Abstract
The encapsulated bacterium Acinetobacter calcoaceticus BD4 at a density of 3.6 X 10(9) cells per ml reduced the friction of turbulent water in a narrow pipe by 55%. This drag reduction was due to the tightly bound polysaccharide capsules (0.4 mg per ml) of culture. Capsule-deficient mutants of BD4 failed to reduce drag. The cell-bound polysaccharide demonstrated a threefold-higher drag-reducing activity than the polymer which was free in solution.
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- Juni E. Interspecies transformation of Acinetobacter: genetic evidence for a ubiquitous genus. J Bacteriol. 1972 Nov;112(2):917–931. doi: 10.1128/jb.112.2.917-931.1972. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kaplan N., Rosenberg E., Jann B., Jann K. Structural studies of the capsular polysaccharide of Acinetobacter calcoaceticus BD4. Eur J Biochem. 1985 Oct 15;152(2):453–458. doi: 10.1111/j.1432-1033.1985.tb09218.x. [DOI] [PubMed] [Google Scholar]
- Kaplan N., Zosim Z., Rosenberg E. Reconstitution of emulsifying activity of Acinetobacter calcoaceticus BD4 emulsan by using pure polysaccharide and protein. Appl Environ Microbiol. 1987 Feb;53(2):440–446. doi: 10.1128/aem.53.2.440-446.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Silman I., Katchalski E. Water-insoluble derivatives of enzymes, antigens, and antibodies. Annu Rev Biochem. 1966;35:873–908. doi: 10.1146/annurev.bi.35.070166.004301. [DOI] [PubMed] [Google Scholar]