Abstract: The invention relates to a gas chromatography system for the direct coupling of liquid chromatography and gas chromatography or for the introduction of large sample volumes, which is configured to operate selectively in a retention mode. The inventive system includes a tube (2) having a first inlet part (21), a second inlet part (22) and a retention part (3) between said two inlet parts. The system also includes two gas delivery subsystems (6, 7) and a sample introduction conduit (101) which is connected to the first inlet part (21). The system further includes a discharge conduit (9) and a gas chromatography column (300), both of which are connected to the second inlet part (22). The invention also relates to a gas chromatography method.

Abstract: A method and system for calibrating an electronic lapping guide (ELG) for transducer(s) having an ABS and a magnetic structure are described. The magnetic structure has a desired thickness, a bevel, and a flare point a distance from the ABS. The method and system include providing at least three ELGs. A first ELG has first and second edges first and second distances from the ABS. A second ELG has third and fourth edges third and second distances from the ABS. A third ELG has fifth and sixth edges fourth and second distances from the ABS. The first, third, and fourth distances correspond to a stripe height and an offset. The first, third, and fourth distance and/or the second distance corresponds to an intersection between the bevel and the desired thickness. The method and system also include measuring resistances of the ELGs, and calibrating the ELG(s) utilizing the offset and resistances.

Abstract: A method for detecting the presence of a leak between two fluid paths of an assembled plate heat exchanger by evacuating one or both fluid paths to a low pressure, introducing a test gas to one of the fluid paths to create a pressure differential between the fluid paths, and testing for the presence of test gas in the second fluid path.

Abstract: A sensor including a tubular casing having an open rear end; and a first elastic member having a through hole so as to introduce ambient air into the casing and disposed so as to block the rear end opening of the casing.

Abstract: Embodiments of the invention relate to a device for a fluid enclosure. The device includes a sensing device that responds to a change in distance relative to a fluid enclosure. The change in distance is a function of at least one dimension of the fluid enclosure.

Abstract: An apparatus and method for determining the water cut value of a multiphase fluid flowing within a pipe is provided. The device includes a sequestering structure disposed within the pipe, a transmitting device, a receiving device, and a processing device. The sequestering structure at least partially defines a sensing passage within the pipe, which passage has a gap extending substantially normal to a direction of fluid flow within the pipe. The sensing passage is oriented to sequester an amount of a liquid component of the multi-phase fluid sufficient to form a continuous liquid body extending across the gap of the sensing passage. The transmitting device is operable to transmit a signal through the liquid across the gap of the sensing passage. The receiving device is operable to receive the signal after it has traversed the liquid within the sensing passage, and create sensor data.

Abstract: An apparatus and method for liquid leak detection includes first and second flexible members each constructed of an electrically conductive material that is in a normally open circuit state. Also included is a liquid wicking permeable surrounding sidewall that is positioned adjacent to the first and second flexible members, the liquid permeable surrounding sidewall is constructed of a non electrically conductive material. Operationally, the liquid wicking permeable surrounding sidewall becomes electrically conductive when a liquid is present in the liquid wicking permeable surrounding sidewall, facilitating the first and second flexible members to move to a closed circuit state that results in a perceptible output. Additionally, included is a liquid permeable planar web reinforcing element that is oriented adjacent to the liquid wicking permeable surrounding sidewall wherein the liquid permeable planar web reinforcing element is oppositely disposed of the first and second flexible members.

Abstract: A surface texture measuring instrument includes: a measuring device that includes a detector for detecting surface texture of a workpiece and an X-axis movement mechanism for moving the detector in a measurement direction; an elevation inclination adjuster capable of adjusting an elevation position and an inclination angle of a table on which the measuring device is mounted; a stage on which the workpiece is mounted; and a controller that controls the measuring device and the elevation inclination adjuster. The controller includes: a measurement controller that controls the X-axis movement mechanism to conduct a preliminary measurement and main measurement of the workpiece; a computing unit that acquires a result of the preliminary measurement from the detector and obtains an inclination angle of the workpiece at which the workpiece is inclined to the measurement direction; and a positioning controller for adjusting the inclination angle of the table based on the obtained inclination angle.

Abstract: A method and apparatus for measuring particle concentration and size distribution of particles in liquids. The method involve separating dissolved and particulate residues in liquids for determination of the size and concentration of the particulate species. The method includes the steps of forming an aerosol from the liquid sample to be analyzed, evaporating the droplets in the aerosol to dryness, and detecting the particles. An apparatus for separating dissolved and particulate residues in liquids for determination of the size and concentration of the particulate species is also disclosed. The apparatus includes a droplet former, a dryer communicatively connected to the droplet former, and a detector communicatively connected to the evaporator for detecting particles.

