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Electron Donor-Acceptor Interaction of 8-Hydroxyquinoline with Citric Acid in Different Solvents: Spectroscopic Studies 8-羟基喹啉与柠檬酸在不同溶剂中的电子供体-受体相互作用:光谱研究
Journal of Chemical Technology & Biotechnology Pub Date : 2014-08-17 DOI: 10.1155/2014/484361
Demelash Jado, K. Siraj, Nathan Meka
{"title":"Electron Donor-Acceptor Interaction of 8-Hydroxyquinoline with Citric Acid in Different Solvents: Spectroscopic Studies","authors":"Demelash Jado, K. Siraj, Nathan Meka","doi":"10.1155/2014/484361","DOIUrl":"https://doi.org/10.1155/2014/484361","url":null,"abstract":"Charge transfer complex formation between 8-hydroxyquinoline as the electron donor and citric acid as the electron acceptor has been studied spectrophotometrically in ethanol and methanol solvents at room temperature. Absorption band due to charge transfer complex formation was observed near 320 and 325 nm in ethanol and methanol, respectively. The stoichiometric ratio of the complex has been found 3 : 1 by using Job’s and conductometric titration methods. Benesi-Hildebrand equation has been applied to estimate the formation constant and molecular extinction coefficient. It was found that the value of formation constant was larger in ethanol than in methanol. The physical parameters, ionization potential, and standard free energy change of the formed complex were determined and evaluated in the ethanol and methanol solvents.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"9 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87438222","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
Processing and Properties of Carbon Nanotube PVC Composites 碳纳米管聚氯乙烯复合材料的制备与性能
Journal of Chemical Technology & Biotechnology Pub Date : 2014-08-17 DOI: 10.1155/2014/307274
K. Trommer, C. Petzold, B. Morgenstern
{"title":"Processing and Properties of Carbon Nanotube PVC Composites","authors":"K. Trommer, C. Petzold, B. Morgenstern","doi":"10.1155/2014/307274","DOIUrl":"https://doi.org/10.1155/2014/307274","url":null,"abstract":"Commercially available multiwalled carbon nanotubes (MWCNT) were incorporated in coating masses based on PVC by means of three roll mill. The best results could be obtained using the 5 µm gap. Thin PVC sheets were formed via knife coating having an electrical conductivity up to 1,500 S/m that are applicable as electric heating elements. For the use in the antistatic range, CNT contents ≤0.5% are sufficient. Rheological measurements indicate the quality of particle processing. AFM investigations are suitable to investigate the alignment of the nanoparticles in the bulk polymer. Using this method, the decrease of agglomerates as well as the splitting of CNT bundles within further mass processing could be visualized.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"2014 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81914716","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
A Study of the Uptake of Heavy Metals by Plants near Metal-Scrap Dumpsite in Zaria, Nigeria 尼日利亚Zaria废金属垃圾场附近植物对重金属吸收的研究
Journal of Chemical Technology & Biotechnology Pub Date : 2014-08-12 DOI: 10.1155/2014/394650
Z. Yashim, Omoniyi K. Israel, M. Hannatu
{"title":"A Study of the Uptake of Heavy Metals by Plants near Metal-Scrap Dumpsite in Zaria, Nigeria","authors":"Z. Yashim, Omoniyi K. Israel, M. Hannatu","doi":"10.1155/2014/394650","DOIUrl":"https://doi.org/10.1155/2014/394650","url":null,"abstract":"The research work investigates the metal uptake of the plants Lycopersicon esculentum (tomato), Rumex acetosa (sorrel), and Solanum melongena (garden egg) collected from experimental sites and a control area in Zaria, Nigeria. The concentrations of Cd, Cu, Fe, Pb, Mn, and Zn in different parts of each of the plant species grown on the experimental and control soils were determined using atomic absorption spectrophotometry. The experimental levels of the metals were higher than those at the control site and the limits recommended by Food and Agricultural Organisation/World