300 dpi: (k7452-5.jpg)
640 pixels wide: (k7552-5.jpg)
 Image Number K7452-5 |
Infrared video thermography showed that a drop of pure (deionized) water placed on the right lobe of this bean leaf froze more than 2 minutes later than the leaf. A droplet of ice-nucleating bacteria put on the left lobe was the first to freeze, inducing ice nucleation throughout the leaf.
Photo by Keith Weller
