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Aromatic proteinaceous surfactants stabilize long-lived gas microbubbles from natural sourcesThree different types of protein-specific chemical tests were performed on long-lived gas microbubbles derived from aqueous solutions of agarose powder and from filtered aqueous extracts of Hawaiian forest soil. The separate protein-specific tests involved use of either 0.3% (w/v) ninhydrin, 100 microM methylene blue dye, or 0.7-1.0 M 2-hydroxy-5-nitrobenzyl bromide. The chemical test results obtained with each of the two natural substances, i.e., agarose powder and Hawaiian forest soil, were very similar and indicate that the biological surfactants which surround and stabilize long-lived gas microbubbles are proteinaceous compounds that contain, and whose surface activity depends upon, aromatic amino acid residues, particularly tryptophan.
Document ID
19810057302
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Darrigo, J. S.
(Hawaii, University Honolulu; Cavitation-Control Technology, Kanehoe, HI, United States)
Date Acquired
August 11, 2013
Publication Date
July 15, 1981
Publication Information
Publication: Journal of Chemical Physics
Volume: 75
Subject Category
Inorganic And Physical Chemistry
Accession Number
81A41706
Funding Number(s)
CONTRACT_GRANT: NAS9-16048
Distribution Limits
Public
Copyright
Other

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