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 ...

saluk mount is selected for devonian biostratigraphy. this area located at southwest of bojnurd. in this study three sections are selected and two sections, chahar-borj and tabar sections with a thickness of 650 m, which consist mainly of calcareous sediments was studied in detailed but third section, qelli section, with a thickness of about 450m which consist mainly of sandstone and evaporates...

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

هدف از مطالعه حاضر، بررسی رابطه ی بین دانش تغذیه و سطح فعالیت بدنی با عوامل خطرزای قلبی عروقی در مردان مبتلا به انفارکتوس قلبی می باشد. بدین منظور 150 مرد مبتلا به انفارکتوس قلبی با میانگین (سن 3/58 ±58/01 سال، قد 6/43±174/24 سانتی متر، وزن 13/18±80/80 کیلوگرم، درصد چربی بدن 3/92 ±25/76 درصد و شاخص توده بدنی 1/60±22/55 کیلوگرم بر متر مربع) بر اساس جدول مورگان انتخاب و وارد مطالعه شدند. پس از تو...

this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...

چکیده: در این رساله، ابتدا مفهوم *c-جبر را بیان می کنیم سپس با تجزیه و تحلیل دقیق مقاله های زیر grüss type inequalities in inner product modules,2005 schwarz and grüss type inequalities for c*- seminorms and positive linear functionals on banach *- modules,2011 ابتدا مفهوم *h-جبرها را بیان کرده و سپس بعضی از ویژگی های یک ضرب داخلی تعمیم یافته در مدولها روی *h-جبرها و *c-جبرهارابیان می کنیم ...

this study investigated how group formation method, namely student-selected vs. teacher-assigned, influences the results of the community model of teaching creative writing; i.e., group dynamics and group outcome (the quality of performance). the study adopted an experimental comparison group and microgenetic research design to observe the change process over a relatively short period of time. ...