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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Lipid Peroxidation and Antioxidant Activity in Molting Stages of Mud Crab (Scylla serrata)) ผู้เขียน: ดร.จินตนา สและน้อย, รองศาสตราจารย์ ,  Pakawan Setthamongkol, ภัทราวดี ศรีมีเทียน, ดร.เกรียงไกร สถาพรวานิชย์, ผู้ช่วยศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractLipid peroxidation (LPO) is the process whereby oxygen free radicals steal electrons from polyunsaturated fatty acids of cell membranes, initiating a self-propagating chain reaction and the end-products of the reactions are dangerous to the viability of cells. It is used as an indicator of oxidative stress or the amount of free radicals in cells and tissues. The observation of LPO activities in various organs of mud crab (Scylla serrata) over the molting cycle showed evidence that supported the functions of free radicals. LPO in the intermolt stage was significantly (P < 0.05) lower than at the premolt stage. The LPO activities gradually increased when the crab entered the premolt stage which was detected in the haemolymph, gill, hepatopancreas, integument and muscle of crabs. The hepatopancreas seemed to be the organ where the free radical processes occurred. LPO in the haemolymph, integument and gills had the highest levels 2 d before molting while the activities in the hepatopancreas showed distinguishing functions 2 wk before molting. The determination of antioxidant activity using free radical scavengers showed the same pattern in the gills, meat, hepatopancreas and claws. The activities gradually decreased from the intermolt stage until they reached a minimum in the early postmolt, and then increased again at late postmolt. It clearly indicated that LPO activities in the molting cycle corresponded with the physiology during the stage changing and adaptation of crab. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Growth and Nutrients Analysis in Marine Macroalgae) ผู้เขียน:Pakawan Setthamongkol, ดร.สุริยัน ธัญกิจจานุกิจ, ผู้ช่วยศาสตราจารย์ , ดร.เกรียงไกร สถาพรวานิชย์, ผู้ช่วยศาสตราจารย์, ดร.จินตนา สและน้อย, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractMacroalgae are one of the most important marine, living, renewable resources and are used for human consumption, animal feed and fertilizer in many countries. Nine species of macroalgae belonging to the Chlorophyta and Rhodophyta divisions—Chaetomorpha crassa, Chaetomorpha linum, Ulva rigida, Caulerpa racemosa, Caulerpa brachypus, Caulerpa lentillifera, Caulerpa taxifolia, Gracilaria tenuistipitata and Gracilaria fisheri—were cultured in a closed system with Guillard’s f/2 medium for 3 wk. After rearing, C. lentillifera achieved the highest mean (? SD) growth rate, followed by U. rigida and C. crassa at 7.28 ? 0.69, 2.66 ? 0.83 and 2.64 ? 0.91 g.d-1, respectively. In addition, C. taxifolia had the highest mean (? SD) protein 33.83 ? 0.21% and lipid 3.26 ? 0.44% contents, and the maximum mean (? SD) carbohydrate 67.84 ? 0.04%, fiber 34.29 ? 0.40% and ash 47.80 ? 0.87% contents were found in U. rigida, C. crassa and C. lentillifera, respectively. Knowledge of the essential compositions in the macroalgae could lead to the potential development of novel seaweed products in the future. |
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