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43 results about "Endodermis" patented technology

The endodermis is the central, innermost layer of cortex in land plants. It is a cylinder of compact living cells, the radial walls of which are impregnated with hydrophobic substances (Casparian strip) to restrict apoplastic flow of water to the inside. The endodermis is the boundary between the cortex and the stele.

Compound medicament intravascular stent and preparation method thereof

The invention relates to a composite drug stent and a preparation method thereof. The stent includes a stent body and active drugs; wherein, the stent body is a perforated medical material with good biocompatibility, which can be made by optionally using stainless steel, cobalt-based alloy, titanium alloy, nickel-titanium alloy, or polylactic acid bio-polymer material; the active drugs include special endothelial progenitor cell antibody drug and anti-smooth muscle cell proliferation drug. The internal surface of the perforated stent body is fixedly provided with the special endothelial cell antibody drug, while the external surface of the perforated stent body is coated with the anti-smooth muscle cell proliferation drug. The preparation method includes as follows: (1) pretreating the surface of the stent body; (2) making holes; (3) post-treating the surface of the stent body; (4) dispensing medicines; (5) coating the external surface; (6) fixing the internal surface; (7) drying at low temperature. The preparation method can selectively absorb endothelial progenitor cells and facilitate in repairing endodermis, and can effectively inhibit the proliferation and migration of vascular smooth muscle cells, persistently and effectively reduce the newborn endangium, effectively prevent the stent from narrowing, and avoid the risk of tardive thrombosis.
Owner:LEPU MEDICAL TECH (BEIJING) CO LTD

Three-component five-hole hollow fibrous membrane and preparation method thereof

The invention relates to a three-component five-hole hollow fibrous membrane, which comprises the following components: 60-80wt% of polyvinylidene fluoride, 10-30wt% of polymethylmethacrylate and 10-30wt% of polrvinyl chloride; and the section of the membrane is provided with five holes. The membrane is divided into five layers from the outside to the inside, which are sequentially a cortical layer, a sub finger-shaped hole supporting layer, a thumb-shaped hole supporting layer, a sub finger-shaped hole supporting layer and an endodermis layer and is in a bidirectional asymmetrical structure. The preparation method comprises the steps of adding solvent and PVP for dissolution after mixing the materials in a certain proportion, oscillating Al2O3 nanoparticles and the solvent via ultrasound for 2 hours, evenly stirring the solution, standing still for 24h for deaeration, and then making the membrane through spinning with a dry-wet spinning process. The five-hole membrane has the advantages of large water flux, high rejection rate, excellent mechanical properties and the like, the preparation process is simple, the energy consumption and the operation cost are low, raw materials are obtained conveniently and are environmentally friendly, and the method is suitable for industrial production.
Owner:DONGHUA UNIV

Endothelialization system for surface of induction degradable blood vessel stent

The invention discloses an endothelialization system for the surface of an induction degradable blood vessel stent. The system comprises a degradable magnetic material blood vessel stent, magnetic nano targeting grains and an external magnetic field; the degradable magnetic material blood vessel stent is implanted into a human body in a non-magnetic manner; the magnetic nano targeting grains can be in specificity combination so as to be used for cells for repairing endodermis and have magnetic response; and the external magnetic field is controllable in strength and is used for leading the degradable magnetic material blood vessel stent to magnetize outside the human body so as to generate a high magnetic field. In the technical scheme, after the degradable magnetic material blood vessel stent is implanted in the human body, magnetization is realized under the effect of the external magnetic field so as to generate the high magnetic field, the cells which are combined with the magnetic nano targeting grains and used for repairing the endodermis are attracted to the surface of the stent, fast endothelialization of an implanted portion of the stent is realized, targeting property of the magnetic nano targeting grains is good, application quantity is controller, and the magnetic blood vessel stent can be degraded gradually and disappears finally. The endothelialization system is applicable to patients with coronary heart disease, and simultaneously has reference significance for diseases of cancer, tumor and the like.
Owner:CO WITH LTD LIABILITY OF MEDICAL SCI +1

Preparation method of uni-endodermis hollow fiber infiltrating and vaporizing membrane

