otk
otk


Author Comment Last activity Moderation
warren "And do you have a link to the HAZCAT guide from Randy? Thanks! " | Read more » over 8 years ago
warren "Oh, just noticed -- on your dielectric fluid scan, you need to select a new cross section -- the top row of pixels is blank. Great post! " | Read more » over 8 years ago
warren "@ernestootero -- what about methanol, which is somewhat less toxic than hexane or acetone? Have you used isopropyl? " | Read more » over 8 years ago
eustatic "I should note that the link is just a clip of the LEAN one, a small amount of pages suitable as a handout for community monitoring trainings. by c..." | Read more » over 8 years ago
stoft "Jeff, I did a few quick tests and added an "Opacity" section above. While more observations are needed, these limited results are interesting. " | Read more » over 8 years ago
stoft "Thanks; good comments. 1 - Dilution: I updated the note to clarify that the larger signals were only attenuated to better match the range of the w..." | Read more » over 8 years ago
warren "I especially appreciated your introduction of a "false positive" of laundry detergent here; excellently displayed too. In your first two conclusio..." | Read more » over 8 years ago
warren "There is a LOT in this post; first, thank you Dave for a very thorough analysis! I'm sure I'll have more to add, but to start with, a clarificatio..." | Read more » over 8 years ago
warren "Hmm, the TAC one is excellent -- maybe the "Sidebar: Comparing Your Results with Standards" on p51 could be linked to from our Homebrew doc? " | Read more » over 8 years ago
gretchengehrke "Great resources! I'll make a wiki to collect these: https://publiclab.org/wiki/enviro-guide-resources " | Read more » over 8 years ago
stevie "Here is the Tulane one:: http://www.tulane.edu/~telc/assets/citz_guide.pdf " | Read more » over 8 years ago
stevie "I was Just looking for this publication online. Thanks for posting Scott. Any ideas where we can get the full one? @gretchengehrke you should chec..." | Read more » over 8 years ago
eustatic "wow " | Read more » over 8 years ago
stoft "Gretchen, thanks for the insight. I'd read that the generally broad fluorescence spectrum is, as would be expected, a combination of many spectral..." | Read more » over 8 years ago
gretchengehrke "This is a really great post, Dave! As for the concentration effects, in addition to quenching, there is also shielding, and there can be another p..." | Read more » over 8 years ago
stoft "I just ran some new calculations looking at the curves from my existing data and found a possible correlation between oil density and the centroid ..." | Read more » over 8 years ago
stoft "Jeff, thanks. 1 - Yes, you are right, there is a "glow" from EVO. However, that peak is small and out at 650nm past where it has little effect. I ..." | Read more » over 8 years ago
warren " "visually differentiate between the five (5) test samples" - here, you mean based on qualitative visual inspection of the graphs, right? Do you be..." | Read more » over 8 years ago
warren "This is super, and very impressive, Dave. I have a number of comments/questions, but I'll start with just a few: I'm very surprised to hear that ..." | Read more » over 8 years ago
ernestootero "Warren, the 80w90 peak to the left seems to be related to excitation. The res of the spectrum may seem truncated due to high signal. " | Read more » over 8 years ago
eustatic "I owe Matej samples. Stevie gave me some brown jars, so i can divide the bulk samples and mail them to him. then, we can zap them independently! S " | Read more » over 8 years ago
warren "Cool, thanks Ernesto -- interesting shape on the 80w90 graphs, but it's not clipped or anything: @ygstcu, do you have thoughts on this dataset?..." | Read more » over 8 years ago
warren "Cool; i mentioned isopropyl alcohol as a possible evaporate-able solvent in the comments on https://publiclab.org/notes/Matej/12-21-2015/first-pig-..." | Read more » over 8 years ago
warren "Tar Balls over time? Scott, I'd be really interested if you collected a set of a bunch of different tar ball spectra, esp. in different states of ..." | Read more » over 8 years ago