نتایج جستجو برای: visual assessment base metal
تعداد نتایج: 1329372 فیلتر نتایج به سال:
nothing affects learners more than assessment, so it is important to involve them in assessment process. involvment of learners in assessment helps them to become autonoumos learners. despite this importance iranian learners specialy javanroodian ones are not activily involved in the process. hence the aim of this thesis is to invesrtigate thier ability in th eassessment process
First, Schiff base iminopyridine ligand has been prepared by the condensation between primary amine, dimethylaniline and active carbonyl group of pyridine carboxaldehyde, then related complexes were synthesized in methanol solution. The ligand and metal complexes have been characterized by elemental analysis, UV, IR, 1 H NMR and 13CNMR spectroscopy. The spectroscopic data of metal complexes ind...
In nucleic acid chemistry, metal-mediated base pairs represent a versatile method for the site-specific introduction of metal-based functionality. In metal-mediated base pairs, the hydrogen bonds between complementary nucleobases are replaced by coordinate bonds to one or two transition metal ions located in the helical core. In recent years, the concept of metal-mediated base pairing has found...
In this study, the effect of welding heat input on microstructure and mechanical properties of dissimilar joints of API-X42 and API-B pipeline steels was investigated. Evaluation of the microstructures showed that increasing the welding heat input decreased acicular ferrite in weld metal microstructure, while amount of Widmanstatten ferrite, polygonal ferrite and grain boundary ferrite increase...
the formation constants and gibbs free energy for the interaction of rnsnclm (n = m = 2, r = me, ph, n-bu or n = 4, m = 0, r = ph) compounds as acceptors, with ml complexes (h2l = n,n'-bis(salicylidene)-2-aminobenzylamine (salabza-h2) and its derivatives, m = mn2+ or zn2+), as donors in n,n'-dimethylformamide (dmf) as solvent were studied. these parameters were measured by using uv-vis spectrop...
A metal-mediated base pair that discriminates between the canonical pyrimidine nucleobases S1 A metal-mediated base pair that discriminates between the canonical pyrimidine nucleobases
Background and Aims: The aim of this study was to evaluate the effect of zirconia and base metal cores on the color of restorations. Furthermore, the effect of different backings on the color of cercon zirconia was evaluated.Materials and Methods: The specimens were Cercon zirconia and metal ceramic discs with "high Au" and "base metal" alloys. Cercon zirconia discs were veneered with veneering...
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