Thiourea single crystals have been grown from aqueous solution by slow cooling technique. The stability of the saturated solutions of different pH values has been assessed by measuring the metastable zone width (MSZW) by a nucleation method. MSZW has been enhanced by the influence of pH of thiourea solution. The growth rate of the thiourea crystal along the c-direction [001] was found faster fo...

In order to prepare low-cost, biodegradable and processable adsorbent materials for adsorption of heavy metal ion, two kinds novel modified cottons (C-4-APD C-2-APZ) were obtained by introducing 4-aminopyridin 2-aminopyrazine into the surface degreasing cotton, respectively, used removal Cr(VI) ions from aqueous solution. The characterized Scanning Electron Microscopy (SEM), Fourier Transform I...

The present paper is focused on the extraction of gold from high-grade e-waste, i.e., spent electronic connectors and plates, by leaching electrowinning. These are usually made up an alloy covered a layer gold; sometimes, in some them, plastic part also present. applied system consisted acid solution diluted sulfuric (0.2 mol/L) with thiourea (20 g/L) as reagent ferric sulfate (21.8 oxidant. Th...

necessary conditions for callus production from leaf and stem explants of norfolk island pine (araucaria excelsa l.) have been studied. ms and bm culture media containing 0.2, 0.5, 1, 2 and 5 mg/l naa, iba, 2,4-d and picloram supplemented with 30 g/l sucrose were used. callus was initiated in both culture media only in the presence of picloram and in the dark, but bm culture medium produced mor...

The process of etching is the most crucial part of the work of manufacturing printed circuit boards (PCB). In the etching process by nitric acid, a spent etching waste solution of composition 250 g/L HNO3, 30-40 g/L Cu, 30-40 g/L Sn, 30-40 g/L Pb and 20-25 g/L Fe is produced. High metal concentrations in the spent etching waste solution make it a viable candidate for the recovery of metals. Rec...

Thiourea is the parent compound of a group of compounds known t.o have goitrogenic activity. These substances prevent the formation of organically bound iodine from iodide ion (l-6), but the mechanism of this action is unknown. ‘Paper I of this series (7) showed that when thiourea labeled with radioactive sulfur was administered to rats the concentration of radioactivity in the thyroid gland 24...

Memristive behavior is defined as a resistive switching loop which can be observed from the current-voltage (I-V) characteristic of a material. This paper reports the application of TiO2 (titania) nanostructures as an active layer for a memristive device instead of using titania thin film in nanoscale thickness as reported by other researchers. 60 nm thickness of titania thin film was deposited...