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SpaceX-3 mission to return Dragon's share of Space Station science
Date:5/16/2014

April launches bring May research returns. While the splashdown of SpaceX's Dragon spacecraft on May 18 will conclude the company's third contracted resupply mission to the International Space Station, it also serves as a high point for the scientists who have investigations returning to Earth who are eager to complete their analyses.

When the Dragon spacecraft splashes down in the Pacific Ocean, it will carry with it more than 1,600 pounds of scientific supplies. These supplies include samples from biology, biotechnology and physical science investigations, as well as human research.

"While some of this data can be obtained by on orbit analysis, many analysis techniques have not been miniaturized or modified to allow them to be performed on orbit, which means sample return is the only way to obtain this data," said Marybeth Edeen, space station research integration office deputy manager at NASA's Johnson Space Center in Houston.

One of many studies returning examines drug-resistant bacteria to determine gene expression patterns and changes in microgravity. The Antibiotic Effectiveness in Space (AES-1) investigation uses E. coli to better understand the decreased effectiveness of antibiotics during spaceflight. The study is set on the premise derived from previous investigations that suggest bacteria are able to grow in space even in an antibiotic concentration that would normally deter growth.

"We intend to further corroborate these early findings and conduct more in depth genetic assays of the returned samples to get a better understanding of what might be responsible for this outcome," said AES-1 principal investigator David Klaus, Ph.D., of BioServe Space Technologies at the University of Colorado in Boulder.

As bacteria grow more resistant to antibiotics, there are less effective pharmaceutical treatment options for people with bacterial infections. The findings from AES-1 may help improve antibiotic development
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Contact: Laura Niles
Laura.E.Niles@nasa.gov
281-244-7069
NASA/Johnson Space Center
Source:Eurekalert  

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