Health Organisation (FAO/WHO). Solanum melongena showed bioaccumulation factor (BF) and transfer factor (TF) greater than 1 for Cd, Pb, and Mn; Rumex acetosa showed BF and TF greater than 1 for Mn and Zn, and TF was greater than 1 for Cu and Fe; Lycopersicon esculentum had only the TF for Fe, Pb, Mn, and Zn greater than 1. This results implies that Solanum melongena and Rumex acetosa plants can be effectively used for phytoremediation of Cd, Pb, Mn, and Zn from the dumpsite. Pearson’s correlation coefficient values were greater than 0.75 for all the metals studied which indicated that the high metal level in the experimental soil was a result of the metal-scrap.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"2 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2014-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80533485","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: 28
Investigation of Regenerated Cellulose/Poly(acrylic acid) Composite Films for Potential Wound Healing Applications: A Preliminary Study 再生纤维素/聚丙烯酸复合膜在伤口愈合中的初步研究
Journal of Chemical Technology & Biotechnology Pub Date : 2014-05-06 DOI: 10.1155/2014/325627
M. Bajpai, S. Bajpai, D. Gautam
{"title":"Investigation of Regenerated Cellulose/Poly(acrylic acid) Composite Films for Potential Wound Healing Applications: A Preliminary Study","authors":"M. Bajpai, S. Bajpai, D. Gautam","doi":"10.1155/2014/325627","DOIUrl":"https://doi.org/10.1155/2014/325627","url":null,"abstract":"Regenerated cellulose/poly(acrylic acid) composite films have been synthesized for wound dressing applications. The water absorbency of these films was studied as a function of amount of cross-linker N,N′-methylenebisacrylamide and cellulose contents in the feed mixture. The samples, having different compositions, showed tensile strength and percent elongation in the range of to  N/m2 and 110 to 265, respectively. The water vapor transmission rate (WVTR) for various films was found to be in the range of 2.03 to 7.18 mg/cm2/h. These films were loaded with antibacterial drug miconazole nitrate and their release was studied in the physiological pH at 37°C. The release data was found to fit well the diffusion controlled Higuchi model. Finally the films demonstrated fair antibacterial and antifungal action, thus establishing their strong candidature as wound dressing materials.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"38 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80560491","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: 15
Benign Methodology and Efficient Catalysis for the One-Pot Multicomponent Synthesis of Dihydropyrimidinones and Thiones: A New Key for Old Lock 一锅多组分合成二氢嘧啶和硫酮的良性方法和高效催化:打开旧锁的新钥匙
Journal of Chemical Technology & Biotechnology Pub Date : 2014-04-09 DOI: 10.1155/2014/835758
Parvez S. Ali, Naziya Pathan, T. Hadda
{"title":"Benign Methodology and Efficient Catalysis for the One-Pot Multicomponent Synthesis of Dihydropyrimidinones and Thiones: A New Key for Old Lock","authors":"Parvez S. Ali, Naziya Pathan, T. Hadda","doi":"10.1155/2014/835758","DOIUrl":"https://doi.org/10.1155/2014/835758","url":null,"abstract":"In the present communication, under the influence of microwaves, cuprous chloride has been demonstrated to be safe, mild, efficient, and inexpensive catalyst for the Biginelli discovered multicomponent reaction (MCR) between aromatic aldehydes, urea/substituted urea, and ethyl acetoacetate to produce structurally diverse dihydropyrimidin-2(1H)-ones (DHPMs) and thiones in an ecofriendly solvent-free protocol. The practical and simple protocol led to excellent yields of the dihydropyrimidin-2(1H)-one derivatives under mild reaction conditions and within short span of reaction times with easy reaction workup by maintaining excellent atom economy.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"30 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2014-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82775714","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
