Results 141 to 150 of about 67,957 (294)

Ion–Molecule Reaction Products as Probes and Precursors for Preparative Mass Spectrometry

Chemistry – A European Journal, EarlyView.
Ion–molecule reactions in the gas phase of mass spectrometers are important for preparative mass spectrometry because they (1) provide knowledge about the intrinsic reactivity of ions, helping to predict and control their reactivity at interfaces, and (2) generate new complex ions that can be mass selected and deposited on surfaces.
Markus Rohdenburg, Sebastian Kawa, Kay‐Antonio Behrend, Harald Knorke, Jonas Warneke   +4 more
wiley   +1 more source

A GC-IRMS method for measuring sulfur isotope ratios of carbonyl sulfide from small air samples. [PDF]

Open Res Eur, 2021
Baartman SL, Krol MC, Röckmann T, Hattori S, Kamezaki K, Yoshida N, Popa ME.   +6 more
europepmc   +1 more source

Planetary biology and microbial ecology. Biochemistry of carbon and early life [PDF]

Experiments made with cyanobacteria, phototrophic bacteria, and methanogenic bacteria are detailed. Significant carbon isotope fractionation data is included.
Margulis, L., Nealson, K. H., Taylor, I.
core   +1 more source

On the Vapor Pressures, Phase Transitions, and Solid‐State Fluorescence of 2‐(2‐Hydroxyphenyl)benzoxazole and 2‐(2‐Hydroxyphenyl)benzothiazole

ChemPhysChem, EarlyView.
Benzazoles 2‐(2‐hydroxyphenyl)benzothiazole and 2‐(2‐hydroxyphenyl)benzoxazole exhibit tunable optoelectronic properties via excited‐state intramolecular proton transfer. Combining thermogravimetry (TG‐DSC), vapor pressure measurements, and fluorescence spectroscopy, how sulfur (S) versus oxygen (O) substitution dictates their stability, sublimation ...
José M. Silva Ferraz, Ana L. R. Silva, Lorenza Romagnoli, Andrea Ciccioli, Vera L. S. Freitas, Maria D. M. C. Ribeiro da Silva, Stefano Vecchio Ciprioti   +6 more
wiley   +1 more source

Mononuclear Molybdenum and Tungsten Phosphine Complexes for Catalytic Ammonia Synthesis: Development of the pentaPod Concept

ChemPhysChem, EarlyView.
The pentaPod (P5) concept unites tridentate and tripodal fragments to form molybdenum and tungsten catalytic Chatt‐type complexes for N2‐to‐NH3 reduction. Two pentaPod ligands, P5Me and P5Pln, are available with either two dimethylphosphine or phospholano (Pln) groups. The complexes enable the investigation of reactivity differences in N2 reduction and,
Anna‐Marlene Vogt, Tobias Adrian Engesser, Jan Krahmer, Felix Tuczek   +3 more
wiley   +1 more source

Investigations Into the Human Metabolism of Trestolone (7α‐Methyl‐19‐Nortestosterone)

Drug Testing and Analysis, EarlyView.
As the known metabolites of 7α‐methyl‐19‐nortestosterone (MENT), M1 and M2, suffer from chromatographic issues under routine doping control conditions, the human metabolism of MENT was reinvestigated. From the numerous new metabolites detected, especially, M5 and M10 were identified as the most promising candidates to be implemented into routine ...
Thomas Piper, Gregor Fusshöller, Mario Thevis   +2 more
wiley   +1 more source

Wetland sulfur isotope signals and dynamic isotope baselines: implications for archaeological research

Frontiers in Environmental Archaeology
Sulfur isotopic composition (δ34S) is used in archaeological research to reconstruct past mobility patterns and diet using environmental baselines. Human and faunal collagen δ34S is generally interpreted as reflecting environmental baselines derived from
Sarah K. Wexler, Rhiannon E. Stevens
doaj   +1 more source

Rational Design and Operando Characterization of Hierarchical α‐FeOOH‐FeP/Ni3S2 Catalysts for High‐Rate Alkaline Water Electrolysis

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A hierarchical FeOOH–FeP@Ni3S2 electrocatalyst is engineered on 3D Ni foam to enable efficient alkaline oxygen evolution. Operando spectroscopic techniques reveal dynamic surface reconstruction and proton‐coupled electron transfer (PCET) kinetics. The catalyst exhibits low overpotential and industrial‐level current operation, driving high‐performance ...
Maria S. Metaxa, Ioannis Vamvasakis, Gerasimos S. Armatas   +2 more
wiley   +1 more source

Metal‐Directed Self‐Assembly in a Beta‐Sheet Miniprotein Scaffold

European Journal of Inorganic Chemistry, EarlyView.
A rationally engineered miniprotein, V14C, which is based on the beta β‐sheet Foldon domain, self‐assembles via a metal‐binding site to form well‐defined oligomers in the presence of Zn2+, Hg2+, and Cd2+. This modular design expands the toolbox for creating custom metalloproteins, enabling studies of metal–protein interactions for biochemical functions
Chandan Muni Reddy, Marcos R. Conde González, Jürgen H. Gross, Franziska Thomas   +3 more
wiley   +1 more source

Sulfur‐Rich μ‐O Diiron Catalyst for Electrochemical Hydrogen Production

European Journal of Inorganic Chemistry, EarlyView.
A diferric μ‐oxido complex supported by a sulfur‐rich scaffold acts as a proton‐reduction electrocatalyst for H2 production via a μ‐hydroxido species. An aminodithiophenolate scaffold with an NS2 donor set supports diiron complex formation. The diferrous precursor activates O2, giving rise to a diferric μ‐oxido species, which acts as a proton‐reduction
Hugo C. Hernández‐Toledo, Víctor E. López‐Guerrero, Alexander Mondragón‐Díaz, Elvis Robles‐Marín, Marcos Flores‐Alamo, José Manuel Guevara‐Vela, Tomás Rocha‐Rinza, Ivan Castillo   +7 more
wiley   +1 more source