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. Hardoko
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Agriculture, Biological Sciences & Forestry Industrial & Manufacturing Engineering

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PEMANFAATAN UBI JALAR UNGU (Ipomoea batatas L. Poir) SEBAGAI PENGGANTI SEBAGIAN TEPUNG TERIGU DAN SUMBER ANTIOKSIDAN PADA ROTI TAWAR [Purple Sweet Potato (Ipomoea batatas L. Poir) as a Partial Subtitute of Wheat flour and Source of Antioxidant on Pla . Hardoko; Liana Hendarto; Tagor Marsillam Siregar
Jurnal Teknologi dan Industri Pangan Vol. 21 No. 1 (2010): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

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Abstract

       Purple sweet potato (Ipomoea batatas L. Poir) is potential for functional food, especially as antioxidant source due to its purple color and other nutrient content. The objective of this research was  to produce plain bread containing antioxidant by partial substitution of wheat flour with purple sweet potato flour. The result showed that the best plain bread was produced by a maximum substitution of 20% purple sweet potato flour to wheat flour. The hedonic characteristics of the resulting bread including aroma, taste, and texture were not significantly different from bread without substitution. Nevertheless, the crust was harder and darker. Addition of 1.0% GMS emulsifier and reduction of purple potato flour to 15% increased the score of softness, hedonic  texture, acceptance level, as well as the volume of the bread. The substituted bread had  antioxidant activity of 55833.78 ppm DPPH as shown by the IC50 value and contained  4.30% of dietary fiber.
Co-Authors Liana Hendarto Tagor Marsillam Siregar