ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06
5pBV3. Macromolecular absorption: The roles of molecular size, structure,
solvation, and solute interactions.
Frederick W. Kremkau
Ctr. for Med. Ultrasound, Bowman Gray School of Medicine, Wake Forest
Univ., Winston-Salem, NC 27157-1039
Attenuation of ultrasound in tissues is due primarily to macromolecular
absorption. Biomacromolecules have higher absorptions than the constituent
molecules of which they are made [F. W. Kremkau and W. Cowgill,
1330--1335 (1984)]. Absorption dependencies on structure [F. W Kremkau and R. W
Cowgill, 1217--1221 (1985)] and solvation [F. W. Kremkau,
2410--2415 (1988)] are probably interrelated. Underlying absorption processes
are enhanced or new processes are added under conditions of high concentration,
aggregation, or cross linking [F. W. Kremkau et al., 1448--1451
(1973)].