193 results about "Bioaerosol" patented technology

The present invention is an electrostatic collector for low cost, high throughput, high efficiency sampling and concentration of bioaerosols. The device is small enough to be portable and can be contained within or placed on the wall of a typical office or hospital building. The collector comprises one or more collector modules, each having an ionizing electrode, a conical outer electrode, a wet collection electrode, and a liquid collection system. Airflow through a collector module may be partially blocked to enhance the collection of smaller particles and the collection electrode may comprise multiple, programmable electrodes to focus particle deposition onto a smaller area. Particles are collected into a small volume of liquid to facilitate subsequent analysis by an attached analyzer or at a remote site.

The present invention relates to a system for detection and identification of airborne biological, chemical and / or nuclear threats such as toxins, spores, bacteria, and viruses in real time at distances from a few meters to several kilometers. Compact femtosecond terawatt laser technology is combined with spectroscopic and mathematical methods for spectral sensing of airborne warfare agents such as bio-aerosols. Trigger sensors and standoff devices based on mobile terawatt femtosecond laser systems are provided that may be placed at strategic monitoring locations. Furthermore, the invention relates to the propagation of airborne ultra-short, ultra-intense laser pulses giving rise to plasma channels (filamentation) producing white light supercontinuum ranging from the ultraviolet (UV), visible (VIS), near infra-red (NE) and middle infra-red (MIR). According to this invention, the supercontinuum can be directly produced in a particle cloud and hence is uniquely suitable for multi-spectral long-range atmospheric agent and radioactive isotope detection.

A photocatalytic air purifier is disclosed. The photocatalytic purifier includes filter structures coated with a catalytic material such as titanium dioxide. One or more UV lamps are interposed between the filter structures. The catalytic layer reacts with airborne VOCs and bioaerosols when activated by the UV lamps to thereby oxidize the VOCs and destroy the bioaerosols. The photocatalytic air purifier does not need to be replaced or regenerated after a period of continuous usage. The photocatalytic purifier of the present invention substantially eliminates odors, VOCs, and bioaerosols from air directed through the fan coil. The photocatalytic air purifier includes a control system that optimizes operating costs. Because of these features, service, maintenance, and filter replacement are reduced to a minimum. At the same time, the well being of persons living in the space conditioned by the photocatalytic air purifier is improved.

Smart aerogel, an aerogel material doped with special bio-affinity compounds to providing means of unique collection, detection and identification of bioaerosols, including bacteria, viruses, toxins, and other bioaerosols. Aerogels, extremely low density and highly porous materials with a complex pore structure, are used as an intelligent detection material by incorporating specific bioaffinity pharmaceuticals directly into the matrix. The complex pore structure contains micropores, mesopores, and macropores in an open pore structure. The opening pore structure of the aerogel is used to create docking sites by linking high affinity pharmaceuticals that specifically bind only to certain bioaerosols. The high internal surface area of the aerogel and the extremely low density provides abundant receptor sites per unit mesopore for a high bioaerosol-receptor interaction, yet in a manner which will reduce possible damage and destruction to the bioaerosols captured.

Multiple wavelength spectrometers can be tuned to particular wavelengths. A dual wavelength spectrometer can include a spectrometer configured to detect at least some wavelengths that fall within the ultraviolet (UV) spectrum and a spectrometer configured to detect at least some wavelengths that fall within the visible spectrum. In some embodiments, a UV light spectrometer and a visible light spectrometer are disposed adjacent one another on a single substrate. A dual wavelength spectrometer can be used for analyzing bioaerosols, as well as for numerous other applications.

The systems and methods of the invention utilize time-resolved techniques to deconvolve a measured response to characterize the nature of particles. The measured response is deconvolved into a scatter component and a fluorescence component. The fluorescence component is further characterized into biological and non-biological components. Probability techniques are utilized to predict whether the particles are biological or non-biological.

The invention discloses a real-time detection and analysis method of an indoor air bacteria content based on the Internet of Things. The method comprises the steps of: generating a bioaerosol detection concentration curve; generating a particle concentration curve; performing statistics on environmental parameters within a set time range; performing calculation in combination with the bioaerosol detection concentration curve and the particle concentration curve to obtain the real-time bioaerosol concentration in the current environment; and performing calculation in combination with a room type to obtain an indoor air real-time bacteria content in the current environment. By adopting of the real-time detection and analysis method disclosed by the invention, the real-time detection of the bacteria content in the current environment can be achieved to guide the startup of disinfection and sterilization equipment and to assist the decision making of the indoor environmental emergency treatment, in addition, in combination with an access control subsystem, a photographing subsystem an environment detection subsystem, the change trend of the indoor air bacteria content is estimated, early warning in advance is achieved, the instructions are more precise, the energy consumption is effectively reduced, the early warning of high-risk environment is timely, the occurrence of mass healthevents is reduced, meanwhile the process can be tracked, and the result can be traced.

