Abstract: A proteolytic enzyme-containing composition is prepared having stabilized proteolytic enzyme activity and the ability to convert scleroproteins to water soluble products without racemization. The composition contains a proteolytic enzyme system from Bacillus cereus and an anionic detergent. The proteolytic enzyme system consists of a proteolytic enzyme oligomer that is retained by an ultrafilter membrane that retains molecules larger than 10,000 molecular weight and is reversibly interconvertible with a proteolytic active subcomponent that passes through the same membrane that retains the oligomer. The anionic detergent is preferably an alkyl sulfate or sulfonate or an alkyl-aryl sulfate or sulfonate.

Abstract: Non-woven articles, including garments and porous sheet materials, are made from continuous filaments by ejecting continuous yarn or filaments into turbulent air and contacting them with binder in a high density fog while still suspended in air, so that the binder dries sufficiently to become non-migrating before the yarn is deposited on the screen or mold on which the fibers are brought into contact with each other and bonding takes place. This method is particularly suitable for making garments of elastomeric fibers, not easily handled in ordinary production machinery. Another generally applicable advantage is that the resultant products are exceptionally flexible and that the articles produced do not split into stratified binder-rich and-poor areas, but are uniformly bonded throughout.

Abstract: Fibers composed of mixtures of refractory metal oxides, other than silica, are treated by a process involving a drawing step to markedly increase the modulus of elasticity of the fibers. The compositions of the fibers to which the process is applied are typically mixtures of refractory vitreous metal oxides such as calcia, alumina, verylia and the like which are devoid or nearly devoid of silica or other network formers but may be a single such oxide mixed with no more than small or insignificant amounts of such other oxides.

Abstract: A high proportion of inexpensive materials are utilized to provide a low-cost heating element in panel form having a resistivity of 10.sup.-.sup.3 to 10.sup.3 ohm-centimeters which may be operated in the ambient atmosphere as or in a wall, ceiling or floor of a heating or warming oven or a room of a human residence and which may be contacted by humans without receiving an electric shock or thermal burn.The composition comprises iron particles or iron filings and inexpensive material such as bottle glass or such waste material as glass from re-cycled bottles.