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27 November 2013 12:59 pm ,
Vol. 342 ,
The new head of the National Center for Science Education promises to "fight the good fight" against attacks on...
Analyses of the H7N9 strains isolated from four new cases show that the virus is evolving rapidly, heightening anxiety...
In 2009, Jack Szostak shared a Nobel Prize for his part in discovering the role of telomeres, the end bits of...
Science has exposed a thriving academic black market in China involving shady agencies, corrupt scientists, and...
Paper-selling agencies flourish in the aura of reputable businesses. For some scientists, it may be difficult to tell...
Data collected by satellites and floating probes have chronicled a 2-decade rise in the temperature and thickness of a...
Cholesterol, the artery-clogging molecule that contributes to cardiovascular disease, has another nasty trick up its...
Until recently, the Defense Advanced Research Projects Agency (DARPA) kept its plans for its $70 million portion of the...
- 27 November 2013 12:59 pm , Vol. 342 , #6162
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ScienceShot: How Natural Is Your Cola?
6 May 2011 1:32 pm
Water, sugar, and caramel coloring are the main ingredients in most soft drinks, but some "natural" beverage makers add cola nut extract to the recipe—and extra cents to the price tag. Now, researchers in Italy have developed a method to test whether these premium colas live up to their billing. The team took 1 liter of a particular naturally flavored soda brand and dumped in millions of tiny beads, each coated with a different sequence of amino acids. Some of the amino acid combinations latched onto the cola nut proteins in the soft drink. The researchers then separated out the captured proteins and identified them. When the team followed the same procedure with a liter of Coca-Cola, which does not claim to use cola nuts in its recipe, they found no protein signature. The technique, published today in the Journal of Proteome Research, could help consumer groups test the authenticity of naturally flavored sodas or other beverages, the researchers write.
See more ScienceShots.