According to improvement of the receptor layer of various sensors of the type for detecting physical parameters (for example, a surface stress sensor, QCM, and SPR), all of high sensitivity, selectivity, and durability are achieved simultaneously. A porous material or a particulate material, e.g., nanoparticles, is used in place of a uniform membrane which has been conventionally used as a receptor layer. Accordingly, the sensitivity can be controlled by changing the membrane thickness of the receptor layer, the selectivity can be controlled by changing a surface modifying group to be fixed on the porous material or particulate material, and the durability can be controlled by changing the composition and surface properties of the porous material or particulate material.

The disclosure relates to system and method for determining at least one property of a porous medium and includes performing a first measurement on a sample of the porous medium obtaining an optical path through pores of the porous medium using a first sensor applied utilizing a first optical technology; performing a second measurement on the sample of the porous medium obtaining a total optical path through the porous medium using a second sensor utilizing a second optical technology different from the first optical technology; and calculating an optical porosity of the porous medium based on the optical path through the pores and the total optical path through the porous medium.

Method and compositions using transition metal salts and/or ammonium chloride to liberate toxins and other molecules from cyanobacteria, useful for assaying for total cyanobacterial toxins in lakes, reservoirs and other waters.

Method and compositions using transition metal salts and/or ammonium chloride to liberate toxins and other molecules from cyanobacteria, useful for assaying for total cyanobacterial toxins in lakes, reservoirs and other waters.

A sample measurement device includes: a sample container that stores a sample solution; a light source that irradiates the sample container with irradiation light from a first direction; an imaging part that captures an image of the sample solution based on light scattered by the sample solution from a second direction intersecting the first direction; and a calculator that calculates an absorbance or a concentration of the sample solution based on the image. The calculator calculates a degree of attenuation of a light amount of the image at a constant optical path length along the first direction based on the image, and calculates the absorbance or concentration of the sample solution according to the degree of attenuation.

Method and compositions using transition metal salts and/or ammonium chloride to liberate toxins and other molecules from cyanobacteria, useful for assaying for total cyanobacterial toxins in lakes, reservoirs and other waters.

A sample measurement device includes: a sample container that stores a sample solution; a light source that irradiates the sample container with irradiation light from a first direction; an imaging part that captures an image of the sample solution based on light scattered by the sample solution from a second direction intersecting the first direction; and a calculator that calculates an absorbance or a concentration of the sample solution based on the image. The calculator calculates a degree of attenuation of a light amount of the image at a constant optical path length along the first direction based on the image, and calculates the absorbance or concentration of the sample solution according to the degree of attenuation.

Method and compositions using transition metal salts and/or ammonium chloride to liberate toxins and other molecules from cyanobacteria, useful for assaying for total cyanobacterial toxins in lakes, reservoirs and other waters.

According to improvement of the receptor layer of various sensors of the type for detecting physical parameters (for example, a surface stress sensor, QCM, and SPR), all of high sensitivity, selectivity, and durability are achieved simultaneously. A porous material or a particulate material, e.g., nanoparticles, is used in place of a uniform membrane which has been conventionally used as a receptor layer. Accordingly, the sensitivity can be controlled by changing the membrane thickness of the receptor layer, the selectivity can be controlled by changing a surface modifying group to be fixed on the porous material or particulate material, and the durability can be controlled by changing the composition and surface properties of the porous material or particulate material.

The present invention relates to a monolith for processing fluid samples, and methods of making and using the monolith. The monolith can contain certain monomers or combinations of monomers that can be polymerized to give a polymeric monolith that can efficiently self-wick fluid. The self-wicking polymeric monolith can be used as a convenient tool for point of care/on site diagnostics and analytics. The monolith is easily stored and transported, comparatively cost-efficient to make, permits good detection of analyte molecules and is readily functionalizable by impregnation of and/or covalently grafting additional chemical moieties to either the whole monolith or in zones.