EST is the Eastern standard time and is 5 hours behind the GMT. EST = GMT/UTC -5. EDT and EST are parts of the Eastern Time Zone that is observed in 17 states of the country lying in the eastern region. In the northern parts of this time zone, clocks are turned back by an hour during spring to save daylight.
Prince Klemens von Metternich (1773-1859), Austrian politician and diplomat, suppressed nationalistic and democratic trends in Central Europe but was also the architect of a diplomatic system which kept Europe at peace for a century.
1907 Hektoen suggests that the safety of transfusion might be improved by crossmatching blood between donors and patients to exclude incompatible mixtures. Reuben Ottenberg performs the first blood transfusion using blood typing and crossmatching in New York. Ottenberg also observed the mendelian inheritance of blood groups and recognized the âuniversalâ utility of group O donors.