TiO2 nano-particles were used in electroless plating bath to obtain Ni/P/nano-composite coatings. The coatings were heat treated at 200, 400, 600 and 700 oC and their chemical and physical properties were investigated and it was found that 400 oC was the optimum temperature for the heat treatment of the coatings. The micro-hardness test of coatings showed that t...

introduction: tympanoplasty is indicated to restore hearing disability and prevent recurrent otorrhea.  materials and methods: this study was a retrospective review of patients who underwent tympanoplasty with or without mastoidectomy over a 1-year period.  results: a total of 789 tympanoplasties were reviewed, with a male-to-female ratio of 1:1.1. in total, 91% and 9% of tympanoplasties were p...

among the four important factors in the educational contexts, namely, teachers, learners, textbooks and contexts, textbooks play an important role in english language teaching (elt), particularly in the english as a foreign language (efl) classroom where it provides the primary source of linguistic input. the wealth of published material for english language teaching (elt) available in the mark...

this study aimed at providing learners with an opportunity not only to bring together their core and disciplinary knowledge to acquire major skills of learning english as a foreign language (efl), and the intellectual challenge of these issues at the interface of media, language and religion, but also help the materials generators to produce suitable types of content to be delivered through the...

background to prevent diseases transmission, infection control in dental offices without reducing the accuracy and dimensional stability of impression materials is very important. objectives the aim of this study was to evaluate the effects of sanosil disinfectants on the dimensional stability of some usual impression materials. materials and methods three types of impression material, namely, ...

background: radon, thoron and their progenies are the most important contributions to human exposure from natural sources. radon exists in soil gas, building materials, indoor atmosphere etc. among all the natural sources of radiation dose to human beings, inhalation of radon contributes a lot. the work presented here emphasizes the long term measurements of radon, thoron and their progeny conc...

crabs of intertidal zone of a muddy shore in bandar abbas were studied using monthly examination of goharshad and terminal stations during august 2005 to july 2006. sampling was done by corer and 14 species from 6 families were identified. crabs were from ocypodidae, pinnotheridae, pilumnidae, trapeziidae, leucosiidae and varunidae families. results showed ocypodidae, the most abundant and dive...