there are enormous quantities of unknown composition of hazardous wastes in tehran without any control, safe disposal and treatment. this study was done to identify hazardous wastes and to control this wastes by establishing a treatment, storage and disposal facility. according to available statistics there are 4461 different industries in tehran, out of which sample were chosen each having ove...

BACKGROUND Hip fracture has a high mortality rate, but the actual level of long-term excess mortality and its impact on population-wide mortality remains controversial. The present prospective study investigated short- and long-term excess mortality after hip fractures with adjustment of other risk factors. We calculated the population attributable risk proportion (PARP) to assess the impact of...

BACKGROUND It is not known how the relationship between weight change and mortality is influenced by initial body mass index (BMI) or the magnitude of weight change. METHODS We use the nationally representative Health and Retirement Study (n = 13,104; follow-up 1992-2006) and Cox regression analysis to estimate relative mortality risks for 2-year weight change by initial BMI among 50- to-70-y...

natural hazards are among destructive agents that annually take thousands of lives and impose devastating damages in iran. spotting such a high risk areas can help reducing the amount of their probable risk. a 1:500000 liquefaction and landslide hazard zonation map developed for the southern shoreline of the caspian sea. this geotechnical hazard map divides the study area to 15 hazard classes (...

Samples of frozen serum of human or bovine origin have been used as an additional standard for blood acid-base analysis. The serum was used to check and compare the performance of two pH electrodes and microequilibration systems. A mean buffer line for the serum was determined at the start of the series. Daily estimations of base excess and standard bicarbonate were made. When any analysis was ...

Excess functions ........................................................................................................................................ 1 Mathematical explanation ..................................................................................................................... 1 Physical example: Molar volume of a pure substance ................................................

The article presents the content determining results of heavy metals and arsenic in sod-podzolic soils school grounds Vladimir, Vladimir region. According to accumulation indicator, intensity these areas has been determined, which is decreasing series Pb→As→Cu→Zn→Ni. calculation pollutants hazard coefficient showed that their MPC excess decreases As→Zn→Pb→Cu→Ni. soil pollution level assessed fo...

background: tea is the most popular nonalcoholic beverage worldwide. in recent years, some iranian studies have shown the occurrence of toxic elements in fresh or dried tealeaves as well as in brewed tea. the present study aimed to ascertain the health risks associated with exposure to toxic and essential element through black tea consumption in iran by systematically reviewing the accredited a...

the present study was conducted to determine peak ground acceleration (pga) over bedrock in probabilistic analysis methods for the seismic hazard and uniform hazard spectra at different hazard levels for esfahan city. a series of statistics containing historical and instrumental seismic data covering from the 8th century a.d. to the now up to a radius of 200 km was employed and seismic sources ...