Journal of Chemical Technology & Biotechnology最新文献_第3页

Identification and Optimisation of Lipase-Catalysed Synthesis of Betulinic Acid Amide in a Solvent System 脂肪酶催化溶剂体系合成白桦酸酰胺的鉴定与优化

Journal of Chemical Technology & Biotechnology Pub Date : 2016-07-17 DOI: 10.1155/2016/5149326

N. Yusof, Nursyamsyila Mat Hadzir, Siti Efliza Ashari

引用次数: 3

Improved Biodegradable Radiation Cured Polymeric Film Prepared from Chitosan-Gelatin Blend 壳聚糖-明胶共混物制备改进的可生物降解辐射固化聚合物膜

Journal of Chemical Technology & Biotechnology Pub Date : 2016-02-22 DOI: 10.1155/2016/5373670

Z. Nasreen, M. A. Khan, A. Mustafa

{"title":"Improved Biodegradable Radiation Cured Polymeric Film Prepared from Chitosan-Gelatin Blend","authors":"Z. Nasreen, M. A. Khan, A. Mustafa","doi":"10.1155/2016/5373670","DOIUrl":"https://doi.org/10.1155/2016/5373670","url":null,"abstract":"The mechanical, thermal, swelling, and release properties of chitosan-gelatin (CG) films have been investigated in order to verify the influence of UV and gamma radiation on the stability of the films. Thin films of chitosan and gelatin (1 : 3, w/w) that were radiated with 100 krad of gamma dose showed the best performance and the TS values reached 25, 45, and 49 MPa, respectively, for chitosan, gelatin, and blend. The corresponding highest TS values were 23, 42, and 45 MPa, respectively, for 10 passes of UV radiation. The effect of radiation over gelatin, chitosan, and CG blend caused modification in the arrangement of molecules in the crystal lattice that is significant by XRD analysis. Surfaces of the films were also investigated by scanning electron microscope (SEM). Fourier transform infrared spectroscopy (FTIR) studies further revealed structural changes of the films. These changes were attributed to understanding the behavior of the irradiated chitosan, gelatin, and CG blend on application of thermal energy using DSC and TGA studies, water uptake of the films in aqueous medium, and soil degradation properties to observe the best possibility for its application.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"32 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2016-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80697826","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: 16

Investigation of Coagulation Activity of Cactus Powder in Water Treatment 仙人掌粉在水处理中的凝血活性研究

Journal of Chemical Technology & Biotechnology Pub Date : 2016-01-01 DOI: 10.1155/2016/7815903

Hayelom Dargo Beyene, Tessema Derbe Hailegebrial, W. B. Dirersa

{"title":"Investigation of Coagulation Activity of Cactus Powder in Water Treatment","authors":"Hayelom Dargo Beyene, Tessema Derbe Hailegebrial, W. B. Dirersa","doi":"10.1155/2016/7815903","DOIUrl":"https://doi.org/10.1155/2016/7815903","url":null,"abstract":"This paper is focused on the comparative study of cactus powder, Alum, and their combination of physiochemical analyses of water sample such as TDS, pH, conductivity, salinity, and turbidity using jar test. The result indicated that percentage removal of turbidity from turbid water sample increased from 23.9% to 54% and 28.46% to 58.2% as dose increased from 0.50 to 3.50 g for both cactus powder and Alum, respectively. Cactus powder also has a marginal effect on pH value (7.33 at 0.50 g, 7.49 at 1.50 g, 7.57 at 2.50 g, and 7.57 at 3.50 g) as compared to the usage of chemical coagulants (Alum). The salinity was increased from 0.4% to 0.69 % and 0.39% to 0.98% as the dose of cactus powder and Alum increased from 0.50 g to 3.50 g, respectively. The result revealed that cactus powder is more effective in pH upholding, TDS maintenance, and salinity removal than Alum, but their combination is the most effective in terms of turbidity removal, reduction of salinity, reduction of conductivity, and reduction of TDS and has a marginal effect on dissolved oxygen (DO) value. In conclusion, the combination of Alum and cactus powder is more effective for turbidity removal, salinity removal, and pH and conductivity upholding than either of them used individually.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"14 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82352397","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

Extraction and Characterization of Fibres from the Stalk and Spikelets of Empty Fruit Bunch 空果串茎、小穗纤维的提取及特性研究

Journal of Chemical Technology & Biotechnology Pub Date : 2015-07-09 DOI: 10.1155/2015/750818

Y. R. Nafu, Y. R. Nafu, J. Foba-Tendo, E. Njeugna, G. Oliver, Kavian Omar Cooke

{"title":"Extraction and Characterization of Fibres from the Stalk and Spikelets of Empty Fruit Bunch","authors":"Y. R. Nafu, Y. R. Nafu, J. Foba-Tendo, E. Njeugna, G. Oliver, Kavian Omar Cooke","doi":"10.1155/2015/750818","DOIUrl":"https://doi.org/10.1155/2015/750818","url":null,"abstract":"Fibres from different parts of empty fruit bunch, which is a major solid waste from oil palm processing, were subjected to different pretreatments and characterised for variability in length and diameter, mechanical performance, and proximate and trace element composition. Morphology and surface composition of the fibres were determined using scanning electron microscopy with energy dispersive X-ray. The fibres were further treated with KOH-boric acid and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. Fibre yield was higher for spikelet than stalk. Fibres from stalk were generally larger in diameter and showed significant differences in potassium and galacturonic acid content, strength, and rigidity. Scanning electron microscopy confirmed the widespread occurrence of silica bodies as well as significant differences in the microstructure of stalk and spikelet fibres. Stalk fibres showed a greater level of porosity than spikelet fibres in the section perpendicular to the major axis. The morphology of KOH-boric acid treated fibres suggested higher recalcitrance of spikelet fibres. The significant differences between fibres from stalk and spikelet suggest that EFB, used as feedstock for biobased industries, requires more systematic characterization and separation into stalk and spikelet, which may lead to a more judicious exploitation of this valuable waste.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"26 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89701522","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: 27

