Author Comment Last activity Moderation
scarletjohnson "I am a scarlet johnson doing a job as a marketing consultant at vonza in USA, Vonza helps thousands of business owners just like yourself launch an..." | Read more » almost 2 years ago
danbeavers "The cotton balls that I have do not have brighteners. I checked with my UV laser. I was wondering if they have the same absorption characteristic..." | Read more » over 7 years ago
mcairns "Hi All, Tampons shouldn't contain brighteners--we tested several different types, from the "all natural and organic" types, to plain old Tampax, to..." | Read more » over 7 years ago
danbeavers "I wonder if just plain cotton balls would work just as well? " | Read more » over 7 years ago
gretchengehrke "What kind of tampons did you use in this experiment? I was just looking up tampon materials, and it looks like different brands use cotton, rayon,..." | Read more » over 7 years ago
warren "This is one of the first things that was done with UV fluorescence with the Public Lab Spectrometer -- showing brighteners in free & clear laun..." | Read more » over 7 years ago
gretchengehrke "This is great. Using absorbent materials to concentrate aquatic contaminants for analysis has a good, long history and the next step -- extracting..." | Read more » almost 8 years ago
warren "Hi, I don't see a map -- did you have a link or image to share? Thanks! " | Read more » about 8 years ago
PlaceMatters "I got to see a demonstration of CHARM last month -- what an amazing application! One of the best uses of the DIY touchtable to date. Thanks for t..." | Read more » almost 11 years ago