229results about How to "Strong expansion ability" patented technology

The present invention discloses a fruit and vegetable probiotic tablet and a preparation method thereof. The fruit and vegetable probiotic tablet uses probiotic powders such as lactobacillus plantarum powder as the main raw material, and the preparation method scientifically mixes modified dietary fibers, fruit and vegetable powder, oligosaccharides, plant extracts, protein powder, tea leaf extracts and traditional Chinese medicine extracts and etc., thus improves the content of soluble celluloses which are of real significance for probiotic flora, enhances the physiological activity of celluloses, thereby increases the species of intestinal probiotic flora as well as significantly enhances the colonization ability and time of endogenous and exogenous probiotics in the human intestinal tracts, effectively inhibits the growth and reproduction of harmful intestinal bacteria, especially gram-negative bacteria, and fully regulates the composition of the intestinal probiotic flora. The prepared fruit and vegetable probiotic tablet has a high biological activity, a long human intestinal colonization time, and a significant weight loss effect, and is suitable for a wide range of people.

The invention discloses a medlar and red date enzyme and a preparation method thereof, which belong to the technical field of enzyme preparation. Multi-strain composite fungi powder is adopted as a leavening agent; the medlar and the red date are adopted as main raw materials; dietary fiber, pectin hydrolyzate, seasoner extracting liquor, Chinese herbal medicine extracting liquor, enzyme stabilizer and other multifunctional auxiliary raw materials are scientifically compounded and modified; low-temperature processing technology such as ultrasonic cleaning, cryogenic grinding, microwave-assisted high-voltage pulse electric field processing and ultrasonic ripening are mainly adopted in the whole process, so that the natural colors, the flavor, the taste and the content of the active materials of the medlar and the red date are maintained furthest, the biological stability, the non-biological stability and the biological activity of the medlar and red date enzyme are obviously enhanced, the introduction of chemical addition agent is reduced, and the juicing rate of the medlar and the red date as well as the food safety of the enzyme are improved. Finally, the medlar and red date enzyme with high biological activity, strong stability, strong taste, flavor and appetite, long expiration date and edible safety is prepared.

The invention discloses porous phosphorus removing ceramic granules with a function of slowly releasing an alkali and a preparation method thereof. The prepared ceramic granules are an environmental material for efficiently removing phosphorus from municipal sewage and industrial wastewater. Based on the basic chemical properties of the phosphorus in water and a phosphorus removing mechanism by chemical absorption, the preparation method of the ceramic granules comprises the following steps of: mixing 20 to 40 mass percent of ordinary portland cement (42.5 level), 10 to 20 mass percent of bentonite, 10 to 20 mass percent of fly ash, 10 to 15 mass percent of calcium oxide, 15 to 25 mass percent of nitrocellulose, 14 to 30 mass percent of xonotlite fiber particle and 0.1 to 0.5 mass percent of pore-creating agent; adding water for stirring the mixture according to a water-solid ratio of 0.35 to 0.45; granulating the mixture into granules with required grain sizes; and after the granules are foamed and solidified, curing the granules by using high-temperature steam to obtain the ceramic granules. The method has the advantages of simple preparation process, readily available raw materials, low cost and wide application prospect in the field of the removing of the phosphorus in water bodies. The prepared ceramic granules have the characteristics of capacity of slowly releasing the alkalis, silicic and calcareous textures, porosity, capacity of continuously and efficiently absorbing and removing the phosphorus and suitability for phosphorus removing systems of the municipal sewage and the industrial wastewater.

The invention relates to a triazine series oligomer and the compound method. The method has the following steps: adding solvent into cyanuric chloride, dropping alkylol amine and acid roping agent to gain substitute of cyanuric chloride; heating, dropping diamidogen and acid roping agent to gain the substitute of cyanuric chloride; adding diamidogen and acid roping agent into reaction solution, heating, pumping, washing, and drying to gain triazine series oligomer. The invention has strong charring and expanding ability, and good thermal stability. It has advantages of continuously reaction process, short reaction time, simple compounding technology, little organic solvent, and easy to recycle organic solvent.

