Results 261 to 270 of about 1,512,078 (302)

Direct observation of Notch signalling induced transcription hubs mediating gene-expression responses

Santa-Cruz Mateos C, Roussos C, de Haro Arbona FJ, Falo-Sanjuan J, Bray S.   +4 more
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Direct Observation of Carbamoylnitrenes

Chemistry – A European Journal, 2016
AbstractAs the prototype Curtius rearrangement reaction, carbamoyl azide decomposes into aminoisocyanate and molecular nitrogen. However, the key intermediate carbamoylnitrene was previously undetected, even though the decomposition of carbamoyl azides has been studied frequently since its discovery in the 1890s.
Li, Hongmin, Wan, Huabin, Wu, Zhuang, Li, Dingqing, Bégué, Didier, Wentrup, Curt, Zeng, Xiaoqing   +6 more
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Direct observation of methoxycarbonylnitrene

Chemical Communications, 2017
Methoxycarbonylnitrene CH3OC(O)N, the missing link in the frequently studied Curtius-rearrangement of CH3OC(O)N has been directly observed by using matrix-isolation IR and EPR spectroscopy.
Hongmin Li, Zhuang Wu, Dingqing Li, Huabin Wan, Jian Xu, Manabu Abe, Xiaoqing Zeng   +6 more
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Observation of Magnetoelectric Directional Anisotropy

Physical Review Letters, 2002
We report the first observation of a new optical phenomenon, magnetoelectric directional anisotropy (MEA). MEA is a polarization-independent anisotropy which occurs in crossed electric field E and magnetic field B perpendicular to the wave vector k of the light. It is described by a contribution to the refractive index of the form (delta)n=(gamma)k x E
Rikken, G., Strohm, C., Wyder, P.
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Direct observation of microbubbles in directional solidification of salol

Physical Review Letters, 1990
Dynamic light scattering at the crystal-melt interface of solidifying salol was followed for 14 days. The hydrodynamic radius deduced from intensity correlation data increased continuously from {approx}1 to {approx}100 {mu}m. When the scattering layer was trapped by the advancing crystal front, microscopic observation revealed bubbles as inclusions ...
, Williams, , Srinivasan, , Cummins
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Direct observation of vinyl hydroperoxide

Physical Chemistry Chemical Physics, 2015
A doubly hydrogen-bonded interaction between the Criegee intermediate and a deuterated carboxylic acid facilitates efficient H/D transfer to yield a partially deuterated vinyl hydroperoxide.
Fang, Liu, Yi, Fang, Manoj, Kumar, Ward H, Thompson, Marsha I, Lester   +4 more
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Direct Observation of Electrocatalytic Synergy

Journal of the American Chemical Society, 2007
Here we describe an approach that directly and unambiguously establishes the synergistic effect between surfaces when brought into close proximity (A's regime) through the use of a scanning tunneling microscope. As a model system, we have employed the electrocatalytic oxidation of CO chemisorbed onto a Pt(111) single-crystal electrode upon engaging a ...
Lin, Zhuang, Jing, Jin, Héctor D, Abruña   +2 more
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Direct Experimental Observation of CS₂OH

ChemPhysChem, 2006
AbstractThe first experimental detection of CS2OH is reported. CS2OH was observed for about one microsecond after its formation, as an intact isolated species in the gas phase. It was generated by electron transfer to the CS2OH+ ion, prepared in the source of a multisector mass spectrometer by suitable ion–molecule reactions.
DE PETRIS, GIULIA, Marzio Rosi, TROIANI, Anna   +2 more
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Aligning direct observation and assessment

Medical Education, 2019
When is observation direct observation? Gauthier argues one must understand the competencies addressed by specific assessment tools to capitalize on direct observation in clinical practice.
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Direct Observation

2023
Timothy D. Ludwig, Matthew M. Laske
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