Thyroid Hormone Tests. Test Overview. Thyroid hormone tests are blood tests that check how well the thyroid gland is working. The thyroid gland makes hormones that regulate the way the body uses energy. The thyroid gland is a butterfly-shaped gland that lies in front of your windpipe (trachea), just below your voice box (larynx).
A clean room (or cleanroom) is an enclosed space in which airborne particulates, contaminants, and pollutants are kept within strict limits. In industry, clean rooms are used in the manufacture and...
The concept behind a cleanroom is to push air into the room from the top (green. arrows), down into the room, and then out vents at the floor level (blue arrows), carrying wth it any contaminants from the manufacturing process. ISO Class 4 = Federal standard Class 10.