Disclosed herein are cell cultures comprising definitive endoderm cells and methods of producing the same. Preventing a carry from arising at more than one bit can minimize skipping of delay time if a metastable state should occur. A polyphase power converter with distributed energy stores is therefore operated with redundancy. An insulating layer is disposed adjacent said first and said second sourcedrain regions and said channel region, serving as the insulating material of the SOI device. The different heights of the relief copy of the transparent mold will cause the light to diffractrefract to form a corresponding patterned etching in the photoresist plate. The first resistor arrangement is coupled between the source of negative voltage and the signal output of the safety notification system.