发布求助
文献互助 智能选刊 最新文献

ChemSearch Journal最新文献

筛选
英文 中文
Synthesis and Single Crystal X-Ray Structure Determination of 3,3',5,5'- tetramethyl-4,4'-bipyrazolium tetrachloromanganate(II) monohydrate ([H 2 Me 4 bpz] 2 [MnCl 4 ]Cl 2 ·H 2 O) 3,3′，5,5′-四甲基-4,4′-联吡唑四氯锰酸盐(II)一水合物([h2me 4 bpz] 2 [MnCl 4]Cl 2·h2o)的合成及单晶x射线结构的测定
ChemSearch Journal Pub Date : 2015-01-01 DOI: 10.4314/CSJ.V6I1.11
M. Kurawa, A. Orpen
{"title":"Synthesis and Single Crystal X-Ray Structure Determination of 3,3',5,5'- tetramethyl-4,4'-bipyrazolium tetrachloromanganate(II) monohydrate ([H 2 Me 4 bpz] 2 [MnCl 4 ]Cl 2 ·H 2 O)","authors":"M. Kurawa, A. Orpen","doi":"10.4314/CSJ.V6I1.11","DOIUrl":"https://doi.org/10.4314/CSJ.V6I1.11","url":null,"abstract":"The title compound was synthesized mechanochemically by grinding MnCl 2 .4H 2 O and the protonated organic ligand [H 2 Me 4 bpz] resulting in the formation of [H 2 Me 4 bpz][MnCl 4 ]. Suitable single crystal of this compound was analysed through X-ray diffraction technique to ascertain its composition and internal structure. Single crystal structure determination at 100 K revealed needle-like crystals in an orthorhombic crystal system. The asymmetric unit of the cell consists of an isolated chloride ion, one half of a tetrahedral [MnCl 4 ] 2- anion, a [H 2 Me 4 bpz] 2+ dication and one half of a molecule of water. Keywords: Crystal Engineering, Hydrogen Bond, X-ray Crystallography","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":"80778367","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
Infrared Absorption Band Assignment in Benzanilide and Some of its p-Substituted Derivatives 苯甲苯胺及其部分p取代衍生物的红外吸收谱带分配
ChemSearch Journal Pub Date : 2014-01-01 DOI: 10.4314/CSJ.V5I2
N. Ufaruna
{"title":"Infrared Absorption Band Assignment in Benzanilide and Some of its p-Substituted Derivatives","authors":"N. Ufaruna","doi":"10.4314/CSJ.V5I2","DOIUrl":"https://doi.org/10.4314/CSJ.V5I2","url":null,"abstract":"The phytochemical screening of extracts from Euphorbia balsamifera was carried out, and the results revealed that the stem bark contains alkaloids, tannins, flavonoids, saponins, glycosides, terpenoids and sterols. The ethanol extract of the stem bark of Euphorbia balsamifera (commonly known as Ayyara in Hausa) was sequentially partitioned with petroleum ether, chloroform, ethyl acetate and methanol. The extracts were respectively labeled EB1, EB2, EB3, and EB4, with the ethanolic extract labeled EB. The extracts, 12.5% and 25% w/v, were tested for repellency against Anopheles gambiae , and the repellent activity was assessed using the human-bait technique. Five volunteers participated in the laboratory tests to ascertain the repellent activity of the extracts, and each volunteer was test with one extract, with each test repeated in triplicate. The chloroform extract labeled EB1-02 was found to be the most active, (97.2% and 100% repellency), while the extract labeled EB1-03 recorded the least activity of 32.4% and 21.6%. It can be concluded that the chloroform extract labeled EB1-02 is responsible for repellent activity of Euphorbia balsamifera. Keywords: Anopheles gambiae, Euphorbia balsamifera extracts, Human-bait technique, Phytochemicals, Repellency","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73835714","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
Synthesis and Characterization of Multimetallic Fe(II) and Mn(II) Using N4O3 Potentially Heptadentate Ligand N4O3潜在七齿配体合成多金属Fe(II)和Mn(II)及其表征
ChemSearch Journal Pub Date : 2014-01-01 DOI: 10.4314/CSJ.V5I1
A. Mustapha, S. Gani
