Prepolymer composition which comprises 10 to 95% by weight of a first isocyanate-group-containing prepolymer (A) obtained by reacting an excess equivalent of an aromatic diisocyanate (c) containing an isocyanate group directly bonded to the aromatic nucleus with an oxyethylene-group-containing polyoxyalkylene polyol (a) of a relatively high molecular weight; 90 to 5% by weight of a second isocyanate-group-containing prepolymer (B) obtained by reacting an excess equivalent of an organic diisocyan...

It is possible with the aid of a .gamma.-glutamyltranspeptidase, which can be prepared by fermentation, to hydrolyze adipinyl- or glutaryl-monoamino compounds, in particular .alpha.-keto-adipinyl- or glutaryl-7-aminocephalosporanic acid.

A wall structure and a method for producing the wall structure. The wall ucture is comprised of substantially standardized building elements which, one preferred embodiment, interlocks with adjacent elements along both the top and bottom and the vertical side surfaces. The surfaces of the building elements forming the interior and exterior surfaces of the finished wall are preferably reinforced along one such surface thereof. During the formation of the wall structure, horizontally and verticall...

A separation medium in macroporous gel form is disclosed which is obtainable by cooling an aqueous solution of at least one gel forming polymer to a temperature, at which the solvent in the system is partially frozen with the dissolved substances concentrated in the non-frozen fraction of the solvent, said gel forming polymer being selected from the group consisting of polymers normally forming gels too fast when an aqueous solution thereof is cooled to a temperature within a range below 0.degre...

Trichlorotrimellitic anhydride, a new composition of matter, is prepared by chlorination of 2,6-naphthalene dicarboxylic acid in oleum in the presence of an iodine catalyst.

High silica content optical glasses, containing more volatile oxides such as GeO.sub.2 and B.sub.2 O.sub.3, are produced by plasma fusion of powders without inordinately high loss of the more volatile constituents. The powders are produced by a process including the heat treatment of intimately mixed materials, which include the glass forming constituents. Small quantities of GeO.sub.2 are included in borosilicate glass to suppress bubble formation. Pairs of glass compositions have been found, w...

The invention discloses the forming of at least the toe portion of a shoe upper bottom margin prior to the placing of the upper onto a shoe form for the lasting. A new structure of a shoe upper and of the devices for its manufacture are also disclosed.

The specification discloses a new chemical substance designated as oxamicetin and a process for preparing the substance by cultivation of a strain of Arthrobacter named Arthrobacter oxamicetus. Oxamicetus has been shown to have antibiotic activity against both Gram-positive and Gram-negative organisms.

A new deoxyribonuclease (DNase) having preservability and high temperature stability is provided by cultivating a new strain M-26 of the genus Bacillus in an alkaline culture medium. The DNase has such a specificity that it very selectively cleaves phosphodiester bonds between deoxyguanosine and deoxyguanosine in a molecule of deoxyribonucleic acid (DNA) while leaving phosphate groups at the 5'-position.

Biodegradeable surface-active material, which when formulated into cleansing, e.g., detergent, compositions provides improved cleansing properties over conventional dispersing or cleansing agents, is obtained by forming esterifying an unsaturated polycarboxylic acid material or the corresponding sulfo-acid material with a mono- or poly-hydroxy containing non-ionic surfactant, and converting the resulting ester(or sulfo-ester), to the corresponding sulfonate salt, e.g. sodium sulforate salt, wher...