HERE
I bought a used Beckman Microfuge 12 centrifuge on e-bay for a very low price ($50.00), fortunately from Canada so shipping was reasonable.
Placed a couple of 1.5 mL tubes with green pond water in the holders and gave it a spin today by cranking the speed up to "6" and then back down to "0" (anyone know what the rpm is at "6"?).
Re-suspended one green pellet in a drop of water and took a look.
No damage seems to have been done to the organisms as there were plenty of small ciliates and some amoeboids moving around on the slide.
BHS S 40x Plan Apo 1.25x intermediate tube 2.5x relay lens, DIC; flash
Both images full frame.
Top: edge of coverslip as the water evaporated shows the accumulation of millions of single-celled algae. It was like this around the entire edge and there were still thousands of these throughout the slide.
Bottom: well fed amoeboid.
NU11047 NU11048
