Provided is an oxygen detecting agent composition including a redox dye and a reducing agent, the redox dye being an inorganic substance.

There is disclosed a method of calibrating a gas sensor comprising a luminescent compound having a luminescence lifetime that is quenched by a gaseous substance which uses a model of the relationship between the luminescence lifetime and the concentration of the gaseous substance that is modified by a calibration factor representing a proportion of the compound not being exposed to the gaseous substance, the method comprising: measuring values of the luminescence lifetime of the luminescent compound while the gas sensor is exposed to at least two known concentrations of the gaseous substance; and deriving the calibration factor from the measured values of the luminescence lifetime using the model. Also disclosed are a corresponding gas sensor apparatus for measuring the concentration of a gaseous substance in an environment, and method of measuring a concentration of a gaseous substance in an environment using a gas sensor.

A sensor comprising a randomly functionalised polyolefin having functional groups, a sensing compound and optionally a polar solvent, wherein the polyolefin has a crystallinity between 0 and 35%, as determined with DSC, and wherein the amount of monomeric moieties comprising functional groups is at least 0.1 mol %.

The present disclosure relates to a thermoplastic film that includes a layer of thermoplastic material and a color indicator applied to the thermoplastic material. The color indicator can be configured to change color in response to a trigger. For example, the color indicator can change color (e.g., change from a first color to a second color) in response to a color change trigger, such as exposure to malodor particles, absorption of moisture, a length of time, or as a result of oxidation. In one or more embodiments, the thermoplastic film further includes an odor control component configured to mask, neutralize, or otherwise control malodors. The color indicator can change its color appearance as the odor control component performs to control any present malodors, thus signaling the performance of the odor control component.

A tactical chemical detector may include a light array comprising a plurality of light sources; a sensor optic comprising a plurality of optic elements, each optic element in optical communication with one of the plurality of light sources; a sensor array comprising a plurality of sensors arranged on a substrate, each sensor in optical communication with one of the plurality of light sources and wherein at least one vent opening extends through the substrate; a power source configured to selectively provide power the light array and the sensor array; and a housing having a first side and a second side and enclosing the light array, the sensor optic, the sensor array, and the power source.

The present disclosure relates to a thermoplastic film that includes a layer of thermoplastic material and an encapsulated odor control component. The encapsulated odor control component can include an odor-control active encapsulated within an odor-control encapsulant. Additionally, the encapsulated odor control component can be configured to release the odor-control active from the encapsulant when exposed to malodor particles. The thermoplastic film can further include a color indicator that changes color to indicate performance of the encapsulated odor control component. For example, the color indicator can change from a first color to a second color based, at least in part, on the release of the odor-control active.

Quantifying nanobubbles in solution includes combining an indicator with a fluid comprising nanobubbles to yield a first solution, bursting the nanobubbles in the first solution to yield a second solution, and assessing a difference between the first solution and the second solution to yield a concentration of the nanobubbles in the first solution, a concentration of reactive oxygen species in the first solution or the second solution, or both.

An embodiment provides a method for measuring ozone in a sample, including: preparing a thiocarbamate-based indicator; introducing the thiocarbamate-based indicator to a sample, wherein the sample contains an amount of ozone and the introducing causes a change in fluorescence of the solution; and measuring the amount of ozone in the sample by measuring the change in intensity of the fluorescence. Other aspects are described and claimed.

An anthraquinone compound of formula I (such as the compounds of formulae II to X) and processes for making the same are provided. Pharmaceutical compositions for use in the treatment of cancer, optionally in combination with an agent capable of reducing the level of oxygenation of a tumour, are also provided. Additionally, an option for combination with chemotherapeutic and radiotherapeutic modalities to enhance overall tumour cell kill is provided. Methods for the detection of cellular hypoxia, both in vivo and in vitro, are additionally provided. ##STR00001##

An embodiment provides a method for measuring dissolved oxygen of an aqueous sample, including: introducing an aqueous sample into a measurement device comprising at least two dissolved oxygen sensors, wherein at least one of the at least two dissolved sensors comprises a trend sensor and at least another of the at least two dissolved sensors comprises a reference sensor; measuring a first value of dissolved oxygen using the trend sensor, wherein the trend sensor samples at a trend frequency; measuring a second value of dissolved oxygen from a reference sensor, wherein the reference sensor samples at a reference frequency, the reference frequency being less than the trend frequency; and correcting the first value of dissolved oxygen based upon the second value of dissolved oxygen. Other aspects are described and claimed.