this work is presented in five parts. in the first part preparation of the starting complex [pt(c^n)cl(dmso)], 1, in which c^n = n(1),c(2?)-chelated, deprotonated 2-phenylpyridine, and dmso = dimethylsulfoxide, and its reaction with 1 equiv of the biphosphine ligands bis(diphenylphosphino)amine, dppa, or bis(diphenylphosphino)methane, dppm, to give the complex [pt(c^n)cl(dppa)], 2, or [pt(c^n)c...

  Pegah is a new forage sorghum cultivar, improved in Iran. It is derived from progenies of a cross made between Early orange (Farian) and LFS56 (Local selected germ[lasm) cultivars. Its improvement took 15 years from crossing up to releazing time. All selections and evaluations were made in SPII and its associated research centers in Iran. Pegah is a pure line variety and its seed production i...

current studies in second language (l2) learning have revealed the positive role of corrective feedback (cf) in both oral and written forms in different language features. the present study was an attempt to investigate the effect of both direct and indirect written corrective feedback (wcf) on the use of grammatical collocations in l2 writing. the study also sought to examine whether the effec...

abstract previous studies on willingness to communicate (wtc) have shown the influence of many individual or situational factors on students’ tendency to engage in classroom communication, in which wtc has been viewed either at the trait-level or situational level. however, due to the complexity of the notion of willingness to communicate, the present study suggests that these two strands are ...

this research concentrates on the lithostratigraphy, biostratigraphy, microfacies and sedimentary environment of the asmari and gachsaran formations at southwest firuzabad. the thickness of the studied section in all 608.95 meters that 220.8 meters belong to the asmari formation and 387.95 meters belong to the gachsaran formation (champe and mol members). in the study area, the asmari formation...

This cross-sectional study was carried out on 23 patients who underwent total hip arthroplasty(THA) following unsuccessful treatment of femoral neck fracture. The goal of the present study was to determine the results of THA as a therapeutic choice for patients with failed treatment of femoral neck fracture and to compare the results of THA in two groups of treated patients with two d...