Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments

Talipot starch, a non-conventional starch source with a high yield (76%) from the stem pith of talipot palm (<i>Corypha umbraculifera</i> L.) was subjected to three different thermal treatments (dry-heat, heat-moisture and autoclave treatments) prior to phosphorylation. Upon dual modific...

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Autores principales:	Basheer Aaliya, Kappat Valiyapeediyekkal Sunooj, Chillapalli Babu Sri Rajkumar, Muhammed Navaf, Plachikkattu Parambil Akhila, Cherakkathodi Sudheesh, Johnsy George, Maximilian Lackner
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	talipot starch non-conventional starch dry-heat treatment heat-moisture treatment autoclave treatment chemical modification Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/dbf4e7d7f05e4b69b9405594ad7aa4ff
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spelling	oai:doaj.org-article:dbf4e7d7f05e4b69b9405594ad7aa4ff2021-11-11T18:49:16ZEffect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments10.3390/polym132138552073-4360https://doaj.org/article/dbf4e7d7f05e4b69b9405594ad7aa4ff2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3855https://doaj.org/toc/2073-4360Talipot starch, a non-conventional starch source with a high yield (76%) from the stem pith of talipot palm (<i>Corypha umbraculifera</i> L.) was subjected to three different thermal treatments (dry-heat, heat-moisture and autoclave treatments) prior to phosphorylation. Upon dual modification of starch with thermal treatments and phosphorylation, the phosphorous content and degree of crosslinking significantly increased (<i>p</i> ≤ 0.05) and was confirmed by the increased peak intensity of P=O and P–O–C stretching vibrations compared to phosphorylated talipot starch in the FT-IR spectrum. The highest degree of crosslinking (0.00418) was observed in the autoclave pretreated phosphorylated talipot starch sample. Thermal pretreatment remarkably changed the granule morphology by creating fissures and grooves. The amylose content and relative crystallinity of all phosphorylated talipot starches significantly decreased (<i>p</i> ≤ 0.05) due to crosslinking by the formation of phosphodiester bonds, reducing the swelling power of dual-modified starches. Among all modified starches, dry-heat pretreated phosphorylated starch gel showed an improved light transmittance value of 28.4%, indicating reduced retrogradation tendency. Pasting and rheological properties represented that the thermal pretreated phosphorylated starch formed stronger gels that improved thermal and shear resistance. Autoclave treatment before phosphorylation of talipot starch showed the highest resistant starch content of 48.08%.Basheer AaliyaKappat Valiyapeediyekkal SunoojChillapalli Babu Sri RajkumarMuhammed NavafPlachikkattu Parambil AkhilaCherakkathodi SudheeshJohnsy GeorgeMaximilian LacknerMDPI AGarticletalipot starchnon-conventional starchdry-heat treatmentheat-moisture treatmentautoclave treatmentchemical modificationOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3855, p 3855 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	talipot starch non-conventional starch dry-heat treatment heat-moisture treatment autoclave treatment chemical modification Organic chemistry QD241-441
spellingShingle	talipot starch non-conventional starch dry-heat treatment heat-moisture treatment autoclave treatment chemical modification Organic chemistry QD241-441 Basheer Aaliya Kappat Valiyapeediyekkal Sunooj Chillapalli Babu Sri Rajkumar Muhammed Navaf Plachikkattu Parambil Akhila Cherakkathodi Sudheesh Johnsy George Maximilian Lackner Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments
description	Talipot starch, a non-conventional starch source with a high yield (76%) from the stem pith of talipot palm (<i>Corypha umbraculifera</i> L.) was subjected to three different thermal treatments (dry-heat, heat-moisture and autoclave treatments) prior to phosphorylation. Upon dual modification of starch with thermal treatments and phosphorylation, the phosphorous content and degree of crosslinking significantly increased (<i>p</i> ≤ 0.05) and was confirmed by the increased peak intensity of P=O and P–O–C stretching vibrations compared to phosphorylated talipot starch in the FT-IR spectrum. The highest degree of crosslinking (0.00418) was observed in the autoclave pretreated phosphorylated talipot starch sample. Thermal pretreatment remarkably changed the granule morphology by creating fissures and grooves. The amylose content and relative crystallinity of all phosphorylated talipot starches significantly decreased (<i>p</i> ≤ 0.05) due to crosslinking by the formation of phosphodiester bonds, reducing the swelling power of dual-modified starches. Among all modified starches, dry-heat pretreated phosphorylated starch gel showed an improved light transmittance value of 28.4%, indicating reduced retrogradation tendency. Pasting and rheological properties represented that the thermal pretreated phosphorylated starch formed stronger gels that improved thermal and shear resistance. Autoclave treatment before phosphorylation of talipot starch showed the highest resistant starch content of 48.08%.
format	article
author	Basheer Aaliya Kappat Valiyapeediyekkal Sunooj Chillapalli Babu Sri Rajkumar Muhammed Navaf Plachikkattu Parambil Akhila Cherakkathodi Sudheesh Johnsy George Maximilian Lackner
author_facet	Basheer Aaliya Kappat Valiyapeediyekkal Sunooj Chillapalli Babu Sri Rajkumar Muhammed Navaf Plachikkattu Parambil Akhila Cherakkathodi Sudheesh Johnsy George Maximilian Lackner
author_sort	Basheer Aaliya
title	Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments
title_short	Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments
title_full	Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments
title_fullStr	Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments
title_full_unstemmed	Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments
title_sort	effect of thermal pretreatments on phosphorylation of <i>corypha umbraculifera</i> l. stem pith starch: a comparative study using dry-heat, heat-moisture and autoclave treatments
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/dbf4e7d7f05e4b69b9405594ad7aa4ff
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Effect of Thermal Pretreatments on Phosphorylation of <i>Corypha umbraculifera</i> L. Stem Pith Starch: A Comparative Study Using Dry-Heat, Heat-Moisture and Autoclave Treatments

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