Sweaty fingers make tidy prints. Beads of perspiration seeping from a person’s pores can leave detailed maps of the fingertips, and a new technique can detect the sweat.
Human finger pores ooze salty drops of water about the size of pinpricks, says materials scientist Jong-Man Kim of Hanyang University in Seoul, South Korea.
He and colleagues ...
In the quest to wring energy from every source imaginable, scientists are putting the squeeze on a common plastic ingredient. Applying force to polymers in water generates enough energy to drive chemical reactions, a team reports online March 1 in Angewandte Chemie.