Indonesian Food Science and TechnologyJournal
Vol. 6 No. 1 (2022): Vol 6 No 1, December, 2022

Changes in Lactic Acid Bacteria and Quality of Gac Yoghurt Supplemented with Carbohydrate Sources during Chilled Storage

Nirawan Kulsut (Chiang Mai Rajabhat University, Mae Rim Campus, Chiang Mai, 50330, Thailand)
Palita Kapo (Chiang Mai Rajabhat University, Mae Rim Campus, Chiang Mai)
Supot Boonreang (Chiang Mai Rajabhat University, Mae Rim Campus, Chiang Mai)
Naksit Panyoyai (Department of Agro Industry Chiang Mai Rajabhat University Mae Rim Campus Chiang Mai 50330)



Article Info

Publish Date
30 Dec 2022

Abstract

Gac yoghurt is formulated by mixing gac juice with cow milk and probiotics to form a thick yellow fluid. The research objective was to study the effect of carbohydrate sources (inulin, honey, sucrose, fruit syrup, and sucrose) on lactic acid bacteria remaining after the chilled storage for 28 days. The gac yoghurt was analyzed with physicochemical and sensory characteristics. The experimental design was a Complete Randomized Design (CRD) with eight parameters (total soluble solids, pH, lactic acid content, syneresis, texture, colour, lactic acid bacteria survival, and sensory evaluation). The results showed that in the presence of honey, gac yoghurt had a higher lactic acid count than other treatments throughout 28 days of storage. The lactic acid growth was observed in the first two weeks, then it was almost constant in the third week and levelled off at the end of storage. The addition of carbohydrates resulted in a lower pH than a control. It increased total soluble solids, titratable acidity, and syneresis effect. Gac yoghurt with inulin enrichment kept for 28 days showed a firmer texture and lighter than the rest. However, sensory results showed that gac yoghurt with sucrose was the most preferred formulae based on the average Hedonic scores followed by the yoghurt fermented with honey, inulin, and fruit syrup, respectively.

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Journal Info

Abbrev

ifstj

Publisher

Subject

Agriculture, Biological Sciences & Forestry

Description

The journal aims and scope contains original research results and scientific review includes research in the field of Food Science and Technology sciences clumps like food chemistry, food processing, microbiology food safety and food engineeringas well as nutrition. In addition, it also covers ...