Better prostate cancer test

April 7, 2017April 27, 2007 by Brian Wang

A far more accurate blood test for prostate cancer has been created The American Cancer Society projects that in 2007 there will be 219,000 new cases and 27,000 deaths. Yet detecting the disease early has always been problematic. The new tests accuracy: about 3 percent of the time, when the test was positive, there was …

Nanoscale power generator improved over a thousand fold

April 7, 2017April 5, 2007 by Brian Wang

About a year ago, Zhong Lin Wang of Georgia Tech in the US discovered that, when he disturbed zinc oxide nanowires, they gave off a tiny electrical current, a phenomenon called piezoelectricity. At the time, he had to use the tip of an atomic force microscope – a $250,000 instrument – to create about one-billionth …