Abstract: A picture display device includes an envelope having a faceplate, having an inner surface formed with a phosphor screen, and a back covering coupled to the faceplate to define an evacuated chamber; filament-like cathode electrodes and electron beam control electrodes disposed within the evacuated chamber for emitting electron beams towards the phosphor screen; a cathode electrode support member for retaining the cathode electrodes and having one of opposite surfaces held in contact therewith; a shape retention plate for retaining at least the cathode electrodes and the support member in a predetermined curved shape; a plurality of support struts for fixing the shape retention plate in a face-to-face relationship with the phosphor screen; and a reinforcement grid structure disposed in contact with a surface of the shape retention plate opposite that facing the phosphor screen so as to follow the curvature of the shape retention plate.

Abstract: Reagent for the measurement of direct bilirubin comprising a buffer solution having a pH range of 3.5 to 4.5 which contains bilirubin oxidase, preferably in the form of a test kit consisting essentially of (i) a buffer solution having a pH range of 3.5 to 4.5, (ii-a) a lyophilized bilirubin oxidase, (ii-b) a buffer solution for dissolving the lyophilized bilirubin oxidase, and (iii) a standard serum containing a prescribed amount of bilirubin, and a method for measurement of direct bilirubin by using the reagent. The reagent and method are useful for diagnosis of various diseases, for example, various hepatic diseases (e.g. jaundice) and cholepathia.