Added: Nov 20, 2008
From: h4ck3rm1k3
Duration: 1:8
The James M. DuPont Meteorite Collection - the diatoms have been trans- ferred to them. After the thin film of water thus condensed on them has evaporated, they adhere sufficiently not to fall off when the grid is placed in the electron microscope, and will normally remain in position through a number of insertions into and removals from the instrument. I find it possible to transfer the diatoms freehand, even specimens the major axis of which is between 10 and 15 n in length. For this I use a bristle mounted on a cylindrical rod of wood about as thick as a pencil and sharpened like one to a point at one end. The bristle is stuck to this point with about 2 mm. protruding. Pelletan (1888) and Hustedt (1927) recommend a pig's eyelash as the most suitable bristle and I find one very satisfactory. A number of types of mechanical fingers for
Channel: Education
Tags: carbonaceous cyanobacteria fossils life meteorite
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