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5514592 |
Method and composition for testing blood for hemoglobin S that incorporates mineral oil as an insoluble upper phase
A method for testing blood for the presence of hemoglobin S wherein a blood sample is vigorously admixed with a two-phase test system for the purpose of determining the presence or absence of...
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5497652 |
Method and apparatus for evaluating quantities of absorbed impurities
A method and device for evaluating the quantities of adsorbed impurities in sample gas of ultra-high purity for various kinds of materials. After inert gas of ultra-high purity is supplied to a...
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5492673 |
Reagent system for calibration of pipettes and other volumetric measuring devices
A reagent system for accurately determining the volume of a pipette using a photometer is disclosed. The reagent system for use with the photometer includes a first container holding a reference...
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5478750 |
Methods for photometric analysis
The present invention provides a compact, highly automated photometric analyzer for measuring the concentration of substances found in a fluid, typically a blood sample or other body fluid sample...
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5478753 |
Positive calibrator/control composition for an IgM serology assay and an IgM serology assay
There is described a positive calibrator/control composition for use in assays for the detection of antibodies to infectious disease agents. The composition includes a composite antibody of a...
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5474892 |
Method for the stabilization of proteins using heat shock protein Hsp90
The present invention concerns a method for the stabilization of proteins in an aqueous solution which is characterized in that one or several members of the heat shock protein (Hsp90) family are...
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5470750 |
Detection of appendicitis by measurement of orthohydroxyhippuric acid
Appendicitis can be detected in human beings suspected of having appendicitis by determining a threshold level of 10 mg/liter of σ-hydroxyhippuric acid in the urine of such humans. This threshold...
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5455177 |
Method for analysis of a medical sample
A method for the analysis of a medical sample, particularly a body fluid, with the aid of an analyzing instrument, in which a test fluid, which contains an aliquot part of the sample and reagents,...
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5453377 |
Methods for making iodine-free Karl Fischer reagents
Various methods are described for producing volumetric one-component iodine-free Karl Fischer reagents useful for determining the water content of a sample, the reagents containing triiodide as the...
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5453378 |
Diagnostic test system verification method using serum free glucose control containing quaternary ammnonium polymer
Disclosed is a serum free control reagent formulation useful for the determination of a pre-selected analyte. The formulation involves an aqueous solution of a predetermined amount of the analyte...
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5447838 |
Protein-dye conjugate for confirmation of correct dilution of calibrators
The present invention has multiple aspects that include an intermediate composition (i.e., a marked stock calibrator solution) for preparing diluted calibrator solutions that are marked in...
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5438003 |
Reagent compositions for use in the identification and characterization of reticulocytes in whole blood
A reagent composition which includes organic cationic dyes for staining the reticulocytes in a blood sample and buffer solutions for maintaining a pH of about 6 to about 9 is provided. The dyes may...
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5436133 |
Enzyme assay of biochemical substances
This invention relates to an enzyme assay for quantitative analysis of biochemical substances using NAD(P)-NAD(P)H system and utilizing hydrogen peroxide, in which isocitric acid, metal ions and...
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5435171 |
Apparatus for automatically preparing solution of powdery product as specimen for use in viscosity measurement
An apparatus for supplying a solution of a powdery product as a specimen of viscosity measurement. The apparatus includes electronic discharge-weighing device (4) for determining the amount of the...
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5432089 |
Reference control for use with manual and flow cytometric reticulocyte counting devices
A stable reticulocyte reference control which may be used with both manual and flow cytometric reticulocyte counting devices is provided. The reference control contains erythrocytes loaded with...
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5427949 |
Biosynthetic cerebrospinal fluid control
The present invention relates to a biosynthetic cerebrospinal fluid control and method of use. Additionally, this invention relates to the isolation and purification of stable liquid human...
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5424211 |
Composition for detecting uranyl
A composition for detecting the presence and concentration of a substance such as uranyl, comprising an organohalide covalently bonded to an indicator for said substance. The composition has at...
