Abstract: An ascending/descending indicator can include a sealed housing that contains a deep eutectic solvent (DES) within the housing. The DES can include two or more components and is configured to exhibit a first characteristic when at a first temperature and to assume a second characteristic when exposed to a second temperature and to substantially maintain the second characteristic even when again exposed to the first temperature.

Abstract: Cradles for draining liquid from containers are described herein. An example apparatus includes a housing having a bottom wall, a side wall and an open top. The housing is to receive a container having liquid. The example apparatus includes a probe extending upward from the bottom wall toward the open top and is to drain the liquid from the container when the probe is inserted into the container. The example apparatus also includes a sliding lock slidably disposed within the housing that receives a cap or top of the container when the container is inserted into the housing. The sliding lock includes a key slot. The sliding lock is movable when a cap or top of the container has a matching key that engages the key slot, which enables the sliding lock to move downward to expose the probe and drain the liquid from the container.

Abstract: A permeative amine/acid introduction device (PAID) is placed after a conventional KOH eluent suppressed conductometric anion chromatography (SCAC) system. The PAID converts the suppressed eluites from the acid form to the corresponding salt. For example, when the analytes are acids, they are converted to the corresponding ammonium salt (NR2H+HX?NR2H2++X?) and allows very weak acids HX (pKa?7.0) that cannot normally be detected by SCAC to be measured by a second conductivity detector following the PAID. Permeative reagent introduction is dilutionless, can be operated without pumps and provides good mixing with low band dispersion (as small as 30 ?L). An exemplary amine is diethylamine (DEA), which was chosen as the amine source due to its low pKb value (pKb 3.0), high vapor pressure, and low toxicity and low odor.

Abstract: The present disclosure provides methods for determining surfactant retention values in subterranean reservoirs. In particular, the methods comprise conducting at least one single well chemical tracer test and performing a straight line analysis on a saturation profile of the subterranean reservoir.

Abstract: The present invention relates to a method for quantitatively analyzing Cl, remaining after synthesis, in zinc ferrite synthesized using chloride precursors such as zinc chloride and iron chloride, and provides a method capable of using, in a quantitative analysis method of Cl remaining after synthesis of an inorganic material, AQF-IC, which has been used only in the quantitative analysis of an organic sample since gaseous Cl, discharged after burning zinc ferrite in an automatic quick furnace (AQF) by using an Sn capsule and tungsten oxide (WO3), is analyzed through ion chromatography (IC).

Abstract: Various bioFET sensor readout circuits and their methods of operation are described. A readout circuit includes a plurality of logic gates coupled in cascade, a delay extractor, and a counting module. Each logic gate of the plurality of logic gates includes at least one bioFET sensor. The delay extractor is designed to generate a pulse-width signal based on a time difference between an output signal from the plurality of logic gates and a reference signal. The counting module is designed to receive the pulse-width signal and output a digital count corresponding to a width of the pulse-width signal.

Abstract: A titration system is disclosed for determining content of an analyte in a sample. The titration system comprises: a controller; a reaction vessel; a titration vessel and an indicator vessel in fluid communication with the reaction vessel; a spectroscopy unit; a sensor for outputting a signal to the controller based on a force exerted by the reaction vessel on the sensor. The controller executes a stored program to: (i) perform titration by delivering to the reaction vessel a first mass of a first fluid comprising the sample, a second mass of a second fluid comprising indicator, and a third mass of a third fluid comprising titrant; (ii) detect color change in the mixture in the reaction vessel based on a signal from the spectroscopy unit and stop titration; and (iii) calculate content of the analyte in the sample based on the first mass, the second mass, and the third mass.

Abstract: Gas analyzer and method for measuring nitrogen oxides in an exhaust gas, wherein to measure the nitrogen oxides, ozone is generated from oxygen, the exhaust gas is treated with the ozone generated to convert nitrogen monoxide within the exhaust gas into nitrogen dioxide, the nitrogen dioxide concentration in the treated exhaust gas is measured photometrically using a first light-emitting diode which emits with a central wavelength between 350 nm and 500 nm and output as the nitrogen oxide concentration in the exhaust gas, and the ozone concentration in the treated exhaust gas is measured photometrically using a second light-emitting diode which emits with a central wavelength between 250 nm and 265 nm, where generation of the ozone using the measured ozone concentration as an actual value is regulated to a prespecified setpoint value to enable reliable continuous measurement of nitrogen oxides in exhaust gases with a low outlay on equipment.

Abstract: Embodiments of the present disclosure pertain to a colorimetric system for detecting a substance, the colorimetric system that includes a first chemical container adapted for releasing a first chemical; a second chemical container adapted for releasing a second chemical; a flow modulation sheet adjacent each chemical container; and an encapsulation covering the flow modulation sheet and each chemical container, where the encapsulation comprises a window defining a target area of the filter paper such that the target area is adapted for applying the substance; where the flow modulation sheet comprises a design adapted for automatically controlling a first flow of the first chemical and a second flow of the second chemical to the target area after simultaneously releasing the first and second chemicals; and where the design comprises a first void disposed in the flow modulation sheet.

