摘要:
The detection and determination of (a) hydrogen peroxide or of a substance which reacts with the formation of hydrogen peroxide or (b) of peroxidase or a peroxidatively active substance, is carried out by contacting an unknown sample with a chromogen and, in case (a), with a peroxidatively active substance or in case (b) with hydrogen peroxide or a substance which reacts with the formation of hydrogen peroxide, and evaluating the coloration produced by the reaction, wherein, as the chromogen, there is used at least one 3,3',5,5'-tetraalkylbenzidine compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which can be the same or different, are straight-chained or branched alkyl radicals containing up to 6 and preferably up to 4 carbon atoms.
摘要:
Novel 3-aminocarbazole compounds of the formula: ##SPC1##WhereinX is hydrogen or halogen,Y is oxygen or represents two hydrogen atoms; andR.sub.1 and R.sub.2, which can be the same or different, are hydrogen, lower alkyl or hydroxyalkyl or amino; andN is 1 or 2, with the proviso that when n is2, X, Y, R.sub.1 and R.sub.2 cannot all be hydrogen atoms, as well as the salts thereof with inorganic and organic acids; are outstandingly effective indicators for the determination of glucose and provide stable compositions for such glucose determination.
摘要:
Novel 3-aminocarbazole compounds of the formula: ##SPC1##WhereinX is hydrogen or halogen,Y is oxygen or represents two hydrogen atoms; andR.sub.1 and R.sub.2, which can be the same or different, are hydrogen, lower alkyl or hydroxyalkyl or amino; andn is 1 or 2, with the proviso that when n is 2, X, Y, R.sub.1 and R.sub.2 cannot all be hydrogen atoms,As well as the salts thereof with inorganic and organic acids; are outstandingly effective indicators for the determination of glucose and provide stable compositions for such glucose determination.
摘要:
9-(.gamma.-AMINOPROPYL)-3-AMINOCARBAZOLE, WHEN INCORPORATED INTO INDICATOR COMPOSITIONS ALSO COMPRISING OXIDATION INDICATORS SUCH AS O-TOLIDINE FOR THE ENZYMATIC DETECTION OF GLUCOSE, RESULTS IN OUTSTANDINGLY STABLE INDICATOR COMPOSITIONS AND NOT ADVERSELY EFFECTED BY NORMALLY INTERFERING COMPONENTS IN THE TEST SAMPLE.
摘要:
A diagnostic agent for the detection of occult blood in feces comprising hydrogen peroxide and, as a chromogen, guaiaconic acid A, optionally with a stabilizer. The invention provides, as a novel substance, guaiaconic acid A having a specific extinction E.sub.1 cm.sup.1% at 600 nm of at least 200, determined by the reaction with peroxidase and hydrogen peroxide, having infra-red bands at1600 cm.sup.-1 (m);1505 cm.sup.-1 (v.s.);1260 cm.sup.-1 (s;b);1115 cm.sup.-1 (m);1025 cm.sup.-1 (m); and1200 cm.sup.-1 (s;b)and having an R.sub.F value of 0.45 (toluene/dioxan/glacial acetic acid; 90:25:10 v/v/v).
摘要:
Bis-(2,4-dinitrophenyl)-methylpyridinium compounds useful as a pH indicator or for the detection of ammonia having the formula: ##STR1## wherein one of R.sub.1 and R.sub.2 is a bis-(2,4-dinitrophenyl)-methyl radical and the other is a lower alkyl radical;R.sub.2 can also be hydrogen atom or trifluoromethyl;R.sub.3 and R.sub.4 are hydrogen or, together with the carbon atoms to which they are attached, represent a benzene ring; andX.sup..crclbar. is an appropriate acid anionor said compounds are betaines.
摘要:
Protein in body fluids, e.g., urine, is detected by contacting a sample of the body fluid with a diagnostic agent comprising an absorbent carrier impregnated with a pH indicator of the octahalosulfophthalein group, a buffer, and at least one linear or branched chain polypropylene glycol immiscible with water; the resulting test papers are highly sensitive to protein without being subject to interfering effects by nitrogen-containing compounds.
摘要:
The invention provides a diagnostic agent for the detection of occult blood in feces comprising hydrogen peroxide and, as a chromogen, guaiaconic acid A, optionally with a stabilizer. The invention provides, as a novel substance, guaiaconic acid A having a specific extinction E.sub.1 cm.sup.1% at 600 nm of at least 200, determined by the reaction with peroxidase and hydrogen peroxide, having infra-red bands at1600 cm.sup.-1 (m);1505 cm.sup.-1 (v.s.);1206 cm.sup.-1 (s;b);1115 cm.sup.-1 (m);1025 cm.sup.-1 (m); and1200 cm.sup.-1 (s;b)and having an R.sub.F value of 0.45 (toluene/dioxan/glacial acetic acid; 90:25:10 v/v/v).
摘要:
Protein in body fluids, e.g., urine, is detected by contacting a sample of the body fluid with a diagnostic agent comprising an absorbent carrier impregnated with a pH indicator of the octahalosulfophthalein group, a buffer, and at least one linear or branched chain polypropylene glycol immiscible with water; the resulting test papers are highly sensitive to protein without being subject to interfering effects by nitrogen-containing compounds.
摘要:
The present invention provides a diagnostic agent for the detection of proteolytic enzymes, comprising an absorbent carrier, a film layer, a powder mixture, a lyophilisate, a solution or a reagent tablet, containing at least one chromogen and an appropriate buffer substance, wherein the chromogen used is an indoxyl- and/or thioindoxyl-amino acid ester and/or peptide ester of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which can be the same or different, are hydrogen or halogen atoms, lower alkyl, lower alkoxy, aryl, aralkyl, aralkoxy, hydroxyl, carboxy, carboxy lower alkoxy, aralkoxycarbonyl, aralkyloxycarbonyl lower alkoxy, nitro or lower acylamino radicals, whereby two adjacent substituents can also represent an optionally halogenated fused benzene ring, X is a sulphur atom or an imino group optionally substituted by a lower alkyl, aryl, aralkyl or acyl radical, A is an amino acid or peptide residue and B is a nitrogen protective group conventional in peptide chemistry or derived therefrom.The present invention also provides new compounds of the above-given general formula and processes for the preparation thereof.Furthermore, the present invention is concerned with the use of the compounds of the above-given general formula for the production of diagnostic agents for the detection of proteolytic enzymes.