ChemSearch Journal最新文献_第3页

Melon ( Cucumismelo ) and Groundnut ( Arachishypogaea ) peel extracts as corrosion inhibitors for mild steel in hydrochloric acid solution 甜瓜(Cucumismelo)和花生(Arachishypogaea)果皮提取物在盐酸溶液中作为低碳钢的缓蚀剂

ChemSearch Journal Pub Date : 2016-01-01 DOI: 10.4314/CSJ.V7I2.2

B. Ita, H. Louis, T. Magu, B. Nyong, C. R. Okon

引用次数: 4

Stabilization of Model Crude Oil Emulsion using Different Concentrations of Asphaltene 不同沥青质浓度对模型原油乳状液的稳定作用

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I2.5

O. Alimi, O. Oyedeji

{"title":"Stabilization of Model Crude Oil Emulsion using Different Concentrations of Asphaltene","authors":"O. Alimi, O. Oyedeji","doi":"10.4314/CSJ.V6I2.5","DOIUrl":"https://doi.org/10.4314/CSJ.V6I2.5","url":null,"abstract":"As part of an ongoing research into the stability of oil-field emulsions, model oil samples have been utilized to probe the effects of asphaltene interactions on crude oil/water emulsion stability. Asphaltenes were precipitated from treated Ondo State oil sand bitumen with n-hexane in a 40:1 solvent to bitumen ratio which was allowed to stand for 24 hours before it was filtered. Model oil samples were prepared from n-hexane and toluene with varying masses of asphaltene dissolved in them (0.05-0.1 %). Emulsions were prepared from mixtures of model oil with 5 cm 3 of de-ionized water. Results showed that the stability of the prepared emulsions increased with asphaltene concentration of the model oil sample, with the model oil containing 0.1 % of asphaltene forming the most stable emulsion. Therefore, the higher the concentration of asphaltene in the model oil, the more stable the model oil/water emulsions formed. This is similar to literature reports on oil-field emulsion therefore the interaction of asphaltene with the prepared model oils can be used as a model to study crude oil emulsion stabilization processes. Keywords : Asphaltene, Bitumen, Crude oil, Emulsion, Model oil, Stabilization","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76736742","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

Use of Activated Carbon Derived from Maize Cob and Mahogany Seed Shell for the Removal of Colour from Textile Effluent 用玉米芯和红木籽壳提取的活性炭去除纺织废水中的颜色

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I2.10

S. Gumel, S. Ismail

引用次数: 0

Evaluation of Neutralizing Capacity of Different Commercial Brands of Antacid Tablets 不同市售品牌抗酸片中和能力评价

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I2.6

K. Abdu, M. Abbagana

引用次数: 2

Trace metal Levels in Some Packaged Fruit Juices Sold in Makurdi Metropolis Markets, Nigeria 尼日利亚马库尔迪大都会市场出售的包装果汁中痕量金属含量

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I2.8

I. Eneji, Aa Nurain, O. Salawu

{"title":"Trace metal Levels in Some Packaged Fruit Juices Sold in Makurdi Metropolis Markets, Nigeria","authors":"I. Eneji, Aa Nurain, O. Salawu","doi":"10.4314/CSJ.V6I2.8","DOIUrl":"https://doi.org/10.4314/CSJ.V6I2.8","url":null,"abstract":"The concentrations of ten (10) trace metals (Cr, Mn, Fe, Co, Ni, Cu, Zn, Se, Cd and Pb) in samples of commonly consumed fruit juices in Nigeria were determined using Atomic Absorption Spectrophotometric (AAS) technique. The mean concentration (mg/L) of the trace metals in the samples analyzed were as follows: Cr (0.172±0.05), Mn (2.29±1.0), Fe (14.4±7.9), Co (0.739±0.29), Ni (0.217±0.17), Cu (0.758±0.47), Zn (1.79±1.3) and Se (0.385±0.25). However, Cd and Pb were below the detection limit of the AAS and therefore not detected in all the juice samples analyzed. The mean concentrations of trace metals in descending order for all the fruit juices samples analyzed was; pineapple > orange > apple. Similarly, the pattern of mean concentrations of trace metals for the six different brands investigated were coded as follows: Ceres (CR) > Chivita (CH) > Fumman (FU) > Frutta (FR) > Soy good (SG) > Nature’s fresh (NF). Some of the results obtained were comparable to those found in the literature, but urgent attention is required to address high metal content found in pineapple juice of one brand (CR). Keywords : Atomic Absorption Spectrophotometric, Fruit Juice, Makurdi, Nigeria, Trace metals.","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73837685","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

