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11 Apr 2007 A team of researchers led by professor Hideo Hosono of the Tokyo Institute of Technology has developed a new type of alumina cement that conducts electricity like metal by altering the crystal structure at the nano level. Ordinary alumina cement made from a lime-alumina compound (C12A7) has a crystal structure consisting of asymmetric cages, making it a poor conductor of electricity. But by sealing the alumina cement compound along with titanium inside a glass tube and heating it to 1,100 degrees Celsius, the researchers were able to create a homogenized, symmetrical cage structure that conducts electricity like metal. Results indicate the cement's electrical conductivity is on par with that of manganese at room temperature. Moreover, like other metals, the cement's conductivity increases as its temperature decreases.
New cement conducts electricity like metal ~ Pink Tentacle - StumbleUpon
Natural Pools or Natural Swimming Ponds (NSPs) Let nature clean the water... Chemical-free water garden and swimming pool. The plant portion, or regeneration zone, is separated from the swimming area by the wall seen a few inches below the water’s surface. www.naturalswimmingpools.com The pools have skimmers and pumps that circulate the water through the regeneration zone and back into the swimming area. The aquatic plants filter out contaminants and use nutrients from the water as food which helps prevent algae.
Natural Pools or Swimming Ponds - StumbleUpon
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