Au-Ag noble metal wastes represent a wide range of waste types and forms with various ballast elements and components. The thiourea process of gold and silver extraction from ores, concentrates or secondary raw materials consists of gold and silver leaching into the thiourea solution and the consequent precipitation of these metals from the solution. Due to the non-toxic character of thiourea i...

in this study, the effect of application time (immediately and one week after harvest) of some chemicals (rindite, carbon disulphide, gibberellic acid and thiourea) on breaking of dormancy and sprouting of potato (solanum tuberosum l., cv., marfona) minitubers was investigated. for the carbon disulphide (25 ml m-3 for four days) and rindite (0.2 ml l-1 for two days) application, minitubers were...

1-(8-Hydroxy quinolin-2yl-methyl) thiourea ligand (HTF) was synthesized from 8-hydroxyquinoline and thiourea with formaldehyde by condensation method in N,N-dimethyl foramide medium. The metal complexes Zn(II), Cu(II), Ni(II) and Co(II) were prepared using the 1-(8-hydroxy quinolin-2yl-methyl) thiourea as ligand. The ligand and its metal complexes were characterized by elemental analysis, FT-IR...

A series of thiourea and isothiouronium salt derivatives of the aglycone of teicoplanin was prepared by reaction of the terminal amino group with isothiocyanates, followed by S-alkylation of the thiourea compounds. Unexpectedly, the two classes of derivatives show a similar in vitro antibacterial activity against Gram-positive bacteria. Thiourea compounds, due to the lack of a positively charge...

A variety of organocatalysts were screened for the catalysis of the naphthoquinone monoketal Diels-Alder reaction. In this study we found that Schreiner's thiourea catalyst 10 and Jacobson's thiourea catalyst 12 facilitate the cycloaddition of the sterically hindered naphthoquinone monoketal dienophile 3 with diene 4. The use of thiourea catalysis allowed for the first time the highly selective...

However, the conventional gold recovery process is cyanidation, due to the recent environmental laws; researchers are looking for alternative methods for the recovery of gold. Furthermore, the copper anode slime is one of the most important secondary sources of gold (about 1200 ppm). So, the main objective of the current work is gold separation from copper anode slime as a rich secondary source...

A new T-grafting photosensitizer of Dye-Sensitized Solar Cell (DSSC) has been developed by aligning Donor-Acceptor (D-A) group in an axially chiral BODIPY. Synthesis the dye was conducted over a linear approach involving one-pot, non-oxidative synthesis 1,3,5,7-tetramethyl-8-(o-methoxyphenyl)BODIPY, bromination, and finally C2/C6 ethyl acrylate Pd-Heck coupling to produce 65% 2-ethylacrylic-1,3...

A series of 1-acyl-3-(2'-aminophenyl) thiourea derivatives were designed and synthesized. The structures of all the newly synthesized compounds were identified by IR, elemental analysis, ¹H-NMR and ¹³C-NMR. Their anti-intestinal nematode activities against Nippostrongylus brazilliensis were evaluated in rats by an oral route. Among these compounds, at concentrations of 10 mg/kg of rat, compound...

A series of novel thiourea based receptors (1-12) with different signaling units and spacers have been synthesized for the detection of cyanide ion. Among these receptors, 4,4'-bis-[3-(4-cyanophenyl)thiourea]diphenyl sulfide 6 and 4,4'-bis-[3-(3-cyanophenyl)thiourea]diphenyl sulfide 9 exhibited selective detection of cyanide by the naked-eye as well as by UV-Vis spectroscopy. Furthermore, the c...