| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Matej | "Hi Jeff. I took triplicate spectra of each oil, before mixing it with water and after recovering the oil from frozen water. You can find them at my..." | Read more » | over 8 years ago | |||
| Matej | "@pdhixenbaugh: There are different oil concentrations which can be detected by naked eye. We had a very interesting debate about this at this last ..." | Read more » | over 8 years ago | |||
| Matej | "HI Mary, I am not 100% familiar with methods of collecting oil from soil. I think @eustatic might know better. I saw he had some diluted soil sampl..." | Read more » | over 8 years ago | |||
| warren | "Cool, Matej! Do you have comparison sets of the pure unfrozen/undiluted samples alongside the frozen versions, and also alongside samples in minera..." | Read more » | over 8 years ago | |||
| marlokeno | "@marlokeno- Great work, Matej- Do you have any thoughts on applying your research to collecting samples from frozen soil? How will frozen earth af..." | Read more » | over 8 years ago | |||
| pdhixenbaugh | "@Matej Lots of interesting things here! Anecdotally from the spill response team I work with, it only takes a few drops of oil to create a sheen, s..." | Read more » | over 8 years ago | |||
| mathew | "the crude looks really clipped-- I know there's a dip in the middle but it is really topping out. " | Read more » | over 8 years ago | |||
| warren | "Thanks for your feedback! " | Read more » | over 8 years ago | |||
| warren | "I don't believe those are clipped - I increased the exposure until it just barely touched the top, but did not depress or deform the top of the cur..." | Read more » | over 8 years ago | |||
| mathew | "the 80W-90 looks a bit clipped in the blue: https://spectralworkbench.org/spectrums/55075 the crude is substantially clipped in the blue: https:..." | Read more » | over 8 years ago | |||
| HappyS5 | "Hello! @Matej What a wonderful need. You will be a useful person in your community if something happens. In the latter part of your note, you me..." | Read more » | over 8 years ago | |||
| warren | "These look good too, and come with a spectrum datasheet: http://www.ledgroupbuy.com/solderless-true-violet-led-405nm/ " | Read more » | over 8 years ago | |||
| warren | "Powered on one of these, with a dial: http://www.watterott.com/de/Wattuino-Nanite85?x56e76=f63b1cee028854c06b93338f2945a806 " | Read more » | over 8 years ago | |||
| warren | "Here's the big list of UV LEDs below 405 nm " | Read more » | over 8 years ago | |||
| warren | "Crap, those are only in quantities of 400+ or 1000+. I'll keep looking. " | Read more » | over 8 years ago | |||
| warren | "@tonyc @ygstcu - looking at higher powered LEDs, I've found: ~$4.40: http://www.digikey.com/product-detail/en/VLMU3500-385-060/VLMU3500-385-060TR-..." | Read more » | over 8 years ago | |||
| Matej | "HI Guys, Thanks for your interesting comments! Jeff: I will certainly try to do that. In general I am trying to find out what could be a realistic..." | Read more » | over 8 years ago | |||
| mathew | "Awesome technique! the look of the 5w-30 reminds me of thawed out frozen diesel fuel. I think the milkiness in diesel from freezing is from wax cr..." | Read more » | over 8 years ago | |||
| warren | "Hi matej - are the differences in the 5w30 just by visual inspection or in the spectrum as well? " | Read more » | over 8 years ago | |||
| warren | "The embeds are working again. Thanks for your patience! " | Read more » | over 8 years ago | |||
| warren | "Sorry - for those using HTTPS/SSL, the embeds won't be working at the moment, as we just upgraded PublicLab.org to use extra security, but haven't ..." | Read more » | over 8 years ago | |||
| Craig | "Nice Work " | Read more » | over 8 years ago | |||
| Matej | "Sounds good. I'll certainly do that sometime around next week! Very useful. " | Read more » | over 8 years ago | |||
| warren | "Super. At some point we should overhaul this wiki page with new techniques: http://publiclab.org/wiki/spectrometry-sampling " | Read more » | over 8 years ago |