42results about How to "Reduce bubbling" patented technology

A device for minimizing the formation of bubbles or foam in cell culture is disclosed. The device has a manifold which directs the inflow of cells and cell culture media into a cell culture vessel so as to allow for displaced air or gas to vent from the cell culture vessel without mixing with the incoming cell culture media, thereby preventing the mixing of air and cell culture media and minimizing the formation of bubbles or foam inside the cell culture vessel.

The invention relates to a process for bonding by molecular adhesion of two substrates to one another during which the surfaces of the substrates are placed in close contact and bonding occurs by propagation of a bonding front between the substrates. The invention includes, prior to bonding, a step of modifying the surface state of one or both of the surfaces of the substrates so as to regulate the propagation speed of the bonding front. The surface can be modified by locally or uniformly heating or roughening the surface(s) of the substrate(s).

Techniques are disclosed for executing conditional computer instructions in an efficient manner that reduces bubbles and idle states. In one embodiment, dual-function instruction execution is disclosed where the dual-function instruction has two possible functions (or operations), the choice of which is controlled by a predicate value with a true or false value. Among other things, the disclosed techniques provide dynamic control for choosing which operation to execute leading to more efficiently executed code.

A large core polymeric optical fiber having improved light transmitting characteristics includes a cladding filled with a light transmitting core. The core is formed during a polymerization reaction within the cladding in which the pressure internal to the cladding is greater than the pressure external to the cladding to form a pressure differential supported by the cladding.

A method of manufacturing a plastic lens by mixing plural polymerizable components, and immediately after mixing, casting a mixture into a casting mold and conducting polymerization to obtain a molded article. A method of manufacturing a plastic lens by casting a plastic lens starting material liquid flowing out of a casting jig opening into a casting mold and curing the above starting material liquid to form a molded article. A gasket for molding plastic lens comprised of a cylindrical member comprising openings for fitting by insertion two molds. A casting mold for molding plastic lens, wherein the above molds are detachably held in the above openings of the above gasket so that molding surfaces of the two molds are positioned opposite at a prescribed interval to form a cavity corresponding to a lens shape within the above cylindrical member. A casting jig for plastic lens starting material liquid equipped with a nozzle for casting a plastic lens starting material liquid into the casting mold. A method of manufacturing a plastic lens comprising casting of a plastic lens starting material liquid into a casting mold held by a holding member and curing the above starting material liquid to form a molded article. A holding member for plastic lens casting mold for holding a casting mold for molding a plastic lens.

Devices are disclosed that include a piezoelectric vibrating piece; a glass base and lid form a package enclosing the piezoelectric vibrating piece. The piece has first and second electrodes. The base has first and second opposing surfaces. The base mounts the piezoelectric vibrating piece, and the lid seals the piezoelectric vibrating piece in the package. The base includes first and second metal wires, extending therethrough, whose ends are denuded to the first and second surfaces and connected to the first and second electrodes, respectively. In disclosed methods for making the packaged devices, such as piezoelectric oscillators, multiple packaged devices are made simultaneously by stacking and simultaneously bonding respective wafers on which glass bases, piezoelectric vibrating pieces, and lids have been formed.

The invention provides an aqueous epoxy zinc-enriched antirust priming paint for railway steel bridges and a preparation method thereof, and relates to the technical field of paints. The priming paintcomprises a component (a) and a component (b) according to a mass ratio of 1:4. The component (a) is prepared from following raw materials: aqueous epoxy resin emulsion, graphene coated glass fibers,nano antimony doped tin dioxide, nano titanium dioxide, an epoxy silane coupling agent, n-butyl alcohol, propylene glycol mono-methyl ether, an antifoaming agent (A), and deionized water; and the component (b) is prepared from following raw materials: a cardanol modified polyamide curing agent, zinc powder, a filling material, a thixotropic agent, an antifoaming agent (B), a dispersant, a flush-rust resistant agent, and a mixed solvent. By adding graphene coated glass fibers and nano antimony doped tin dioxide into the paint, the prepared epoxy zinc-enriched antirust priming paint has an excellent corrosion resistant performance, a strong adhesion force, and good weatherability even if the zinc powder content is low.