The invention relates to a method for preparing a single-endoderm hollow fiber pervaporation membrane, and belongs to the membrane separation field. The pervaporation membrane has very strict requirement on the integrity and the compactness of a separating layer, and the existing dry-wet phase inversion method is difficult to directly prepare the flawless hollow fiber pervaporation membrane. Because the inside diameter of a hollow fiber membrane ranges from 0.5 to 1.5mm commonly, a coating method is hard to be directly adopted to compound the separating layer to the inner surface of fiber. Therefore, the preparation of the single-endoderm hollow fiber pervaporation membrane is a technical difficult problem. In the method for preparing the single-endoderm hollow fiber pervaporation membrane, a recycle pump is utilized to pump polycation and polyanion solution to a hollow fiber inner-cavity alternately and repeatedly; a certain negative pressure is exerted outside the fiber to form a vacuum side to realize that polyion solution is filtered under the negative pressure, thereby forming a composite layer with certain separated function on the inner surface of the hollow fiber. Pervaporation experiment shows that the preparation method can be utilized to prepare the single-endoderm hollow fiber pervaporation membrane with high performance.
Owner:BEIJING UNIV OF TECH

Repairing agent for treating alkaline cadmium-contaminated soil and preparation method thereof

The invention relates to the technical field of agricultural environment conservation and restoration, in particular to a repairing agent for treating alkaline cadmium-contaminated soil and a preparation method thereof. The preparation method comprises the following steps: weighing blast furnace slag, sepiolite, bentonite and flue gas desulfurization gypsum in proportion, uniformly mixing, addingfulvic acid, and mixing to obtain the repairing agent. The preparation method of the invention has the following advantages: the raw materials are easily available; the operation is simple; the preparation cost of the repairing agent can be controlled within 800 yuan/ton, the dosage per acre is 100-300 kg, the cost of the repairing agent per acre is only 80-240 yuan, and the repairing agent can bewidely promoted and used at large scale. By the principle of multi-dimensional repairing, the activity of cadmium in soil can be reduced through sedimentation, adsorption and complexation, and the upward transfer of cadmium in crops can be inhibited through deposition on the endodermis and formation of -SH (sulfhydryl). The two-pronged approach makes it possible to effectively reduce the contentof cadmium in agricultural products.
Owner:环保桥(湖南)生态环境工程股份有限公司

Anti-restenosis intraluminal stent material

InactiveCN106620897ARestore balanced growthImprove balanceSurgeryFlagellar basal bodyEndoluminal stent
The invention discloses an anti-restenosis intraluminal stent material. The anti-restenosis intraluminal stent material comprises a biocompatible endoprosthesis material, a micro slot, a composition capable of being degraded to release Fe<3+>, a degradable polymer coating and a short peptide layer, wherein the biocompatible endoprosthesis material comprises a basal body; a material of the basal body is degradable in a tissue body; the basal body is tubular, and has tubular inner and outer surfaces, and the inner surface forms a channel for allowing a tissue fluid, for example, blood, to pass through; the micro slot is positioned in the outer surface, the depth of the micro slot is smaller than the thickness of the tubular basal body, the micro slot can be a rectangular groove parallel to the axial direction of the basal body or an annular groove along the perimeter of the basal body or a W-shaped groove in the axial direction of the basal body; the composition capable of being degraded to release the Fe<3+> is loaded in a micro cavity, and can be degraded in the tissue to release the Fe<3+>; the degradable polymer coating coats on inner and outer surfaces of the basal body, and a degradation rate of the coating is higher than that of the basal body; the short peptide layer coats on the degradable polymer coating, and comprises a first short peptide and a second short peptide; the first short peptide and the second short peptide can be self-assembled to form hydrogel; and the hydrogel formed by self-assembling the short pepetide layer can be specially beneficial for climbing and covering of endothelial cells and regenerating of endodermis.
Owner:HUNAN PROVINCIAL PEOPLES HOSPITAL +1

