E-journal of Chemistry最新文献_第8页

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/961585

S. Udhayavani, K. Subramani

引用次数: 0

Equilibrium and Kinetics Study of Adsorption of Crystal Violet onto the Peel of Cucumis sativa Fruit from Aqueous Solution 紫晶在黄瓜果皮上吸附的平衡及动力学研究

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/457632

T. Smitha, S. Thirumalisamy, S. Manonmani

{"title":"Equilibrium and Kinetics Study of Adsorption of Crystal Violet onto the Peel of Cucumis sativa Fruit from Aqueous Solution","authors":"T. Smitha, S. Thirumalisamy, S. Manonmani","doi":"10.1155/2012/457632","DOIUrl":"https://doi.org/10.1155/2012/457632","url":null,"abstract":"The use of low-cost, locally available, high efficiency and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. This study investigates the potential use of the peel of Cucumis sativa fruit for the removal of crystal violet (CV) dye from simulated wastewater. The effects of different system variables, adsorbent dosage, initial dye concentration, pH and contact time were investigated and optimal experimental conditions were ascertained. The results showed that as the amount of the adsorbent increased, the percentage of dye removal increased accordingly. Optimum pH value for dye adsorption was determined as 7.0. The adsorption of crystal violet followed pseudo-second order rate equation and fit well Langmuir and Freundlich equations. The maximum removal of CV was obtained at pH 7 as 92.15% for adsorbent dose of 0.2 g/50 mL and 25 mg L-1 initial dye concentration at room temperature. The maximum adsorption capacity obtained from Langmuir equation was 34.24 mg g-1. Furthermore, adsorption kinetics of (CV) was studied and the rate of adsorption was found to conform to pseudo-second order kinetics with a good correlation (R2 > 0.9739). The peel of Cucumis sativa fruit can be attractive options for dye removal from diluted industrial effluents since test reaction made on simulated dyeing wastewater show better removal percentage of (CV).","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/457632","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64323519","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: 23

Syntheses, Characterization, and Antimicrobial Screening of N-(benzothiazol-2-yl)benzenesulphonamide and its Cu(I), Ni(II), Mn(II), Co(II), and Zn(II) Complexes N-(苯并噻唑-2-酰基)苯磺酰胺及其Cu(I)、Ni(II)、Mn(II)、Co(II)和Zn(II)配合物的合成、表征和抗菌筛选

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/496541

N. Obasi, O. Benedict, P. Ukoha, A. Anaga

{"title":"Syntheses, Characterization, and Antimicrobial Screening of N-(benzothiazol-2-yl)benzenesulphonamide and its Cu(I), Ni(II), Mn(II), Co(II), and Zn(II) Complexes","authors":"N. Obasi, O. Benedict, P. Ukoha, A. Anaga","doi":"10.1155/2012/496541","DOIUrl":"https://doi.org/10.1155/2012/496541","url":null,"abstract":"N-(benzothiazol-2-yl)benzenesulphonamide (BS2ABT) was synthesized by the condensation (by refluxing) of 2-aminobenzothiazole and benzenesulphonylchloride in acetone at 140oC. The resulting crude precipitates were recrystallized from dimethylformamide (DMF). Five metal complexes of copper(I), nickel(II), manganese(II), cobalt(II) and zinc(II) of the ligands were synthesized. The compounds were characterized using magnetic susceptibility measurements, UV/VIS spectrophotometry, infra red, proton and 13C nmr spectroscopies. The antimicrobial tests of the ligands and its metal complexes were carried out on both multi-resistant bacterial strains isolated under clinical conditions and cultured species using agar-well diffusion method. The multi-resistant bacterial strains used were Escherichia coli, Proteus species, Pseudomonas aeroginosa and Staphylococcus aureus which were isolated from dogs. The culture species were Pseudomonas aeruginosa (ATCC 27853), Escherichia Coli (ATCC 25922) Staphylococcus aureus (ATCC 25923), and the fungi, Candida krusei (ATCC 6258) and Candida albicans (ATCC 90028). The tests were both in vitro and in vivo. Thus the Inhibition Zone Diameter (IZD), the Minimum Inhibitory Concentration (MIC), and the Lethal and Effective Concentrations (LC50 and EC50) were determined. The antimicrobial activities of the compounds were compared with those of Ciprofloxacin and trimethoprim-sulphamethoxazole as antibacterial agents and Fluconazole as an antifungal drug. All the compounds showed varying activities against the cultured typed bacteria and fungi used. However, they were less active than the standard drugs used except Fluconazole which did not show any activity against Candida krusei (ATCC 6258) but most of the compounds synthesized were very active against it. The Lethal Concentration (LC50) ranged from 26.25±4.9-1833.88±186.92 ppm. These are within the permissible concentrations.","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/496541","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64327537","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

