发布求助
文献互助 智能选刊 最新文献

Revista Productos Naturales最新文献

筛选
英文 中文
BIOSORPTION OF CHROMIUM FROM TANNERY WASTEWATERS BY CHITOSAN OBTAINED FROM EXOSKELETON SHRIMP 外骨骼虾壳聚糖对制革废水中铬的生物吸附
Revista Productos Naturales Pub Date : 2009-05-11 DOI: 10.3407/RPN.V3I1.21
Beatriz Jaramillo Colorado, Edisson Duarte Restrepo, Jesús Olivero Verbel
{"title":"BIOSORPTION OF CHROMIUM FROM TANNERY WASTEWATERS BY CHITOSAN OBTAINED FROM EXOSKELETON SHRIMP","authors":"Beatriz Jaramillo Colorado, Edisson Duarte Restrepo, Jesús Olivero Verbel","doi":"10.3407/RPN.V3I1.21","DOIUrl":"https://doi.org/10.3407/RPN.V3I1.21","url":null,"abstract":"Chromium in the effluent is a major concern for tanning industry. Chemical precipitation methods are commonly employed for the removal of chromium but this leads to formation of chrome-bearing solid waste. Ion exchange and membrane separation methods are relatively expensive. In this study a chitosan bioadsorbent has been employed to remove chromium from tannery effluent. The effect of pH and chromium concentration showed chitosan to exhibit uptake of about 52 mg Cr (III)/g at optimum pH of 4.0. Langmuir and Freundlich models were applied. Increase of initial concentration of Cr resulted to a decrease in adsorption efficiency.","PeriodicalId":153647,"journal":{"name":"Revista Productos Naturales","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132181775","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
FRAGMENTACIÓN DIASTEREOESPECÍFICA EN NCI DE DOS LIGNANOS DIBENCILBUTÁNICOS DE LA CORTEZA DE Dugandiodendron argyrotrichum (MAGNOLIACEAE) 木兰科木质素二苄基丁烷树皮的非对星特异性裂解
Revista Productos Naturales Pub Date : 2008-05-31 DOI: 10.3407/RPN.V2I1.17
J. D. Vasquez
{"title":"FRAGMENTACIÓN DIASTEREOESPECÍFICA EN NCI DE DOS LIGNANOS DIBENCILBUTÁNICOS DE LA CORTEZA DE Dugandiodendron argyrotrichum (MAGNOLIACEAE)","authors":"J. D. Vasquez","doi":"10.3407/RPN.V2I1.17","DOIUrl":"https://doi.org/10.3407/RPN.V2I1.17","url":null,"abstract":"Two dibenzylbutane lignans, dihydroguairetic acid and austrobailigan-6 were isolated as mixture of their diastereoisomers from the bark ethanolic extract of Dugandiodendron argyrotrichum (Magnoliaceae), a colombian endangered species. Characterization was achieved by 1 H and 13 C NMR, DEPT, COSY, HMQC, HMBC and GCMS analysis. The diastereoisomer separation by GC and the diastereospecific fragmentation patterns in negative chemical ionization mass spectrometry (NCI-MS) spotlights on an interesting tool for stereochemical research.","PeriodicalId":153647,"journal":{"name":"Revista Productos Naturales","volume":"259 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115207169","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: 5
FLAVONOIDES DE Chromolaena subscandens (Hieron.) R.M. King & H. Rob.
Revista Productos Naturales Pub Date : 2008-05-26 DOI: 10.3407/RPN.V2I1.15
Antonio Guzmán, Rubén Darío Torrenegra Guerrero, O. Rodríguez
{"title":"FLAVONOIDES DE Chromolaena subscandens (Hieron.) R.M. King & H. Rob.","authors":"Antonio Guzmán, Rubén Darío Torrenegra Guerrero, O. Rodríguez","doi":"10.3407/RPN.V2I1.15","DOIUrl":"https://doi.org/10.3407/RPN.V2I1.15","url":null,"abstract":"The flavonoids rhamnocitrin (5,4’-dihydroxy-7-methoxyflavonol), sakuranetin (5,4’-dihydroxy-7-methoxyflavanone) and 3,8-dimethoxy-gossypetin (5,7,3’,4’-tetrahydroxy-3,8-dimethoxyflavone) were isolated and purified from Chromolaena subscandens’ leaves using column chromatography and thin layer chromatography methods. These substances were identified on the basis of their physical properties (melting point and Rf value), qualitative chemical reactions and spectroscopic techniques UV and NMR (experiments 1H, 13C, 1H-1H COSY, HMQC and HMBC), according to their complexity.","PeriodicalId":153647,"journal":{"name":"Revista Productos Naturales","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133067519","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
Opinion Revista de Productos Naturales 天然产品意见杂志
Revista Productos Naturales Pub Date : 2007-12-09 DOI: 10.3407/RPN.V1I1.4
O. Benavides
{"title":"Opinion Revista de Productos Naturales","authors":"O. Benavides","doi":"10.3407/RPN.V1I1.4","DOIUrl":"https://doi.org/10.3407/RPN.V1I1.4","url":null,"abstract":"","PeriodicalId":153647,"journal":{"name":"Revista Productos Naturales","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132924608","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
BIENVENIDOS A LA REVISTA PRODUCTOS NATURALES 欢迎来到天然产品杂志
Revista Productos Naturales Pub Date : 2007-12-08 DOI: 10.3407/RPN.V1I1.2
J. H. I. Martínez
{"title":"BIENVENIDOS A LA REVISTA PRODUCTOS NATURALES","authors":"J. H. I. Martínez","doi":"10.3407/RPN.V1I1.2","DOIUrl":"https://doi.org/10.3407/RPN.V1I1.2","url":null,"abstract":"","PeriodicalId":153647,"journal":{"name":"Revista Productos Naturales","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115290446","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