135results about How to "Stable life" patented technology

The invention relates to a method for preparing propylene oxide, which adopts hydrogen peroxide as an oxidizer under the existence of a solvent and prepares propylene oxide through epoxiding propylene. The method of the invention is characterized in that in the method, the active element of catalyst is a Ti-Si molecular sieve with MFI structure, and the crystalline grain of the molecular sieve is hollow in structure; the radial length of the hollow part of the hollow crystalline grain is 5 to 300nm; under the conditions of 25 DEG C, P/P0 being equal to 0.10 and adsorption time being one hour, the adsorptive capacity of the molecular sieve sample tested is at least 70mg/g, and a hysteresis loop exists between the adsorption isotherm and the desorption isotherm absorbed by cryogenic nitrogen of the molecular sieve. The catalyst agent of the method has good stability, and also the method has high selectivity of propylene oxide, high utilization rate of hydrogen peroxide with mild reaction condition and easy operation.

A spectrophotometer includes a plurality of LEDs arranged in a circular array, each having a calibrated power input determined by the use of pulse width modulation and each having a unique wavelength band determined by the utilization of a unique fluorescent phosphor coating or lens. At least one of the LEDs comprising a phosphor-free high energy UV LED. Light reflected to the spectrophotometer is divided into predetermined wavelength ranges through the utilization of a linear variable filter and photo detectors wherein the analog signal from a photo detector is converted to a digital value through the use of auto-ranging gain technique.

The present invention provides for a topical composition that includes a topical carrier and an adenosine deaminase inhibitor. Suitable specific adenosine deaminase inhibitors include, e.g., deoxycoformycin (dCF), deoxyadenosine (dAdo), cladrabine (CdA), fludarabine (F-Ara-A), cytrabine (Ara-C), and thioguanine. The present invention also provides for a method to treat lymphocyte mediated skin diseases and to alleviate symptoms associated with such skin diseases. The method includes topically administering the composition to a mammal in need of such treatment. The present invention also provides for kits and syringe systems that include the adenosine deaminase inhibitor.

The present invention is one kind of high molecular plastic alloy powder for hot molten anticorrosive thick lining. The high molecular plastic alloy powder consists of linear low density polyethylene, isotatic polypropylene, chlorinated polyether, ultrahigh molecular weight polyethylene, white carbon black powder and other eight kinds of material. The high molecular plastic alloy powder has reasonable composition, anticorrosion, antistatic, antiageing, antiwear, environment friendship and other advantages.

The invention discloses a touch screen touch point location detection circuit, a touch screen and a display device. The touch screen touch point location detection circuit, the touch screen and the display device aim at achieving an optical type embedded type touch screen. The detection circuit comprises a touch sensing sub circuit, a detection sub circuit connected with the touch sensing sub circuit, and a first touch drive electrode wire and a second touch drive electrode wire. The touch sensing sub circuit comprises a capacitor, a first switch transistor and a second switch transistor. A grid and a source electrode of the first switch transistor are connected with the touch drive electrode wire. A drain electrode of the first switch transistor is connected with a drain electrode of the second switch transistor. A source electrode of the second switch transistor is connected with the detection sub circuit. A grid of the second switch transistor is connected with the second touch drive electrode wire. One end of the capacitor is connected with the drain electrode of the first switch transistor. The other end of the capacitor is connected with an electrode wire which provides high level voltage. The first switch transistor is an optical switch transistor.

A nitride semiconductor laser element comprises a nitride semiconductor substrate and a nitride semiconductor layer laminated thereon, wherein the nitride semiconductor substrate has a high dislocation density region and a low dislocation density region containing lower dislocation than that of the high dislocation density region, and has at least one recess formed in at least the high dislocation density region, the nitride semiconductor layer has a first nitride semiconductor layer in which the grown film thickness in the lateral direction from the side faces of the recess in the substrate is greater than the grown film thickness in the heightwise direction from a region other than the recess, and a second nitride semiconductor layer that is disposed on the first nitride semiconductor layer and contains indium, and the first nitride semiconductor layer and second nitride semiconductor layer have recess over the recess in the nitride semiconductor substrate.

