Results 91 to 100 of about 43,923 (277)
Analytical Science Advances, Volume 7, Issue 1, June 2026.ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Eduard F. Valenzuela +7 more
wiley +1 more source
New simple hydrophobic proline derivatives as highly active and stereoselective catalysts for the direct asymmetric aldol reaction in aqueous medium [PDF]
, 2008 New 4-substituted acyloxyproline derivatives with different hydrophobic properties of the acyl group were easily synthesized and used as catalysts in the direct asymmetric aldol reaction between cyclic ketones (cyclohexanone and cyclopentanone) and ...
GIACALONE, Francesco +4 more
core +2 more sources
Advanced Sustainable Systems, Volume 10, Issue 5, May 2026.A biorefinery approach integrates the valorization of agri‐food waste through low‐temperature pyrolysis. The process concurrently yields functional liquid fractions and versatile biochars, which undergo extensive characterization to evaluate their potential in diverse technological applications. These materials serve as efficient renewable catalysts in
Nicola Schiaroli +7 more
wiley +1 more source
Effect of size and oxidation state of size-controlled rhodium nanoparticles on the aqueous-phase hydrodechlorination of 4-chlorophenol [PDF]
, 2014 Unsupported size-controlled Rh nanoparticles of different size and oxidation state were tested as catalysts models in aqueous phase hydrodechlorination (303-318K, 1atm) using 4-chlorophenol (4-CP) as target compound.
Baeza, J.A. +3 more
core +2 more sources
Cyclohexanone 2,4-dinitrophenylhydrazone
Acta Crystallographica Section E Structure Reports Online, 2003 Crystals of the title compound, C12H14N4O4 were obtained by a condensation reaction between cyclohexanone and 2,4-dinitrophenylhydrazine. Within the dinitrophenyl group, the distances of 1.420 (2) and 1.422 (2) A for the C—C bonds close to the imino group are appreciably longer than the average distance of 1.377 (2) A for the rest of the C—C ...
Shang Shan, Duan-Jun Xu, Wei-Xiao Hu
openaire +1 more source
Substrate Walking for Selective Ene Reduction
ChemCatChem, Volume 18, Issue 9, 14 May 2026.Ene‐reductases (EREDs) efficiently reduce activated C═C bonds. Expanding the current application, they catalyze the selective reduction of highly substituted cyclohexenones. Immobilized, they were scaled to 200 mL, achieving full substrate conversion without enzyme degradation. ABSTRACT Ene‐reductases (EREDs) efficiently reduce activated C═C bonds, but
Hugo Brasselet +8 more
wiley +1 more source
Emerging catalytic processes for the production of adipic acid [PDF]
, 2012 Research efforts to find more sustainable pathways for the synthesis of adipic acid have led to the introduction of new catalytic processes for producing this commodity chemical from alternative resources.
Roman, Yuriy, Van de Vyver, Stijn
core +1 more source
Food Science &Nutrition, Volume 14, Issue 5, May 2026.This study mainly consists of two parts. First, after screening for drug‐like metabolites via LC–MS and GC–MS, a comprehensive evaluation model was established using a principal component analysis‐based weighted scoring method, by which the drug‐likeness ranking of three samples was determined.
Han Chen +6 more
wiley +1 more source
A Highly Efficient Method for Synthesis of Bisarylmethylidenes of Cyclic Ketones in [BMIm]Cl/NaOH System as New and Recyclable Catalyst [PDF]
, 2014 An ionic liquid 1-Butyl-3-methylimidazoliumchloride[BMIm]Cl/sodium hydroxide system, was employed as a catalyst for the fast and one-pot crossed aldol-condensation of various aromatic aldehydes and cyclic ketones, to produce a variety of substituted α,α'-
Javad Eslami +2 more
core +1 more source