. Currents in biochemical research, 1956; twenty-seven essays charting the present course of biochemical research and considering the intimate relationship of biochemistry to medicine, physiology, and biology. Biochemistry -- Research. PHILIP GEORGE Since the formation of both oxymyoglobin and oxyhemoglobin are highly exothermic, about 16 and 14 , respectively, this has the effect of enhancing the resistance toward oxidation through an increase in the endothermicity of the over-all electron transfer by these large amounts. The coexistence of the two reaction pathsâcombination to form
. Currents in biochemical research, 1956; twenty-seven essays charting the present course of biochemical research and considering the intimate relationship of biochemistry to medicine, physiology, and biology. Biochemistry -- Research. PHILIP GEORGE Since the formation of both oxymyoglobin and oxyhemoglobin are highly exothermic, about 16 and 14 , respectively, this has the effect of enhancing the resistance toward oxidation through an increase in the endothermicity of the over-all electron transfer by these large amounts. The coexistence of the two reaction pathsâcombination to form the stable oxygen complex and electron transfer giving irreversible oxidationâis an uncommon feature in chemical 40 o E t)b30 O m20 c V â ^ 10 o D Fe;^+Or 20 AFeâ^*+0, 16 , Ironâoxygen distance Fig. 4. Schematic potential energy diagram for the reaction of oxygen with ferromyoglobin, giving Oi" and ferrimyoglobin (25). kinetics, and the detailed mechanism can be envisaged with the help of the schematic potential energy diagram given in Figure 4. The positions of state A (FCp"^ + O2 infinitely separated) and state B (Fep"^02, the oxygen complex) are defined by the heat of formation of the oxygen complex, and that of state D (Fcp"^ + O2", infinitely separated) by the calculation employing the ionization potential and other thermochemical data referred to above. State C, in which an electron has been transferred within the complex, Fep"*"02~, but separation of the products has not yet occurred, has been placed 20 above state 368. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Green, David Ezra, 1910-. New York, Interscience Publishers
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