A compact, portable, low-cost electrostatic bioaerosol sampler device is provided for collection of aerosolized biological and non-biological particles. The device may be used for long-term, large-scale deployment. With a low-pressure design, the device can sample a high flowrate of 10 lit/min with a low-power fan. The device collects dust particles with a nominal size range of 1-10 μm, with an efficiency of >60%. The device may include aerosol sensing components, a particle ionizer, and an electrostatic precipitator. A removable cassette includes a ground plate for collection of ionized particles and a high voltage plate opposite the ground plate. A divider may be included beneath the ionizer to facilitate separation of collected particles by size on the ground plate.

A device for scattered light measurement of particles in a gas, comprising a light source, a beam splitter which splits a light beam emitted by the light source into a measuring beam and a reference beam, a light receiving device arranged at a distance from the beam splitter, which comprises at least one lens arranged in the reference beam with an optical axis aligned at an acute angle to the measuring beam, a first light receiver on the side of the lens facing away from the beam splitter, for receiving the scattered light imaged by the latter from a measurement volume in a gas-bearing region between the beam splitter and the lens, and a second light receiver on the side of the lens facing away from the beam splitter for receiving the reference beam imaged by the latter.

The present disclosure provides methods and compositions for preparing linearity control slides to verify linearity of image-based hematology analyzers without the need to make such control slides over and over again for each analyzer each time the analyzer is verified.

The present disclosure discloses a degassing-free underwater dissolved carbon dioxide detection device and a detection method. The degassing-free underwater dissolved carbon dioxide detection device includes a computer, which is used to provide the driving signal and controlling parameters for the power tuning unit; the computer is connected with a laser driving control module and the power tuning unit, respectively; the laser driving control module is connected with a laser; the laser is connected with a photo-isolator; the photo-isolator is connected with a thulium-doped fiber vertical-cavity laser system; the thulium-doped fiber vertical-cavity laser system is connected with a photoacoustic cell system through a fiber collimator; the photoacoustic cell system is connected with a pre-amplifier circuit and a lock-in amplifier in sequence, and the lock-in amplifier is connected with the computer.

Apparatus and method for separating whole cells from a mixture, e.g., including liquid, other cell types, nucleic acid material, or other components. Focused acoustic energy may be used to move whole cells in a chamber so that the cells exit the chamber via a first outlet rather than a second outlet. A filter may, or need not, be used to assist in separation.

A method for measuring concentrations of blood cell components is provided. The method comprises: obtaining a blood sample from a subject, the blood sample comprising at least one of red blood cells (RBCs), white blood cells (WBCs), and platelets (PLTs); mixing the blood sample with a non-lysing aqueous solution to form a sample mixture comprising a predetermined tonicity; passing the sample mixture through a flow cell; emitting light towards the flow cell; measuring at least one of an amount of light absorbed by the RBCs to obtain an RBC absorption value, an amount of light scattered by WBCs to obtain a WBC scatter value, and an amount of light scattered by PLTs to obtain a PLT scatter value; and determining a concentration of at least one of the RBCs, WBCs, and PLTs present in the sample mixture.

A cell culture apparatus includes a flow passage in which cell suspension containing at least one of cells or cell masses as granular bodies is to flow, and an imaging unit that is provided in a middle of the flow passage and continuously images the plurality of granular bodies contained in the cell suspension to acquire a plurality of images while the cell suspension flows in the flow passage.

The present invention relates generally to the field of plastic microparticles. In particular, the present invention relates to the detection of plastic microparticles in a water-based sample. An embodiment of the present invention relates to a process for detecting and characterizing plastic microparticles in a water-based sample comprising the analysis of the sample by spectral flow cytometry. In accordance with the present invention, the process described herein may comprise the processing of the recorded flow cytometry data by a machine learning algorithm that can distinguish and categorize each particle based on its unique spectrum to characterize, for example, the plastic microparticles.

Provided is a flow analyzer and a flow analysis method each of which makes it possible to stably and continuously measure a sample. The flow analyzer and the flow analysis method each include: a marker introducing device (2) which is for introducing a marker into a tube (3); and a marker detecting device (5) which detects the marker and outputs a detection signal to an analyzing device (4), the analyzing device (4) acquiring analysis data on the basis of the detection signal.

A light scattering particulate matter measuring apparatus is disclosed. The light scattering particulate matter measuring apparatus according to the present invention comprises: a casing provided with an inlet into which outside air flows and an outlet through which is exhausted measured air of which the particulate matter concentration has been measured; an airflow pathway which connects the inlet and the outlet in the casing and along which outside air moves; and an external temperature-humidity sensor which is provided on the outside of the casing and measures the temperature and relative humidity of outside air.