澳门金沙游戏平台网址:Liquid crystals could detect contaminated water


IF YOU’VE ever dropped your cellphone in water, you can now claim you were testing that water for bacterial contamination. It seems liquid crystals, ubiquitous in electronic displays, could be a great way to detect water-borne toxins. When suspended in water, the molecules in a liquid crystal form droplets in which the molecular chains line up like the lines of longitude on a globe. But in the presence of endotoxins – disease-causing molecules produced by E. coli bacteria – they rearrange to form a pattern that radiates from the drop’s centre. Previously,
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