Ricerc@Sapienza

Strongly hydrophilic gold nanoparticles (AuNPs), functionalized with citrate and L-cysteine, were synthetized and used as Resveratrol (RSV) vehicle to improve its bioavailability. Two different conjugation procedures were investigated: the first by adding RSV during AuNPs synthesis (1) and the second by adding RSV after AuNPs synthesis (2). The two different conjugated systems, namely AuNPs@RSV1 and AuNPs@RSV2 respectively, showed good loading efficiency (η%): η1 = 80 ± 5% for AuNPs@RSV1 and η2 = 20 ± 3% for AuNPs@RSV2.

Enzyme immobilization on nanocarriers is nowadays considered a useful tool for improving activity and maintaining biocatalysts stability while facilitating their recovery and reuse. In this work we prepared Au and Ag based nanoparticles (AuNPs or AgNPs) stabilized with two different ligands, the organometallic dinuclear complex trans,trans-[dithiodibis(tributylphosphine)diplatinum(II)-4,4'-diethynylbiphenyl] (Pt-DEBP) and the organic dithiol 4,4'-dithiol-biphenyl (BI), able to link the NPs in 3D networks.

Abstract: Bottom and fly ashes from a hazardous waste incineration plant, which showed a high concentration of Mo in a leaching test, have been treated to decrease its leachability to below the limit set by the laws in force for admittance to a non-hazardous waste landfill. Both ashes have a basic pH, that is, of around 11–13, therefore most of the molybdenum species were expected to be in the form of molybdate ions (MoO42−), the most soluble molybdenum compound.