| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| JSummers | "I hate to say it, but it looks like your laser peak at 499 nm looks like it was truncated, meaning that your fluorescence intensity is 25% of what ..." | Read more » | over 10 years ago | |||
| mathew | "Not only excellent research- that last photo has some high-modernist artistic merit! " | Read more » | over 10 years ago | |||
| warren | "I also tried using a reflective metallic surface behind the cuvette to make the fluorescence brighter: It was hard to see, naked eye or by camer..." | Read more » | over 10 years ago | |||
| donblair | "Oh a whim, I just searched for 'gelatin reagent' and got this: "The Thermo Scientific™ Remel 12.5% Gelatin Reagent, Acidified Mercuric Chloride is..." | Read more » | over 10 years ago | |||
| mathew | "OK- complication-- gelatin will fluoresce when hit with UV: http://www.sciencedirect.com/science/article/pii/S0315546387710980 " | Read more » | over 10 years ago | |||
| mathew | "yes-- I used even smaller ones, the #4 caps. they have a nice "snap" closed that seals them when pushed together. gelatin passes UV, I believe. ..." | Read more » | over 10 years ago | |||
| donblair | "Ah, found a pic: " | Read more » | over 10 years ago | |||
| donblair | "Woohoo! Mathew, this is brilliant. Could you include a closeup shot of the gel cap w/out liquid -- or I'll just search online -- are they relative..." | Read more » | over 10 years ago | |||
| mathew | "that is heartening to see, that is a nice response curve for the oil " | Read more » | over 10 years ago | |||
| mathew | "Hmmm... yeah. The SYBA was a good camera. it has 2x the silicon. I've been searching for 1/3" CCD security cameras-- that would put us back to th..." | Read more » | over 10 years ago | |||
| warren | "Hi, Mat - I've noticed that olive oil fluorescence is much dimmer than crude oil fluorescence, and I shipped you some crude samples this morning. T..." | Read more » | over 10 years ago | |||
| jaia | "I love the price on these cuvettes from Carolina Biological -- $29.95 for a pack of 100. http://www.carolina.com/spectrophotometer-accessories/spec..." | Read more » | over 10 years ago | |||
| mathew | "I reported a lensing effect from the curved top of the gel caps, and wanted to answer the question of whether the fluorescence could be improved if..." | Read more » | over 10 years ago | |||
| mathew | "what are Biro's? " | Read more » | over 10 years ago | |||
| amysoyka | "How about using empty Biro's? " | Read more » | over 10 years ago | |||
| mathew | "What happens if you unscrew the lens on the laser and put it in front of the LED? can you concentrate the light to make a brighter point? " | Read more » | over 10 years ago | |||
| warren | "You're right - it's a pretty high baseline. Something like 10%, no? I believe this is noise, but some may be related to infrared reflectivity insid..." | Read more » | over 10 years ago | |||
| ttaylor | "Warren, it's really exciting to see this sort of technology diffusing out of academia. All of your question are interesting, here are a few more th..." | Read more » | over 10 years ago | |||
| warren | "Hi, Livio - I was so fascinated with your post -- where exactly did you collect a sample from, and was it soil? Water? " | Read more » | over 10 years ago | |||
| warren | "Another draft of the paper research note: I also made a Post-It notepad of these on Zazzle.com: http://www.zazzle.com/public_lab_paper_research..." | Read more » | over 10 years ago | |||
| amysoyka | "Also some tips on the straws. *Straws seal best of you wait until the tongs are hot and then put them in. *To get liquid in them, flip, squeeze, ..." | Read more » | over 10 years ago | |||
| amysoyka | " @warren As far as I can tell, kinda this was done with a cheap UV light - not a high intensity laser LED... " | Read more » | over 10 years ago | |||
| mathew | "Gelatin capsules are super cheap, and gelatin is very transparent. they won't dissolve in oil, I don't think-- but they are water soluble. That wo..." | Read more » | over 10 years ago | |||
| warren | "UV laser through a fish oil pill tested here: http://publiclab.org/notes/warren/08-14-2014/sample-container-search#c10038 " | Read more » | over 10 years ago |