Gillnets are sometimes abandoned or lost at sea due to sea storms, tearing by a hard object, or the failure of fishermen to find the fishing area. In this study, the data related to the frequency of illegal abandoned fishing nets in Golestan province were collected through field patrols and questionnaire information from spring to winter 2016. 88,465 abandoned fishing nets were collected in the...

a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...

Introduction: Achieving the organization goals depend on management and effective leadership styles. This is true in all organizations including academic centers. This study aimed to investigate leadership effectiveness and styles among the middle level managers of Isfahan University of Medical Science. Methods: This descriptive study was conducted on all middle level managers (head or deputy ...

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

even though, to date, a lot of studies have been conducted on the subject of politeness theory, there are very few studies regarding the applicability of this theory to translation between english and persian which shows the reason behind conducting the present study. this study was carried out with the aim of highlighting whether there is any difference between english and persian methods of u...

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...