Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 39, Issue 7, Pages 814-826Publisher
ELSEVIER
DOI: 10.1016/j.lwt.2005.05.006
Keywords
Nham; fermented pork sausage; starter culture; L. curvatus
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The effect of inoculum level of Lactobacillus curvatus on Nham fermentation was studied. Nham inoculated with L. curvatus at 10(4) (LC104) and 10(6) cfu/g (LC106) exhibited a higher rate of fermentation than naturally fermented Nham (control) as indicated by greater rate of pH drop, lactic acid production, and changes in protein compositions. Based on the pH, the fermentation was completed within 72, 48 and 36h for control, LC104, and LC106, respectively. Higher extent of proteolysis and lipolysis were observed during fermentation of Nham inoculated with starter bacteria (P < 0.05). Due to higher acid production rate and extent, texture development of inoculated Nham was more rapid. Inoculated Nham exhibited higher TPA hardness and adhesiveness but lower fracturability than naturally fermented Nham (P < 0.05). In terms of acceptability, control and LC104 had higher ratings on the overall liking than LC106 (P < 0.05). However, LC104 was better accepted than control in terms of flavour, sourness, saltiness, and texture. Unusual smell was detected only in Nham inoculated at 10(6) cfu/g. Based on physico-chemical properties and consumer acceptability, L. curvatus is a potential starter for Nham fermentation. However, inoculation of L. curvatus at high level may cause off-flavour in the product. (c) 2005 Swiss Society of Food Science and Technology. Published by Elsevier Ltd. All rights reserved.
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