Pyrrolizidine alkaloids are plant secondary metabolites that have recently attracted attention as toxic contaminants in various foods and feeds they often harvested by accident. Furthermore, prove themselves hard to analyze due their wide structural range low concentration levels. However, even concentrations show behavior the form of chronic liver diseases possible carcinogenicity. Since sampl...

ABSTRACT Polyvinylpolypyrrolidone supported chlorosulfonic acid ([PVPP-SO3H]+Cl-) was synthesized and evaluated as a recoverable catalyst for the one-pot synthesis of hexahydroquinolines by reaction of arylaldehydes, dimedone (5,5-dimethylcyclohexane-1,3-dione) or 1,3-cyclohexanedione, ethylacetoacetate and ammonium acetate in high to excellent yield in ethanol at 70 °C. The [PVPP-SO3H]+Cl- cat...

Multiwalled carbon nanotubes (MWCNTs) have been functionalized with -SO3H groups using new three steps chemical routes. Firstly, OH groups have been attached to CNT surfaces through a radical reaction. The second step involves converting the hydroxyl groups into the oxide one and last step included the attachment of –SO3H groups on the MWCNTs surfaces in the presence of 1-butyl-3-methyl imidazo...

The cysteine residues in the active sites of certain proteins, including peroxiredoxin (Prx), Parkinson’s disease protein DJ-1, and glyceraldehyde-3-phosphate dehydrogenase (GAPDH), are more readily oxidized to sulfenic acid (Cys-SOH) than are other cysteines because of their environment. The unstable sulfenic acid undergoes further hyperoxidation to sulfinic (Cys-SO2H) and sulfonic (Cys-SO3H) ...

Ruthenium Nanoparticles In article number 2206806 by Alexis Bordet, Walter Leitner, and co-workers, the aqueous phase hydrogenation of CO2 to formate using Ru nanoparticles immobilized on supported ionic liquid phases ([email protected]) is reported. A synergistic enhancement catalyst activity productivity observed for sulfonic acid-functionalized [email protected](SO3H-X) materials, rationaliz...