Compositions suitable for use as a frying fat or oil may be derived from palm oil by a process comprising interesterification and comprise triglycerides. This composition can be formed into laser-engraveable layers for various elements that can be laser-engraved to provide relief images. The gas laser medium flows at a high speed in the circulating path. Furthermore, the analysis system has a means for moving the electrical contact element to the electrical contact surface of an analytical test element when the test element holder is in the measurement position. The butt portion is coupled to a main portion of the stock member such that the butt portion is selectively positionable with respect to the main portion of the stock member. By employing these radiological techniques in conjunction with the compositions of the present invention, the diagnosis and assessment of the progression of Alzheimer’s disease may be achieved.