Public Lab Research note


This is an attempt to replicate an activity.

Crystalline silica from tile grout at AS220 microscope workshop

by warren | December 02, 2018 17:58 | 205 views | 9 comments | #17785 | 205 views | 9 comments | #17785 02 Dec 17:58

Read more: publiclab.org/n/17785


warren was awarded the Photo Documentation Barnstar by xose for their work in this research note.


We had a really interesting time building microscopes and trying different lighting, slide preparation, and dyeing (with beet juice) and I wanted to share some of the photos we got from our different #communitymicroscope builds (see https://publiclab.org/micro for more on this kit):

This is from tile grout; not full resolution of the webcam but pretty good:

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Here's the micrometer for scale:

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Then we added a 40x microscope lens to try for better magnification; each tick mark is 10 microns, or 0.01mm:

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Above is a nice sharp-edged piece, at ~50 microns or so.

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Above, some interesting grooves and darker colors in there. This is in beet juice to add contrast but maybe that was unnecessary.image description

Finally, there were a lot of these smaller very sharp shards, at ~20x5 microns, perhaps:

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And from last week's #microbrews event:

A poppy seed:

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I'll post more in a bit!


8 Comments

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@xose awards a barnstar to warren for their awesome contribution!

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Fantastic pictures!!! Which camera did you use?

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Mine at the top are with the hi res webcam kit, but @peasepoint's are with the basic microscope kit... a very cheap webcam!

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Awesome! Those with the spheres are impressive!

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This one from a while back!

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