Bui, D. H. Nguyen

引用次数: 2