Abstract: A colored compound containing a cationic group and a cellulose reactive group, especially a compound of the formula:A--Y--B IY'--B IIwhereinA is the cationic group;Y is a chromophore;Y' is a cationic chromophoreandB is the reactive group, which is suitable for the preparation of a protein adsorbent or precipitant for use in the separation of mixtures of proteins.

Abstract: Tire protective or traction chain comprising a network of wearing plates 14 substantially perpendicular to the surface of a tire and connectors 12 substantially parallel to the surface of the tire interconnecting the wearing plates. Each wearing plate on the tread portion of tire comprises an assembly of multiple plates 16 that are relatively thin and that together form a wearing plate assembly of the required thickness. Alternate plates of an assembly may be of different heights or have sloping ground engaging edges arranged opposite to one another for increased traction.

Abstract: Apparatus and method for molding generally cubical building modules of concrete, the apparatus comprising both internal and external movable mounted molding components and preferably including mechanisms for advancing the components into molding positions and for withdrawing the components from the molding position upon completion of the molding of a module. The method involves the use of such molding components and contemplates certain sequences in the advancement and withdrawal of the molding components for different portions of the modules.