{"title":"Synthesis and Characterization of Multimetallic Fe(II) and Mn(II) Using N4O3 Potentially Heptadentate Ligand","authors":"A. Mustapha, S. Gani","doi":"10.4314/CSJ.V5I1","DOIUrl":"https://doi.org/10.4314/CSJ.V5I1","url":null,"abstract":"Potentially heptadentate (N4O3) tripodal Schiff-base ligand, tris(5-Bromo-2-hydroxybenzylaminoethyl)amine has been prepared and characterized using various spectroscopic methods. It is derived from the condensation reactions of tris(2-aminoethyl)amine (tren), with 3 equivalents of 5-bromo-2-hydroxybenzaldehyde. Iron(II) and Manganese(II) complexes of the resulting ligand were obtained from its reactions with Fe(II) and Mn(II) salts in absolute methanol for the metal to ligand ratio 2:3. These complexes were characterized by Solubility, Conductivity, IR and UV-VIS spectrometry, elemental analysis and mass spectrometry. Keywords : Iron, Manganese, Schiff- base, Tren5BrSal, tris-(2-aminoethyl)amine","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77228344","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
Spectrophotometric Determination of Nitrate and Phosphate Levels in Drinking Water Samples in The Vicinity of Irrigated Farmlands of Kura Town, Kano State - Nigeria 分光光度法测定尼日利亚卡诺州Kura镇灌溉农田附近饮用水样品中的硝酸盐和磷酸盐水平
ChemSearch Journal Pub Date : 2013-01-01 DOI: 10.4314/CSJ.V4I1
Sa'id, A. Mahmud
{"title":"Spectrophotometric Determination of Nitrate and Phosphate Levels in Drinking Water Samples in The Vicinity of Irrigated Farmlands of Kura Town, Kano State - Nigeria","authors":"Sa'id, A. Mahmud","doi":"10.4314/CSJ.V4I1","DOIUrl":"https://doi.org/10.4314/CSJ.V4I1","url":null,"abstract":"Twelve drinking water samples from boreholes were collected from various sampling sites around the vicinity of Kura irrigated farmlands using polythene plastic containers and were analysed for the nitrate and phosphate levels using uV – visible spectrophotometer. From the results, it was found that all the samples had Nitrate level below the World Health Organization maximum contaminant level of 50mg/l with a mean concentration of (17.84 ± 4.49) mg/l. phosphate level was also analysed and the results indicated that all the sampling sites had phosphate level above the World Health Organization maximum contaminant level of 0.03 mg/l with a mean concentration of (8.74 ± 2.56) mg/l. Keywords : Drinking water, Irrigated farmland, Nitrate, Phosphate, UV-VisibleSpectrophotmeter.","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75937532","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
Comparative study on the minerals composition of the flesh of red and yellow fruits of Terminalia catappa L. 弹射木红、黄果实果肉矿物质组成的比较研究。
ChemSearch Journal Pub Date : 2012-01-01 DOI: 10.4314/CSJ.V3I1
M. Barde
{"title":"Comparative study on the minerals composition of the flesh of red and yellow fruits of Terminalia catappa L.","authors":"M. Barde","doi":"10.4314/CSJ.V3I1","DOIUrl":"https://doi.org/10.4314/CSJ.V3I1","url":null,"abstract":"The analyses of mineral composition of red and yellow fruits varieties of Terminalia catappa using standard analytical apparatus, reagents and procedures gave the following results on dry weight basis: K (1980.20mg and 1809mg), Na (17.82mg and 17.33mg), Ca (143.47mg and 143.30mg), Mg (40.39mg and 48.50mg), P (13.20mg and 13.20mg), Fe (5.50mg and 3.98mg), Cu (0.25mg and 0.43mg), Mn (3.09mg and 1.02mg), S (70.50mg and 50.47mg) and Zn (1.28mg and 1.42mg) for red and yellow fruits respectively. On the other hand Cd, Cr, Co and Pb were not detected on both fruits which indicate that both fruits are safer for human consumption. Therefore, from these results it can be recommended that red and yellow fruits of T.catappa l. are good sources of K, Mg Mn, Na, Ca, Cu, Fe and S but poor sources of P and Zn. Key words: composition, fruits, minerals, Terminal catappa.","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76659756","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
Comparison of ascorbic acid content of some selected fresh and dried tropical vegetables 几种精选新鲜和干燥热带蔬菜抗坏血酸含量的比较
ChemSearch Journal Pub Date : 2012-01-01 DOI: 10.4314/CSJ.V3I2
S. Gumel, B. Garba, H. Ibrahim
