A very fast centrifuge used to precipitate large biological molecules from solution or separate them by their different rates of sedimentation.
- ‘After removing the cell debris by centrifugation, supernatant was layered on a 5.7 M CsCl / 0.01 M EDTA solution in an ultracentrifuge tube and centrifuged in a swinging bucket rotor at 40,000 rpm for 16 hr.’
- ‘The sarcosine insoluble fractions were removed by centrifugation at 100,000 g for 1 h in an ultracentrifuge, washed once with PBS, pH 7.4 and used as outer membrane protein fractions.’
- ‘Boundary sedimentation and sedimentation equilibrium experiments were performed using an analytical ultracentrifuge Optima XL-I from Beckman Instruments (Palo Alto, CA) equipped with absorbance and interference optics.’
- ‘The supernatant was recentrifuged at 109,000 g on a tabletop ultracentrifuge (Rotor TLA 45 of Beckman centrifuges, Beckman Coulter, Fullerton, CA) for 1 h.’
- ‘PLY solution species from monomer via multimeric intermediates to ring-shaped oligomers were studied with time-dependent sedimentation velocity in the analytical ultracentrifuge.’
Subject to the action of an ultracentrifuge.
- ‘To concentrate the solution, the collagen was ultracentrifuged at 10 deg C for 26-48 It for preparation of 10-45 mg/ml gels.’
- ‘The sample was then ultracentrifuged for 1 hour at 141,000 × g to remove membranes.’
- ‘The supernatant was ultracentrifuged at 105,000 × g, 4°C for 1.5 h.’
- ‘The homogenate, obtained after sonication, was ultracentrifuged at 60 000 g for 30 min.’
- ‘The remaining sample was ultracentrifuged to obtain the sputum sol phase.’
- ‘An additional 34 ml buffer solution was added and the sample was then ultracentrifuged at 100,000 × # for 4 h.’
We take a look at several popular, though confusing, punctuation marks.