ISSN: 0973-7510

E-ISSN: 2581-690X

Mohd Alif Afife Dzulfakar , Noorhisham Tan Kofli and Siti Masrinda Tasirin
1Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.
J Pure Appl Microbiol. 2015;9(Spl. Edn. 2):513-518
© The Author(s). 2015
Received: 14/09/2015 | Accepted: 15/11/2015 | Published: 30/11/2015
Abstract

Bedak sejuk is a traditional fermented rice based cosmetic used by women in Malaysia. To date, the production of both homemade and commercial bedak sejuk depends on natural fermentation without using starter cultures. Here, we monitored the microbial population and evaluate the degradation of rice starch in the initial batch fermentation of bedak sejuk. Bedak sejuk sample was prepared by natural fermentation of local rice grains (5% broken). The microbial population changes and degradation of rice starch were analysed for two weeks. Within two weeks, the total microbial, anaerobic bacteria, yeast and mould count increased while coliforms count decreased. The total microbial, anaerobic bacteria, yeast, mould and coliform counts were 11.44±0.54, 6.14±0.27, 2.78±0.22, 1.31±0.19 and 1.24±0.13 log CFU/mL, respectively. The liquefaction activity of a-amylase was higher on the second day (42.3±0.6 µg/min/g) but after that it declined. Total carbohydrate decreased from 80.8 to 80.1 % while reducing sugar of the rice granules and in fermented supernatant increased from 0.02 to 0.15 % and 0.03 to 0.92 g/L, respectively. While the degree of hydrolysis shows an increase but the increment was low. From the scanning electron microscope pictures, the rice grains still retained their whole figures but the fermented starch lost their surface smoothness. Taken together, our results suggest that the changes of microbial population affected the rice starch during the natural fermentation.

Keywords

Lactic acid bacteria (LAB), Yeast, Natural Fermentation, Rice Starch, Bedak sejuk

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© The Author(s) 2015. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.