Results 181 to 190 of about 276,793 (392)

Basizität im angeregten Zustand verändert die Selektivität der aromatischen Deuterierung: Anwendung auf die Late‐Stage Markierung von Pharmazeutika

Angewandte Chemie, EarlyView.
Wir präsentieren eine metallfreie Methode für die Deuteriummarkierung von Aromaten in deuteriertem HFIP. Dieser Ansatz nutzt die erhöhte Basizität von Aromaten im angeregten Zustand, um den selektiven Wasserstoffisotopenaustausch an schwer zugänglichen Positionen zu ermöglichen.
Eva Rivera‐Chao, Javier Corpas, Giovanni Lonardi, Volker Derdau, Alessandro Ruffoni, Daniele Leonori   +5 more
wiley   +1 more source

SOLVOLYSIS IN DEUTERIUM AND HYDROGEN OXIDE [PDF]

, 1956
P. M. Laughton, R. E. Robertson
openalex   +1 more source

Deuterium concentration depth profiling in sputter-deposited tungsten coated F82H using secondary ion mass spectrometry

Nuclear Materials and Energy, 2019
Deuterium plasma-driven permeation (PDP) through reduced activation ferritic steel alloy F82H with and without sputter-deposited tungsten (SP-W) coatings has been conducted using a laboratory-scale steady-state plasma facility.
Y. Xu, Y. Hirooka, L.M. Luo, Y.C. Wu
doaj  

Runaway electron generation in disruptions mitigated by deuterium and noble gas injection in SPARC [PDF]

arXiv
One of the critical challenges in future high current tokamaks is the avoidance of runaway electrons during disruptions. Here, we investigate disruptions mitigated with combined deuterium and noble gas injection in SPARC. We use multi-objective Bayesian optimization of the densities of the injected material, taking into account limits on the maximum ...
arxiv  

The deuterium-sulfide band at 4,590 cm-1

, 1954
Harry C. Allen, R.E. Naylor, Earle K. Plyler   +2 more
openalex   +1 more source

Meson Production by γ-Rays from Deuterium [PDF]

, 1952
Yosio Saitô, Yôiti Watanabe, Yoshio Yamaguchi   +2 more
openalex   +1 more source

Rapid transient absorption and biliary secretion of enantiomeric cholesterol in hamsters

Journal of Lipid Research, 2006
To probe the pathway and specificity of cholesterol absorption, the synthetic enantiomer of cholesterol (ent-cholesterol) and cholesterol were labeled with deuterium, gavaged into hamsters, and measured by negative ion mass spectrometry.
Emily J. Westover, Xiaobo Lin, Terrence E. Riehl, Lina Ma, William F. Stenson, Douglas F. Covey, Richard E. Ostlund, Jr.   +6 more
doaj  

Can 1957 cold-fusion explain 1989 cold-fusion? [PDF]

arXiv
The possibility that muon-catalyzed nuclear fusion at ambient temperature takes place in deuterated metals is analyzed theoretically. It is suggested that the muon-catalyzed deuterium-deuterium (dd) or deuterium-tritium (dt) fusion rate, experimentally observed in liquid deuterium, increases in a PdD crystal.
arxiv  

Kinetics of the Exchange Reaction between Diborane and Deuterium [PDF]

, 1951
P. Calvin Maybury, W. S. Koski
openalex   +1 more source

Excited‐State Basicity Diverts the Site‐Selectivity of Aromatic Deuteration: Application to the Late‐Stage Labeling of Pharmaceuticals

Angewandte Chemie International Edition, EarlyView.
We present a metal‐free method for aromatic deuterium labeling via photoexcitation in deuterated HFIP. This approach leverages the enhanced basicity of excited‐state aromatics to achieve selective hydrogen isotope exchange at challenging positions. Demonstrated on complex drug molecules, this efficient strategy provides a valuable tool for isotope ...
Eva Rivera‐Chao, Javier Corpas, Giovanni Lonardi, Volker Derdau, Alessandro Ruffoni, Daniele Leonori   +5 more
wiley   +1 more source