A microscopic tube of carbon atoms lying across a pair of metal electrodes can operate as a simple transistor at room temperature. Room-temperature transistor based on a single carbon nanotube. One-way molecules channel electric current . Putting the squeeze on grapefruit juice Scientists have identified the compound in grapefruit juice that may increase the potency of many drugs. Inactivation of cytochrome P450 3A4 by bergamottin, a component of grapefruit juice.
Grapefruit juice gives drug an added punch.
Lown, K.S., D.G. Balley, et al. Grapefruit juice increases felodipine oral availability in humans by decreasing intestinal CYP3A protein expression. Raloff, J. 1997. Deciphering the grapefruit juice effect. Tiger salamanders that eat members of their own species provide the first laboratory demonstration that an increased risk of disease limits the evolution of cannibalism.