{"title":"Comparison of ascorbic acid content of some selected fresh and dried tropical vegetables","authors":"S. Gumel, B. Garba, H. Ibrahim","doi":"10.4314/CSJ.V3I2","DOIUrl":"https://doi.org/10.4314/CSJ.V3I2","url":null,"abstract":"Ascorbic acid (Vitamin C) was determined in four different tropical vegetables (Cucumber, Cabbage, Spinach and Tomatoes) sourced from Yankaba market, Kano state. Colorimetric method was used for the  determination. The ascorbic acid content in the cucumber, cabbage, spinach and tomatoes ranged from 51.67mgL -1 to 395.45mgL -1 . Tomatoes were found to have the highest concentrations (395.45mgL -1 ) while cucumber has the lowest (181.82mgL -1 for the fresh and 60.00mgL -1 and 51.67mgL -1 respectively) for the dried vegetables. The deficiency of ascorbic acid is believed to result in scurvy, a disease characterized by spongy and sore gum, loose teeth, anaemia, swollen joint, fragile blood vessels. Frequent intake, therefore of these vegetables rich in vitamin C (especially tomatoes) will help prevent these problems in human being. This indicated that although the vegetables are rich in ascorbic acid content, their dried forms have grossly inadequate amount to ensure the provision of required dietary intake (RDI) of vitamin C for humans. Keywords: Ascorbic acid, Comparison, Vegetables, Vitamins","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74638984","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
Chemical analysis and base-promoted hydrolysis of locally extracted shea nut fat 当地提取的乳木果脂肪的化学分析和碱促水解
ChemSearch Journal Pub Date : 2011-01-01 DOI: 10.4314/CSJ.V2I1-2
A. Warra, I. Wawata, A. B. Yauri
{"title":"Chemical analysis and base-promoted hydrolysis of locally extracted shea nut fat","authors":"A. Warra, I. Wawata, A. B. Yauri","doi":"10.4314/CSJ.V2I1-2","DOIUrl":"https://doi.org/10.4314/CSJ.V2I1-2","url":null,"abstract":"The study was on the chemical analysis and base- promoted hydrolysis of extracted shea nut fat. The local method of extraction of the shea nut oil was employed in comparison with literature report. A simple cold-process alkali hydrolysis of the shea nut oil was used in producing the soap. The chemical analysis of the oil revealed that it had saponification, iodine and acid values of 136.32 ±1.943 mgKOH/g, 50.50 ± 8.023g I2/100g and 14.77 ± 0.065 mgKOH/g respectively. The analytical values obtained were significantly in favour of the utilization of the indigenous shea nut fat for soap production on commercial scale. The pH of the soap was 10.33, which is in agreement with the pH range of 9-11 set by the National Agency for Food and Drug Administration and Control(NAFDAC), due to incomplete alkali hydrolysis resulting from the saponification process. The foam height of the soap was 4.2cm lower than that of Jatropha, sesame and cotton seed soaps analyzed higher than that of Neem, castor and castor superfatted with glycerine soaps. The soap was white and slightly soluble in distilled water. Key words : Shea nut fat, chemical analysis, Saponification, Foam ability and Solubility.","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72850260","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
The characteristics of a good teacher and how to become one 一个好老师的特点以及如何成为一个好老师
ChemSearch Journal Pub Date : 2010-01-01 DOI: 10.4314/CSJ.V1I1
Hamza Umar Zango, Sani, Muhammad Kwalli, A. Danlami
{"title":"The characteristics of a good teacher and how to become one","authors":"Hamza Umar Zango, Sani, Muhammad Kwalli, A. Danlami","doi":"10.4314/CSJ.V1I1","DOIUrl":"https://doi.org/10.4314/CSJ.V1I1","url":null,"abstract":"The need for good teachers and good teaching has been, and will continue to be researched into and identified. This paper discusses the qualities of good teachers in relation o classroom teaching. It introduces teaching as involving communication and interaction between teacher and the students, and describes the teacher as a motivator and facilitator of learning. The paper highlighted how to become a good teacher. It also offers suggestions how good teachers can be produced .It concludes that a good teacher or one, who want to be, should have all the general attributes and qualities of a good professional classroom teacher so that they can excel and have good and effective performance in the classroom. Keywords: Teacher, Students, Schools, Traits","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80606452","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
