Comments

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 » 24 days 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 2 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 3 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 3 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 3 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 3 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 3 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 3 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 3 years ago
Ag8n "See below These are photos taken from" the particle atlas", second edition, volume II, by mccrone. " | Read more » about 3 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 3 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 3 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 3 years ago