dc.creatordos Santos, KSCR
dc.creatorSilva, HSRC
dc.creatorFerreira, EI
dc.creatorBruns, RE
dc.date2005
dc.date37622
dc.date2014-11-16T08:38:14Z
dc.date2015-11-26T16:21:21Z
dc.date2014-11-16T08:38:14Z
dc.date2015-11-26T16:21:21Z
dc.date.accessioned2018-03-28T23:03:22Z
dc.date.available2018-03-28T23:03:22Z
dc.identifierCarbohydrate Polymers. Elsevier Sci Ltd, v. 59, n. 1, n. 37, n. 42, 2005.
dc.identifier0144-8617
dc.identifierWOS:000226439700005
dc.identifier10.1016/j.carbpol.2004.08.020
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/52604
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/52604
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/52604
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1267938
dc.descriptionA 3(2) factorial design investigation to optimize N-carboxybutylchitosan was carried out varying the levulinic acid/chitosan molar ratio between 1.00 and 3.00 and the sodium borohydride/chitosan molar ratio from 0.50 to 1.00. H-1 NMR spectra signals at 1.0 and 2.5 ppm were used to monitor the reaction system. A quadratic model having significant terms for both molar ratios was found for N-carboxybutylchitosan substitution degree whereas a linear model best describes the substitution degree of 5-methylpyrrolidinone chitosan. Maximum N-carboxybutylchitosan and minimum 5-methylpyrrolidinone chitosan substitution degrees occur for levulinic acid/chitosan molar ratios between 2.00 and 3.00 and a 0.50 for sodium borohydride/chitosan molar ratio. (C) 2004 Elsevier Ltd. All rights reserved.
dc.description59
dc.description1
dc.description37
dc.description42
dc.languageen
dc.publisherElsevier Sci Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationCarbohydrate Polymers
dc.relationCarbohydr. Polym.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectfactorial design
dc.subjectresponse surface analysis
dc.subjectchitosan
dc.subjectN-carboxybutylchitosan
dc.subject5-methylpyrrolidinone chitosan
dc.subjectChitosan
dc.subjectDerivatives
dc.subjectChitin
dc.title3(2) Factorial design and response surface analysis optimization of N-carboxybutylchitosan synthesis
dc.typeArtículos de revistas


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