228 results about "Millipore Filters" patented technology

The present invention provides an enhanced millipore filtering film and a method, device for preparing, the enhanced millipore filtering film includes a non-woven fabric as substrate, employing casting wipe way, casting film liquid is applied on the front and the back surfaces of the non-woven fabric, two layer film is formed by gelatin, characterized in that the thickness of the non-woven fabric is 30-120 micron, planar density of the non-woven fabric is 30-100g/m2, thickness of each film layer is 5-10 micron; casting film liquid in two film layer is composed by mixing a polymer resin, an organic solvent and an additive; parts by weight of the polymer resin in the casting film liquid, parts by weight of the organic solvent : parts by weight of the additive is 5-40:40-90: 0.5-50. The enhanced millipore filtering film of the invention is applied in the sampling monitor or filter of alpha radioaerosol under the high radon environment.

The invention relates to the technical field of medicament delivery by a carrier, in particular to a lung targeting medicament carried proliposome used for injection and an application method thereof. Solid dispersion technology is adopted to obtain solution A by dissolving active medicament, phospholipid liposome, cholesterol liposome, surface active agent and acid type carrier in absolute ethyl alcohol or the mixed solvent of absolute ethyl alcohol and absolute ether; active carbon which is used for injection and has the volume being 0.1-1% of the volume of the solution A is added into the solution A; stirring, standing and filtering of the solution by a millipore filter are carried; therefore, aseptic solution B free of pyrogen is obtained; aseptic additives are added into the solution B under an aseptic condition; organic solvent is removed; and solid granular medicament carried proliposome or powdered medicament carried proliposome are obtained. The invention has the advantages that the preparation process is simple; the cost is low; the quality is controllable; the stability is good; and the invention is suitable for industrial production. The medicament carried proliposome prepared by effervescency dispersion technology has small and uniform particle diameter, the electric charge ranges from -10mv to -30mv, the proliposome can deliver over 90% medicament to a lung, and remarkable lung targeting effect is achieved, and thus being the best preparation delivering medicament by a carrier for treating lung diseases.

The invention discloses a method for preparing a reduced graphene oxide heat conductive film. The method comprises the following steps: adding graphite oxide into the deionized water to perform ultrasonic treatment, centrifuging the obtained suspension solution for 5-20 min at the speed of 2000-3000 rpm, getting a supernate, drying and grinding to obtain the graphene oxide; and adding the obtained graphene oxide into a solvent to perform ultrasonic treatment to obtain a graphene oxide dispersed solution with the concentration of 1-5 mg/ml, performing vacuum filtration by a millipore filter, drying the obtained filter cake with the filter membrane, stripping the filter cake from the filter membrane, exerting the pressure of 0-10 MPa to the obtained graphene oxide, under the atmosphere of nitrogen, argon or helium, and processing for 2-8h at the temperature of 600-1000 DEG C to obtain the reduced graphene oxide heat conductive film with high heat conductivity, high reduction degree, high graphene lamellar surface inner orientation degree, smooth surface, good flexibility, wide curl degree without crack and small interlamellar spacing. The preparation method is simple and the reduced graphene oxide heat conductive film is easy for realization of industrial production.

The invention relates to a quantitative detection device based on fibrous-membrane gathering and separation and a detection method thereof. The quantitative detection device comprises a separation testing cup, a reaction cup, an analysis buffer solution and a cleaning solution; wherein the separation testing cup comprises a receiving tank, a water absorption cup and millipore filters between them. A capture agent and a labeling agent are solidified on the bottom of the reaction cup and the capture agent is fixed on the surface of latex beads. The detection method comprises: conjugation reaction, separation, cleaning and detection. In the invention, not only the characteristics of convenient operation and rapid detection of immune infiltration (IF) and immunochromatography (IC) are maintained, but also precision and sensitivity of the detection are obviously better than that of IF and IC. Therefore, quantitative immunodetection and nucleic acid hybridization analysis can be implemented effectively. The invention can be used for the quantitative detection of substances such as protein, nucleic acid, small molecule and microbe.

The invention discloses a built-in microporous filter membrane connection microbe culture device belonging to the microbe culture technology, a culture method thereof, and a microbe culture, isolation and purification and observation technology in various environments by utilizing a culture medium. The culture device is provided with clapboard in an internal space composed of a dish body and a dish body lid, and the clapboard is fixed with a microporous filter membrane which divides the internal space of the culture device into two spaces. The two spaces are respectively used to bear the microbial culture group and provide a simulation external environment medium of a microchemistry matter with a microbial growth necessary factor. The dissolved matters at the two sides of the filter membrane are capable of freely exchange and the cell cannot permeate. Therefore, the culture device is capable of culturing more miceobes that the regular method can not culture. The invention applies the culture device to culture the microbes, which can effectively improve the culturablity of the environmental microbes, facilitate experiment system construction, make the operation easy and time-saving and has stronger industrialized application potention.

