Celal Bayar Universitesi Fen Bilimleri Dergisi最新文献_第10页

Application of Green Catalysts for the Esterification of Benzoic Acid with Different Alcohols 绿色催化剂在苯甲酸与不同醇酯化反应中的应用

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-12-29 DOI: 10.18466/CBAYARFBE.370364

E. Sert, F. S. Atalay

{"title":"Application of Green Catalysts for the Esterification of Benzoic Acid with Different Alcohols","authors":"E. Sert, F. S. Atalay","doi":"10.18466/CBAYARFBE.370364","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.370364","url":null,"abstract":"In this study, three different catalysts were applied as catalysts for esterification of benzoic acid with ethanol, butanol and hexanol. These catalysts are ionic liquid, deep eutectic solvent, ion exchange resin. Amberlyst 15, ion exchange resin, was used as control catalyst to observe the catalytic activity of new generation solvent, deep eutectic solvent. Deep eutectic solvents show the similar properties with ionic liquids and have great attraction due to ease of preparation, low cost and environmentally friendly nature. They have many advantages such as reusability, stability, catalytically activity and removal of the reaction mixture. Deep eutectic solvents (DES) are composed hydrogen bond donor (HBD) and hydrogen bond acceptor (HBA). It has lower freezing point than that of individual constituents. In this study, p -toluene sulfonic acid (p-TSA) was used as HBD, benzyl tri-ethyl ammonium chloride (BTEAC) was used as HBA. DES formed by p-TSA and BTEAC was used as dual solvent-catalyst for esterification of benzoic acid with different alcohols. DES gave high catalytic activity among three different catalysts, 88.3, 87.8 and 67.5% conversion of benzoic acid for ethanol, butanol and hexanol, respectively. The effects of time, temperature, alcohol type and catalyst type were investigated in a batch reactor at specified conditions. It was found that DES provided the simple, efficient and environmentally friendly method for the synthesis of benzoic acid ester.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77909533","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

Genotoxic Effects of Aluminium Acetate by Micronucleus Assay 微核试验研究醋酸铝的遗传毒性作用

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-12-29 DOI: 10.18466/CBAYARFBE.319416

Y. Eren, D. Akyıl, Arzu Özkara

{"title":"Genotoxic Effects of Aluminium Acetate by Micronucleus Assay","authors":"Y. Eren, D. Akyıl, Arzu Özkara","doi":"10.18466/CBAYARFBE.319416","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.319416","url":null,"abstract":"Aluminium, the mostly used element in the world, and its usage is increasing in many applications. Aluminium acetate (AA) has been used in many therapeutical applications, too. Because of widely usage of AA in medicine, its safety must be clearly defined. This research evaluated the genotoxic effects of AA. It has been known that aluminium had very important toxic effect in long time exposures. It was aimed to determine if AA had same genotoxic effects or not. Genotoxic effects of AA were determined with human lymphocytes MN assay. Control, Negative control (1% DMSO), positive control (MMC, 0.20 µg/ml), 1250, 2500, 5000, 10000, and 15000 ppm doses of AA were used in this assay. MNBC % and NDI values of AA were compared with negative control group. 15000 ppm of AA were observed as EC50 concentration that reduced the mitotic index about 50 %. As a result of MNBC %, there was statistically significant increase in MN frequency at 5000 and 10000 ppm doses. Dose-dependent cytotoxicity were obtained from NDI study. The highest MN frequency and the lowest NDI frequency were obtained from 10000 ppm at 48 h treatment while the lowest MN and the highest NDI frequencies were determined in 1250 ppm at 24 h treatment. This research showed that used concentrations did not produce significant MN frequency but significantly reduced the NDI value when compared to MMC.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91454997","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

Web Proxy Log Data Mining System for Clustering Users and Search Keywords 面向用户聚类和关键词搜索的Web代理日志数据挖掘系统

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-12-29 DOI: 10.18466/cbayarfbe.330088

T. Bilgin, M. Aytekin

引用次数: 0

Modelled Excitation Functions of 112,114,116,118,120,122,124Sn Isotopes for an Incident Energy Range of 10-80 MeV 112,114,116,118,120,122,124Sn同位素在10-80 MeV入射能量范围内的模拟激发函数

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-12-29 DOI: 10.18466/cbayarfbe.370373

