there are more than 350 wastewater treatment plants distributed across different parts of oman. some of them produce large quantities of domestic sewage sludge, particularly this study focused on characterizing domestic sludge of six treatment plants that may contain various pollutants, therefore the proper management of domestic sewage sludge is essential.samples of domestic sewage sludge were...

background: nitrous oxide (n 2 o) is the oldest anesthetic in routine clinical use and its occupational exposure is under regulation by many countries. as studies are lacking to demonstrate the status of nitrous oxide levels in operating and recovery rooms of iranian hospitals, we aimed to study its level in teaching hospitals of tehran university of medical sciences. methods: during a 6-month ...

introduction:  all of  the  people worldwide  are exposed  to  low levels  of  radiation. cancer induction  and  genetic disorders are among the hazards of low level exposure. in some cases, radiation close to hot springs is  higher than normal areas due to a high concentration and the decay products of ra-226. given the use of hot  springs by the general public  because  of their therapeutic p...

hazardous chemicals may enter the body by inhalation, ingestion, injection or dermal absorption. these exposure routes constitute the overall exposure burden on the body. most occupational exposure studies have focused on measurement of the concentration of air-borne contaminants and other possible routes of exposure are often overlooked. several studies have already highlighted the importance ...

more than 1.5 million people live in the kathmandu valley. the valley is facing an extreme shortage of water supply. at the same time the demand is escalating rapidly. to address this issue of scarcity of water, the government of nepal has proposed a project of inter- basin transfer of water from melamchi river located 40 km north-east of the kathmandu valley. the project will cover two distric...

soils bacteria are frequently faced with various adverse environmental conditions and have developed a complex regulatory network to respond rapidly to environmental changes. in this study usefulness and applicability of stress proteins of bacteria which are produced after stress conditions were examined. the adaptation of soil bacteria involves the induction of stress proteins provide a nonspe...

most of the analyses and modeling concerning the mountain physical and human environmental changes have been based on theoretical speculation rather than scientific field observations. lack of standard observations and measurements in scattered and case specific monitoring programs offer only partially useful results for planning and management. all propositions and conclusions are hence mingle...

Malware authors have developed many techniques that allow a malicious program to change its behavior, many of which require information from the computing environment. To fully understand how malware will affect a system, all behaviors it can exhibit need to be examined, so tools are needed that can expose when malware uses information from its environment to change its behavior. This project c...