But the big VR players are still working out motion tracking. When you look down with a VR headset on the first thing you want to do is see your hands in a virtual space. For a while, we've seen the Leap Motion accessory - which uses an infrared sensor to track hand movements - strapped to the front of Oculus dev kits.
Urine specimens should not remain unrefrigerated for longer than two hours. Aurine specimen that cannot be delivered to a laboratory within two hours should be stored in a refrigerator. The reason for this precaution is that urinesamples undergo chemical changes at room temperature.
For a routine urine analysis, a fresh (<1 hr old), clean-catch urine sample is acceptable. If the analysis. cannot be performed immediately, refrigerate the. sample. (When urine stands at room temperature for a. long period, casts and red blood cells undergo lysis, and the urine becomes alkalinized with precipitation. of salts.) 1. Pour 5â10 mL of well-mixed urine into a centrifuge.