Journal of Chemical Technology & Biotechnology最新文献_第4页

Ultrasonic Investigations of Molecular Interaction in Binary Mixtures of Cyclohexanone with Isomers of Butanol 环己酮与丁醇异构体二元混合物中分子相互作用的超声研究

Journal of Chemical Technology & Biotechnology Pub Date : 2014-12-18 DOI: 10.1155/2014/741795

S. Nayeem, M. Kondaiah, K. Sreekanth, D. Rao

{"title":"Ultrasonic Investigations of Molecular Interaction in Binary Mixtures of Cyclohexanone with Isomers of Butanol","authors":"S. Nayeem, M. Kondaiah, K. Sreekanth, D. Rao","doi":"10.1155/2014/741795","DOIUrl":"https://doi.org/10.1155/2014/741795","url":null,"abstract":"Ultrasonic speed, , and density, , have been measured in binary liquid mixtures of cyclohexanone with the isomers of butanol (-butanol, sec-butanol, and tert-butanol) at 308.15 K over the entire range of composition. Molar volume (), adiabatic compressibility (), intermolecular free length (), acoustic impedance (), and their excess/deviation along with have been calculated from the experimental data. These values have been fitted to Redlich-Kister type polynomial equation. Positive values of , , and negative values of , have been observed for all the liquid mixtures indicating the existence of weak interactions between components. Rupture of H-bond or reduction in H-bond strength of isomers of butanol or breaking of the structure of one or both of the components in a solution causes the existence of dispersions in the present investigated binary mixtures. The data obtained from , , and excess partial molar volumes , , reflects the inferences drawn from . Furthermore, FTIR spectra support the conclusions drawn from excess/deviation properties. The measured values of ultrasonic speed for all the investigated mixtures have been compared with the theoretically estimated values using empirical relations such as, Nomoto, Van Dael and Vangeels, Impedance and Rao specific sound speed.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"20 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81052649","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: 17

Kinetics and Thermodynamic Studies of Depolymerization of Nylon Waste by Hydrolysis Reaction 尼龙废料水解解聚动力学与热力学研究

Journal of Chemical Technology & Biotechnology Pub Date : 2014-12-08 DOI: 10.1155/2014/286709

D. Patil, S. V. Madhamshettiwar

引用次数: 16

Characterization of Native and Modified Starches by Potentiometric Titration 用电位滴定法表征天然淀粉和改性淀粉

Journal of Chemical Technology & Biotechnology Pub Date : 2014-12-03 DOI: 10.1155/2014/162480

Diana Soto, José Urdaneta, Kelly Pernia

引用次数: 12

Methods for Detection of Aflatoxins in Agricultural Food Crops 农业粮食作物中黄曲霉毒素的检测方法

Journal of Chemical Technology & Biotechnology Pub Date : 2014-11-13 DOI: 10.1155/2014/706291

Alex Paul Wacoo, Alex Paul Wacoo, D. Wendiro, P. Vuzi, J. Hawumba

{"title":"Methods for Detection of Aflatoxins in Agricultural Food Crops","authors":"Alex Paul Wacoo, Alex Paul Wacoo, D. Wendiro, P. Vuzi, J. Hawumba","doi":"10.1155/2014/706291","DOIUrl":"https://doi.org/10.1155/2014/706291","url":null,"abstract":"Aflatoxins are toxic carcinogenic secondary metabolites produced predominantly by two fungal species: Aspergillus flavus and Aspergillus parasiticus. These fungal species are contaminants of foodstuff as well as feeds and are responsible for aflatoxin contamination of these agro products. The toxicity and potency of aflatoxins make them the primary health hazard as well as responsible for losses associated with contaminations of processed foods and feeds. Determination of aflatoxins concentration in food stuff and feeds is thus very important. However, due to their low concentration in foods and feedstuff, analytical methods for detection and quantification of aflatoxins have to be specific, sensitive, and simple to carry out. Several methods including thin-layer chromatography (TLC), high-performance liquid chromatography (HPLC), mass spectroscopy, enzyme-linked immune-sorbent assay (ELISA), and electrochemical immunosensor, among others, have been described for detecting and quantifying aflatoxins in foods. Each of these methods has advantages and limitations in aflatoxins analysis. This review critically examines each of the methods used for detection of aflatoxins in foodstuff, highlighting the advantages and limitations of each method. Finally, a way forward for overcoming such obstacles is suggested.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"95 1","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74496899","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: 184

Studies on Mechanical, Thermal, and Morphological Properties of Glass Fibre Reinforced Polyoxymethylene Nanocomposite 玻璃纤维增强聚氧亚甲基纳米复合材料的力学、热学和形态性能研究

Journal of Chemical Technology & Biotechnology Pub Date : 2014-11-06 DOI: 10.1155/2014/782618

K. M. Babu, M. Mettilda

引用次数: 8

Visual Detection and Determination of Melamine Using Synthetic Dyes 合成染料对三聚氰胺的目视检测与测定

Journal of Chemical Technology & Biotechnology Pub Date : 2014-09-25 DOI: 10.1155/2014/457254

