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 alpha-amylase and glucoamylase at 35 degrees C for 16 h and then chemically modified...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English English |
| Published: |
American Chemical Society
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/14147/1/Dual%20modification%20of%20starch%20via%20partial%20enzymatic%20hydrolysis%20in%20the%20granular%20state%20and%20subsequent%20hydroxypropylation.pdf |
| _version_ | 1825945372818669568 |
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| author | Karim, A.A. E.H., Sufha Sarker, Zaidul Islam |
| author_facet | Karim, A.A. E.H., Sufha Sarker, Zaidul Islam |
| author_sort | Karim, A.A. |
| collection | UPM |
| 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 alpha-amylase and glucoamylase at 35 degrees 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. |
| first_indexed | 2024-03-06T07:30:28Z |
| format | Article |
| id | upm.eprints-14147 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:30:28Z |
| publishDate | 2008 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | upm.eprints-141472015-09-28T03:40:12Z http://psasir.upm.edu.my/id/eprint/14147/ Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation. Karim, A.A. E.H., Sufha Sarker, Zaidul Islam 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 alpha-amylase and glucoamylase at 35 degrees 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 2008-11 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/14147/1/Dual%20modification%20of%20starch%20via%20partial%20enzymatic%20hydrolysis%20in%20the%20granular%20state%20and%20subsequent%20hydroxypropylation.pdf Karim, A.A. and E.H., Sufha and Sarker, 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 10.1021/jf8015442 English |
| spellingShingle | Karim, A.A. E.H., Sufha Sarker, Zaidul Islam Dual modification of starch via partial enzymatic hydrolysis in the granular state and subsequent hydroxypropylation. |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/14147/1/Dual%20modification%20of%20starch%20via%20partial%20enzymatic%20hydrolysis%20in%20the%20granular%20state%20and%20subsequent%20hydroxypropylation.pdf |
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