Compound medicament intravascular stent and preparation method thereof

The invention relates to a composite drug stent and a preparation method thereof. The stent includes a stent body and active drugs; wherein, the stent body is a perforated medical material with good biocompatibility, which can be made by optionally using stainless steel, cobalt-based alloy, titanium alloy, nickel-titanium alloy, or polylactic acid bio-polymer material; the active drugs include special endothelial progenitor cell antibody drug and anti-smooth muscle cell proliferation drug. The internal surface of the perforated stent body is fixedly provided with the special endothelial cell antibody drug, while the external surface of the perforated stent body is coated with the anti-smooth muscle cell proliferation drug. The preparation method includes as follows: (1) pretreating the surface of the stent body; (2) making holes; (3) post-treating the surface of the stent body; (4) dispensing medicines; (5) coating the external surface; (6) fixing the internal surface; (7) drying at low temperature. The preparation method can selectively absorb endothelial progenitor cells and facilitate in repairing endodermis, and can effectively inhibit the proliferation and migration of vascular smooth muscle cells, persistently and effectively reduce the newborn endangium, effectively prevent the stent from narrowing, and avoid the risk of tardive thrombosis.
Owner:LEPU MEDICAL TECH (BEIJING) CO LTD

Constructing device and constructing method of artificial liver lobule functional unit

The invention discloses a constructing device and a constructing method of an artificial liver lobule functional unit. The constructing device comprises a liver plate basal layer, a liver parenchyma cell zone and a fluid passageway layer, wherein a liver plate patterning groove is formed in the liver plate basal layer through processing; the fluid passageway layer comprises a fluid inlet passageway, an endothelial cell oriented growth zone and a fluid outlet passageway. The constructing method corresponding to the constructing device comprises the following steps: paving collagen containing liver parenchyma cells to the inner part of the liver plate patterning groove, bonding the liver plate basal layer with the fluid passageway layer after solidifying the collagen, pouring an endothelialcell suspension solution to the endothelial cell oriented growth zone, and enabling a cell culture medium solution to unidirectionally flow in the fluid inlet passageway, the endothelial cell orientedgrowth zone and the fluid outlet passageway after increasing endothelial cells to a certain amount. According to the constructing device and the constructing method, disclosed by the invention, reallayer-to-layer position relationship between endodermis and liver parenchyma cells is realized under dynamic culturing, the response of the liver parenchyma cells to physicochemical and biochemical irritation under the protection of the endodermis of blood vessels more tends to reality, and a more accurate result can be obtained when the artificial liver lobule functional unit is applied to drug screening, case research and therapy detection.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Preparation method for lark feedstuff

The invention relates to a preparation method for lark feedstuff. The feedstuff comprises the following compositions in percentage by weight: 10 to 12 percent of pea meal, 8 to 10 percent of corn meal, 10 to 12 percent of yolk powder, 5 to 7 percent of fresh clamworm powder, 6 to 8 percent of peanut cake powder, 8 to 10 percent of worm powder, 12 to 14 percent of white fish meal, 4 to 6 percent of fishbone powder, 6 to 8 percent of apple powder, 10 to 12 percent of carrot powder, 2 to 4 percent of cod-liver oil, 0.5 to 1.5 percent of vitamin B1, 0.5 to 1.5 percent of psoraleae, 0.5 to 1.5 percent of eucommia, 0.5 to 1.5 percent of unibract fritillary bulb, 0.5 to 1.5 percent of endodermis of chicken gizzard, 0.5 to 1.5 percent of phellodendron, 0.5 to 1.5 percent of plantain seed and 0.5 to 1.5 percent of red sage root. The preparation method comprises the following steps: putting the powder agents in a stirrer according to the proportion and stirring for 130 minutes; taking the powder agents out and putting the powder agents in a pulverizer to crush the powder agents into powder; taking the powder out and putting the powder in a drier; controlling the dryness degree of the dried substances to between 70 and 85 percent and the drying time to between 40 and 60 minutes; taking the dried substances out and putting the dried substances in an expander for expansion; and controlling the temperature of the expander to between 75 and 85 DEG C, the expansion time to between 1 and 2 hours and the dryness degree of the expanded substances to between 90 and 95 percent.
Owner:王先德

Nano probe transfected adipose-derived cell and application thereof in preparing MRI (magnatic resonance imaging) dynamic tracer

