116results about How to "Large dispersion area" patented technology

The invention discloses an on-site calibration device of an airborne tritium monitoring instrument. The on-site calibration device of the airborne tritium monitoring instrument comprises an air processor, a bubbling unit, a transmission instrument, an aspirator pump and a recovery unit, all of which are sequentially connected, wherein the air processor is used for filtering and drying inlet air, the bubbling unit is used for bubbling tritiated water to form saturated tritium flow, the transmission instrument is used for being connected with a calibrated detection instrument and measuring the activity and concentration of the tritium flow generated on site, the aspirator pump is used for pumping the tritium flow into the recovery unit for recovery after the activity and concentration of the tritium flow generated on site are detected, and the recovery unit is used for cooling and recovering the recovered tritium flow. The ranges of the activity and concentration of the tritium flow generated by the on-site calibration device of the airborne tritium monitoring instrument in a bubbling mode depend on the total activity of the tritium flow for bubbling and can meet the calibration of most existing nuclear facilities using the measuring span of the tritium monitoring instrument. The uncertainty of the synthesis standard of the activity and concentration of the bubbled tritium flow is less than or equal to 10 percent, and the recovery rate of the tritiated water vapor by the recovery unit is more than 99 percent.

The invention discloses a modified perovskite-structure photoelectric conversion material and a preparation method thereof, and belongs to the field of photoelectric conversion materials, especially perovskite-structure photoelectric conversion materials. A modified photoelectric conversion material of a special structure and high photoelectric conversion efficiency is prepared by a technical scheme as follows: hydrotalcite is modified and oxidized, and the crystal structure of hydrotalcite is recovered in a solution; hydrotalcite exchanges ions in a solution with lead halide forming one precursor of a perovskite-structure crystal; and hydrotalcite reacts with methylamine halide forming the other precursor of the perovskite-structure crystal to form a perovskite-structure crystal of a hydrotalcite interlayer.

The invention provides a zinc gluconate pellet preparation, which is prepared from zinc gluconate and pharmaceutic adjuvant, and is characterized in that: the pharmaceutic adjuvant is an excipient and an adhesive, wherein in the pellet preparation, the weight percent of the zinc gluconate is 10 to 80 percent, the weight percent of the excipient is 12 to 89 percent and the weight percent of the adhesive is 1 to 8 percent. The pellet preparation can be prepared into a slow release preparation or an enteric-coated preparation. The zinc gluconate pellet preparation has high dissolution rate, and high bioavailability; and the method is simple, convenient, and easy to operate.

The invention provides a dangshen extract pellet preparation, which is prepared from a dangshen extract and pharmaceutical adjuvants, and is characterized in that: an excipient and a bonding agent are taken as the pharmaceutical adjuvants; and the pellet preparation comprises the following components in percentage by weight: 30-70 percent of a dangshen extract, 20-65 percent of an excipient and 1-10 percent of a bonding agent. The pellet preparation can be prepared into a slow-release or enteric preparation as required. As proved by a pharmacological experiment, the pellet disclosed by the invention has the effects of tonifying middle-jiao and qi, invigorating the spleen, promoting the production of body fluid, and the like.

The invention relates to the technical field of hydrogenation reactor equipment of fixed beds, and discloses a suction and overflow combined type gas and liquid separator. The suction and overflow combined type gas and liquid separator comprises a bubble cap, an overflow pipe, a center pipe and a crushing plate, wherein the bubble cap, the overflow pipe, the center pipe and the crushing plate are coaxially connected; the bottom surfaces of the overflow pipe and the center pipe are flush with the lower surface of a tower tray plate; the crushing plate is connected with a bolt at the bottom part of the center pipe through a fastener; the top part of the overflow pipe is provided with an overflow port; a second positioning part is arranged at the lower part of the overflow pipe; the bottom surface of the second positioning part is in contact with the upper surface of the tower tray plate; a cover plate is arranged at the top part of the center pipe; the pipe wall, exposing out of the bubble cap, of the upper part of the center pipe is provided with a plurality of gas inlets, the middle part of the pipe wall of the center pipe is provided with a plurality of gas outlets, and the highest location of the corresponding gas outlet is lower than the bottom part of the overflow port. The suction and overflow combined type gas and liquid separator has the advantage that the gas and liquid separator and the tower tray plate form the gas and liquid distribution panel, and the gas and liquid phase raw materials are uniformly distributed to the catalyst bed layer, and are in full contact with the catalyst, so that the radial temperature difference of the catalyst bed layer is decreased, the oil quality is improved, and the production cost is saved.

