A semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) assay was developed to estimate tissue-specific expression of two amylase genes in five different tissues of the Pacific oyster Crassostrea gigas and the experimental effects of food level on the cellular, enzymatic and gene expression changes of the digestive gland. Results indicated that both genes were transcribed a...

Tumours of the digestive system include a number malignant tumours such as oesophageal, gastric and colorectal cancers, which have highest incidence mortality rates in world. Their occurrence is related to variety factors, diet, environment genetics. As key enzyme process folate metabolism, MTHFR gene polymorphism plays an important role pathogenesis development gastrointestinal tumours. This p...

Cockles Cerastoderma edule were fed two different concentrations of two diets with different qualities which were achieved by mixing different proportions of ashed silt particles with cells of the microalgae Tetraselmis suecica. After 3 days (acute response) and 11 days (acclimated response) of exposure to the diets, we analysed the digestive activity of the digestive gland using cyto-histologi...

This study aims to determine students' learning difficulties in the matter of digestive system humans from aspect indicators and factors that cause studying material Digestive System Humans class XI IPA SMA Negeri 2 Bilah Huluh. In this approach type research used is use a qualitative descriptive approach. The population sample were taken by means total sampling 89 students. Data collection tec...

proteases play a key role in protein digestion in ticks and other haematophagous insects. our understanding of blood meal digestion in digestive system of ticks can be very useful for better understanding of basic rules for control of ticks. cells of the midgut endocytose blood components. blood proteins uptake by midgut cells, suggesting the presence of proteases in the midgut cells. in this s...

Résumé Le Moullac G., A. Van Wormhoudt, AQUACOP. Aquat. Living Resour., 1994, 7 , 203-210. Activity of digestive enzymes (trypsin, chymotrypsin and amylase) was studied in relation with food in Penaeus vannamei larvae first stages. Microparticles containing casein involved the decrease of soluble protein content and enzyme activities. Specific trypsin activity but not chymotrypsin was correlate...

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 ...