| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Although the absolute values you computed for NDVI are lower than they should be, it appears that your process is successfully discriminating betwe..." | Read more » | over 5 years ago | |||
| Bronwen | "Just a word of caution: kites can be harder to maneuver if you're in an area with a lot of buildings and trees-- they typically require more space ..." | Read more » | over 5 years ago | |||
| warren | " There are a lot of designs up at #picavet - maybe one of them would be a helpful starting point? Also there are a LOT of designs up here: https:..." | Read more » | over 5 years ago | |||
| Ag8n | " There are several manufacturers of handheld XRF analyzers. And yes, they are usually cost limited. The cost can be reduced somewhat by renting, i..." | Read more » | over 5 years ago | |||
| iragersh | " Not really relevant. I was on the PublicLab Open Hour call and I asked a question but can't remember the answer. I asked about finding lead on t..." | Read more » | over 5 years ago | |||
| warren | "And the same page above lists Alternate EPA 3050B and 6010 methods for lead at $55. " | Read more » | over 5 years ago | |||
| warren | "Also the UMASS Amerst Soil Lab offers a $20 test for lead, although I don't know much more about it. It is a "mail-in" test though so perhaps outsi..." | Read more » | over 5 years ago | |||
| warren | "Wow, interesting; these "SprayView" kits have a great illustration of colorimetric detection: https://www.chemsee.com/residential/detection-kits-f..." | Read more » | over 5 years ago | |||
| warren | " Hi @read_holman -- I did find this XRF tool for soil testing: https://www.bruker.com/products/x-ray-diffraction-and-elemental-analysis/handheld-xr..." | Read more » | over 5 years ago | |||
| humanetechnologies | "Hi @warren, I am sorry for the delayed response. Thanks much for your understanding. I have just modified the page to avoid any such confusion. Tha..." | Read more » | over 5 years ago | |||
| JSummers | "Lehninger, Principles of Biochemistry, Fourth Edition, David L. Nelson and Michael, M. Cox. WHFreeman & Co, NY. Chapter 6, Sections 6.3 (Enzyme..." | Read more » | over 5 years ago | |||
| Ag8n | " Can you give me the reference ( e.g.Lehninger)? I'd like to look it up. Regards " | Read more » | over 5 years ago | |||
| JSummers | " Hi Ag8n, Thanks for your interest. No, we are not headed toward chromatography although the flow cell & spectrometer are pretty well set up fo..." | Read more » | over 5 years ago | |||
| Ag8n | " The set up seems very similar to one we used for flow injection analysis (F IA). Interesting article. It looks like you have one artic!e left. A..." | Read more » | over 5 years ago | |||
| JSummers | " Hi Ag8n, Thanks for the comment. I am glad you are interested. We just connected the VBAT pin to the +3.3 volt bus. You did not miss any descrip..." | Read more » | over 5 years ago | |||
| Ag8n | " With your vbat pin, did you connect it directly to the +3.3v or go thru a pull up resister? What value resister did you use? Very interesting pr..." | Read more » | over 5 years ago | |||
| Ag8n | " Very interesting. I don't know if a chemist or biochemist who doesn't get tired of pipeting. And the robotic ones are expensive. Looking forwar..." | Read more » | over 5 years ago | |||
| selema | " instagram takipçi " | Read more » | over 5 years ago | |||
| chunbr | " I did this! Use 25.103 as the multiplier to scale the .stl file to the proper size in Cura and also the diffraction gradings are available on Amaz..." | Read more » | over 5 years ago | |||
| chunbr | "I did this! Use 25.103 as the multiplier to scale the .stl file to the proper size in Cura and also the diffraction gradings are available on Amazo..." | Read more » | over 5 years ago | |||
| chunbr | "I made this! The print took about 36 hours and Amazon sells $12 diffraction slides. The .stl files aren't scaled properly when imported to Cura, bu..." | Read more » | over 5 years ago | |||
| bps | " This sensor can also be used with an Arduino which allows you to create a data logger but you probably knew that. I see that you have it talking t..." | Read more » | over 5 years ago | |||
| Ag8n | " Just realize, these methods are far from being implemented. The mercury one is " proof of concept", which means it still needs troubleshot, valid..." | Read more » | over 5 years ago | |||
| david_uwi | " It's going from 0-250 ug/m3 (and the x-axis is 42 days).The average value (over 6 weeks) is 17 ug/m3. So the graph shows there are some large spik..." | Read more » | over 5 years ago |