Metric fasteners are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimeters (measured along the length of the fastener). For example a thread pitch of 1.5 means that the distance between one thread and the next is 1.5mm. In general smaller fasteners have finer thread so they have lower thread pitch.
Albinism can be diagnosed merely by observation of major or total absence of pigmentation of the skin, hair and eyes. Other tests to diagnose albinism include -. Genetic Testing -. Genetic testing is the most accurate way to diagnose albinism and its specific type.
The Test. How is it used? The direct antiglobulin test (DAT), also known as the direct Coombs test, is used primarily to help determine whether the cause of hemolytic anemia, a condition in which red blood cells (RBCs) are destroyed more quickly than they can be replaced, is due to antibodies attached to RBCs.