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Abstract ▼ AI-Helper

This study was performed to investigate the change of lipoxygenases and urease activities, trypsin inhibitor, tannin and phytic acid contents during heat treatment of Jinpum soybean. The lipoxygenase-1 and urease possessed their activities after heating at $60^{\circ}C$ for 100 min, but t...

This study was performed to investigate the change of lipoxygenases and urease activities, trypsin inhibitor, tannin and phytic acid contents during heat treatment of Jinpum soybean. The lipoxygenase-1 and urease possessed their activities after heating at $60^{\circ}C$ for 100 min, but their activities disappeared rapidly at $80^{\circ}C$ and $100^{\circ}C$ for 20 and 10 min. There were no lipoxygenase-2 and -3 activities in Jinpum soybean with and without heating. Trypsin inhibitor was lost 91.9%, 78,1% and 58.6% of the activity after heat treatment at $100^{\circ}C$ for 50 min, at $80^{\circ}C$ for 100 min and at $60^{\circ}C$ for 100 min, respectively. The tannin content was increased by heat treatment. The content of and phytic acid was increase after heating at $60^{\circ}C$ for 100 min, unchanged at $80^{\circ}C$ for 100 min and decreased at $100^{\circ}C$ for 100 min.

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