. "1906-11-11Z"^^ . . . "David Rittenberg"@en . "David Rittenberg (November 11, 1906 \u2013 January 24, 1970) was a U.S. biochemist who pioneered the radioactive tagging of molecules, enabling detailed studies of metabolism. These studies resulted in a change in the prevailing scientific theory, from a static, 'wear and tear' view of metabolic processes, to a dynamic theory in which constant and rapid buildup and degradation of body constituents takes place."@en . . "1906Z"^^ . "1970-01-24Z"^^ . "AmericanBiochemist" . "1970Z"^^ . . "Rittenberg, David"@en .