Chalcogenide Thin Film Substrate for Protein Biochip Application 用于蛋白质生物芯片的硫属化物薄膜衬底
Journal of Chemical Technology & Biotechnology Pub Date : 2014-03-05 DOI: 10.1155/2014/152734
A. Tver’yanovich, A. Vasil’eva, A. Belykh, E. Borisov, Y. Tver’yanovich
{"title":"Chalcogenide Thin Film Substrate for Protein Biochip Application","authors":"A. Tver’yanovich, A. Vasil’eva, A. Belykh, E. Borisov, Y. Tver’yanovich","doi":"10.1155/2014/152734","DOIUrl":"https://doi.org/10.1155/2014/152734","url":null,"abstract":"Diagnostic of pathogen in the human biological liquids by biochip technology is an intensively developed methodic now. The main and the most important part of biochip is the adsorbing layer. Adsorption properties of chalcogenide films to protein (rat monoclonal antibodies) were tested. The films were prepared by conventional thermal deposition technique and by pulsed laser deposition technique. Two methods were used for forming in the films the two-dimensional map of adsorbing places for probe testing. One is using photoresist properties of chalcogenide films; another is using photo-induced oxidation of chalcogenide films. It was shown Good selectivity of the developed structures to protein markers was shown.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"6 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2014-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77878377","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
Synthesis of Triphenyltin (IV) and Dibutyltin (IV) Complexes of 1-Aryl-2,5-dithiohydrazodicarbonamides and Their Characterization 1-芳基-2,5-二硫腙二碳酰胺三苯基锡和二丁基锡配合物的合成及表征
Journal of Chemical Technology & Biotechnology Pub Date : 2014-03-05 DOI: 10.1155/2014/529764
R. Rastogi, K. Singh, V. Jaiswal
{"title":"Synthesis of Triphenyltin (IV) and Dibutyltin (IV) Complexes of 1-Aryl-2,5-dithiohydrazodicarbonamides and Their Characterization","authors":"R. Rastogi, K. Singh, V. Jaiswal","doi":"10.1155/2014/529764","DOIUrl":"https://doi.org/10.1155/2014/529764","url":null,"abstract":"Organotin complexes of the types Ph3SnL and Bu2SnL [where Ph = phenyl and Bu = butyl; HL = 1-phenyl-2,5-dithiohydrazodicarbonamide (HPhthc), 1-benzyl-2,5-dithiohydrazodicarbonamide (Hbzthc), 1-(4-ethoxyphenyl)-2,5-dithiohydrazodicarbonamide (HEtOPhthc)] have been prepared. Molar conductance studies demonstrate the nonionic behavior of the complexes. The 1H and 13C nuclear magnetic resonance and FAB mass spectra of the complexes are consistent with the proposed stoichiometry. Infrared spectra suggest an anionic bidentate coordinating behavior of the ligands.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"227 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2014-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77435956","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
Measurement and Correlation for Solubility of Some Pyrimidine Derivatives in Different Solvents 一些嘧啶衍生物在不同溶剂中的溶解度测定及相关性研究
Journal of Chemical Technology & Biotechnology Pub Date : 2014-03-03 DOI: 10.1155/2014/450294
K. Bhesaniya, S. Baluja
{"title":"Measurement and Correlation for Solubility of Some Pyrimidine Derivatives in Different Solvents","authors":"K. Bhesaniya, S. Baluja","doi":"10.1155/2014/450294","DOIUrl":"https://doi.org/10.1155/2014/450294","url":null,"abstract":"Some new pyrimidine derivatives have been synthesized and their characterization was done by IR, NMR, and mass spectral data. The solubility of these synthesized compounds has been studied in methanol, N,N dimethylformamide (DMF), and carbon tetrachloride (CCl4) by gravimetrical method from 298.15 to 328.15 K under atmospheric pressure and the solubility data were correlated against temperature. The solubility is found to increase with temperature and order of solubility is DMF > methanol > CCl4. The experimental solubility data is correlated with the modified Apelblat equation. Some thermodynamic parameters such as dissolution enthalpy, Gibbs energy of dissolution, and entropy of mixing have also been calculated.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"24 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75424848","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
