Dust
question:dust

In environmental regulation, dust is referred to as [particulate matter](/wiki/pm) or #PM....


Author Comment Last activity Moderation
amirberAgain "Another point refers to here is the use of cross polarization, I guess that part of the importance of it is that some materials either have or don'..." | Read more » almost 5 years ago
amirberAgain "It looks like, at the least in part this is an open resource, some parts do require free registration see more here: http://www.mccroneatlas.com/ " | Read more » almost 5 years ago
warren "Great idea. There could be stages of analysis, narrowing in progressively. +1! " | Read more » almost 5 years ago
warren "I also posted a question over here to try to collect images from various sources of respirable silica for use as a reference in our #basic-microsco..." | Read more » almost 5 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 » almost 5 years ago
gretchengehrke "Also, its interesting that cristobalite is rounded. I will look in the literature to see if there is a relationship between cristobalite and silico..." | Read more » almost 5 years ago
gretchengehrke "I'm glad you brought this up, @Ag8n! @Mathew did some work with polarimetry too. See this research note: https://publiclab.org/notes/mathew/05-21-2..." | Read more » almost 5 years ago
gretchengehrke "Thank you so much, @Ag8n! This is exactly what I was hoping to see. I live near Duke University and can see if they have the books there too. Does ..." | Read more » almost 5 years ago
Ag8n "See below These are photos taken from" the particle atlas", second edition, volume II, by mccrone. " | Read more » almost 5 years ago
Ag8n "I checked the images. There are pictures of quartz and several for cristobalite. Didn't see one for tridymite. " | Read more » almost 5 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 » almost 5 years ago
gretchengehrke "We've been trying to use DIY microscopes to distinguish between crystalline and non-crystalline particulate matter. Of course we wouldn't be able t..." | Read more » almost 5 years ago
warren "Wow, would you be able to share an image of "respirable silica"? I'm thinking of how to unpack answers to these questions: https://publiclab.org/q..." | Read more » almost 5 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 » almost 5 years ago
warren "This is fantastic - do you have a copy or could we find a copy and share pictures especially of silica particles? " | Read more » almost 5 years ago
warren "@DavidMack posted on sticky pads a while back on the #particle-sensing page: Essentially tape, sticky pads have the advantage of capturing a recor..." | Read more » almost 5 years ago
warren "Also see this great section by @DavidMack -- https://publiclab.org/wiki/particle-sensing#EPA+Test+Methods " | Read more » almost 5 years ago
stevie "One idea from @dswenson that came from the open call yesterday was to use materials like sticky yellow flytraps like these " | Read more » about 5 years ago
stevie "When we were in WI @gretchengehrke, @mathew, and I were visiting some friends and we took a sample from a window at their house. The house window w..." | Read more » about 5 years ago
AdditiveFutures "stacked acrylic sheets. volumes determined through cutting thin sheets with a laser cutter.. " | Read more » about 5 years ago
shakti1418 "Track Package using UPS tracking number UPS drop off locations near me ups drop UPS Shipping Locations whatsapp gb download spotify premium apk 201..." | Read more » over 5 years ago
gretchengehrke "For regulatory purposes, the EPA doesn't actually measure the size of individual particles. Rather, they use a pump with an impactor. This pumps in..." | Read more » over 5 years ago
kgradow1 "Potential resource: A Guidebook for Particle Size Analysis (industry) https://www.horiba.com/fileadmin/uploads/Scientific/eMag/PSA/Guidebook/pdf/..." | Read more » over 5 years ago
warren "@gretchengehrke mentioned 5 microns for "respirable airborne particles", in her post here: Citing @mathew (Silica dust less than 5 ?m in diameter ..." | Read more » over 5 years ago