The invention discloses a nutritional health food with the function of improving gastrointestinal function and a preparation method thereof. The nutritional health food can be used for regulating the intestinal flora to improve the gastrointestinal function from the aspects of increasing the probiotics type and quantity, increasing the probiotics nutrient substance, inhibiting the growth of harmful bacteria and enhancing the immunity of human body. According to the preparation method, probiotics powder such as lactobacillus plantarum is used as the main raw material, and edible fungi extracts and modified dietary fibers are scientifically compounded; saussurea involucrata culture extracts which are capable of remarkably enhancing the immunity of human body, resisting inflammatory and easing pain, and have the functions of oxidation resistance, radiation resistance and fatigue resistance are used, so that while the intestinal probiotics flora types is increased, the fix planting capacity of the endogenous probiotics and exogenous probiotics in the intestinal tracts of human body is remarkably enhanced, and fix planting time of the endogenous probiotics and exogenous probiotics in the intestinal tracts of human body is prolonged remarkably, the growth and reproduction of the harmful bacteria, particularly the Gram negative bacteria, in the intestinal tracts are effectively inhibited, the forming of the probiotic floras in the intestinal tracts is fully regulated and the nutritional health food which is good in probiotic property, capable of remarkably enhancing the immunity of human body and has the effect of improving the gastrointestinal function is prepared.

The invention discloses a liquorice vegetable drink for improving a gastrointestinal function and enhancing the immunity and a preparation method of the liquorice vegetable drink. Herb of liquorice is used as a main raw material; liquorice concentrated juice, an edible mushroom extract, wolfberry fruit concentrated juice, modified dietary fibers, a corn bee pollen extract, pectin hydrolyzate and the like are scientifically compounded; the raw materials are treated by adopting a modern low-temperature and biological extraction technology, so that the content of effective components of the raw materials is greatly increased; various functional components are organically mixed, so that the optimal synergistic effect is achieved; meanwhile, by adoption of methods for thermal hybrid concentration of unstable concentrated liquid, jointed removal of cold and heat, sterile filtration, and the like, the flavor of the liquorice vegetable drink is greatly enhanced, and the expiration date of a product is prolonged; the liquorice vegetable drink with the effects of improving the gastrointestinal function and enhancing the whole immunity of a human body is prepared.

The present invention discloses a watermelon juice probiotic fermented beverage and a preparation method thereof. The beverage preparation method uses watermelons as raw materials, scientifically blends prebiotic factors, does not add any essences and coloring matters, mainly uses low-temperature processing technology such as ultrasonic wave cleaning, high-pressure pulsed electric field treatment, biological enzymolysis, vacuum degassing, etc. in the whole process, replaces the existing heat sterilization and enzyme blunting technology, maintains the color and luster, flavor and mouth feel of the natural watermelon juice to a maximum degree, enhances the non-biological stability and biological stability of the watermelon juice, reduces the addition of chemical additives, increases the juice squeezing rate and food safety of the watermelon juice, and has a probiotic live bacteria content of 7 multiplied by 10^11 to 8 multiplied by 10^11 cfu / ml. The watermelon juice probiotic fermented beverage is environmentally friendly, can be processed into probiotic solid beverage and quantitatively packaged beverage which have natural taste, are nutritious and health-care, are convenient to drink, and have longer shelf lives, opens up a new way for watermelon deep processing and industrial development, and can achieve better economic and social benefits.

The invention discloses a health food capable of improving intestinal floras and a preparation method of the health food. The intestinal floras are adjusted on a plurality of aspects of increasing the probiotics variety and quantity, adding probiotic nutrient substances, inhibiting the harmful bacterial growth and increasing the human immunity, so that the gastrointestinal functions are improved. With probiotic powder such as lactobacillus plantarum as a main raw material, an edible mushroom extract is scientifically compounded, and dietary fibers are modified, so that the human immunity can be significantly improved; a saussurea involucrate culture extract has the efficacies of resisting inflammation, relieving pain, and resisting oxidation, radiation and fatigue; the variety of the intestinal beneficial bacteria floras is increased; the field planting capacity of endogenous and exogenous probiotics in human intestinal tracts is significantly enhanced and the field planting time of endogenous and exogenous probiotics in human intestinal tracts is significantly prolonged; the growth and the reproduction of intestinal harmful bacteria, especially gram negative bacteria, are effectively inhibited; the components of the intestinal beneficial bacteria floras are fully adjusted; and the health food which is high in probiotic property, and is capable of significantly improving the human immunity and improving the intestinal floras is prepared.