R. Narayan, Kirana Devarahosahally Veeranna

引用次数: 4

Averrhoa carambola: A Renewable Source of Oxalic Acid for the Facile and Green Synthesis of Divalent Metal (Fe, Co, Ni, Zn, and Cu) Oxalates and Oxide Nanoparticles 杨桃:一种可再生草酸来源，用于二价金属(Fe, Co, Ni, Zn和Cu)草酸盐和氧化物纳米颗粒的快速绿色合成

Journal of Chemical Technology & Biotechnology Pub Date : 2014-09-17 DOI: 10.1155/2014/767695

Nguimezong Nguefack Marius Borel, J. Foba-Tendo, D. M. Yufanyi, Ekane Peter Etape, Jude Namanga Eko, Lambi John Ngolui

引用次数: 12

Industrial Waste-Derived Nanoparticles and Microspheres Can Be Potent Antimicrobial and Functional Ingredients 工业废物衍生的纳米颗粒和微球可以成为有效的抗菌和功能性成分

Journal of Chemical Technology & Biotechnology Pub Date : 2014-09-17 DOI: 10.1155/2014/171427

M. Purkayastha, A. K. Manhar, M. Mandal, C. Mahanta

{"title":"Industrial Waste-Derived Nanoparticles and Microspheres Can Be Potent Antimicrobial and Functional Ingredients","authors":"M. Purkayastha, A. K. Manhar, M. Mandal, C. Mahanta","doi":"10.1155/2014/171427","DOIUrl":"https://doi.org/10.1155/2014/171427","url":null,"abstract":"Rapeseed oilcake or press-cake is generated as bulk waste during oil extraction from oilseeds. Owing to its high protein content, further processing of oilcakes into vegetable protein generates large quantities of fibrous residue (“oil-and-protein” spent meal) as by-product, which currently has very limited practical utility. Here, we report hydrothermal carbonization of this industrial waste to convert it into carbon nanoparticles, bestowed with multitude of functionalities. We demonstrate that these nanoparticles can be assembled into micrometer-sized spheres when precipitated from water by acetone. These microspheres, with their added feature of hemocompatibility, can be potentially utilized as an encapsulation vehicle for the protection of thermolabile compounds (such as protein); however, the secondary and tertiary features of the protein were marginally perturbed by the encapsulation process. The synthesized carbon nanoparticle was found to be an effective biocidal agent, exhibiting bacterial cellular damage and complex formation with the bacterial plasmid (evident from ethidium bromide exclusion assay), which are critical for cell survival. The results show the ability to convert industrial biowaste into useful nanomaterials for use in food industries and also suggest new scalable and simple approaches to improve environmental sustainability in industrial processes.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"9 1‐2","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2014-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91440361","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: 11

Bioavailability Studies of Metals in Surface Water of River Challawa, Nigeria 尼日利亚查拉瓦河地表水金属的生物利用度研究

Journal of Chemical Technology & Biotechnology Pub Date : 2014-09-15 DOI: 10.1155/2014/648453

A. Uzairu, .. O.J.Okunola, R. J. Wakawa, .. S.G.Adewusi

{"title":"Bioavailability Studies of Metals in Surface Water of River Challawa, Nigeria","authors":"A. Uzairu, .. O.J.Okunola, R. J. Wakawa, .. S.G.Adewusi","doi":"10.1155/2014/648453","DOIUrl":"https://doi.org/10.1155/2014/648453","url":null,"abstract":"Due to industrialization of Kano City, more industries located within Challawa industrial estate have discharged waste informed of effluents into River Challawa, which is the main source of irrigation water for agricultural land. Hence, this study is aim at assessing the bioavailable fractions of the metals zinc (Zn), lead (Pb), copper (Cu), chromium (Cr) and cadmium (Cd) in surface water of river Challawa, Kano, Nigeria, across seasons. It was found that the concentrations of most metals increased significantly during the dry seasons. Concentrations of Cu and Zn are within the standard limits of EPA and WHO for these metals in drinking water while Pb, Cr, and Cd have their concentrations higher than EPA and WHO standard limits. Analysis of relationship between metals indicated significant positive correlation () between Cr and Zn, in all seasons with exception of warm and dry season. This might explain the consistent variation of these metals in the sites in a particular season. Also, significant negative correlation was observed between Cd and Cu (hot and dry season). The chemical fractionation trends were found to be dominated by particulate fractions of metals studied except Zn (cool and dry season) and Cd. The highest percentages of all metals analysed were found in the particulate fraction with exception of Cd. This could reflect less availability of this metal to the immediate environment. However, availability of metals such as Cd, Cr, and Pb in the dissolved and mobile fractions reflects the greater tendency to become available to the aquatic system and through the food chain to man.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"412 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2014-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79952747","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: 18

Validation of a Serum Analysis Method to Analyze Antihistamines by Capillary Electrophoresis 毛细管电泳血清抗组胺分析方法的验证

Journal of Chemical Technology & Biotechnology Pub Date : 2014-08-25 DOI: 10.1155/2014/842519

J. Peris-Vicente, S. Carda‐Broch, J. Esteve-Romero

引用次数: 0