The use of filter aids and precoat filtration is ubiquitous in a wide number of industries, including chemicals, food processing, pharmaceuticals, mining, municipal (potable) water treatment and waste treatment. World Minerals Inc., the parent company of Celite and Harborlite, and other organizations have recently made major advances in filter aid technology. These advances have now pushed the ...

OBJECTIVE To evaluate the potential for confounding from asbestos exposure, primarily chrysotile, on the relation between crystalline silica and mortality from lung cancer among diatomaceous earth (diatomite) workers. METHODS A reanalysis of a cohort mortality study of diatomite workers was performed to take into account quantitative estimates of asbestos exposure. The reanalysis was limited ...

After 1991, the Caucasus republics, became a special focus of foreign policy Iran. Relations with IRI were important for Armenia also. needed Iran ensuring its energy security. Iran, rich in hydrocarbon resources, has also shown interest South as one regional actors, seeing region new market exports. The article examines factors influencing establishment cooperation between and main directions ...

BACKGROUND The aim of this study was to estimate the frequency and rate of the first 50 common types of invasive procedures in Iran. METHODS Data about the number of all invasive procedures and each type of procedure that were conducted in Iran in 2010 were collected using the main insurance organizations database. These numbers were sorted in an excel database, and the first 50 invasive proc...

BACKGROUND Cutaneous leishmaniasis due to Leishmania major has become a hot topic in Iran. The objective of this study was to determine some ecological aspects of sand flies in the study area. METHODS Sand flies were collected biweekly from indoors and outdoors fixed places in the selected villages, using 30 sticky paper traps from the beginning to the end of the active season of 2006 in Kerm...