The invention discloses a feed for promoting the reproductive performance and used in the earlier stage of a peak laying period, belonging to the technical field of feed composition. Plant extracts, corn bee pollen extract, Chinese herb extracts, modified dietary fiber, prebiotics factors and the like are scientifically compounded in the laying hen feed used in the earlier stage of a peak laying period and thus the feed for promoting the reproductive performance is prepared; through feeding experiment, the feed disclosed by the invention and the commercially available feed used in the peak laying period respectively have the following beneficial effects: the length of the fallopian tube of the laying hen is 6.82cm and 4.62cm respectively, the weight of the fallopian tube is improved by 11.49g and 7.46g respectively, the weight of ovary is improved by 6.08g and 4.17g respectively, the laying rate is improved by 2.07% and 2.15% respectively, the egg yield is improved by 2.73g and 1.92g respectively, the shank length is 7mm and 5mm respectively, the weight is improved by 0.07kg and 0.05kg respectively and the survival rate is improved by 2.4% and 3.2% respectively; the laying hen has strong reproductive performance, strong production performance, strong immunity resistance and disease resistance.

The invention discloses a probiotic-containing health food and a preparation method thereof, wherein intestinal florae are adjusted in many aspects of increasing the types and quantity of probiotics, increasing the nutrient substances of the probiotics, inhibiting the growth of harmful fungi, enhancing human immunity and the like, so as to improve gastrointestinal functions. Probiotic powders of lactobacillus plantarum and the like are taken as main raw materials, and edible fungi extract, modified dietary fibres, a saussurea involucrata culture extract capable of remarkably enhancing the human immunity, resisting inflammation and easing pain and having anti-oxidization, anti-radiation, anti-fatigue functions and the like are scientifically compounded, and then the planting capacity and the planting time of endogenous and exogenous probiotics in human intestinal tracts are remarkably improved and prolonged, the growth and reproduction of intestinal harmful fungi, especially, Gram-negative bacterium, are effectively inhibited, and the composition of intestinal probiotic florae is adequately regulated while the types of the intestinal probiotic florae are increased; therefore, a health food with high probiotic property, capable of remarkably enhancing human immunity and containing probiotics is prepared.

The invention discloses weight-losing probiotic tablets and a preparation method thereof. According to the weight-losing probiotic tablets and the preparation method thereof, probiotic powder such as lactobacillus plantarum is taken as a main raw material, and modified dietary fibres, fruit and vegetable powder, oligosaccharides, plant extract, protein powder, tea leaf extract, Chinese herb extracts and the like are scientifically compounded, thus increasing the content of soluble celluloses with real significance in probiotic groups, and enhancing the physiological activity of the celluloses, and then remarkably improving the planting capacity and the planting time of endogenous and exogenous probiotics in human intestinal tracts, effectively suppressing the growth and the reproduction of intestinal harmful bacteria, in particular, Gram negative bacteria, and adequately regulating the composition of the intestinal probiotic groups while increasing the types of the intestinal probiotic groups; the prepared weight-losing probiotic tablets are high in bioactivity, long in planting time in the human intestinal tracts, remarkable in weight-losing effect, and wide in the range of appropriate crowds.

The invention discloses a preparation method of NK (Natural Killer) cells. The preparation of the NK cells is prepared through the steps of coating a culture bottle, collecting peripheral blood, separating mononuclear cells, inoculating, amplifying and harvesting the cells. A serum free culture medium provided by the invention has clear components and high safety; after the mononuclear cells are cultured and activated by the culture medium, the amplification capability is strong; after being cultured for 15 to 18 days, the mononuclear cells are amplified for 160 to 200 times; after the cells are detected by a flow cytometer, the content of the NK cells of CD3<->CD56<+> is 65 to 70 percent and the content of T cells of an NK sample of CD3<+>CD56<+> is 5 to 15 percent; the content of NK andNKT cells exceeds 75 percent and the killing activity on K526 reaches 85 percent or above when the multiplicity of infection is 20 to 1; furthermore, an amplification method is simple and efficient and large-scale production is facilitated.