A bioparticle collection device and an aerosol collection system. The bioparticle collection device includes a collection medium including a plurality of fibers formed into a fiber mat and configured to collect bioparticles thereon, and includes a viability enhancing material provider disposed in a vicinity of the plurality of fibers and configured to provide a viability enhancing material to the collected bioparticles to maintain viability of the bioparticles collected by the fiber mat. The aerosol collection system includes an aerosol pumping device configured to entrain particles in an gas stream, an aerosol saturation device configured to saturate the particles in the gas stream with a biocompatible liquid, and an aerosol collection medium downstream from the aerosol saturation device and including a plurality of fibers formed into a fiber mat for collection of the saturated aerosol particles.

A slit impaction sampling device is for collecting airborne contaminants for subsequent analysis, includes a base with a microscope slide disposed thereon. The microscopic slide has an adhesive media located thereon to assist in adhering airborne particles on the microscopic slide. The base has a top cap secured thereto. The top cap has an inlet opening formed therethrough. The inlet opening has an outer venturi section and an inner laminar section that directs the air flow through the inlet opening into contact with the adhesive media such that the airborne particles form an impaction trace thereon. The air then flows around the microscope slide into an outlet passage and to a vacuum source.

A multiband Raman-fluorescence laser radar system comprises a laser emitting system, an echo signal receiving system and a signal collecting system, and can detect multiband polarized mie scattering signals, nitrogen and water vapor Raman scattering signals and 32-channel night atmosphere fluorescence signals at the same time. The laser emitting system can emit laser beams of 355nm, 532nm and 1064nm at the same time; the echo signal receiving system splits and filters echo signals to acquire polarized mie scattering signals of 355nm and 532nm and Raman scattering signals of 607nm and 660nm; the signal collecting system is connected with the echo signal receiving system, collects vertical and horizontal polarized mie scattering signals of 355nm and 532nm, nitrogen and water vapor Raman signals of 607nm and 660nm and night atmosphere weak fluorescence signals of 32-channel wavelength and combines detection of the night atmosphere weak fluorescence signals of 32-channel wavelength with detection of the polarized mie scattering signals of 355nm and 532nm and waveband of 607nm and 660nm to detect and study spatial and temporal distribution features and complex composition of bioaerosol, atmosphere water vapor spatial and temporal distribution, haze carcinogenic composition and generation and disappearance process.

The invention discloses a spectrograph type laser radar system detecting bioaerosol. The system comprises a laser emitting subsystem, an echo signal receiving subsystem and a signal collecting subsystem. The laser emitting subsystem is used for emitting high-energy pulse laser beams. The echo signal receiving subsystem is used for receiving back scattering signals and converting echo light signals into electric signals. The signal collecting subsystem is used for receiving the electric signals. The system solves the problems that an existing laser radar system is narrow in detection waveband and small in detection waveband number, and the function of the existing laser radar system is single. Besides, the laser radar system can achieve real-time, quick, reliable and non-contact continuous monitoring of atmosphere bioaerosol properties.

The present invention relates to systems and methods for collecting and analyzing bioaerosols, including exhaled breath aerosol from a subject. The collection system comprises an inlet portion configured to receive a gaseous fluid containing water vapor and aerosol particles. A primary passage for gaseous fluid flow is in fluid communication with the inlet portion and configured to channel the gaseous fluid flow therethrough. An outlet portion is in fluid communication with the primary passage. A sample collection region is provided, which is configured to receive from the outlet portion aerosol particles from the gaseous fluid, wherein the aerosol particles are impacted onto a layer of ice.

