Effect of acetic acid treatment on isoflavones and carbohydrates in pickled soybean |
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| Affiliation: | 1. CHU/Université de Lille 2, Département de Parasitologie-Mycologie, BDEEP-EA4547, Lille, France;2. Pôle “Biologie Moléculaire” du Centre National de Référence de la Toxoplasmose, Montpellier, France;3. Hôpitaux Universitaires de Strasbourg/Université de Strasbourg, Laboratoire de Parasitologie et Mycologie Médicale, Strasbourg, France;4. CHU de Grenoble/Université Joseph Fourier, Laboratoire de Parasitologie et Mycologie, Grenoble, France;5. Université Paris Descartes/Assistance Publique des Hôpitaux de Paris, Hôpital Cochin, Département de Parasitologie-Mycologie, Paris, France;6. CHU de Dijon/Université de Bourgogne, Département de Parasitologie-Mycologie, Dijon, France;7. CHRU/Université Montpellier 1, Département de Parasitologie-Mycologie, Montpellier, France;8. CNRS UMR5290/IRD 224/UM1/UM2 ("MiVEGEC"), Montpellier, France;9. Assistance Publique des Hôpitaux de Paris, Hôpital Pité Salpêtrière - Charles Foix, Laboratoire de Parasitologie et Mycologie, Paris, France;10. CHU de Toulouse, Département de Parasitologie-Mycologie, Toulouse, France;1. Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, Punjab, India;2. BioPlasma Group, Dublin Institute of Technology, Dublin 1, Ireland;3. Department of Food Biosciences, Teagasc Food Research Centre, Ashtown, Dublin, Ireland;4. School of Chemical Engineering, University of New South Wales, Australia |
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| Abstract: | Acetic acid treatment improves the physical, chemical, and physiological properties of soybeans. This study investigated the changes in isoflavone and carbohydrate profiles in four soybean cultivars subjected to different acetic acid treatment durations. The sum of total isoflavone content of the pickled soybeans and the pickling solution was increased by 30–93% after acetic acid treatment for 30 days. In the comparison to four isoflavone groups of the untreated soybean, malonyl glucosides were decreased by 17–41%, whereas glucosides were increased by 54–160% in the pickled soybeans. In particular, aglucones were found in the pickled soybeans, but not in the untreated soybeans. Following acetic acid treatment, the total carbohydrate content in the pickled soybeans was 50–65% less than that of untreated soybeans. In particular, oligosaccharides and sucrose in the pickled soybeans decreased significantly (> 50%) within the first 24 h. This study provides important information on the changes in isoflavone and certain carbohydrates profiles during soybean pickling, and may be useful to produce functional soybean-based foods containing more bioactive compounds. |
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