Extract mesquite as alternative source for production bacterial cellulose

Detalhes bibliográficos
Autor(a) principal: ElÃgenes Sampaio do Nascimento
Data de Publicação: 2014
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFC
Texto Completo: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12079
Resumo: Bacterial cellulose (BC) is a naturally nanoscale biomaterial with high purity and excellent chemical and mechanical properties. There are several sugar-rich renewable sources and wastes that can be used as alternative media for bacterial cellulose production.The aim of this study was to evaluate the suitability of an extract of mesquite pods as an alternative carbohydrate source for the production of BC through fermentation by Gluconacetobacter hansenii. The amount of sugars, soluble solids, and pH of the extract was characterized. The influence of the initial sugar concentration, pH, and the source of supplementary nitrogen on the fermentation were evaluated. The best production of bacterial cellulose was achieved in the medium with a sugar concentration of 30 g /L, pH 4.0, and supplemented with 10 g /L of yeast extract. The films from the optimized medium were oven dried and characterized by x-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and electron microscopy (SEM). The results were similar to typical bacterial cellulose films produced in the reference medium HS. Thus, it was possible to demonstrate the suitability of mesquite pod aqueous extract to produce BC.
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spelling info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisExtract mesquite as alternative source for production bacterial cellulose Extrato de algaroba como fonte alternativa para produÃÃo de celulose bacteriana2014-02-25Morsyleide de Freitas Rosa82089205768http://lattes.cnpq.br/7670383899259509Maria Valderez Ponte Rocha64669335391http://lattes.cnpq.br/0639546287060338Men de Sà Moreira de Souza Filho16931700359http://lattes.cnpq.br/476890137557919997587168320ElÃgenes Sampaio do NascimentoUniversidade Federal do CearÃPrograma de PÃs-GraduaÃÃo em Engenharia QuÃmicaUFCBRbacterial cellulose, mesquite, fermentationENGENHARIA QUIMICABacterial cellulose (BC) is a naturally nanoscale biomaterial with high purity and excellent chemical and mechanical properties. There are several sugar-rich renewable sources and wastes that can be used as alternative media for bacterial cellulose production.The aim of this study was to evaluate the suitability of an extract of mesquite pods as an alternative carbohydrate source for the production of BC through fermentation by Gluconacetobacter hansenii. The amount of sugars, soluble solids, and pH of the extract was characterized. The influence of the initial sugar concentration, pH, and the source of supplementary nitrogen on the fermentation were evaluated. The best production of bacterial cellulose was achieved in the medium with a sugar concentration of 30 g /L, pH 4.0, and supplemented with 10 g /L of yeast extract. The films from the optimized medium were oven dried and characterized by x-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and electron microscopy (SEM). The results were similar to typical bacterial cellulose films produced in the reference medium HS. Thus, it was possible to demonstrate the suitability of mesquite pod aqueous extract to produce BC.A celulose bacteriana (CB) à um biomaterial naturalmente nanomÃtrico, com elevado grau de pureza e excelentes propriedades quÃmicas e mecÃnicas. Existem na natureza fontes renovÃveis e resÃduos ricos em aÃÃcares que despertam um crescente interesse como meios alternativos em substituiÃÃo aos tradicionalmente empregados na produÃÃo de celulose. O objetivo deste estudo foi avaliar o extrato de vagens de algaroba (Prosopis juliflora) como fonte alternativa para produÃÃo de CB atravÃs de fermentaÃÃo por Gluconacetobacter hansenii. O extrato foi caracterizado quanto à quantidade de aÃÃcares, pH e sÃlidos solÃveis. AtravÃs da fermentaÃÃo do extrato foram realizados testes de influÃncia da concentraÃÃo inicial de aÃÃcares, influÃncia do pH e efeito da variaÃÃo da suplementaÃÃo com fonte de nitrogÃnio sobre a produÃÃo de CB. A melhor produÃÃo foi proveniente da