130results about How to "Porous structure" patented technology

The present invention provides a neutralized glucomannan scaffold capable of promoting cell growth and suitable for three-dimensional tissue culture and engineering. The present invention also provides methods for making and degrading the neutralized glucomannan scaffold. The present invention further provides a method of growing cells on a neutralized glucomannan scaffold.

The invention relates to a preparation method for a core-shell perovskite-type catalyst for preparing methanol through methane. The general formula of the core-shell perovskite-type catalyst is Fe2O3@A(1-m)A'mB(1-n)B'nO3. The preparation method for the core-shell perovskite-type catalyst comprises the following steps: adding nano-sized or micron-sized Fe2O3 into ethanol; dispersing under the effect of ultrasonic waves; removing the supernatant after complete precipitation; using ultrasonic waves to disperse Fe2O3 into deionized water to obtain a Fe2O3 suspension; adding soluble salts corresponding to A, A', B and B' to deionized water; stirring to allow the soluble salts to dissolve completely; adding a complexing agent; after heating and stirring for complexing, adding to the Fe2O3 suspension; stirring evenly; adding glycol; after thorough stirring, evaporating to obtain a colloidal mixture; drying and roasting to obtain the core-shell perovskite-type catalyst. The core-shell perovskite-type catalyst is a perovskite-type oxide catalyst of a core-shell structure; the active constituent, namely Fe2O3 is wrapped in the perovskite oxide, so that the phenomenon that the Fe2O3 is reduced to elementary substance Fe in the catalytic oxidation process, and the activity of the core-shell perovskite-type catalyst declines due to the sintering and accumulation of the Fe, is effectively prevented.

The invention relates to a method for producing three-dimensional molded parts in two method steps and infiltrating the molded part, as well as a material system.

The invention provides a magnetic graphene-loaded palladium nano-composite catalyst and a preparation method thereof. Graphene is loaded with palladium nano-particles while formed through hydrothermal reduction of magnetic graphene oxide, the magnetic graphene loaded palladium nano-composite catalyst is prepared, and the catalyst comprises nickel ferrite loaded graphene carriers and palladium nano active ingredients. The palladium nano-particles of the composite catalyst prepared with the method are evenly distributed, the magnetic effect is higher, and the composite catalyst can be recovered quickly through magnetic separation.

The invention belongs to the field of metallurgy and chemical engineering and particularly relates to a method for preparing a titanium-rich material for fluidizing chlorination from high-calcium-magnesium low-grade titanium slag. The method for preparing the titanium-rich material for fluidizing chlorination from the high-calcium-magnesium low-grade titanium slag comprises the following steps that (1) the titanium slag is dried and sieved; (2) a high-temperature strong oxidation reaction is conducted on titanium concentrate under the temperature of 950-1000 DEG C; (3) then a weak reduction reaction is conducted under the temperature of 800-850 DEG C; (4) hydrochloric acid is added, and pressure leaching is conducted under heating rotation conditions; and (5) solids and liquids are separated, and the titanium-rich material finished product is obtained through washing and drying. Through the method, the titanium slag similar to Panzhihua high-calcium-magnesium low-grade titanium slag can be treated successfully, thereby being updated for preparing high-quality titanium-rich raw materials meeting the needs of fluidizing chlorination, and significance is achieved for utilizing complextitanium resources of the west of Panzhihua and for developing titanium chloride dioxide.

The invention relates to a modified biological adsorbent and a preparation method thereof. The preparation method includes the steps of 1), subjecting dried and ground cordyceps militaris fungus chaffto swelling pretreatment for 4-6 hours in a sodium hydroxide aqueous solution to obtain cordyceps militaris fungus chaff after swelling treatment; 2), adding the cordyceps militaris fungus chaff after swelling treatment to anhydride compounds dissolved N,N-Dimethyl formamide for reaction at the temperature of 65-85DEG C for 2-4 hours to obtain an intermediate product I; 3), adding the intermediate product I into an ethylenediamine aqueous solution for stirring reaction at the temperature of 80-90DEG C for 1-3 hours to obtain an intermediate product Ii; 4), evenly mixing the intermediate product II with a sodium alginate solution, adding epichlorohydrin for reaction at the temperature of 50-60DEG C for 30-60 minutes, performing filtration to obtain a solid object, and drying the solid object to obtain the modified biological adsorbent. The prepared modified biological adsorbent has quite good adsorbent effect on metal ions and dye molecules and can be recycled.

