Zinc based alloys have recently attracted great attention as promising biodegradable metals. Zinc exhibits moderate degradation rates in biological fluid and the zinc releases during the degradation process is considered safe to human systems. However, these materials exhibit critical limitations in terms of mechanical properties for medical applications. Adding alloying elements as well as gra...

lead (pb) is one of the most hazardous heavy metal that caused serious problems for ecosystem at recent years. in this study, the effect of pb on seed germination, incipient growth and antioxidant enzymes of six common used turfgrasses was investigated. the results showed that after implementation of different concentrations (0, 1000, 2000 and 3000 µm) of pb, agropyron elongatum exhibited the h...

the potential indoor air impacts of burning candles have drawn increased attention in recent years.  burning paraffin waxes itself, regardless to wick and the essence, produce some allergens and even carcinogenic compounds. further biorefining of petroleum paraffin wax with proper bacteria is one of the proposed resolutions to decrease the health threat. therefore in this study iranian heavy cr...

abstract climate change and increase the temperature of the environmental importance of human behavior that is considered in recent years many studies have been devoted .objective of this study is to investigate trend and slope trend monthly of hdd with temperature threshold of 18. mean daily temperature of weather during the statistical period of 44 years (1962-2005) was provided from asfe zar...

there are two approaches regarding environmental changes. one of the is ignoring them and continuing present trend in future, and the other is identifying these changes and preparing environmental management program in order to control their negative impacts and plan for the improvement of environmental condition. anzali international wetland is one of the protected wetlands in iran which is in...

the environmental kuznets curve (ekc) hypothesis posits an inverted u relationship between environmental pollutants and per capita income. recent researches have examined this hypothesis for different pollutants in different countries. however, so far a few number of ekc studies have been carried out in iran. this might be due to the lack of reliable environmental data in this field. the aim of...