76results about How to "Less harmful" patented technology

The invention relates to a self heat-generating and gas-generating clean fracturing fluid comprising the raw materials of, by mass: 0.2-0.5% of a thickening agent, 2-4% of a structural enhancer, 2-15% of a heat generating agent A, 2-10% of a heat generating agent B, 2% of a structural enhancer solvent, 1-5% of a heat generating catalyst, 0.1-1% of a cleanup additive, 0.05-1.0% of a gel breaker, 0.05-0.15% of a broken plastic additive, and balance of water. The fracturing fluid has good temperature resistance, good shearing resistance, and sand-carrying property. The fluid can automatically generate heat and gas, such that the fracturing fluid is foamed in stratum. The fluid has low filtration loss. Gel breaking can be carried out with conventional persulfate and stratum oil, gas, and water dual gel breaking manner. Quick flow-back after pressure can be realized, and low-pressure oil and gas well self-spraying flow-back effect can be greatly improved. No residue and low harm is caused. The fracturing fluid can be used in fracturing modification of middle-shallow-stratum high-pour-point oil, crude oil with high viscosity, and low-pressure low-permeability oil and gas reservoirs.

An off-board refueling/refurbishing system for an integrated hermetically sealed fuel cell and solid hydrogen storage power plant, used to power transportation means operated and used by the public. A replaceable power plant package is handled in a refueling station where the sealed power plant package with depleted fuel and optional discharged electrical accumulator is removed from a vehicle and replaced with a refueled and recharged package. A separate recharging/refurbishing facility is provided where the waste product is removed from the depleted power plant package, the fuel cell and the solid hydrogen storage are tested and refurbished as needed.

The invention relates to an O-type foot-and-mouth disease virus antibody chemiluminescence detection kit. The kit includes an polystyrene board coated by antigen, a monoclonal antibody, a standard substance, a luminescence substrate solution A and a luminescence substrate solution B. The polystyrene board coated by antigen is an opaque polystyrene plate coated by an O-type foot-and-mouth disease virus RE2 recombinant protein; the monoclonal antibody is a horseradish peroxidase labeled O-type foot-and-mouth virus monoclonal antibody; the luminescence substrate solution A comprises a Lumino, hydroxycoumarin, gallic acid, a Tris-Hcl buffer and water; the standard substance is foot-and-mouth virus O-type antibody respectively diluted buy a calibration diluent, wherein the dilution is 0NU / mL, 2NU / mL, 5NU / mL, 10NU / mL, 30NU / mL and 60NU/ mL respectively. The kit of the invention can be used for detecting O-type foot-and-mouth disease virus antibody, has the advantages of high sensitivity and wide detection range, and realizes the quantitative detection of foot-and-mouth disease antibody.

A disposable device for exfoliating skin is disclosed which is simple and inexpensive to manufacture. The device can be secured to a shower floor or wall without tools or adhesives, and provides a stationary and waterproof exfoliating device for hands-free use while showering.

The present invention relates to detergent, and is especially one kind of detergent containing bromochloro hydantoin. The detergent of the present invention consists of bromochloro hydantoin in 0.1-50 wt% and other detergent in 50-99.9 wt%.

The invention discloses a clean foaming fracturing fluid and a preparation method thereof, and relates to the technical field of hydraulic fracturing. The clean foaming fracturing fluid comprises the following components by mass percent: 0.8-1.2% of a magnetic nanoparticle dispersion, 0.8-1.2% of a foaming agent, 3-5% of a surfactant and 92.6-95.4% of a first solvent. The preparation method comprises the following steps: adding citric acid into a second solvent to obtain a citric acid solution, dissolving ferrous chloride tetrahydrate and ferric chloride hexahydrate into the citric acid solution to obtain a first solution, adding ammonia water into the first solution to obtain a second solution, heating, stirring the second solution, separating to obtain a solid matter generated in the second solution, dissolving the solid matter into water, uniformly dispersing to obtain the magnetic nanoparticle dispersion, adding the magnetic nanoparticle dispersion, the foaming agent and the surfactant into the first solvent, and stirring to obtain the clean foaming fracturing fluid, wherein both the first solvent and the second solvent are water. The clean foaming fracturing fluid has relatively good magnetism, temperature resistance, shearing resistance and sand suspension.

