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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yoo, Sang Ho Kim, Dong Min Lee, Heungsook |
| Copyright Year | 2012 |
| Abstract | Effect of lactic acid bacteria-fermented whey in the soybean soaking process of the soymilk production was investigated to minimize bacterial contamination and increase isoflavone and γ-amino butyric acid (GABA) concentrations. Mixed culture of Lactobacillus acidophilus, Bifidobacterium lactis, and Streptococcus thermophilus displayed the highest β-glucosidase activity and was used for the production of health functional soymilk. A significant pH reduction from 6.75 to 5.19 was observed in soymilk product, whereas its titratable acidity increased from 0.18 to 0.24% after 24-h soaking of soybean in fermented whey. Suspension stability of soymilk dramatically dropped between 18- and 24-h soaking periods, largely due to pH reduction, which reflected decrease in solid contents of soymilk from 7.38 to 1.54%. Total isoflavone content significantly decreased with increasing soaking time in the fermented whey, whereas the content of health-beneficial aglycone increased by three fold (0.27 mg/100 mL of soymilk) after 18-h soaking fermentation. The contents of free amino acids (6.0 mg→2.3 mg/100 mL) and GABA (1.1 mg→0.5 mg) in soymilk were reduced in soymilks produced with the fermented soybeans between 18- and 24-h soaking periods. The pH-drop induced solid precipitation, which could exert negative effect on the free amino acid and GABA contents in fermented soymilk. |
| Starting Page | 121 |
| Ending Page | 126 |
| Page Count | 6 |
| File Format | |
| ISSN | 17382203 |
| Journal | Journal of the Korean Society for Applied Biological Chemistry |
| Volume Number | 55 |
| Issue Number | 1 |
| e-ISSN | 2234344X |
| Language | English |
| Publisher | The Korean Society for Applied Biological Chemistry |
| Publisher Date | 2012-02-29 |
| Publisher Place | Seoul |
| Access Restriction | Subscribed |
| Subject Keyword | isoflavone Applied Microbiology fermentation Biological Techniques soymilk free amino acids γ-amino butyric acid Bioorganic Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Biochemistry, Genetics and Molecular Biology |
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