H. Büyükuslu

{"title":"Modelled Excitation Functions of 112,114,116,118,120,122,124Sn Isotopes for an Incident Energy Range of 10-80 MeV","authors":"H. Büyükuslu","doi":"10.18466/cbayarfbe.370373","DOIUrl":"https://doi.org/10.18466/cbayarfbe.370373","url":null,"abstract":"The data of the cross–section is required for understanding nuclear reaction mechanism, developing and testing validity of available nuclear reaction models as much as it has been used in the applied fields of nuclear physics. Reliable experimental data is importance of comparison with theoretical nuclear model calculations for testing predictive ability. In the event that experimental data failure appearance, theoretical models are filling this gab for supplying with calculated data. Because of these reasons, both of experimental and theoretical studies need of each other. For a long time, theoretically studies have been carried out for proton total reaction cross section calculation. At the end of these studies, several analytical equations have been proposed by their authors. Comparison of the suggested equations and rearrangement for different value of parameters are enormously important for reaching successfully results. In this study, proton total reaction cross sections have been calculated for 112,114,116,118,120,122,124 Sn isotopes using proton-nucleus interaction analytic equation that was proposed by M.A. Alvi. Also, optical model calculations carried out for same reactions by TALYS code. Excitation functions have been plotted with collected experimental data up to 80 MeV proton incident energy. Coefficient comparisons have been made via determined excitation function curves. The obtained results have been discussed by way of the excitation function graphics and compared with the available experimental data. Satisfactory agreements have been seen between calculated data and its measured equivalents. A validation of used theoretical model has been confirmed and tested via obtained results for these Sn isotopes and these energy ranges.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76817375","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

Structure, Spectroscopic and Quantum Chemical Investigations of 4-Amino-2-Methyl-8-(Trifluoromethyl)Quinoline 4-氨基-2-甲基-8-(三氟甲基)喹啉的结构、光谱和量子化学研究

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-12-29 DOI: 10.18466/CBAYARFBE.339858

T. R. Sertbakan

引用次数: 5

The Investigation of Strontium Adsorption using Zirconium-Antimony Oxide/Polyacrylonitrile Composite in Dynamic Systems 锆-氧化锑/聚丙烯腈复合材料动态吸附锶的研究

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-09-30 DOI: 10.18466/CBAYARFBE.339532

Süleyman İnan

{"title":"The Investigation of Strontium Adsorption using Zirconium-Antimony Oxide/Polyacrylonitrile Composite in Dynamic Systems","authors":"Süleyman İnan","doi":"10.18466/CBAYARFBE.339532","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.339532","url":null,"abstract":"Bu calismada, kolon kullanimina uygun yapida zirkonyum-antimon oksit/PAN kompozit kurecikleri sentezlenmistir. Sentezlenen kureciklerin stronsiyuma karsi adsorpsiyon davranislari dinamik kosullarda, kolon yontemi ile deneysel tasarim yaklasimi kullanilarak belirlenmistir. Akis hizi, baslangic derisimi ve yatak yuksekligi gibi temel parametrelerin stronsiyum adsorpsiyonu uzerindeki etkileri Box-Behnken Tasarimi kullanilarak incelenmistir. Stronsiyum alim denemeleri merkez noktalarda 3 tekrar ile 15 adet denemenin yurutulmesi ile gerceklestirilmistir. Ikili etkilesimler incelenerek soz konusu parametrelere bagimliligi gosteren cevap yuzey grafikleri olusturulmustur. Bagimsiz degiskenlerin regresyon analizi sonucunda R kare degerinin 0.995 olmasi, ongorulen degerler ile deneysel degerlerin %99.5 oraninda uyumlu oldugunu gostermektedir. Ayrica stronsiyum aliminda, akis hizi (P-degeri=3x10 -4 ), baslangic derisimi (P-degeri=2x10 -6 ), yatak yuksekligi (P-degeri=4x10 -5 ) parametreleri ile butun ikili etkilesimlerin istatistiksel olarak onemli oldugu bulunmustur. Maksimum adsorpsiyon kapasitesinin (11.00 mg.g -1 ), 0.20 mL.dak -1 akis hizinda, 100 mg.L -1 baslangic derisiminde ve 1 cm yatak yuksekliginde gerceklestigi tespit edilmistir. Zirkonyum-antimon oksit/PAN kureciklerinin stronsiyuma karsi breakthrough (kirilma) egrisi cizilip analiz edilerek, kolonun sizdirma (t b ) ve doyma noktasi (t s ) ile bu noktalardaki kapasiteleri q b ve q s hesaplanmistir. Kirilma egrisinin analizi sonucunda, sizdirma (t b ) ve doyma noktasi (t s ) sirasi ile 3125 ve 6400 dakika olarak bulunmus, bu noktalardaki sizdirma (q b ) ve doyma kapasitesi (q s ) ise sirasiyla 23.43 ve 47.98 mg.g -1 olarak hesaplanmistir.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84216039","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

