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   Earnest,

     Just read your Newsletter Mailbox answer to question about
  RGBM vs VPM.  There is quite a bit more all should know (major
  differences) -- actually the RGBM abandons the gel physics of the VPM
  as NOT applicable in toto to blood and tissue.  Consider comments:

    1)  RGBM does NOT use (VPM) gel bubbles as model for tissue and blood
        bubbles;

    2)  RGBM deduces bubble persistence time scales (how long they hang
        around) FROM seed skin structures (lipid or aqueous), not a-priori
        weeks as ASSUMED in the VPM;

    3)  RGBM bubbles are permeable to gas transfer DEPENDING on their
        skin structure always, NOT at some cutoff pressure as in the
        VPM gel studies;

    4)  biophysical equations-of-state (EOS) for lipid and aqueous
        substances relate seed pressure, temperature, diffusivities to
        gas transfer, and skin structure in the RGBM, and, as such,
        are OUTSIDE the VPM;

    5)  the RGBM transfers gas across the bubble interfaces, the VPM
        does NOT;

    6)  See new book "Technical Diving In Depth" by Wienke
        (Best) for more on same subject.

      Thanks.

      With all due respects to my friend and decreased colleague, David Yount,
  I must go on record as NOT accepting that VPM gel dynamics apply routinely
  to the body, nor the properties he studied.  Such VPM type bubble seeds
  have NEVER been found in the body -- nor outside of "gel-like" media.
  RGBM (EOS) bubbles do recover VPM bubbles in limiting circumstance of
  material strength and pressure, but that is not important to the RGBM.
  Naturally occuring bubble "seeds" in the atmosphere and oceans are
  NOT akin to VPM gel bubbles -- NOR should they be.  The body, oceans,
  and atmosphere are NOT gel.



   BW



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