摘要:
An RTV organopolysiloxane composition is provided comprising (A) an organopolysiloxane having the formula: HO(R12SiO)xH wherein R1 is a monovalent hydrocarbon group and x is an integer of at least 10, (B) an alkoxysilane compound having on the average at least two silicon-bonded hydrolyzable groups and/or a partial hydrolyzate thereof, (C) organoxy titanium, and (D) an organic compound having at least one hydroxyl group bonded to a benzene ring. The color of the composition tinted with components (C) and (D) fades or changes upon curing of the composition, by which a degree of curing is visually observable. The composition has improved storage stability and resin adhesion.
摘要:
A room temperature curable organopolysiloxane composition comprising (A) a diorganopolysiloxane end-capped with a hydroxy or alkoxy group, (B) a silane crosslinker, (C) an aluminum hydroxide powder surface treated with a silane, siloxane or silazane, and (D) a platinum catalyst is shelf stable and smoothly extrudable prior to curing, and cures into a silicone rubber having long-lasting self-extinguishing properties. The composition is best suited as an adhesive to electrical and electronic parts.
摘要:
A silicone rubber composition for use in rubber construction materials contains dispersed particles having a photocatalytic activity. The particles are surface-treated with a compound that can easily be deteriorated by the photocatalytic activity under outdoor exposure to ultraviolet light. Rubber construction materials made of the cured form of the composition, when exposed to ultraviolet light, undergo surface hydrophilization that endows them with excellent stain resistance, and also have excellent sealing properties. When the composition is applied as a coating, filled into joints, or used as a solid gasket, it does not cause staining of the building, joints, or the area around joints.
摘要:
Disclosed herein is a method of removing the nitrogen oxides from the gases containing nitrogen oxides by contacting any such gas with ammonia at a temperature of from 100.degree. C. to 230.degree. C. in the presence of a catalyst so that a reaction takes place between the nitrogen oxides and ammonia. This reaction is conducted in such a manner as to prevent the by-produced ammonium nitrate from depositing on the catalyst. There is also disclosed a specific apparatus for practicing the method.
摘要:
An acetyl-CoA-producing microorganism, which is capable of efficiently synthesizing acetyl-CoA using carbon dioxide, and a substance production method using the same are provided. An acetyl-CoA-producing microorganism including an acetyl-CoA production cycle obtained by imparting at least one type of enzymatic activity selected from the group consisting of malate thiokinase, malyl-CoA lyase, glyoxylate carboligase, 2-hydroxy-3-oxopropionate reductase, and hydroxypyruvate reductase, to a microorganism.
摘要:
A method for producing D-lactic acid in high yield, and to provide a method for producing D-lactic acid with high selectivity, in which optical purity is high and a by-product organic acid is small. In one aspect, a microorganism, wherein activity of pyruvate formate-lyase (pfl) is inactivated or decreased, and further activity of Escherichia coli-derived NADH-dependent D-lactate dehydrogenase (ldhA) is enhanced, is cultured to efficiently produce D-lactic acid. With regard to a method for enhancing ldhA activity, by linking, on a genome, a gene encoding ldhA with a promoter of a gene which controls expression of a protein involved in a glycolytic pathway, a nucleic acid biosynthesis pathway or an amino acid biosynthesis pathway, suitable results are obtained compared to the method for enhancing expression of the gene using an expression vector. A microorganism in which a dld gene is substantially inactivated or decreased is cultured to produce high quality D-lactic acid with reduced concentration of pyruvic acid.
摘要:
The present invention provides: a lactic acid-producing Escherichia coli including an enzymatic activity of at least one NAD-dependent lactate dehydrogenase and an enzymatic activity of at least one NAD-independent lactate oxidoreductase, both of which are enhanced so as to decompose one of D-lactic acid or L-lactic acid and to produce the other one of D-lactic acid or L-lactic acid; and a lactic acid production method using the lactic acid-producing Escherichia coli.
摘要:
An image extraction device for extracting an image showing a document from an image of the document shot by an imaging device includes a document table on which a document is placed, a side detection unit, an opposing side estimator, and an image extraction unit. The side detection unit detects a side of the document on the document table based on the shot image of the document. The opposing side estimator estimates a position of a side opposite the side detected by the side detection unit. The image extraction unit segments the image of the document from the shot image of the document based on the side detected by the side detection unit and the opposite side estimated by the opposing side estimator.
摘要:
Disclosed is an Escherichia coli producing 2-deoxy-scyllo-inosose (DOI), which, from a sucrose non-PTS gene group, has at least a sucrose hydrolase (CscA)-encoding gene and which is provided with a DOI production system or has an enhanced DOI production system. The Escherichia coli preferably further includes a system to enhance sugar uptake capacity. There is also disclosed a method of producing DOI from a plant-derived raw material containing sucrose by using the Escherichia coli.
摘要:
An organopolysiloxane composition suited for magnesium alloy bonding comprises (A) a specific organopolysiloxane, (B) a non-reactive silicone oil, (C) zinc oxide surface treated with a silane or siloxane treating agent, (D) heavy calcium carbonate surface treated with a paraffin treating agent, (E) an organosilicon compound having at least three hydrolyzable radicals or a partial hydrolyzate thereof, (F) a silane coupling agent having at least one epoxy radical, and (G) a titanium chelate catalyst. The composition has improved chemical resistance.