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Interionic interactions of Nickle Sulphate in Aqueous and Aqueous Methanol Mixtures 硫酸镍在水溶液和水溶液甲醇混合物中的离子间相互作用
Pakistan Journal of Chemistry Pub Date : 2018-02-10 DOI: 10.15228/2018.v08.i01-2.p01
S. Masood, R. Saeed, Maria Ashfaqa, S. Perveen
{"title":"Interionic interactions of Nickle Sulphate in Aqueous and Aqueous Methanol Mixtures","authors":"S. Masood, R. Saeed, Maria Ashfaqa, S. Perveen","doi":"10.15228/2018.v08.i01-2.p01","DOIUrl":"https://doi.org/10.15228/2018.v08.i01-2.p01","url":null,"abstract":"Densities of divalent transition metal sulphate, viz. nickel sulphate (NiSO4), were measured in aqueous and aqueous methanol mixtures (10% to 40% v/v) within concentration range (1x10 to 10x10 mol.dm) at different temperatures (298 to 323 K). The acquired data have been analyzed by using the Masson equation for ascertaining apparent molar volume (φv), partial molar volumes (∅v ° ) and experimental slopes (Sv). The obtained results are interpreted in terms of the ion-ion interaction and ion-solvent interactions. Structure making/breaking capacities of electrolytes have been incidental from the Hepler’s criterion i.e. ∂∅v ° ∂T2 P second derivative of partial molar volume with respect to temperature at constant pressure. Results showed that NiSO4 in aqueous and aqueous methanol mixtures ranging from 10% to 40% v/v act as structure breaker.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"118 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2018-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87631480","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
Natural substrates for extracellular lipase production from Pseudomonas aeruginosa HE05 isolated from diesel oil contaminated soil 柴油污染土壤中铜绿假单胞菌HE05产胞外脂肪酶的天然底物
Pakistan Journal of Chemistry Pub Date : 2017-12-05 DOI: 10.15228/2017.V07.I01-4.P05
Erum Hanif, Amna Sajid, Komal Talat, S. Hassan
{"title":"Natural substrates for extracellular lipase production from Pseudomonas aeruginosa HE05 isolated from diesel oil contaminated soil","authors":"Erum Hanif, Amna Sajid, Komal Talat, S. Hassan","doi":"10.15228/2017.V07.I01-4.P05","DOIUrl":"https://doi.org/10.15228/2017.V07.I01-4.P05","url":null,"abstract":"The present work focused on the production of extracellular lipase from Pseudomonas aeruginosa HE05 emplying natural oils of plants as substrat. Nine isolates (HE01-HE09) were isolated from the desiel oil contaminated soil and screened for lipase activity on nutrient agar medium supplemented with 1% olive oil and tween 80. Pseudomonas aeruginosa HE05 was identified as the hyperproducer of lipase. Maximum lipase production (3123U/ml) was recorded when 1% olive oil and 1% tween 80 added in nutrient broth used as a substrate in submerged fermentation. The optimal production was achevied in 96 hrs at 37C at 100 rpm. Quantification of lipase units were performed by turbidimetric assay. Supplementation of nutrient broth with natural oils was found as inducer as well as substrate for the production of lipase. Among the natural oils, mustard oil, corn oil, almond oil are better substrate for extracellular lipase production.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"1 1","pages":"20"},"PeriodicalIF":0.0,"publicationDate":"2017-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88217677","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
Effect of Temperature and Evaluation of Thermodynamic Parameters for Ag(I) Catalyzed Oxidation of Tris (2, 2´-bipyridine)Fe(II)complex ion by peroxodisulfate 过硫酸氢盐催化氧化三(2,2′-联吡啶)铁(II)配合物离子的温度影响及热力学参数评价
Pakistan Journal of Chemistry Pub Date : 2017-09-25 DOI: 10.15228/2017.V07.I01-4.P04
S. Summer, S. Ansari, I. Naqvi
