Effect of different fillers on natural rubber compounds was investigated through curing, mechanical properties and morphology studies for improving mechanical performance of rubber articles. In this work, natural rubber blends with Silica as Single-filler compounds, and blends with Silica and Carbon black as Bi-filler compounds were considered. Then, natural rubber blends with Silica, Carbon bl...

High yield photolytic reduction of a series of thiaphosphoranes Z p SR to give Z p H with UV-light-induced tri-n-butyltin hydride through phosphoranyl radical Z p is described. This reaction is inhibited by a-methylstyrene and initiated by a radical initiator such as azobisisobutyronitrile

in order to study the effects of nitrogen and phosphorous application on yield and physiological parameters of sugar beet polygerm seed (cv. 7233), this study was conductedin 2000-2001 in ardabil agricultural research station (alarough). the experiment was carried out with two factors including nitrogen in 4 levels (0 as control, 100, 200 and 300 kg n/ha) and phosphorous in 3 levels (0 as contr...

A novel melamine-phosphate tri-functional acrylate (MPTO) was successfully synthesized via cyclization reaction of hexamethylolmelamine (HMM) with phosphorous oxychloride (POCl 3 ) followed by addition hydroxyethylmethacrylate (HEMA). The molecular structure MPTO identified FTIR and 1H-NMR, 13C-NMR, GC-MS spectra. oligomer impregnated polyurethane to make various formulations UV cured on wood g...

high yield photolytic reduction of a series of thiaphosphoranes z p sr to give z p h with uv-light-induced tri-n-butyltin hydride through phosphoranyl radical z p is described. this reaction is inhibited by a-methylstyrene and initiated by a radical initiator such as azobisisobutyronitrile

Sera from 20 patients with suspected or known coronary artery disease were measured for thyroxine (T4), tri-iodothyronine (T3), tri-iodothyronine uptake ratio (T3UR), thyroid stimulating hormone (TSH), and reverse tri-iodothyronine (rT3), before and after maximal or near-maximal exercise. On the average the patients achieved 92% (rang 68-108) of the predicted maximum heart rate. There were no s...

the main object of this study was to evaluate the effect of tillage and crop residues management of barley (hordeum vulgare l.) on quantification and qualification yield of corn (zea mays l.). treatments were laid out in complete randomized block design with seven treatments and three replications and include (1) fire of straw and stubble, plow, disc and furrower (2) gathering and transfer of s...

Abstract In this paper a fitted second-order finite difference method is presented for solving singularly perturbed two-point boundary value problems with the boundary layer at both end (left and right) points. We have introduced a fitting factor in second-order tri-diagonal finite difference scheme and it is obtained from the theory of singular perturbations. The efficient Thomas algorithm is ...

The phosphorous diffusion from atmospheric pressure chemical vapor deposition (APCVD) deposited phosphorus silicate glass (PSG) promises reduced process costs compared to the standard POCl3 diffusion process, since no POCl3 gas flow is necessary during the diffusion process. Therefore, much smaller or no spacing between the wafers is necessary and the throughput of the diffusion process can be ...

One of the research projects is concerned with the four-membered saturated inorganic ring system called cylcodiphosphazanes, which essen ally act as monoor bidentate ligands toward transi on metals. Deriva ves of cyclodiphosphazanes containing oxygen, sulphur, phosphorous or nitrogendonor-func onali es have shown versa le coordina on behaviour, resul ng in simple mononuclear to tri-, tetraor po...