Polyaniline/Palm Oil Blend for Anticorrosion of Mild Steel in Saline Environment 聚苯胺/棕榈油共混物用于低碳钢在盐水环境中的防腐
Journal of Chemical Technology & Biotechnology Pub Date : 2014-02-17 DOI: 10.1155/2014/973653
M. Rashid, S. Sabir, A. A. Rahim, U. Waware
{"title":"Polyaniline/Palm Oil Blend for Anticorrosion of Mild Steel in Saline Environment","authors":"M. Rashid, S. Sabir, A. A. Rahim, U. Waware","doi":"10.1155/2014/973653","DOIUrl":"https://doi.org/10.1155/2014/973653","url":null,"abstract":"The corrosion protective performance of polyaniline/palm oil (PAni-PO) blend coated on mild steel in 3% NaCl aqueous solutions has been evaluated by electrochemical methods, namely, open circuit potential (ocp), potentiodynamic polarization, and EIS spectroscopy. The surface of mild steel was covered by a dark green protective layer due to the physical interaction between the coating and steel. The permanent shifts of ocp and potentiodynamic polarization towards higher positive value of oxidation potential by about 800 mV and by a decrease in corrosion current density by sixfold in magnitude and an increase of 10 orders of magnitude in charge transfer resistance are due to protective coating.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"126 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2014-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76389688","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
Determination of Heavy Metals and Nutrients in Rivers Naka and Irigu, Chuka, (Kenya) Using Atomic Absorption Spectrometry and UV/Visible Spectrophotometry 原子吸收光谱-紫外/可见分光光度法测定肯尼亚Chuka Naka河和Irigu河中重金属和营养物质
Journal of Chemical Technology & Biotechnology Pub Date : 2014-01-01 DOI: 10.9790/5736-071118288
J. Mutembei, A. Salim, O. A. onditi, W. Waudo, A. O. Yusuf
{"title":"Determination of Heavy Metals and Nutrients in Rivers Naka and Irigu, Chuka, (Kenya) Using Atomic Absorption Spectrometry and UV/Visible Spectrophotometry","authors":"J. Mutembei, A. Salim, O. A. onditi, W. Waudo, A. O. Yusuf","doi":"10.9790/5736-071118288","DOIUrl":"https://doi.org/10.9790/5736-071118288","url":null,"abstract":"Levels of concentration of heavy metals (lead, cadmium, arsenic and mercury) and nutrients in rivers Naka and Irigu were determined in the first three months (January, February and March, 2013) and variation downstream compared. Lead and cadmium were determined using Atomic Absorption Spectroscopy (AAS). Hydride generation method was used to determine concentration of arsenic while that of mercury was determined using cold vapour technique. Calorimetric methods were used to determine levels of nitrates and phosphates. Concentration levels of lead, cadmium and arsenic were found to be beyond the permissible levels stipulated by National Environment Management Authority (NEMA) and World Health Organisation (WHO) drinking water specifications. Lead had the highest concentration with a range of 0.0537±0.103 parts per million (ppm) to 0.765±0.782 ppm followed by cadmium with a concentration range of 0.035 ± 0.006ppm to 0.24±0.0084 ppm in both rivers Naka and Irigu. The high concentration levels of lead in River Naka could be attributed to disposal of wastes directly into the river from Chuka Town due to poor drainage systems. Mercury was found to be below the detection limit. On the other hand, phosphate had a concentration range of 8.31±0.429 ppm to 10.33±0.189 ppm. This was above the specified level of 2.2ppm in drinking water according to NEMA. Only nitrate was below the recommended levels of 50 ppm and 45 ppm NEMA and WHO guidelines respectively for drinking water.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"56 1","pages":"82-88"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75973570","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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