摘要:
Provided are: a uniformly, highly dispersed metal catalyst including a catalyst carrier and a catalyst metal being loaded thereon dispersed throughout the carrier, the uniformly, highly dispersed metal catalyst having excellent performances with respect to catalytic activity, selectivity, life, etc.; and a method of producing the same. The uniformly, highly dispersed metal catalyst includes a catalyst carrier made of a metal oxide and a catalyst metal having catalytic activity, the catalyst metal being loaded on the catalyst carrier, in which the catalyst carrier is a sulfur-containing catalyst carrier having sulfur or a sulfur compound almost evenly distributed throughout the carrier and the catalyst metal is loaded on the sulfur-containing catalyst carrier in a substantially evenly dispersed manner over the entire carrier substantially according to the distribution of the sulfur or the sulfur compound.
摘要:
A porous spinel type oxide shows a large surface area and a uniform micro-porous structure. The oxide is expressed by general formula MO—Al2O3 and shows a surface area per unit weight of not less than 80 m2/g. Such a porous spinel type compound oxide is obtained by impregnating a specific &ggr;-alumina carrier with a solution of a compound of metal element M capable of taking a valence of 2, drying the impregnated carrier and calcining it at a temperature of 600° C. or higher. The specific &ggr;-alumina carrier shows a surface area per unit weight of not less than 150 m2/g, a micro-pore volume per unit weight of not less than 0.55 cm3/g and an average micro-pore diameter between 90 and 200 angstroms. The micro-pores with a diameter between 90 and 200 angstroms occupy not less than 60% of the total micro-pore volume of the carrier.
摘要:
This invention relates to a method for producing a plant having resistance against RNA viruses by integrating a DNA sequence, which encodes a protein having an enzyme activity specifically breaking down a double-strand RNA, into a chromosome of a plant and making the DNA sequence express in the plant cells; and a plant having resistance against RNA viruses obtained according to the above method.A plant according to the present invention has resistance against plural RNA viruses.
摘要:
Provided is a method for producing hydrogen aimed at storage and transportation, by which hydrogen for storage and transportation that is necessary for smoothly performing an organic chemical hydride method can be industrially produced efficiently at low cost. The method is a method for producing hydrogen aimed at storage and transportation in an organic chemical hydride method, in which: the hydrogenation process of an aromatic compound uses, as a hydrogen source for the reaction of the aromatic compound, a reaction gas is produced by a reforming reaction and adjusted a hydrogen concentration from 30 to 70 vol % by a shift reaction; and a hydrogenated aromatic compound is separated from a reaction mixture obtained in the hydrogenation process, which is followed by purification.
摘要:
Provided are: a uniformly, highly dispersed metal catalyst including a catalyst carrier and a catalyst metal being loaded thereon dispersed throughout the carrier, the uniformly, highly dispersed metal catalyst having excellent performances with respect to catalytic activity, selectivity, life, etc.; and a method of producing the same. The uniformly, highly dispersed metal catalyst includes a catalyst carrier made of a metal oxide and a catalyst metal having catalytic activity, the catalyst metal being loaded on the catalyst carrier, in which the catalyst carrier is a sulfur-containing catalyst carrier having sulfur or a sulfur compound almost evenly distributed throughout the carrier and the catalyst metal is loaded on the sulfur-containing catalyst carrier in a substantially evenly dispersed manner over the entire carrier substantially according to the distribution of the sulfur or the sulfur compound.
摘要:
The present invention relates to a plant virus vector comprising a foreign gene linked downstream of a coat protein gene of tobacco mosaic virus via a nucleotide sequence which cause the readthrough, and a plasmid which is transcribed to provide the vector, as well as a process for expression of a foreign gene in a plant by inoculating the plant with the vector.In addition, the present invention relates to a process for efficiently recovering a foreign gene product produced in a plant as virions.
摘要:
In a method of producing dialkylcarbonate, alcoholic compound and cyclo-carbonate are subjected to a catalytic reaction each other at a reaction temperature of 20.degree. to 200.degree. C. and under a pressure of 0 to 40 kg/cm.sup.2 G, which keeps the reaction system liquid, in the presence of ion exchanged zeolite which is ion-exchanged with alkali metal ion and/or alkaline earth metal ion.
摘要:
Provided is a method for producing hydrogen aimed at storage and transportation, by which hydrogen for storage and transportation that is necessary for smoothly performing an organic chemical hydride method can be industrially produced efficiently at low cost. The method is a method for producing hydrogen aimed at storage and transportation in an organic chemical hydride method, in which: the hydrogenation process of an aromatic compound uses, as a hydrogen source for the reaction of the aromatic compound, a reaction gas is produced by a reforming reaction and adjusted a hydrogen concentration from 30 to 70 vol % by a shift reaction; and a hydrogenated aromatic compound is separated from a reaction mixture obtained in the hydrogenation process, which is followed by purification.
摘要:
A gas separation process and a unit therefor. The process comprises the steps of: introducing a gas consisting of two or more components into an adsorption system in which adsorbent particles circulate in a fluidized state, thereby to allow, at atmospheric pressure or an elevated pressure, the adsorbent particles to adsorb a gas component to be separated from the gas; transferring the adsorbent particles adsorbing the gas component to a desorption system; and then desorbing the gas component from the adsorbent particles in the desorption system which is regulated to have either a lower pressure or a lower pressure and a higher temperature than the adsorption system.
摘要:
A redox battery electrolyte is prepared from a chromium and/or iron base raw material containing nickel as impurities by dissolving the raw material in a hydrochloric acid-containing aqueous liquid to form a solution containing chromium ions and/or iron ions and nickel ions, the resulting solution being subjected to a cathodic reduction in the presence of lead ions until the electric potential thereof becomes lower than -0.6 V vs. saturated calomel electrode, thereby to remove the nickel ions therefrom.