12 results about "Bioindicator" patented technology

This invention belongs to the field of ecological environment monitoring technology and relates to a multi-level bioindicator method for the effective phytotoxicity of heavy metal-like substances / heavy metals. The method includes the following steps: S1. Obtaining plant samples affected by the soil or water body to be tested; S2. Measuring the activity of superoxide dismutase (SOD), gibberellin (GA), and chlorophyll content in the plant samples; S3. Based on the measured results of SOD activity, plant hormone content, and chlorophyll content, and their changes over time, classifying and assessing the effective phytotoxicity effects of heavy metal-like substances or heavy metals. This invention is the first to propose a unified three-level bioindicator method (SOD activity, GA hormone, and chlorophyll) that can effectively reflect soil pollution levels for typical heavy metal-like substances / heavy metals present in the actual environment, enabling a simpler assessment of the degree of heavy metal pollution in actual soil.

A self-contained biological indicator is provided. The biological indicator includes a housing having at least one liquid-impermeable wall that forms an opening into a compartment. Disposed in the housing are a plurality of test microorganisms; an aqueous liquid medium disposed in an openable container; and a pH indicator dye substrate having a pH indicator dye bound thereto. The pH indicator is not disposed in or in liquid contact with the aqueous liquid medium. The biological indicator further comprises a nutrient composition that facilitates germination and / or outgrowth of the test microorganism, if viable; The nutrient composition can be disposed in the housing or is disposed in the openable container that is in selective fluid communication with the compartment.

This application relates to the field of combustion product testing, specifically a smoke toxicity testing device. It includes a base on which multiple independent mouse cages are fixed, each cage having a gas inlet and a gas outlet. This smoke toxicity testing device directly assesses smoke toxicity by placing live mice in the cages, introducing smoke into the cages, and observing the mice's reactions. Using live mice as a bioindicator for assessing smoke toxicity simulates the potential harm to humans in real fire scenarios, intuitively reflecting the impact of smoke on organisms, and more effectively assessing smoke toxicity. This provides researchers with a direct method for assessing smoke toxicity, offering a basis for improving fire prevention and response measures.

A biological indicator (100) for use in a liquid-chemical decontamination system is disclosed. The biological indicator may include a housing (102) and a cap (106) coupled to the housing. The cap may comprise a liquid chamber and at least two ports. One of the ports may connect to a liquid passage in the cap such that liquids such as liquid-chemical decontaminants may be introduced and removed from the biological indicator via this port.

Provided are a condition change detection system, a condition change detection program, and a vital data complementation method that can accurately detect changes in a subject's condition while suppressing a decrease in detection accuracy even when data is missing. [Solution] A condition change detection system 100 is configured to include a biological information measurement device 101 that measures the vital signs of a subject, and a host device 200 that manages changes in the subject's condition. The host device 200 is primarily configured to include a memory unit 201, an input unit 202, a control unit 203, an output unit 204, and a communication unit 205. In this case, the control unit 203 includes a preprocessing unit 203a that processes acquired vital data into a state suitable for detection, an index calculation unit 203b that calculates bioindicators using the processed data, a change detection unit 203c that detects changes in the subject's condition based on the calculated bioindicators, and a condition notification unit 203d that notifies the subject of changes in condition.

The utility model discloses a biological indicator protection device and a bioreactor, and belongs to the technical field of biological medicine equipment. In order to solve the problems that a biological indicator accidentally falls off in the sterilization process and is hit by a stirring paddle and the like, structures such as a hollow pipe, a plug and an indicator placing bin are mainly adopted, and the indicator placing bin is fixed on a bioreactor tank cover through a sealing ring and a threaded structure. The biological indicator protection device ensures that the position of the biological indicator is stable in the sterilization process, the indicator is prevented from being damaged or polluting reaction substances, and meanwhile operation efficiency and verification accuracy are improved. According to the utility model, the safety protection of the biological indicator and the high efficiency and reliability of sterile verification can be realized.

The utility model discloses steam sterilization biological indicator D value testing equipment which comprises a machine body, a testing chamber is arranged on the machine body, one end of the testing chamber is communicated with a pipe body, the other end of the testing chamber is provided with a cover body, the cover body is detachably connected with the testing chamber, and a sealing mechanism is arranged between the cover body and the testing chamber. The sealing mechanism comprises a first sealing piece used for sealing the cover body and the inner wall of the test chamber in a matched mode and a second sealing piece used for sealing the cover body and the side face, facing one side of the cover body, of the test chamber in a matched mode, and the cover body and the test chamber are closed after being connected. The structure is simple.

A process for determining the viability of a biological indicator includes exposing the biological indicator to a viability detection medium, the biological indicator including test microorganisms, the exposing the biological indicator to the viability detection medium producing a gaseous reaction product when one or more of the test microorganisms are viable. The presence or absence of the gaseous reaction product produced by the biological indicator combined with the viability detection medium is detected with a sensing device, the sensing device comprising a capacitive sensor, an electro-mechanical sensor, or a resistive sensor, wherein the presence of the gaseous reaction product indicates the presence of viable test microorganisms and the absence of the gaseous reaction product indicates the absence of viable test microorganisms. A sterilization detection device includes a container configured to contain the biological indicator, a viability detection medium, and the sensing device.

The invention discloses a suspension type moist heat sterilization biological indicator suitable for room temperature storage as well as a preparation method and application thereof, and belongs to the technical field of microbiological detection and analysis instruments. The suspension type moist heat sterilization biological indicator creatively prepared by adding D-phenylalanine or D-tyrosine can well inhibit spores, so that the spores can be effectively prevented from being damaged by the spores; the shelf life of the product can be prolonged; the inhibition on spores can be relieved, so that the spores can germinate under an unqualified sterilization condition, and the generation of false negative of a suspension type biological indicator is avoided.

The present invention provides a method of detecting an unrecognised environmental polluting event, comprising: (i) measuring the level of one or more bioindicators in a sample obtained from individuals in a first geospatially defined population; and (ii) comparing the level of the one or more bioindicators in the first geospatially defined population to the level of the same one or more bioindicators in a distinct geospatially defined population, or a control value; wherein a statistically significant difference in the level of the one or more bioindicators between the first geospatially defined population and the distinct geospatially defined population, or the control value, is indicative that the first geospatially defined population has been exposed to an environmental polluting event.

A biological indicator reader is provided for reading a plurality of biological indicators to determine the effectiveness of at least a sterilization process. Each biological indicator is configured to exhibit fluorescence when the sterilization process has failed. Each reader comprises a housing having a plurality of biological indicator holders, a heater coupled to the housing and configured to heat the plurality of biological indicator holders to a preselected temperature to incubate the biological indicators, a UV light emitter configured to emit UV light through a first aperture on the side of each holder and an optical detector positioned under a second aperture on the bottom of the biological indicator holder, the optical detector configured to detect fluorescence intensity indicating the effectiveness of the sterilization process. A method of using the biological indicator reader is provided. A biological indicator system and display are also provided.