RP-HPLC Estimation of Trospium Chloride in Tablet Dosage Forms 反相高效液相色谱法测定片剂中Trospium的含量

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/502125

M. Lakshmi, J. Rao, A. Rao

引用次数: 5

Polymer Composite—A Potential Biomaterial for the Removal of Reactive Dye 高分子复合材料——去除活性染料的潜在生物材料

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/518581

P. N. Palanisamy, A. Agalya, P. Sivakumar

{"title":"Polymer Composite—A Potential Biomaterial for the Removal of Reactive Dye","authors":"P. N. Palanisamy, A. Agalya, P. Sivakumar","doi":"10.1155/2012/518581","DOIUrl":"https://doi.org/10.1155/2012/518581","url":null,"abstract":"Poly Pyrrle saw dust composite was prepared by reinforcement of natural wood saw dust (obtained from Euphorbia Tirucalli L wood) and Poly Pyrrole matrix phase. The present study investigates the adsorption behaviour of Poly Pyrrole Saw dust Composite towards reactive dye. The batch adsorption studies were carried out by varying solution pH, initial dye concentration, contact time and temperature. The kinetic study showed that adsorption of Reactive Red by PPC was best represented by pseudo-second order kinetics with ion exchange adsorption. The equilibrium data were analyzed by Freundlich and Langmuir isotherm model. The equilibrium isotherm data were fitted well with Langmuir isotherm model. The maximum monolayer adsorption capacities calculated by Langmuir model were 204.08 mg/g for Reactive Red at 303 K. The thermodynamic parameters suggest the spontaneous, endothermic nature of ion exchange adsorption with weak Vader walls force of attraction. Activation energy for the adsorption of Reactive by Poly Pyrrole Composite was 11.6387 kJ/mole, Isosteric Heat of adsorption was 48.5454 kJ/mole also supported the ion exchange adsorption process in which forces of attraction between dye molecules and PPC is weak.","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/518581","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64329809","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: 30

Stability-Indicating RP-HPLC Method for Analysis of Paracetamol and Tramadol in a Pharmaceutical Dosage Form 稳定性指示反相高效液相色谱法分析药品剂型中对乙酰氨基酚和曲马多

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/732506

R. Kamble, S. Singh

{"title":"Stability-Indicating RP-HPLC Method for Analysis of Paracetamol and Tramadol in a Pharmaceutical Dosage Form","authors":"R. Kamble, S. Singh","doi":"10.1155/2012/732506","DOIUrl":"https://doi.org/10.1155/2012/732506","url":null,"abstract":"A simple, isocratic, rapid and accurate reversed phase high performance liquid chromatography method was developed for the quantitative determination of paracetamol and tramadol in commercial medicinal tablets. The chromatographic separation was achieved on an Intersil C18 (250 mm x 4.6 mm, 5μm) column using water pH 3.4 with orthophosphoric acid: methanol (60:40, v/v) as a mobile phase, and UV detection at 228 nm. The chromatographic resolutions between paracetamol and tramadol were found greater than five. The linear range for paracetamol and tramadol were 20.8–39.0 μg/ml and 2.4–4.5 μg/ ml was obtained with correlation coefficients ≥0.999 for each analyte. The retention time were found to be 2.1 and 3.9 min for tramadol and paracetamol respectively. Paracetamol and tramadol was subjected to stress conditions (hydrolysis (acid, base) oxidation, photolysis and thermal degradation) and the stressed samples were analyzed by use of the method. The major degradation was observed in acid and minor in base, thermal, oxidation and photolysis. The forced degradation studies prove the stability indicating power of the method.","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/732506","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64348133","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: 30

Synthesis of Activated Carbon Mesoporous from Coffee Waste and Its Application in Adsorption Zinc and Mercury Ions from Aqueous Solution 咖啡渣合成介孔活性炭及其吸附水溶液中锌和汞离子的研究

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/120763

L. Giraldo, J. Moreno-Piraján

引用次数: 58

Synthesis of Novel N1 and N2 Indazole Derivatives 新型N1和N2吲哚唑衍生物的合成

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/165784

Prasanna Bethanamudi, Srinivasulu Bandari, K. Sankari, Amarnath Velidandi, G. Chandramouli

引用次数: 5

Synthesis and Characterization of Azo Dye Para Red and New Derivatives 偶氮染料对红及其新衍生物的合成与表征

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/206076

L. A. R. Al-Rubaie, R. J. Mhessn