The activities of hexokinase, citrate-cleavage enzyme, ;malic enzyme' and NADP-linked isocitrate dehydrogenase have been measured in the adipose tissue, testes and adrenals of normal rats, hypophysectomized rats and hypophysectomized rats treated with either thyroxine or thyroxine plus luteinizing hormone. Hypophysectomy reduced the activity of all four enzymes in all three tissues. Thyroxine a...

The Pacific oyster, Crassostrea gigas , is widely distributed and substantially important to shellfish cultivation. Oysters with melanin-colored shells soft parts are increasingly popular of high economic value. However, the distribution synthesis melanin in C. remains unclear there have been only few relevant studies on it. In this study, transmission electron microscopy (TEM) was used observe...

Laying afkir has a weakness: the meat is hard. The tenderness of influenced by connective tissue protein; older tissue, more it increases toughness meat. bromelain enzyme an found in pineapples that can hydrolyze protein so soften This study aims to determine egg-laying chicken meat’s physical and organoleptic properties giving concentrations pineapple peel extract (Ananas comosus L. Merr) 0%, ...

Plant materials have been found useful in decontamination of water polluted with phenolic compounds. The detoxification effect is due to peroxidases contained in plant tissue. Enzyme mediated oxidative coupling of phenol is followed by precipitation of the formed polymer and its removal from the aqueous phase. A synthetic wastewater buffered at pH = 7.4 containing 0.9 mM phenol was treated in t...

SUMMARY This review discribes some of the morphological tools which have allowed not only to discribe the chemical nature of neuronal pathways in the central nervous system but also to approach their physiology and their functions: Enzyme histochemistry; this technique shows the entity of an enzyme in nervous tissue. Immunocyto-histochemistry; based on antigen­antibody reaction constitute the ...

  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...

Angiotensin-converting enzyme (EC 3.4.15.1) exhibits distinctive tissue differences in electrophoretic behaviour. Human tissue homogenates and biological fluids were subjected to agar gel and polyacrylamide gel electrophoresis. The gels were cut into slices and enzymatic activity detected by a specific colorimetric reaction. The technique allows localization of the enzyme in the electrophoretog...

The existence of the enzyme prostaglandin E-2-9-ketoreductase which can convert prostaglandin E-2 to prostaglandin F-2 alpha was indicated in experiments with pig and human ovarian tissues in vitro, using radioimmunoassay methods and a superfusion technique. Further studies involving radiotracer techniques demonstrated that the enzyme was localized in the high-speed (105 000 g) supernatant frac...

objective(s): particularly in developing countries, selenium and/or iodine deficiencies are encountered and use of pesticides in agriculture are not well-controlled. fenvalerate is a pyrethroid insectide used in agriculture and has applications against a wide range of pests. this study was designed to evaluate the effects of fenvalerate on hepatic and cerebral xenobiotic metabolizing enzyme act...

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...