determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...

abstract the present study was conducted to investigate the effectiveness of a rather newly developed method in language teaching that is the use of paragraph reading task and whole reading task and their effects on improving efl learner’s speaking ability. to fulfill the purpose of the study, first 90 participants studying their course at sa eedi high school in tehran were chosen by means of ...

Background: Decontamination is a process that infectious organisms are removed by physical and chemical methods. The advantages and disadvantages of each of these values can lead to a clear viewpoint of an appropriate sterilization process. The aim of this study was to investigate the effectiveness of 70% alcohol, Deconex (SOLARSEPT) and H2O2, also the additive effect of supplemental UV light o...

abstract this study aimed at investigating the translation of interjections from english into persian in dubbing. to carry out this study the expressive secondary interjections found in the film four weddings and a funeral and their equivalent in persian dubbed version were analyzed through the strategies proposed by cuenca. the descriptive analysis of the corpus showed that (strategy b) i.e...

objective: the objective of this study was to investigate the invitro fluoride release of four new self-adhesive resin cements; set (sdi, australia), breeze (pentron, usa), embrace wetbond (pulpdent, usa), g-cem (gc, japan) and to assess the bonding performance of these self-adhesive resin cements for bonding of orthodontic brackets. materials and methods: for fluoride release experiment, six ...

By using cathodic plasma electrolysis, a thin film of diamond-like carbon and carbyne was produced on the  nickel surface. The ethanolic solution at different concentrations of 15, 30 and 50 vol% was used as the  electrolyte; the  produced carbon film was studied by using glow discharge optical emission spectroscopy, scanning electron microscopy, optical profilometer,  and s...