Abstract:
Biological fluid samples are deposited by methods that produce a uniform layer of the sample over a reagent-containing surface. In one embodiment, a nozzle having multiple openings is used to deposit a sample over the reagent-containing surface simultaneously. In an alternative embodiment, single droplets of the sample are deposited in a pattern on the surface, preferably in a sequence of parallel lines. The reaction between the biological sample and the reagents is read from a spectrographic image of the reagent-containing surface obtained by optical methods.
Abstract:
A microliter liquid sample, particularly a biological sample, is analyzed in a device employing centrifugal and capillary forces. The sample is moved by capillary forces into one or more metering wells which define the amount of the sample to be analyzed in subsequent steps. The defined amount of the sample is transferred from the metering wells to one or more conditioning and reagent wells for measuring the amount of an analyte contained in each metered amount of the sample.
Abstract:
An assay for the determination of protein in an aqueous test fluid which combines the test fluid with a buffer and a dye. The buffer is selected from citrulline, malonic acid, cyanoacetic acid, citraconic acid, methyl phosphonic acid, sarcosine, saccharin, or combinations thereof. The buffer is added in sufficient quantity to maintain the pH of the assay including the test fluid at a selected target pH range within a range of from about 2.0 to about 3.0. The dye has a pKa which enables it to operate as a protein indicator at the target pH range. The dye also has affinity for protein such that it will provide a detectable response in the presence of greater than about 15 mg/dL protein to thereby render the assay suitable for the detection of total protein in the test fluid. The buffer and dye may be absorbed in a test strip of absorbent material.
Abstract:
Novel aminoalkylthiodibenzoxepins, physiologically tolerable acid addition salts thereof, a method of preparing same, pharmaceutical and veterinary preparations including same and methods of treating by administering same are disclosed. These compounds are useful as analgesic, antidepressant and anticonvulsant agents. A process for selectively reducing olefins by alkaline earth metals in loweralkanols is also disclosed.
Abstract:
Novel aminoalkylthiodibenzothiepins and related compounds, physiologically tolerable acid addition salts thereof, a method of preparing same, pharmaceutical and veterinary preparations including same and methods of treating by administering same are disclosed. These compounds are useful as antidepressant, analgetic, and anticonvulsant agents.
Abstract:
Novel substituted 1,3-dihydrospiro[benzo(c)thiophene]s and methods of preparing the same are described. These compounds are useful as antidepressants and tranquilizers and intermediates therefor.
Abstract:
Novel spiro[indoline-3,4'-piperidine]s and related compounds and methods of preparing same are described. These compounds are useful as antidepressants, anticonvulsants and tranquilizers. Also described is a novel method of preparing indoline rings.
Abstract:
Assays in which samples of biological fluids are dispensed onto reagent-containing porous substrates are improved in the accuracy and repeatability by dispensing the biological fluids in two or more fractions thereof, separated by intervals in which the biological fluid is not dispensed. Reagents and other fluids may be dispensed during the intervals when the biological fluid is not dispensed. Alternatively, reagents and other fluids may be dispensed in a similar manner onto substrates already containing biological fluids.
Abstract:
Assays in which samples of biological fluids are dispensed onto reagent-containing porous substrates are improved in the accuracy and repeatability by dispensing the biological fluids in two or more fractions thereof, separated by intervals in which the biological fluid is not dispensed. Reagents and other fluids may be dispensed during the intervals when the biological fluid is not dispensed. Alternatively, reagents and other fluids may be dispensed in a similar manner onto substrates already containing biological fluids.
Abstract:
Analytical results obtained with microfluidic devices are improved by providing structural features in areas containing dry supported reagents, the structural features directing the flow of a sample over the area in a predetermined uniform manner and facilitating the purging of air.