 |
|
|
ผลงานตีพิมพ์ในวารสารวิชาการDigestive enzymes and in-vitro digestibility of different species of phytoplankton for culture of the freshwater pearl mussel, Hyriopsis (Hyriopsis) bialatusผู้แต่ง: Supannapong, P, Pimsalee, T, A-Komol, T,  Dr.Arunee Engkagul, Assistant Professor , Dr.Uthaiwan Kovitvadhi, Associate Professor , Kovitvadhi, S, Rungruangsak-Torrissen, K, วารสาร:  
|
ผลงานตีพิมพ์ในวารสารวิชาการDevelopment of digestive enzymes and in vitro digestibility of different species of phytoplankton for culture of early juveniles of the freshwater pearl mussel, Hyriopsis (Hyriopsis) bialatus Simpson, 1900ผู้แต่ง:Areekijseree, M, Dr.Arunee Engkagul, Assistant Professor, Kovitvadhi, S, Dr.Uthaiwan Kovitvadhi, Associate Professor, Mrs.Amara Thongpan, Associate Professor, Rungruangsak-Torrissen, K, วารสาร: |
|
|
|
|
 |
|
 |
|
|
|
|
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Characterization and Activity of Digestive Enzymes in Different Sizes of Nile Tilapia (Oreochromis niloticus L.)) ผู้เขียน:รุ่งกานต์ กล้าหาญ, ดร.นนทวิทย์ อารีย์ชน, รองศาสตราจารย์ , ดร.เรืองวิชญ์ ยุ้นพันธ์, ผู้ช่วยศาสตราจารย์ , ดร.อรุณี อิงคากุล, ผู้ช่วยศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe activity of protease, amylase and lipase from the pseudostomach, upper intestine, lower intestine and liver of 5.7, 35.8 and 92.1 g male Nile tilapia (Oreochromis niloticus L.) was determined. Protease activity had an optimal pH of 12, 9 and 9 for the 5.7, 35.8 and 92.1 g fish respectively and the highest specific activity was found in the 35.8 g fish. Amylase activity had an optimal pH of 6, 7 and 2, respectively and the highest specific activity was found in the 92.1 g fish. Lipase activity had an optimal pH of 8, 7 and 8, respectively and the highest specific activity was found in the 35.8 g fish. In all sizes of tilapia, amylase activity was significantly higher in the liver than other organs (P<0.01). Protease and lipase activity in the lower and upper intestine respectively of the 5.7 and 35.8 g fish were significantly higher than in other organs (P<0.01). This study indicated that different sizes of fish had different levels of enzymatic activities. Middle-sized fish appeared to have the highest specific activity of protease and lipase, while the large fish had the highest specific activity of amylase. These results will be used as a basis for suitable feed formulation for different sizes of Nile tilapia so that optimum nutritional values and cost-effectiveness can be achieved. |
|
 |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Temperature and pH Characteristics of Amylase and Lipase at Different Developmental Stages of Siamese Fighting Fish (Betta splendens Regan, 1910)) ผู้เขียน:Karun Thongprajukaew, ดร.อุทัยวรรณ โกวิทวที, รองศาสตราจารย์, ดร.อรุณี อิงคากุล, ผู้ช่วยศาสตราจารย์, Krisna Rungruangsak-Torrissen สื่อสิ่งพิมพ์:pdf AbstractTemperature (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. |