Results 31 to 40 of about 2,535,957 (290)

Deuterium MAS NMR Studies of Dynamics on Multiple Timescales: Histidine and Oxalic Acid. [PDF]

open access: yes, 2014
International audience ; Deuterium ((2) H) magic-angle spinning (MAS) nuclear magnetic resonance is applied to monitor the dynamics of the exchanging labile deuterons of polycrystalline L-histidine hydrochloride monohydrate-d7 and α-oxalic acid dihydrate-
Gervais, Christel   +4 more
core   +3 more sources

Synthesis of Pregnenolone and Methyl Lithocholate Oxalate Derivatives

open access: yesNatural Product Communications, 2008
Five new steroidal oxalate derivatives, oxalic acid (pregn-5-en-20-one)-3β-yl ethyl ester ( 2 ), oxalic acid mono (pregn-5-en-20-one)-3β-yl ester ( 3 ), chloro-oxo-acetic acid (5β-cholan-24-oic acid methyl ester)-3α-yl ester ( 5 ), oxalic acid mono (5β ...
Lutfun Nahar   +2 more
doaj   +1 more source

Oxalic acid degradation from aqueous solution using ozonation process in the presence of magnesium oxide nanoparticles catalyst stabilized on activated carbon

open access: yesInternational Journal of Environmental Health Engineering, 2016
Aims: In this work, activated carbon, magnesium oxide (MgO), and MgO stabilized on activated carbon derived from sweet corn were applied as catalysts for oxalic acid degradation from aqueous.
Sara Haidari   +4 more
doaj   +1 more source

Biological Control of Meloidogyne incognita by Aspergillus niger F22 Producing Oxalic Acid. [PDF]

open access: yesPLoS ONE, 2016
Restricted usage of chemical nematicides has led to development of environmentally safe alternatives. A culture filtrate of Aspergillus niger F22 was highly active against Meloidogyne incognita with marked mortality of second-stage juveniles (J2s) and ...
Ja Yeong Jang   +13 more
doaj   +1 more source

The Eeffect of Soaking on the Soluble Oxalic Acid Content of Spinach [PDF]

open access: yes, 2014
Oxalic acid is a primary risk factor of kidney stones. Leafy vegetables such as spinach are known to moderate amounts of soluble and insoluble oxalic acid.
Shimada, Yoshihiro
core   +1 more source

Direct Sulfonamidation of Primary and Secondary Benzylic Alcohols Catalyzed by a Boronic Acid/Oxalic Acid System

open access: yes, 2017
The direct sulfonamidation of primary and secondary benzylic alcohols catalyzed by a 2,3,4,5‐tetrafluorophenylboronic acid/oxalic acid co‐catalytic system was examined. The reaction proceeds under mild conditions with readily available starting materials
Ward, Robert M.   +2 more
core   +1 more source

Superlubricity and Corrosion Inhibition Properties of Solvate Ionic Liquids in Hybrid Carbon Fiber Reinforced Plastic–Steel Interfaces

open access: yesAdvanced Engineering Materials, EarlyView.
Solvate ionic liquids lubrication reduced the coefficient of friction by ∼60% compared to dry sliding, reaching steady‐state values as low as 0.04–0.05. Corrosion weight‐loss measurements in 1 M HCl further demonstrated significant inhibition behavior, with only 100 ppm of [Li(G3)][TFSI] (∼68.5 μL/L) reducing corrosion‐product weight loss by 63 ...
Sameh Dabees   +6 more
wiley   +1 more source

High variability of the heterogeneous ice nucleation potential of oxalic acid dihydrate and sodium oxalate [PDF]

open access: yesAtmospheric Chemistry and Physics, 2010
The heterogeneous ice nucleation potential of airborne oxalic acid dihydrate and sodium oxalate particles in the deposition and condensation mode has been investigated by controlled expansion cooling cycles in the AIDA aerosol and cloud chamber of the ...
R. Wagner   +4 more
doaj   +1 more source

A Comparative Study of Acid-Activated Aluminium and Ferruginous Smectite in Oxalic Acid of Various Concentrations

open access: yesMaterials Proceedings, 2022
Acid activation is a chemical modification of minerals and mainly smectites, in order to enhance their surface properties and reinforce their adsorption capacity for specific ions.
Danai Tsakiri   +2 more
doaj   +1 more source

A Geometrically Transient Platform for Bioelectronic Implants

open access: yesAdvanced Materials, EarlyView.
Minimally invasive bioelectronic implants often compromise performance for smaller sizes. To resolve this optimization dilemma, a wireless bioelectronic implant with a transient geometry is introduced (MiFi). The origami‐inspired device miniaturizes up to sixfold for syringe insertion and autonomously unfolds post‐implantation.
Selin Olenik   +13 more
wiley   +1 more source

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