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> > So the pairing of theoretical compartment times with actual tissues is > bad science? I can understand it, but it would seem to violate > the entire notion of 'scar tissue' having a longer half time. How do I > reconcile this? 1/2 times are most closely associated with blood flow (perfusion); the more flow, the shorter the 1/2 time of the "tissue" because the gas washes in/out faster by diffusing (a short distance~few cells) from/to the circulation. if dissolved gas needs to travel long distances (by diffusion only--no perfusion), then it will take a long time to get in or out of tissues. i'm not sure that you want to call this a long "1/2 time," as the gas transport now has spatial dependence in addition to the usual exponential rate eqs. em _____________________________________________________________.sig Eric Maiken email: eapg243@ea*.oa*.uc*.ed* Dept. of Physics o: 714 824-6621 U of California fax: 714 824 2175 Irvine, CA 92715-4575
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