Preparation and characterization of polyvinyl alcohol (PVA)-glycerol composite films incorporating nanosilica from municipal solid waste incinerator bottom ash.

This study investigates the fabrication of a composite film composed of polyvinyl alcohol (PVA) and glycerol, incorporating nanosilica derived from municipal solid waste incinerator bottom ash (BA). The nanosilica is blended with a PVA film-forming solution containing glycerol as a plasticizer. The composite films are characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM).

Modified tetra-oxygenated xanthones analogues as anti-MRSA and P. aeruginosa agent and their synergism with vancomycin.

Five isolated xanthones from the C. cochinchinense and G. mangostana were evaluated and tested for antibacterial activities.

Crystal structure of ()-'-(3,4-di-hydroxy-benzyl-idene)-4-hy-droxy-benzohydrazide.

In the title benzohydrazide derivative, CHNO, the azomethine C=N double bond has an configuration. The hydrazide connecting bridge, (C=O)-(NH)-N=(CH), is nearly planar with C-C-N-N and C-N-N=C torsion angles of -177.33 (10) and -174.

Synthesis, spectroscopic and Hirshfeld surface analysis and fluorescence studies of (2,2')-3,3'-(1,4-phenyl-ene)bis-[1-(4-hy-droxy-phen-yl)prop-2-en-1-one] ,-di-methyl-formamide disolvate.

In the bis-chalcone mol-ecule of the title compound, CHO·2CHNO, the central benzene and terminal hy-droxy-phenyl rings form a dihedral angle of 14.28 (11)° and the central C=C double bond adopts a configuration. In the crystal, the bis-chalcone and solvate mol-ecules are inter-connected O-H⋯O hydrogen bonds, which were investigated by Hirshfeld surface analysis.

Crystal structure of ()-4-hy-droxy-'-(3-meth-oxy-benzyl-idene)benzohydrazide.

The title compound, CHNO, crystallizes with two independent mol-ecules ( and ) in the asymmetric unit that differ in the orientation of the 3-meth-oxy-phenyl group with respect to the methyl-idenebenzohydrazide unit. The dihedral angles between the two benzene rings are 24.02 (10) and 29.