Results 171 to 180 of about 124,782 (320)

Characterization and Variability Analysis of Volatile Metabolites From Acer saccharum Leaves From Québec Region

open access: yesChemistry &Biodiversity, EarlyView.
ABSTRACT Volatile secondary metabolites in plants can serve as valuable biomarkers for the plant's health, stress response, and pest or disease detection. We have investigated the volatilome of Acer saccharum (sugar maple) leaves using two complementary extraction techniques: headspace‐solid phase micro‐extraction coupled with gas chromatography‐mass ...
Jean‐Christophe Séguin   +2 more
wiley   +1 more source

Oxidation of Toluene to Benzoic Acid Catalyzed by Modified Vanadium Oxide

open access: yesIraqi Journal of Chemical and Petroleum Engineering, 2014
A variety of oxides were examined as additives to a V2O5/Al2O3 catalyst in order to enhance the catalytic performance for the vapor phase oxidation of toluene to benzoic acid.
Wadood T. Mohammed
doaj  

Biosynthesis of Ephedrine Initiated by Pyridoxal Phosphate‐Dependent Formation of Cathinone

open access: yesChemBioChem, EarlyView.
An alternative pathway to ephedra alkaloids via (S)–cathinone is investigated in plants. This pathway circumvents the formation of 1‐phenylpropane‐1,2‐dione as an intermediate, which has been part of the predominantly postulated biosynthetic pathway for the last decades. This alternative pathway involves an enzymatic pyridoxal phosphate (PLP)‐dependent
Karina Witte   +4 more
wiley   +1 more source

Substrate Adaptability Enabled by Remote Noncovalent Interactions: How Far Are We?

open access: yesChemCatChem, EarlyView.
Harnessing attractive noncovalent interactions (NCIs) between substrates and catalysts has emerged as an effective strategy in homogeneous catalysis. The long‐range nature and conformational flexibility of NCIs enable catalysts to adapt to structural changes in substrates, while maintaining remote control over selectivity.
Yuhao Zhu, Ye Zhu
wiley   +1 more source

Rivalling Self‐Oxidation and Aldehyde Deformylation by a Dinuclear Copper(II)‐Superoxide Complex

open access: yesChemCatChem, EarlyView.
A dinuclear Cu2L2‐O2•− reactive intermediate stabilized by a tetradentate N3O ligand set is postulated to be at the origin of aldehyde deformylation via a Baeyer‐Villiger oxidation mechanism, while enabling a radical self‐oxidation cascade in the absence of the substrate.
Andrea Squarcina   +4 more
wiley   +1 more source

Advances in Ligand‐Driven Pd‐Catalyzed C─H Functionalizations: Recent Insights and Updates

open access: yesChemCatChem, EarlyView.
The most significant advances in ligand‐driven Pd‐catalyzed organic synthesis over the past two years are presented. Processes involving C─H activation of substrates, avoiding their prefunctionalization are illustrated. Both the activity and selectivity of the catalyst depend on the design of the ligands (pyridones, pyridines, amino acids, phosphines ...
Jesús Moradell   +3 more
wiley   +1 more source

Investigations into the characterization, degradation, and applications of biodegradable polymers by mass spectrometry

open access: yesMass Spectrometry Reviews, EarlyView., 2023
Abstract Biodegradable polymers have been getting more and more attention because of their contribution to the plastic pollution environmental issues and to move towards a circular economy. Nevertheless, biodegradable materials still exhibit various disadvantages restraining a widespread use in the market.
Paola Rizzarelli   +2 more
wiley   +1 more source

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