The invention provides a nutrient restoration agent of organic activity desertification soil. The nutrient restoration agent of the organic activity desertification soil is a solid module restoration agent or a liquid coating restoration agent. The invention further provides a preparation method of the nutrient restoration agent of the organic activity desertification soil. The nutrient restoration agent of the organic activity desertification soil has the advantages of being good in the effect of soil layer fixation, good in water retention, and capable of being different in raw material ratios according to different regions, desertification degrees and afforestation kinds so that a best restoration effect is achieved.

The invention discloses a preparation method of bean dreg dietary fiber. The preparation method of the bean dreg dietary fiber comprises the following steps of carrying out pretreatment, preparing semi-finished products, carrying out purification, and carrying out post-treatment. The invention further discloses bean dreg dietary fiber prepared according to the preparation method of the bean dreg dietary fiber. According to the preparation method of the bean dreg dietary fiber, a combination of a high-temperature steaming treatment, a steam explosion treatment and an ultrasonic treatment is adopted when pretreatment is performed on raw materials so as to effectively destroy structural organizations of the raw materials, and thus, inclusions in the raw materials are fully exposed; moreover,impurity removing treatment is combined so as to further reduce non-dietary-fiber components in the raw materials. The pretreated raw materials are beneficial for enhancement of enzymatic hydrolysis effects of cellulase or compound enzymes of cellulase and hemicellulase so as to ensure more sufficient enzymatic hydrolysis, and thus, purity of final products is improved; moreover, palatability of the final products can be also effectively improved. In addition, purification is further carried out after the enzymatic hydrolysis so that the purity is further increased, and thus, the final products have the advantage of high purity. The bean dreg dietary fiber disclosed by the invention further has the advantages of small fiber particle size, strong water holding capacity, and high in expansive capacity.

The invention discloses a desertification soil improver as well as a preparation method and application thereof. The desertification soil improver disclosed by the invention is prepared from the following substances in parts by weight: 20-40 parts of bentonite, 50-70 parts of straw, 0.5-1.5 parts of urea, 0.2 part of a microbial agent and 8-9 parts of a vitamin B6 solution. On the basis that the straw and the bentonite are adopted as main raw materials, the vitamin B6, the urea and the microbial agent are compounded and processed into the granulized soil improver, granular structures of desertification soil are increased, soil can be fertilized, the water and fertilizer retention capability of the soil can be improved, in addition, plant growth can be promoted, vegetational cover of the desertification soil is improved, convenience can be brought to production and transportation, and effects of efficient utilization of agricultural wastes and desertification soil improvement and treatment can be achieved.

The invention discloses an edible grain, bean and potato coarse cereal rice composition and a preparing method thereof and belongs to the technical field of grain deep processing. According to the edible grain, bean and potato coarse cereal rice composition, broken rice is used as a main raw material, after ultrasonic cleaning, microwave curing, drying and sterilizing of the broken rice, the broken rice, grain powder with a special flavor, enzymatic hydrolysate and other functional raw materials are pelletized, and then grain arrangement and processing through a microwave drying device are carried out, so that the edible grain, bean and potato coarse cereal rice composition is obtained. The edible grain, bean and potato coarse cereal rice composition has a tissue structure, granularity, hardness and viscosity which are similar to those of rice, can be boiled and cooked with rice, has the taste and chewiness, which are similar to those of cooked rice, is unique in flavor, soft in fragrance, high in appetite attractiveness, easy to digest and comprehensive in nutrition, and can improve the immunity and disease resistance of the human bodies and improve the gastrointestinal function. The guarantee period is three times of that of commercial rice. More importantly, a shortcut is developed for the efficient value-added comprehensive utilization of the broken rice, the road for the deep processing of the broken rice is broadened, and the economical value of the broken rice is increased. Better social benefits and economic benefits are realized and a sustainable development road for the deep processing of agricultural byproducts and the effective solving of Three-Rural problems is explored.

