Abstract:
PROBLEM TO BE SOLVED: To provide a liquid-uncontacting all-solid-state protein photoelectric conversion element capable of working even when a liquid such as water is not present in the interior or exterior of the element, and to provide a method of manufacturing the element. SOLUTION: The liquid-uncontacting all-solid-state protein photoelectric conversion element has a structure in which a solid protein layer 13 including an electron transport protein is sandwiched between an electrode 11 and an electrode 12. The solid protein layer 13 is immobilized on both the electrode 11 and the electrode 12. The solid protein layer 13 contains no liquid such as water. The solid protein layer 13 includes a monomolecular film or multi-molecular film of the electron transfer protein. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel cell for preventing deterioration of output characteristics, lifetime, and efficiency or the like and for improving maintenance rate of current by preventing elution of an electronic mediator fixed to a positive electrode together with an enzyme, and its manufacturing method. SOLUTION: A positive electrode 2 of a bio-fuel cell is manufactured by contacting a solution, in which a hydrophobic electronic mediator such as ferrocene is dissolved in an organic solvent having phase separation with water, on the surface of an electrode on which an enzyme is fixed, after the enzyme is fixed on the surface of the electrode with gaps inside, and fixing the hydrophobic electronic mediator on the surface of the electrode. As the organic solvent which carries out phase separation with water, methyl-isobutyl ketone or the like is used. By containing a water repellent material in this solution, the water repellent material is formed on the surface of the electrode to make it water repellent. Carbon powder or the like is used as the water repellent material. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a color imaging device and a photosensor that are stably usable for a long period with high definition and high sensitivity, and to provide a molecular device which is suitably used therefor. SOLUTION: A photoelectric conversion element is formed by immobilizing cytochrome c552 13 on a gold electrode 11 via a self-assembled molecular monolayer 12 and coupling an electron transfer protein 14 having a photoelectric conversion function to the cytochrome c552 13. Alternatively, a photoelectric conversion element for green light or blue light is formed by immobilizing zinc-substituted cytochrome c552 or zinc-modified porphyrin cytochrome c552 on the gold electrode. The color imaging device or photosensor is constituted using those photoelectric conversion elements. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide technology for actually generating power even when using highly safe and accessible material, such as, food and drink items or garbage as fuel for a bio fuel cell. SOLUTION: A fuel reformer is used for the fuel cell which produces an electromotive force with the progress of oxidation-reduction reaction using enzyme as a catalyst and includes, at least a primary fuel inlet part for introducing primary fuel; a fuel-reforming part communicating with the primary fuel inlet part for reforming the primary fuel into secondary fuel which can release electrons by the oxidation-reduction reaction by using the enzyme as the catalyst; and a secondary fuel supply part communicating with the fuel reforming part for supplying the secondary fuel to the fuel cell. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electrolytic process, by which reverse reaction of an enzyme can be suppressed and the electrolysis rate can be improved. SOLUTION: When fuel such as glucose is electrolyzed by using an enzyme/electron mediator 1 in which an enzyme such as gluconic acid-5-dehydrogenase, alcohol dehydrogenase and malic acid dehydrogenase, and an electron mediator are fixed to a porous electrode made of a carbon material or the like, the electrolytic reaction is induced only within the enzyme/electron mediator 1 electrode. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel cell that, when an enzyme is immobilized on at least one of a positive electrode and a negative electrode, can obtain satisfactory buffering capability even during high-output operation, can satisfactorily exhibit capability inherent in the enzyme, and has excellent performance. SOLUTION: The fuel cell is a biofuel cell having a structure comprising a positive electrode 2 and a negative electrode 1 arranged opposite to each other through an electrolyte layer 3 containing a buffering substance, an enzyme being immobilized on at least one of the positive electrode 2 and the negative electrode 2. An imidazole ring-containing compound is included as a buffering substance in the electrolyte layer 3. Further, at least one acid selected from a group consisting of acetic acid, phosphoric acid, and sulfuric acid is added. For the imidazole ring-containing compound, imidazole, 1-methylimidazole, 2-methylimidazole, 4-methylimidazole, or 2-ethylimidazole is used. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel cell capable of simply supplying fuel and efficiently generating electricity. SOLUTION: The fuel cell generates electricity by the progress of an oxidation-reduction reaction with an enzyme as a catalyst. The fuel cell includes at least a fuel vaporization layer formed by vaporizing fuel, a negative electrode to which the vaporized fuel is supplied from the fuel vaporization layer, and a positive electrode connected to the negative electrode in a proton conductible state. Since the fuel cell supplies fuel in a vaporized state to an electrode, the vaporized fuel is supplied into the electrode, the reaction on the inner surface of the electrode fully progresses, and thus higher output can be obtained by efficient generation of electricity. Since the fuel is supplied in the vaporized state to the electrode even when enzyme or the like is fixed to the electrode, the enzyme or the like can be prevented from being eluted into liquid fuel, and a reduction in output due to the elution of the enzyme or the like can be prevented. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electrode producing a reduced coenzyme, in a multi-stage manner from a given substrate. SOLUTION: The electrode contains at least 2-hydroxycarboxylic acid producing enzyme, 2-oxo acid producing enzyme and 2-oxo acid carboxy-lyase. Since this electrode has the 2-oxo acid carboxy-lyase which is a decarboxylase, as well as, the 2-hydroxycarboxylic acid producing enzyme and the 2-oxo acid producing enzyme which are oxidoreductases, an oxidation product having a carboxyl group which does not react with the oxidoreductases, can be decarboxylated and converted into a substance on which the oxidoreductases can act. Accordingly, oxidation reaction and decarboxylation reaction are allowed to proceed repeatedly for a given substrate, and a large amount of reduced coenzyme is produced, accompanying the proceeding of the reactions. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a biofuel cell capable of drastically improving a current density or an output density by optimizing concentration of an electronic mediator to be immobilized together with an enzyme to a cathode or an anode, and to provide a manufacturing method thereof. SOLUTION: The biofuel cell has a structure in which a positive electrode 2 and a negative electrode 1 are opposed to each other via an electrolyte layer 3 provided therebetween, at least either the positive electrode 2 or the negative electrode 1 made of an electrode on which at least one kind of enzymes and at least one kind of electron mediators are immobilized. A concentration of the electron mediator immobilized on the electrode is at least 10 times a Michaelis constant K m of the enzyme of the electron mediator, which is determined by measurement in solution. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel cell which widely improves an output by using an electronic mediator in which a potential can be raised while taking a large current value. SOLUTION: In the fuel cell including a structure having a fuel electrode 1 and an air electrode 3 facing to each other via an electrolyte layer 5 of a proton conductor, and an enzyme immobilization electrode in which at least fuel decomposition enzyme and an electronic mediator are immobilized to the fuel electrode 1, a concrete chemical constitution of the electronic mediator is specified. The electronic mediator are 2-amino -1, 4-naphthoquinone (ANQ), 2-methoxy -1, 4-naphthoquinone (MNQ), etc. COPYRIGHT: (C)2006,JPO&NCIPI