Abstract: The invention concerns monoclonal antibodies against a complex of human ACT and a serine protease, preferably against a ACT-PSA, which have essentially no cross-reactivity with free, non-complexed human ACT and with free, non-complexed PSA, as well as diagnostic test methods for detecting serine protease-ACT complexes, in particular PSA-ACT, using these monoclonal antibodies.

Abstract: The invention concerns monoclonal antibodies against a complex of human ACT and a serine protease, preferably against a ACT-PSA, which have essentially no cross-reactivity with free, non-complexed human ACT and with free, non-complexed PSA, as well as diagnostic test methods for detecting serine protease-ACT complexes, in particular PSA-ACT, using these monoclonal antibodies.

Abstract: For the determination of an immunologically detectable substance based on a heterogeneous immunoassay by use of a solid phase on which one of the immunologically active reaction components is bound, a reaction vessel is used as the solid phase on the inner surface of which streptavidin or avidin is bound in such an amount that 0.1 to 2.5 .mu.g are present per ml reaction volume.A suitable reaction vessel for this has optically transparent wall areas which face one another and has avidin or streptavidin coated walls which are at least partially within the inner wall region intended as a receptacle for liquid, wherein the inner space of the container intended as a receptacle for liquid and the respective streptavidin or avidin content of the coating are so matched that 0.1 to 2.5 .mu.g streptavidin or avidin are present per ml reaction volume.

Abstract: An analysis element for the determination of an analyte in a liquid sample, especially for medicinal uses. A carrier layer (2) contains, in a reagent domain (4), a reagent applied in a defined pattern by an ink-jet process. The pattern comprises several sets (A, B, C) of compartments (11-20), the compartments (e.g. 11, 13, 15, 17, 19) of the same set (e.g. A) having the same chemical composition, the compartments (11, 13, 15, 17, 19 or 12, 16, 20) of different sets (A or B) containing different reagents and the compartments of different sets being arranged in alteration so that the compartments containing different reagents are close together but nevertheless spatially separated.

Abstract: For the determination of an immunologically detectable substance based on a heterogeneous immunoassay by use of a solid phase on which one of the immunologically active reaction components is bound, a reaction vessel is used as the solid phase on the inner surface of which streptavidin or avidin is bound in such an amount that 0.1 to 2.5 .mu.g are present per ml reaction volume.A suitable reaction vessel for this has optically transparent wall areas which face one another and has avidin or streptavidin coated walls which are at least partially within the inner wall region intended as a receptacle for liquid, wherein the inner space of the container intended as a receptacle for liquid and the respective streptavidin or avidin content of the coating are so matched that 0.1 to 2.5 .mu.g streptavidin or avidin are present per ml reaction volume.

Abstract: A method for the metered application of a biochemical analytical liquid to a target, wherein the liquid is ejected in small quantities on to the target through a jet from a jet chamber by a procedure in which a partial volume of the liquid in the jet chamber is evaporated and expanded for a short time whenever a quantity of the liquid is to be ejected. The invention further relates to a device with a disposable jet element which contains prepackaged analytical liquid.

Abstract: To produce a solid phase coated with an immunologically active substance, a carrier material is absorptively coated with a mixture of an immunologically active substance and a compound which contains at least two functional groups which can be photoactivated and at least one moiety which interacts with the carrier material and the immunologically active substance and it is subsequently irradiated for the cross-linkage.

Abstract: The present invention provides a method for the determination of a component of an immune reaction in a plasma sample using an immunoassay at a temperature of from 15.degree. to 40.degree. C., where one of the reactive components is in solid phase. The invention involves adding an amount of plasminogen activator sufficient to eliminate interference by fibrinogen with the component to be determined.

Abstract: The present invention provides a process for the preparation of a specifically bindable protein substance bound to an insoluble carrier material, especially for use in a heterogeneous analysis process, wherein a soluable protein with a molecular weight above about 500,000, which is more hydrophobic than the specifically bindable substance, is coupled to the specifically bindable substance and then the conjugate of reaction component and protein is adsorbed on a hydrophobic solid phase.The present invention also provides a carrier material for use in solid phase immunoassays including a hydrophobic solid phase which is adsorbed on a conjugate of a hydrophobic protein with a molecular weight above about 500,000 and of a specifically bindable protein or protein containing substance.

Abstract: The present invention provides an aqueous cholesterol standard solution with a definite content of cholesterol, wherein it contains a detergent mixture of 10 to 90% of cholic acid and 90 to 10% of desoxycholic acid or of appropriate salts or derivatives of these acids.The present invention also provides a process for the preparation of this aqueous cholesterol standard solution, wherein a detergent mixture of cholic acid and desoxycholic acid or of appropriate salts and derivatives of these acids is dissolved in distilled water or in 0.9% aqueous sodium chloride solution, an appropriate preservation agent and/or a buffer effective in the pH range of from 7 to 9 optionally added thereto, and a definite, precisely defined amount of cholesterol is dissolved in the solution thus obtained, while stirring and warming to 40.degree. to 60.degree. C.