The invention relates to the field of microalgae breeding, and particularly relates to an immobilized breeding method of microalgae. A bubbling phenomenon in the process of immobilized breeding can be reduced, so that the immobilized breeding yield of microalgae is improved. The defect that in the prior art, the gas dissolved concentration or gas release of microalgae culture liquid in the process of immobilized breeding is large, so that a bubbling phenomenon easily occurs between a baseplate and a liquid conveying layer, between the liquid conveying layer and a carrier and between the carrier and a microalgae cell layer, thereby causing that the supply of the microalgae culture liquid is obstructed and the immobilized breeding yield of microalgae is low is overcome. An embodiment of the invention provides an immobilized breeding method of microalgae, which is used for carrying out immobilized breeding on microalgae by using pretreated microalgae culture liquid, wherein the gas dissolved quantity or gas release of the pretreated microalgae culture liquid in comparison with microalgae culture liquid before being pretreated is reduced.

The invention discloses a novel helium ion sputtering-resistant vanadium alloy. The problem of low helium ion sputtering resistance of the prior art is solved. The alloy comprises the following components in percentage by weight: 3.0 to 6.5 percent of Cr, 3.0 to 6.5 percent of Ti, 0.1 to 2.0 percent of Y and the balance of V. In addition, the invention further provides a method for preparing the alloy. According to the vanadium alloy, on the basis of a V-Cr-Ti ternary alloy system, Cr and Ti are employed as main alloy elements, the rare earth element Y is added to reduce the content of solid solution oxygen in the vanadium alloy and reduce the dimensions of ingot crystals by virtue of a simple alloying means, and a plastic deformation machining means is combined to disperse and distribute yttrium oxide with stable high-temperature performance on a substrate and remarkably reduce and uniformize the dimensions of the annealed alloy crystals, thereby improving the toughness of the alloy and greatly enhancing the helium ion sputtering resistance of the alloy.

The invention discloses a preparation method of impact-resistant glass with a coating. The coating comprises the following components in parts by weight: 20-30 parts of condensed silicon resin, 2-10 parts of vinyl silicon resin, 1-5 parts of a curing agent, 1-5 parts of an adhesion promoter, 0.1-1 part of a leveling agent and 55-65 parts of a solvent. A step-by-step spraying mode is adopted, an anti-impact coating is sprayed on a preheated glass base material, after ultraviolet curing and thermal curing, the coating is cooled to room temperature step by step, according to the impact-resistantglass with the coating prepared by the method, the impact resistance can be improved by 85% or more, and the coating is high in hardness, free of yellowing, strong in adhesiveness and scrub resistance, not easy to fall off, and good in weather resistance and durability.

The invention provides a preparation process of H08A steel. The preparation process comprises the following specific steps of first, smelting in a converter, wherein magnesium alloy is added in the tapping process to carry out pre-deoxidation and argon blowing, and the free oxygen content of molten steel is controlled to range from 80 ppm to 100 ppm; second, LF refining, wherein calcium is added in the process to remove oxygen again, and the free oxygen content is controlled to range from 10 ppm to 20 ppm after LF refining heating of the molten steel is finished; and third, continuous casting;wherein according to the feeding manner of adding the magnesium alloy in the first step, powdery magnesium alloy is blown into the bottom of a steel ladle by using carrier gas. According to the preparation process of the H08A steel, the section of a produced casting blank (8 hours of continuous casting) sample produced is free of any obvious bubbles, the central porosity grade is less than or equal to 0.5 grade, the central segregation grade is less than or equal to 0.5 grade, other obvious defects do not exist, and the percent of pass is 99%; and meanwhile, in the cross section of a steel body with the area of 100 * 100 millimeters, the number of inclusions is no larger than 30, and the maximum diameter of the inclusions is no larger than 20 micrometers.

The invention provides a special yellowing-resistant high-performance water-based two-component matte varnish for dyed veneers. By selecting an emulsion, a curing agent, a light stabilizer, a cosolvent and other auxiliary agents, and by optimizing the ratio of the raw materials, the varnish is suitable for coating of dyed veneer substrate with characteristics of easy discoloration in the presenceof light, provides the protection effect for the substrate, and provides the dyed veneer with characteristics of strong light discoloration resistance; meanwhile, a paint film has strong chemical resistance, outstanding moisture resistance, outstanding water resistance, no bubbling, no delaminating, high adhesion and long activation period.