The invention belongs to the field of cytobiology, and relates to a nano probe transfected adipose-derived cell and application thereof in preparing an MRI (magnatic resonance imaging) dynamic tracer. The adipose-derived progenitor/stem cell is separated and screened from adipose tissues, the phenotype of the adipose-derived progenitor/stem cell is identified by stream mode, immune fluorescence, molecular biology and other methods, and the inward epidermic cell differentiation is induced. After the nanoparticle labeled adipose-derived endodermis progenitor/stem cell is prepared into an MRI dynamic tracer, the in-vivo transplantation vascular injury restoration test, which is used for evaluating vascular endodermis conditions by transmission electron microscope, immunofluorescence, real-time PCR (polymerase chain reaction) and other methods according to the in-vivo survival, migration, outcome and restoration vascular injury conditions of the nuclear magnetic resonance dynamic tracing adipose-derived endothelium progenitor/stem cell at different time points, proves that the nano probe transfected adipose-derived cell can illuminate the mechanism of the adipose-derived endodermis progenitor/stem cell in vascular injury restoration. The nano probe transfected adipose-derived cell can provide new practice data for vascular injury treatment as well as new seed cell sources and experimental reference.
Owner:SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE

Preparation method for azure-winged magpie feedstuff

The invention relates to a preparation method for azure-winged magpie feedstuff. The feedstuff comprises the following compositions in percentage by weight: 10 to 12 percent of soybean protein powder, 8 to 10 percent of broomcorn protein powder, 8 to 12 percent of yolk powder, 9 to 11 percent of carrot powder, 7 to 9 percent of cornmeal, 10 to 14 percent of broomcorn powder, 5 to 7 percent of red worm powder, 6 to 8 percent of perilla frutescens powder, 7 to 9 percent of golden millet powder, 2 to 6 percent of cod-liver oil, 2 to 4 percent of vitamin B complex, 1 to 3 percent of mulberry leaf, 1 to 3 percent of endodermis of chicken gizzard, 1 to 3 percent of turtleback, 1 to 3 percent of fruit of glossy privet, 1 to 3 percent of rhizoma anemarrhenae and 1 to 3 percent of asparagus root. The preparation method comprises the following steps: putting the powder agents according to the proportion in a stirrer to stir for 130 minutes; taking out and putting the mixture in a pulverizer to crush the mixture into powder; taking out and putting the powder in a drier for drying; taking out and putting the dried powder in an annular die-type expander for expansion; taking out and putting the expanded powder in an annular die-type hard granulation machine so as to produce depositional hard granular feedstuff; sieving by a 10-mesh sieve and ensuring that the weight of each granule ranges from 0.02 to 0.03g so as to carry out sealed package according to required weight.
Owner:王先德

An anti-restenosis intraluminal stent material

InactiveCN106620897BRestore balanced growthImprove balanceSurgeryFlagellar basal bodyEndoluminal stent
The invention discloses an anti-restenosis intraluminal stent material. The anti-restenosis intraluminal stent material comprises a biocompatible endoprosthesis material, a micro slot, a composition capable of being degraded to release Fe<3+>, a degradable polymer coating and a short peptide layer, wherein the biocompatible endoprosthesis material comprises a basal body; a material of the basal body is degradable in a tissue body; the basal body is tubular, and has tubular inner and outer surfaces, and the inner surface forms a channel for allowing a tissue fluid, for example, blood, to pass through; the micro slot is positioned in the outer surface, the depth of the micro slot is smaller than the thickness of the tubular basal body, the micro slot can be a rectangular groove parallel to the axial direction of the basal body or an annular groove along the perimeter of the basal body or a W-shaped groove in the axial direction of the basal body; the composition capable of being degraded to release the Fe<3+> is loaded in a micro cavity, and can be degraded in the tissue to release the Fe<3+>; the degradable polymer coating coats on inner and outer surfaces of the basal body, and a degradation rate of the coating is higher than that of the basal body; the short peptide layer coats on the degradable polymer coating, and comprises a first short peptide and a second short peptide; the first short peptide and the second short peptide can be self-assembled to form hydrogel; and the hydrogel formed by self-assembling the short pepetide layer can be specially beneficial for climbing and covering of endothelial cells and regenerating of endodermis.
Owner:HUNAN PROVINCIAL PEOPLES HOSPITAL +1
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