Shaken or stirred, it’s all purified
By Mary Beth Griggs
Clean, drinkable water is unfortunately out of reach for hundreds of millions of people around the world, contributing to a vicious cycle of poverty and disease. People who have to spend large amounts of time finding safe water to drink don’t have time for other things like education or work, and contaminated water often harbors deadly diseases. But there is hope, in the form of nanotech filters, light-based water purifiers, and an ancient Egyptian seed.
In ancient Egypt, people used the crushed seeds of the Moringa oleifera tree to clear up cloudy water. Scientists later discovered that a protein in the seeds kills bacteria by gathering them into clusters which sink to the bottom of the container.
In a recent paper in Langmuir, researchers at Penn State announced that they’d solved a piece of the puzzle: how the protein kills the bacteria. It seems to fuse the membranes of the bacteria together. Membranes are designed to protect a cell, so when those defenses are breached, it’s bad news for the bacteria.