Phenolic content, flavonoid content and antioxidant activity of some medicinal plants used for traditional maternal healthcare in Katsina State, Nigeria 尼日利亚卡齐纳州一些用于传统产妇保健的药用植物的酚含量、类黄酮含量和抗氧化活性
ChemSearch Journal Pub Date : 1900-01-01 DOI: 10.4314/CSJ.V7I2
S. Sulaiman
{"title":"Phenolic content, flavonoid content and antioxidant activity of some medicinal plants used for traditional maternal healthcare in Katsina State, Nigeria","authors":"S. Sulaiman","doi":"10.4314/CSJ.V7I2","DOIUrl":"https://doi.org/10.4314/CSJ.V7I2","url":null,"abstract":"An ethnobotanical study of medicinal plants used for traditional maternal healthcare in Katsina State, Nigeria revealed that Artemisia annua , Euphorbia balsamifera , Guiera senegalensis , Ipomoea asarifolia and Mitragyana inermis are the most common herbs used by women to treat and prevent ailments associated with oxidative stress during pregnancy. In this study, the phenolic flavonoid content and antioxidant activities of those herbs were investigated to justify their folkloric use. Phenolic and flavonoid contents were respectively assessed by evaluating total phenolic content (TPC) and total flavonoid Content (TFC) while antioxidant activity was determined using ferric reducing antioxidant power (FRAP), total antioxidant capacity (TAC) and 2,2ꞌ- diphenyl-1- picrylhydrazyl (DPPH) assays. G. senegalensis showed the highest TPC, TFC, FRAP, TAC and lowest DPPH IC 50 (136.07mg GAE/g DW, 158.80mg QE/g DW, 34.25mg AAE/g DW 424.73mg AAE/g DW and 442.82μg/ml, respectively) followed by M. inermis (113.69mg GAE/g DW, 87.50mg QE/g DW, 19.37mg AAE/g DW, 332.30mg AAE/g DW and 609μg/ml, respectively). Correlation analyses revealed strong positive linear correlations between phenolic antioxidants (TPC and TFC) and antioxidant assays (FRAP, TAC and DPPH) with regression coefficient (R 2 ) ranging from 0.695 to 0.867 implying that phenolic compounds are responsible for the antioxidant properties observed in these herbs. Keywords: Antioxidant activity, Katsina state, maternal healthcare, medicinal plants, Nigeria, traditional","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80670322","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
Preparation and Characterization of Water Based UV Curable Flexographic Printing Ink. 水性UV固化柔性版油墨的制备与表征。
ChemSearch Journal Pub Date : 1900-01-01 DOI: 10.4314/CSJ.V4I2
A. Salisu, Inuwa
{"title":"Preparation and Characterization of Water Based UV Curable Flexographic Printing Ink.","authors":"A. Salisu, Inuwa","doi":"10.4314/CSJ.V4I2","DOIUrl":"https://doi.org/10.4314/CSJ.V4I2","url":null,"abstract":"Polyvinyl alcohol was utilized as a single sole binder in the formulation of water based UV curable flexographic printing inks. Six different formulation containing 2%, 3%, 4%, 5%, 8% and 10% polyvinyl alcohol were prepared using 1-(4-nitrophenyl)azo-2-naphthol as pigment and potassium dichromate as a cross linking agent. The formulations prepared were characterized for viscosity and FT-IR before being printed on different substrates. The ink films formed were assessed by optical microscopy, the print quality was found to meet most requirements in colour printing chemistry and technology applications. Keywords : Flexographic printing inks, Pigment, Polyvinyl alcohol, Potassium dichromate","PeriodicalId":9900,"journal":{"name":"ChemSearch Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77663743","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信