Abstract: A detection device capable of giving atomic and molecular compositions of gases made of concentric tubes and a fiber optic. The body of the detector holds these constituents in their relative positions. A micro-discharge is created between two of the concentric tubes at the tip of the device. The small size of the tubes allows a stable discharge to be achieved. The light from this discharge is delivered from the discharge area to an optical sensing device through the fiber optic. The optical sensing device, along with a computer, analyzes the light to determine the composition of the gas in the discharge. Gas and vacuum are applied through the tubes as needed to aid operation. The detector can be battery powered and used in both hot and toxic environments. Alternatively, a voltmeter can be used to measure impedance across the discharge thus providing another means to determine relative changes in gas composition.

Abstract: A heat exchanger leak detector employs a bubble detector to detect gas pressure build up in a heat exchanger second side from leakage of pressurized gas introduced in a heat exchanger first side.

Abstract: Time-series data of piezoelectric resonator frequencies for each concentration of a substance to be absorbed is collectively displayed. An absorption start point of a substance to be absorbed is set in pieces of the time-series data. An editor combines and displays at least frequency variation regions in the data. The absorption start point setting is realized when an operator positions a pointer and clicks on the time-series data, or when an absorption start signal is output at the time when a solution is supplied.

Abstract: A surface shape of a member to be measured is measured by reflecting measuring light at a reflection surface of a probe and utilizing an atomic force exerting between the probe and utilizing an atomic force exerting between the probe and the member to be measured. In addition to a first scanner for driving the probe, a second scanner for moving a focus position of an optical system is provided. Position conversion data representing a correlation between amounts of control of the first scanner and the second scanner are obtained in advance. By synchronously driving the first scanner and the second scanner, the focus position of the optical system is caused to follow the probe to improve measurement accuracy.

Abstract: A system and method are provided for selectively functionalizing a transducer microarray. The method provides a microarray including a field of transducers exposed to a shared local environment. A difference in the pH associated with the transducers is created. As a result, functional molecules are selectively bound to transducers in response to the pH associated with the transducers. In one aspect, the micro-array also provides a field of transducer pH-generating electrodes, one pH-generating electrode for each transducer, and a counter electrode. The difference in pH associated with the transducers is created by selectively applying a voltage potential between pH-generating electrodes and the counter electrode, to create a difference of pH in regions adjacent to the transducers.

Abstract: The present invention is directed to a method for multidimensional gas chromatography for separating the analytes of a complex sample. The method comprises the steps of introducing the sample onto a first column whereby the sample is separated into at least two segments, introducing at least one segment into a heartcut device whereby the segments are selectively separated into at least two heartcut fractions, introducing at least one of the fractions onto a second column whereby at least one fraction is further separated into at least two analytes, introducing at least one analyte from the second column to a gas chromatography connector, introducing the analyte from the connector to a third column, and introducing the analyte from the third column into a detector whereby the analyte is analyzed and identified.

Abstract: The invention relates to an apparatus comprising a measurement chamber and a resonator, which can be integrated in the measurement chamber via a quick-action closure, for the liquid sensor system and for verification and measurement of the concentration of materials, substances, particles and/or microorganisms in liquids. The invention is characterized in that the resonator is held only on its outer circumference by a thin elastomer ring, and in that at the radial distance of the external diameter of the resonator, the elastomer ring on the one hand rests on an upper sealing ring of the measurement chamber, forming a seal, and on the other hand rests on a holding ring.

Abstract: An apparatus and method for measuring paravalvular leakage from a prosthetic heart valve in vitro. The apparatus has a pulse chamber pressure vessel and a pulsatile pump. The sewing ring of a prosthetic heart valve is mounted to a mounting member which is affixed to the pressure chamber, and paravalvular leakage from the heart valve is collected and measured.

Abstract: The present invention provides a medical device having an elongate body with both a proximal end and a distal end, wherein the elongate body defines an intake lumen and an exhaust lumen. The medical device also has a first pliable element defining a cooling chamber disposed at a point along the elongate body, with the cooling chamber being in fluid communication with the intake lumen and the exhaust lumen. A second pliable element is provided which at least partially encloses the first pliable element, thereby defining a junction between the first and second pliable element. Moreover, a check valve is included which is in fluid communication with the junction between the first pliable element and second pliable element, the valve further being in fluid communication with the exhaust lumen. In addition, the medical device may include sensors or other monitoring means in fluid communication with the junction and the cooling chamber.

Abstract: A self-cleaning humidity sensor based on Mg2+/Na+-doped TiO2 nanofiber mats is provided. Examples show the response and recovery characteristic curves for ten circles with the RH changing from 11% to 95%. The nanofibers are manufactured by mixing together a metal salt comprising titanium, a magnesium compound, a sodium compound, and a high molecular weight material to form a mixture, electrospinning the mixture to form composite nanofibers, and calcining the composite nanofibers to yield a TiO2 nanofiber material doped with magnesium and sodium.

Abstract: A system for measuring a property of a sample includes an actuation device disposed on a substrate and includes a flexible surface spaced apart from the substrate and configured so as to allow placement of the sample thereupon. The actuation device also includes a vertical actuator that is configured to cause the flexible surface to achieve a predetermined displacement from the substrate when a corresponding potential is applied thereto. A sensing probe is disposed so as to be configured to interact with the sample thereby sensing the property of the sample.