Phytochemical Screening and Antimicrobial Activity of Leaves and Fruits Extract of Ficus sycomorus 梧桐叶、果提取物的植物化学筛选及抑菌活性研究

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I1.10

S. Mudi, A. Muhammad, J. Musa, Y. Datti

引用次数: 5

Adsorptive, Kinetic, Thermodynamic and Inhibitive Properties of Cissus Populnea Stem Extract on the Corrosion of Aluminum in Acid Medium. 茜草茎提取物对铝在酸性介质中腐蚀的吸附、动力学、热力学和抑制性能。

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I1.4

H. Chahul, A. Ayuba, S. Nyior

引用次数: 6

Effects of Chemical Surface Treatment on Mechanical Properties of Sisal Fiber Unsaturated Polyester Reinforced Composites 化学表面处理对剑麻纤维不饱和聚酯增强复合材料力学性能的影响

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I2.2

A. Salisu, H. Musa, M. Yakasai, K. M. Aujara

引用次数: 7

The Effect of Fiber Treatment on the Water Absorption of Piliostigma Reinforced Epoxy 纤维处理对毛柱头增强环氧树脂吸水率的影响

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I2.1

S. Gumel, A. Tijjani

{"title":"The Effect of Fiber Treatment on the Water Absorption of Piliostigma Reinforced Epoxy","authors":"S. Gumel, A. Tijjani","doi":"10.4314/CSJ.V6I2.1","DOIUrl":"https://doi.org/10.4314/CSJ.V6I2.1","url":null,"abstract":"In this paper, the water absorption behaviour of 14 days hardened composites based on Piliostigma fiber and a thermosetting matrix (Epoxy) was studied. The water absorption tests were carried out in order to study the durability of the composites. The comparative study of water absorption behaviour of composites reinforced with fiber and chemically modified in three reagents (NaOH, KMnO 4 , BPO) respectively confirmed that surface treatment of the fibres influences the sorption process. The most significant decrease in hydrophilicity of Piliostigma was found in the case of Piliostigma fiber that was modified by BPO, This decrease relates to change in the chemical composition of the Piliostigma fiber, especially due to a decrease in the average degree of cellulose polymerization as well as the hemicellulose content. The chemical composition effect on the surface modification was analysed by means of Fourier Transform Infrared Spectroscopy (FTIR), The experimental spectroscopic information was compared with theoretical analysis of molecular vibrations. The result obtained from this comparison confirmed that the chemical modification of the composites was successfully carried out. Keywords : Chemical treatment, Composite, Hydrophilicity, Natural fiber, Thermosetting, Water absorption","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85979530","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

Cytotoxicity, Total Phenolic Contents and Antioxidant Activity of the Leaves Extract of Annona Muricata 番荔枝叶提取物的细胞毒性、总酚含量及抗氧化活性研究

ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/csj.v6i1.7

NS Ibrahim, M. Abdullahi

{"title":"Cytotoxicity, Total Phenolic Contents and Antioxidant Activity of the Leaves Extract of Annona Muricata","authors":"NS Ibrahim, M. Abdullahi","doi":"10.4314/csj.v6i1.7","DOIUrl":"https://doi.org/10.4314/csj.v6i1.7","url":null,"abstract":"The leaves of Annona muricata were extracted using ethanol and the extracts were evaluated for cytotoxicity using Brine Shrimp Lethality Assay, total phenolic content (TPC) and antioxidant activity using DPPH radical scavenging assay. The crude extract showed 73.33 % mortality at 1000 μg/mL concentration and its LC 50 -value was 1.59 μg/mL against brine shrimp larvae. The crude extract exhibited a significant toxicity in comparison with the positive control, the potassium dichromate (K 2 Cr 2 O 7 ) with LC 50 -value 0.57 μg/mL. The TPC assay of the extracts was expressed as mg of tannic acid equivalent per gram of sample and mg of gallic acid equivalent per gram of sample, the result showed the content of phenolic compounds as 266.86 ± 2.21 mg·TAE/g and 278.60 ± 4.21 mg·GAE/g respectively. The DPPH radical scavenging activity of the ethanol extracts displayed a signigicant free radical scavenging capacity with the IC 50 value of 2.58 μg/ml compared with the standard drugs, the ascorbic acid (IC 50 0.563 μg/mL) and the butylated hydroxytoluene (IC 50 0.570 μg/mL). The result suggested that the antioxidant property exhibited by the ethanol extract could be associated with its high total phenolic contents. Keywords : Annona muricata, Antioxidants, Cytotoxicity, Total Phenolic Contents","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79284430","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