Provided are a device and a method for adjusting the number and size of air bubbles, more particularly, a device and a method for adjusting the number and size of air bubbles, capable of mixing a liquid and gas to form an air bubble mixture or air bubble water (water containing air bubble) and freely adjusting the number and size of air bubbles contained in the formed air bubble mixture to thereby be used in various fields.

An atomizer mixing chamber for a seed treater has a body having first and second inlets for receiving first and second treatment fluids. The atomizer mixing chamber has a first stage cup for receiving and combining the first and second treatment fluids to provide a combined fluid, the first stage cup comprising a first set of holes through which the combined fluid flows. The atomizer also has a second stage cup below the first stage cup for receiving the combined fluid from the first stage cup, wherein the second stage cup further mixes the combined fluid to provide a mixed fluid and wherein the second stage cup comprises a second set of holes through which the mixed fluid flows. The atomizer mixing chamber may include a third stage cup below the second stage cup for receiving the mixed fluid and having a third set of holes through which the mixed fluid exits from the atomizer.

A batch or continuous mixer for mixing powders, immiscible liquids, or a powder with a liquid includes one or more vibrational energy applicators which propagate vibrational energy into the mixture, causing powders to flow like liquids and breaking up liquid droplets and powder clumps. In embodiments, the vibration frequency and amplitude are selected according to properties of the mixture components. Vibrations can be propagated through container walls, impellers, or other structures within the mixing container. Vibrated structures can be flexibly supported for enhanced propagation of the vibrations. Vibrational energy can be uniform throughout the container, or focused in a desired region. Ultrasonic energy can be simultaneously applied with acoustic energy.

A plug side surface of a plug housing is provided with a claw portion. The claw portion includes a plug lock surface facing in a direction away from a connector mounting surface. Each assistant fitting of a receptacle connector includes a receptacle lock surface that faces in a direction approaching the connector mounting surface and is opposed to the plug lock surface in a mated state. The plug lock surface includes a lock maintaining surface and an unlocking surface. Assuming that an angle formed between a reference plane and the lock maintaining surface is a lock maintaining angle and an angle formed between the reference plane and the unlocking surface is an unlocking angle, the lock maintaining angle is smaller than the unlocking angle.

A system, device, and method for receiving, preparing and identifying a biological sample. Some parts may be user held and actuated. The sample may be detected by an array of sensors. The system may comprise reusable and disposable components arranged to be connected together. The biological sample may contain nucleic acids, proteins, or other molecules to be detected.

A method includes providing a water sample for analysis at a well site, or at a location proximate the well site, where the water sample is collected from at least one water source and the water sample comprises at least one analyte. The water sample and a reagent are introduced into a microfluidic mixing cell to produce a mixture of the reagent and water sample, and the mixture has a detectable characteristic indicative of concentration of the at least one analyate in the water sample. The detectable characteristic is measured by spectrophotometry to determine concentration of the at least one analyte. Then a subterranean formation treatment fluid is prepared using water from the at least one water source based on the concentration of the at least one analyte. The introducing into the microfluidic mixing cell and the measuring by spectrophotometry are conducted over an elapsed time period of about 5 minutes or less.