Ultrasonic absorption in aqueous solutions of chondroitin sulfate

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Ultrasonic absorption and velocity were determined in aqueous solutions of chondroitin sulfate, the major sulfated mucopolysaccharide which is distributed throughout mammalian connective tissue, as a function of ultrasonic frequency (2.39-62.4 MHz), temperature (10•-37•C), and pH (0.85-13.3). A broad distribution of relaxation frequencies is required to describe the absorption spectra. The apparent activation energy is 3.7 kcal/mole at a concentration of 0.054 gm/cc and at neutral pH over the frequency range 8.87-50.5 MHz. It is suggested that the same absorption mechanism(s) may be responsible in aqueous solutions of chondroitin sulfate and dextran at neutral pH. The absorption peaks near pH 2.5 and 11.5 are typical of those observed for the proton-transfer mechanism.

Original languageEnglish (US)
Pages (from-to)956-958
Number of pages3
JournalJournal of the Acoustical Society of America
Issue number4
StatePublished - Apr 1975
Externally publishedYes

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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