Blue LEDs Unlock Revolutionary Technique (image) Princeton University Share Print E-Mail Caption A blue LED shines on a vial containing heavy water, a pharmaceutical compound, and a light-activated catalyst. The new photocatalytic approach from Princeton's David MacMillan turns a multi-month process into a one-day step, speeding the arrival of new drugs to the marketplace. Credit David MacMillan/Princeton University Usage Restrictions Editorial use only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.