Functional organic compounds

Ten aromatic aldazines: 4-nitrobenzal-, 3-nitrobenzal-, 2-nitrobenzal-, 4-dimethylaminobenzal-, 4-methoxybenzal-, 3-methoxybenzal-, 4-fluorobenzal-, 4-chlorobenzal-, 4-bromobenzaldazine and 7-carboxymethoxy-6-hydroxy-3-sulfoquinolin-5-carbaldazine, were synthesized by condensing two equivalents of an appropriate aldehyde with one equivalent of hydrazine hydrate. The structure of the received aldazines was determined by IR, 1H-NMR and ESI MS spectra.

6p tamynhan8 04-11-2020 14 2   Download

This study investigates the adsorption mechanism of 2-butanone (ethyl methyl ketone) on the surface of graphene by using Density Functionals Theory (DFT). A 2-butanone molecule was chosen as a selected example of main volatile organic compounds (VOCs) in exhaled breath.

9p tamynhan6 14-09-2020 12 1   Download

In this work, we investigate the defect structure of silicene with a vancacy and the adsorption mechanism of isopropanol on the surface of defected silicene by employing the Density Functional Theory method.

8p tamynhan6 14-09-2020 15 2   Download

GlutathioneS-transferases (EC 2.5.1.18) (GSTs), are a family of multifunctional enzymes present in all living organisms whose main function is the detoxification of electrophilic compounds. GSTs are considered the most prominent detoxifying class II enzymes in helminths. We describehere the characterizationof novel dehydroascorbate reductase and thiol transferase activities that reside in the human parasite Schistosoma mansoni GSTx.

10p tumor12 22-04-2013 29 2   Download

The polyamines putrescine, spermidine and spermine are organic cations shown to participate in a bewildering num-ber of cellular reactions, yet their exact functions in inter-mediary metabolism and specific interactions with cellular components remain largely elusive. Pharmacological inter-ventions have demonstrated convincingly that a steady supply of these compounds is a prerequisite for cell prolif-eration to occur.

18p dell39 03-04-2013 40 4   Download

The intracellular accumulation of low molecular mass organic compounds in response to stressful conditions was investigated in the thermophilic bacterium Petrotoga miotherma, a member of the order Thermotogales. This led to the discovery of a new solute, whose structure was established as a-d-mannopyranosyl-(1fi2)-a-d-glucopyranosyl-(1 fi2)-glycerate (MGG) by MMR spectroscopy and MS.

8p galaxyss3 19-03-2013 21 3   Download

Vitamin B6 is one of the most important compounds in living organisms, and its biosynthesis has only recently been understood. Because it is required for more than 100 biochemical reactions, lack of the vitamin is fatal. This is of special importance to mammals and humans, which cannot biosynthesize the vitamin and thus depend on its external uptake. Here we describe the cloning of a vitamin B6 biosynthetic gene GbPDX1from Ginkgo biloba.

10p media19 06-03-2013 34 1   Download

We report the effects of stabilizing osmolytes (low molecular mass organic compounds that raise the midpoint of thermal denaturation) on the stabil-ity and function of RNase-A under physiological conditions (pH 6.0 and 25C). Measurements of Gibbs free energy change at 25C(DGD) and kinetic parameters, Michaelis constant (Km) and catalytic constant (kcat )of the enzyme mediated hydrolysis of cytidine monophosphate

9p viettel02 20-02-2013 43 2   Download

In organic chemistry, a carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom: C=O. It is common to several classes of organic compounds, as part of many larger functional groups. The term carbonyl can also refer to carbon monoxide as a ligand in an inorganic or organometallic complex. Other organic carbonyls are urea and the carbamates, the derivatives of acyl chlorides chloroformates and phosgene, carbonate esters, thioesters, lactones, lactams, hydroxamates, and isocyanates.

68p loc5heo 07-06-2011 122 14   Download