fermentaÃÃo do extrato de algaroba diluÃdo a uma concentraÃÃo de aÃÃcares de 30 g/L com pH 4,0 suplementado com 10 g/L de extrato de levedura. As pelÃculas obtidas do extrato com condiÃÃes melhoradas foram secas em estufa e caracterizadas por difraÃÃo de raios x (DRX), espectroscopia de absorÃÃo no infravermelho (FTIR), anÃlise termogravimÃtrica (TGA), calorimetria exploratÃria diferencial (DSC) e microscopia eletrÃnica de varredura (MEV), e apresentaram resultados tÃpicos de celulose bacteriana quando comparados à CB produzida no meio de referÃncia HS. Assim, foi possÃvel mostrar a viabilidade de produÃÃo de CB com extrato aquoso de vagens de algaroba.Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgicohttp://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12079application/pdfinfo:eu-repo/semantics/openAccessporreponame:Biblioteca Digital de Teses e Dissertações da UFCinstname:Universidade Federal do Cearáinstacron:UFC2019-01-21T11:25:17Zmail@mail.com -
dc.title.en.fl_str_mv Extract mesquite as alternative source for production bacterial cellulose
dc.title.alternative.pt.fl_str_mv Extrato de algaroba como fonte alternativa para produÃÃo de celulose bacteriana
title Extract mesquite as alternative source for production bacterial cellulose
spellingShingle Extract mesquite as alternative source for production bacterial cellulose
ElÃgenes Sampaio do Nascimento
bacterial cellulose, mesquite, fermentation
ENGENHARIA QUIMICA
title_short Extract mesquite as alternative source for production bacterial cellulose
title_full Extract mesquite as alternative source for production bacterial cellulose
title_fullStr Extract mesquite as alternative source for production bacterial cellulose
title_full_unstemmed Extract mesquite as alternative source for production bacterial cellulose
title_sort Extract mesquite as alternative source for production bacterial cellulose
author ElÃgenes Sampaio do Nascimento
author_facet ElÃgenes Sampaio do Nascimento
author_role author
dc.contributor.advisor1.fl_str_mv Morsyleide de Freitas Rosa
dc.contributor.advisor1ID.fl_str_mv 82089205768
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/7670383899259509
dc.contributor.referee1.fl_str_mv Maria Valderez Ponte Rocha
dc.contributor.referee1ID.fl_str_mv 64669335391
dc.contributor.referee1Lattes.fl_str_mv http://lattes.cnpq.br/0639546287060338
dc.contributor.referee2.fl_str_mv Men de SÃ Moreira de Souza Filho
dc.contributor.referee2ID.fl_str_mv 16931700359
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/4768901375579199
dc.contributor.authorID.fl_str_mv 97587168320
dc.contributor.author.fl_str_mv ElÃgenes Sampaio do Nascimento
contributor_str_mv Morsyleide de Freitas Rosa
Maria Valderez Ponte Rocha
Men de SÃ Moreira de Souza Filho
dc.subject.eng.fl_str_mv bacterial cellulose, mesquite, fermentation
topic bacterial cellulose, mesquite, fermentation
ENGENHARIA QUIMICA
dc.subject.cnpq.fl_str_mv ENGENHARIA QUIMICA
dc.description.sponsorship.fl_txt_mv Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico
dc.description.abstract.por.fl_txt_mv Bacterial cellulose (BC) is a naturally nanoscale biomaterial with high purity and excellent chemical and mechanical properties. There are several sugar-rich renewable sources and wastes that can be used as alternative media for bacterial cellulose production.The aim of this study was to evaluate the suitability of an extract of mesquite pods as an alternative carbohydrate source for the production of BC through fermentation by Gluconacetobacter hansenii. The amount of sugars, soluble solids, and pH of the extract was characterized. The influence of the initial sugar concentration, pH, and the source of supplementary nitrogen on the fermentation were evaluated. The best production of bacterial cellulose was achieved in the medium with a sugar concentration of 30 g /L, pH 4.0, and supplemented with 10 g /L of yeast extract. The films from the optimized medium were oven dried and characterized by x-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and electron microscopy (SEM). The results were similar to typical bacterial cellulose films produced in the reference medium HS. Thus, it was possible to demonstrate the suitability of mesquite pod aqueous extract to produce BC.
