Widhyastuti, Nunuk
BIDANG MIKROBIOLOGI PUSAT PENELITIAN BIOLOGI LEMBAGA ILMU PENGETAHUAN INDONESIA

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

PENINGKATAN KADAR PATI RESISTEN TIPE III TEPUNG SINGKONG TERMODIFIKASI MELALUI FERMENTASI DAN PEMANASAN BERTEKANAN-(Improvement Level of Resistant Starch Type III on Modified Cassava Flour Using Fermentation and Autoclaving-Cooling) Setiarto, Raden Haryo Bimo; Widhyastuti, Nunuk; Sumariyadi, Arumsyah
Biopropal Industri Vol 9, No 1 (2018)
Publisher : Balai Riset dan Standardisasi Industri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2706.862 KB)

Abstract

Modified Cassava flour (Mocaf) is a product derived from cassava flour that uses principles of cassava cell modification through fermentation for 12-72 hours. This study aims to improve the levels of resistant starch in cassava flour using lactic acid bacteria fermentation and autoclaving-cooling. Cassava slices fermented with mixed cultures of lactic acid bacteria (Lactobacillus plantarum B-307:Leuconostoc mesenteroides SU-LS 67=1:1) for 18 hours at 37oC. The fermented cassava then autoclaved (121oC, 15 min) and cooled (4oC, 24 hours) for 1-3 cycles. Cassava slices was dried (70oC, 16 hours), grounded and sieved (80 mesh) to obtain modified cassava flour. Combination of autoclaving-cooling and fermentation could increase resistant starch level of Mocaf. Fermentation with 2 cycles of autoclaving-cooling (FAC-2S) produced the highest resistant starch content (12.51%) compared to other treatments. This value was around 4.5-fold higher than the control (2.81%). Increased levels of resistant starch could contribute to decrease the digestibility of Mocaf.Keywords: autoclaving-cooling, fermentation, lactic acid bacteria, modified cassava flour, resistant starch ABSTRAKTepung singkong termodifikasi (Mocaf) merupakan produk turunan dari tepung singkong yang menggunakan prinsip modifikasi sel singkong secara fermentasi selama 12-72 jam. Penelitian ini bertujuan meningkatkan kadar pati resisten tepung singkong melalui fermentasi bakteri asam laktat dan pemanasan bertekanan-pendinginan. Irisan singkong difermentasi dengan kultur campuran bakteri asam laktat (Lactobacillus plantarum B-307:Leuconostoc mesenteroides SU-LS 67 = 1:1) selama 18 jam pada suhu 37oC. Irisan singkong fermentasi selanjutnya di autoklaf (121oC, 15 menit) dan didinginkan (4oC, 24 jam) untuk 1-3 siklus. Irisan singkong kemudian dikeringkan (70oC, 16 jam), digiling dan diayak (80 mesh) untuk mendapatkan tepung singkong termodifikasi. Kombinasi pemanasan bertekanan-pendinginan dengan fermentasi mampu meningkatkan kadar pati resisten pada tepung singkong termodifikasi. Perlakuan fermentasi dengan 2 siklus pemanasan bertekanan-pendinginan (FAC-2S) menghasilkan kadar pati resisten tertinggi (12,51%) dibanding perlakuan lainnya dan meningkatkan kadar pati resisten sebesar 4,5 kali lipat dibandingkan perlakuan kontrol (2,81%). Peningkatan kadar pati resisten menyebabkan terjadinya penurunan daya cerna pada tepung singkong termodifikasi.Kata kunci: bakteri asam laktat, fermentasi, pati resisten, pemanasan bertekanan-pendinginan, tepung singkong termodifikasi
Effect of Mixed Culture Lactic Acid Bacteria Fermentation and Autoclaving-Cooling Cycle on the Level of Resistant Starch Modified Purple Sweet Potato Flour (Ipomea batatas var Ayamurasaki Setiarto, Raden Haryo Bimo; Widhyastuti, Nunuk
Warta Industri Hasil Pertanian Vol 34, No 1 (2017)
Publisher : Balai Besar Industri Agro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.116 KB)

Abstract

This study aimed to analyze the influence of mixed culture of lactic acid bacteria fermentation and autoclaving-cooling cycle for resistant starch content of modified purple sweet potato flour. Purple sweet potato slices had been fermented with mixed cultures of lactic acid bacteria (Lactobacillus plantarum B-307:Leuconostoc mesenteroides SU-LS 67) (1:1) for 24 hours at 370C. Then, fermented purple sweet potato slices had been autoclaved (1210C, 15 min) and cooled (40C, 24 hours), treatment was done for one, two and three cycles. Furthermore, purple sweet potato slices was done dried (800C, 18 hours), ground and sieved (80 mesh) to obtain modified purple sweet potato flour. Combination autoclaving-cooling and fermentation can increase levels of resistant starch of modified purple sweet potato flour. The more number of autoclaving-cooling cycle had been applied can increase significantly the levels of resistant starch. Treatment fermentation with autoclaving-cooling 1 cycles (FAC-1S) produced the highest resistant starch content (11.26%) compared to other treatments and it increased levels of resistant starch by 5.34-fold compared to control (2.11%). Increased levels of resistant starch can contribute for decrease the digestibility of modified purple sweet potato flour.