A filtering and washing process for preparing the metallic or non-metal fine particles includes filtering, washing, blow-drying of filtered cake, discharging and cleaning filter. Said filtering step features use of the precise millipore filter with at least two filter regions for respective filtering. Said washing step includes reversely blowing the washing liquid to drop the filtered cake onto filter plate, instantaneously reversely blowing compressed air several times, and stirring the mixture of filtered cake and washing liquid.

The invention discloses a method for determining size distribution of solid particles in catalytic cracking oil slurry, and the method comprises the following steps: (1) carrying out a pretreatment for filter membranes of different apertures, and weighing for standby application; (2) carrying out a pretreatment for catalytic cracking oil slurry; (3) carrying out dilution for the oil slurry treated in the step (2), and carrying out ultrasonic concussion for the diluted oil slurry for standby; (4) filtering the oil slurry diluted in the step (3) with filter membranes of different apertures successively according to an application sequence from the ones with large apertures to the ones with small apertures; 5) carrying out a constant weight treatment of the filter membranes obtained after pumping filtration, and weighing after the constant weight treatment; (6) obtaining the mass of solid particles on each filter membrane according to mass differences of millipore filter membranes of different apertures before and after pumping filtration, acquiring the total mass of solid particles in the oil slurry by adding the additive operation, and calculating mass fractions of solid particles on millipore filter membranes of different apertures in total solid particles. The invention effectively solves the problem of incomplete gathering of solid particles in oil slurry, and can comprehensively reflect particle size distribution of solid particles in oil slurry.

A freeze-dried injection of ropivacaine is prepared from the ropivacaine methanesulfonate (or hydrochloride), diluent chosen from mannitol, lactose, sodium chloride, dextran, glucose, glycine, hydrolytic gelatin and povidone, isotonic regulator and pH regulator through dissolving them in the water for injection, stirring, cooling, adding the water for injection, adding activated carbon, adsorption, filtering for removing carbon, fitlering by millipore filter and freeze drying.

An aseptic powder of N(2)-L-alanyl-L-glutamine is prepared through adding N(2)-L-alanyl-L-glutamine to distilled water in aseptic condition, stirring, heating for dissolving, adding medical activated carbon, stirring, filtering for removing activated carbon, millipore filtering for removing bacteria, adding aseptic alcohol to educe out crystals, filtering, washing with cold alcohol, and vacuum drying. It has high optical and thermal stability.

The invention discloses a method for preparing a cation polystyrene template based on porous materials, which comprises the following steps: by utilizing soap-free emulsion polymerization, after styrene monomer polymerization is carried out for 1.5 hours, starting to inject the mixture of cation DMC and deionized water (with volume ration being 2:1) into a reaction system by a micro sample injector. The first three times of injections are respectively carried out with the interval of half an hour, and the later two times of injections are carries out with the interval of one hour. Subsequently, a plurality of times of DMC mixtures can be continuously injected every three minutes, 50 Mul of the DMC mixture is injected each time, and the highest content of the injected DMC can reach up to 30-50% (compared with the mass of St). Aqueous millipore filter membrane (0.2 mu m) is then used for centrifuging and separating the prepared cation template, and finally a cation nano polystyrene template with monodispersity is obtained. The template can be applied to the synthesis of the porous materials, is extremely easy to be dissolved in alcohol and little dichloromethane solvent, and is beneficial to removing the template of the porous materials.

Th invention discloses a nano particle intercalation graphene oxide thin film and a preparation method and application. The thin film is formed by spraying graphene oxide onto a millipore filter in anelectrostatic spraying mode to be stacked, nano particles are inserted between graphene oxide sheets, the particle size of the nano particles ranges from 10 nm to 40 nm, and the nano particles are hydrophilic nano particles. The preparation method comprises the steps that graphene oxide and the namo particles are added into a solvent to be dispersed uniformly, a mixed solution is obtained, and the nano particle intercalation graphene oxide thin film can be obtained by spraying the mixed solution to the millipore filter in the electrostatic spraying mode. The nano particle intercalation graphene oxide thin film can effectively increase the space between the graphene oxide sheets, the pure water flux is increased, and meanwhile the high retention rate is kept for organic dyestuff.