{"title":"Effect of Temperature and Evaluation of Thermodynamic Parameters for Ag(I) Catalyzed Oxidation of Tris (2, 2´-bipyridine)Fe(II)complex ion by peroxodisulfate","authors":"S. Summer, S. Ansari, I. Naqvi","doi":"10.15228/2017.V07.I01-4.P04","DOIUrl":"https://doi.org/10.15228/2017.V07.I01-4.P04","url":null,"abstract":"Ag(I) catalyzed oxidation of tris(2,2’-bipyridine)Fe(II) complex ion by peroxodisulfate has been undertaken at different temperatures (20°C-40°C). Redox reaction was investigated at different temperatures to evaluate the thermodynamic parameters of activation ΔH # , ΔS # and ΔG # . The value of energy of activation (Ea) of the redox reaction was estimated from Arrhenius plot and found to be 18.316±0.21 kJ/mol. The values of thermodynamic parameters of activation such as enthalpy of activation (ΔH # ) and entropy of activation (ΔS # ) were consequently evaluated from Eyring plot. The Gibbs energy of activation (ΔG # ) was calculated by employing equation, ΔG # = ΔH # − TΔS # . These values have been estimated with standard deviation to be as ∆H # =15.92±0.42 kJ/mol, and ∆S # = -73.85±1.97 J/mol.K and ΔG # = 37.93± 0.78 kJ/mol at 298K. The positive values of ∆H # and ∆G # recommend the redox reaction to be an endothermic reaction.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"3 1","pages":"17"},"PeriodicalIF":0.0,"publicationDate":"2017-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88205621","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
Heavy Metal Resistant Bacteria: A Potential Candidate for Bioremediation 重金属抗性细菌:生物修复的潜在候选者
Pakistan Journal of Chemistry Pub Date : 2017-06-15 DOI: 10.15228/2017.v07.i01-4.p03
S. Hassan, Erum Hanif, A. Siddiqui, E. Asif, U. Khan, A. Tanoli
{"title":"Heavy Metal Resistant Bacteria: A Potential Candidate for Bioremediation","authors":"S. Hassan, Erum Hanif, A. Siddiqui, E. Asif, U. Khan, A. Tanoli","doi":"10.15228/2017.v07.i01-4.p03","DOIUrl":"https://doi.org/10.15228/2017.v07.i01-4.p03","url":null,"abstract":"Microorganisms have numerous biotechnological applications for bioremediation of metal-contaminated soil and water systems. In view of this, the present study was aimed to evaluate the abilities of microorganisms for tolerance and biosorption of heavy metals. In this study we have isolated 30 different bacterial strains from soil. Morphological and biochemical characterization was carried out. It was shown that Pseudomonas sp. was most common isolate among heavy metal resistant organisms that are capable of resisting 5 heavy metals (Ni, Pb, Cr, Cu and Cd) of concentration range 50-300μg/ml. Among 30 isolates, 4 of them showed high degree of resistance against all metals at concentration at 300μg/ml. Bacterial strains isolated in this study can be used in bioremediation and bio-mining.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"48 1","pages":"12"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73597345","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 Fluoride Content in Tea Infusions Sold in Karachi Using Fluoride Ion Selective Electrode 用氟离子选择电极测定卡拉奇市售茶叶中氟含量
Pakistan Journal of Chemistry Pub Date : 2017-04-10 DOI: 10.15228/2017.v07.i01-4.p02
Zia ul Arefin, T. Ahmed, S. Imran, M. A. Tanoli, Z. Khan
{"title":"Determination of Fluoride Content in Tea Infusions Sold in Karachi Using Fluoride Ion Selective Electrode","authors":"Zia ul Arefin, T. Ahmed, S. Imran, M. A. Tanoli, Z. Khan","doi":"10.15228/2017.v07.i01-4.p02","DOIUrl":"https://doi.org/10.15228/2017.v07.i01-4.p02","url":null,"abstract":"","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"117 1","pages":"8"},"PeriodicalIF":0.0,"publicationDate":"2017-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73545140","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
Decolorization of Some Reactive Dyes Using Vegetable Extract 植物提取物对活性染料的脱色研究
Pakistan Journal of Chemistry Pub Date : 2017-02-27 DOI: 10.15228/2017.V07.I01-4.P01
Anila Sameer, Saeed U. Khan, T. Ahmed, H. Ahmed, A. Tanoli, A. Khan
