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International Space Station Expedition 13 Science Operations Status Report for the Week Ending June 30, 2006
Steve Roy
Marshall Space Flight Center, Huntsville, Ala.
(Phone: 256.544.0034)

Status report: 06-084

Expedition 13 NASA Science Officer Jeffrey Williams and Commander Pavel Vinogradov completed their mid-mission session with the Renal Stone experiment by collecting urine samples and logging all of their food and drinks consumed over a three-day period.

Three times during their expedition, they fill out diet logs and collect urine samples for analysis. Crewmembers are taking either potassium citrate or a placebo. This experiment will provide valuable information on whether this proven remedy on Earth can be used to reduce the risk of kidney stone formation for crewmembers in space.

Crews in space are at risk for kidney stones linked to their loss of bone mass density. Increased blood calcium, probably released from the bones, increases the risk of forming kidney stones.

NASA's payload operations team at the Marshall Center coordinates U.S. science activities on space station.