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The U.S. Geological Survey's National Coal Resources Data System comes with an interactive map that provides a huge amount of information on the distribution, thickness, and classification of coal in the United States. The interactive map contains over 250,000 data points, each typically representing a core sample, drill hole, or driller's log in a specific location. You can use the "Filter ...
May 24, 2018 · Besides streptomycin (discovered in 1944 from Streptomyces griseus), other examples of the success of this traditional discovery research approach are chloramphenicol (1947, S. venezuelae), tetracycline (1948, S. rimosus), erythromycin (1952, Saccharopolyspora erythraea), leucomycin (1952, S. kitasatoensis), and vancomycin (1956, S. orientales).
May 8, 2012 · As dozens more antibiotics were found, many from the same family as streptomycin, the drug companies created oligopolies and reaped big profits. Pringle uses firsthand accounts and archives in the United States and Europe to reveal the intensely human story behind the discovery that started a revolution in the treatment of infectious diseases ...
Nov 7, 2023 · Description: This map shows cities, towns, villages, roads, railroads, airports, rivers, lakes, mountains and landforms in USA.
Polio infections peaked in the United States in 1952, with more than 21,000 paralytic cases. Following introduction of effective vaccines in 1955 (inactivated polio vaccine, IPV) and 1961 (oral poliovirus vaccine, OPV), polio incidence declined rapidly. The last case of wild poliovirus acquired in the United States was in 1979.
