Eriyanto Yusnawan
Indonesia Legumes and Tuber Crops Research Institute

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Journal : Buletin Palawija

Changes of Chemical Composition and Aflatoxin Content of Peanut Products as Affected by Processing Methods Erliana Ginting; Agustina Asri Rahmianna; Eriyanto Yusnawan
Buletin Palawija Vol 17, No 2 (2019): Buletin Palawija Vol 17 no 2, 2019
Publisher : Balai Penelitian Tanaman Aneka Kacang dan Umbi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bulpa.v17n2.2019.p73-82

Abstract

Peanut production in Indonesia is predominantly used for food, thus information on nutritional aspects and aflatoxin contamination in peanuts is essential in terms of food security and safety. As changes may occur during processing, the effects of processing methods on chemical composition and aflatoxin content in selected peanut products were studied. The dried peanut pods collected from a farmer in Ponorogo, East Java were stored for one month, and then the kernels were prepared into fried peanut (kacang goreng), peanut sauce (sambel pecel), peanut press cake (bungkil kacang), fried-pressed peanut (bungkil kacang goreng), fermented peanut press cake (tempe bungkil kacang), and fried peanut tempe (tempe bungkil kacang goreng). The trial was arranged in a randomized complete design with three replicates. ELISA method was applied for aflatoxin B1 analysis. The results showed that peanut kernels contained 26.3% protein (dw) and 50.4% fat (dw) with relatively low aflatoxin B1 content (9.1 ppb) due to low moisture level (5.6%), no Aspergillus flavus infection and high sound/intact kernels (73.1%). Peanuts processed into tempe bungkil kacang showed the highest increase in protein content, followed by tempe bungkil kacang goreng, bungkil kacang, and bungkil kacang goreng, while fat contents decreased in all products. Processing into kacang goreng and bungkil kacang goreng decreased aflatoxin B1 by 26.4% and 41.8%, respectively, while no significant differences were noted in sambal pecel and bungkil kacang. Aflatoxin B1 increased two-fold during the preparation of tempe bungkil kacang, however it significantly decreased by 38.9% after deep-fried. Excluding peanut tempe, all peanut products contained aflatoxin B1 below the permitted level (15 ppb), therefore they are safe for consumption.
Total Phenolic Content and Antioxidant Activity of Mung bean Seed Cultivars from Optimized Extraction Treatment Eriyanto Yusnawan; Sutrisno Sutrisno; Afandi Kristiono
Buletin Palawija Vol 17, No 1 (2019): Buletin Palawija Vol 17 no 1, 2019
Publisher : Balai Penelitian Tanaman Aneka Kacang dan Umbi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bulpa.v17n1.2019.p1-9

Abstract

Secondary metabolites are produced by plants both during normal growth and under biotic and abiotic stresses. Apart from genetic and environmental factors, the secondary metabolite contents are also influenced by analytical methods. The aims of this study were to obtain suitable solvents and extraction treatments which produced high total flavonoid and phenolic contents as well as antioxidant activity in shiny and dull green mung beans. An extraction of 0.5 g sample with grade 80 mesh in 70% acetone was selected to estimate the contents of total flavonoids and phenolics. A treatment of shaking the sample in 70% acetone (1:10 w/v) for 2 h and followed by 18 h of maceration with twice extractions showed the highest amounts of flavonoid as well as phenolic contents. Total flavonoid and phenolic contents of 14 mung bean cultivars ranged from 1.28 to 2.35 mg CE/g and 3.74 to 6.58 mg GAE/g, respectively. Antioxidant activity represented by percentage of DPPH inhibition varied from 66.8 to 91.5%. A dull green mung bean cultivar Vima 1 had the highest total flavonoid and phenolic contents (2.35 mg CE/g and 6.58 mg GAE/g). Antioxidant activity of Vima 1 cultivar (91.5%) was not different from those of Perkutut (91.5%), Murai (90.1%) and Sriti (88.9%). The small quantity of sample (0.5 g) combined with the simple extraction treatment was effective in quantifying the different contents of total flavonoids and phenolics in mung bean seeds.