The present invention discloses testing device which can accurately and conveniently measure the filtration efficiency of the bioaerosol of filtering material or insulation material and a method thereof. In the testing device of the invention, an air compressor and an aerosol mixing chamber are connected through an air inlet pipeline. The aerosol mixing chamber is connected with a movable part of a pneumatic fixture through pipeline. The fixed part of the pneumatic fixture is respectively connected with a downstream biological sampler, a downstream regulating pipeline and a shunting pipeline through the downstream pipeline. The aerosol mixing chamber is respectively connected with a sterilizing pipeline, a sampling pipeline and a regulating pipeline. The testing method according to the invention comprises the steps of preparing a bacterium suspension liquid, retaining the sample to be tested on the pneumatic fixture, decanting the bacterium suspension liquid into a bioaerosol generator, regulating the device and closing all valves, and counting when the culture is taken off and is executed with conditional cultivation. The present invention provides a cabinet type bioaerosol filtration efficiency testing platform which has the advantages of compact structure, movability and transferability.

The invention relates to an apparatus and a process of using the said apparatus in the in-time air sampling, detection and identification of bioaereosols; wherein identification of the said aerosol is based on a multiphoton laser diagnostic technique in combination with the velocity and aerodynamic size of the particular bioaerosol.

A system and process of bio-treatment for enhancing the efficiency of treating waste gas is disclosed. This technology relates to an application of a dust / grease filtering device, a two-way directionally gas inlet system, a bioaerosol removal device, and a cell immobilization technology, to a conventional bioreactor for treating waste gas. The dust / grease filtering device is formed by fillers which form pores being less than 100 mesh, in order to efficiently remove the majority of dust / grease existing in the waste gas, and reduce the pressure drop of the reactor. The two-way directionally gas inlet system can control the direction of the gas flowing into the bioreactor, in order to efficiently control the pressure drop, and the variation of pH value and the humidity in the reactor. The cell immobilized technology makes a connection between support and microorganisms offering the biological reaction, in order to enhance the activity and living percentage of the microorganisms in the biotrickling filter, and reduce the emission of the bioaerosol. The bioaerosol removal device is filled with the fillers having the function of sterilization. After the waste gas is treated and before it is exhausted to the environment, the filler may remove the bioaerosol existing therein, thereby improving the safety and widening the application field of the waste gas bio-treatment system.

The invention provides a bioaerosol monitoring and early-warning method. The bioaerosol monitoring and early-warning method comprises the following steps: subjecting a bioaerosol to filtration so as to convert the bioaerosol into an aqueous solution sample; and then detecting biological particles non-specifically adsorbed on the sensitive surface of a sensor from the aqueous solution sample in real time by using the sensor which is sensitive to surface mass change. With the method, monitoring and early warning of the bioaerosol are realized, and bases are provided for subsequent identity detection and protection of the biological particles; and the method has wide application prospects.

The invention provides aerosol particle monitoring equipment. The aerosol particle monitoring equipment comprises an air inlet pipe, an optical detection chamber, air outlet pipe and an air pump, an excitation light source, a polarize used for polarizing the fluorescence excitation light beam into horizontal polarized light, an extinction trap used for absorbing the excitation light beam, a firstcollimating mirror, a polarization beam splitter used for splitting the Mie scattering light signal into a horizontal polarization component signal and a vertical polarization component signal, a first photoelectric detector used for detecting the vertical polarization component signal, a second photoelectric detector used for detecting the horizontal polarization component signal, and a third photoelectric detector used for detecting a fluorescence signal. The aerosol particle monitoring equipment can simultaneously carry out mie scattering signal detection, fluorescence signal detection anddepolarization degree detection, can simultaneously measure the particle diameter, judge whether the particles are biological aerosol particles or not, analyze the shape characteristics of the particles, accurately distinguish the types of the aerosol particles and effectively eliminate interference signals.

The invention discloses a system and method for monitoring bioaerosol in real time. The system comprises a sample acquisition and transmission unit, a signal detection and processing unit and a data output and display unit, wherein, the sample acquisition and delivery unit comprises a sampler (1), a sample delivery pipe (2), a peristaltic pump (5) and a sampling medium container; the signal detection and processing unit comprises a preamplifier (6), a phase-locked amplifier (7) and a biological chip (3) integrated with a biosensor (5); and the data output and display unit comprises a computerhost and a display connected with the phase-locked amplifier (7). The system and method provided by the invention can be used for monitoring infectious agents in the air, comprising viruses, bacteria, and allergen and the like in real time, can play a role in preventing the biological risks, such as large flu epidemic situation and bioterrorism activity and the like, and also can be used for dynamically representing the changes of microorganism in the air and the like.

