90 results about "Water diffusion" patented technology

A novel dosage form. The dosage form is presented in particulate form and before oral ingestion the particulate material is subjected to an aqueous medium, whereby it is converted to a semi-solid form by swelling or gelling of one or more of the components, especially of a gellan gum, of the particulate matter. The invention also relates to a vehicle for oral administration of one or more active substances, the vehicle comprising a gellan gum arranged in a configuration allowing optimal water diffusion so that upon addition of a predetermined amount of an aqueous medium, without the necessity of applying shear forces or other mixing forces, within a time period of 5 minutes or less swells and/or gels and the texture of the swelled vehicle being similar to that of a soft pudding and having a viscosity of at least about 10,000 cps as measured by a Brookfield Viscometer with a #4 LV spindle at 6 rpm and at 20-25° C. In one embodiment of the invention, the particulate matter can be moulded into a desired shape or pressed onto a dispensing unit such as a spoon.

Prior approaches have delivered O₂ to a subject by inhalation, but the relationship between local signal changes and metabolism has been complicated by H₂¹⁷O created in non-cerebral tissues. During a brief pulse of ¹⁷O₂ inhalation, this arterial input function for H₂¹⁷O is negligible due to convective transport delays. Additional delays in the arterial input function due to restricted diffusion of water makes pulsed inhalation of ¹⁷O₂ even more effective. Accordingly, ventilator system are provided to deliver ¹⁷O₂ as a brief pulse to a subject. Subsequent MR imaging demonstrates delayed appearance of H₂¹⁷O in the cerebral ventricles, suggesting that the arterial input function of H₂¹⁷O is delayed by restricted water diffusion in addition to convective transit delays. Delivery as a brief pulse therefore offers significant advantages in relating MR signal changes directly to metabolism.

A controlled release product is provided having a suppressed initial release period and a predetermined longevity. The product includes a particulate water soluble core material and a semi-permeable coating layer applied on the core material for controlling the release rate of the core material. The semi-permeable coating layer is formulated in accordance with the following equation to provide a release rate wherein initial release of core material from the product is suppressed so that less than about 15 weight percent of core material is released from the product within a 24 hour period after application of the product and wherein longevity of release, at ambient temperature, between the time of application and the time at which at least about 75 weight percent of the core material is released from the product is 60 days or less: $\mathrm{WVTR}=\frac{\varphi ·\delta }{\pi d^2}$

wherein:

• • (i) WVTR is the water vapor transmission rate of the semi-permeable coating expressed in grams·μm/meters²·day;
  • (ii) φ is the water diffusion rate (water flux) through the semi-permeable coating expressed in grams/day;
  • (iii) δ is the thickness of the coating layer expressed in μm; and
  • (iv) d is the average diameter of the particulate core material expressed in meters.

The invention provides a rainwater collection diversion and strata conservation regulation and storage system comprising a water collection tank, a filter tank, a sedimentation basin, a regulation and storage pool and a control system; the water collection tank is connected with the filter tank, and a filter grid is arranged on a connecting portion between the water collection tank and the filter tank; a water exit of the filter tank is connected with the sedimentation basin, and a filtering net is arranged on a connecting portion of the two; the sedimentation basin is connected with the regulation and storage pool through a rainwater inflow pipe arranged above a side wall; the side wall of the regulation and storage pool is provided with an overflow pipe and water diffusion pipes uniformly arranged around the overflow pipe, wherein the overflow pipe is connected with a municipal downpipe net, and the water diffusion pipes extend outwards to surrounding soil by taking the regulation and storage pool as a center; the rainwater collection diversion and strata conservation regulation and storage system is controlled by the control system, and can collect, purify, store and divide road rainwater, thus realizing peak clipping, regulating, storing, strata conserving and water ecology restoring purposes, and providing important reference meanings for construction of a sponge city.

The invention relates to a sterilization composition containing cyanoacrylate bactericide and metalaxyl-M. The sterilization composition is prepared by carrying out binary compounding on effective components, namely the cyanoacrylate bactericide and the metalaxyl-M. The mass ratio of the cyanoacrylate bactericide to penconazole is 1-40 to 40-1; the mass percentage of the effective components, namely the cyanoacrylate bactericide and the metalaxyl-M, in the preparation is 1-80 percent; and other components are pesticidally allowable and acceptable auxiliary components. The sterilization composition can be in the form of missible oil, suspension agent, wettable powder, water diffusion particle, water emulsion, microemulsion, granules and micro capsules and can be used for preventing and treating downy mildew, phytophthora root rot, pythium, wheat gibberellic disease, cotton fusarium wilt, banana panama disease, fusarium moniliforme sheld, watermelon fusarium wilt and the like.

