mean ( and sd ) concentrations of adenosine triphosphate ( atp ) , phosphocreatine , and inorganic phosphate ( pi ) measured in the brains of 15 normal adult human volunteers with a 1.5-t nmr system were 3.03 ( 0.49 ) , 5.18 ( 0.89 ) , and 1.5 ( 0.7 ) mmol per liter of wet tissue , respectively .
C0086045
concentrations
C0006104
brains