Results 31 to 40 of about 5,136,187 (237)

Seasonal variations of water-soluble organic carbon, dicarboxylic acids, ketocarboxylic acids, and α-dicarbonyls in Central Himalayan aerosols [PDF]

open access: yesAtmospheric Chemistry and Physics, 2012
Aerosol samples were collected from a high elevation mountain site (Nainital, India; 1958 m a.s.l.) in the central Himalayas, a location that provides an isolated platform above the planetary boundary layer to better understand the composition of the ...
P. Hegde, K. Kawamura
doaj   +1 more source

Oxidative Degradation of Cardiotoxic Anticancer Anthracyclines to Phthalic Acids

open access: yesJournal of Biological Chemistry, 2004
We show that the pseudoperoxidase activity of ferrylmyoglobin (MbIV) promotes oxidative degradation of doxorubicin (DOX), an anticancer anthracycline known to induce severe cardiotoxicity.
A. Cartoni   +8 more
semanticscholar   +1 more source

Analysis of chemical signatures of alkaliphiles using fatty acid methyl ester analysis

open access: yesJournal of Pharmacy and Bioallied Sciences, 2017
Background: Fatty acids occur in nearly all living organisms as the important predominant constituents of lipids. While all fatty acids have essentially the same chemical nature, they are an extremely diverse group of compounds. Materials and Methods: To
Basha Sreenivasulu   +5 more
doaj   +1 more source

Fe3O4@SiO2–SO3H Nanoparticles: An efficient magnetically retrievable catalyst for esterification reactions [PDF]

open access: yesJournal of Particle Science and Technology, 2018
In this study, magnetite nanoparticles were obtained from Fe(II) and Fe(III) salts in an alkaline medium. The nanoparticles were then protected from oxidation by a silica shell formed by the sol-gel method using tetraethoxy orthosilicate (TEOS) in an ...
Zeynab Shahedi, Yagoub Mansoori
doaj   +1 more source

Concentrations of higher dicarboxylic acids C5 – C13 in fresh snow samples collected at the High Alpine Research Station Jungfraujoch during CLACE 5 and 6 [PDF]

open access: yes, 2008
Samples of freshly fallen snow were collected at the high alpine research station Jungfraujoch (Switzerland) in February and March 2006 and 2007, during the Cloud and Aerosol Characterization Experiments (CLACE) 5 and 6. In this study a new technique has
Fries, Elke   +5 more
core  

Major biotransformation of phthalic acid esters in Eisenia fetida: Mechanistic insights and association with catalytic enzymes and intestinal symbionts

open access: yesEnvironment International, 2023
Phthalic acid esters (PAEs) are an important group of organic pollutants that are widely used as plasticizers in the environment. The PAEs in soil organisms are likely to be biotransformed into a variety of metabolites, and the combined toxicity of PAEs ...
Xiuli Fan   +7 more
doaj   +1 more source

Polyimide processing additives [PDF]

open access: yes, 1992
A process for preparing polyimides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly-(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range ...
Burks, Harold D.   +4 more
core   +1 more source

Synthetic Derivatives of Natural Alkaloid Harmine

open access: yesEurasian Chemico-Technological Journal, 2009
The indole alkaloid harmine was extracted from underground part of Peganum harmala L. With the purpose of obtaining the new biological active derivatives on base of alkaloid harmine the chemical modification was carried out.
M. M. Ismagulova   +4 more
doaj   +1 more source

Optical properties in the UV and visible spectral region of organic acids relevant to tropospheric aerosols [PDF]

open access: yesAtmospheric Chemistry and Physics, 2004
Refractive and absorption indices in the UV and visible region of selected aqueous organic acids relevant to tropospheric aerosols are reported. The acids investigated are the aliphatic dicarboxylic acids oxalic, malonic, tartronic, succinic and glutaric
C. E. Lund Myhre, C. J. Nielsen
doaj  

BIOLOGICAL ACTIVITY OF MONOSUBSTITUTED AMIDES OF PHTALIC ACIDS

open access: yesРазработка и регистрация лекарственных средств, 2019
Anthelmintic, insecticidal, anticoagulant, hemostatic activities of monosubstituted amides of phthalic acid were investigated. Insecticidal, anthelmintic and antico-agulant activities for investigated monosubstituted amides of phthalic and ...
N. V. Kolotova, A. V. Starkova
doaj  

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