The immune system of cephalopods remains poorly understood. The aim of this study was to determine the specific activity of immune enzymes in epithelial barriers, circulatory and digestive systems of the common cuttlefish Sepia officinalis. Three enzyme groups with putative functions in immunity were investigated: phenoloxidases (POs), lysozymes and protease inhibitors (PIs). Consistent with a ...

Mannitol oxidase and polyol dehydrogenases are enzymes that convert polyalcohols into sugars. Mannitol oxidase was previously investigated in terrestrial snails and slugs, being also present in a few aquatic gastropods. However, the overall distribution of this enzyme in the Gastropoda was not known. Polyol dehydrogenases are also poorly studied in gastropods and other mollusks. In this study, ...

A cytochemical method allowing the localization and quantification of plasma membrane Ca2+-ATPase (PMCA) in frozen sections obtained from digestive gland cells of Mytilus galloprovincialis, Tapes tapes and Chamelea gallina, is presented. The method utilizes lead as a trapping agent of PO4(2-) ions released by Ca2+-ATPase activity. The amount of lead sulphide precipitate proportionally related t...

This research aimed to evaluate the effect of use microwaved flaxseed flour as broiler feed on growth performance and digestive enzyme activity. The material used was 200 a-day-old chicks strain Lohmann MB Platinum. method this in vivo feeding trial using a Completely Randomized Design (CRD) with 5 treatments 4 replications. included levels 0% (T0), 2.5% (T1), 5% (T2), 7.5% (T3), 10% (T4). vari...

The inhibitory potential of purified α amylase inhibitors of sorghum on the digestive enzyme of Tribolium Castaneum, a devastating insect pest of economic importance have been studied. Qualitative and quantitative differences in α amylase of Tribolium Castaneum upon feeding on natural and artificial diets were evident. Natural diets were legumes like Black gram, Pigeon Pea, Red lentil, Cowpea a...

Food characteristics strongly regulate digestive enzymatic activity of insects through direct influences on their midgut mechanisms. Insect performance is better on diets that contain nutrients in proportions that fit its digestive enzymes. Little is known about the influences of rearing history on parasitism success of Habrobracon hebetor Say. This research focused on the effect of nutrient re...

the present study was conducted to evaluate the effect of dietary inclusion of silver nanoparticle on general performance and digestive proteases in zebra fish. four experimental diets were designed with a concentration of 5, 20 and 40 parts per billion (ppb) nanoparticles in the diet (named s5, s20, and s40, respectively) and control group without any nanoparticles (s0). there was no significa...

We examined changes in the histology, physiology and enzymatic activity of the digestive gland — as well as changes in morphology and feeding behavior — of Octopus maya during rearing, to define the phases characterizing post-hatching development. Morphometric changes showed that juvenile O. maya exhibited a non-growth phase during the first 10 d post-hatching (DPH). Histological analysis revea...