Results 241 to 250 of about 386,226 (302)

Photoinduced Selective Construction of Densely Functionalized Spirocyclic Ethers With Carbyne Equivalents

Angewandte Chemie, EarlyView.
A reactivity programmed cascade between carbyne equivalents and allylic benzoates was developed that sequentially orchestrates all three reactivity modes of carbyne equivalents, enabling the rapid installation of three σ‐bonds at a single carbon center and providing efficient, scalable access to structurally diverse spirocyclic ethers. ABSTRACT Carbyne
Jianke Su, Chu Wang, Zhongping Cai, Jiale Wu, Xu Yan Chen, Jie Wu   +5 more
wiley   +1 more source

Fast Ultra‐Selective 1H‐15N 1D NMR Spectroscopy Unlocks Atom‐Resolved Dynamics of Low‐Complexity Protein Regions

Angewandte Chemie, EarlyView.
NMR 15N spin‐relaxation rates are a primary source of information for deciphering protein conformational dynamics, but they require unreasonable experimental times when their 1H‐15N 2D spectra are highly congested. We propose an ultra‐selective method, SNIPER, that greatly accelerates data collection of individual residues. This allows characterization
Wiktor Adamski, Geraldine R. Levy, François‐Xavier Cantrelle, Davy Sinnaeve   +3 more
wiley   +1 more source

Baobab isotope records and rainfall forcing in Southwest Madagascar over the last 700 years. [PDF]

PLoS One
Razanatsoa E, Gillson L, Hall G, Virah-Sawmy M, Woodborne S.   +4 more
europepmc   +1 more source

Tubulin polymerization dynamics are influenced by magnetic isotope effects consistent with the radical pair mechanism. [PDF]

Sci Adv
Zadeh-Haghighi H, Siguenza CR, Smith RP, Simon C, Craddock TJA.   +4 more
europepmc   +1 more source

Secondary Isotope Effect

Journal of Synthetic Organic Chemistry, Japan, 1965
openaire   +2 more sources

Preservation of stable isotope niche dynamics in squamate museum specimens. [PDF]

J Anim Ecol
Grundler MR, Rosenblum EB.
europepmc   +1 more source

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Diffusion Isotope Effects in Isotope Mixtures

Berichte der Bunsengesellschaft für physikalische Chemie, 1972
AbstractThe tracer diffusion of deuterium and tritium in the β‐phase of PdHn has been measured by means of special techniques, the time lag method with mass spectrometer or counter tube as detector, and the decay function of isotope exchange. It has been found that D atoms as tracer in β‐PdHn, i.e.
B. Bonn, E. Gans, G. Sicking, E. Wicke
openaire   +1 more source

Electrochemical Isotope Effect and Lithium Isotope Separation

Journal of the American Chemical Society, 2009
A large electrochemical isotopic effect is observed upon the electrodeposition of lithium from solutions of propylene carbonate producing isotopically light metal deposits. The magnitude of fractionation is controlled by the applied overpotential and is largest close to equilibrium.
Jay R, Black, Grant, Umeda, Bruce, Dunn, William F, McDonough, Abby, Kavner   +4 more
openaire   +2 more sources

Nucleophile Isotope Effects

ChemInform, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Vernon E. Anderson, Adam G. Cassano, Michael E. Harris   +2 more
openaire   +1 more source

Chlorine Isotope Effect

Nature, 1954
DURING the past few years, there has been a growing interest in the differences in reaction-rates which arise from isotopic substitution. Attention has been largely focused on the isotopes of carbon, nitrogen and oxygen1, but recently the effect has been demonstrated for heavier atoms, in particular for the isotopes of sulphur2.
ROSALIE M. BARTHOLOMEW, F. BROWN, M. LOUNSBURY   +2 more
openaire   +1 more source