A celulose bacteriana (CB) à um biomaterial naturalmente nanomÃtrico, com elevado grau de pureza e excelentes propriedades quÃmicas e mecÃnicas. Existem na natureza fontes renovÃveis e resÃduos ricos em aÃÃcares que despertam um crescente interesse como meios alternativos em substituiÃÃo aos tradicionalmente empregados na produÃÃo de celulose. O objetivo deste estudo foi avaliar o extrato de vagens de algaroba (Prosopis juliflora) como fonte alternativa para produÃÃo de CB atravÃs de fermentaÃÃo por Gluconacetobacter hansenii. O extrato foi caracterizado quanto à quantidade de aÃÃcares, pH e sÃlidos solÃveis. AtravÃs da fermentaÃÃo do extrato foram realizados testes de influÃncia da concentraÃÃo inicial de aÃÃcares, influÃncia do pH e efeito da variaÃÃo da suplementaÃÃo com fonte de nitrogÃnio sobre a produÃÃo de CB. A melhor produÃÃo foi proveniente da fermentaÃÃo do extrato de algaroba diluÃdo a uma concentraÃÃo de aÃÃcares de 30 g/L com pH 4,0 suplementado com 10 g/L de extrato de levedura. As pelÃculas obtidas do extrato com condiÃÃes melhoradas foram secas em estufa e caracterizadas por difraÃÃo de raios x (DRX), espectroscopia de absorÃÃo no infravermelho (FTIR), anÃlise termogravimÃtrica (TGA), calorimetria exploratÃria diferencial (DSC) e microscopia eletrÃnica de varredura (MEV), e apresentaram resultados tÃpicos de celulose bacteriana quando comparados à CB produzida no meio de referÃncia HS. Assim, foi possÃvel mostrar a viabilidade de produÃÃo de CB com extrato aquoso de vagens de algaroba.
description Bacterial cellulose (BC) is a naturally nanoscale biomaterial with high purity and excellent chemical and mechanical properties. There are several sugar-rich renewable sources and wastes that can be used as alternative media for bacterial cellulose production.The aim of this study was to evaluate the suitability of an extract of mesquite pods as an alternative carbohydrate source for the production of BC through fermentation by Gluconacetobacter hansenii. The amount of sugars, soluble solids, and pH of the extract was characterized. The influence of the initial sugar concentration, pH, and the source of supplementary nitrogen on the fermentation were evaluated. The best production of bacterial cellulose was achieved in the medium with a sugar concentration of 30 g /L, pH 4.0, and supplemented with 10 g /L of yeast extract. The films from the optimized medium were oven dried and characterized by x-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and electron microscopy (SEM). The results were similar to typical bacterial cellulose films produced in the reference medium HS. Thus, it was possible to demonstrate the suitability of mesquite pod aqueous extract to produce BC.
publishDate 2014
dc.date.issued.fl_str_mv 2014-02-25
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
status_str publishedVersion
format masterThesis
dc.identifier.uri.fl_str_mv http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12079
url http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12079
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal do CearÃ
dc.publisher.program.fl_str_mv Programa de PÃs-GraduaÃÃo em Engenharia QuÃmica
dc.publisher.initials.fl_str_mv UFC
dc.publisher.country.fl_str_mv BR
publisher.none.fl_str_mv Universidade Federal do CearÃ
dc.source.none.fl_str_mv reponame:Biblioteca Digital de Teses e Dissertações da UFC
instname:Universidade Federal do Ceará
instacron:UFC
reponame_str Biblioteca Digital de Teses e Dissertações da UFC
collection Biblioteca Digital de Teses e Dissertações da UFC
instname_str Universidade Federal do Ceará
instacron_str UFC
institution UFC
repository.name.fl_str_mv -
repository.mail.fl_str_mv mail@mail.com
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