Journal of Chemical Technology & Biotechnology最新文献

Preparation and Characterization of Polyaniline/Graphene Oxide Nanocomposite and its Assessment for Removal of Chromium (VI) from Aqueous Media 聚苯胺/氧化石墨烯纳米复合材料的制备、表征及其去除水中六价铬的性能评价

Journal of Chemical Technology & Biotechnology Pub Date : 2019-01-01 DOI: 10.22075/CHEM.2018.3540

S. Nabavi

引用次数: 0

Study on the Factors Influencing the Extraction of Chenodeoxycholic Acid from Duck Bile Paste by Calcium Salt Method 钙盐法提取鸭胆膏中鹅去氧胆酸的影响因素研究

Journal of Chemical Technology & Biotechnology Pub Date : 2018-03-01 DOI: 10.1155/2018/7253639

Hu Xiangzheng, Feng Na, Jiaqi Zhang

引用次数: 4

Phosphorus Speciation by 31P NMR Spectroscopy in Leaf Litters and Crop Residues from Para Rubber, Cocoa, Oil Palm, and Banana Plantations in the Humid Forest Zone of Cameroon 喀麦隆湿润森林地区帕拉橡胶、可可、油棕和香蕉种植园凋落叶和作物残留物中磷的31P核磁共振谱分析

Journal of Chemical Technology & Biotechnology Pub Date : 2018-02-15 DOI: 10.1155/2018/6290236

L. Nanganoa, J. Njukeng

{"title":"Phosphorus Speciation by 31P NMR Spectroscopy in Leaf Litters and Crop Residues from Para Rubber, Cocoa, Oil Palm, and Banana Plantations in the Humid Forest Zone of Cameroon","authors":"L. Nanganoa, J. Njukeng","doi":"10.1155/2018/6290236","DOIUrl":"https://doi.org/10.1155/2018/6290236","url":null,"abstract":"The release of nutrients, including phosphorus from agricultural residues, is an important potential source of nutrients for subsequent crops. To fully understand the contribution of this residue P as a source of plant P for agricultural production, its chemical nature needs to be understood. In this study P species were identified and quantified in leaf litters and crops residues from cocoa farms, oil palm, rubber, and banana plantations by 31P nuclear magnetic resonance (NMR) spectroscopy. Phosphorus in the crop residues was predominantly in the form of inorganic P mainly as orthophosphate and ranged from 45.9 to 89.2%. The highest relative percentage of P as orthophosphate was found in cocoa pod husk (89.2%) and the lowest percentage was found in decaying banana pseudostem (45.9%). Pyrophosphate was detected in trace amounts in all samples (less than 6%) except in fresh palm fronds. However, orthophosphate diester was detected only in fresh palm fronds (11.4%) and phytate was detected only in palm male inflorescence (6.7%). The result implied that cocoa pod husk, palm empty fruit bunch, and palm male inflorescence could be used as organic amendment, based on their high P content and release potential.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"38 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2018-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91037705","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: 6

A Simple Incorporation Route of Tris(8-hydroxyquinoline)aluminum(III) into Transparent Mesoporous Silica Films and Their Photofunctions 三(8-羟基喹啉)铝(III)在透明介孔二氧化硅薄膜中的简单掺入途径及其光功能

Journal of Chemical Technology & Biotechnology Pub Date : 2017-08-14 DOI: 10.1155/2017/7351263

M. Tagaya, K. Shinozaki, Yuri Maruko

引用次数: 3

New Pharmacophore from the Stem Bark Fractions of Acacia decurrens (Willd), an Invasive South Africa Tree 南非入侵树种黄合欢(野生)茎皮部分的新药效团

Journal of Chemical Technology & Biotechnology Pub Date : 2017-08-02 DOI: 10.1155/2017/1815278