{"title":"Decolorization of Some Reactive Dyes Using Vegetable Extract","authors":"Anila Sameer, Saeed U. Khan, T. Ahmed, H. Ahmed, A. Tanoli, A. Khan","doi":"10.15228/2017.V07.I01-4.P01","DOIUrl":"https://doi.org/10.15228/2017.V07.I01-4.P01","url":null,"abstract":"In this present study, an attempt was made to use the watery extract of most commonly use vegetables; onion (Allium cepa.L), potato (Solanum tuberosum) and garlic (Allium sativum) for the treatment of selected azo dyes. The selected azo-reactive dyes i.e. Jakofix-G yellow, Sumifix orange and Drimarene yellow are commonly used textile dyes. The vegetables extracts were made in the different ratio (v:v) for decolorization of these dyes. The reduction in the absorbance value of λmax of these dyes indicates the decolorization. The color removal efficiency was calculated using change in the absorbance. It has been noted that garlic extract was able to decolorize dyes in high proportion as compared to onion and potato peel extract. All the color removal activity was done at the physiological pH of the selected vegetables. Furthermore, to uncover the nature of these reactive dyes, the solvatochromic behavior of the dyes were studies using solvent of different polarities.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"1 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2017-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90977856","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
Ruthenium azo complexes: Synthesis, spectra and electrochemistry of dithiocyanato-bis-{1-(alkyl)-2-(arylazo)imidazole}ruthenium(II) 钌偶氮配合物:二硫氰酸酯-双-{1-(烷基)-2-(芳偶氮)咪唑}钌(II)的合成、光谱和电化学
Pakistan Journal of Chemistry Pub Date : 2015-03-30 DOI: 10.15228/2015.v05.i01.p06
P. Byabartta
{"title":"Ruthenium azo complexes: Synthesis, spectra and electrochemistry of dithiocyanato-bis-{1-(alkyl)-2-(arylazo)imidazole}ruthenium(II)","authors":"P. Byabartta","doi":"10.15228/2015.v05.i01.p06","DOIUrl":"https://doi.org/10.15228/2015.v05.i01.p06","url":null,"abstract":"","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"12 1","pages":"36-41"},"PeriodicalIF":0.0,"publicationDate":"2015-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89232475","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
Synthetic N-Alkyl/aralkyl-4-methyl-N-(naphthalen-1-yl)benzenesulfonamides as Potent Antibacterial Agents 合成n-烷基/芳烷基-4-甲基- n-(萘-1-基)苯磺酰胺作为高效抗菌剂
Pakistan Journal of Chemistry Pub Date : 2015-03-30 DOI: 10.15228/2015.V05.I01.P04
M. Abbasi, S. Manzoor, Aziz‐ur‐Rehman, S. Z. Siddiqui, I. Ahmad, R. Malik, M. Ashraf, Qurat-ul-ain, S. Shah
{"title":"Synthetic N-Alkyl/aralkyl-4-methyl-N-(naphthalen-1-yl)benzenesulfonamides as Potent Antibacterial Agents","authors":"M. Abbasi, S. Manzoor, Aziz‐ur‐Rehman, S. Z. Siddiqui, I. Ahmad, R. Malik, M. Ashraf, Qurat-ul-ain, S. Shah","doi":"10.15228/2015.V05.I01.P04","DOIUrl":"https://doi.org/10.15228/2015.V05.I01.P04","url":null,"abstract":"The current research effort involved the reaction of napthalen-1-amine (1) with 4-methylbenzenesulfonyl chloride (2) under dynamic pH control at 9-10, maintained with 10% aqueous Na2CO3 to obtain 4-methyl-N-(naphthalen-1-yl) benzenesulfonamide (3). The parent molecule 3 was further substituted at N-atom with alkyl/aralkyl halides (4a-f) in polar aprotic solvent; N,Ndimethylformamide, and lithium hydride which acts as a base, to achieve N-alkyl/aralkyl-4-methyl-N-(naphthalen-1yl)benzenesulfonamides (5a-f). All the synthesized compounds were structurally elucidated by IR, H-NMR and EIMS spectral techniques. All the derivatives were further screened for antibacterial and anti-enzymatic potential against various bacterial strains and enzymes, respectively, and were found to be potent antibacterial agents and moderate to weak enzyme inhibitors.","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"22 1","pages":"23-29"},"PeriodicalIF":0.0,"publicationDate":"2015-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84434218","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
