Japan Science and Technology Agency

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Patent
Japan Science and Technology Agency | Date: 2017-05-17

As a technique for efficiently sealing many substances, such as beads, nucleic acid, protein, virus, cells, and lipid membrane complex, into an array, the present invention provides a method for sealing a substance, including: (i) a step of introducing a first solvent containing a substance on a substrate on which a plurality of receptacles capable of storing the substance are formed separated from each other by a side wall; and (ii) a step of introducing a second solvent having a greater specific gravity than that of the first solvent onto the first solvent, the step (ii) being carried out after the step (i).


Provided is a block copolymer that makes it possible to produce inorganic nanoparticles that can be dispersed in an organic solvent, the inorganic nanoparticles being of uniform size and a reducing agent not having to be used. A block copolymer including a catechol segment represented by formula (1).


Patent
Japan Science and Technology Agency | Date: 2017-01-18

Provided is a transistor including: a piezoresistor 10 through which carriers conduct; a source 14 that injects the carriers into the piezoresistor; a drain 16 that receives the carriers from the piezoresistor; a piezoelectric material 12 that is located so as to surround the piezoresistor and applies a pressure to the piezoresistor; and a gate 18 that applies a voltage to the piezoelectric material applies so that the piezoelectric material applies a pressure to the piezoresistor.


Patent
Japan Science and Technology Agency | Date: 2017-04-05

An inverse photoemission spectroscopy apparatus is configured to detect a light generated by the relaxation of electrons to an unoccupied state of a sample.The apparatus includes an electron source for generating electrons with which a sample is irradiated, a wavelength selector for extracting a light having a certain wavelength from the light generated in the sample, a photodetector for detecting the light extracted by the wavelength selector; and a focusing optics disposed between the sample and the photodetector. The electron source contains yttrium oxide as a thermionic emission material.


Patent
Japan Science and Technology Agency | Date: 2017-01-04

Provided is an optical network which makes it possible to increase frequency use efficiency of an optical signal when transmitting wavelength division multiplexed light. One or more optical path cross connection devices (OXC) through which a wavelength division multiplexed light signal travels when being transmitted from a prescribed transmission node to a prescribed receiving node, wherein when an optical channel inputted from an input optical fiber (Fi1-Fin) is routed or switched to one or more output optical fibers (Fo1-FoN), a plurality of optical channels adjacent on a frequency axis which are outputted to the same output optical fiber (FoN) in the input optical fibers (Fi1-Fin) are routed or switched to an output optical fiber by demultiplexing the plurality of optical channels as one bundle without demultiplexing each of the optical channels individually. Thus, it is possible to increase frequency use efficiency of an optical signal when transmitting wavelength division multiplexed light, because the instances of optical channel filtering are reduced and the loss caused by filtering is decreased.


Patent
Japan Science and Technology Agency | Date: 2017-01-04

The present invention provides a thermal emission source capable of switching the intensity of light at a high response speed similarly to a photoelectric conversion element. A thermal emission source 10 includes: a two-dimensional photonic crystal 12 including a slab 11 in which an n-layer 112 made of an n-type semiconductor, a quantum well structure layer 114 having a quantum well structure, and a p-layer 111 made of a p-type semiconductor are stacked in the mentioned order in the thickness direction, wherein modified refractive index areas (air holes 121) whose refractive index differs from the refractive indices of the n-layer 112, the p-layer 111 and the quantum well structure layer 114 are cyclically arranged in the slab 11 so as to resonate with a specific wavelength of light corresponding to a transition energy between the subbands in a quantum well in the quantum well structure layer 114; and a p-type electrode 131 and an n-type electrode 132 for applying, to the slab 11, a voltage which is negative on the side of the p-layer 111 and positive on the side of the n-layer 112.


A method for authenticating a security mark containing a photochromic compound can provide higher security performance. The method comprises a process of irradiating a security mark containing a photochromic compound with excitation light, a process of acquiring first security information on a time-dependent change in the absorption spectrum and/or reflection spectrum of the security mark after the irradiation with excitation light, and a process of checking the acquired first security information against previously acquired first security information on the security mark. In this method, the security mark preferably contains two or more photochromic compounds different from one another in color development and/or in quenching rate after the color development in a photochromic reaction.


An object is to provide a flow pattern regular expression creating method, a regular expression creating apparatus, and a program enabling provision of a new representation method enabling one-to-one correspondence to a flow pattern. A regular expression creating method of creating a regular expression of a flow pattern in a multiply connected exterior domain with N (N is an integer equal to or larger than 1) holes topologically includes a graph representation creating step of creating a graph representation having one-to-one correspondence to the flow pattern; and a regular expression creating step of creating a regular expression from the graph representation that is created at the graph representation creating step.


Provided is a mechanochromic resin by which a stress applied to a material can be visualized in real time, and a mechanochromic luminescent material that is used in the synthesis of the mechanochromic resin. Stress can be visualized in real time by means of a mechanochromic luminescent material represented by formula (1) or formula (2) and a mechanochromic resin obtained by crosslinking the mechanochromic luminescent material. [Chemical formula 1] (In the formula, Y_(1) and Y_(2) each denote a substituent group that inhibits aggregation of the mechanochromic luminescent material represented by formula (1), and Y_(1) and Y_(2) may be same as or different from each other. Z_(1) and Z_(2) each denote a polymerizable group, and may be same as or different from each other.) [Chemical formula 2] (In the formula, Y_(1) and Y_(2) each denote a substituent group that inhibits aggregation of the mechanochromic luminescent material represented by formula (2), and Y_(1) and Y_(2) may be same as or different from each other. Z_(1) and Z_(2) each denote a polymerizable group, and may be same as or different from each other.)


Patent
Japan Science and Technology Agency | Date: 2017-09-27

The present invention provides a method for easily and exponentially amplifying circular DNA, particularly long chain circular DNA, in a cell-free system. Specifically, the present invention provides a method for amplifying circular DNA in which circular DNA having a replication origin sequence (origin of chromosome (oriC)) is mixed with a reaction solution containing the following enzyme groups to form a reaction mixture, which is then reacted under an isothermal condition, the enzyme groups being:(1) a first enzyme group that catalyzes replication of circular DNA;(2) a second enzyme group that catalyzes an Okazaki fragment maturation and synthesizes two sister circular DNAs constituting a catenane; and(3) a third enzyme group that catalyzes a separation of two sister circular DNAs.

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