The invention provides a composite insulator interface flaw detection method based on a water diffusion and dissection method. The method comprises the steps: (1) intercepting a plurality of samples, and recording obvious aging phenomenon on each sample before the samples are intercepted; (2) pre-aging each sample in a boiling way; (3) carrying out a pressure test on each sample, recording a leak current value and local abnormal temperature rising phenomenon; (4) dissecting each sample, pulling an umbrella skirt of each sample along the radial direction, and recording the residual amount of a silicone rubber material on the surface of a core bar of each sample; and (5) checking and accepting each sample according to an acceptance criterion according to the recorded result. By boiling the insulator with a jacket, the aging of the composite insulator interface is accelerated, so that early prediction on the insulator having the interface potential danger can be realized, the missing rate of the detection on the flaw of the interface can be greatly reduced, and the interface flaw of the composite insulator can be effectively detected. The method has advantages of being high in accuracy, easy to realize, low in cost and the like.

The invention discloses a wet-conducting, sweat-eliminating and anti-bacterial treatment technology for super cotton-like fabric. The wet-conducting, sweat-eliminating and anti-bacterial treatment technology for the super cotton-like fabric is completed through steps of pretreatment, corona plasma treatment and polybasic carboxylic acid crosslinking treatment. The crosslinking action of polybasiccarboxylic acid replaces the function of a traditional film-forming adhesive, the anti-bacterial, deodorizing and self-cleaning super cotton-like fabric with composite comfortable health care functions of absorbing moisture, eliminating sweat and the like is prepared under the synergistic effect of photocatalysis, inclusion and plants of a nano-photocatalysis/cyclodextrin/plant extractant, dropping water diffusion time is shorter than or equal to 3 s, water vapor transmission is larger than or equal to 10000 g/m<2>*24 h, wicking height is larger than or equal to 100 mm, evaporation rate is higher than or equal to 0.18 g/h, antibacterial rate and deodorizing (ammonia) rate are higher than or equal to 90%, and chili oil self-cleaning is higher than or equal to level 4.

The invention discloses an SPE electrolytic cell module with a composite flow field, which is produced by assembling an anode bipolar plate, an anode diffusion layer, an anode catalytic layer, a proton exchange membrane, a cathode catalytic layer, a cathode diffusion layer and a cathode bipolar plate. An anode bipolar plate flow path is etched on a surface, which is connected to the anode diffusion layer, of the anode bipolar plate. A pure water inlet and a water oxygen outlet are disposed in the anode bipolar plate flow path. A cathode bipolar plate flow path is etched on a surface, which is connected to the cathode diffusion layer, of the cathode bipolar plate. A hydrogen gas outlet is disposed in the cathode bipolar plate flow path. Each of the anode bipolar plate flow path and the cathode bipolar plate flow path is composed of a composite flow path which includes not less than five sections in a manner of folded connection from top to bottom successively to form a snake-shaped path. A fluid flows in the snake-shaped path. A cylinder group, which is designed in a dot matrix structure, is disposed at each of a front end and a back end of each section of the flow path. The middle part of each section of the flow path is a parallel flow path ridge. The SPE electrolytic cell module greatly improves pure water diffusion performance and oxygen discharge capability of the anode bipolar plate, is low in pressure drop along the path, has high flow path area and has high work efficiency of a membrane electrode.

The invention relates to a microwave/hot air collaborative drying method of a paste-like coating, which belongs to the technical field of microwave heating application. the method comprises the following steps of: respectively adjusting microwave power and hot air volume for a coating with water content of 75-90 wt% in a preheating drying stage, a constant speed drying stage and a decelerating drying stage according to water evaporation rate and water diffusion rate in the coating; and fast and deeply drying the coating at a lower temperature. Compared with other drying methods, the microwave-hot air collaborative low temperature fast and deep drying method of the paste-like coating, which is provided by the invention, has the advantages of energy conservation, environment friendliness and high drying speed; and because the drying temperature is lower, high temperature oxidization of a coating metal substrate can be effectively avoided.

The invention is based on the realization that brain cancer cells spread preferentially along paths of elevated water diffusion, such as along nerve fiber bundles, that can be measured by magnetic resonance (MR) diffusion-weighted imaging (DWI) and the migration of cancer cells away from the primary tumor can be predicted using computational models that incorporate DWI information. The invention therefore applies DWI and models cell migration to develop appropriate non-symmetric margins for radiation treatment of malignant brain tumors.

