Abstract:
The present invention provides an analytical test strip for the detection of protein in a biological sample including a novel combination of protein error indicators. The invention includes, in combination, a partially halogenated phenolsulfonephthalein protein error indicator having nitro or nitroso substituent groups in the B and/or C rings and a merocyanine protein error indicator.
Abstract:
A method for preparing an important stereo-specific intermediate in the synthesis of prostaglandin analogs is disclosed. Said intermediate is (+)S-2-hydroxy-2-methyl-hexanoic acid and is prepared via an asymmetric halolactonization reaction utilizing L-proline as the chiral agent.
Abstract:
A novel compound useful in detecting leukocytes, esterase and protease in a test sample. The compound has the structure ##STR1## in which: A is an acid residue, R is lower alkyl, aryl, carboxyl, carboxyl ester, amido or cyano, R* is H or lower alkyl, and X is O, S, or NR', in which R' is H, lower alkyl or aryl.
Abstract:
A compound of the formula (I) wherein R1 is a protecting group for N&agr;, R2 is a protecting group for NG, and R3 is aryl, and wherein the compound of formula (I) is a trypsin substrate such that trypsin cleaves the O—C single bond, which liberates R3—OH; a diagnostic device comprising same; a method for preparing the diagnostic device; and a method of using the diagnostic device to detect levels of urinary trypsin inhibitor in a biological sample; and a diagnostic kit for detecting levels of urinary trypsin inhibitor in a biological sample.
Abstract:
The present test device provides a merocyanine protein error indicator compound. Merocyanine compounds are a new class of protein error indicators, providing an analytical tool useful in the detection of protein in a sample.
Abstract:
Chromogenic merocyanine enzyme substrate compounds of the general formula: ##STR1## where Y is an enzymatically-cleavable group such as a radical of a sugar, carboxylic acid, amino acid, peptide, phosphoric acid, or sulfuric acid; A and B represent residues that complete 5- or 6-membered ring systems; R.sup.1 is substituted or unsubstituted alkyl; R.sup.2 and R.sup.3, independently, are hydrogen or lower alkyl; m, n, and p, which can be different, are integers from 0 through 3 provided that m+n+p must be at least 2; and X is an appropriate counterion (anion).
Abstract:
Disclosed is an improved electrode suitable for the electrochemical regeneration of the co-enzymes NADH and NADPH. The electrode has imparted on its surface a mediator function which is a 3-phenylimino-3H-phenothiazine or a 3-phenylimino-3H-phenoxazine. Also disclosed is a method of improving the performance of a biochemical fuel cell which operates with a dehydrogenase as a catalyst and a co-enzyme as the energy-transferring redox couple which involves using the improved electrode in the fuel cell.
Abstract:
Disclosed is an electrode suitable for the electrochemical regeneration of the co-enzymes NADH and NADPH. The electrode has imparted on its surface a mediator function which is a 3-methylene-3H-phenothiazine or a 3-methylene-3H-phenoxazine compound.
Abstract:
Disclosed is the use of 9H-acridin-2-one and 11H-dibenz-[b,f][1,4]oxazepin-8-one compounds as mediators suitable for the electrochemical regeneration of the co-enzymes dihydronicotinamide adenine dinucleotide (NADH), dihydronicotinamide adenine dinucleotide phosphate (NADPH) or analogs thereof.