نتایج جستجو برای: in the fi rst stage
تعداد نتایج: 21232379 فیلتر نتایج به سال:
the presence of three root canals in the distal root of the mandibular fi rst permanent molars is rare; based on in vitro studies its incidence is reported to be between 0.2% and 3%. with the advent of cone beam computed tomography (cbct) as an adjunctive diagnostic aid, the determination of root canal anatomy in teeth with extra canals and complex canal confi gurations has become more precise....
© 2012 Wiley-VCH Verlag Gm DOI: 10.1002/smll.201200971 For the fi rst time, a facile, one-pot hydrofl uoric acid vapor-phase hydrothermal (HF-VPH) method is demonstrated to directly grow single-crystalline anatase TiO 2 nanosheets with 98.2% of exposed {001} faceted surfaces on the Ti substrate via a distinctive two-stage formation mechanism. The fi rst stage produces a new intermediate crystal...
this research study aimed to investigate the relationship between field-dependence/independence cognitive style and vocabulary learning strategies among iranian efl learners. ninety participants majoring in english translation at arak university were chosen. the participants were classified into two groups of field-dependent and independent based on the results of group embedded figure test (ge...
abstract: sayyed mohammad tabatabaee is accounted as one of the effective persons in iran contemporaneoushistory and his role in the events of iran constitution revolution is inevitable. sayyed mohammad tabatabaee from the time of naser al din shah qajar and arrival to iran, informed of the advantages and the basis of constitution, was in the thought of making the iran rule as a constituti...
We develop a general equilibrium model with heterogeneous fi rms à la Melitz (2003), where both the government and fi rms can invest into R&D to improve the country’s technological potential. A higher technological potential raises the average productivity of fi rms, thus implying lower consumer prices, and eventually leads to a welfare gain. The government’s public and fi rms’ private investme...
abstract: about 60% of total premium of insurance industry is pertained?to life policies in the world; while the life insurance total premium in iran is less than 6% of total premium in insurance industry in 2008 (sigma, no 3/2009). among the reasons that discourage the life insurance industry is the problem of adverse selection. adverse selection theory describes a situation where the inf...
Objectives The revised Reinforcement Sensitivity Theory (RST) has a decisive role in the different dimensions of behavior, emotions, personality and pathology of children. The goal of this research was to validate RST in children. Methods The research is descriptive correlational. The statistical population included all school children in Hamedan City, Iran in 2018 academic year. Study partici...
Background: One of the main sunfl ower diseases is the white mold Sclerotinia sclerotiorum. The oxalic acid (OA), which is one of the main pathogenicity factors of this fungus, beside the direct toxicity on the host, has other functions such as the disruption of the cell wall and chelating out the calcium ions.Objectives: Regarding the importance of this disease, it is im...
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