Surface modification of titanium dioxide (TiO2) nanoparticle is essential to control its surface properties, thereby to enhance its cell penetration capability, reduce its cytotoxicity, or improve its biocompatibility. In order to graft polyvinyl acetate onto TiO2 nanoparticles, xanthate was chemically immobilized on the surface of TiO2 by acylation followed by nucleophilic substitution with a ...

Xanthates (alkyl or aryl derivatives of dithiocarbonic acid) have been shown to be selective mechanism-based inactivators of cytochromes P450 2B1/2B6 and 2E1 due to covalent binding of a reactive intermediate to apoprotein after double hydrogen abstraction at α-carbon atom, suggesting interaction of the xanthate dithiocarbonic head with the enzyme heme. The structures of xanthates with a long a...

In this research, quantities of carbon nanospheres (CNSs) were prepared with a convenient and low cost method at atmospheric pressure and functionalized with the xanthate group in a simple way. The materials were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectra (FT-IR), and X-ray photoelectron spectroscopy (XPS). In addition, the c...

Carrier flotation is a technique that can recover fine particles by using coarse carrier during the process. In heterogeneous flotation, mineral of different minerals are used as carriers to particles. By Cu2+-treated pyrite carriers, chalcopyrite recovery could be improved. However, disadvantage this it requires post-flotation separation process improve grade final Cu concentrate. This study t...

O-isopropyl-N-ethyl thionocarbamate (IPETC) collector was used to selectively recover elemental sulfur from a high-sulfur residue, and its flotation performance, structure–property relationship adsorption mechanism were studied. The raw ore test showed that IPETC displayed superior performance the compared with sodium ethyl xanthate (SEX) ammonium dibutyl dithiophosphate (ADDTP) collectors. Pur...

The reactivity of the protonated and hydroxylated sphalerite (1 1 0) surface with xanthate was simulated using the density functional theory (DFT). The difference between the energy of the lowest unoccupied molecular orbital of the sphalerite surface and the energy of the highest occupied molecular orbital of xanthate (  was used to compare the reaction capability of xanthate with fresh and fun...

Square-wave cathodic adsorptive stripping voltammetry based on adsorptive accumulation is a very sensitive technique for the trace determination of xanthosine 50-monophosphate (50-XMP) and xanthosine 50-diphosphate (50-XDP). The determination is based on the strong interaction of the adsorption of xanthosine phosphate compounds on a mercury electrode surface, forming Hg(II)-xanthate. The cathod...

• Cu 2+ -treated pyrite improved fine chalcopyrite flotation recovery as a carrier. CuSO 4 treatment of its hydrophobic interactions with particles. The mineral particles in is limited owing to the low collision probability between and air bubbles. carrier method can enhance particle by attaching fines coarse In this study, an attempt was made improve using Flotation experiments for finely grou...

In the title compound, [Ru(CH3OCS2)2(C18H15P)2], the Ru(II) atom is in a distorted octa-hedral coordination by two xanthate anions (CH3OCS2) and two tri-phenyl-phosphane (PPh3) ligands. Both bidentate xanthate ligands coordinate the Ru(II) atom with two slightly different Ru-S bond lengths but with virtually equal bite angles [71.57 (4) and 71.58 (3)°]. The packing of the complexes is assured b...