Characterization and in vitro biological activities of Thai traditional fermented shrimp pastes.
In this work, chemical and biological characteristics of two types of Thai fermented shrimp paste, Kapi Ta Dam and Kapi Ta Deang, at different fermentation periods and their raw materials were investigated. Kapi had low water activity and high proteins with high glutamic acid and lysine. Both Kapis, which had different sources, showed similar characteristics. The number of lactic acid bacteria in the products increased during the early stages of fermentation. Free α-amino acid contents in the products increased with the fermentation time. The water extracts from Kapi products showed strong antioxidative activities against ABTS(+) radical, and ACE inhibitory activity but they did not exhibit antimicrobial activity against Staphylococcus aureus, Bacillus cereus, Escherichia coli and Salmonella Typhimurium. Biological activities in Kapi could be developed by fermentation process, enzymatic hydrolysis of proteins and non-enzymatic browning reactions. Kapi could, thus, serve as a potential source of natural bioactive substances.
Department of Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, 10140 Thailand.
Thanyaporn
T
Kleekayai
Department of Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, 10140 Thailand.
Donlaporn
D
Saetae
Department of Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, 10140 Thailand.
Ongart
O
Wattanachaiyingyong
Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Okinawa, 903-0213 Japan.
Shinjiro
S
Tachibana
Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Okinawa, 903-0213 Japan.
Masaaki
M
Yasuda
Department of Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, 10140 Thailand.
Worapot
W
Suntornsuk
Angiotensin I-converting enzyme inhibitory activity; Antimicrobial activity; Antioxidative activity; Fermented shrimp paste