Abstract: The invention relates to a compound having the general Formula I in which one of the groups R.sub.1,R.sub.2,R.sub.3,R.sub.4,R.sub.5,R.sub.6 and R.sub.7 represents an ionophoric moiety and the remaining groups each independently are hydrogen, a lipophilic or hydrophilic group or a reactive group for coupling to a polymer or a biomolecule, or R.sub.2 forms an aromatic ring system together with R.sub.3 and R.sub.5 forms an aromatic ring system together with R.sub.6.the compound of the invention is useful as a luminescence indicator for cations.

Abstract: The invention relates to a compound having the general Formula I ##STR1## in which one of the groups R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 represents an ionophoric moiety and the remaining groups each independently are hydrogen, a lipophilic or hydrophilic group or a reactive group for coupling to a polymer or a biomolecule, or R.sub.2 forms an aromatic ring system together with R.sub.3 and R.sub.5 forms an aromatic ring system together with R.sub.6.The compound of the invention is useful as a luminescence indicator for alkali ions.

Abstract: Water-soluble formaldehyde-free polycondensation products based on amino-s-triazines with at least two amino groups and glyoxylic acid, which contain as further component at least one amino compound and where the molar ratio of amino-s-triazine to glyoxylic acid to amino compound is 1:0.5 to 6.0:0.1 to 2.0. These polycondensation products are excellently suited as additives for aqueous suspensions of inorganic binders, especially cement, lime and gypsum. Building material mixtures which contain these polycondensation products remain workable for a considerably longer time and, in spite of this, also set more quickly.

Abstract: A three-dimensional puzzle assembled from puzzle pieces having a succession of rectilinear, curved, or rectilinear and curved segments that cooperate with other assembling and immobilization means used to assemble the puzzle. The assembling and the immobilization means are disposed upon each segment and comprise a contact edge with a flat portion that contacts the flat portion of an adjacent puzzle piece when assembled, at least one lateral extension which forms an overlapping shoulder with the contact edge and a connecting tab located at the extremity of the lateral extension that snaps into a receptor opening of an adjacent puzzle piece when assembled.

Abstract: Disclosed is a soluble polycondensation product based on amino-s-triazines with at least two amino groups and forma ehyde, a process for making the product and the use thereof as an additive for an aqueous binding agent suspension.

Abstract: A method and apparatus for determining fatigue/surface crack features on metal surfaces is disclosed wherein the cracks may be empty, filled, or covered with a dielectric (e.g., paint). The present invention includes a microwave waveguide having an aperture for scanning over a surface and thereby characterizing changes in a standing wave within the waveguide when a crack is scanned. In particular, crack related data resulting from standing wave perturbations can be analyzed for determining crack geometric features such as crack width, crack depth, crack length and crack tips. These features are determinable with high precision in comparison to the size of the aperture. When locating and/or sizing the geometric features of a crack, voltage changes induced by higher order modes generated by various orientations of the crack in relation to the aperture are utilized for generating the crack related data.

Abstract: Nonporous polymer beads having an average diameter of about 1-100 microns are suitable for chromatographic separation of mixtures of nucleic acids when the polymer beads are alkylated with alkyl chains having at least three carbon atoms. The polymer beads provide efficient separation of nucleic acids using ion-pair reverse phase chromatography.

Abstract: A plastic leaf spring with spring-eyes at the spring-ends has a spring-eye section (1) or a spring-eye body (15, 28) of fiber-reinforced plastic, with the spring-eye section (1) integrated in the leaf spring body or the spring-eye body (15, 28) manufactured separately from it. The spring-eye section (1) or spring-eye body (15, 28) each contain a layer (2, 16, 29) of essentially constant thickness with a center section (4, 18, 31) wrapping the spring-eye opening, and two connecting sections (3, 17, 32) appropriately essentially parallel to each other, with the outside surface of the layer (2, 16, 29) forming a hollow groove (13, 24, 33) at least one transition between the center section (4, 18, 31) and the connecting sections (3, 17, 32).