The Diatome Perfect Loop allows you to pick up sections consistently, without causing them any damage.
It is the only loop currently available where the external diameter is the same as the grid and the internal diameter slightly larger than the observed area in the electron microscope.
The thickness of the Diatome Perfect Loop is about 40 microns. Due to the fact that the diameter of the Diatome Perfect Loop is the same as the diameter of the grid, they are attracted to one another when in water and are drawn together by the surface tension of the water. Even if the section touches the inside of the grid during blotting, the area of contact is minor and the section is not damaged.
When the grid is removed from the Diatome Perfect Loop, the section always remains on the grid.
Room Temperature Pick-up
Have your cleaned grids sitting on clean filter paper in a Petri dish.
Ensure the ribbon of sections is short enough to fit inside the Diatome Perfect Loop.
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| 1. Centre the
Diatome Perfect
Loop above the
sections. |
2. Slowly lower the
Diatome Perfect
Loop over the
sections and
touch the water. |
3. Gently lift up the
Diatome Perfect Loop
with the sections in a
droplet of water. |
4. Lower the Diatome
Perfect Loop onto a
grid and lift up again. |
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| 5. The grid holds to the
Diatome Perfect Loop
by surface tension. |
6. Lower the Diatome
Perfect Loop to the filter
paper to remove water. |
7. For coated grids, touch
the filter paper to
remove the water. |
8. Separate the grid
from the Diatome
Perfect Loop with an
eyelash. |
Cryo Pick-up
Pick-up and mounting on grids with sucrose or sucrose/methyl-cellulose.
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1. Pull the sections away from the cutting edge
with an eyelash. |
2. Dip the Diatome Perfect Loop into sucrose or
sucrose/methyl-cellulose. |
3. Hold the Diatome
Perfect Loop above
the cryo sections |
4. Touch the sections
with the almost frozen
sucrose or
sucrose/methyl-
cellulose. Gently lift
up the Diatome
Perfect Loop and
bring back to
room temperature. |
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| 5. Lower the Diatome
Perfect Loop onto a
grid and lift up again |
6. Place the Diatome
Perfect Loop upside-
down on a water or
buffer surface to wash
out the sucrose or
sucrose/methyl-
cellulose and allow
the grid to float free. |
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