An electron spin can be compared to the needle of a compass that points either north or south. Some electrons in a full shell point up, canceling out the electromagnetic fields of an equal number of electrons that point down.
General Physics
Jan 13, 2011
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The Environmental Protection Agency has asked local US communities to test more carefully for hexavalent chromium, a probable carcinogen.
Environment
Jan 13, 2011
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The search for sustainable ways of producing energy is currently a very popular and important topic of investigation. Water adsorption/desorption is a process that can be used for the transformation of energy. Porous solids ...
Materials Science
Jan 3, 2011
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The only way to learn if your water source has hexavalent chromium is to check with your public water supplier and request a water quality report, said NJIT Professor Taha Marhaba, a civil/environmental engineer. Most municipal ...
Environment
Dec 22, 2010
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A US environmental group has found that drinking water in 35 American cities contains hexavalent chromium, a probable carcinogen, The Washington Post reported Sunday.
Environment
Dec 19, 2010
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Despite a long-held acceptance that healthy diets must incorporate chromium III, new research indicates the element has no nutritional benefit, according to a paper authored by University of Alabama researchers.
Biochemistry
Nov 22, 2010
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The metal chromium is an essential nutrient for plant and animal metabolism, but it can accumulate to toxic and hazardous levels in the environment when discharged in industrial waste water; a point made infamous by the movie ...
Environment
Oct 12, 2010
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(PhysOrg.com) -- Scientists have identified the microscopic shrapnel of a nearby star that exploded just before or during the birth of the solar system 4.5 billion years ago.
Astronomy
Sep 9, 2010
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(PhysOrg.com) -- A chain of chemical reactions between organic waste and naturally occurring chromium appears to explain the long-standing elevated levels of the chemical chromium-6, a human carcinogen, in groundwater at ...
Environment
Feb 8, 2010
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Every cook knows the ingredients for making bread: flour, water, yeast, and time. But what chemical elements are in the recipe of our universe?
Astronomy
Dec 2, 2009
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