The invention discloses a tea saponine nanocapsule, a preparation method and application thereof, i.e. tea saponin is dissolved with water and is extracted with n-butyl alcohol, 1-5% of sodium hydroxide is added, the mixture is refluxed for 2-5h at 80-100 DEG C, and is decompressed to recycle the n-butyl alcohol, a solvent is used to dissolve the sediment, then crystallization and drying are carried out, so the tea saponine is obtained; and a capsule material is produced into 1-10% of capsule material solution with the solvent, 0.5-5% of emulsifier and 1-10% of tea saponine are added to be stirred and emulsified for 0.5-2h, the emulsion is slowly added into aqueous solution with the pH of 2-6 and 0.1-1% of emulsifier to stir for 1-3h, the mixture passes a millipore filter and is stood for layering, the sediment is dried, i.e. the tea saponine nanocapsule is obtained. The nanocapsule can be produced into sterilizing sterilized, anti-inflammatory and immunity supplement preparation. The nanocapsule improves the stability of the tea saponine, and obviously improves the sterilizing, anti-inflammatory and immunity supplement effects.

The invention discloses fluorescent disperse dye ink for inkjet printing and a preparation method of the fluorescent disperse dye ink. The ink consists of a disperse dye, a fluorescent agent, a versatile dispersant, an organic solvent, a wetting agent and a surfactant. The preparation method comprises the following steps: stirring the disperse dye, the fluorescent agent, sodium lignin sulfonate, diethylene glycol and deionized water at a low speed by using a stirrer, and grinding in a grinding dispersion mill, thus obtaining disperse dye mill base with a solid content of 15 percent; stirring the dye mill base and the deionized water in the stirrer, adding an organic solvent formed by mixing isopropanol, thiodiglycol and biglycol ether and the wetting agent and the surfactant, and adding a preservative after the PH value is regulated to be 8-9; and filtering the mixed ink by using a millipore filter membrane, and further filtering the filtrate through the millipore filter membrane. The fluorescent disperse dye ink can be subjected to jet printing onto heat transfer paper from a piezoelectric inkjet printing machine, or is directly subjected to jet printing onto a chemical and blended fabric, and is suitable for large-scale industrial production.

The invention relates to a lansoprazole frozen powder injection agent and a preparation method thereof. The lansoprazole frozen powder injection agent prepared by the method can be taken as a medicine for treating gastric ulcer, duodenal ulcer, erosive gastroesophageal reflux disease, helicobacter pylori and Zollinger-Ellison Syndrome. The lansoprazole frozen powder injection agent prepared through taking a lansoprazole as an active ingredient, adopting crystallized filtration, freezing and drying. The preparation process comprises the following steps of: adding water for injection and alkali to the lansoprazole, stirring to dissolve and mix uniformly; performing the crystallized filtration; after measuring the content, adjusting pH value of filtrate; using the water for injection for fixing volume and a millipore filter with 0.22 mu m for filtration; filling, partially arranging corks, arranging in trays, freezing out, pressing the corks, taking out from boxes, rolling openings, checking quality and packaging. The prepared lansoprazole frozen powder injection agent has excellent re-dissolving performance, is more stable when used together with transfusion in clinical use, can not separate out, and has better inspection result for visible foreign matters and insoluble particles.

The invention provides a device for evaluating the dissolving/absorbing process of medical solid preparation, essentially consisting of a medicine dissolving room, a pH value adjusting room and a spreading pool, wherein the bottom of the medicine dissolving room is provided with a magnetic stir bar; the spreading pool consists of a feeding room, a receiving room and Caco-2 monolayer cell membraneor animal (such as rat) isolated intestine embedded between the feeding room and the receiving room; the medicine dissolving room, pH value adjusting room, the feeding room and the receiving room areconnected with each other by silicone tubes with inner diameter of 1.0mm-2.0mm; and the medicine dissolving room is provided with a medicine carrying device; a gap is remained between the medicine carrying device and the magnetic stir bar at the bottom of the medicine dissolving room; the top of the pH value adjusting room is provided with a stainless steel sieve mesh; and the silicone tube between the pH value adjusting room and the feeding room is internally additively provided with a Millipore filter. The device is applicable to wider solid preparation such as troche, soft capsule, hard capsule, and the like, solves the blocking problem caused by medical auxiliary materials, and truly simulate the affect of the pH change of gastrointestinal tract to the releasing rule of the medical solid preparation under the condition of human physiology.

