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Scientists isolated morphine from opium, leading to the belief (in the West at least) that a single, non-living compound in a plant was responsible for its healing properties. This helped create the biomedical model of pharmacotherapy, where plants are se
H. Silva, V. Bonato, C. Silva, and R. Santos. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
A. Simoes, and E. Costa. Proceedings of the Genetic and Evolutionary
Computation Conference, 1, page 612--619. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)