dc.contributor.author | Thongprajukaew, Karun | |
dc.contributor.author | Kovitvadhi, Uthaiwan | |
dc.contributor.author | Engkagul, Arunee | |
dc.contributor.author | Torrissen, Krisna Rungruangsak | |
dc.date.accessioned | 2010-11-12T13:05:44Z | |
dc.date.available | 2010-11-12T13:05:44Z | |
dc.date.issued | 2010-03 | |
dc.identifier.issn | 0075-5192 | |
dc.identifier.uri | http://hdl.handle.net/11250/108928 | |
dc.description | Journal homepage: http://kasetsartjnatsci.kasetsart.org/ | en_US |
dc.description.abstract | Temperature (20-80°C) and pH (2-12) profiles of amylase and lipase at three stages (10-dayold, 1.5-month-old and 3-month-old) in Siamese fighting fish Betta splendens Regan, 1910) were studied. At least nine amylase activities were observed during development: pH 7 at 40°C, pH 9 at 30°C and 50° C, pH 8 and pH 11 at 50°C in females and pH 8 and pH 11 at 40°C and 60°C in males. At the younger stage (≤ 1.5 month old), activity at pH 7 and 40°C, and at pH 9 and 30°C and 50°C was observed. At the
older stage (≥ 1.5 month old), amylase activity at pH 8 and pH 11 in the temperature range of 40-60°C was found. Lipase had at least five levels of activity: pH 7 at 20°C and 40°C, pH 8 at 20-40°C and 60°C, and at pH 11, where the activity peak disappeared in the maturing stage (3 month old) in both sexes.
Amylase had very low specific activity at the 10-day-old stage, while lipase had a high specific activity, similar to older stages. The most suitable pH to determine amylase and lipase activity in Siamese fighting fish was pH 8, whereas a temperature of 50°C was appropriate for amylase and 40°C was suitable for lipase, regardless of sex and age. This information is a prerequisite for future studies of the in vitro digestibility evaluation of nutrient utilization in Siamese fighting fish. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Bangkok: Kasetsart University | en_US |
dc.subject | siamesisk kampfisk | en_US |
dc.subject | siamese fighting fish | en_US |
dc.subject | livssyklus | en_US |
dc.subject | life cycle | en_US |
dc.title | Temperature and pH Characteristics of Amylase and Lipase at different developmental stages of Siamese fighting fish (Betta splendens Regan, 1910) | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 | en_US |
dc.source.pagenumber | 210 - 219 | en_US |
dc.source.volume | 44 | |
dc.source.journal | Kasetsart Journal: Natural Science | |
dc.source.issue | 2 | |