Results 91 to 100 of about 15,336 (235)

Synthesis and Anticancer Activity of Some New S-Glycosyl and S-Alkyl 1,2,4-Triazinone Derivatives

open access: yesMolecules, 2011
A series of S-glycosyl and S-alkyl derivatives of 4-amino-3-mercapto-6-(2-(2-thienyl)vinyl)-1,2,4-triazin-5(4H)-one (1) were synthesized using different halo compounds such as preacetylated sugar bromide, 4-bromobutylacetate, 2-acetoxyethoxy-methyl ...
Hosam A. Saad, Ahmed H. Moustafa
doaj   +1 more source

Study of improved resins for advanced supersonic technology composites. Part 1: Heteroaromatic polymers containing ether groups. Part 2: Curing chemistry of aromatic polymers and composite studies [PDF]

open access: yes
Fourteen ether-containing, aromatic dianhydrides have been synthesized from N-phenyl-3 or 4-nitrophthalimide and various bisphenols. The process involves nucleophilic displacement of activated nitro groups with bisphenolate ions.
Hillig, W. B.   +2 more
core   +1 more source

Oxalic acid as a heterogeneous ice nucleus in the upper troposphere and its indirect aerosol effect [PDF]

open access: yesAtmospheric Chemistry and Physics, 2006
Heterogeneous ice freezing points of aqueous solutions containing various immersed solid dicarboxylic acids (oxalic, adipic, succinic, phthalic and fumaric) have been measured with a differential scanning calorimeter.
B. Zobrist   +13 more
doaj  

Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment

open access: yesScientific Reports, 2017
To better understand the impact of East Asian pollutants on the molecular composition of marine organic aerosols, we conducted long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds in total suspended particulate ...
Suresh K. R. Boreddy   +2 more
doaj   +1 more source

Preparation and Biological Activities of Some Heterocyclic Compounds Derivatives from 2-Aminothiazoles

open access: yesNano Biomedicine and Engineering, 2018
In the current investigation, two series of 2-amino thiazole derivatives were prepared. The first series involved synthesis of (Z)-3-(thiazol-2-ylimino)indolin-2-one (A1) as Schiff base derivatives of 2-amino thiazole and isatin, then synthesis of ...
Faez Abdul-hussein Alrammahi
doaj   +1 more source

Research of possible synthesis of alkyd-styrene resins in belarus [PDF]

open access: yes, 2013
The article covers possible methods of synthesis of alkyd-styrene resins, formulations and areas of application this film-formers in paint production.
Prokopchuk, N. P.   +2 more
core  

Nuclear Magnetic Resonance Characterization of Water Soluble Organic Carbon of Atmospheric Aerosol Types

open access: yesNatural Product Communications, 2019
The water soluble organic carbon of the prevalent atmospheric aerosol sources (traffic exhausts, paved road dust, agricultural soil, native soil, wood combustion, epicuticular waxes from pine and broad-leaved trees, and pollen) has been characterized ...
Marie-Cecile G. Chalbot   +1 more
doaj   +1 more source

Kinetics of the reactions of the acid anhydrides with aromatic amines in aprotic solvents [PDF]

open access: yes
Work has revealed that diamine derivatives of diphenylmethane (IV), diphenyl ether (V), benzophenone (IV), fluorene (VII), and fluorenone (VIII) polymerizations with pyromellitic dianhydride in DMA were dependent on the basicity of the amine compound ...
Mason, J. G., Sugg, E.
core   +1 more source

Synthesis of asymmetric tetracarboxylic acids and corresponding dianhydrides [PDF]

open access: yes, 2008
This invention relates to processes for preparing asymmetrical biphenyl tetracarboxylic acids and the corresponding asymmetrical dianhydrides, namely 2,3,3',4'-biphenyl dianhydride (a-BPDA), 2,3,3',4'-benzophenone dianhydride (a-BTDA) and 3,4 ...
Chuang, Chun-Hua
core   +1 more source

Dicarboxylic acids, ketocarboxylic acids, α-dicarbonyls, fatty acids and benzoic acid in PM2.5 aerosol collected during CAREBeijing-2007: an effect of traffic restriction on air quality [PDF]

open access: yes, 2015
Thirty water-soluble organic species, including dicarboxylic acids, ketocarboxylic acids, α-dicarbonyls, fatty acids and benzoic acid were determined as well as organic carbon (OC), elemental carbon (EC) and water-soluble organic carbon (WSOC) in PM2.5 ...
Ho, KF   +7 more
core   +3 more sources

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