Sentences with phrase «trace metals such»

Stüeken has begun a UW postdoctoral position funded by NASA to look at trace metals such as zinc, copper and cobalt to see if one of them controlled the growth of ancient life.

Not exact matches

In addition to its importance in the water cycle, as a potentially exploitable water resource and a source of water for brackish coastal environments such as marshes and coastal lagoons, it also can serve as an important source of dissolved chemical compounds such as nutrients and trace and toxic metals.

The artificial seawater media consists of about 60 ingredients that include chemical elements such as calcium, sodium, magnesium plus organic and inorganic nitrogen, carbon, trace metals and B vitamins.

Unlike most rocks on Earth, they contained almost no traces of common mineral - forming metals such as calcium, magnesium and iron.

Now, however, scientists are looking into taking that waste and harvesting its trace amounts of metals such as gold, silver and platinum.

X-ray fluorescence imaging can be used to detect trace levels of heavy elements such as metals (but not carbon).

• Safe: free of disease - causing microorganisms (bacteria, viruses, spores); heavy metals; chemicals from industry and agriculture; pharmaceuticals; disinfectants and related by - products; radioactivity; and synthetic fluoride; • Fresh: neither salty nor stagnant; • Clean: physically, biologically and chemically; • Natural: coming from a pristine mountain stream, glacial river or fresh spring; • Hydrating: water with low surface tension and thus better hydrating; • Mineral balanced: contains a wide variety of minerals including trace minerals, excellent ionic activity (Total Dissolved Solids ~ 300 ppm), including cations such as calcium, magnesium, potassium and sodium; and anions such as nitrate, chloride, bicarbonate, sulfate and carbonate.

Specifically, certain shakes have tested positive for traces of steroids and heavy metals such as lead, arsenic, cadmium and mercury.

Without enough trace minerals, you're also susceptible to contamination from heavy metals such as arsenic, mercury and lead.

Such «complete» vitamin - mineral supplements may be preferable to conventional supplements in which only purified metal salts are used as the sources of minerals and trace elements.

The wastewater flushed from the coal - fired plants into rivers and lakes typically contains traces of such highly toxic heavy metals as lead, arsenic, mercury and selenium.

Researchers from Melbourne Monash University and the CSIRO also found traces of heavy metals such as cadmium.

Operate standard security equipment such as X-ray machines, hand wands, metal - detector screening, and explosive trace detection during or after screening checkpoints