| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | "It's much more complicated than it seems. It isn't whether something is sand or silica. Because, by definition, they are the same thing. Sand is..." | Read more » | about 4 years ago | |||
| Ag8n | "I agree that the original data should be used. But, if the sanity check is not zero, that result should also be recorded, or at least noted. " | Read more » | over 6 years ago | |||
| Ag8n | "This seems similar to some microscopes that use a CD or DVD player lense with a phone camera to act as a microscope. Built a couple with the dvd l..." | Read more » | about 7 years ago | |||
| Ag8n | "Strike 2. The place I was referred to intends to start class 100 k testing in the near future.... But not now. " | Read more » | about 7 years ago | |||
| Ag8n | "The best way to test a HEPA filter is with an air particle counter. Thought I could borrow one from a local university. They do not have one. It..." | Read more » | about 7 years ago | |||
| Ag8n | "I don't know if you have a protocol in mind, but let me know exactly what you want. I also need to do some digging. May be able to find a particl..." | Read more » | about 7 years ago | |||
| Ag8n | "How about using foam pipe insulation and adhesive for the frame? Then hold the filters in place with bungee cords? Maybe as a cost savings? " | Read more » | about 7 years ago | |||
| Ag8n | "Something similar has been used as an improvised food dehydrator for years. See some of the old episodes of Good Eats. Wonder if the dehydrator w..." | Read more » | about 7 years ago | |||
| Ag8n | "It gives a range of magnifications. As for sample prep- "samples were mounted in aroclor 5442 or the equivalent Carville refractive index liquid 1..." | Read more » | about 7 years ago | |||
| Ag8n | "See below These are photos taken from" the particle atlas", second edition, volume II, by mccrone. " | Read more » | about 7 years ago | |||
| Ag8n | "I checked the images. There are pictures of quartz and several for cristobalite. Didn't see one for tridymite. " | Read more » | about 7 years ago | |||
| Ag8n | "I'm no expert on microscopy. Did mess with it a little. The difference I notice is a lot of the work is done with crossed polars- messing with th..." | Read more » | about 7 years ago | |||
| Ag8n | "I do have a copy of edition two, which is four volumes. Volume 1 goes over microscopes, volume 2 gives pictures of the different materials, and vo..." | Read more » | about 7 years ago |