The invention discloses an agricultural irrigation device integrating sprinkler irrigation and drip irrigation. The device includes a base, wherein an upper surface of the base is fixedly connected with a water storage tank, a filter mechanism is arranged above the water storage tank, a right side of the water storage tank is equipped with a sprinkler irrigation mechanism, a left side of the waterstorage tank is equipped with a drip irrigation mechanism, and the filter mechanism includes a support base, a filter box, a partition, a through hole, a fine particle filter, a coarse particle filter, a water supply pipe, a funnel and an outlet pipe. The device is advantaged in that an electric water pump arranged inside the water storage tank can effectively improve the water diffusion effect,effectively enhance uniformity of the irrigation device as a whole during crop spraying, effectively avoid local crops from dying due to uneven spraying of the irrigation device, effectively improve the survival rate of the crops, effectively reduce labor intensity of farmers and effectively improve the overall use of the irrigation device.

The plastic optical component includes a main body and a transparent moisture-proof coating provided on all surfaces of the main body, the moisture-proof coating satisfying the following relation (1):

(D1/d)×(L/D2)<10   (1)

where D1 (mm²/s) is a water diffusion coefficient of a first material of which the moisture-proof coating is made, d (mm) is a thickness of the first material, D2 (mm²/s) is the water diffusion coefficient of a second material of which the main body is made, and L (mm) is an average thickness across an optical surfaces of the second material.

The invention discloses a multilayer countercurrent rotating packed bed apparatus. The apparatus comprises a closed cylinder shell, a mandrel penetrating through the cylinder shell, and above two rotating packed beds. Each of the rotating packed beds comprises a porous inner ring, a porous outer ring, a cavity limited between the porous inner ring and the porous outer ring, a hollow upper cover and a chassis fixed on the mandrel, and the cavity of each of the rotating packed beds is filled with a solid filling substance. A tubular water diffusion disc is matched with a position above each of the rotating packed beds, and the tubular water diffusion disc comprises a hollow circular ring, a hollow disc and above one water diffusion tube. The hollow circular ring is connected to the hollow disc, the water diffusion tube is connected to a position below the hollow circular ring, and the water outlet of the water diffusion tube is positioned at the inner side of the porous inner ring of each of the rotating packed beds. The multilayer countercurrent rotating packed bed apparatus successfully increases the gas-liquid mass transfer area in order to improve the gas-liquid mass transfer effect.

A material for manufacturing wet tissues for wiping transparent glassy hard surface is composite non-fabric cloth composed of an upper fiber net layer, a middle absorption layer, and a lower fiber net layer; wherein the upper fiber net layer and the lower fiber net layer consist of fiber nets, the fiber nets are made of double-component fibers with a skin-core structure, the double-component fibers have been processed through a hydrophilic treatment, the fiber length of the double-component fibers is from 38 to 60 mm, and the fiber fineness of the double-component fibers is from 2 to 6 deniers; the middle layer is a layer of substance which is prepared from cellulosic fibers and thermoplastic fibers and has a high hygroscopic property; the double-component fibers is preferably any one component selected from polyethylene/polypropylene or polyethylene/polyester, wherein the material of the outer layer is polyethylene; and the thermoplastic fiber adopted in the absorption layer is the same polyethylene of the outer layer material of the double-component fibers. The material for wiping wet tissues has the advantages of good water-retention rate, good water diffusion performance, and low scrap dropping rate, can meet the requirements of no water-logging and wiping trace, quick drying, and no scrap dropping, and can be applied to the field of high-end wiping wet tissue. The invention also relates to a preparation method of the material for wiping wet tissues.

The invention discloses a fabric surface microcosmic water diffusion process visualization method based on SPH (smoothed particle hydrodynamics). The method comprises following steps: creating an SPH microcosmic water fluid; looking up space grids of the SPH microcosmic water fluid; acquiring surface tension and a contact angle based on the SPH microcosmic water fluid; designing a fabric structure; designing diffusion channels based on the fabric structure; designing collision and absorption of the microcosmic water fluid and fabric. From the point of the small-scale water fluid, the method is mainly specific to reactions between different small-scale fluids in a three-dimensional space and fabric made of different materials during contact as well as simulation of the diffusion process of fluid molecules in the fabric, and visualized display of results is performed.