Determination of Folic Acid by Ultra-High Performance Liquid Chromatography in Certain Malt-based Beverages after Solid-Phase Extraction 超高效液相色谱法测定某些麦芽饮料中叶酸的固相萃取

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-09-30 DOI: 10.18466/CBAYARFBE.339315

Elif Mine Öncü-Kaya

{"title":"Determination of Folic Acid by Ultra-High Performance Liquid Chromatography in Certain Malt-based Beverages after Solid-Phase Extraction","authors":"Elif Mine Öncü-Kaya","doi":"10.18466/CBAYARFBE.339315","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.339315","url":null,"abstract":"The aim of the present work was to develop and validate an efficient Ultra-High Performance Liquid Chromatography (UHPLC) method for the determination of folic acid (FA) in malt-based beverages. Solid-phase extraction (SPE) procedure was used for cleanup and preconcentration of the malt-based beverages before the UHPLC analysis. The analysis was performed in a C18 column (2.1x50 mmx1.8 µm) using a solvent system of ACN: 0.1 % formic acid in water (10:90, v/v) by isocratic elution. Injection volume was 5 µL. The flow rates of the mobile phase were maintained at 0.2 mL min ‒1 for 0.00–4.00 min and 0.5 mL min ‒1 for 4.01–12.00 min. Methyl paraben was used as the internal standard (IS). The FA and IS signals were detected at 284 nm and 254 nm, respectively. Under these conditions, FA and IS were separated in 3.6 min and 11.4 min, respectively. The method was successfully validated in terms of precision, accuracy, linearity, limits of detection (LOD) and quantification (LOQ) parameters. The relative standard deviations for intra- and inter-day precision were less than 1.5%. Good linearity with a high correlation coefficient was achieved over the concentration range of 20.13 µg L −1 – 2004 µg mL −1 for FA. The LOD and LOQ values were 6.66 µg L −1 and 20.13 µg L −1 , respectively . Good recovery values were found ranged between 99.1% and 106% for boza and vitamin fortified malt drink. The proposed method was successfully applied for the determination of FA in malt beers, vitamin fortified malt drinks and boza samples.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83031863","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

Convergence and Data Dependence Results for AK Iterative Algorithm AK迭代算法的收敛性和数据依赖性结果

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-09-30 DOI: 10.18466/CBAYARFBE.339352

Müzeyyen Ertürk

引用次数: 1

Usability of the Floor Heating Systems with Solar Energy in Ankara for a Cold Winter Day 安卡拉寒冷冬季太阳能地暖系统的可用性

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-09-30 DOI: 10.18466/CBAYARFBE.281369

Can Ekici

引用次数: 0

Sorption Characteristics of Cr(III) onto Florisil: Kinetics, Thermodynamics and Equilibrium Studies Cr(III)在Florisil上的吸附特性:动力学、热力学和平衡研究

Celal Bayar Universitesi Fen Bilimleri Dergisi Pub Date : 2017-09-30 DOI: 10.18466/CBAYARFBE.339318

Aslı Erdem Yayayürük, Onur Yayayürük

{"title":"Sorption Characteristics of Cr(III) onto Florisil: Kinetics, Thermodynamics and Equilibrium Studies","authors":"Aslı Erdem Yayayürük, Onur Yayayürük","doi":"10.18466/CBAYARFBE.339318","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.339318","url":null,"abstract":"In this study, the efficiency of florisil was investigated for the removal of Cr(III) using batch type sorption under different experimental conditions namely pH, sorbent amount, contact time and temperature. The maximum sorption capacity of florisil for Cr(III) ions was determined as 67.5 mg g -1 , at pH 6.0, with a contact time of 60.0 minutes at 25°C. The equilibrium kinetics, isotherms, and thermodynamics of Cr(III) ion sorption onto florisil were also studied and it was evaluated that the sorption kinetics of Cr(III) on florisil followed pseudo-second-order model. The equilibrium data were in good agreement with the Langmuir isotherm model indicating monolayer coverage on the sorbent surface. In addition, thermodynamic studies revealed that the sorption of Cr(III) onto florisil was spontaneous and exothermic. The presented method was applied to the determination of Cr(III) in ultra – pure, tap, bottled drinking and waste water samples and high recoveries obtained confirmed the accuracy of the proposed study. The overall results have demonstrated that florisil is a promising and efficient sorbent and a good candidate for the removal of Cr(III) from aqueous solutions.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83145059","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