Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C

Detalhes bibliográficos
Autor(a) principal: Beninca,C.
Data de Publicação: 2008
Outros Autores: Demiate,I. M., Lacerda,L. G., Carvalho Filho,M. A. S., Ionashiro,M., Schnitzler,E.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Eclética Química
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702008000300002
Resumo: Unprocessed native starches are structurally too weak and functionally too restricted for application in today's advanced food technologies. Processing is necessary to engender a range of functionality. Naturals or natives starches can be modified by using several methods physical, chemical, enzymatic or combined, according industrial purposes. In this work, native corn starch was hydrolyzed by hydrochloric acid solution and investigated by using thermoanalytical techniques (thermogravimetry - TG, differential thermal analysis - DTA and differential scanning calorimetry - DSC), as well as optical microscopy and X-ray diffractometry. After acid treatment at 30 and 50°C, a decrease of gelatinization enthalpy (ΔHgel) was verified. Optical microscopy and X-ray diffractometry allowed us to verify the granules contorn and rugosity typical of cereal starches.
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spelling Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°CCorn starchTGDTADSCgelatinizationUnprocessed native starches are structurally too weak and functionally too restricted for application in today's advanced food technologies. Processing is necessary to engender a range of functionality. Naturals or natives starches can be modified by using several methods physical, chemical, enzymatic or combined, according industrial purposes. In this work, native corn starch was hydrolyzed by hydrochloric acid solution and investigated by using thermoanalytical techniques (thermogravimetry - TG, differential thermal analysis - DTA and differential scanning calorimetry - DSC), as well as optical microscopy and X-ray diffractometry. After acid treatment at 30 and 50°C, a decrease of gelatinization enthalpy (ΔHgel) was verified. Optical microscopy and X-ray diffractometry allowed us to verify the granules contorn and rugosity typical of cereal starches.Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP2008-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702008000300002Eclética Química v.33 n.3 2008reponame:Eclética Químicainstname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)instacron:UNESP10.1590/S0100-46702008000300002info:eu-repo/semantics/openAccessBeninca,C.Demiate,I. M.Lacerda,L. G.Carvalho Filho,M. A. S.Ionashiro,M.Schnitzler,E.eng2008-10-28T00:00:00Zoai:scielo:S0100-46702008000300002Revistahttp://revista.iq.unesp.br/ojs/index.php/ecletica/PUBhttps://revista.iq.unesp.br/ojs/index.php/ecletica/oaiecletica@ctrlk.com.br||ecletica@iq.unesp.br1678-46181678-4618opendoar:2008-10-28T00:00Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)false
dc.title.none.fl_str_mv Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
title Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
spellingShingle Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
Beninca,C.
Corn starch
TG
DTA
DSC
gelatinization
title_short Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
title_full Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
title_fullStr Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
title_full_unstemmed Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
title_sort Thermal behavior of corn starch granules modified by acid treatment at 30 and 50°C
author Beninca,C.
author_facet Beninca,C.
Demiate,I. M.
Lacerda,L. G.
Carvalho Filho,M. A. S.
Ionashiro,M.
Schnitzler,E.
author_role author
author2 Demiate,I. M.
Lacerda,L. G.
Carvalho Filho,M. A. S.
Ionashiro,M.
Schnitzler,E.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Beninca,C.
Demiate,I. M.
Lacerda,L. G.
Carvalho Filho,M. A. S.
Ionashiro,M.
Schnitzler,E.
dc.subject.por.fl_str_mv Corn starch
TG
DTA
DSC
gelatinization
topic Corn starch
TG
DTA
DSC
gelatinization
description Unprocessed native starches are structurally too weak and functionally too restricted for application in today's advanced food technologies. Processing is necessary to engender a range of functionality. Naturals or natives starches can be modified by using several methods physical, chemical, enzymatic or combined, according industrial purposes. In this work, native corn starch was hydrolyzed by hydrochloric acid solution and investigated by using thermoanalytical techniques (thermogravimetry - TG, differential thermal analysis - DTA and differential scanning calorimetry - DSC), as well as optical microscopy and X-ray diffractometry. After acid treatment at 30 and 50°C, a decrease of gelatinization enthalpy (ΔHgel) was verified. Optical microscopy and X-ray diffractometry allowed us to verify the granules contorn and rugosity typical of cereal starches.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702008000300002
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702008000300002
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-46702008000300002
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP
publisher.none.fl_str_mv Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP
dc.source.none.fl_str_mv Eclética Química v.33 n.3 2008
reponame:Eclética Química
instname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Eclética Química
collection Eclética Química
repository.name.fl_str_mv Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)
repository.mail.fl_str_mv ecletica@ctrlk.com.br||ecletica@iq.unesp.br
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