The invention relates to a processing method of coarse cereal products convenient to compound, and belongs to the field of grain processing. The products consist of the following raw materials in parts by weight: 60-80 parts of rice and 20-40 parts of precooked coarse cereals, wherein the precooked coarse cereals consist of the following ingredients in parts by weight: 15-20 parts of brown rice, 10-14 parts of oat, 10-14 parts of black rice, 12-15 parts of small red beans, 8-10 parts of mung beans, 10-15 parts of millet, 5-10 parts of corn grits, 3-5 parts of walnuts, 1-3 parts of black sesameseeds and 5-8 parts of red jujubes. The brown rice, the oat, the black rice, the small red beans and the mung beans in the ingredients are processed into the precooked coarse cereals through steps ofimpurity removal, soaking with NaHCO3, screening, microwave noncontinuous type heating and the like. Compared with a traditional technology, the processing method disclosed by the invention is simpler, fewer in operating procedures, shorter in precooking time and lower in energy consumption; and the products are rich in nutrients and convenient and swift, and have the efficacy of nourishing the kidney, boosting essence, nourishing the liver to improve visual acuity, replenishing blood, soothing the nerves, moistening lung for arresting a cough and the like.

Device and method for lasering biological tissue. In a general aspect, the device for lasering a biological tissue may include a source configured to provide a pulsed laser beam, an outcoupler configured to couple the laser beam towards the tissue, and an outfeeder configured to feed a photosensitizer in a direction of the tissue where the outfeeder is connected to the outcoupler. In another general aspect, a method for lasering a biological tissue may include applying a photosensitizer towards the tissue, providing a pulsed laser beam, and lasering a site of the tissue with the pulsed laser beam where the laser beam is emitted with a temporal width at a half maximum range from about 1 ps to about 100 ps.

The present invention provides a biological composite artificial trachea and its preparation method in combination with 3D printing technology. The material used in the present invention has both flexibility and certain mechanical strength, which meets the physical and mechanical properties of the trachea as a hollow organ in the thoracic cavity; secondly, The artificial trachea of ​​the present invention has a porous and loose structure, which is conducive to the diffusion of nutrients and the growth of autologous blood vessels; in addition, the present invention prints the seed cells obtained from the expansion of the recipient's own airway epithelial cells and chondrocytes in the trachea wall, The patient's rejection of the cells is avoided; moreover, the seed cells are composed of terminally differentiated mature cells, which avoids the problem of inducing differentiation and the risk of tumor formation caused by the use of stem cells; at the same time, the spatial distribution of the cells in the present invention is The printing is precise and controllable, and the distribution according to histological laws accelerates the repair process; finally, the tracheal stent can be degraded in the body, reducing the complications caused by foreign body residues in the body, and avoiding the risk of secondary surgical removal.

The invention discloses a metal product surface protection method which comprises the following steps: pretreatment: carrying out clearing, degreasing, cleaning and restoration on the metal product surface to be protected; treatment before deposition: putting the pretreated metal product in an atomic layer deposition device, purging the surface with carrier gas, and meanwhile, evacuating the atomic layer deposition device by using a vacuum pump; deposition: alternately introducing multiple precursors at proper reaction temperature under proper pressure to respectively adsorb the precursors to the surface to be protected, and initiating chemical reaction among the precursors to form a single-layer film; and repeating the deposition step to generate a compact film on the surface to be protected, thereby implementing water-barrier oxygen-barrier protection on the metal product surface. The method can solve the problems of insufficient compactness, nonuniform thickness, short service life, high tendency to generating gloss and the like in the existing protective film on the metal product surface.

The invention relates to a flexible fire-proof and explosion-proof blanket for a cable intermediate joint, which comprises a fire-proof heat-insulation outer sheath, a fire-proof heat-insulation inner sheath, and a fire-proof cotton layer, an expandable graphite particle layer, a graphite-based flexible blanket, an explosion-proof fiber layer and a waterproof fiber layer which are clamped between the fire-proof heat-insulation inner sheath and the fire-proof heat-insulation outer sheath and are sequentially laminated, the peripheral edges of the fire-proof heat-insulating outer skin and the fire-proof heat-insulating inner skin are sewn together, a plurality of strapping tapes are sewn on the fire-proof heat-insulating outer skin side by side, and the fire-proof explosion-proof blanket is wrapped at the intermediate joint of the cable through the strapping tapes. The flexible fire-proof and explosion-proof blanket has excellent comprehensive protection performance, especially fire-proof and explosion-proof performance, the intermediate joint of the cable is coated through the strapping tapes in the using process, and the flexible fire-proof and explosion-proof blanket is convenient to use and install and can be repeatedly used.