Penambahan Serbuk Kelopak Bunga Rosela (Hibiscus sabdariffa L.) untuk Meningkatkan Aktivitas Antioksidan pada Tempe Kedelai
(Additions Powder Flowers of Rosella Calyx (Hibiscus sabdariffa L.) to Increase Antioxidant Activity in Soybean Tempeh)
Penambahan Serbuk Kelopak Bunga Rosela (Hibiscus sabdariffa L.) untuk Meningkatkan Aktivitas Antioksidan pada Tempe Kedelai
(Additions Powder Flowers of Rosella Calyx (Hibiscus sabdariffa L.) to Increase Antioxidant Activity in Soybean Tempeh)
Nopiana Elia Putri Sitanggang
Program Studi Biologi, Fakultas Biologi, Universitas Kristen Satya Wacana, Indonesia
Lusiawati Dewi
Program Studi Biologi, Fakultas Biologi, Universitas Kristen Satya Wacana, Indonesia
DOI: https://doi.org/10.19184/j-agt.v16i02.31068
ABSTRACT
Tempeh is a traditional food product made from soybeans through a fermentation process by tempeh mold (Rhizopus sp.). This food product besides having high nutritional value also contains antioxidant compounds which are very good for consumption but with a relatively low IC50 value. This study used rosella flower calyx (Hibiscus sabdariffa L.) which are believed to have a high enough antioxidant content so they are effective in increasing the antioxidant content in tempeh. Furthermore, the addition of rosella calyx powder will give tempeh an attractive taste, aroma, and color. The objective of this research was to determine the effect of rosella calyx powder addition on tempeh making with various concentrations, i.e. 0% (P0), 0.5% (P2), 1% (P3), 1.5% (P4), and 2% (P5). The antioxidant activity using the DPPH method, the organoleptic properties based on the preference level (hedonic) using a questionnaire, and the water content of tempeh based on the principle of gravimetry method were also tested. The result showed that the IC50 value of 2% concentration of rosella calyx powder addition (P5) was 1596.9 ppm. IC50 of the P5 treatment was the highest antioxidant activity power category compared to the other treatment, even though it was still relatively low of antioxidant activity. Then on the organoleptic test, the results showed that the addition of rosella flower calyx powder was able to affect the taste, color, and aroma of tempeh and has no effect on the water content of tempeh.
Keywords: antioxidant, organoleptic, rosela, tempeh, water content
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Published
20-12-2022
Issue
Vol. 16 No. 2 2022: Jurnal Agroteknologi
Pages
176-185
License
Copyright (c) 2022 Jurnal Agroteknologi
How to Cite
Sitanggang, N.E.P. & Dewi, L. (2022). Penambahan serbuk kelopak bunga rosela (Hibiscus sabdariffa L.) untuk meningkatkan aktivitas antioksidan pada tempe kedelai. Jurnal Agroteknologi, 16(2), 176-185. https://doi.org/10.19184/j-agt.v16i02.31068