Density labeling with deuterium oxide, gel electrophoresis, and isopycnic equilibrium sedimentation were used to study the appearance and disappearance of individual peroxidases in the embryos of germinating barley. No detectable label was incorporated into those peroxidases which are present in the embryo of the dry seed and disappear during germination. Deuterium was incorporated into the add...

Measurements using the Far Ultraviolet Spectroscopic Explorer (FUSE) show that the gas-phase D/H ratio in the solar neighborhood is highly variable and suggest that the elemental abundance of deuterium in the Galactic disk may be higher than previously thought. We investigate in this Letter the possible consequences of such an enhanced D/H ratio on the deuterium fractionation in singly and mult...

To investigate possible anomalies in nuclear reactions in solids, deuterium ion irradiation of deuterated Au/Pd samples have been performed with extensive measurements of reaction products and in situ characterization of the samples including ERDA and RBS. The D(d,p)t reaction rate has been observed to become three orders of magnitude greater than the calculated one. The deuterium density distr...

Diagnosing plasma magnetization in inertial confinement fusion implosions is important for understanding how magnetic fields affect implosion dynamics and to assess conditions magnetized experiments. Secondary deuterium–tritium (DT) reactions provide two diagnostic signatures infer neutron-averaged magnetization. Magnetically confining tritons from deuterium–deuterium (DD) the hot spot increase...

Pulsed Fourier transform proton magnetic resonance spectroscopy was used to study the glutamatealanine transaminase-catalyzed incorporation of deuterium from solvent deuterium oxide into the cy and p positions of L-alanine. It was found that the /3 proton resonance signal initially disappears slightly faster than the signal due to the LY proton, but whereas the o( proton signal decays exponenti...

EBAL PROCEDURES are available for determination of deuterium in water by mass spectrometry. In the method of Solomon (1), water and deuterium oxide are reduced with hot zinc, and lative concentrations of deuterium and hydrogen are measured. ber of investigators have utilized this procedure in precise and ive studies (2-5). Other indirect methods were mentioned by burn et at. (6) in a study in w...

The structure of melittin in the presence of dioleoylphosphatidylcholine (DOPC) was investigated using hydrogen deuterium (H/D) exchange in conjunction with collision induced dissociation (CID) in an rf-only hexapole ion guide with electrospray ionization-Fourier transform ion cyclotron resonance mass spectrometry (ESI-FT-ICR MS). The deuterium incorporation into backbone amide hydrogens of mel...

This paper describes a method of determining protein synthesis and turnover using in vivo labeling of protein with deuterated water and analysis of matrix-assisted laser desorption time-of-flight mass spectrometer (MALDI-TOF) spectrum. Protein synthesis is calculated using mass isotopomer distribution analysis instead of precursor to product amino acid enrichment ratio. During protein synthesis...

We report measurements of the deuterium content of molecular hydrogen (H2) obtained from a suite of air samples that were collected during a stratospheric balloon flight between 12 and 33 km at 40 N in October 2002. Strong deuterium enrichments of up to 400‰ versus Vienna Standard Mean Ocean Water (VSMOW) are observed, while the H2 mixing ratio remains virtually constant. Thus, as hydrogen is p...

ion is followed by addition of a deuterium atom to the alkyl radical These stepsare shownschematically inFigure5. Because the flux of deuterium atoms is essentially constant, the overall reaction is assumed to be first order in the concentration of C-H bonds. Also, because reaction 2 is the addition of two radicals, it is assumed to occur rapidly; thus, reaction 1 is the rate-limiting step. Wit...