نتایج جستجو برای: environmental pollutants

تعداد نتایج: 387832  

2014
Anilava Kaviraj Erhan Unlu Abhik Gupta Ahmed El Nemr

Thousands of pollutants enter daily into environment and exert various kinds of stress on organisms and ecosystems. Risk assessment of these pollutants to organisms and ecosystems is challenging because of diversities in chemical nature and mode of toxicity of the pollutants as well as variation in sensitivities of the organisms exposed to the pollutants. Even low, relatively innocuous concentr...

2014
Akhtar Hayat Jean L. Marty

Environmental contaminants monitoring is one of the key issues in understanding and managing hazards to human health and ecosystems. In this context, aptamer based electrochemical sensors have achieved intense significance because of their capability to resolve a potentially large number of problems and challenges in environmental contamination. An aptasensor is a compact analytical device inco...

2009
Ronald H. White Ila Cote Lauren Zeise Mary Fox Francesca Dominici Thomas A. Burke Paul D. White Dale B. Hattis Jonathan M. Samet

Low-dose extrapolation model selection for evaluating the health effects of environmental pollutants is a key component of the risk assessment process. At a workshop held in Baltimore, Maryland, on 23-24 April 2007, sponsored by U.S. Environmental Protection Agency and Johns Hopkins Risk Sciences and Public Policy Institute, a multidisciplinary group of experts reviewed the state of the science...

2013
Chunlei Kong Lijuan Wang Pengpeng Li Yuanyuan Qu Hongzhi Tang Jingwei Wang Hao Zhou Qiao Ma Jiti Zhou Ping Xu

Dyella ginsengisoli strain LA-4 can efficiently degrade environmental pollutants such as biphenyl and azo dyes. Here, we present a 4.55-Mb draft genome sequence of strain LA-4, which may provide further insights into the molecular mechanism in environmental pollution remediation.

The concentrations of cadmium, copper, nickel, zinc and lead were investigated in various components of smooth-leaved elm (Ulmus carpinifolia) tree in three sites (polluted, moderately polluted, and control) in Abadeh, Iran, in July 2015. The experiment was conducted using factorial experiment in a Completely Randomized Design with three replications. The concentration of heavy metals was measu...

Journal: :Journal of the Air & Waste Management Association 1991
D F Naugle T K Pierson

Risk characterization is defined by both the U.S. National Academy of Sciences and the U.S. EPA as the estimation of human health risk due to harmful (i.e., toxic or carcinogenic) substances or organisms. Risk characterization studies are accomplished by integrating quantitative exposure estimates and dose-response relationships with the qualitative results of hazard identification. A Risk Char...

Journal: :Korean Journal of Environmental Health Sciences 2009

2011
Simões

When attached to surfaces, aggregated microorganisms (predominantly bacteria) and their extracellular polymeric substances are commonly known as biofilms. They are ubiquitous in nature and its formation is part of a strategy that bacteria use in order to survive in hostile environments. Although biofilms play crucial roles in many processes (biodegradation of environmental pollutants or the mic...

2012
L. Mark Risse

Agriculture is one of several industries that face criticism today because of its impact on the environment. Pollution prevention technologies can go a long way toward addressing these concerns. They could also be beneficial to producers as they represent a move toward efficiency. The most common environmental pollutants from crop production are sediment, nutrients, and pesticides. This paper i...

Journal: :MEDICC review 2016
Silvia J Venero-Fernández

WHO considers the effects of air pollution one of the most pressing global health priorities. Several years ago, scientists began noting a link between Saharan dust (a meteorological phenomenon that diminishes air quality as it spreads over the globe) and some diseases, but the few studies to date have been inconsistent. Cuba has the human and material resources to study the association between...

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