Before revision: By the time of the survey's ultimate conclusion in February 1974 the chemical resources contained in approximately 2,500 Australian species of plant and 2,250 from Papua New Guinea had been investigated with several hundred new alkaloids being isolated and identified along with publication of close to 2,000 research papers on plant constituents by Australian chemist
After revision: By the time of the survey's ultimate conclusion in February 1974 the chemical resources contained in approximately 2,500 Australian species of plant and 2,250 from Papua New Guinea had been investigated with several hundred new alkaloids being isolated and identified along with publication of close to 2,000 research papers on plant constituents by Australian chemists.