| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| iamkat | "Hi, I tried to re-create the lycopene extraction with methanol and ethanol (lab grade) but didn't get anywhere. It's my understanding that they are..." | Read more » | about 8 years ago | |||
| warren | "I'm also looking for a better photo of a Desktop Spectrometry Starter Kit pointed at a CFL bulb, so if you have one please help me improve this post! " | Read more » | about 8 years ago | |||
| mathew | "The wire might not be visible, but I had the wire through the PVC, and wrapped the line around that. It worked great. " | Read more » | over 8 years ago | |||
| tonyc | "For oblique shots, there's a simple way to hang a miniball tripod head off the bottom of a pendulum. Did you use the wire to connect the PVC to t..." | Read more » | over 8 years ago | |||
| kkoerner | "LukeS good to know, thanks for testing out those pumps and posting your results! " | Read more » | over 8 years ago | |||
| mathew | "Great writeup, Luke! cool work. " | Read more » | over 8 years ago | |||
| LukeS | "@kkoerner, I tried a similar pump when I was researching this and it created too much turbulent/pulsed of the air stream to get a good measurement ..." | Read more » | over 8 years ago | |||
| eustatic | "awesome effort. " | Read more » | almost 9 years ago | |||
| mathew | "further followup on analysis of samples. " | Read more » | about 9 years ago | |||
| mathew | "read my follow-up on imaging the samples " | Read more » | about 9 years ago | |||
| bareczek | "interesting " | Read more » | about 9 years ago | |||
| nshapiro | "@kkoerner Hi Karl! Great find! It would be fantastic if you could request a quote on these. We are planning on have a lending library of these tool..." | Read more » | over 9 years ago | |||
| kkoerner | "Any thoughts on using a smaller pump? If you're only trying to draw 0.3 SLPM, there are a couple of pumps (see the attached datasheet and catalog) ..." | Read more » | over 9 years ago | |||
| danbeavers | "It appears you need some more ventilation or perhaps start using the remediation process. http://publiclab.org/notes/nshapiro/10-20-2014/diy-indoo..." | Read more » | over 9 years ago | |||
| mathew | "Just repeated this test today at 26 degrees, and temperature corrected we got 25ppb. So good news: consistency. Bad news: consistently hazardous c..." | Read more » | over 9 years ago | |||
| mathew | "I ran a formaldehyde test over by our shipping station, now that the flow on our lending kit is calibrated. We got 26ppb, or about 3.5x the chroni..." | Read more » | over 9 years ago | |||
| mathew | "Our portland office has .026ppm (26ppb) of formaldehyde when measured over by our packing and shipping area. That's over 3 times the chronic dange..." | Read more » | over 9 years ago | |||
| danbeavers | "Another observation: It would be good to have a check list for the measurement. For example: Verify that the humidity is above ?? and below ??..." | Read more » | over 9 years ago | |||
| danbeavers | "@Mathew The following is from a mechanical engineer friend of mine: Assuming you could pull a reasonably good vacuum on the orifice, you could ge..." | Read more » | over 9 years ago | |||
| danbeavers | "Mathew: That sounds like a mechanical engineer (which I am not) question. I SUSPECT that it will be the sum of the restrictions because of the lo..." | Read more » | over 9 years ago | |||
| nshapiro | "Here is a photo of the tip breaker that is on some of the analog pumps. We could also pre-score them in a standardized way to create consistent ope..." | Read more » | over 9 years ago | |||
| mathew | "@Danbeavers what if we put a standardized, small orifice on the broken end of the glass tube that is always smaller than a hole broken into the tub..." | Read more » | over 9 years ago | |||
| danbeavers | "Perhaps @Stevie could order them. " | Read more » | over 9 years ago | |||
| warren | "I'm arriving tomorrow -- if you could order those I'd buy them off of you when I arrive, or we could just order tomorrow night when I get in. I jus..." | Read more » | over 9 years ago |