Effect of Gold Nanoparticles on the Physical Properties of an Epoxy Resin.

The effect of doping the bisphenol A diglycidyl ether (DGEBA)/m-xylylenediamine (mXDA) system with gold nanoparticles (AuNP) has been studied with differential scanning calorimetry (DSC), thermogravimetric analysis, dynamic mechanical analysis (DMA), and dielectric analysis (DEA). The evolved heat (Δ), the glass transition temperature (), and the associated activation energies of this relaxation process have been determined. Below a certain concentration of AuNPs (=8.

Extraction and Physicochemical Characterization of Chitin Derived from the Asian Hornet, Lepeletier 1836 (Hym.: Vespidae).

Fifteen years ago, at least one multimated female yellow-legged Asian hornet ( Lepeletier 1836) arrived in France, which gave rise to a pan-European invasion. In this study, the isolation and characterization of chitin (CHI) that was obtained from (CHI) is described. In addition, an easy procedure is carried out to capture the raw insect, selectively and with high rates of success.