Results 131 to 140 of about 276,793 (392)

The N2D+/N2H+ ratio as an evolutionary tracer of Class 0 protostars

, 2008
Deuterated ions are abundant in cold (T=10 K), dense (n=10^5 cm^-3) regions, in which CO is frozen out onto dust grains. In such environments, the deuterium fractionation of such ions can exceed the elemental abundance ratio of D/H by a factor of 10^4 ...
Adams, Aikawa, Aikawa, Alves, André, André, Bacmann, Bergin, Bergin, Bernes, Bisschop, Boogert, Caselli, Caselli, Caselli, Caselli, Ceccarelli, Ceccarelli, Cernis, Crapsi, Crapsi, Dalgarno, Daniel, Enoch, Evans, Flower, Flower, Fontani, Fontani, Fred, Frerking, Froebrich, Froebrich, Fuller, Gerlich, Gueth, Hatchell, Hatchell, Herbig, J. Stutzki, Jørgensen, Kirk, Kramer, Kramer, Kwon, Lacy, Lada, Looney, Looney, M. C. Wiedner, M. Emprechtinger, Mardones, Mardones, Maret, Matthews, Millar, Myers, Myers, N. H. Volgenau, O'Linger, Oliveira, P. Caselli, Pagani, Parise, Pineda, Rawlings, Redman, Roberts, Roberts, Roberts, Saraceno, Schnee, Shu, Smith, Tafalla, Tafalla, Tafalla, Terebey, van der Tak, Velusamy, Visser, Volgenau, Ward-Thompson, Willacy, Wilson, Womack, Öberg   +86 more
core   +2 more sources

Effects of helium irradiation damage on deuterium plasma-driven permeation through tungsten coated RAFM steel

Nuclear Fusion
In future fusion reactors, the first wall will be irradiated with hydrogen fuel (deuterium (D), tritium (T)) and helium (He) with low energies. In this work, the effects of He plasma irradiation on D permeation through tungsten (W) coated reduced ...
Yue Xu, Xiao-Ping Tian, Hong-Yan Tan, Hai-Ying Fu, Jun-Jie Ni, Lai-Ma Luo, Yu-Cheng Wu   +6 more
doaj   +1 more source

Deuterium medicinal chemistry comes of age.

Future Medicinal Chemistry, 2016
Deuterium is gaining increased appreciation and utilization as a component of active pharmaceutical ingredients. Deuteriummodified or -deuterated compounds retain the potency and selectivity of their hydrogen analogs.
R. Tung
semanticscholar   +1 more source

Palladium‐Catalyzed Dual Csp2─Csp3 Bond Formation: A Versatile Platform for the Synthesis of Benzo‐Fused Heterocycles

Advanced Science, EarlyView.
Pd(II)/Cu(I) co‐catalyzed dual Csp2─Csp3 bonds construction from unactivated alkenes and arylsulfonyl chlorides to access benzo‐fused heterocycles with high efficiency and chemoselectivity. Abstract Transition‐metal‐catalyzed transformations offer a powerful approach to rapidly synthesize complex benzo‐fused heterocycles, crucial for drug and material ...
Jiahui Huang, Yuantao You, Yijian Ma, Xingying He, Yixiao Li, Arunachalam Kesavan, Chengzhi Jin, Chengshuo Shen, Min Zhang, Kedong Yuan   +9 more
wiley   +1 more source

Dynamic Holocene Vegetation and North Pacific Hydroclimate Recorded in a Mountain Peatland, Moloka‘i, Hawai‘i

Frontiers in Earth Science, 2019
The Hawaiian Islands are the only high land in a vast stretch of the North Pacific where past climatological and ecological processes can be reconstructed from terrestrial Earth system archives.
David W. Beilman, Charly Massa, Jonathan E. Nichols, Oliver Elison Timm, Russel Kallstrom, Stephanie Dunbar-Co   +5 more
doaj   +1 more source

Advanced Deuterium Fusion Rocket Propulsion For Manned Deep Space Missions [PDF]

arXiv, 2009
Excluding speculations about future breakthrough discoveries in physics, it is shown that with what is at present known, and also what is technically feasible, manned space flight to the limits of the solar system and beyond deep into the Oort cloud is quite well possible. Using deuterium as the rocket fuel of choice, abundantly available on the comets
arxiv  

Influence of Deuterium-Depleted Water on Hepatorenal Toxicity

, 2018
: The objective of the current study was to evaluate the influence of deuterium-depleted water (DDW) consumption on healthy animals and animals with hepatorenal toxicity.
Dzhimak Stepan Sergeevich, Basov Alexandr Alexandrovich, Elkina Anna Anatolyevna, Fedulova Liliya Viacheslavovna, Kotenkova Elena Alexandrovna, Vasilevskaya Ekaterina Romanovna, Lyasota Oxana Mikhailovna, Baryshev Mikhail Gennadievich   +7 more
semanticscholar   +1 more source

Stable Pincer Gold(III)‐TADF Emitters with Extended Donor–Acceptor Separation for Efficient Vacuum‐Deposited OLEDs with Operational Lifetime (LT95) up to 3831 h at 1000 cd m−2

Advanced Science, EarlyView.
Novel pincer gold(III)‐TADF (thermally activated delayed fluorescence) emitters with extended π‐distances exhibit small singlet‐triplet energy gaps (ΔEST), efficient reverse intersystem crossing (RISC), enhanced radiative decay rates and improved excitons utilization, leading to efficient electroluminescence.
Hui‐Xing Shu, Shuo Xu, Wai‐Pong To, Gang Cheng, Chi‐Ming Che   +4 more
wiley   +1 more source

Deuterium distribution in two major products obtained during the cyclic dimerisation of methyloxirane over acidic molecular sieves [PDF]

, 2006
The ring-transformation reactions of methyloxirane on DZSM-5 and DAlMCM-41 aluminosilicates were studied in a pulse microreactor at 363 K. Cyclic dimerisation was found to be the major reaction pathway. Deuterium distribution in two important products of
Fási, András, Pálinkó, István
core  

The biological effects of deuterium present in food

Discover Food
We have evaluated the biological importance of deuterium in foods based on literature data. Deuterium is a stable isotope of hydrogen that occurs naturally in our environment and is specifically enriched in certain foods.
Zoltán Répás, Zoltán Győri, Orsolya Buzás-Bereczki, László G. Boros   +3 more
doaj   +1 more source