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"Researchers design a simple filter by peeling the bark off a small section of white pine, then inserting and securing it within plastic tubing." ![]() "An electron microscope image showing E. coli bacteria (green) trapped over xylem pit membranes (red and blue) in the sapwood after filtration." ![]() http://www.boston.com/news/science/blogs/science-in-mind/2014/03/05/mit-engineers-test-low-tech-water-filter-inspired-nature/NSCr2KcepwV238vb7TjT6N/blog.html |
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