A test and evaluation method of density of fibers sucked from cigarettes or filter sticks is characterized in that a millipore filter is covered on the surface of a filtering piece of a suction device, corresponding parameter is adopted on the suction device to conduct suction on the cigarettes or the filter sticks, a microscope is utilized to observe the number of silk fibers on the catching face of the filter after suction is finished, and ratio of the number of the fibers on the filter and the suction total capacity is utilized to calculate the density of the fibers sucked from the cigarettes or the filter sticks. The test and evaluation method has the advantages of being capable of intuitively calculating the density of the fibers sucked from the certain amount of cigarettes or filter sticks, being capable of obtaining size information of the fibers while quantitatively calculating the density of the fibers and being simple, convenient to operate and easy to popularize.

The invention discloses a leech aquarium. The leech aquarium comprises a closed aquarium body, the interior of the aquarium body is divided into a water pump chamber and a cultivation chamber left and right, the top of the water pump chamber and the top of the cultivation chamber are respectively provided with a cabin door, a water pump is arranged in the water pump chamber, a water outlet of the water pump is communicated with the cultivation chamber through a water outlet pipe, and an outlet of the water outlet pipe is provided with a Millipore filter screen which can prevent leeches from entering the water pump. A three-dimensional leech cultivation method based on the leech aquarium includes the steps that leech fries are thrown into the cultivation chamber of the leech aquarium, the stocking density is 1.5-2 times that of conventional cultivation, namely the density is 0.02-2.3 kg/m<2>, the fries are thrown in two batches, namely, the second batch is thrown when about one third of the leech fries are adsorbed on aquatic plants, feeding is performed regularly, the leech fries are fed according to a conventional method, the aquarium is placed indoors, the temperature is suitable for the leech fries to grow, particularly in winter, the leech fries in the cultivation chamber are located in a closed space and can not escape, and therefore economic benefits are improved.

This invention relates to a preparation method of freeze-dried injection of nedaplatin.nedaplatin freeze-dried injection prepared with the inventive method can be used as therapeutic drug of cancer. The invention improves the stability of nedaplatin during lyophilization and shortens the period of lyophilization through adding ethanol during preparation process. the preparation method comprises adding water for injection 80% of nedaplatin into nedaplatin, stirring for dissolving, adding dextran, stirring for dissolving, determing the content of intermediate, adding ethanol 1-10% of the cumulative volume of the solution, adding water for injection to full dose, filtrating with 0.22 mu m millipore filter under aseptic condition, encapsulating in sirin bottle, plugging, freeze drying, rolling the opening, testing, and packaging. The optimum amount of ethanol is 1-5% of cumulative volume of the solution.

The invention relates to a targeted hydrophobic antitumor drug nano preparation. The nano preparation comprises a hydrophobic antitumor drug and a carrier in a mass ratio being 1: (4-32.5), wherein the carrier comprises 37.5wt%-95.3wt% of albumin and 4.7wt%-62.5wt% of a hyaluronic acid-albumin conjugate, and the hyaluronic acid-albumin conjugate is prepared from albumin and hyaluronic acid in a mole ratio being 1: (1-20). The preparation method of the nano preparation comprises steps as follows: preparing the hyaluronic acid-albumin conjugate; preparing a carrier solution; preparing a drug solution; preparing the nano preparation. The nano preparation has more uniform particle size distribution and good dispersability, is stable and avoids agglomeration, the particle size is nearly unchanged after freeze-drying and redissolving, and the yield is high after the nano preparation is filtered by a millipore filter (0.22 mu m), and the pharmacological function is good.

The invention discloses a preparing method for ambroxol hydrochloride injection. The preparing method for the ambroxol hydrochloride injection includes the following steps that each 2ml of the injection comprises, by weight, 15 mg of ambroxol hydrochloride, 4.0 mg of disodium hydrogen phosphate, 1.16 mg of citric acid and 14 mg-16 mg of sodium chloride; water for injection is cooled to be below 30 DEG C; the disodium hydrogen phosphate and the citric acid are added into the water for injection to be dissolved; a prescribed dosage of ambroxol hydrochloride raw medicine is added to be dissolved; the sodium chloride is added to adjust solution to be isotonic; the solution is filtered through a 0.22-micrometer millipore filter; and the solution is filled and sterilized after high purity nitrogen gas is let in. The preparing method for the ambroxol hydrochloride injection is simple in process and stable in product quality.