Results 41 to 50 of about 15,169 (208)

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

Influence of organic molecules on the aggregation of TiO2 nanoparticles in acidic conditions [PDF]

open access: yes, 2009
Engineered nanoparticles released into the environment may interact with natural organic matter (NOM). Surface complexation affects the surface potential, which in turn may lead to aggregation of the particles.
Abdel Motaal   +385 more
core   +3 more sources

o‐Terphenyl‐Based Family of Conjugated Macrocycles: Selective Recognition of Phenylalanine in Water and Interaction With Insulin

open access: yesAngewandte Chemie International Edition, EarlyView.
This study presents the synthesis and binding properties of a new family of o‐terphenyl‐based macrocycles, TP[n] (n = 2‐8). The trimer variant efficiently binds phenylalanine in water with a 10‐fold selectivity compared to other amino acids and aromatic neurotransmitters.
Swapnil Ghule   +5 more
wiley   +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  

Adsorption Characteristics and Mechanisms of Dibutyl Phthalate on Nanomaterials

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Dibutyl phthalate (DBP) is a widely used plasticizer whose environmental release poses significant risks to ecosystems and human health. This study systematically investigated DBP adsorption on three common nanomaterials—titanium dioxide nanoparticles (n‐TiO2), multiwalled carbon nanotubes (MWCNTs), and carboxylated MWCNTs (MWCNTs‐COOH)—using ...
Ying Wang   +3 more
wiley   +1 more source

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  

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: yesAtmospheric Chemistry and Physics, 2009
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
K. Sieg   +5 more
doaj  

Induction of the synthesis of bioactive compounds of the marine alga Tetraselmis tetrathele (West) Butcher grown under salinity stress

open access: yesEgyptian Journal of Aquatic Research, 2016
This work aims at the induction of the synthesis bioactive compounds in microalgae which are used in aquacultures. Experiments were done using Tetraselmis tetrathele in batch culture for 8 days under different salinity levels.
Hala Yassin El-Kassas   +1 more
doaj   +1 more source

Stabilized unsaturated polyesters [PDF]

open access: yes, 1985
An unsaturated polyester, such as propylene glycolmaleic acid phthalic acid prepolymer dissolved in styrene is interpolymerized with an ultraviolet absorber and/or an antioxidant.
Borsig, E., Vogl, O.
core   +1 more source

Synthetic versatility of nanoparticles: A new, rapid, one-pot, single-step synthetic approach to spherical mesoporous (metal) oxide nanoparticles using supercritical alcohols [PDF]

open access: yes, 2014
A simple, rapid (10 min), one-pot, single-step method for the preparation of solid and hollow spherical porous TiO_2 nanoparticles with large surface areas (100-211 m^2/g) was developed in supercritical alcohols using carboxylic acids as organic ...
1288, 1289, Kobiro, Kazuya, Wang, Pengyu
core   +2 more sources

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