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Revision as of 16:30, 10 July 2010

Growing Broth for Pseudomonas

Composition of Medium • 100 mg Naphthenic acids /L

(Modified Bushnell-Has medium) • 1000 mg KH2PO4 /L • 1000 mg Na2HPO4 /L • 500 mg NH4NO3 /L • 500 mg (NH4)2SO4 /L • 200 mg MgSO4 ∙ 7H2O /L • 20 mg CaCl2 ∙ 2H2O /L • 2 mg FeCl3 /L • 2 mg MnSO4 ∙ 2H2O /L pH of Bushnell-Has Medium: 7.0 Protocol • Prepare naphthenic acids stock • Mix 1 g naphthenic acid /L in dilute NaOH. • Adjust pH of the solution to 10-11 to dissolve naphthenic acids into the solution as sodium salts • Making the Growing Broth • Mix 20 ml naphthenic acid stock with 170 ml sterilized water in 500 ml erlenmeyer flask. • Prepare 10 ml Bushnell-Has medium in vial • Mix arbitrary amount of pseudomonas strain in B-H medium • Transfer medium to erlenmeyer flask • Incubation (aerobic conditions) • Incubate stock at room temperature (20 °C) on a shaker at 200 rpm.