نتایج جستجو برای: deuterium
تعداد نتایج: 8846 فیلتر نتایج به سال:
We have investigated the reliability of gate oxide with deuterium incorporated at the Si/SiO interface through low energy ion implantation into the silicon substrate before thin gate oxide growth. Deuterium implantation at a dose of1 10 /cm at 25 keV showed improved breakdown characteristics. Charge-to-breakdown seems to correlate well with the interface state density measured by conductance me...
Investigation of the metabolism and fate of steroid hormones has been greatly facilitated by isotope stably incorporated into the substance t,o be studied. For many purposes the isotopes of hydrogen are decidedly advantageous in that the chemical synthesis of the labeled steroid can be easily and quickly achieved with a minimum of manipulation. Moreover, since the endogenous pool of the hormone...
Laser driven particle acceleration and measurements ofion energy loss in plasma largely rely on suitable targets toachieve good particle beam and plasma quality. Recent re-search results [2] indicate that cryogenic targets allow forvery high ion energies. Advantages of our cryogenic tar-gets include high purity at solid density in a self-supportedstructure as well as fit...
OBJECTIVE To determine whether deuterium enrichment on carbons 5 and 3 (C5/C3) in plasma glucose is influenced by processes other than gluconeogenesis and, if so, whether these processes are altered by type 2 diabetes. RESEARCH DESIGN AND METHODS In this study, 10 obese diabetic and 10 obese nondiabetic subjects were infused intravenously with [3,5-(2)H(2)] galactose enriched at a C5-to-C3 ra...
The naturally occurring isotope of hydrogen ((1)H), deuterium ((2)H), could have an important biological role. Deuterium depleted water delays tumor progression in mice, dogs, cats and humans. Hydratase enzymes of the tricarboxylic acid (TCA) cycle control cell growth and deplete deuterium from redox cofactors, fatty acids and DNA, which undergo hydride ion and hydrogen atom transfer reactions....
The pressure–composition (PC) behavior of deuterium in single crystal Pd has been measured over a temperature range extending from room temperature to 393 K. These data allow the determination of (i) relative partial molar enthalpy and entropy, without the contribution of the configuration entropy, for the dilute solid solution phase, (ii) enthalpy and entropy change characterizing the a→a9 pha...
This study examined the effect of 25% deuterium oxide in drinking water on systolic blood pressure, uptakes of calcium, and rubidium 86 by aortas of Dahl salt-sensitive rats on 0.4% (low) and 8% (high) sodium chloride (salt) diet. Twenty-four rats were divided into four groups. Groups I and II were on the low salt diet and groups III and IV on the high salt diet from 6 weeks of age. Additionall...
Abstract Improvement of the performance on a hydrogen/deuterium negative ion source for nuclear fusion device is reported. In particular, suppression co-extracted electron current, I e , an important issue to ensure stable beam acceleration. has been confirmed by optimizing magnetic field deflection magnet in extraction grid. Two other new methods reduction were validated. The first was fence w...
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