Results 161 to 170 of about 81,435 (262)

From Method-Defined Signals to Reference Measurement Procedures: Two Decades of Mass Spectrometry-Based ProGRP Quantification. [PDF]

J Proteome Res
Coradduzza D, Azara E, La Salvia A, Medici S, Carru C, Wood TD, Fanciulli G.   +6 more
europepmc   +1 more source

Heavy‐Atom Tunneling at Room Temperature Revealed by Instanton Theory

Angewandte Chemie, EarlyView.
Usually, tunneling does not play a significant role in chemical reactions except at low temperature, especially when heavy atoms are involved. However, using nonadiabatic instanton theory we find that heavy‐atom tunneling dominates the reaction mechanism for spin‐forbidden processes in the synthesis of strained organic molecules even at room ...
Debaarjun Mukherjee, Kamil D. Petryczkiewicz, Jeremy O. Richardson   +2 more
wiley   +1 more source

Automated Peak Annotation in Time-of-Flight Secondary Ion Mass Spectrometry via a Physics-Informed Probabilistic Framework. [PDF]

Molecules
Chen J, Cao Y, Jiang X, Wu C, Hao Q, Hu Y, Liu J.   +6 more
europepmc   +1 more source

Methane Activation by B5+ Toward a CB5H2+ Isomer Containing a Planar Tetracoordinate Carbon Atom

Angewandte Chemie, EarlyView.
Methane activation by B5+ yields CB5H2+ through H2 elimination. Electronic‐structure calculations connect the nascent dehydrogenation product to a low‐lying isomer containing a planar tetracoordinate carbon atom. ABSTRACT Planar tetracoordinate carbon (ptC) motifs have been identified predominantly in the global‐minimum structures of gas‐phase clusters
Qin‐Wei Zhang, Qiang Chen, Fernando Murillo, Filiberto Ortíz‐Chi, Rui‐Nan Yuan, Fernando Martínez‐Villarino, Aura Gómez‐Heredia, Hong Niu, Rui Wei, Jiao‐Jiao Chen, Yan‐Bo Wu, Gabriel Merino   +11 more
wiley   +1 more source

Lithium Isotopic Analysis of Spodumene by Secondary Ion Mass Spectrometry. [PDF]

Rapid Commun Mass Spectrom
Sharpe R, Fayek M, Luo JC.
europepmc   +1 more source

Isotope dilution mass-spectrometry of potassium

BUNSEKI KAGAKU, 1973
MUROZUMI, Masayo, NAKAMURA, Seiji
openaire   +2 more sources

Controlled Hydrogen Delivery by Single‐Atom Ru Accelerates Electrocatalytic Ammonia Synthesis

Angewandte Chemie, EarlyView.
Single Ru atoms anchored on Co3O4 guide reactants along a hydrogen‐rich surface pathway, enabling efficient and selective conversion of NO to NH3. By linking atomic design to catalytic performance, this strategy clarifies the reaction mechanism and offers a versatile platform for engineering oxide catalysts for electrochemical ammonia synthesis ...
Zheng Liu, Xingchi Li, Zhenggang Xue, Jiayi Liu, Zhenlin Wang, Evangelina Pensa, Donglin Han, Jialing Song, Haiyan Duan, Chaoqi Zhang, Lupeng Han, Ming Xie, Yongjie Shen, Wenqiang Qu, Emiliano Cortes, Dengsong Zhang   +15 more
wiley   +1 more source

Reaffirming the Consistency of the Original Stock of NBS 19 Limestone and Its Byproduct With Finer Grain Size for δ¹³C and δ¹⁸O Calibrations-Both Distributed Internationally. [PDF]

Rapid Commun Mass Spectrom
Qi H, Coplen TB, Reid LT, Mroczkowski SJ.   +3 more
europepmc   +1 more source

Chiral Fjord‐Edged Nanographenes Constructed by Allylic‐Migration‐Mediated Cyclization

Angewandte Chemie, EarlyView.
A novel allylic‐migration‐mediated cyclization strategy enables the construction of two fjord‐edged nanographenes without steric blocking groups. The resulting non‐planar molecules exhibit remarkable chiroptical properties, with an absorption dissymmetry factor surpassing those of pristine [5]helicene and previously reported fjord‐edged nanographenes ...
Zhen‐Lin Qiu, Jiang‐Feng Xing, Boris Borrisov, Qing‐Song Deng, Renxiang Liu, Muhammad Imran, Ji Ma, Xinliang Feng   +7 more
wiley   +1 more source

Chemical Derivatization Strategies for Expanding Small Biomolecule Analysis by MALDI-MS. [PDF]

Metabolites
Hu X, Wang Q, Lin Y, Wan J.
europepmc   +1 more source