B. Okoli, J. Modise

{"title":"New Pharmacophore from the Stem Bark Fractions of Acacia decurrens (Willd), an Invasive South Africa Tree","authors":"B. Okoli, J. Modise","doi":"10.1155/2017/1815278","DOIUrl":"https://doi.org/10.1155/2017/1815278","url":null,"abstract":"The tolerance of Acacia decurrens, an invasive species, was exploited pharmacologically in this study. Phytochemical screening revealed important secondary metabolites. Importantly, the assay shows that ethyl acetate and methanol fractions are sources of phytochemicals compared to the hexane and chloroform fractions. A bioassay-guided in vitro assay of the extracts led to the eventual isolation of four bioactive compounds by column chromatography, identification, and characterisation with the aid of GCMS, UV-Vis, FTIR, and NMR. The antimicrobial screening by disc diffusion assay revealed 22.2%, 44.4%, 66.7%, and 77.8% microbial inhibition by 2-methyl-octahydro-indene-4-carboxylic acid (AD1), 6-methyldecahydro-1H-phenanthren-9-one (AD2), 8-hydroxytetradecahydro-chrysene-1-carb aldehyde (AD3), and 8,9-dihydroxy-7-(2-hydroxy-ethyl)-9,9a-hexahydro-1H,3H-2-thia-5a-aza cyclopenta[b]anthracen-6-one (AD4), respectively. Compounds AD3 and AD4 are the most potent antibacterial compounds against Gram-positive bacteria with MIC 12.5–6.25 μg/ml. Antioxidant study of the compounds assayed with DPPH and ABTS•+ revealed that compound (AD4) is the most efficient DPPH radical scavenger with IC50 30.07 ± 0.31 and ABTS•+ scavenging activity of 4363.2 ± 452.4 μmol of TE/gDW. This provides scientific information on four pharmacophores with phyto-antioxidants and antimicrobial potential, despite the classification of A. decurrens as a Category 2 invasive plant by the National Water Act.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"62 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2017-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77595644","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

Removal of Fluoride from Water by Adsorption onto Fired Clay Pots: Kinetics and Equilibrium Studies 烧制陶罐吸附去除水中氟化物:动力学和平衡研究

Journal of Chemical Technology & Biotechnology Pub Date : 2017-07-04 DOI: 10.1155/2017/6254683

G. P. Kofa, V. H. Gomdje, C. Telegang, S. N. Koungou

引用次数: 46

OrganochlorinePesticides Residue Levels in Airand Soilfrom Nairobiand Mount Kenyaregions, Kenya 肯尼亚内罗毕和肯雅山地区空气和土壤中有机氯农药残留水平

Journal of Chemical Technology & Biotechnology Pub Date : 2017-07-01 DOI: 10.9790/5736-1007020511

J. Aucha, S. Wandiga, D. Abong’o, V. Madadi, E. M. Osoro

{"title":"OrganochlorinePesticides Residue Levels in Airand Soilfrom Nairobiand Mount Kenyaregions, Kenya","authors":"J. Aucha, S. Wandiga, D. Abong’o, V. Madadi, E. M. Osoro","doi":"10.9790/5736-1007020511","DOIUrl":"https://doi.org/10.9790/5736-1007020511","url":null,"abstract":"Thestudy investigates the organochlorine pesticides residue level in air and soilat sites in Nairobi and Mount Kenya regions, Kenya. Air and soil samples from four sites were collected and analysed for selected organochlorine pesticides (OCP) using gas chromatography equipped with electron capture detector and confirmed using GC/MS. The targeted pesticides were α-HCH, β-HCH, γ-HCH (lindane), αendosulfan, βendosulfan and Endosulfansulfate. The samples were collected seasonally between the monthsof July 2012 and April 2013. The residue levels of organochlorine pesticides in air samples during month of October ranged between0.027±0.004 to5.735±0.575 ng/M 3 , while during the Month of February the concentration ranged between 0.013±0.00 to 9.375±1.65 ng/M 3 and the levels during the month of April ranged between 0.013±0.00 to 11.508±0.26ng/M 3 . Organochlorine pesticide detected in soil during month of October ranged between BDL to 131.206 ± 14.41ng/Kg, while during the Month of February the concentration ranged between 0.418± 0.01to 38.361 ±5.39 ng/Kg and the levels during the month of April ranged between 0.406± 0.00to 26.877± 8.89 ng/Kg. The residue levels of the analysedPOPs in air and soil were generally high at the Dandora and Industrial area sites. This indicates that industrial activities such as Tetra-Pac, general plastics, Phillips industries waste and stock piles are the main sources of the new POPs in Nairobi. The high concentration level poses a health risk to residents of Dandora and Industrial area workers.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"1 1","pages":"05-11"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90081950","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

