金沙官网手机版

A taste for poison

作者:夏侯戡    发布时间:2019-02-27 05:10:07    

By Barry Fox Ferns can soak up poisonous arsenic from contaminated soil for as long as it takes to clear a site, say researchers at the University of Florida. In W0 0061822, they reveal that the Chinese ladder brake fern, Pteris vittata, grows very rapidly, obligingly collecting poison in its stems and roots where it is easy to harvest. The researchers have found that arsenic concentrations can exceed 5 grams in each kilogram of dried plant. Natural arsenic deposits are a major health hazard in Bangladesh and West Bengal,

 

Copyright © 网站地图