If pharmacological method had not been introduced to the study of vinca rosea, the discovery of vincaleukoblastine would have been postponed by many years.
Long queues, delayed flights and overcrowding at airports have become almost as much a topic for conversation in Britain as the traditional complaining about the weather.
Older Americans are postponing retirement as they live longer. In the past few years, some were also called back to jobs when employers faced shortages of skilled labor.