Synthesis and Characterization of CuO, TiO2, and CuO-TiO2 Mixed Oxide by a Modified Oxalate Route 改良草酸法合成CuO、TiO2及CuO-TiO2混合氧化物及表征

Journal of Chemical Technology & Biotechnology Pub Date : 2017-06-04 DOI: 10.1155/2017/4518654

Ekane Peter Etape, Lambi John Ngolui, J. Foba-Tendo, D. M. Yufanyi, Beckley Victorine Namondo

引用次数: 31

Assessment of Dissolved Ions and Microbial Coliform in Water from Selected Sites of the Upper Athi River Sub-Catchment Area, Kenya. 肯尼亚阿西河上游集水区选定地点水中溶解离子和微生物大肠菌群的评估。

Journal of Chemical Technology & Biotechnology Pub Date : 2017-05-01 DOI: 10.9790/5736-100502101109

M. MuragaJ, O. WandigaS, D. Abong’o

引用次数: 0

Physicochemical Properties of Diacetylenic Light Fuel Oil from Congolese Oleaginous Plant Ongokea gore (Hua) Pierre 刚果产油植物Ongokea gore (Hua) Pierre产二乙基轻燃料油的理化性质

Journal of Chemical Technology & Biotechnology Pub Date : 2017-03-02 DOI: 10.1155/2017/7176317

J. Ntumba, A. Mulula, K. T. Kashishi, M. N. Mifundu, R. Robiette, K. Taba

{"title":"Physicochemical Properties of Diacetylenic Light Fuel Oil from Congolese Oleaginous Plant Ongokea gore (Hua) Pierre","authors":"J. Ntumba, A. Mulula, K. T. Kashishi, M. N. Mifundu, R. Robiette, K. Taba","doi":"10.1155/2017/7176317","DOIUrl":"https://doi.org/10.1155/2017/7176317","url":null,"abstract":"Vegetable oil-based fuels are promising alternative fuels for diesel and light fuel engines because of their environmental and economic strategic advantages. In this study, Ongokea gore oil (OGO) and its fully hydrogenated oil were transesterified by means of ethanol in the presence of sodium ethoxide. Fatty acid ethyl esters (FAEE) products were confirmed by 1H NMR and characterized by physical-chemical methods in accordance with the ASTM D 6751 and AFNOR M 15-009 specifications for biodiesels and light biofuels. These methods concern determination of color, density, viscosity, flash and pour points, ash, water and sulfur contents, and corrosion on copper. It was found that pure fatty acid ethyl esters of Ongokea gore oil (B100) and its hydrogenated oil (B100-H) meet standard requirements for most of the biodiesel characteristics studied. Only the kinematic viscosity and density values were outside recommended biodiesel standard limits which makes them unsuitable for use in diesel engines. In accordance with the AFNOR M 15-009 specifications of light fuels, they can be used in light fuel engines. Physical-chemical properties of B20, a FAEE blend in petrodiesel, are within the limits prescribed for petrodiesel standards. In brief, Ongokea gore seeds, a nonedible and high-oil-producing feedstock, are suitable starting material for production of light biofuel. The latter blends in petrodiesel can be used as fuel in diesel engines.","PeriodicalId":15303,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"23 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82780196","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