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SUBSTITUSI TEPUNG UBI JALAR KUNING DAN UNGU (Ipomea batatas . L) TERHADAP TERIGU PADA PEMBUATAN BISKUIT GABIN DAN PERUBAHAN MUTU SETELAH PENIMPANAN
ABSTRACT
DESY NURSAYEKTI. Agriculture Faculty, Mulawarman University, 2016.
Sweet Potato Flour (Ipomea batatas .L) Substitution to Wheat Flour on Gabin Biscuit and Quality Change after Storage (Supervised by Sukmiyati Agustin and Anton Rahmadi).
This study aimed to determine on the sensory and chemical properties of the gabin biscuit produced and to determined quality change after two months of storage using 0,5 mm polypropilen plastic. This research was conducted on Mei - September 2015 in Agricultural Faculty of Mulawarman University.
This study used Completely Randomized Design (CRD) with single factor which consist of ten treatments and two replications. The treatment used in this study was sweet potato flour substitution to wheat flour. Leveled at 10 : 90, 20 : 80, 30 : 70 , 40 : 60 , and 50 : 50.
The results showed that the sweet potato flour substitution to wheat flour in gabin processing significantly affected water content, ashes content, protein content, fat content, fiber content and sensory properties of gabin. The sweet potato flour substitution to wheat flour to produce the best sensory quality of gabin by using yellow sweet potato flour and wheat flour 30 : 70, with hedonic characteristics as follow : texture (bit crunchy), aroma (rather scented sweet potato) and taste (like-sweet potato) with water content 3,76%, ashes content 1,29%, protein content 9,44%, fat content 11,40%, fiber content 1,35%. Quality change after two months of storage in hedonic characteristics as follow : texture (bit crunchy) and taste (little taste of sweet potato) with water content 4,40%, ashes content 1,31%, protein content 9,42%, fat content 11,42%, fiber content 1,37%.
Key words : sweet potato, gabin biscuit, storage.
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