The invention provides a preparation method of an aromatic compound hydrogenation rhodium/activated carbon catalyst. The preparation method comprises the following steps: I, pretreating activated carbon; II, dissolving soluble salts of a soluble rhodium compound and an additive into a solvent so as to obtain a precursor solution; III, atomizing and dispersing the precursor solution, adding into the activated carbon, uniformly stirring so as to obtain slurry, adjusting the pH value of the slurry, filtering, and washing; IV, pulping with pure water, performing reduction treatment, and performing treatment of filtration, washing and drying in sequence, thereby obtaining the aromatic compound hydrogenation rhodium/activated carbon catalyst. The invention further provides an application method of the catalyst. The catalyst prepared by using the method consists of activated carbon and metal components loaded on the activated carbon, the metal components are rhodium and an additive, the catalyst is applicable to catalytic hydrogenation of aromatic compounds, the product yield is higher than 95%, and the catalyst is stable in property and very high in repeatability.

The invention discloses a chloroethylene preparation method by catalytic cracking by a barium chloride catalyst. The method comprises the following steps: introducing dichloroethane into a fixed bed reactor with an active carbon-barium chloride catalyst; and separating the reaction products to obtain products of hydrogen chloride and liquid chlorine ethylene. Compared with an existing chloroethylene preparation method, the method provided by the invention has the following obvious merits: the invention solves problems of low conversion rate, poor selectivity and high energy consumption of dichloroethane high temperature pyrolysis, and greatly reduces operating costs for the subsequent dichloroethane recovery and rectification separation. The efficient activated carbon catalyst has stable life, good selectivity and low price, and can be effectively used in industrial production. Therefore, the invention is a highly efficient, energy-saving and emission-reduced technology.

An apparatus and method for discharging vapocoolants in stream or mist form includes the use of selected fluoroelastomers for valve parts to regulate discharge. The fluoroelastomers provide long-term stability to the vapocoolants to enable superior shelf life without minimal loss or contamination of the vapocoolant. In addition, a filter is provided to remove contaminants from vapocoolant prior to passage through the nozzle opening.

The invention discloses a catalytic cracking process for producing vinyl chloride by using active carbon as an accelerant. The method comprises the following steps: introducing dichloroethane into a fixed bed reactor with activated carbon catalyst, and separating the reaction products to obtain products of hydrogen chloride and liquid vinyl chloride. A preparation method of the active carbon catalyst comprises the following steps: pretreating coaly activated carbon, shell activated carbon or coconut shell activated carbon, and drying at a temperature of 80-100 DEG C for 20h-24h; and then activating in an atmosphere with nitrogen as a protective gas at a temperature of 200-250 DEG C for 10-24 h, so as to obtain the activated carbon catalyst. The invention solves problems of low conversion rate, poor selectivity and high energy consumption of dichloroethane high-temperature pyrolysis, and greatly reduces operating costs on the subsequent recovery and rectification separation of dichloroethane.

The invention discloses a novel fuel cell manufacturing method based on a graphene thermoelectric management layer. The method comprises the following steps: forming a micron-grade concave-convex structure on a proton exchange membrane; preparing a catalytic layer on the surface of the proton exchange membrane with the concave-convex structure; preparing the thermoelectric management layer on the surface of the catalytic layer; preparing a diffusion layer on the surface of the thermoelectric management layer; and manufacturing a single cell in a flow field fixture. The thermoelectric management layer based on graphene has ultrahigh electronic conductivity and ultrahigh heat conductivity, so that electrons generated in an electrochemical reaction process of the fuel cell catalytic layer and required electrons can be exported and imported rapidly; electrochemical polarization and ohmic polarization are reduced; and the output performance is enhanced. Moreover, a large amount of waste heat generated by a catalyst can be discharged rapidly, and a stable electrochemical reaction is maintained. Meanwhile, the temperature and an electric field in the catalytic layer can be balanced, and the service life is prolonged. Moreover, a manufacturing process is simple and controllable, and suitable for industrial production.

An etchant which includes an aqueous solution of between about 30% and about 38% concentrated hydrogen peroxide, said percentages being by volume, based on the total volume of the solution; between about 3.5 ml and about 20 ml per liter of phosphoric acid; and an amount of potassium hydroxide to adjust the pH of the solution to between about 7.8 and about 9.1. The etchant is useful in removing a layer of an alloy of titanium and tungsten or a layer of tungsten from a precision surface.

