Citation
Haska N., . and Ohta Y., . (1991) Pretreatment effects on the hydrolysis of sago starch granules by raw starch-digesting amylase from Penicillium brunneum. [Proceedings Paper]
Abstract
Several raw starch-digesting amylases are produced from microorganisms including those isolated from Penicillium brunneum from sago palm. All these enzymes were found to be effective for hydrolysing cereal starches but root starches and sago starch were resistant to their action. Pretreatment of sago starch by heating it to a temperature below gelatinization temperature at lower pHs resulted in an increase in the ability of enzyme to digest sago starch. Heating to 65 percent centigrade at pH 3.5 resulted in a 86 percent conversion of sago starch to glucose compared with a 97 percent conversion of raw corn starch. Treatment of sago starch at 60 degrees centigrade and pH 3.5 increased the degree of hydrolysis to 200 percent compared to untreated sago starch the degree of hydrolysis of which is only 31 percent after 48 hr of incubation. Addition of the enzyme in small portion at various time intervals was found to be more effective in hydrolysing starch 91 percent than adding the total quantity in one bulk 86 percent
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Abstract
Several raw starch-digesting amylases are produced from microorganisms including those isolated from Penicillium brunneum from sago palm. All these enzymes were found to be effective for hydrolysing cereal starches but root starches and sago starch were resistant to their action. Pretreatment of sago starch by heating it to a temperature below gelatinization temperature at lower pHs resulted in an increase in the ability of enzyme to digest sago starch. Heating to 65 percent centigrade at pH 3.5 resulted in a 86 percent conversion of sago starch to glucose compared with a 97 percent conversion of raw corn starch. Treatment of sago starch at 60 degrees centigrade and pH 3.5 increased the degree of hydrolysis to 200 percent compared to untreated sago starch the degree of hydrolysis of which is only 31 percent after 48 hr of incubation. Addition of the enzyme in small portion at various time intervals was found to be more effective in hydrolysing starch 91 percent than adding the total quantity in one bulk 86 percent
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | 2 tables; 8 figs.; 19 refs.; Summary En |
| AGROVOC Term: | SAGU |
| AGROVOC Term: | ALMIDON |
| AGROVOC Term: | HIDROLISIS |
| AGROVOC Term: | PENICILLIUM |
| AGROVOC Term: | AMILOSA/ MICROORGANISMOS |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:26 |
| URI: | http://webagris.upm.edu.my/id/eprint/15022 |
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