The fate of ingested chlorophyll-particularly of the phytol portion of the molecule-was studied. Uniformly (14)C-labeled pheophytin a (the Mg-free derivative of chlorophyll a) was prepared from an extract of tobacco leaves grown in (14)CO(2), and was administered by stomach tube to rats in which the thoracic duct had been cannulated. Only about 2% of the administered radioactivity was absorbed ...

Cone-beam computed tomography (CBCT) is used for external-beam radiation therapy setup and target localization. As with all medical applications of ionizing radiation, radiation exposure should be managed safely and optimized to achieve the necessary image quality using the lowest possible dose. The present study investigates doses from standard kilovoltage kV radiographic and CBCT imaging prot...

The influence of the reaction pathway sacrificial molecule oxidation to generate hydrogen is here investigated for lean and rich methanol mixtures. Pt-TiO2 powders promoted or not with tin sulfide were used as catalysts. With help in situ infrared experiments under conditions, evolution was shown take place by hole-related steps, alkoxy carbon-centered species key radical species. study analyze...

Abstract— A quadrupole antenna has been designed and produced at the L-2M stellarator for experiments on ion cyclotron plasma heating current drive. Using a power meter of incident reflected waves, first measurements radiation resistance have performed in ohmic regime. The measured as function mean density. It is shown that fraction absorbed ensured by coaxial modes 25%. created can also be use...

Contemporary radiation-magnetohydrodynamic simulation of the AGNs predicts presence hot and strong accretion disk wind, which gets unstable far from central region turns into gas clumps. These inner-wind outer clumps may be actually observed as ultrafast outflows (UFOs) clumpy absorbers, respectively. We call this picture "hot inner wind model". Observationally, it is challenging to place const...

The BeppoSAX High Energy Large Area Survey (HELLAS) has surveyed about 85 deg of sky in the 5–10 keV band down to a flux of 4− 5× 10 erg cm s . The source surface density of 16.9±6.4 deg at the survey limit corresponds to a resolved fraction of the 5–10 keV X–ray background (XRB) of the order of 20–30 %. Hardness ratios analysis indicates that the spectra of a substantial fraction of the HELLAS...

Abstract Recently, one of the authors suggested calculating void fraction, an essential element in thermalhydraulics, working with the ‘thermodynamic’ quality instead of the usual ‘flow’ quality. However, the standard heat balance is currently stated as a function of the ‘flow’ quality. Therefore, we should search a new energy balance between the mixture enthalpy, based on ‘thermodynamic’ quali...

Protein hydrolysis to peptides and free amino acids and the apparent absorption of amino acids (AAaa) were evaluated in different segments of carp intestine. The AAaa analysed using Cr2O3 as a marker indicated that 73.2% of the amino acids were absorbed in the first 20% of the intestinal tract and 5.3 and 21.5, respectively, in the following segments (20% of gut length). Except for methionine a...