Results 31 to 40 of about 115,061 (305)

Introduction of functional groups on polyethylene surfaces by a carbon dioxide plasma treatment [PDF]

open access: yes, 1995
Poly(ethylene) (PE) films were treated with a carbon dioxide (CO2) plasma to study the formation of oxygen-containing functional groups at the surface. Modified and nonmodified films were characterized by X-ray photoelectron spectroscopy (XPS) and water ...
Feijen, Jan   +3 more
core   +2 more sources

An Efficient Perlite/Fe3O4 Magnetic Nanocatalyst for Carbon Dioxide Fixation Under Solvent-free Conditions at Atmospheric Pressure of CO2 [PDF]

open access: yesشیمی کاربردی روز
The increasing reliance, on fuels has led to an increase in the levels of carbon dioxide causing concerning outcomes like climate change and global warming. In response to this problem, there is a solution; CO2 fixation.
Farshid Eskandari, Mohammad Bayat
doaj   +1 more source

SYNTHESIS OF PINONIC ACID NEW DERIVATIVES [PDF]

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2008
The method for synthetising new derivatives of the pinonic acid using, at the key step, the reaction of condensation with epichlorohydrin, has been elaborated.
Alexandru Gudima   +2 more
doaj  

Recent Developments in Stereoselective Reactions of Sulfonium Ylides

open access: yesOrganics, 2022
This review describes advances in the literature since the mid-1990s in the area of reactions of sulfonium ylide chemistry, with particular attention paid to stereoselective examples.
Mukulesh Mondal   +4 more
doaj   +1 more source

Metal-organic frameworks as selective or chiral oxidation catalysts [PDF]

open access: yes, 2014
Since the discovery of Metal Organic Frameworks (MOFs) in the early 1990s, the amount of new structures has grown exponentially. A MOF typically consists of inorganic nodes that are connected by organic linkers to form crystalline, highly porous ...
Leus, Karen   +2 more
core   +1 more source

2,6-exo-8,10-exo-4-Butyl-9-oxa-4-azatetracyclo[5.3.1.02,6.08,10]undecane-3,5-dione

open access: yesMolbank, 2022
The title epoxide was obtained by spontaneous epoxidation of the corresponding unsaturated imide in air or by peracid oxidation. Unambiguous assignment of the 1H- and 13C-NMR spectra is achieved by comparison between analogous compounds and its X-ray ...
R. Alan Aitken   +2 more
doaj   +1 more source

Aspochalasin H1: A New Cyclic Aspochalasin from Hawaiian Plant-Associated Endophytic Fungus Aspergillus sp. FT1307

open access: yesMolecules, 2021
Aspergillus is one of the most diverse genera, and it is chemically profound and known to produce many biologically active secondary metabolites. In the present study, a new aspochalasin H1 (1), together with nine known compounds (2–10), were isolated ...
Mallique Qader   +5 more
doaj   +1 more source

A single meal has the potential to alter brain oxylipin content. [PDF]

open access: yes, 2020
Our objective was to determine whether consumption of a single meal has the potential to alter brain oxylipin content. We examined the cerebrum of mice fed a single high-fat/high-sucrose Western meal or a low-fat/low-sucrose control meal, as well as ...
Aung, HH   +5 more
core   +1 more source

Enzyme-catalyzed cationic epoxide rearrangements in quinolone alkaloid biosynthesis. [PDF]

open access: yes, 2017
Epoxides are highly useful synthons and biosynthons for the construction of complex natural products during total synthesis and biosynthesis, respectively.
Garcia-Borràs, Marc   +8 more
core  

Acute Hypercapnia/Ischemia Alters the Esterification of Arachidonic Acid and Docosahexaenoic Acid Epoxide Metabolites in Rat Brain Neutral Lipids. [PDF]

open access: yes, 2020
In the brain, approximately 90% of oxylipins are esterified to lipids. However, the significance of this esterification process is not known. In the present study, we (1) validated an aminopropyl solid phase extraction (SPE) method for separating ...
Bazinet, Richard P   +7 more
core   +1 more source

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