Abstract

This study was to investigate the production of reducing sugars in hydrolysates from raw and deoiled Laminaria japonica produced by subcritical water hydrolysis. Deoiled Laminaria japonica was collected by supercritical carbon dioxide (SCO2) extraction process. Experiments were performed in a batch-type reactor with stirring. It investigated that the effects of reaction temperature and acetic acid as catalyst on content of reducing sugar production. The addition of acetic acid led to an increase in content of reducing sugar. But Removal of oil in Laminaria japonica by SCO2 and increasing of temperature led to decrease in content of reducing sugar production. The highest content of reducing sugar was 814.10mg/100g raw dried sample at 200°C, adding of 1% acetic acid as catalyst.

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