1 Add 10 drops of Benedicts solution to each test tube. 2  Place the test tubes in the hot-water bath. Heat the test tubes for 3 to 5 minutes, or until the indicator changes color, if it changes color.  With a test tube holder, remove the tubes from the hot-water bath and place them back in the test tube rack.
Prostate Ultrasound. Prostate Ultrasound. Definition. A prostate ultrasound is a diagnostic test used to detect potential problems with a man's prostate. An ultrasound test uses very high frequency sound waves that are passed through the body. The pattern of reflected sound waves, or echoes, shows the outline of the prostate.
An ultrasound scan is a medical test that uses high-frequency sound waves to capture live images from the inside of your body. The technology is similar to that used by sonar and radar, which help the military detect planes and ships. An ultrasound allows your doctor to see problems with organs, vessels, and tissuesâwithout needing to make an incision. Unlike other imaging techniques, ultrasound uses no radiation, so it is the preferred method for viewing a developing fetus during pregnancy.