By using an amine hydrochloride represented by the formula (1) as a catalyst, a polythiourethane resin which is suitably used for a transparent resin for optical use, can be obtained without using an organotin compound which has been conventionally used as a catalyst for polythiourethane resins and without being affected by the acidity of an additive:

An oromucosally absorbable liquid composition for administration to a human patient comprises one liquid containing a pH-sensitive pharmaceutically active together with one or more optional suitable pharmaceutical excipients in a first compartment; and a second liquid at pH greater than 5 containing a buffer or alkaline components together with one or more optional suitable pharmaceutical excipients in a second distinct compartment; the first and second compartments maintaining separation of the first and second liquids during storage and allowing for mixing of the two liquids to form an oromucosally absorbable composition at the point of use

Compositions are provided that improve overall plant vigor and yield by combining agriculturally effective amounts of at least one environmentally friendly biological control agent and at least one chemical fungicide. A composition of the present invention is particularly effective in the presence of fungal species. Use of a composition of the present invention leads to an overall reduction in crop losses caused by fungi and this reduction is much greater than would have been expected from application of either component alone. Methods for utilizing compositions of the present invention are also provided. Further the compositions according to this invention display synergistic insecticidal and/or fungicidal activity.

The invention discloses a balancing piston seal assembly of a mud pulser. The balancing piston seal assembly comprises an outer shell, a balancing piston, a lifting rod, a piston, a guide pipe and a top plug. The balancing piston is arranged in the outer shell, the interior of the outer shell is divided into a mud chamber and an oil chamber, the top plug is arranged in the mud chamber and provided with a mud flowing channel, the mud flowing channel is communicated with the mud chamber, the guide pipe penetrates through the balancing piston and is connected with the top plug, the lifting rod penetrates through the guide pipe and the top plug and stretches out of the top plug, and the position, at one end of the oil chamber, of the lifting rod and the piston are connected. The problems that a traditional rubber cup is not resistant to high temperature, the wall is thin and prone to being broken, fatigue strength is low, and the rubber cup is nondurable are solved, mud can be prevented from entering the pulser and damaging the pulser, the service life of the pulser is prolonged, and the assembly is resistant to high temperature, not prone to being punctured and deforming, good in sealing performance, long in service life, reliable and stable.

The invention provides a light-emitting device with a ceramic substrate difficult to generate warping due to heat. The light-emitting device (10) is provided with an insulating base body (11), a right side metal component (12), a semiconductor light-emitting element (13), and a back side metal component (14). The insulating base body is ceramic. The right side metal component (2) is separated anddisposed on the surface (installation surface (11A)) of the insulating base body (11). The semiconductor light-emitting element (13) is installed on the right side metal component (12). The back sidemetal component (14) is disposed at the back side (11B) of the insulating base body (11) and is thinner than thickness of the right side metal component (12), the ratio of the volume of the back siderelative to the volume of the right side metal component (14) is higher than 50%.

There are provided personal care products and compositions that comprise at least one diol compound selected from the group consisting of 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 2-methyl-1,3-propandiol, and 3-(2-ethyl-hexyloxy)-1,2-propandiol in a total concentration of 0.1% to 0.5% (w/w); and at least one preservative enhancer compound selected from the group consisting of benzaldehyde, 4-methylbenzaldehyde, heliotropine, vanilline, 4-hydroxybenzaldehyde, 3-hydroxybenzaldehyde, 4-methoxybenzaldehyde and 3-methoxybenzaldehyde, 2,4-dihydroxybenzaldehyde, 3-hydroxy-4-methoxybenzaldehyde, 3,5-dihydroxybenzaldehyde, and 4-hydroxy-2-methoxybenzaldehyde, in a total concentration of 0.05 to 0.5% (w/w), in a cosmetically acceptable base. The composition optionally contains at least one compound selected from the group consisting of phenoxyethanol, 2-phenylethanol, and benzylalcohol, in a total concentration of 0.05 to 0.3% (w/w), but does not contain other classic bactericidal, fungicidal, sporicidal or preservative compounds. The invention is further directed to methods of forming such compositions and products and the use of preservatives and preservative enhancers in such compositions and products.