A biologist investigates why the beef soup in the refrigerator suddenly turned blue


by Gerwin Sturm

Experiences such as ``the leftover food turned green due to mold'' are often reported, but you should not hear many reports that the food turned blue. An assistant professor of biological sciences at California State University San Marcos was surprised to find that beef soup in the refrigerator had turned blue and began investigating.

Microbiologist Investigates After Her Beef Soup Turned Blue In The Fridge | IFLScience
https://www.iflscience.com/microbiologist-investigates-after-her-beef-soup-turned-blue-in-the-freezer-67894

You can check the blue beef soup discovered by Mr. Erin Beckett, who specializes in biological science, from the following tweets. Since leftover food is reflected in this photo, it is necessary to be somewhat careful when viewing it, and Mr. Beckett also sets the photo as 'sensitive' content.




Other biologists who saw this photo on Twitter were intrigued. Investigate the cause of the discoloration of the soup and urge Mr. Beckett to write a paper.

Mr. Beckett managed to retrieve the sample while pinching his nose at the terrible stench.




Biologist Sebastian Kociova, who cooperated with Mr. Beckett, found that the microorganisms contained in the blue soup form rainbow-colored colonies. According to Kosiova, many of the microbes called bacilli can form patterns that reflect light like an oil film.




Mr. Koshioba is conducting experiments by combining several microorganisms and cheese to elucidate the mystery that beef soup turned blue. Mr. Koshiova cools the microorganisms by making a prediction that ``it may have been activated by being placed in a low temperature environment and turned blue.''




Microbiologist Nick Coleman said, ``Dairy products and meat are high in tryptophan . Many microorganisms convert this to tryptamine and indole , which oxidizes and stains indigo or similar colors.Maybe this is blue. I guess that's why the soup was born.'




In response to these indications, Mr. Beckett and Mr. Kosiova are working to clarify the mystery, but at the time of writing the article, the reason ``why did it turn blue'' has not been ascertained. Mr. Kosiova said , ``The project is boiled down,'' and is waiting for Mr. Beckett, who has been infected with the new coronavirus, to recover.

A series of uproars were tagged with the hashtag 'bluesoup' and information spread on Twitter, and finally it was published as a small story in the authoritative scientific journal MIT Technology Review.




Also, when Mr. Beckett asked, ``Are there mass spectrometry experts?'' Through this hashtag, a microbiologist at the University of California, San Diego volunteered to cooperate.




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