Features over 200 entries on medical and dental inventions and discoveries that have had a great impact on health throughout the world from fluoride treatments to AIDS therapies as well as the people responsible for them. Written in nontechnical language, Medical Discoveries explores medical practices such as acupuncture, significant developments in research such as chemotherapy, and instrumentation such as X-ray machines that have .

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Sunday, May 26, 2013. Also, hooray for SUMMER! I just finished my fifth and most difficult year yet. Anyway, enjoy these 2 spring crafts my students enjoyed. Thursday, February 21, 2013. Saturday, January 5, 2013. Wednesday, January 2, 2013. Saturday, November 17, 2012.

Friday, March 27, 2009. To some extent it was a matter of chance but progress in analytical chemistry also contributed to the discovery of tungsten. For a long time tellurium was regarded as metal. In 18932 Berzelius showed its great similarity with selenium and sulphur and tellurium was once and forever classified ad a non-metal. Preparing metallic zirconium turned ou.