Abstract: The present invention provides 1-methylhydantoinase, which hydrolyses 1-methylhydantoin in the presence of a nucleoside triphosphate and of polyvalent metal ions.The present invention also provides a process for obtaining 1-methylhydantoinase and a reagent containing it.Furthermore, the present invention provides a process for the determination of creatinine by the conversion of the creatinine with creatinine deiminase (E.C. 3.5.4.21) into 1-methylhydantoin, hydrolysis of the latter with the 1-methylhydantoinase in the presence of nucleoside triphosphate and of polyvalent metal ions and determination(a) of the hydrolysis product formed from 1-methylhydantoin with N-carbamoylsarcosinamidohydrolase with formation of sarcosine and detection of the sarcosine with sarcosine oxidase or sarcosine dehydrogenase or(b) of the simultaneously formed nucleoside diphosphate.

Abstract: The present invention provides a process for stabilizing the activity of peroxidase in solution by the addition of a specific activity stabilizer, wherein, to the enzyme present in solid or dissolved form, when the peroxidase is used as a conjugate with an immunologically effective substance, there is added, as activity stabilizer, aminopyrine in an amount of from 0.0005 to 2% by weight, referred to the solution.

Abstract: The present invention provides a process for the determination of the hemoglobin-haptoglobin complex in the presence of free hemoglobin by utilization of the different peroxidate properties of free and of bound hemoglobin, wherein, for the selective inhibition of the peroxidase activity of the free hemoglobin, a detergent is added and the residual peroxidate activity of the reaction mixture is measured.The present invention also provides a reagent for carrying out this process wherein, besides the substances required for the determination of the peroxidase activity, it contains a detergent for the inhibition of the peroxidase activity of free hemoglobin.Furthermore, the present invention provides a process for determining the haptoglobin content of a sample, as well as a process for determining glycosilated hemoglobin in a sample.

Abstract: The present invention provides a process for the determination of N-carbamoylsarcosine, wherein a sample solution containing N-carbamoylsarcosine is reacted with N-carbamoylsarcosine-amidohydrolase to give sarcosine, which is then determined.The present invention also provides the enzyme N-carbamoylsarcosine-amidohydrolase, a process for obtaining it and a reagent containing it.

Abstract: The present invention provides a process for the determination of cholesterol in free or bound form by means of cholesterol oxidase and optionally of cholesterol esterase by measurement of the oxygen consumption, of the hydrogen peroxide formed or of the cholestenone formed, wherein the determination is carried out kinetically with the use of a cholesterol oxidase which has been obtained from a micro-organism of the genus Streptomyces and with the addition of 3,4-dichlorophenol.The present invention also provides a reagent for the kinetic determination of cholesterol, comprising cholesterol oxidase and a system for the determination of hydrogen peroxide or of cholestenone and optionally cholesterol esterase, wherein it additionally contains 3,4-dichlorophenol and the cholesterol oxidase used originates from a micro-organism of the genus Streptomyces.

Abstract: A process for the determination of glycosilated hemoglobin in a blood sample comprises liberating glycosilated and non-glycosilated hemoglobin from the erythrocytes by chemical or physical treatment; converting, if desired, the hemoglobin into methemoglobin, and thereafter differentiating the glycosilated and non-glycosilated hemoglobin portion using its reaction with haptoglobin, and determining the glycosilated and/or the non-glycosilated hemoglobin portion.The present invention also provides a reagent for the determination of glycosilated hemoglobin in a blood sample, as well as a reagent for the differentiation of glycosilated and non-glycosilated hemoglobin, comprising haptoglobin.

Abstract: The present invention provides a process for the determination of an antibody by incubation with three different reagents R.sub.1, R.sub.2 and R.sub.3, of which R.sub. and R.sub.3 are present in liquid phase and are bindable with the antibody, R.sub.2 is present bound to a solid phase and is bindable with R.sub.1 and R.sub.3 carries a label, separation of the solid phase from the liquid phase and measurement of the label in the solid phase, wherein as R.sub.1 there is used a conjugate of a substance specifically recognized by the antibody to be determined and a reaction component of a specific binding system, as R.sub.3 there is used a conjugate of a substance specifically recognized by the antibody to be determined and a label and as R.sub.2 there used the other binding component of the specific binding system. The present invention also provides a composition for the determination of an antibody, wherein it contains two different soluble reagents R.sub.1 and R.sub.