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5422278 |
Blood gas/electrolyte calibrator and quality controls
Aqueous solutions containing buffers and electrolytes are adjusted to levels required for calibration of both blood gas analyzers and ion selective electrolyte analyzers. A control material,...
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5422277 |
Cell fixative composition and method of staining cells without destroying the cell surface
A cell fixative composition for fixing the internal components of a cell without disrupting the cell surface components is disclosed. The composition contains a compound for preserving...
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5420038 |
Calibration system and housing
A calibration system comprising a sensor cassette including at least one sensor to be calibrated and a housing having a liquid passage including a chamber. The housing is coupled to the sensor...
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5411891 |
Reagent compositions and their use in the identification and characterization of reticulocytes in whole blood
A reagent composition which include an organic cationic dye for staining the reticulocytes in the blood sample and a buffer solution for maintaining a pH of about 6 to about 9 is provided. The dyes...
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5409838 |
Use of acid to stabilize indicator dyes in acrylate adhesives
The present invention provides a culture device for growing microorganisms having a self supporting substrate coated with a cold-water soluble dry powder which is a mixture of gelling agents and...
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5401664 |
Analytical method for determining concentration of decomposition products in solvent used for solvent extraction
A safe analytical technique for determining the concentration amount of dibutyl and monobutyl phosphate degradation products in the TBP-dodecane solvent used in solvent extraction processes. This...
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5389547 |
Pretreating reagent, pretreatment method, assay with pretreated samples, assay kit and method of diagnosing infectious diseases
A reagent denatures or eliminates factors interfering with biochemical reactions by simple treatment without requiring separation of any denatured product precipitate. The reagent makes it possible...
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5385825 |
Composition for processing bodyfluids, method of processing bodyfluids and products made from bodyfluids
Disclosed is a composition useful in the processing of blood and cerebrospinal fluid to help maintain sample integrity for analytical testing. The composition generally includes a first enzyme...
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5380663 |
Automated system for performance analysis and fluorescence quantitation of samples
A system for rapid microbead calibration of a flow cytometer including a suspension of quantitative fluorescent microbead standards and analytical software. The software is used to take information...
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5378629 |
Wash composition for determination of microorganisms associated with periodontal diseases
An aqueous wash composition has been found useful in methods for determination of specific binding ligands. The composition is buffered to a pH of less than or equal to 6 or greater than or equal...
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5366895 |
Method for lysing liposomes using polyethyleneglycol monononylphenyl ethers
A method for rapidly lysing liposomes having transition temperatures in the range of 35° to 65° C. is provided. Such liposomes are treated with a surfactant including ##STR1## wherein x...
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5362627 |
Stabilization and reduction of background fluorescence of hydroxy coumarin ester enzyme substrates
Hydroxy coumarin ester enzyme substrates can be stored in a strong base at pH above 11 to stabilize the substrate against premature hydrolysis of the ester bond and to reduce the revel of...
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5360743 |
Method for measuring a sample sorption and a sample cell void volume and wall adsorption using an adsorbate gas
A sorption analyzer for performing surface measurement analysis on sample material. The sorption analyzer calibrates the instrument and the sample cell using the adsorbate gas.
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5348889 |
Method for correcting a calibration curve
An improved calibration method for calibrating the measured value of an analyte in a liquid sample by referring to a calibration curve drawn by plotting the interrelation between the calibration...
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5348706 |
Calibration system and method for making
An endless loop calibration system comprising a sensor cassette having a flow-through passage and at least one sensor to be calibrated, a chamber coupled to the sensor cassette to define an endless...
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5348852 |
Diagnostic and therapeutic compositions
Compositions, such as liquid therapeutic or diagnostic compositions, and methods for their preparation and involving their use. The compositions comprise an effective amount of gelatin from cold...
