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Posted February 4, 2010
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Taiwan
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This iReport is part of an assignment:
Tech talk |
Fossil/meteorite preparation destroys organics
Fossil/Meteorite preparation destroys organics
To explain my point, I list the following methods for preparing my Meteorite 1. Each method is illustrated with a few figures that resulted from the method. The different methods are then compared on the basis of the blood vessels shown in the figures.
1. Method A: Cutting the sample open only, without washing the sample with water, or wiping them with Kimberly tissue paper or grinding with sandpaper or a machine.
Result: Best in preserving the original organic tissues, such as the outermost surface of blood vessels. But saw dusts would remain on the cut surface. Other people could easily mistake these saw dusts (and the ogranics) as contaminants. The saw dusts could be removed later by sanding or grinding.
Example of results as far as blood vessels are concerned:
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691214849&p=0
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691214847&p=1
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691214848&p=2
2. Method B: Cutting the sample open, washing the cut surface with water and sanding the cut surface with sandpaper.
Result: Less organics are preserved. The outermost surface of blood vessels are usually gone if this method is used. Still, this method preserves more organics than Method C.
Examples of results:
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691209014&p=3
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691552442&p=138
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691552444&p=139
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691552445&p=140
3. Method C: Cutting the sample open, washing and grinding the cut surface with a sanding machine.
Result: Least amount of organics are preserved in this method. This method is the prevalent method used in studying meteorites. No wonder most scientists could not find fossils in meteorites.
Examples of results:
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691521392&p=126
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691521393&p=127
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691521395&p=129
http://www.wretch.cc/album/show.php?i=lin440315&b=25&f=1691521398&p=130
- TAGS:
- technology,
- science
- GROUPS:
- Tech and science
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