The invention relates to a device and a method for ecological treatment of private household type domestic drainage. The device consists of an anaerobic filtering tank, a water diffusion aerobic tank and a functional porcelain granule underground infiltration bed in serial connection. The detailed device structure and the method are shown as an instruction book. The device and the method have the advantages that mass solid is intercepted through anaerobic filtering; activity of microorganism is increased through water diffusion and oxygen increase; an infiltration layer consisting of functional porcelain granules and zeolite filled through 'wall-bricking' nesting and filling is introduced to an underground infiltration gravity filtering section so that an underground infiltration system has good hydraulic conduction performance, high-efficiency self-desorption capacity, high hydraulic load, remarkable chromatographic effect of pollutants and uneasy blockage; a material for producing the functional porcelain granules has wide source, convenient machining and low cost; a water distribution mode of capillary adsorption increases a sewage purification path in the system and improves effective cubage of the system; and the device operates under powerless condition, does not increase building cost and is in particular suitable for deep treatment of villa and private household type domestic drainage.

The invention discloses a weeding composition containing topramezone and cyanazine. The weeding composition is characterized by taking the topramezone and the cyanazine as effective components, and the mass ratio of the topramezone to the cyanazine is 1-70 to 70-1; in the preparation, the total mass of the effective components, namely the topramezone and the cyanazine accounts for 1-80 percent of the mass of the whole preparation; and other components in the weeding composition are pesticidally allowable and acceptable auxiliary components. The weeding composition can be in the form of missible oil, suspension agent, wettable powder, water diffusion particle, water emulsion, microemulsion, granules and micro capsules. The weeding composition is mainly used for preventing and removing various gramineous weeds and broad-leaf weeds.

The invention relates to a method for evaluating matrix flow and preferential flow degrees of an earth and stone binary medium and belongs to the field of soil hydrodynamics. An actual flow mode of water infiltration is characterized with brilliant blue and potassium iodide. Researches show that, water transfer is mainly completed by virtue of actions of matrix flow, preferential flow, matrix-preferential mixed flow and water diffusion, while under the earth and stone binary medium condition, the water diffusion action has less influence and can be neglected. Therefore, a preferential flow water transfer mode is characterized by a Blue-FCF staining profile, a matrix flow-preferential flow mixed transfer mode is characterized by a potassium iodide staining profile, and then the potassium iodide staining area except the Blue-FCF staining part is considered as a matrix flow dominant area. Based on the principle, by virtue of an image processing technology, the invention provides a methodfor calculating a matrix/preferential flow contribution ratio (respectively represented by CR matrix flow and CR preferential flow) and a matrix/preferential flow infiltration path relative quantity ratio, thereby evaluating the matrix/preferential flow degree of the earth and stone binary medium.

The invention discloses a method of preparing a water-retain slow-release humic acid biological fertilizer through activation of brown coal humic acid. Dissolution of the humic acid is conducted through brown coal put in an alkaline condition, so that the specific surface area and the pore structure of the brown coal are increased; copolymerization of the humic acid and macromolecule organic under a certain condition is conducted to form a water-retain film with a rough surface, and a good water-absorbing quality, a water-retain quality after water-absorbing swelling and mechanical strength are provided; a center coating layer is formed through paraffin and polyisocyanate and used for providing water and nutrient diffusion with a physical barrier, and the speeds of the water diffusion into the fertilizer and nutrient diffusing out are reduced, so that according to the obtained coated fertilizer, slow and controlled releasing of the fertilizer are provided, and the use ratio of the fertilizer is improved. The coated fertilizer has the advantages that production technology is simple, the cost is low, large-scale production can be conducted, soil can be effectively improved, land is maintained while being used, crop nutrition is improved, all stress resistances are enhanced, and the yield and quality of crops are improved.

The invention discloses an experimental device for testing efficiency of a water turbine for a cooling tower. The experimental device comprises a water pool, a main circulation pipeline, a circulation water pump, a flow measurement device, a pressure measurement device, a torque measurement device, a speed measurement device and a tail water diffusion device, wherein the circulation water pump and the flow measurement device are arranged on the main circulation pipeline; the pressure measurement device, the torque measurement device, the speed measurement device and the tail water diffusion device are arranged at the position of a water outlet of the main circulation pipeline; and a water inlet of the main circulation pipeline is communicated with the water pool. After the experimental device is installed on the water turbine, flow of the circulation water pump is adjusted through an electric device to simulate circulation water systems under different working conditions; the flow measurement device and the pressure measurement device are utilized respectively to measure flow of water in the pipeline and water outlet pressure; the torque measurement device and the speed measurement device are utilized respectively to measure torque and rotation speed of the water turbine; and then actual efficiency of the water turbine to be tested is obtained. The experimental device is simple in testing method and accurate in testing data due to concentration test.