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5344779 |
Method for production of standard oxide sample for X-ray fluorescence spectrometry
A method for the production of a standard oxide sample for X-ray fluorescence analysis of an impurity element contained in an inorganic compound. The standard oxide sample is produced by accurately...
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5344782 |
Assay method for the determination of lithium with novel substituted crown dyes
Assay methods are provided for determining the presence of lithium in high sodium content liquids such as serum, plasma, urine or other sample without deproteinization. The novel compounds are...
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5338684 |
Stable aqueous FK506 standards
A stabilized, aqueous composition containing FK506. FK506 degrades rapidly in most aqueous matrices. The rate of degradation is decreased in the presence of unfixed blood cells or fragments of...
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5328826 |
Immunochemical detection of human uterine endometrial cancer cell
A method of screening for the endometrial cancer cells in a endometrial cell specimen is disclosed. The method involves determining the amount of an endometrial cancer associated antigen relative...
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5328848 |
Method for hydrating and calibrating a sterilizable fiber-optic catheter
The present invention provides an aqueous buffer solution and method and solution for hydrating and calibrating a sensor membrane of a fiber-optic catheter useful for measuring an analyte other...
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5324647 |
Fibrin coated polymer surfaces
Surfaces of polymeric materials are coated with a layer of thermally denatured fibrinogen. The fibrinogen may be treated with thrombin to produce fibrin, and additional fibrinogen and factor XIII...
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5324635 |
Method and apparatus for automatic measurement of fluorescence
An analyzer has a reaction disk for holding a plurality of reaction containers and a fluorophotometer for measuring fluorescence stemming from solutions in the containers. Most of the containers...
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5318910 |
Standard whole blood composition for determining the potency of blood clotting inhibitory substances
A standard whole blood composition is disclosed, which is useful as a pooled human hemostasis reference standard in blood coagulation assays including Activated Clotting Time (ACT), Whole Blood...
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5316908 |
Size markers for electrophoretic analysis of DNA
The present invention discloses a DNA marker ladder useful in Southern blot hybridizations. The ladder is made up of pooled DNA restriction endonuclease digests, where each restriction digest...
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5314824 |
Method of setting up a flow cytometer
A method of setting up a flow cytometer using microbeads fluorescing at a plurality of wavelengths, control cells for each of said wavelengths, certified blank microbeads. The blank microbeads are...
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5312755 |
Contrast resolution tissue mimicking phantoms for nuclear magnetic resonance imaging with stable NMR properties
Tissue mimicking phantoms for NMR imagers are produced having a base tissue mimicking material enclosed within a sealed container. The base tissue mimicking material is a gel solidified from a...
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5312756 |
Total organic carbon (TOC) and total inorganic carbon (TIC) calibration system
There are essentially three aspects to the present invention. In a first aspect, there is provided solid-phase calibration materials for selectively imparting predetermined inorganic or organic...
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5310679 |
Composition for reducing turbidity in samples of biological fluids
A composition which reduces the turbidity of samples of artificial or naturally occurring biological fluids comprising: a buffering agent; a nonionic surfactant; a lipolytic enzyme; and...
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5302510 |
DNA sizing control standards for electrophoretic analyses
The present invention is directed to a method for assessing the reliability of DNA sizing measurements performed on DNA samples. DNA sizing control standards are disclosed wherein each standard...
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5300424 |
Composition for preservation of diagnostic test reagents
The present invention is concerned with a combination for the preservation of diagnostic tests, characterized by a content of at least two components selected from the group comprising...
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5294553 |
Method for the gravimetric determination of oil and grease
A non-halogenated solvent mixture for gravimetric determination of grease and oil in an aqueous or a solid matrix comprising a mixture of n-hexane and methyl tertiary-butyl ether present in a...
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5293770 |
Calibration device for use in calibrating a sensor
In one embodiment the calibration device (1) comprises a housing (2) which by means of a removable lid (8) and a rupturable barrier layer (3) is divided into a calibration chamber (4) and a second...
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