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Re: pool water at the Olympics

September 5, 2016 | A version of this story appeared in Volume 94, Issue 35

Credit: Newscom
Green with envy. Or algae. Or copper: You can’t prove it isn’t envy …
A photograph shows the green diving pool at the Rio Olympics with the neighboring water polo pool still blue.
Credit: Newscom
Green with envy. Or algae. Or copper: You can’t prove it isn’t envy …

Media coverage of how some pools at the Rio Olympic Games turned green in color (C&EN, Aug. 29, page 48) led online readers to hypothesize about the cause behind the transformation.

I’m guessing it wasn’t fluorescein dye, as the plumbers union does in Chicago every year around St. Paddy’s Day.
Robert Chapman via Facebook

I proposed that the green hue was caused by iron. I’d like data to confirm or reject this hypothesis. #curiosity #imascientist
Jamie Vernon (@JLVernonPhD) via Twitter

My favorite part is how a #Rio2016 spokesman said that “chemistry is not an exact science.” I guess that depends on who’s doing it.
Alex Berezow (@AlexBerezow) via Twitter


July 18, page 7: The news story about a mutant enzyme that produces novel triterpenes showed the wrong structure for the pentacyclic triterpene. Here is the correct structure.

Aug. 1, page 2: The chemical safety letter about peroxide formation should have referred to “2-propanol,” not “isopropanol,” which incorrectly combines two different alcohol naming conventions.

Aug. 15/22, page 49: The Talented 12 profile about University of California, Berkeley, chemist Ke Xu incorrectly stated that a technique he developed could distinguish between components in a cell that are less than 10 nm apart. It can distinguish between components that are 10 nm apart or more. The profile also incorrectly stated that, in the past, researchers had to use different cell samples in order to use superresolution fluorescence imaging and electron microscopy. Researchers have used both techniques on the same sample, but the sample had to go through a difficult, error-prone dehydration process.



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