Results 81 to 90 of about 27,730 (223)

Electronic Smoking Devices Among University Students: Usage Patterns and Chemical Composition of Inhaled Substances

open access: yesAnalytical 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

A Convenient and Efficient Protocol for the Synthesis of Adipic Acid Catalyzed by ACC/Silica Gel under Ultrasound Irradiation

open access: yesE-Journal of Chemistry, 2012
Adipic acid was synthesized from cyclohexanol oxidized by ACC/silica gel in 89% yield within 3 h at 30°C under ultrasound irradiation.
Zhi-Ping Lin
doaj   +1 more source

2-(Naphthalen-1-ylamino)cyclohexanol

open access: yesActa Crystallographica Section E, 2011
The title compound, C16H19NO, was synthesized under solvent-free conditions by reaction of 7-oxa-bicyclo[4.1.0]heptane and naphthalen-1-amine in the presence of Ca(CF3COO)2 as catalyst. The cyclohexane ring adopts a chair conformation.
Rachid Outouch   +4 more
doaj   +1 more source

A TR ESR Study of the Quenching of Photoexcited Dioxouranium (VI) Salts by Stable Nitroxyl Free Radicals [PDF]

open access: yes, 1993
TR ESR spectroscopy was applied to the study of the quenching of excited dioxouranium (VI) (uranyl) nitrate and sulfate by stable nitroxyl radicals of the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) family.
Khudyakov, I. V., Turro, Nicholas J.
core   +2 more sources

Highly Versatile Hydrogenative Functionalizations of Phthalimides Catalyzed by an Ag‐Alumina Zeolite Nanocomposite: One‐Pot Synthesis of 3‐Substituted Isoindolinones

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 9, 5 May 2026.
Heterogeneous‐catalyzed selective and versatile hydrogenative functionalizations of phthalimides have been developed for the first time. By using a solid nanocomposite formed by [Ag/Al2O3] material in combination with [H‐BETA] zeolite as cocatalyst, a broad range of 3‐functionalized isoindolinones have been accesed in one‐pot from phthalimides, H2 and ...
Carles Lluna‐Galán   +2 more
wiley   +1 more source

H2 oxidation versus organic substrate oxidation in non-heme iron mediated reactions with H2O2 [PDF]

open access: yes, 2015
Herein we show that species generated upon reaction of α-[Fe(CF3SO3)2(BPMCN)] (BPMCN = N,N′-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane) with H2O2 (putatively [FeV(O)(OH)(BPMCN)]) is able to efficiently oxidize H2 to H2O even in the presence of ...
Acuña-Parés, Ferran   +9 more
core   +2 more sources

Flight 1 technical report for experiment 74-37 contained polycrystalline solidification in low-G [PDF]

open access: yes
A .005 M solution of fluorescein in cyclohexanol was directionally solidified in a standard 10 x 10 x 45mm UV silica cuvette, using a bottom thermoelectric chilling device. Progress of the experiment was monitored by time lapse photography. During flight
Kattamis, T. Z., Papaziak, J. M.
core   +1 more source

Liquid-Phase Catalytic Oxidation of Organic Substrates by a Recyclable Polymer-Supported copper(II) Complex [PDF]

open access: yes, 2013
Chloromethylated polystyrene beads cross-linked with 6.5 % divinylbenzene were functionalized with 2-(2′-pyridyl) benzimidazole (PBIMH) and on subsequent treatment with Cu(OAc)2 in methanol gave a polymer-supported diacetatobis(2-pyridylbenzimidazole ...
Gayathri, V., Shilpa, M.L.
core   +1 more source

The Relationship Between Catalyst and Solvent in Hydrogenation via Condensed Phase Heterogeneous Catalysis

open access: yesChemSusChem, Volume 19, Issue 8, 28 April 2026.
Heterogeneous catalysis has historically been developed in the gas phase, however, we have found it pertinent to highlight solvent effects that must be accounted for in liquid environments. Condensed phase catalysis, like that in biomass, petroleum and the conversion of CO2, stands to benefit from the typically overlooked discussion regarding the ...
Jim B. Floyd   +3 more
wiley   +1 more source

Catalytic Hydrogenation of Lignin‐Derived Aromatics With Rhodium Oxide in Water

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 14, 15 April 2026.
The easily available, easy‐to‐handle rhodium(III) oxide, Rh2O3, is shown to be a competent catalyst for arene hydrogenation, including chemoselective reduction of α,β‐unsaturated aryl ketones. Catalytic arene hydrogenation offers a direct pathway to saturated carbocycles. It can also be exploited to upgrade lignin‐derived aromatics.
Zhenyu Chen   +8 more
wiley   +1 more source

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