نتایج جستجو برای: determination of chemicals
تعداد نتایج: 21173121 فیلتر نتایج به سال:
Correspondence address: Assoc. Prof. Miloň Tichý, DSc. National Institute of Public Health Šrobárova 48, 100 42 Praha, Czech Republic, e-mail: [email protected] Committee accepted the program of chemical safety in October 2003 called REACH, meaning “Registration, Evaluation, Authorization of Chemicals”. The protection of health of nature, including human beings, against harmful effects of chemicals...
food safety is considered as an important world concern. the detection of pathogen and toxic materials in food has an important role in public health care. in recent years, the applications of microbial biosensor have been developed as a new approach for toxicity control. luminescent microbial biosensor is an appropriate biological tool for protection of natural environment. this type of biosen...
آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
Today, use of medicinal plants is important for control of the disease-causing agents, including parasites, rather than chemicals. This study was conducted to evaluate the efficacy and effective dose of Zataria multiflora hydroalcoholic extract in the fight against external protozoan parasite (Trichodina). For this purpose, after determination of the lethal concentrations (LC50) of t...
Background and aims: Chemical materials are very useful in our lives. Laboratory technicians expose to different chemicals. Long term repeated exposures to hazardous chemicalsmay lead to chronic effects. In this research the risk of occupational exposure to hazardous chemicals in laboratories of educational and therapeutic centers of Qom University of medical sciences were assessed. Methods...
Over the years, environment and the human population have seen an increasing exposure to both existing and newly developed chemicals. It is generally accepted that at least some of those are toxic, albeit as pure compound or in combination with others. In response to a growing public awareness and scientific data, the new European chemicals legislation (Registration, Evaluation and Authorizatio...
Treated sea water is the most significant source of water and surfactant floods. The various chemicals employed in treatment plants should be compatible with surfactant systems. Based on surface tension experiments, the activity of these chemicals is examined over a wide range of concentrations in different solutions, including distillated water, sea water by using three types of surfactant mix...
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