In a method for detecting and identifying bioaerosol particles in the air, the bioaerosol particles in a particle stream are selected in an ATOFMS (aerosol time-of-flight mass spectrometer) by means of fluorescence techniques, and only the selected bioaerosol particles are ionized, for instance on the basis of MALDI (matrix-assisted laser desorption / ionization), after which the resulting ions are detected and the bioaerosol particles are identified. The selection of bioaerosol particles takes place by means of laser radiation, generated by a first laser device, of a wavelength which in specifice substances in bioaerosol particles effects a fluorescence, after which by means of a fluorescence detector the bioaerosol particles are selected and a second laser device is triggered to emit light of a wavelength which effects the ionization of the bioaerosol particles selected only by the fluorescence detector.

Exemplary embodiments provide bioaerosol detection systems and methods for detecting bioaerosols. In one embodiment, the bioaerosol detection system can include a humidifier to increase the humidity of a continuously flowing sample volume of a bioaerosol sample using a biologically compatible liquid medium, and an amplifier to deposit vapor on the bioaerosol sample for a particle size amplification process. Bioaerosol(s) can thus be detected and sampled while simultaneously maintaining their viability. The disclosed bioaerosol detection systems and the methods can provide high efficiency for sampling and detecting ultrafine bioaerosol(s) such as viruses and proteins, which can be smaller than 0.3 μm in diameter and can be as small as 20 nm.

The invention provides an optical detection system for bioaerosol and a detection method. The detection system comprises a particle counting unit, a gathering unit, a fluorescence detecting unit and a result determining unit. The detection method comprises the following steps: firstly, particle counting is performed on an aerosol sample in the particle counting unit, then particles of the aerosol sample are gathered by the gathering unit, and the gathered aerosol sample is subjected to fluorescence detection by the fluorescence detection unit; the result determining unit receives detection signals of the particle counting unit and the fluorescence detecting unit, and determines whether the detected aerosol sample is bioaerosol. The fluorescence detecting unit adopts a split light path system, and an ultraviolet semiconductor laser is adopted as an ultraviolet light source. The detection system provided by the invention has the advantages of high sensitivity and signal-to-noise ratio, structure flexibility and wide adaptability; the detection method based on the detection system increases the determination basis, has better reliability and reduces the probability of false alarm.

The invention discloses an experiment table for evaluating the microbial filtration performance of an air filter for ventilation. The system comprises an air volume control system, a microbial aerosolgeneration system, a microbial sampling system, an environmental parameter measurement system, a disinfection and sterilization system and a data recording and acquisition system, wherein the fan ispositioned at the forefront of the whole experiment table, and the microbial aerosol generating system consists of a generator, a host and a tripod; the environmental parameter measurement system comprises a pressure transmitter, a temperature and humidity transmitter and an anemograph; the disinfection and sterilization system consists of a disinfection instrument and a bypass disinfection pipeline; the data recording and collecting system is composed of a computer. The experiment table can be used for testing and experimentally researching the performances such as the resistance, the microorganism filtering efficiency and the dust holding capacity of the air filter.

An improved method for charging ultrafine particles in coronas (e.g., unipolar or bipolar corona discharges) by exposing the particles to X-ray irradiation. Experimental tests have verified that positive corona in the presence of X-ray irradiation results in maximum or optimum charging efficiency, followed by a negative corona in the presence of X-ray irradiation, X-ray radiation only (without corona), negative corona only (without X-ray irradiation), and finally positive corona only (without X-ray irradiation). This method and system is particularly well suited for use with bioaerosol particles wherein exposure to the corona discharge and X-ray irradiation serves to both capture and inactivate the bioaerosol particles using a single device.

A system for generating a liquid sample includes a chamber adapted to hold a fluid, an air filter configured to be received in the chamber, a mechanism for releasing at least a portion of a particulate disposed on the filter into the fluid located in the chamber, and a structure for removing at least a portion of the particulate containing fluid from the chamber.

The invention relates to a bioaerosol laser monitoring and early warning and identification device, which comprises a monitoring unit, a sampling unit, an identification unit and a total control unit. The monitoring unit monitors bioaerosol in the environment and distinguishes non-bio-particles and bio-particles in the air to obtain a bio-particle concentration, and transmits the bio-particle concentration to the total control unit. The total control unit controls the working state of the monitoring unit, the sampling unit and the identification unit respectively, when the bioaerosol concentration monitored by the monitoring unit reaches an early-warning threshold, the total control unit sends an early-warning signal, and at the same time triggers the sampling unit in terms of starting collection of bioaerosol samples. The device provided by the invention can accurately identify the varieties of bioaerosol, quickly identify the varieties of bio-particles, and has the advantages of short identification time and high accuracy.