Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation

The effect of enzymatic pretreatment on the degree of corn and mung bean starch derivatization by propylene oxide was investigated. The starch was enzymatically treated in the granular state with a mixture of fungal R-amylase and glucoamylase at 35 °C for 16 h and then chemically modified to prod...

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Main Authors:	Al-Jashamy, Karim A., E. H., Sufha, Sarker, Md. Zaidul Islam
Format:	Article
Language:	English
Published:	American Chemical Society 2008
Subjects:	QD Chemistry
Online Access:	http://irep.iium.edu.my/25013/ http://irep.iium.edu.my/25013/ http://irep.iium.edu.my/25013/ http://irep.iium.edu.my/25013/1/JAFC_Karim.pdf

id	iium-25013
recordtype	eprints
spelling	iium-250132013-01-18T08:04:13Z http://irep.iium.edu.my/25013/ Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation Al-Jashamy, Karim A. E. H., Sufha Sarker, Md. Zaidul Islam QD Chemistry The effect of enzymatic pretreatment on the degree of corn and mung bean starch derivatization by propylene oxide was investigated. The starch was enzymatically treated in the granular state with a mixture of fungal R-amylase and glucoamylase at 35 °C for 16 h and then chemically modified to produce enzyme-hydrolyzed-hydroxypropyl (HP) starch. Partial enzyme hydrolysis of starch in the granular state appeared to enhance the subsequent hydroxypropylation, as judged from the significant increase in the molar substitution. A variable degree of granule modification was obtained after enzyme hydrolysis, and one of the determinants of the modification degree appeared to be the presence of natural pores in the granules. Enzyme-hydrolyzed-HP starch exhibited significantly different functional properties compared to hydroxypropyl starch prepared from untreated (native) starch. It is evident that the dual modification of starch using this approach provides a range of functional properties that can be customized for specific applications. American Chemical Society 2008 Article PeerReviewed application/pdf en cc_by_nd http://irep.iium.edu.my/25013/1/JAFC_Karim.pdf Al-Jashamy, Karim A. and E. H., Sufha and Sarker, Md. Zaidul Islam (2008) Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation. Journal of Agricultural and Food Chemistry, 56 (22). pp. 10901-10907. ISSN 0021-8561 http://dx.doi.org/10.1021/jf8015442 doi:10.1021/jf8015442
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Al-Jashamy, Karim A. E. H., Sufha Sarker, Md. Zaidul Islam Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation
description	The effect of enzymatic pretreatment on the degree of corn and mung bean starch derivatization by propylene oxide was investigated. The starch was enzymatically treated in the granular state with a mixture of fungal R-amylase and glucoamylase at 35 °C for 16 h and then chemically modified to produce enzyme-hydrolyzed-hydroxypropyl (HP) starch. Partial enzyme hydrolysis of starch in the granular state appeared to enhance the subsequent hydroxypropylation, as judged from the significant increase in the molar substitution. A variable degree of granule modification was obtained after enzyme hydrolysis, and one of the determinants of the modification degree appeared to be the presence of natural pores in the granules. Enzyme-hydrolyzed-HP starch exhibited significantly different functional properties compared to hydroxypropyl starch prepared from untreated (native) starch. It is evident that the dual modification of starch using this approach provides a range of functional properties that can be customized for specific applications.
format	Article
author	Al-Jashamy, Karim A. E. H., Sufha Sarker, Md. Zaidul Islam
author_facet	Al-Jashamy, Karim A. E. H., Sufha Sarker, Md. Zaidul Islam
author_sort	Al-Jashamy, Karim A.
title	Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation
title_short	Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation
title_full	Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation
title_fullStr	Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation
title_full_unstemmed	Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation
title_sort	dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation
publisher	American Chemical Society
publishDate	2008
url	http://irep.iium.edu.my/25013/ http://irep.iium.edu.my/25013/ http://irep.iium.edu.my/25013/ http://irep.iium.edu.my/25013/1/JAFC_Karim.pdf
first_indexed	2023-09-18T20:37:24Z
last_indexed	2023-09-18T20:37:24Z
_version_	1777409137570742272

Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation

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