Abstract: A composite sheet including at least a textile structure and a polyetherimide (PEI), the latter impregnating and densifying the textile structure, the sheet having a porosity of between approximately 3% and approximately 8% by mass of acetone sorption, and preferably between approximately 4% and approximately 5%, as measured by the acetone uptake method; the manufacturing method including continuous or semi-continuous molding; the sheet being used inter alia as a skin of a foamed structure made from PEI.

Abstract: A composite sheet including at least a textile structure and a polyetherimide (PEI), the latter impregnating and densifying the textile structure, the sheet having a porosity of between approximately 3% and approximately 8% by mass of acetone sorption, and preferably between approximately 4% and approximately 5%, as measured by the acetone uptake method; the manufacturing method including continuous or semi-continuous molding; the sheet being used inter alia as a skin of a foamed structure made from PEI.

Abstract: The invention relates to a protein cross-linking agent of the formula, where R1 is an aryl group optionally substituted once or several times by a grouping selected from the group consisting of hydroxy, C1-C4 alkyl, OBoc, SO3Na, Deu, and C1-C4 alkoxy groupings, R2 is N, (III), or (IV), n and in are identical or different integers between 0 and 10, p is an integer between 0 and 5, k is 0, 1, 2 or 3, and X and X? are identical or different and are a reactive function of the proteins. The invention also relates to a method for the structural analysis of a protein or a protein complex.