Abstract: Microfluidic devices are described that include a microfluidic channel, a first array of one or more magnets above the microfluidic channel, each magnet in the first array having a magnetic pole orientation opposite to a magnetic pole orientation of an adjacent magnet in the first array, and a second array of one or more magnets beneath the microfluidic channel, each magnet in the second array having a magnetic pole orientation opposite to a magnetic pole orientation of an adjacent magnet in the second array. The first array is aligned with respect to the second array such that magnetic fields emitted by the first array and second array generate a magnetic flux gradient profile extending through the channel. An absolute value of the profile includes a first maximum and a second maximum that bound a local minimum. The local minimum is located within the microfluidic channel or less than 5 mm away from a wall of the microfluidic channel. Methods of using the new devices are also described.

Abstract: Disclosed are methods and systems to determine a subject's metabolic vulnerability index (MVX) score using at least one defined mathematical model of risk. The methods comprise evaluating various biomarkers to distinguish various health risks. In one embodiment, the method comprises evaluating biomarkers to determine a relative risk of premature all-cause mortality. The model may include NMR-derived measurements of GlycA, S-HDLP, branched chain amino acids (BCAAs), ketone bodies, total serum protein, and citrate in at least one biosample of the subject.

Abstract: The present subject matter provides glucose biosensors as well as compositions, devices, and methods comprising such biosensors.

Abstract: A device for receiving and analysing a sample, wherein the analysing involves use of a solution. The device comprises: a sample receiving portion for receiving a sample to be analysed; and a solution capsule having a sealed configuration in which the solution capsule is sealed and a release configuration in which contents of the solution capsule are released via a flow path that provides fluid communication between the solution capsule and the sample receiving portion. The device further comprises a bistable release mechanism comprising an actuator wherein the bistable release mechanism releases only in the event that a force applied to the actuator reaches a threshold force and wherein actuation of the actuator results in one-way conversion of the solution capsule from the sealed configuration into the release configuration.

Abstract: In various embodiments the present disclosure provides a core/shell nanocrystal comprising a core and a shell formed on the core, wherein the core/shell nanocrystal is co-doped with at least one metal dopant and at least one trivalent cation. In some embodiments, the trivalent cation is a Group 13 element. Methods of making and using the core/shell nanocrystal are also described.

Abstract: To measure above-saturation water content of hydrocarbons, a liquid hydrocarbon sample is received from a flowline carrying the liquid hydrocarbon. The liquid hydrocarbon sample includes liquid hydrocarbon and liquid water at a concentration greater than a water saturation level. The liquid hydrocarbon sample is mixed with a solvent. The concentration of liquid water in a mixture of the solvent and the liquid hydrocarbon sample is below the water saturation level. After mixing the liquid hydrocarbon sample with the solvent, a water content in the liquid hydrocarbon sample is determined.

Abstract: Disclosed are nucleated red blood cell warning devices and methods, and flow cytometers using the same. The devices, methods and flow cytometers can warn whether nucleated red blood cells exist in a blood sample. The warning device may obtain forward-scattered light information, side-scattered light information and fluorescence information when cells in the blood sample pass through a detection region of the flow cytometer. The warning device may generate a side-scattered light-fluorescence dot plot, so as to classify leucocytes into four groups, and may generate a forward-scattered light-fluorescence dot plot, where the forward-scattered light-fluorescence dot plot can include a leucocyte group region. The warning device may obtain a predetermined feature region located at the left side of the leucocyte group region, perform statistics on the amount of characterization cells in the predetermined feature region, and provide a warning when the number of the characterization cells exceeds a threshold value.

Abstract: Methods are described for determining the amount of insulin in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying insulin in a biological sample utilizing purification methods coupled with tandem mass spectrometric or high resolution/high accuracy mass spectrometric techniques.

Abstract: In an embodiment, the claimed invention includes an oral-fluid collection and testing device that is simple to operate. The device includes a body assembly and a cap assembly that are easy to handle by a user. A collection sponge projects from an end of the body assembly for absorbing the oral fluid of a donor, A cap assembly is easily aligned with the body assembly by way of visual alignment indicators on both the body and the cap. Once the cap is aligned with the body, a user simply pushes the cap onto the ‘body, which causes a first stage fluid, flow. More specifically, a buffer fluid is released from the cap and mixes with the oral fluid collected on the sponge—After waiting a short time* the cap is rotated, then pushed again, causing a second-stage fluid flow in which the sponge is compressed such that the buffer fluid/oral fluid exits the sponge and flows toward a. pair of test strips.

Abstract: Some embodiments of a blood coagulation testing system include an analyzer console device and a single-use components configured to releasably install into the console device. In some embodiments, the blood coagulation testing system can operate as an automated thromboelastometry system that is particularly useful, for example, at a point-of-care site. The systems can be configured with features such as individual actuation systems for each measurement module, and firmware for initial and ongoing calibration and error detection.

Abstract: The present invention relates to a method of analyzing a polyamine having a plurality of amino groups in the same molecule or a monoamine having an amino group and a phenolic hydroxyl group in the same molecule on the basis of the measurement result of the intensity of excimer fluorescence emitted as a result of the derivatization of the polyamine or the monoamine with a fluorescence derivatization reagent having a pyrene group. The method is characterized in that the fluorescence derivatization reagent comprises 2-chloro-4-methoxy-6-(4-(pyren-1-yl) butoxy)-1, 3, 5-triazine represented by the formula (2).