The invention discloses a polymerization type phosphorus-containing flame retardant as well as a preparation method and application thereof as an epoxy resin flame retardant, relates to a hydrolysis-resisting phosphorus-containing flame retardant and a preparation method thereof, and solves the problems that a conventional phosphorus-containing flame retardant is low in thermal stability, easy to hydrolyte and hard to process. The structural formula of the phosphorus-containing flame retardant is as shown in the specification. The preparation method comprises the following steps: by taking phosphoric acid or sulfuric acid as a catalyst, adding a trisphosphine oxide solution or a tertphosphine oxide solution, a reaction solvent and an additive into a reaction container, adding a melamine or amine compound at the room temperature, adjusting the pH value, heating at a certain stirring speed, reacting at certain temperature, performing backflow reaction, cooling to be the room temperature, sequentially performing suction filtration, washing in water and drying, thereby obtaining white powder solid, that is, the polymerization type phosphorus-containing flame retardant. The polymerized type phosphorus-containing flame retardant can be used as the epoxy resin flame retardant which is added into epoxy resin.

The invention provides a konjak biscuit and a preparing method thereof. The konjak biscuit is prepared from, by weight, 10-20 parts of konjak powder, 16-26 parts of oat powder, 18-28 parts of corn starch, 8-18 parts of soyabean protein powder, 3-13 parts of milk powder, 15-25 parts of vegetable oil, 8-18 parts of oligomerization isomaltose, 4-14 parts of xylitol, 17-27 parts of eggs and 1-3 parts of swelling agent. The konjak biscuit contains abundant dietary fibers, the nutritive value is high, the mouthfeel is good, the konjak biscuit is low in sugar and oil, people have obvious satiety after eating the konjak biscuit, and the konjak biscuit has an antiobesity action; meanwhile, the preparing method is simple and easy to carry out.

The invention belongs to the field of medical biological materials and discloses a magnesium oxide for magnesium phosphate concrete, a preparation method of the magnesium oxide and a magnesium phosphate concrete. The magnesium phosphate concrete comprises phosphate, magnesium oxide, sugar and calcium salt, wherein the weight ratio of phosphate to magnesium oxide is (2.5-1):1; the magnesium oxide is the mixture of two magnesium oxides with different reactivities at different roasting temperatures; and the reactivity of the magnesium oxide roasted at higher temperature is lower than the reactivity of the magnesium oxide roasted at lower temperature. The preparation method comprises the following steps of: preparing two magnesium oxides with different reactivities at different roasting temperatures into the magnesium oxide mixture in different proportions according to a target solidifying time, and solving the solidifying time of the concrete obtained by the mixtures; drawing a solidifying time curve according to the ratio of solidifying time to mixture proportion, and searching for the mixture proportion corresponding to the solidifying time on the curve; and finally, preparing the magnesium oxide mixture from the two magnesium oxides at different roasting temperatures according to the ratio. The mechanical strength, the degradability and the biocompatibility of such a material are all improved.

The invention discloses a health food for resisting fatigue and improving gastrointestinal functions and a preparation method of the health food. Intestinal floras are adjusted on a plurality of aspects of increasing the probiotics variety and quantity, adding probiotic nutrient substances, inhibiting the harmful bacterial growth and increasing the human immunity, so that the gastrointestinal functions are improved. With probiotic powder such as lactobacillus plantarum as a main raw material, an edible mushroom extract is scientifically compounded, and dietary fibers are modified, so that the human immunity can be significantly improved; a saussurea involucrate culture extract has the efficacies of resisting inflammation, relieving pain, and resisting oxidation, radiation and fatigue; the variety of the intestinal beneficial bacteria floras is increased; the field planting capacity and the field planting time of endogenous and exogenous probiotics in human intestinal tracts are significantly enhanced; the growth and the reproduction of the intestinal harmful bacteria, especially gram negative bacteria, are effectively inhibited; the components of the intestinal beneficial bacteria flora are fully adjusted; and the health food which is high in probiotic property, and is capable of significantly improving the human immunity, resisting the fatigue and improving the gastrointestinal functions is prepared.

The invention relates to an oily sludge gel particle profile control agent and a preparation method thereof, and belongs to the technical field of profile control water plugging of oil fields. The oily sludge gel particle profile control agent is formed by mixing plant straw, oily sludge slurry, polymeric monomers, an initiating agent, a cross-linking agent and water. Specially treated plant straw is added to the oily sludge slurry to prepare an oily sludge profile control agent inner core wrapped with the plant straw, then chemosynthetic gel is filled with the inner core, and the plant straw strengthened gel particle profile control agent is obtained. The density and strength of the profile control agent are adjusted by adjusting the adding proportion of the plant straw, the density of the particle profile control agent is decreased, and meanwhile higher strength of the profile control agent can be guaranteed; water absorption can reach 4.8-9.5 times, the expanding time is 5-28 days, good expansion capacity and delayed expansion performance are achieved, and deep placement and effective plugging of an oil reservoir can be achieved.

