| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| xose | "Fantastic @SuziT9! Is it possible to have a digital copy of the step-by-step instructions? Looking forward to try these minikites! " | Read more » | about 6 years ago | |||
| warren | "Love this! Thank you, Paz! " | Read more » | over 6 years ago | |||
| warren | "@warren awards a barnstar to pazb for their awesome contribution! " | Read more » | over 6 years ago | |||
| warren | "Hi, @mjain26 and @bsugar!!! We featured this story in today's blog post and Kickstarter update - thanks for your great work!! https://publiclab.or..." | Read more » | almost 7 years ago | |||
| liz | "This is amazing feedback!!! Thank you so much, i can't believe i just saw this now. " | Read more » | almost 7 years ago | |||
| warren | "Great question -- I used tags to add the prompt for posting replications; if you're willing, would you mind posting your results using the button a..." | Read more » | over 7 years ago | |||
| cfastie | "You are correct that this is not really an extraction. It's just plant material chopped up finely in a blender with some liquid. I also did this wi..." | Read more » | over 7 years ago | |||
| 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 » | over 7 years ago | |||
| straylight | "thanks ygzstc, that makes sense. I think that the approximation that relative intensity measured from the scope can be used in place of the log rel..." | Read more » | about 8 years ago | |||
| ygzstc | "Yes the Beer-Lambert Law is based on -log(I/Io) but it's applicable for a single wavelength value. (https://en.wikipedia.org/wiki/Beer%E2%80%93Lamb..." | Read more » | about 8 years ago | |||
| warren | "It's odd -- I see the graphs. Straylight, can you contact web@publiclab.org so we can figure out what's going on there? " | Read more » | about 8 years ago | |||
| straylight | "Thanks for the question. My apologies that all of the graphs appear to have vanished (they have for me). Not sure why, maybe a hosting issue. Anyw..." | Read more » | about 8 years ago | |||
| anjohn12 | "Quick question, I'm trying to do something similar for a school project. Shouldn't the absorbance of the sample be the negative log of the percent ..." | Read more » | about 8 years ago | |||
| msysinfo | "I need to measure oil concentration in a water mixture. Can a SPECTROMETER be used to measure the oil concentration? If it a solute that dissolves ..." | Read more » | over 8 years ago | |||
| kgradow1 | "Listed! " | Read more » | over 8 years ago | |||
| liz | "Thank you for this incredible documentation! Do you have a list of what you purchased from the Science Company? I bet other people would like to re..." | Read more » | over 8 years ago | |||
| straylight | "Good points and I understand how you feel, coming at his from a chemistry teachers viewpoint myself. I guess it depends on what experiments and dem..." | Read more » | about 9 years ago | |||
| srpratt | "I'm new to the cellphone-becomes-a-photospec phenomenon, as I was told about this by a colleague. As an AP Chem teacher, I'm looking for hacks to ..." | Read more » | about 9 years ago | |||
| ichinarayan | "ok thanks so much " | Read more » | over 9 years ago | |||
| straylight | "In spectral workbench, when you are looking at a spectra, there is an option to export and save the data in a variety of formats, including xml and..." | Read more » | over 9 years ago | |||
| ichinarayan | "wow beyond belief. i thought it was complicated listing program. and how do you exported the spectra image into csv form? thanks a lot " | Read more » | over 9 years ago | |||
| straylight | "Thanks for the question ichinarayan, I exported the spectra in csv form into microsoft excel. From there I selected the wavelengths I wanted to st..." | Read more » | over 9 years ago | |||
| ichinarayan | "what software do you use for your analisis program used to generated graph? " | Read more » | over 9 years ago | |||
| mathew | "Sounds fun! here are a few pointers re: your problems. IT helps to take a first picture of the horizon to set the contrast and focus. always try t..." | Read more » | almost 10 years ago |