Tag Archives: Bacteria

Controversy over a bacterium that grows in arsenic — an update

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Astrobiology Press Conference (201012020001HQ)

Dr. Felisa Wolfe-Simon at Astrobiology Press Conference

The upheaval in the scientific community revolving around the allegedly arsenic-exploiting bacterium has neared its end.

The turmoil started at the end of year 2010 when Dr. Felisa Wolfe-Simon, a NASA astrobiology fellow, reported that her team has isolated a strain of bacterium termed GFAJ-1 which not only can grow in arsenic-rich medium but also incorporates arsenic into its essential biomolecules, including DNA and proteins. (For more recap, check out my older post.) Arsenic is very similar to phosphorus. However, unlike phosphorus which is essential to living creatures, arsenic is poisonous. Continue reading –>



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Office bacteria — Men’s offices are more contaminated than women’s

***This blog has moved to a new location. Visit the new site for more posts and updates! (http://www.SomethingAboutScience.com)***

Have you ever thought about how many bacteria cover the surface of your computer keyboard or mouse? How about when you make a phone call? This post will get you thinking!

It is said that millions of people spend about 90% of their time indoors. Many of them are working more than 8 hours a day in offices. With increasing number of people spending more time in their offices, it would be good to understand the other “inhabitants” of the work space – bacteria. Previous studies showed that an office building has as many as one million bacteria in a cubic meter (or 35-cubic feet) of air. Continue reading –>


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