עמוד 1 מ 40 תוצאות
Under in vitro anaerobic and aerobic incubations the presence of 5-hydroxytryptamine (5-HT) resulted in an accelerated rate of carbon transfer through the carbohydrate metabolic pathways of Hymenolepis diminuta resulting in an increase in worm tissue total carbon pools. Under aerobic incubation,
The carbohydrate constituents of whole eggs and fractions derived from the eggs of Hymenolepis diminuta were partly characterized. Whole eggs contained 9.6 ng of carbohydrate (phenol-sulphuric acid-positive material) per egg, and 3.6 ng of glucose. Analysis of hydrolysed eggs by HPLC demonstrated
When incubated in vitro for 24 h, oncospheres of Hymenolepis diminuta absorb and metabolize radioactive glucose. Between 0 and 12 h post-activation, oncospheres absorb glucose, but glucose is neither metabolized into other carbohydrates nor incorporated into the ethanol-precipitable fraction (which
The elasticities for the different steps of carbohydrate catabolism in the tapeworm Hymenolepis diminuta were estimated from perturbation experiments. These data were then used to calculate flux and metabolite control coefficients. Enzyme elasticities were also calculated from the rate equations and
The metamorphosis of oncospheres of the rat tapeworm, Hymenolepis diminuta, to mature metacestodes induces several pathophysiological effects in the intermediate host, Tenebrio molitor (Coleoptera). Previous investigations have failed to elucidate the mechanism responsible for changes in the host
Diets of rats infected with Hymenolepis diminuta (CESTODA: Cyclophyllidea) were altered with respect to carbohydrate content and to roughage, and the effects on worm growth and development were studied. Compared to worms from rats fed a 56% glucose diet, those on a 56% starch diet were heavier at 10
The vitellocytes of Hymenolepis microstoma contain protein globules as building material for the shell of egg cocoons. Complex carbohydrates were detected as an additive component, dispersed in the matrix of the shell globules. Similar glycans were found at newly formed shells, suggesting that these
The application of metabolic control theory to carbohydrate breakdown in the tapeworm Hymenolepis diminuta shows that it is not necessary for both phosphoenolpyruvate carboxykinase and pyruvate kinase to be modulated in order to control the relative fluxes through the two arms of the
When incubated in vitro for 24 h, intact eggs, chemically shelled eggs (obtained by treating intact eggs with NaOCl), activated larvae (eggs in which the outer shell and inner envelope were removed), and oncospheres (activated larvae treated with papain to remove the embryophore) absorb and
The egg shell of Hymenolepis diminuta is composed of 31.7% protein and 2.9% carbohydrate (by weight), as determined using the Lowry and phenol-sulfuric acid assays and bovine serum albumin and glucose, respectively, as standards. Amino acid analyses of egg shells demonstrated the presence of 16