Distribution of Polysaccharide Digestive Enzymes in a Marine Gastropod Dolabella auricularia.
نویسندگان
چکیده
منابع مشابه
Digestive Enzymes in Marine Species
The proteolytic activities of the digestive tract of three carnivorous fish species (Sebastes mentella, Scophthalmus maximus, Sparus aurata) have been studied. The activity found in the stomach showed a pH optimum of 2.0 for all species, whereas this was in the alkaline range (9.5-10.0) in the intestinal extracts. Similar optimal temperature was measured for all species, although higher residua...
متن کاملCellulases of a marine mollusc, Dolabella sp.
1. A crude cellulase extract was prepared from the hepatopancreas of a marine mollusc, Dolabella sp., and partially purified by ammonium sulphate fractionation. 2. The optimum pH values of the partially purified preparation were 6.5 and 8.0 for Walseth cellulose and CM-cellulose respectively. It was most stable at pH6.0 and showed moderate thermostability. 3. The partially purified preparation ...
متن کاملCharacteristics of some digestive enzymes in sobaity, Sparidentex hasta
Background: Determination of digestive enzymes activity would provide critical information in the design of appropriate diet. Sobaity, Sparidentex hasta is found in the Persian Gulf and cultured in countries adjacent to it. OBJECTIVES: This study investigated proteolytic, amylase and lipase activities in the intestine of Sparidentex hasta captured from the Persian Gulf. METHODS: 60 immature S...
متن کاملConservation of digestive enzymes.
The traditional understanding is that an entirely new complement of digestive enzymes is secreted by the pancreas into the small intestines with each meal. This is thought to be necessary because, like food itself, these enzymes are degraded during digestion. In this review we discuss experiments that bring this point of view into question. They suggest that digestive enzymes can be absorbed in...
متن کاملEffects of acetylcholine on resting and action potentials, and on contractile force in the ventricle of Dolabella auricularia.
Acetylcholine (2 x io" to 2 x io~ M) depolarized the isolated ventricle of Dolabella auricularia. The depolarization was accompanied by a negatively inotropic effect from 2 x io~* M to 2 x io~* M, and by a positively tonotropic effect from 2 x io~* M to 2 x icr M. The interaction of acetylcholine and 5-hydroxytryptamine was studied by artificially prolonging the plateau of the cardiac action po...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: NIPPON SUISAN GAKKAISHI
سال: 1991
ISSN: 1349-998X,0021-5392
DOI: 10.2331/suisan.57.2077