The present invention provides a sheet glass laminate structure excellent in penetration resistance (bulletproof nature), crime prevention nature, heat shock resistance, translucency and airtightness. The sheet glass laminate structure (10) is produced by laminating at least three sheets of sheet glass (20) each having a sheet thickness of less than 1 mm with intermediate layers (30) interposed between them. When a central portion 20 mm in length including the middle point of a virtual line and opposite end portions respectively being 20 mm long from the opposite ends of the virtual line are set on the virtual line having a length equal to 50% of the maximum overall dimension of the translucent surface of the sheet glass (20) and extending in parallel with the direction of maximum overall dimension with the center of the translucent surface as its middle point, maximum variation DeltaHmax of the interval H between sheets of sheet glass opposing across the intermediate layer in connection with the central portion and the opposite end portions satisfies the following relation; 0[mu]m<DeltaHmax<20[mu]m.

The invention discloses a thermo-sensitive type chitosan hydrogel entrapped cell material as well as a preparation method and application and belongs to the technical field of medicine biologics. Thehydrogel entrapped cell material disclosed by the invention is prepared from the following raw materials in percentage by mass at 0-4 DEG C: 0.8-1.5% of low-viscosity chitosan, 0.4-0.5% of lactic acid, 1-3% of beta-sodium glycerophosphate and the balance of water. The hydrogel entrapped cell material disclosed by the invention is capable of entrapping cells to form gel at 37 DEG C. Compared with conventional chitosan/beta-sodium glycerophosphate thermo-sensitive hydrogel, the amount of the beta-sodium glycerophosphate can be effectively reduced, the toxicity of the high permeability of the hydrogel upon cells can be avoided, and in-vivo or in-vitro 3D cell culture in an environment of 37 DEG C after cell entrapping and injection can be achieved. The material has the advantages of being simple in reaction condition, short in response time, good in gel thermal stability, free of cytotoxicity, good in biocompatibility, and the like.

The invention discloses a mesenchymal stem cell cryopreservation solution and an activity research method thereof. The method comprises the following steps: separating hUC-MSCs, performing in-vitro amplification on the hUC-MSCs, collecting P3 generation cells, performing cooling cryopreservation, performing comparative statistics on the recovered hUC-MSCs and fresh cells, and detecting and identifying the hUC-MSCs. The method has the advantages that a large number of MSCs with high purity are obtained through a serum-free culture adherent method, programmed cooling is conducted through a programmed cooling instrument, damage to cells is reduced, good cell viability is kept, and when the ratio of DMSO to FBS to DMEM is 1: 8.5: 0.5, the survival rate after cryopreservation is optimal, and the morphology and growth rate after recovery are basically consistent with those of normal fresh cell culture.

A multiple layer coating for application upon surfaces of an implantable medical device, a first layer of such coating includes an anti-thrombogenic factor and a second layer of such coating includes a hyperplasia inhibiting factor that is releasably contained therein. The hyperplasia inhibiting factor is controllably released from the multiple layer coating over a predetermined period of time upon implantation of the medical device in vivo.

The invention relates to a competitive hog cholera virus antibody chemiluminescence quantitative detection kit, which comprises a coating antigen coated plate, an enzyme-labeled antibody, a calibrator, a washing concentrate, a luminescent substrate A and a luminescent substrate B, wherein a purified hog cholera virus E2 protein is taken as a coating antigen of the antigen coated plate; the enzyme-labeled antibody is a hog cholera virus monoclonal antibody labeled by horseradish peroxidase; hyperimmune serum immune to a live vaccine is diluted to concentrations of 0NU/mL, 2NU/mL, 5NU/mL, 10NU/mL, 30NU/mL and 60NU/mL by a calibrator diluent respectively; the luminescent substrate A contains luminol, hydroxycoumarin, gallic acid and a Tris-Hcl buffer solution. The kit has the advantages of short detection time, capability of greatly enhancing a detection signal, high sensitivity and the like.

