Results 161 to 170 of about 78,627 (266)

Laboratory Synthesis, Characterization, and Py-GCMS-Based ¹³C Quantification of ¹³C‑Enriched Polyethylene. [PDF]

ACS Omega
Chowreddy RR, Hassani A, Vaaje-Kolstad G, Mylvaganam B.   +3 more
europepmc   +1 more source

Direct visualization of inner-sphere electrocatalytic reactions as they occur at detachable electrochemical interfaces. [PDF]

Chem Sci
Zeng X, Qiu P, Cui X, Zhu C, Zeng C, Chen J, Li P, Chen S, Wei Z.   +8 more
europepmc   +1 more source

Hole‐Activated Lattice Oxygen Enables Pt‐Free Propane Dehydrogenation by Eliminating the Hydrogen Recombination Bottleneck

Angewandte Chemie, EarlyView.
Trace Mg doping into gallia–alumina generates hole‐type oxygen species that accelerate hydrogen recombination, eliminating the need for Pt promotion. The fully oxide‐based catalyst resists sintering under repeated regeneration, outperforming benchmark PtSn and CrOx catalysts with exceptional stability over 30 dehydrogenation–regeneration cycles ...
DongHwan Oh, Jaewoo Jeong, Susung Lee, Younghwan Park, Seunghyuck Chi, Yaejun Baik, Hyungjun Kim, Hyeyoung Shin, Minkee Choi   +8 more
wiley   +1 more source

Stable Isotopes for the Study of Energy Nutrient Metabolic Pathways in Relation to Health and Disease. [PDF]

Metabolites
Azzout-Marniche D, Tomé D.
europepmc   +1 more source

Water‐Derived Radical Species Initiate Six‐Electron Oxidation of Cyclic Ketones in Microdroplets

Angewandte Chemie, EarlyView.
Spontaneous six‐electron oxidation of cyclic ketones to yield dicarboxylic acids/keto acids is achieved in ethanol microdroplets containing about 2% water under ambient conditions without any metal salts, acids, or oxidants. Mechanistic studies show that trace amounts of water and molecular oxygen serve as active oxidants in this transformation ...
Muhammad Mujahid Ali, Manish Jana, William LeFever, Robert Graham Cooks   +3 more
wiley   +1 more source

Establishment of a Purge and Trap Continuous-Flow Isotope Ratio Mass Spectrometer System for Analysis of Stable Nitrate Isotopes (δ¹⁵N and δ¹⁸O) in Water Samples by Ti(III) Reduction. [PDF]

Rapid Commun Mass Spectrom
Gcakasi MN, Stumpp C, Watzinger A.
europepmc   +1 more source

New Water Oxidation Mechanism in Photosystem II Resolves Major Experimental Controversies

Angewandte Chemie, EarlyView.
In Photosystem II Oxygen Evolving Complex, we discovered the O3‐O6 peroxide at lower energy. Assignment of the O3 ligated by histidine (His337) as a slow exchanging substrate and its coupling with O6 give the O─O bond formation mechanism most consistent with all currently available experimental data. Proposal shows how protein environment can steer the
Yulia Pushkar
wiley   +1 more source

Toward diagnostically relevant isotope-ratio biomarkers: what does MC-ICP-MS still need for standardized measurements? [PDF]

Anal Bioanal Chem
Ramirez DA, Meermann B.
europepmc   +1 more source

Isotope dilution mass-spectrometry of potassium

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

Hyperpolarization of Pyridine 15N‐Oxide Molecular Probes Enabled by Parahydrogen

Angewandte Chemie, EarlyView.
Pyridine 15N‐oxides are introduced as motifs for hyperpolarization studies and biochemical applications are demonstrated. ABSTRACT Magnetic resonance (MR) is a powerful non‐invasive technique for probing structural, functional, and metabolic processes with high spatial and temporal resolution.
Ruhuai Mei, Lisa Maria Fries, Gonzalo Gabriel Rodriguez, Charlotte von Petersdorff‐Campen, Leander Konstantin May, Julius Frederik Matz, Sergey Korchak, Grysette Daher, Stefan Glöggler   +8 more
wiley   +1 more source