Abstract: The present invention relates to a system for detecting a target enzyme in a sample, the system including a substrate, a first enzyme immobilized on the substrate via a first linker, and a second enzyme immobilized on the substrate via a second linker, wherein the first linker is cleavable by the target enzyme or the second enzyme to release the first enzyme for cleaving the second linker, thereby releasing the second enzyme; and a method for detecting a target enzyme in a sample including applying the sample to said system.

Abstract: A method and an apparatus for determining a presence or an amount of a polyamine or its derivative in a sample, the method including: applying the sample on an electrochemical detector having a substance selection structure, wherein the substance selection structure is sensitive to the polyamine or its derivative; applying at least one voltage bias to the electrochemical detector; and detecting a change of electrical characteristics of the electrochemical detector so as to determine the presence or the amount of the polyamine or its derivative in the sample.

Abstract: A method and an apparatus for determining a presence or an amount of a polyamine or its derivative in a sample, the method including: applying the sample on an electrochemical detector having a substance selection structure, wherein the substance selection structure is sensitive to the polyamine or its derivative; applying at least one voltage bias to the electrochemical detector; and detecting a change of electrical characteristics of the electrochemical detector so as to determine the presence or the amount of the polyamine or its derivative in the sample.

Abstract: A chemosensing hydrogel is provided that undergoes a colorimetric reaction in response to the detection of a biogenic amine vapor, such as a biogenic amine vapor that is a by-product resulting from food spoilage. In an embodiment, an apparatus for detection of biogenic amines, is provided that includes a hydrogel having a bimetallic iron(II)-iron(III) complex disposed within the hydrogel, wherein the hydrogel is configured to change from a first color to a second color in response to exposure to a biogenic amine.

Abstract: A chemosensing hydrogel is provided that undergoes a colorimetric reaction in response to the detection of a biogenic amine vapor, such as a biogenic amine vapor that is a by-product resulting from food spoilage. In an embodiment, an apparatus for detection of biogenic amines, is provided that includes a hydrogel having a bimetallic iron(II)-iron(III) complex disposed within the hydrogel, wherein the hydrogel is configured to change from a first color to a second color in response to exposure to a biogenic amine.

Abstract: Disclosed are a solvatochromic functional monomer having the chemical structure and a process for preparing the same. The solvatochromic functional monomer can be used for fabrication of molecularly imprinted polymer based (MIP-based) solvatochromic chemosensors. This involves the incorporation of the solvatochromic functional monomer as reporter into the molecularly imprinted polymer. The solvatochromic functional monomers as reporters signal the analyte-to-receptor displacing event within the receptor sites without the need for intermolecular interaction between the analyte and the receptor.

Abstract: The invention relates to using heterobimetallic coordination polymers and their uses as chemodosimeters for sensing materials for the screening of specific biogenic amines.

Abstract: The invention relates to using heterobimetallic coordination polymers and their uses as chemodosimeters for sensing materials for the screening of specific biogenic amines.

Abstract: The present invention relates to a solvatochromic functional monomer having the chemical structure as shown in the accompanying drawing (FIG. 3), and a process for preparing the solvatochromic functional monomer (FIG. 2). The solvatochromic functional monomer can be used for fabrication of molecularly imprinted polymer based (MIP-based) solvatochromic chemosensors. This involves the incorporation of the solvatochromic functional monomer as reporter into the molecularly imprinted polymer. The solvatochromic functional monomers as reporters signal the analyte-to-receptor displacing event within the receptor sites without the need of intermolecular interaction between the analyte and receptor. The invention also relates to a MIP-based solvatochromic chemosensing approach. This involves the combination of solvatochromism and molecular imprinting technique in the chemosensing of target analytes.