Devices, systems, and their methods of use, for generating droplets are provided. One or more geometric parameters of a microfluidic channel can be selected to generate droplets of a desired and predictable droplet size.

A valve system for driving fluid and a method for using the same are provided. The valve system includes a fluid unit far away from the rotation center, a fluid unit close to the rotation center, a fluid transferring unit and a gas path pipeline for communicating the fluid unit close to the rotation center with the fluid unit far away from the rotation center. A rotation radius of a fluid outlet of the fluid unit far away from the rotation center is greater than that of a fluid inlet of the fluid unit close to the rotation center. The fluid outlet of the fluid unit far away from the rotation center is located at an end thereof away from the rotation center, and the fluid inlet of the fluid unit close to the rotation center is located at an end thereof close to the rotation center.

Beads with functionalized material applied to them are exposed to an acoustic field to trap, retain or pass the beads. The beads may include or be free of ferro magnetic material. The beads may be biocompatible or biodegradable for a host. The size of the beads may vary over a range, and/or be heterogenous or homogenous. The composition of the beads may include high, neutral or low acoustic contrast material. The chemistry of the functionalized material may be compatible with existing processes. The acoustic field may be generated, for example, in an acoustic angled wave device or in an acoustic fluidized bed.

A system for testing for an analyte includes a test strip. The test strip includes a first flow path. The test strip further includes a heating element in communication with a heating area of the first flow path, for heating a sample in the first flow path. The test strip further includes an e-gate, the e-gate in the first flow path, the e-gate separating the heating area from a detection area of the first flow path.

A device configured to collect a blood sample comprising a capillary means, wherein the capillary means is configured to collect and dry the blood sample and comprises an effective amount of a distributed inhibitor of phospholipase D. The device may be configured to receive, transport and collect a blood sample comprising a compartment in fluid connection with the capillary means, wherein the capillary means is configured to collect and dry the blood sample and comprises an effective amount of a distributed PLD inhibitor. The device may be a microfluidic device comprising an inlet portion, an outlet portion comprising a capillary means configured to collect and dry the blood sample, and optionally a metering function, wherein the microfluidic device comprises an effective amount of a distributed PLD inhibitor. The PLD inhibitor is distributed in a water soluble film, preferably a PVA film, or in an absorbent paper or polymer or in the capillary means. The PLD inhibitor may be selected from a salt of a transition metal belonging to column 5 or 6 of the periodic table, a salt of vanadium and a salt of tungsten, a salt comprising a vanadium oxyanion and a salt comprising a tungsten oxyanion, and/or at least one of NaVO3 (sodium metavanadate) and Na2WO4 (sodium tungstate). A method of preparing a sample for analysis of phosphatidylethanol (PEth) comprises providing a blood sample with a volume of less than 10 ml to the device; contacting the blood sample with at least one inhibitor of the enzyme phospholipase D selected from at least one of a salt of vanadium and a salt of tungsten; and admitting inhibition of phospholipase D so formation of PEth is blocked.

The invention provides sample cartridges for processing samples. The sample cartridges comprise at least one fluidic channel. Each fluidic channel comprises a sample chamber, a lysis chamber, a binding chamber, a pre-amplification region, and an amplification region. The sample cartridges also comprise a waste line that is in fluidic connectivity with each fluidic channel. The sample cartridges can interface with a plurality of plungers that are capable of occluding at least one fluidic channel, waste line, and/or optional assay line to limit the transport of fluids into, out of, and/or along at least one fluidic channel by plunging. The invention also provides multi-channel sample cartridges, which are sample cartridges that comprise at least two fluidic channels. In addition, the sample cartridges can house fluids on the cartridge, off the cartridge, or some on the cartridge and some fluids off the cartridge.

A sample carrier is used in a rotation-based method for reproducing or detecting DNA. The sample carrier has a disc-like main part and a plurality of cavities formed in the main part, in which cavities, a sample fluid at least potentially containing DNA is received. A disc side of the main part forms a heat entry side and the flat side facing away therefrom forms a heat discharge side. The cavity or one of a plurality of cavities, as applicable, is formed by an annular channel having a first and a second channel portion, which are fluidically connected at both longitudinal ends by a connection portion in each case. The first channel portion is arranged offset relative to the second channel portion in the thickness direction of the main part.

An apparatus for supporting an array of layers of amphiphilic molecules, the apparatus comprising: a body, formed in a surface of the body, an array of sensor wells capable of supporting a layer of amphiphilic molecules across the sensor wells, the sensor wells each containing an electrode for connection to an electrical circuit, and formed in the surface of the body between the sensor wells, flow control wells capable of smoothing the flow of a fluid across the surface.

An apparatus for supporting an array of layers of amphiphilic molecules, the apparatus comprising: a body, formed in a surface of the body, an array of sensor wells capable of supporting a layer of amphiphilic molecules across the sensor wells, the sensor wells each containing an electrode for connection to an electrical circuit, and formed in the surface of the body between the sensor wells, flow control wells capable of smoothing the flow of a fluid across the surface.

The present invention intends to enable light path length to be kept the same between sample measurement and reference measurement and thereby improve measurement accuracy, and is an optical analyzer that analyzes a sample flowing through a pipe having translucency. In addition, the optical analyzer includes: a light source unit that has a light source and a condenser lens; a light detection unit that detects light of the light source unit; and a support mechanism that movably supports the light source unit and the light detection unit. Further, the support mechanism moves the light source unit and the light detection unit between a sample measurement position and a reference measurement position.