Help an undergraduate student
l.a.robertson at tnw.tudelft.nl
Fri Mar 4 04:26:37 EST 2005
"Tanya Kuritz" <kuritzt at ornl.gov> wrote in message
news:188.8.131.52.2.20050303173242.02f2d850 at mail.ornl.gov...
> Thanks, Lesley and N10 for this lively, enjoyable discussion and
> protocols! Sounds like we are back to good old days in this group when
> people thought and wrote about micro.
> I like watching cyanobacterial races. Take Oscillatoria or Trichodesmium
> strains, put a grid into your microscope's left ocular (calibration is
> optional - HA!) and measure the speed of cyanobacterial movement on a
> slide, agar coating slows it down but makes watching and recording easier.
> The speed changes a lot depending on what you add to the medium and on the
> illumination source and intensity. Group chemicals by the extent of their
> effect on the speed. Chemicals that affect photosynthesis will be most
> effective. This exercise requires no staining, no immersion objective if
> you do not have one.
Thanks. That's sounds like a good one for my first years in next year's
round of pracs.
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