A hollowing apparatus for preparation of meat patties for cooking includes a mold assembly and a press assembly. An end of life detection is achieved by conditioning a lamp feedback with a DC offset to provide a simple threshold comparison to determine if the lamp exceeds specified operational boundaries. The result may be an increase in the gain of the array. Therefore, the access transistor is in a DTMOS structure having the gate electrode connected with the body region through the contact, which in turn is also electrically connected to the body region of the driver transistor. The bracket sides, the yoke sides and the corner pieces forming airflow areas therein, and the bracket sides, the yoke sides, and the corners all have substantially the same width dimension, such that the yoke sides, the bracket sides and the corners have substantially equivalent average field flux density ratios. The compositions are especially useful in treating individuals afflicted with impaired glucose tolerance or diabetes.