Insoluble Content, Ionic Composition, Density, and X-Ray Diffraction Spectra of 6 Evaporites from Niger Republic 尼日尔共和国6种蒸发岩的不溶物含量、离子组成、密度和x射线衍射光谱

Journal of Chemical Technology & Biotechnology Pub Date : 2015-05-07 DOI: 10.1155/2015/518737

H. Saidou, A. Hamzaoui, A. M’nif

引用次数: 6

Microtron Irradiation Induced Tuning of Dielectric Properties of LDPE-ZnO Nanocomposites 微波辐照诱导LDPE-ZnO纳米复合材料介电性能的调谐

Journal of Chemical Technology & Biotechnology Pub Date : 2015-02-23 DOI: 10.1155/2015/764687

Deepu Thomas, S. Augustine, J. Prakash

引用次数: 2

Distribution Pattern of Metals in Atmospheric Settling Dust along Roads in Kano Metropolis, Nigeria 尼日利亚卡诺市道路大气沉降尘埃中金属的分布模式

Journal of Chemical Technology & Biotechnology Pub Date : 2015-02-10 DOI: 10.1155/2015/739325

O. Okunola, A. Uzairu, S. Uba, C. S. Ezeanyanaso, Y. Alhassan

{"title":"Distribution Pattern of Metals in Atmospheric Settling Dust along Roads in Kano Metropolis, Nigeria","authors":"O. Okunola, A. Uzairu, S. Uba, C. S. Ezeanyanaso, Y. Alhassan","doi":"10.1155/2015/739325","DOIUrl":"https://doi.org/10.1155/2015/739325","url":null,"abstract":"The sequential extraction of Cd, Cr, Ni, Pb, Cu, and Zn in atmospheric dust particles collected along ten high traffic roads in Kano metropolis was carried out. Analyses of metals in the extracts were done using flame atomic absorption spectrometry (FAAS). The samples analyzed for metals indicated high levels of Cd, Cr, Ni, Pb, Cu, and Zn in the atmospheric dust samples. The sequential extractions that showed significant amount of Cd were associated with and Fe-MnO fractions especially during the dry seasons. For Cr and Ni, their occlusion in crystal lattice of the soil fraction exhibited the highest percentage. Pb in the particulate dust samples is significantly associated with the carbonate bound fraction with range of 8.81–64.69% across the season. The behaviour of Cu is quite different from other metals in that percentage fractions are higher in the organic bound. As for Zn, significant amounts were associated with the residue fractions ranging from 0.96 to 87.50% across the seasons. This study revealed contamination of the particulate dust with Cd and Pb; this implies health risks to human, living or carrying out daily activities along the corridors of these roads.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"193 11 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2015-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86752444","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: 4

Proficient Procedure for Preparation of Quinoline Derivatives Catalyzed by NbCl5 in Glycerol as Green Solvent 以甘油为绿色溶剂，NbCl5催化制备喹啉衍生物的熟练方法

Journal of Chemical Technology & Biotechnology Pub Date : 2015-01-21 DOI: 10.1155/2015/743094

M. Nasseri, B. Zakerinasab, Sayyede Kamayestani

引用次数: 4

Aminated β-Cyclodextrin-Modified-Carboxylated Magnetic Cobalt/Nanocellulose Composite for Tumor-Targeted Gene Delivery 胺化β-环糊精修饰羧化磁性钴/纳米纤维素复合材料用于肿瘤靶向基因递送

Journal of Chemical Technology & Biotechnology Pub Date : 2014-12-31 DOI: 10.1155/2014/184153

T. Anirudhan, S. R. Rejeena

引用次数: 9

Fast Release of Sulfosalicylic Acid from Polymer Implants Consisting of Regenerated Cellulose/γ-Ferric Oxide/Polypyrrole 再生纤维素/γ-氧化铁/聚吡咯聚合物植入体快速释放磺基水杨酸的研究

Journal of Chemical Technology & Biotechnology Pub Date : 2014-12-22 DOI: 10.1155/2014/474268

Nargis A. Chowdhury, J. Robertson, A. Al-Jumaily, M. Ramos

{"title":"Fast Release of Sulfosalicylic Acid from Polymer Implants Consisting of Regenerated Cellulose/γ-Ferric Oxide/Polypyrrole","authors":"Nargis A. Chowdhury, J. Robertson, A. Al-Jumaily, M. Ramos","doi":"10.1155/2014/474268","DOIUrl":"https://doi.org/10.1155/2014/474268","url":null,"abstract":"This work presents a comparative study on the rate of drug release from implantable matrices induced by electric and magnetic fields separately for better biomedical applications. The matrices were prepared by coating γ-ferric oxide dispersed regenerated cellulose film by polypyrrole doped with sulfosalicylic acid as an anti-inflammatory drug. The drug release mechanisms were studied under both the electric and the magnetic fields separately in an acetate buffer solution with pH 5.5 and temperature 37°C during a period of 5 hours. The amount of drug released was analysed by UV-Vis spectrophotometry. The mechanism of drug release from the matrices under electric field includes expansion of conductive polymer chain and the electrostatic force between electron and drug. The drug release mechanism from the matrices under magnetic field is based on the fact that the heat produced locally by magnetic particles loosens the polymer (polypyrrole) chain surrounding the particles. As a result, the drugs attached to the polypyrrole chain come out to the release medium. The matrices showed fast release of drug, that is, more than 60% of the loaded drug was released within 1 h, and are ideal for the treatment of illness in an emergency care.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"C-20 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85067655","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