Embodiments of the present invention relate to freshness indication. In some embodiments, a freshness indicating device is provided. The freshness indicating device comprises a collector and an indicator. The collector is adapted to collect water from an object. The object includes at least one of fruits and vegetables. The indicator is adapted to indicate the freshness of the object based on the amount of the collected water. A corresponding method and a container comprising the freshness indicating device are disclosed as well.

The invention relates to a method for measuring the concentration of a gas component in an atmosphere of a packaging which is made from a plastic film and which comprises a gas concentration indicator substance on the side of the plastic film facing the atmosphere.

A fluorescent oxygen sensing ink includes at least one organic solvent, at least one polymer binder disposed in the organic solvent, and an oxygen-sensitive fluorescent dye disposed in the organic solvent. The oxygen-sensitive fluorescent dye and the at least one polymer can interact to form a moisture-resistant film. The fluorescent oxygen sensing ink can be incorporated into an oxygen sensing wound dressing.

A self-supporting film (10) comprises a gas barrier layer (20); a semi-permeable layer (40); and an indicator material (30), preferably a colorimetric indicator material, is provided between the gas barrier layer (20) and the semi-permeable layer (40). The indicator material (30) is in direct contact with the gas barrier layer (20). The film (10) is particularly useful as an item of packaging, particularly in packaging for perishable materials.

Described is an oxygen permeable layer for detection of molecular oxygen, wherein the layer has a carrier material in which at least one particle is comprised, wherein the carrier material is polyvinylidene fluoride or a copolymer of polyvinylidene fluoride, and the particle comprises a polymer or a copolymer, wherein the polymer or copolymer of the particle has a chemically covalently bonded indicator compound for detection of molecular oxygen. In addition, a multilayer system for detection of molecular oxygen is described. Also described are a method for producing the layer, and the use of the layer or of the multilayer system for detection of molecular oxygen.

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 microtiter plate assembly is disclosed that includes a base having a plurality of wells and a lid having a plurality of projections corresponding to the plurality of wells. Each projection contains a radial notch and a canted distal tip, providing bubble free sealing, reduced oxygen back-diffusion, and increased sensitivity even at small sample volumes.

An oxygen content sensor includes a nanoparticle, a plurality of linkers, and a plurality of fluorescent molecules. The linkers are disposed on the nanoparticle. The fluorescent molecules are arranged on the linkers. The linker has at least a hydrophilic region as well as a hydrophobic region. The linker is linked to the nanoparticle through the hydrophilic region, and the fluorescent molecule is linked to the linker through the hydrophobic region.

A method for measuring an amount of dissolved oxygen contained in a liquid sample, including the steps of: (1) adding a deoxygenating amino compound to a liquid sample to prepare the liquid sample having a predetermined concentration of the deoxygenating amino compound; (2) after Step (1), heating the liquid sample containing the deoxygenating amino compound at a temperature of 80° C. or more; (3) after Step (2), measuring the concentration of the deoxygenating amino compound contained in the liquid sample; and (4) calculating the amount of the dissolved oxygen contained in the liquid sample in Step (1) from the amount of the reacted deoxygenating amino compound by comparing the concentration of the deoxygenating amino compound measured in Step (3) and the concentration of the deoxygenating amino compound measured in Step (1).

The present invention aims to develop a compound and a reagent having long phosphorescence lifetimes, for use in imaging of a hypoxic cell/tissue or for use in measurement/quantification of the oxygen concentration thereof. The present invention provides a reagent for measuring oxygen concentration, comprising a compound represented by the following General Formula (I) or (II).

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wherein R.sup.1 and R.sup.2 each independently represent hydrogen or a C.sub.1-C.sub.6 hydrocarbon group; and X.sup.− represents a counter anion.