Kedelai hitam mengandung berbagai senyawa antioksidan yang bermanfaat bagi kesehatan. Pemanasan dalam pengolahannya diketahui dapat mengubah kandungan gizi, serta aktivitas dan kandungan berbagai senyawa antioksidan. Namun penyangraian dilaporkan mampu meningkatkan aktivitas antioksidan kedelai hitam. Penelitian ini bertujuan mempelajari pengaruh penyangraian terhadap kandungan gizi serta aktivitas dan kandungan senyawa antioksidan kedelai hitam varietas Mallika. Kedelai hitam yang disangrai pada suhu 150 o C dan 200 o C, masing-masing selama 15 dan 30 menit, dan non-sangrai diuji kandungan proksimatnya (kadar air, abu, lemak, protein, karbohidrat by difference, dan serat kasar). Aktivitas antioksidan diukur pada ekstrak etanolik kedelai hitam dengan metode penghambatan radikal DPPH. Ekstrak dengan aktivitas tertinggi kemudian diuji kandungan antioksidannya, yaitu total antosianin dengan metode perbedaan pH, total fenol dengan metode Folin-Ciocalteu, dan total flavonoid dengan metode kolorimetri. Hasil penelitian menunjukkan bahwa penyangraian dapat menurunkan kadar air dan protein, masing-masing pada kisaran 27,47 -79,81% dan 5,73 -15,73%, dan meningkatkan kadar lemak pada kisaran 3,21 -3,81%, kadar abu pada kisaran 0,45 -2,67%, dan meningkatkan proporsi karbohidrat, sedangkan serat kasar meningkat hingga 16,44% pada penyangraian suhu 150 o C, namun menurun pada penyangraian suhu 200 o C. Penyangraian meningkatkan aktivitas antioksidan hingga 82,5% dengan aktivitas tertinggi pada perlakuan 200 o C selama 30 menit. Ekstrak kedelai hitam Mallika hasil penyangraian dengan aktivitas antioksidan tertinggi mengandung total fenol sebesar 56,96 mg GAE/g bahan kering, total flavonoid sebesar 14,39 mg QE/g bahan kering, dan antosianin sebesar 0,125 mg CE /g bahan kering. Dapat disimpulkan bahwa penyangraian pada suhu 200 o C selama 30 menit dapat digunakan untuk mengoptimalkan sifat antioksidatif kedelai hitam Mallika yang bermanfaat bagi kesehatan.
Avocado (Persea americana) is a fruit part of the Lauraceae family, which can be widely found in tropical and subtropical regions. With an annual harvest of more than 300,000 tons in Indonesia and only flesh as edible part, avocado has large byproducts such as skin and seed. The later contains 23% of starch and fat, which can be utilized as an alternative source of starch. This study aimed to examine consumer preference for steamed brownies with avocado seed as additive. Preference was measured using a hedonic test on 55 untrained panelists at a measurable scale of 1-7. Results showed that brownies made by 90 g shredded avocado seed and 80 g wheat flour had the highest hedonic score for color, appearance, texture, aroma, and flavor of 4.4, 4.2, 4.1, 3.75, and 3.7, respectively. These results indicated the possibility to develop a better formula to produce steamed brownies with avocado seed preferable by consumers.
Proses pembuatan kecap pada Pabrik Kecap X masih menggunakan cara semi-tradisional yakni sebagian masih menggunakan tenaga manusia dan lainnya sudah menggunakan mesin (untuk pengemasannya). Oleh karena itu bahaya atau ancaman dapat ditemukan pada proses produksi kecap manis. Metode yang digunakan untuk menganalisi bahaya menggunakan metode HACCP pada proses produksi. Hasilnya dalam proses produksi yang merupakan titik kritis yaitu formulasi, perebusan kacang kedelai hitam, fermentasi koji, fermentasi moromi, dan proses packing produk.
Black soybean roasting at certain temperature and period was reportedly able to increase its antioxidant activity. This research aimed to evaluate black soybean antioxidant properties after processed into soybean milk. After roasting at 200 o C for 30 minutes, roasted and non-roasted black soybean were water-soaked for 12 hours. Soaked beans from both treatments were divided into two parts. First part was steamed for 30 minutes then ground with room temperature water. The second was not steamed but ground with 80 o C water addition. After filtration, soybean milk was subjected to antioxidant activity, total phenolics, total flavonoids, and anthocyanin content analyses. Steamed-roasted soybeans milk had the highest antioxidant activity of 43.608%, but it contained significantly lower phenolics, flavonoids, and anthocyanin than non-roasted beans. Total phenolic compounds, flavonoids, and anthocyanin content of roasted beans were 37.99-33.8%, 15%, 16.57-27.53% lower than those of non-roasted beans, compared in steamed and hot-water added milk. Generally, milk from non-steamed and hot water added beans had higher total phenolics and flavonoids than those from steamed beans, while anthocyanin content remained higher in steamed soybean milk. The results suggested that there was other compounds which responsible on roasted beans antioxidant activity, other than phenolic compounds, flavonoids, and anthocyanin. Comparison of soybean milk processing method indicated than steaming was able to preserve non-phenolics and non-flavonoid antioxidative compounds generated during roasting, whereas 80 o C water addition without steaming might optimize phenolics and flavonoids compound extraction.
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