The invention provides a chondroitin sulfate pellet preparation, which is prepared from chondroitin sulfate and pharmaceutic adjuvant. The pellet preparation is characterized in that the pharmaceutic adjuvant is excipient and bonding agent, wherein the pellet preparation comprises the following components in percentage by weight: 10 to 90 percent of the chondroitin sulfate, 3 to 89 percent of the excipient, and 1 to 7 percent of the bonding agent. The pellet preparation can be prepared into a slow-release preparation or an enteric-coated preparation as requested. The chondroitin sulfate pellet preparation has high dissolution rate and high bioavailability, and the method is simple and convenient and is easy to operate.

The invention provides an astragalus polyose pellet preparation composed of astragalus polyose and medical supplementary materials. The astragalus polyose pellet preparation is characterized in that the medical supplementary materials are excipients and binders; and in the pellet preparation, the content of astragalus polyose 0.5-70 percent by weight, the content of excipients is 30-99.5 percent by weight, and the content of binders is 1-5 percent by weight. The pellet preparation has high dissolution rate and high bioavailability, and the preparation method is simple, convenient and easy for operation.

The invention relates to a catalyst for diphenylguanidine (DPG) serving as an accelerating agent in an oxygen oxidation synthesis production process and a preparation method thereof. The catalyst is one or more of metal salts, such as copper acetate, copper sulfate, copper nitrate, cobalt acetate, cobalt sulfate, cobalt linoleate, cobalt nitrate, cerium acetate, cerium sulfate, cerium nitrate, manganese acetate, manganese sulfate, manganese nitrate and the like; and a carrier of the catalyst is one or more of active carbon, SiO2, Al2O3, TiO2, a mesoporous material molecular sieve, a micropore material molecular sieve and the like. The prepared catalyst is used in reaction of synthesizing the DPG by oxygen oxidation; and the reaction is used for reflecting the performance of the catalyst. The use amount of the catalyst is 0.02 to 0.1 percent of the weight of reactants. The catalyst provided by the invention has the advantages of rational formula, small use amount and good catalysis effect, and contains active ingredients and the carrier; furthermore, the dispersion area of the active ingredients is enlarged, so the contact area between the active ingredients and the reactants is enlarged and the reaction speed is increased; meanwhile, the use amount of the catalyst is reduced; and yield of CBS is up to over 97 percent under the optimized reaction conditions.

The invention discloses a pellet formulation of pearl powder which is prepared by pearl powder and pharmaceutical excipients, wherein the pharmaceutical excipients are excipient and adhesive. In the pellet formulation, the weight percentage of the pearl powder is 5-80%, the weight percentage of the excipient is 20-95%, and the weight percentage of the adhesive is 1-5%. The inventive pellet formulation has high dissolution rate and bioavailability, easy and convenient preparation method, and easy operation.

The invention provides a levocarnitine micro-pill which is prepared from levocarnitine and pharmaceutic adjuvant, characterized in that the pharmaceutic adjuvant is an excipient and a bonding agent; the content of the levocarnitine in the levocarnitine micro-pill is 10 to 90 weight percent; the excipient 20-80 weight percent and the bonding agent 1-5 weight percent. The levocarnitine micro-pill of the invention has the advantages of high dissolution rate, high bioavailability, easy preparation method and convenient and easy operation.

The invention provides a compound hyaluronic acid pellet preparation. The compound hyaluronic acid pellet preparation is prepared from hyaluronic acid, VC and pharmaceutical accessories and is characterized in that the pharmaceutical accessories include an excipient and an adhesive; and the compound hyaluronic acid pellet preparation contains 5-20% by weight of hyaluronic acid, 1-5% by weight of VC, 70-85% by weight of the excipient and 1-5% by weight of the adhesive. The compound hyaluronic acid pellet preparation disclosed by the invention has high dissolution rate and bioavailability; and a preparation method is simple, convenient and easy to operate.

The invention provides a micro-pill preparation containing apple polyphenol. The micro-pill preparation is prepared from apple polyphenol and pharmaceutical adjuvants, and is characterized in that the pharmaceutical adjuvants comprise an excipient and a bonding agent. The micro-pill preparation comprises 5-20% of apple polyphenol, 70-85% of excipient and 1-5% of a bonding agent by weight percent. The micro-pill preparation is high in dissolution rate and bioavailability, and a preparation method of the micro-pill preparation is simple, convenient and easy to operate.