Morphology and structure of acorn starches isolated by enzymatic and alkaline methods

Morphology and structure of starch from fruits of two acorns species, Quercus rotundifolia Lam. (QR) and Quercus suber Lam. (QS), isolated by enzymatic (ENZ) and alkaline (A3S) methods were studied. Acorn starches granules presented a round and oval shape, consisting of medium/small granules, with a...

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Autores principales:	Correia Paula M. R., Cruz-Lopes Luísa, Beirão-da-Costa Luísa
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	acorn starch morphology x-ray diffraction ftir nmr Agriculture S Agriculture (General) S1-972
Acceso en línea:	https://doaj.org/article/16df45d65b0545a3b6dff07442b94d9c
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spelling	oai:doaj.org-article:16df45d65b0545a3b6dff07442b94d9c2021-12-05T14:10:59ZMorphology and structure of acorn starches isolated by enzymatic and alkaline methods2391-953110.1515/opag-2021-0214https://doaj.org/article/16df45d65b0545a3b6dff07442b94d9c2021-02-01T00:00:00Zhttps://doi.org/10.1515/opag-2021-0214https://doaj.org/toc/2391-9531Morphology and structure of starch from fruits of two acorns species, Quercus rotundifolia Lam. (QR) and Quercus suber Lam. (QS), isolated by enzymatic (ENZ) and alkaline (A3S) methods were studied. Acorn starches granules presented a round and oval shape, consisting of medium/small granules, with a mean granule size ranging between 9 and 13 µm. Isolated acorn starches appear as light grayish-brown in naked eye, with high values of L* for starches isolated by the ENZ method, and QR starches were duller than QS. No differences were observed for all the samples in FTIR spectra results. Acorn starches showed a C-type pattern, with a relative crystallinity between 43.1 and 46.6%. The 13C CP/MAS NMR spectra are different for the used isolation methods but are similar for both acorn species. However, acorn-isolated starches presented a predominant A-type allomorph packing type, and the A3S starches showed a higher degree of crystalline material. Those differences in the structure of acorn starches would be helpful to better understand the relationships among structure and functional properties for a possible potential industrial application of chestnut starches.Correia Paula M. R.Cruz-Lopes LuísaBeirão-da-Costa LuísaDe Gruyterarticleacorn starchmorphologyx-ray diffractionftirnmrAgricultureSAgriculture (General)S1-972ENOpen Agriculture, Vol 6, Iss 1, Pp 37-46 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acorn starch morphology x-ray diffraction ftir nmr Agriculture S Agriculture (General) S1-972
spellingShingle	acorn starch morphology x-ray diffraction ftir nmr Agriculture S Agriculture (General) S1-972 Correia Paula M. R. Cruz-Lopes Luísa Beirão-da-Costa Luísa Morphology and structure of acorn starches isolated by enzymatic and alkaline methods
description	Morphology and structure of starch from fruits of two acorns species, Quercus rotundifolia Lam. (QR) and Quercus suber Lam. (QS), isolated by enzymatic (ENZ) and alkaline (A3S) methods were studied. Acorn starches granules presented a round and oval shape, consisting of medium/small granules, with a mean granule size ranging between 9 and 13 µm. Isolated acorn starches appear as light grayish-brown in naked eye, with high values of L* for starches isolated by the ENZ method, and QR starches were duller than QS. No differences were observed for all the samples in FTIR spectra results. Acorn starches showed a C-type pattern, with a relative crystallinity between 43.1 and 46.6%. The 13C CP/MAS NMR spectra are different for the used isolation methods but are similar for both acorn species. However, acorn-isolated starches presented a predominant A-type allomorph packing type, and the A3S starches showed a higher degree of crystalline material. Those differences in the structure of acorn starches would be helpful to better understand the relationships among structure and functional properties for a possible potential industrial application of chestnut starches.
format	article
author	Correia Paula M. R. Cruz-Lopes Luísa Beirão-da-Costa Luísa
author_facet	Correia Paula M. R. Cruz-Lopes Luísa Beirão-da-Costa Luísa
author_sort	Correia Paula M. R.
title	Morphology and structure of acorn starches isolated by enzymatic and alkaline methods
title_short	Morphology and structure of acorn starches isolated by enzymatic and alkaline methods
title_full	Morphology and structure of acorn starches isolated by enzymatic and alkaline methods
title_fullStr	Morphology and structure of acorn starches isolated by enzymatic and alkaline methods
title_full_unstemmed	Morphology and structure of acorn starches isolated by enzymatic and alkaline methods
title_sort	morphology and structure of acorn starches isolated by enzymatic and alkaline methods
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/16df45d65b0545a3b6dff07442b94d9c
work_keys_str_mv	AT correiapaulamr morphologyandstructureofacornstarchesisolatedbyenzymaticandalkalinemethods AT cruzlopesluisa morphologyandstructureofacornstarchesisolatedbyenzymaticandalkalinemethods AT beiraodacostaluisa morphologyandstructureofacornstarchesisolatedbyenzymaticandalkalinemethods
_version_	1718371524668293120

Morphology and structure of acorn starches isolated by enzymatic and alkaline methods

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