Journal of the Turkish Chemical Society, Section A: Chemistry最新文献_第6页

A comprehensive study on electrospinning of poly (vinyl alcohol): effects of the TCD, applied voltage, flow rate and solution concentration 聚乙烯醇静电纺丝的综合研究：TCD、外加电压、流速和溶液浓度的影响

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-06-23 DOI: 10.18596/jotcsa.741452

G. Acik

引用次数: 4

Effect of Pore Morphology on the Thermal Conductivity of Geopolymer Foam 孔隙形态对地聚合物泡沫导热性的影响

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-06-23 DOI: 10.18596/jotcsa.660727

C. Kurtulus, M. Baspinar

{"title":"Effect of Pore Morphology on the Thermal Conductivity of Geopolymer Foam","authors":"C. Kurtulus, M. Baspinar","doi":"10.18596/jotcsa.660727","DOIUrl":"https://doi.org/10.18596/jotcsa.660727","url":null,"abstract":"Geopolymers are considered an alternative to conventional cement recently. The use of fly ash and blast furnace slag in geopolymer, which are waste products considered as an environmentally friendly product due to the solution to the storage of wastes also. Geopolymer concrete production is also reported to be 44-64% less than the cement that causes the most CO2 emissions. CO2 emissions are reduced due to the minimum processed natural minerals and industrial waste products used in the geopolymer system. For this reason, this study comes to the fore in terms of the evaluation of wastes. Production of porous geopolymers is potential in use in many industrial applications such as filtering, thermal insulation, light structural material, and catalysis. By controlling the pore type, pore size distribution, pore connectivity, and shape of porosities, potential usages are differentiated. In this study, closed porosity geopolymer foams were produced by the geopolymerization technique with the help of hydrogen peroxide and calcium stearate (CaS) as a surfactant. The thermal conductivity, density, and strength values was correlated with the changing pore size distribution depending on the amount of surfactant and foaming agent. In this study, porous geopolymers with density values 450-500 kg/m3, 0.069 W/mK thermal conductivity, and 2.1 MPa strength value was reached. The reduction in pore sizes due to CaS increase was analyzed. However, we did not observe a decrease in thermal conductivity values due to the reduction of the pore size. Exciting results for CaS content on thermal conductivity were reported.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"535-544"},"PeriodicalIF":0.0,"publicationDate":"2020-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41854835","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

A novel selective “turn-on’’ fluorescent sensor for Hg2+ and its utility for spectrofluorimetric analysis of real samples 一种新的Hg2+选择性“开启”荧光传感器及其在实际样品荧光光谱分析中的应用

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-06-23 DOI: 10.18596/jotcsa.733160

S. Tümay

引用次数: 0

Designing of Novel Potential Inhibitors of a-amylase by 3D-QSAR Modeling and Molecular Docking Studies 基于3D-QSAR模型和分子对接研究的新型a-淀粉酶潜在抑制剂设计

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-05-10 DOI: 10.18596/jotcsa.703026

K. E. Khatabi, I. Aanouz, R. El-mernissi, A. Khaldan, M. A. Ajana, M. Bouachrine, T. Lakhlifi

引用次数: 4

Catalytic performance of polyvinylidene fluoride (PVDF) supported TiO2 additive at microwave conditions 聚偏氟乙烯(PVDF)负载TiO2添加剂的微波催化性能

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-04-03 DOI: 10.18596/jotcsa.610886

H. Gümüş

引用次数: 3

A Turn-on Fluorescent Sensor For Cadmium Ion Detection In Aqueous Solutions 一种用于检测水溶液中镉离子的荧光传感器

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-02-15 DOI: 10.18596/jotcsa.638912

Ziya Aydin

引用次数: 2

Antibiotic Susceptibility Of Klebsiella pneumoniae Strains Isolated From Clinical Samples 临床分离肺炎克雷伯菌的药敏分析

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-02-15 DOI: 10.18596/jotcsa.635088

Ahmet Ozan Özgen, O. E. Eyüpoğlu

{"title":"Antibiotic Susceptibility Of Klebsiella pneumoniae Strains Isolated From Clinical Samples","authors":"Ahmet Ozan Özgen, O. E. Eyüpoğlu","doi":"10.18596/jotcsa.635088","DOIUrl":"https://doi.org/10.18596/jotcsa.635088","url":null,"abstract":"Antibiotic resistance in bacteria has become a worrying phenomenon in today's world. K. pneumoniae is a member of the Enterobacteriaceae family, which causes nosocomial infections as an opportunistic pathogen but inherently harboured as a part of natural human microbiota. Carbapenem resistance of K. pneumoniae was a rare occurrence up to ten years ago, but in recent years many types of carbapenemase producing K. pneumoniae have become common. The aim of this retrospective study; analyzing susceptibility to various antibiotics, commonly used in treatment, against K. pneumoniae strains isolated from various infection sites. Antibiotic susceptibility tests were performed by using the VITEK 2 Compact ® automated system. In this study, 502 K. pneumoniae strains isolated from patients that treated at various services of a university hospital with 515 bed capacity were examined. When compared to the data available with studies of recent years in Turkey, especially in intensive care and inpatient services, resistance of K. pneumoniae strains to antibiotics, against most carbapenems, are rapidly increasing in the degree of high concern. Therefore, in all hospitals, antibiotic management policies should be implemented with a multidisciplinary approach.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"319-326"},"PeriodicalIF":0.0,"publicationDate":"2020-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45204995","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: 3

Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies 壳聚糖-硅藻土复合材料去除水中Pb2+离子:平衡、动力学和热力学研究

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2020-02-15 DOI: 10.18596/jotcsa.634590

Zeynep Mine Şenol, S. Şimşek

{"title":"Removal of Pb2+ ions from aqueous medium by using chitosan-diatomite composite: equilibrium, kinetic and thermodynamic studies","authors":"Zeynep Mine Şenol, S. Şimşek","doi":"10.18596/jotcsa.634590","DOIUrl":"https://doi.org/10.18596/jotcsa.634590","url":null,"abstract":"Abstract: In this study, a novel, low-cost, natural, and highly effective adsorbent, chitosan (Ch) -diatomite (D) composite was synthesized. Ch-D composite was tested as an effective and alternative adsorbent for the removal of Pb 2+ ions. The Ch-D composite was characterized by FT-IR, SEM-EDX and PZC analyses. The adsorption process of Pb 2+ ions onto Ch-D as initial lead concentration, s olution pH, temperature, contact time and recovery was investigated . From the adsorption process results, it has been observed that the highest removal efficiency is approximately 95% at a contact time of 4-hour, initial Pb 2+ concentration of 500 mg L -1 and agitation speed of 150 rpm at natural pH 4.0. The maximum Pb 2+ adsorption capacity from the Langmuir model was f ound as 0.154 mol kg -1 at 25 o C. Besides, adsorption kinetics was also explained with pseudo-first-order models. Adsorption thermodynamics have shown that Pb 2+ adsorption onto Ch-D is possible, spontaneous and exothermic. Ch-D composite can become an alternative adsorbent for the treatment of lead ions in the wastewater.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"307-318"},"PeriodicalIF":0.0,"publicationDate":"2020-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47209869","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

Development of docking programs for Lomonosov supercomputer 罗蒙诺索夫超级计算机对接程序的开发

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2019-12-25 DOI: 10.18596/jotcsa.634130

V. Sulimov, I. Ilin, D. Kutov, A. Sulimov

{"title":"Development of docking programs for Lomonosov supercomputer","authors":"V. Sulimov, I. Ilin, D. Kutov, A. Sulimov","doi":"10.18596/jotcsa.634130","DOIUrl":"https://doi.org/10.18596/jotcsa.634130","url":null,"abstract":"The initial step of the rational drug design pipeline extremely needs an increase in effectiveness. This can be done using molecular modeling: docking and molecular dynamics. Docking programs are popular now due to their simple idea, quickness and ease of use. Nevertheless accuracy of these programs still leaves much to be desired and discovery by chance and experimental screening still play an important role. Docking performs ligand positioning in the target protein and estimates the protein-ligand binding free energy. While in many cases positioning accuracy of docking is satisfactory, the accuracy of binding energy calculations is insufficient to perform the hit-to-lead optimization. The accuracy depends on many approximations which are built into the respective model. We show that all simplifications restricting docking accuracy can be withdrawn and this can be done on the basis of modern supercomputer facilities allowing to perform docking of one ligand using many thousand computing cores. We describe in short the SOL docking program which is used during years for virtual screening of large ligand databases using supercomputer resources of LomonosovMoscow State University. SOL to some extent is organized similarly to popular docking programs and reflects their limitations and advantages. We present our supercomputer docking programs, FLM and SOL-P, developed over the past 5 years for Lomonosov supercomputer of Moscow State University. These programs are free of most important simplifications and their performance shows the road map of the docking accuracy improvement. Some results of their performance for very flexible ligand docking into the rigid protein and docking of flexible ligands into the protein with some moveable protein atoms are presented. The so-called quasi-docking approach combining a force field and quantum chemical methods is described and it is shown that best docking accuracy is reached with the PM7 method and the COSMO solvent model.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"259-276"},"PeriodicalIF":0.0,"publicationDate":"2019-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45640851","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: 9

pH effect on hydrothermal synthesis of the coordination polymers containing pyrazine-2,3-dicarboxylate: Investigation of thermal stability, luminescence and electrical conductivity properties pH对含吡嗪-2,3-二羧酸盐配位聚合物水热合成的影响：热稳定性、发光和导电性能的研究

Journal of the Turkish Chemical Society, Section A: Chemistry Pub Date : 2019-12-19 DOI: 10.18596/jotcsa.565700

Burak Ay, E. Yıldız, J. Zubieta

引用次数: 1