Word: plasma
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Dates: during 1930-1939
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...powder is a "globulin," a protein substance derived from the plasma of the beef blood; plasma is the fluid portion of the blood from which the red and white cells have been removed...
After a day or two of observation to insure that the cultures are alive and not contaminated, they are transferred to new medium containing serum and plasma derived from the intended recipient of the graft. On this medium they are grown for a period of two to four weeks, being transferred to fresh medium as often as seems desirable...