摘要:
A method for generating plasma and a method for elemental analysis, each comprising the steps of providing a narrow portion in a flow channel made of an insulation material, the narrow portion having a cross-sectional area markedly smaller than a cross-sectional area of the flow channel; filling the flow channel and the narrow portion with a conductive liquid, and thereafter applying an electric field to the narrow portion, to conduct the electric field through the narrow portion, thereby generating plasma at the narrow portion. An apparatus for generating plasma, the apparatus for generating plasma comprising a narrow portion in a flow channel made of an insulation material, the narrow portion having a cross-sectional area markedly smaller than a cross-sectional area of the flow channel; and a means of applying an electric field to the narrow portion to conduct the electric field through the narrow portion; and an apparatus for emission spectroscopic analysis comprising the apparatus for generating plasma as defined above.
摘要:
A psychrophilic protease is here disclosed which has the following physicochemical properties: (a) specific activity and substrate specificity: the protease acts on casein, gelatin, hemoglobin and albumin to specifically decompose them, and the substrate specificity decreases in the order of casein, gelatin, hemoglobin and albumin; (b) optimal pH: 8.0; (c) pH stability: the protease is stable in the range of pH 6.5 to pH 10.0 at 30° C. for 1 hour; (d) optimal temperature: about 40° C.; (e) temperature stability: at pH 7 for 1 hour, the protease is active at a temperature up to 30° C., but it is inactivated at 40° C. as much as about 40% and completely inactivated at 50° C. in about 10 minutes; (f) enzyme activity: the protease has 50% or more of its maximum activity at about 20° C.; (g) the active center of the enzyme is serine; and (h) the molecular weight of the protease is about 70 kDa as measured by SDS-PAGE.
摘要:
A chip useful for treating cells and the like which has a mechanism and a structure wherein the size of a hole pattern is arbitrarily changed so that cells can easily move in and get out from the hole in scattering or collecting cells but can hardly get out from the hole during washing or antigen-stimulation. The chip comprises a crosslinked product of a temperature-responsive polymer as a constituting member and being provided with a film having a hole pattern on the surface of a baseboard. A method of producing the chip comprises applying a composition containing a crosslinkable temperature-responsive polymer on the surface of a baseboard to thereby form a coating film, crosslinking the coating film to thereby form the crosslinked product as described above and then forming a hole pattern on the coating film of the crosslinked product.
摘要:
A microwell array chip that has multiple microwells and is employed to contain a single lymphocyte specimen in each microwell and detect antigen-specific lymphocytes in single units; wherein the microwell array chip is of a shape and of dimensions where only one lymphocyte is contained in each microwell. A method of detecting antigen-specific lymphocytes comprising the steps of adding antigen to each microwell in the above microwell array chip, stimulating the lymphocyte specimen, and detecting lymphocyte specimens reacting with the antigen.
摘要:
The absorbance of samples in a number of wells on a microchamber array is efficiently read in a short period of time. The microchamber array is simultaneously irradiated with monochromatic light. Well-transmitted light is captured via a telecentric optical system (23) by an imaging camera (24) as an image, and the absorbance of the sample in each well is individually calculated.
摘要:
The absorbance of samples in a number of wells on a microchamber array is efficiently read in a short period of time. The microchamber array is simultaneously irradiated with monochromatic light. Well-transmitted light is captured via a telecentric optical system (23) by an imaging camera (24) as an image, and the absorbance of the sample in each well is individually calculated.
摘要:
A microchip used for a method for centrifugally dispensing a liquid sample by giving a revolving motion and a rotating motion to a rotary disk on which the microchip is mounted, includes a solution-pouring portion at a center thereof onto which the liquid sample is poured and channel patterns extending outward, with the solution-pouring portion as a center, and forming therein flow paths for the liquid sample and detection chambers which constitute portions for examining the liquid sample and in which the liquid sample is centrifugally dispensed. A centrifugal dispensing method using the microchip includes giving a revolving motion and a rotating motion to the rotary disk on which the microchip is mounted, thereby centrifugally dispensing the liquid sample in the detection chambers. A centrifugal dispenser using the microchip includes a rotary disk on which the microchip is mounted, means for revolving the rotary disk about a shaft and means for rotating the rotary disk about another shaft of the rotary disk.
摘要:
A gene detection tool comprising a sealable reaction chamber and a sealable detection chamber and a partition member positioned between the reaction chamber and the detection chamber that separates the reaction chamber and the detection chamber. The partition member is capable of unsealing; the reaction chamber is comprised of at least two members capable of forming a sealed reaction chamber by mutually fitting an opening means provided therein; and the detection chamber or reaction chamber comprises a gene detection element. A gene detection method in which a gene amplification operation and a gene detection operation are conducted in a sealed state using a gene detection device comprising a sealable reaction chamber and a sealable detection chamber, having a partition member which is positioned between the reaction chamber and the detection chamber and which separates the reaction chamber from the detection chamber, with test sample and gene amplification reaction solution being packed in said reaction chamber and a gene-binding agent capable of binding with a gene and generating a detectable signal being packed in said detection chamber. (1) At least the reaction chamber is imparted with conditions capable of amplifying the gene to be detected; (2) following the operation of (1), the partition member is unsealed while maintaining the gene detection tool in a sealed state; (3) through a passage created in the partition member by the unsealing, the solution in the reaction chamber is brought into contact with the gene-binding agent capable of binding the gene in the detection chamber and generating a detectable signal; and (4) the signal obtained is detected. A gene detection kit comprising the gene detection tool, a gene amplification reaction solution or gene amplification reagent, and a gene-binding agent capable of binding a gene and generating a detectable signal.