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 Previous Article

Appl Environ Microbiol. 1987 September; 53(9): 2269-2270

Drag reduction by Acinetobacter calcoaceticus BD4.

N Sar and E Rosenberg

Department of Microbiology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Israel.

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.

Appl Environ Microbiol. 1987 September; 53(9): 2269-2270






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