TITLE:
Comparative Study of Inulin Extracts from Dahlia, Yam, and Gembili Tubers as Prebiotic
AUTHORS:
Elok Zubaidah, Wilda Akhadiana
KEYWORDS:
Prebiotic; Inulin; Dahlia Tubers; Yam Tubers; Gembili Tubers
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.4 No.11A,
November
1,
2013
ABSTRACT:
The addition of
prebiotic in food today is mostly done. It is based on the ability of prebiotic
to support the growth of probiotic. Inulin is a carbohydrate that serves as an effective prebiotic that cannot
be digested by digestive enzymes. The purpose of this research is to assess utilization
of inulin from several types of tubers include dahlia tubers, yam tu- bers, and gembili tubers as a source of prebiotic that tested in probiotic bacteria (L. casei and L. plantarum). The
study used a Randomized Block Design method with two factors, the type of probiotic isolate and inulin extract from tubers. The result shows that the best
treatment is isolates of L. casei obtained in the fermentation medium with the addition of inulin
from gembili tubers. The best treatment has the following characteristics: an increase in total
LAB 2.71 × 1010 cfu/ml, 1.50% total acid, pH 2.05 and the total sugars
are 3.11%. Whereas in isolates of L.
plantarum, the best treatment in the fermentation medium is with the
addition of inulin from dahlia tubers. The LAB reaches 2.80 × 1010 cfu/ml, 1.29% total acid, pH 2.24 and 2.05%
total sugars.