dc.creator | dos Santos, KSCR | |
dc.creator | Silva, HSRC | |
dc.creator | Ferreira, EI | |
dc.creator | Bruns, RE | |
dc.date | 2005 | |
dc.date | 37622 | |
dc.date | 2014-11-16T08:38:14Z | |
dc.date | 2015-11-26T16:21:21Z | |
dc.date | 2014-11-16T08:38:14Z | |
dc.date | 2015-11-26T16:21:21Z | |
dc.date.accessioned | 2018-03-28T23:03:22Z | |
dc.date.available | 2018-03-28T23:03:22Z | |
dc.identifier | Carbohydrate Polymers. Elsevier Sci Ltd, v. 59, n. 1, n. 37, n. 42, 2005. | |
dc.identifier | 0144-8617 | |
dc.identifier | WOS:000226439700005 | |
dc.identifier | 10.1016/j.carbpol.2004.08.020 | |
dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/52604 | |
dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/52604 | |
dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/52604 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1267938 | |
dc.description | A 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.description | 59 | |
dc.description | 1 | |
dc.description | 37 | |
dc.description | 42 | |
dc.language | en | |
dc.publisher | Elsevier Sci Ltd | |
dc.publisher | Oxford | |
dc.publisher | Inglaterra | |
dc.relation | Carbohydrate Polymers | |
dc.relation | Carbohydr. Polym. | |
dc.rights | fechado | |
dc.rights | http://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy | |
dc.source | Web of Science | |
dc.subject | factorial design | |
dc.subject | response surface analysis | |
dc.subject | chitosan | |
dc.subject | N-carboxybutylchitosan | |
dc.subject | 5-methylpyrrolidinone chitosan | |
dc.subject | Chitosan | |
dc.subject | Derivatives | |
dc.subject | Chitin | |
dc.title | 3(2) Factorial design and response surface analysis optimization of N-carboxybutylchitosan synthesis | |
dc.type | Artículos de revistas | |