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تعداد نتایج: 5309747 فیلتر نتایج به سال:
abstract mercury compounds are widely used in several industries. such compounds can find their way to the environment causing its pollution. mercury is considered as a powerful carcinogenic agent. on the other side, the garlic extract is characterized by having compounds of specific anticarcinogenic action. therefore, the present study was conducted to investigate both the genotoxicity and cyt...
Dysgraphia is one of the common symptoms of specific learning disorders. children with dysgraphia have several cognitive problems. This research was conducted with the aim of investigating the effectiveness of HAMRAH cognitive rehabilitation package on improving executive functions (working memory and response inhibition) in children with dysgraphia. The present research was semi-experimental i...
in this study fertilizing potential of municipal solid waste (msw) compost was investigated by the distribution behavior of heavy metals, nutrient elements and salinity content among the different size fractions. therefore, 3 compost samples (each composed of 6 subsamples) were collected from sanandaj msw composting plant. then, the samples were physically divided into seven fractions of differ...
abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...
in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...
To improve the calculation of the flow properties of an aerospike nozzle, different turbulence models were investigated in this study. The primary shape of the nozzle plug is determined through utilizing an approximate method. The flow field is, then, simulated using the Navier-Stokes equations for compressible flows. The commercial computational fluid dynamics code Fluent is used to simulate t...
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