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1 - Environmental
2 - Polyfluoroalkyl chemicals (PFCs)—including perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), perfluorooctane sulfonic acid (PFOS), and perfluorohexane sulfonic acid (PFHxS)—are synthetic compounds that bind to proteins in the liver and serum, and are consistently detected in human serum samples. Epidemiologic studies have reported positive associations between serum PFCs and serum cholesterol levels in humans, but many have included highly exposed populations, and few have evaluated potential effects of PFNA and PFHxS. Nelson et al. (analyzed serum concentrations of PFOA, PFOS, PFNA, and PFHxS in association with serum
3 - Environmental Expert is a global environmental industry marketplace and information resouce
4 - criteria pollutants, volatile organic compounds,governmental agencies, private laboratories, and industrial facilities around the world.
Acoustics, Asbestos, Chemical Safety, Compliance, Consulting,
Containment, Decontamination, Emergency, Fire Safety, Hazardous Materials
Anthropogenic sources (human activity)
related to burning different kinds of fuel.
Cancer Related Questions Go
Smog, Air Quality and Acid Rain
Standards for CEM and Stack Gas Monitoring
Benzene exposure linked to sperm abnormalities that cause birth defects.
Pesticide exposure, family history raise risk of prostate cancer.
The estimated cost of environmental damage by 3,000 of the world's biggest companies is about $2.2 trillion in 2008,
Global warming, or the 'greenhouse effect' is an environmental issue that deals with the potential for global climate change due to increased levels of atmospheric 'greenhouse gases'
The principle greenhouse gases include water vapor, carbon dioxide, methane, nitrogen oxides, and some engineered chemicals such as cholorofluorocarbons. While most of these gases occur in the atmosphere naturally, levels have been increasing due to the widespread burning of fossil fuels by growing human populations.
Descriptors : (*SOLID ROCKET PROPELLANTS, *IGNITION), (*COMPOSITE PROPELLANTS, IGNITION), AMMONIUM PERCHLORATE, PRESSURE, GASES, AIR, OXYGEN, NITROGEN, METHANE, HELIUM, IGNITION SYSTEMS, SURFACE
PROPERTIES, ELECTRIC ARCSthe mixtures containing halocarbons (CHF3 or CClF3) and nitrogen have been investigated.The values for two-body processes (5 × 10-14 cm3 molecule-1 s-1 −CHF3 and 1.3 × 10-13 cm3 molecule-1 s-1 −CClF3) are fully consistent with the literature data. The estimated rate constants for electron capture by van der Waals complexes are equal to 1.2 × 10-10 and 2.4 × 10-11 cm3 molecule-1 s-1 for CHF3·N2 and CClF3·N2, respectively.
Fatigue crack growth tests were performed on titanium in vacuum, a nitrogen gas, inert gases (helium and argon), and air. Fracture surface morphologies