abstract textbooks play an important role in english language teaching (elt), particularly in the english as a foreign language (efl) context where it provides the primary linguistic input. the present research was an attempt to comparatively evaluate the touchstone series in terms of compliment and complaint speech acts. four touchstone textbooks (book 1, book 2, book 3, and book 4) were selec...

ginger waste material (gwm) has been utilized as adsorbent for removal of hazardouspatent blue vf (pbvf) dye from aqueous solution. batch adsorption experiments wereperformed as a function of ph, contact time, dye concentration, adsorbent dose and temperature.the optimum ph required for the maximum adsorption was found to be 2. the experimentalequilibrium adsorption data were tested using langm...

according to the reports of who, stability of rev.1 vaccine should take more than one year, while the expiring date for the vaccine produced in iran is 3 to 4 months, therefore any attempt to elongate the stability of this vaccine can solve many problems of the production including the request of veterinary organization of iran in this regard. the objective of this study was to increase the sta...

introduction : furcal perforations are one of the most challenging causes of endodontic failures. several materials including mta have been used for non surgical repair of these perforations. the aim of this study was to compare treatment outcome of furcal perforation treatment in primary molars using root mta and proroot mta. materials and methods: this in vitro study was conducted on 54 prima...

introduction: to examine the long-term effects of normal saline and a synthetic tissue fluid (phosphate buffered saline, pbs) on mineral trioxide aggregate (mta). materials and methods: root-ends of twelve extracted human teeth were resected; root-end cavities were prepared and filled with mta. samples were randomly divided into two groups of six each. teeth in group i were placed in normal sal...

background: manual material handling is one of the major health and safety hazards in industry. this study aims to assess the lifting tasks, before and after intervention using niosh lifting equation and manual handling assessment charts (mac). methods: this interventional study was performed in 2011 in a tile manufacturing industry in hamadan, located in the west of iran. the prevalence of mus...

mucoadhesive polymers that bind to the gastric mucin or epithelial cell surface are useful in drug delivery for the purpose of increasing the intimacy and duration of contact of drug with the absorbing membrane. several synthetic polymers are in use for this purpose. since the biodegradability of the synthetic polymers are questionable, in this investigation, an oral mucoadhesive controlled del...

background & aims of the study: petrochemical industry is an important industry in the economic development of the country that causes employees have exposure with several kinds of contamination. the aim of this study was semi-quantitative assessment of the health risk of occupational exposure to chemical materials and investigation of spirometry indices between employees of petrochemical indus...