摘要:
A novel electrocatalyst made of an oxidase having high electron transfer efficiency and an enzymatic electrode using the same are provided. The electrocatalyst is made of CueO. The enzymatic electrode comprises a carbonaceous porous body and an electrocatalyst made of CueO supported on the surface of the carbonaceous porous body. CueO is preferably CueO from Escherichia coli. The carbonaceous porous body constituting the enzymatic electrode is preferably carbonaceous gel. Also, the enzymatic electrode may further comprise a mediator which facilitates transfer of electron between the carbonaceous porous body and said CueO.
摘要:
A novel electrocatalyst made of an oxidase having high electron transfer efficiency and an enzymatic electrode using the same are provided. The electrocatalyst is made of CueO. The enzymatic electrode comprises a carbonaceous porous body and an electrocatalyst made of CueO supported on the surface of the carbonaceous porous body. CueO is preferably CueO from Escherichia coli. The carbonaceous porous body constituting the enzymatic electrode is preferably carbonaceous gel. Also, the enzymatic electrode may further comprise a mediator which facilitates transfer of electron between the carbonaceous porous body and said CueO.
摘要:
A carbon gel composite material including: a carbon gel which is composed of primary particles with an average particle diameter of 2 to 50 nm, where no x-ray diffraction peaks are observed over a scan angle (2θ) range of 0.5 to 10° (CuK60 radiation) and where in a pore size distribution calculated from an adsorption/desorption isotherm, if a pore diameter corresponding to the peak of the pore size distribution is not smaller than 1 nm and is smaller than 10 nm (pore diameter (d)), pores accounting for 60% or more of the total pore volume have a pore diameter within plus or minus 2 nm of the pore diameter (d), and if a pore diameter corresponding to the peak of the pore size distribution is in a range of 10 to 50 nm (pore diameter (D)), pores accounting for 60% or more of the total pore volume have a pore diameter in a range of (0.75×D) to (1.25×D); and at least one adsorbed component selected from the group consisting of proteins, metal complexes and metals, which is adsorbed on the carbon gel.
摘要:
The present invention provides: an oxidation reaction electrode that generates oxygen by oxidizing water; and a reduction reaction electrode that synthesizes a carbon compound by reducing carbon dioxide. The two electrodes are electrically connected. Also, the reduction reaction electrode (1) synthesizes a carbon compound by reducing carbon dioxide in a water-containing liquid using radiated light energy.
摘要:
A composition containing an extremely poorly water-soluble drug and obtained by treating, with a supercritical fluid or subcritical fluid of carbon dioxide, a mixture comprising a porous silica material and the extremely poorly water-soluble drug; and its production process. The porous silica material has an average pore diameter in a range of from 1 to 20 nm, pores having diameters within ±40% of the average pore size account for at least 60% of a total pore volume of the porous silica material, and in X-ray diffractometry, the porous silica material has at least one peak at a position of diffraction angle (2θ) corresponding to a d value of at least 1 nm.The composition according to the present invention, which contains the extremely poorly water-soluble drug, is excellent in the dissolution of the extremely poorly water-soluble drug.
摘要:
A composition containing an extremely poorly water-soluble drug and obtained by treating, with a supercritical fluid or subcritical fluid of carbon dioxide, a mixture comprising a porous silica material and the extremely poorly water-soluble drug; and its production process. The porous silica material has an average pore diameter in a range of from 1 to 20 nm, pores having diameters within ±40% of the average pore size account for at least 60% of a total pore volume of the porous silica material, and in X-ray diffractometry, the porous silica material has at least one peak at a position of diffraction angle (2θ) corresponding to a d value of at least 1 nm. The composition according to the present invention, which contains the extremely poorly water-soluble drug, is excellent in the dissolution of the extremely poorly water-soluble drug.
摘要:
In a valve structure of a hydraulic shock absorber for a vehicle structured by laminating a first leaf valve, a small-diameter leaf valve and a plurality of second leaf valves, an inner leaf valve is provided between a plurality of second leaf valves. An annular outer leaf valve having a larger thickness than that of the inner leaf valve is provided in an outer peripheral side of the inner leaf valve.
摘要:
A host-vector system suitable for production of human growth hormone (hGH) and a process for production of hGH using the same are provided. As an hGH expression plasmid, a recombinant DNA wherein a DNA coding for hGH is linked to the 3'-terminal of a DNA containing a promoter region derived from Bacillus brevis is provided, and as a host, especially a mutant Bacillus brevis substantially not exhibiting protease activity to hGH is provided. A microorganism obtained by transforming said host with said hGH expression plasmid efficiently produces hGH when it is cultured.
摘要:
A highly thermostable polypeptide possessing protein disulfide isomerase (PDI) activity, a gene coding for the polypeptide and a process for producing the polypeptide are provided. The polypeptide possessing PDI activity is characterized by A) having a capability of catalyzing a disulfide exchange in proteins, B) recognizing mainly ribonuclease A as a substrate, C) having a suitable active temperature of 20.degree. to 70.degree. C., D) being stable at a pH value of 6 to 9, and E) having a molecular weight of about 60,000 to 62,000. Since it has a higher thermostability and exhibits a stable activity in a wider dithiothreitol concentration range as compared with the conventional PDI, it is possible to provide a novel enzyme active protein which can be advantageously used for a refolding reaction of certain proteins. Further, a process which enables the polypeptide possessing PDI activity to be efficiently produced using Humicola insolens or a transformant transformed with an expression vector containing the above-described gene is also provided.
摘要:
To provide a photocatalyst having high selectivity and carrying out a reductive reaction with light having a longer wavelength. A photocatalyst has a structure in which a semiconductor and a substrate are joined, in which the substrate causes a catalytic reaction by transfer to the substrate of excited electrons, which are generated by applying light to the semiconductor.