The invention belongs to the field of coating preparation, and particularly relates to a waterproof coating and a production method thereof.The waterproof coating is prepared from 40-60 parts of epoxy modified polyether polyol, 20-30 parts of polyisocyanate monomers, 20-30 parts of plasticizer, 1-5 parts of latent curing agent, 0.3-3 parts of catalyst, 0.1-2 parts of defoaming agent, 1-5 parts of anti-sagging agent, 10-20 parts of graphene oxide and 5-10 parts of silane coupling agent. According to the scheme, the graphene oxide is added, and the graphene oxide is tiled in a coating film to form a multi-layer compact structure, so that the waterproof performance of the coating is improved, and meanwhile, the extensibility of a waterproof film formed by the coating is improved; hydroxyl groups on the surface of the graphene oxide respectively react with the silane coupling agent, so that the extensibility of a waterproof film formed by the coating is improved.

The invention discloses a mold vacuum suction device, which comprises a movable mold plate provided with a movable mold core; a fixed mold plate provided with a fixed mold core, and the movable mold core and the fixed mold core are matched to form a cavity; and vacuum suction pieces comprising a first vacuum suction piece embedded in the fixed mold plate and a second vacuum suction piece embeddedin the movable mold plate. When the movable mold plate and the fixed mold plate are matched, the first vacuum suction piece and the second vacuum suction piece are matched to form an air flow channel,and the air flow channel is communicated with the cavity to discharge air in the cavity to form a vacuum state. The mold vacuum suction device disclosed by the invention is capable of sucking a largeamount of air out of the mold cavity to form a vacuum state by arranging the vacuum suction pieces, so that the bubbling phenomenon is reduced in the product manufacturing process, and the service life of products is prolonged.

The invention discloses a composite paper strength enhancer and a preparation method thereof. The composite paper strength enhancer is specifically obtained by compounding a starch-polyethyleneimine graft polymer and polyamide epichlorohydrin resin. The paper strength enhancer can enhance the internal bonding strength of paper, ensure the quality of the paper, reduce the occurrence of bubbling and layering phenomena, is small in dosage, does not influence the dehydration performance of the paper, reduces the cost and improves the production efficiency.

The invention relates to a high-density casting film forming device, comprising a frame, a casting roll, a feeding component and a setting component. The feeding component is fixedly arranged on the frame, and solutions with different viscosities pass through the feeding component , forming mutually independent liquid curtain groups in sequence below it, the shaping component is located below the feeding component, which includes a moving part and a shaping roller rotatably installed on the moving part to guide the liquid curtain group, the The setting roller is in intermittent contact with the liquid curtain group. During the contact between the two, the setting roller conducts guiding and forming treatment on the liquid curtain group; The cast film, which is the initial shape of the film structure, is formed by the casting roll, which solves the problems in the prior art that the surface of the casting roll is bonded, the surface of the film is uneven, and the precision of the produced film is not high during the peeling process of the cast film. question.

The invention belongs to the field of chemical technology and metal material surface protection treatment methods, and relates to a pretreatment method of chemical nickel-phosphorus plating of aluminum and aluminum alloy and application of the pretreatment method in the field of metal material surface protection treatment. The method comprises the steps of: organic solvent oil removal, stress relief annealing treatment, chemical oil removal, electrolytic passivation treatment and activating treatment. A production test proves that an aluminum and aluminum alloy surface passivation film layer prepared by the pretreatment method is very uniform, the binding force of a plating layer is obviously increased, and the plating layer has certain porosity, so that a good metal surface condition is provided for a later chemical nickel-phosphorus plating process, and the occurrence rate of product quality problems such as nickel-phosphorus layer falling and bubbling can be greatly reduced; and the pretreatment method is simple in technological process, stable in product quality and low in production cost, and obviously reduces pollution compared with that of a traditional zinc immersion process.