ISS Crew Works With Science Experiments<br /><br />The Expedition 10 crew focussed on science experiments and medical<br />activities Tuesday aboard the International Space Station.<br /><br />Commander Leroy Chiao conducted another session with the Binary Colloid<br />Alloy Test 3, which is studying the long-term behavior of colloids -- fine<br />particles suspended in a fluid -- in a microgravity environment, where the<br />effects of sedimentation and convection are removed. Crewmembers will even<br />out the samples, photograph the growth and formations of the colloids, and<br />downlink the images for analysis. Meanwhile, Flight Engineer Salizhan<br />Sharipov participated in a Russian experiment that is studying the heart at<br />rest.<br /><br />Both crewmembers took part in routine medical assessments and recorded the<br />data.<br /><br />In other activities, the crew monitored ISS systems and continued<br />troubleshooting on a Russian navigation system.