Effect of Temperature and Drying Time on Angiostensin Converting Enzyme (ACE) Inhibitor and Antioxidant Activity of Soybean (Glycine max L.)- Jackbean (Canavalia ensiformis L.) Mix Grains Tempeh Flour

https://doi.org/10.22146/ifnp.53535

Diah Ayu Puspasari(1*), Andriati Ningrum(2), Sri Anggrahini(3)

(1) Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada
(2) Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada
(3) Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada
(*) Corresponding Author

Abstract


The increase of hypertension sufferers encourage the development of functional foods. The presence of tempeh mixed grains of soybean and jackbean contains bioactive peptides as antihypertensive and antioxidant agents encourage the development of functional food such as tempeh flour of mixed grains. The research was aimed to investigate the effect of temperature and drying time on functional properties, asam amino acid profile, and isoflavone compounds. The different drying temperatures (50oC and 70oC) and drying time  (6; 8; and 10 h) were applied on soybean and jackbean tempeh (1:1) w/w) for making the mixed grains tempeh flour. The Angiotensin Converting Enzyme (ACE) inhibitor activity, antioxidant activity, and total phenolic, amino acids profile, and isoflavone content of the flour were analyzed. The result showed that the best tempeh flour of mixed grains was obtained by drying at 70°C for 8 h with ACE inhibitor activity of 86.04%, antioxidant activity of 55.34% and total phenolic of 3.98 mg/g DB. This flour contained amino acids related to ACE-Inhibitor peptide precursors (glutamic acid and leucine), antioxidant peptide precursors (phenylalanine and histidine) as well as isoflavone compounds (daidzein and genistein). This finding reveals that drying temperature and time affected the functional properties, amino acids profile and isoflavone compounds.

Keywords


Angiotensin Converting Enzyme Inhibitor; Antioxidant; Isoflavon; Jackbean; Mixed grains; Tempeh flour

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DOI: https://doi.org/10.22146/ifnp.53535

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Indonesian Food and Nutrition Progress (print ISSN 0854-6177, online ISSN 2597-9388) is published by the Indonesian Association of Food Technologist in collaboration with Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada.

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