The Characteristics of Synbiotic Yoghurt Freeze-Drying Supplemented by Purple Sweet potato (Study on Sucrose Concentration as Cryoprotectant)
- DOI
- 10.2991/icase-18.2018.12How to use a DOI?
- Keywords
- cryoprotectant, synbiotic, freeze drying, yogurt
- Abstract
Synbiotic yogurt with purple sweet potatoes as prebiotics and Lactobacillus plantarum Dad 13 isolated from Dadih as probiotic has potential as a functional food, but it requires at low storage temperatures. Freeze-drying technique requires cryoprotectant as a protective product such as yogurt. The aims of this research were to determine the proper sucrose concentration as cryoprotectant to obtain a high level of total of Lactic Acid Bacteria and good chemical properties. This research was conducted in a completely randomized design with one factor ie sucrose concentration : 0%, 2,5%, 5%, 7,5%, and was carried out in three replicates. The result showed that sucrose concentration significantly affected the levels of reducing sugar, total plate counts (TPC) of Lactic Acid Bacteria (LAB) after freeze-drying, but had no effect on the water content and TPC of LAB before freeze-drying. The best treatment, resulted in sucrose 5% as cryoprotectant, had the following characteristic : water content of 7,51%, reducing sugar of 14,59 %, TPC of LAB level of 1,98x 109 CFU/g, before freeze-drying, and TPC of LAB level of 9,28x 108 CFU/g after freeze-drying.
- Copyright
- © 2018, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Agustina Tari AU - Catur Handayani AU - Sri Hartati PY - 2018/10 DA - 2018/10 TI - The Characteristics of Synbiotic Yoghurt Freeze-Drying Supplemented by Purple Sweet potato (Study on Sucrose Concentration as Cryoprotectant) BT - Proceedings of the International Conference on Applied Science and Engineering (ICASE 2018) PB - Atlantis Press SP - 45 EP - 47 SN - 2352-5401 UR - https://doi.org/10.2991/icase-18.2018.12 DO - 10.2991/icase-18.2018.12 ID - Tari2018/10 ER -