An extrasonic scaler includes a triangulate straight scaler, a leftward bent arc-shaped triangulate scaler, a rightward bent arc-shaped triangulate scaler, a leftward bent distal-hoe semi-triangulate scaler, a rightward bent distal-hoe semi-triangulate scaler, a leftward bent mesial-hoe semi-triangulate scaler, and a rightward bent mesial-hoe semi-triangulate scaler. Thus, the extrasonic scaler is designed according to the tooth pattern of the human body so that the extrasonic scaler can reach the deeper surface of the tooth root from various different directions to remedy the oral and periodontal diseases, thereby enhancing the working efficiency.

An object of the present invention is to provide a method for producing an alkyl ester of a fatty acid from a fat or oil, of which main component is a triglyceride, and an alkyl alcohol under mild conditions in a high reaction efficiency, and the alkyl ester of a fatty acid can be effectively utilized as a diesel fuel oil, an industrial raw material or the like, the method further being capable of utilizing on an industrial scale, in which post-treatment steps for removing a catalyst component can be simplified or omitted. For this purpose, the method for producing an alkyl ester of a fatty acid of this invention includes the step of carrying out a transesterification reaction between a fat or oil and an alcohol in the presence of a base catalyst containing calcium oxide, characterized in that the method includes the step of contacting the base catalyst with the alcohol, to carry out an activation treatment thereof in advance of the reaction.

The present invention relates to a method of confining pollution generated in the top volume and/or in the bottom volume of an enclosure filled with a fluid, i.e. either a gas, which is in general air, or a liquid, which is in general water, the method confining the pollution by thermal stratification. In said method the mean temperature of said top volume is maintained higher than the mean temperature of said bottom volume by an amount that is sufficient to ensure that said two volumes are separated by a turbulent intermediate zone of narrow width, referred to as the "mixing zone", within which a steep temperature gradient is maintained; said intermediate zone constituting a virtual confinement barrier in a horizontal plane. The present invention also relates to apparatus associated with the method.

The present invention relates to a lighting device (12) comprising at least one light source (12a, 12b) adapted to emit white light and ultraviolet light, a collimator (18) adapted to collimate the white light, and a light exit window (16) through which the collimated white light and the ultraviolet light may pass into the ambient, wherein the lighting device is adapted to emit the collimated white light while spreading the ultraviolet light.

The invention relates to an electric-motor kitchen appliance (1), in particular an electric-motor handheld device, preferably a hand mixer (2), which comprises a switch (67). The invention also relates to a finger-actuated electric control (68) for the switch (67), and to a method for switching on/off a kitchen appliance (1). The switch (67) is unlocked when the safety switch (69) is actuated by the finger of a user. The safety switch (69) is electronically switched. The invention is characterised in that possibility of unintentionally operating the electric-motor of the kitchen appliance (1)is reduced due to the manual operation of the two separate switches. As a result, the safety of the electric-motor kitchen appliance (1) in the household is significantly increased.

The present disclosure relates to a dimethyl sulfoxide composition suitable for cleaning polymer residue found on the devices used for processing plastic materials, in particular polyurethane.

The strain of Trichoderma asperellum T34(2) CECT No. 20417 is useful for preparing substrates for biological control of vascular fusariose and death of plants caused by Rhizoctonia solani. The substrates can be peats, composts (hardwood compost, pine bark compost, cork compost, sludge compost from sewage treatment plants, garden residues, etc.) or formulations based on CPV-type compost (compost+peat+vermiculite). The fact that the substrates suppress both Fusarium oxysporum f. sp. lycopersici and Rhizoctonia solani provides an advantage in comparison with other substrates known in prior art. Another advantage is that the use of methyl bromide, a highly harmful product for the environment, in the control of vascular fusariose is avoided.