Deuterium (hydrogen) flux permeating palladium has been analyzed using mass spectroscopy (SRS RGA200) in a new apparatus. The “mass 6” component has been confirmed again. It is found that Langevin rate of D3 + generation in the mass spectrometer plays an important role. However, “mass 6” component cannot be attributed to D3 + only. The palladium plays an important role as well. The mixture of d...

Deuterium to hydrogen ratios of 14 plant species from a salt marsh and lagoon were 55 per thousand depleted in deuterium relative to the environmental water. Carbon tetrachloride-extractable material from these plants was another 92 per thousand depleted in deuterium. This gave a fractionation factor from water to CCl(4) extract of 1.147. This over-all fractionation was remarkably constant for ...

We review and update some aspects of deuterium chemistry in the postrecombination Universe with particular emphasis on the formation and destruction of HD. We examine in detail the available theoretical and experimental data for the leading reactions of deuterium chemistry and we highlight the areas where improvements in the determination of rate coefficients are necessary to reduce the remaini...

A systematic approach has been followed in the production and characterization of Pd foils to be used in excess heat production experiments [1][ 2] . Starting with a metal foil as supplied, palladium samples have been fabricated and characterized in a step by step process, and then subjected to electrolysis deuterium loading. The characterized metallurgical properties include the main grain siz...

The search for deuterium Balmer lines with VLTUVES is reported in H ii regions of the Galaxy and the Magellanic Clouds. The D i lines appear as faint, narrow emission features in the blue wings of the H i Balmer lines and can be distinguished from high-velocity H i emission. The previous identification to deuterium is re-inforced beyond doubt. The detection of Dα and Dβ in Orion (Hébrard et al....

[reaction: see text] The photocyclization of 2-vinylbiphenyl and its derivatives has been proposed to occur via a two-step mechanism: photocyclization to form an unstable 8a,9-dihydro-phenanthrene intermediate, followed by exothermic unimolecular isomerization to a 9,10-dihydrophenanthrene. The mechanism of the hydrogen shift process has been investigated using deuterated derivatives of 2-isopr...

During the course of feeding experiments with nn-phenylalanine, labeled in the ring with deuterium, it was found that the liver and carcass cholesterol of the rats contained deuterium. Further, liver slice studies with ring-labeled phenylalanine showed that the deuterium content of the cholesterol was not proportionately lowered by the presence of large excesses of non-isotopic acetate.’ It has...

The observation of deuterium fractionation in the molecular gas in hot cores is currently interpreted as evaporation of deuterium-rich molecules from the icy grain mantles where they accumulated during the cold, dense cloud core stage. The predicted enrichment in deuterium of the ices has never been observed. This work provides the rst detections of solid HDO in grain mantles. We nd column dens...