Results 21 to 30 of about 5,456,471 (384)
Applied Sciences, 2022 An intercomparison study was conducted to evaluate the contributions of carboxylic acids to m/z 44 (COO+) signals obtained by an on-line aerosol mass spectrometer (AMS) during a field campaign at Cape Hedo, Okinawa, in the western North Pacific Rim.
Bhagawati Kunwar +4 more
doaj +1 more source
Iron-Catalyzed, Highly Regioselective Synthesis of alpha-Aryl Carboxylic Acids from Styrene Derivatives and CO2 [PDF]
, 2012 The iron-catalyzed hydrocarboxylation of aryl alkenes has been developed using a highly active bench-stable iron(II) precatalyst to give alpha-aryl carboxylic acids in excellent yields and with near-perfect regioselectivity. Using just 1 mol % FeCl2, bis(
Greenhalgh, Mark D., Thomas, Stephen P.
core +1 more source
Corrosion protection of AA2024 sealed anodic layers using the hydrophobic properties of carboxylic acids [PDF]
, 2009 The present study investigates the use of carboxylic acids as a post-treatment for sealed AA2024 anodised in tartaric–sulphuric acid electrolyte. Four monocarboxylic acids with different carbon chain lengths were tested ((CH3–(CH2)n–COOH with n=4, 8, 12 ...
Boisier, Grégory +4 more
core +2 more sources
Chimica Techno Acta, 2021 The synthesis of new derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid is described.
Alena I. Siutkina +2 more
doaj +1 more source
Synthesis of highly alkylated functionalized cyclopentadienes [PDF]
, 1988 Tetra- and pentaalkylated cyclopentadienyl ketones and carboxylic acids are prepared by electrophilic allylation of enolizible 1,3-dicarbonyl compounds and successive acid catalyzed ...
Koschinsky, Rainer +2 more
core +1 more source
Unravelling the surface chemistry of metal oxide nanocrystals, the role of acids and bases [PDF]
, 2014 We synthesized HfO2 nanocrystals from HfCl4 using a surfactant-free solvothermal process in benzyl alcohol and found that the resulting nanocrystals could be transferred to nonpolar media using a mixture of carboxylic acids and amines.
De Keukeleere, Katrien +5 more
core +1 more source
An enhanced procedure for measuring organic acids and methyl esters in PM2.5 [PDF]
Atmospheric Measurement Techniques, 2015 A solid-phase extraction (SPE) pretreatment procedure allowing organic acids to be separated from methyl esters in fine aerosol has been developed. The procedure first separates the organic acids from fatty acid methyl esters (FAMEs) and other nonacid ...
F. Liu +5 more
doaj +1 more source
Study of the content of carbonic acids in the herbs of Сapsella bursa-pastoris (L.) Medik
Фармацевтичний журнал, 2022 Carboxylic acids are key compounds that play an important role in metabolism. They activate the endocrine glands, affect human immune status, have antioxidant, antimicrobial and anti-inflammatory effects.
H. P. Smoilovska +3 more
doaj +1 more source
Room-Temperature Alternative to the Arbuzov Reaction: The Reductive Deoxygenation of Acyl Phosphonates [PDF]
, 2010 The reductive deoxygenation of acyl phosphonates using a Wolff−Kishner-like sequence is described. This transformation allows direct access to alkyl phosphonates from acyl phosphonates at room temperature. The method can be combined with acyl phosphonate
Dougherty, Dennis A. +1 more
core +2 more sources
Scientific Reports, 2020 The antioxidant activities of 18 typical phenolic acids were investigated using 2, 2′-diphenyl-1-picrylhydrazyl (DPPH) and ferric ion reducing antioxidant power (FRAP) assays.
Jinxiang Chen +5 more
semanticscholar +1 more source