The Factors Effecting the Formation of Curcumin-Al (III) Complexes 影响姜黄素- al (III)配合物形成的因素
Pakistan Journal of Chemistry Pub Date : 2015-03-30 DOI: 10.15228/2015.v05.i01.p05
A. M. Rawa'a, N. Tariq, S. Wisam
{"title":"The Factors Effecting the Formation of Curcumin-Al (III) Complexes","authors":"A. M. Rawa'a, N. Tariq, S. Wisam","doi":"10.15228/2015.v05.i01.p05","DOIUrl":"https://doi.org/10.15228/2015.v05.i01.p05","url":null,"abstract":"Curcumin has been recognized as a potential natural drug to treat the Alzheimer’s disease (AD) by chelating metal ions. In the present paper, curcumin–Al (III) [Cur - Al (III)] complexes were synthesized in aqueous solution and characterized by UV-visible spectroscopy. The formation of complexes between Al (III) and curcumin in acidic condition, by using citric acid as catalyst were studied. The complex molar ratio [Cur - Al (III] was found to be 2:1 in buffer phosphate of pH 1.0, 1.5, 2.0, 3.0, 3.5 and 4.0. The optimum pH for the complex [Cur - Al (III)] formation was at phosphate buffer of pH=2.5, at this pH the complex [Cur. - Al (III)] was more stable than the other pH values (throughout the absorbance calculation at 531nm). About 92% of Al (III) was chelated by curcumin at pH 2.5 as compared with 1.0, 1.5, 2.0, 3.0, 3.5 and 4.0 pH values. Curcumin complexes (at pH 2.5) were thermally stable at 100 o C as compared with 75, 50 and 25 o C respectively. The chemical shifts of spectrum shows that the curcumin was","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"32 1","pages":"30-35"},"PeriodicalIF":0.0,"publicationDate":"2015-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83179520","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
Comparative Kinetic and Mechanistic study of oxidation of B-Cyclodextrin by Potassium Dichromate 重铬酸钾氧化b -环糊精的动力学和机理比较研究
Pakistan Journal of Chemistry Pub Date : 2015-03-30 DOI: 10.15228/2015.V05.I01.P01
R. Naz, R. Azmat, N. Qamar, H. Jaffery, S. Nisar
{"title":"Comparative Kinetic and Mechanistic study of oxidation of B-Cyclodextrin by Potassium Dichromate","authors":"R. Naz, R. Azmat, N. Qamar, H. Jaffery, S. Nisar","doi":"10.15228/2015.V05.I01.P01","DOIUrl":"https://doi.org/10.15228/2015.V05.I01.P01","url":null,"abstract":"*1 R. Naz, 1 R. Azmat, 2 N. Qamar, 1 H. Jaffery and 1 S. Nisar *1 Department of Chemistry, University of Karachi, 75270, Karachi, Pakistan. 2 Department of Chemistry, Jinnah University for Women, 74600 Karachi, Pakistan E-mail: * drr.nazz@gmail.com ABSTRACT A comparative kinetic and mechanistic study of oxidation of β-Cyclodextrin (β-CD) by Potassium Dichromate (K2Cr2O7) in presence of aqueous H2SO4 medium was monitored at λmax 350 nm spectrophotometrically. The oxidation reaction follows first order kinetics with respect to [β-CD] and [Cr2O7 ] and markedly increased by increasing [H]. The slow reaction was accelerated with Fe (III) as a catalyst that enhances the rate significantly. The results of varying temperature were used to compute different activation parameters. The values of activation energy Ea were 37.70KJ mol -1 for catalysed and 50.183 KJ molfor uncatalysed reactions. These clearly indicate that Fe (III) greatly reduced the activation barrier thereby increases the rate of reaction. Oxidation product results due to the oxidation of -CH2OH group present on each glucose monomer of β-CD.A mechanism consistent with kinetic and thermodynamic data is also proposed that involves two-electron reduction of Cr (VI).","PeriodicalId":19815,"journal":{"name":"Pakistan Journal of Chemistry","volume":"76 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2015-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73857292","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
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