The present invention relates to konjak dietary fiber healthcare biscuits and a preparation method thereof. The konjak dietary fiber healthcare biscuits are prepared by the following raw materials including, by mass, 30-50 parts of konjak powder, 20-30 parts of compound dietary fiber, 20-30 parts of whole wheat flour, 20-30 parts of purple sweet potato powder, 20-30 parts of vegetable oil, 5-8 parts of white granulated sugar, 3-5 parts of xylitol, 8-10 parts of egges, 10-15 parts of water, and 1-2 parts of leavening agent, wherein the compound dietary fiber is composed of apple dietary fiber, pawpaw dietary fiber and bamboo shoot dietary fiber with a weight ratio of 3:1:1. The konjak dietary fiber healthcare biscuits have comprehensive nutrition and have good healthcare effects.

The invention relates to the technical field of oil extraction of oil fields, in particular to a diversified carbon-dioxide flooding oil extraction method. By adjusting parameters including minimum mixed-phase pressure, injection ratio, injection pressure, injection speed and the like of liquid carbon dioxide and water and utilizing alternative injection and flooding of the carbon dioxide and the water to perform crude oil extraction, the oil extraction speed and the recovery efficiency are improved.

The invention relates to a serum-free medium of a human amniotic epithelial stem cell and a culture method thereof. The serum-free medium is formed by adding a human epidermal growth factor, human transferring, human insulin, sodium selenite, alanyl-L-glutamine dipeptide, alanine, asparaginate, aspartic acid, glutamic acid, glycine, proline and serine to a DMEM / F12 basic medium. The culture method comprises the steps of digesting 2.5g / L of trypsin for a human amniotic membrane, obtaining the human amniotic epithelial stem cell and filtering to prepare a single cell suspension; putting the human amniotic epithelial stem cell into a CO2 incubator of which the saturated humidity and the volume fraction are 5% at 37 DEG C through the serum-free medium under a serum-free condition and achieving growth and amplification of the amniotic epithelial stem cell through liquid exchange and subculture under the serum-free culture condition, the serum-free medium has the characteristics of stem cells, and is free of other animal sources, wide in source and free of ethical restriction.

The invention discloses a lotus root starch manufacturing technology based on complete utilization of lotus root. The technology comprises the following steps: washing fresh lotus roots, peeling, grinding, then soaking the lotus roots in a color fixing solution, adding pectase, cellulase and glucoamylase to carry out enzymatic hydrolysis, squeezing the mixed solution obtained after the enzymatic hydrolysis with a frame squeezer so as to obtain lotus root juice and lotus root dreg, carrying out vacuum condensation on the lotus root juice with a double-effect externally-heated vacuum evaporator so as to obtain lotus root condensed juice, adding lotus seed polysaccharide and lotus leaf flavones into the lotus root condensed juice, and freeze drying so as to obtain the lotus root juice powder; vacuum drying the lotus root dreg, then carrying out a superfine grinding process on the dried lotus root dreg so as to obtain the lotus root dreg powder; mixing the lotus root juice powder and the lotus root dreg powder, carrying out a microwave sterilization treatment on the mixed powder, and packing so as to obtain the lotus root starch. The technology utilizes composite enzyme to carry out enzymatic hydrolysis, improves the juice yield; individually processes the lotus root juice and the lotus root dreg, finally mixes the lotus root juice powder and the lotus root dreg powder, thus the original nutrients in lotus root can be maximally preserved, and the nutrient recovery rate is high.

The invention discloses a biological bacteria grounded resistance-reducing agent and a preparation method thereof. The biological bacteria grounded resistance-reducing agent comprises sillico aluminatemiberals and silicate bacterium. Mill tailing sand is added in another component of the biological bacteria grounded resistance-reducing agent. The preparation method of the biological bacteria grounded resistance-reducing agent comprises the steps of grinding bentonite and adding water doped with silicate bacterium and evenly stirring. The invention has the advantages of ensuring the conductivity of electrolyte in the bentonite and other functions and advantages of the invention, activating or improving conductive active components in the resistance-reducing agent and improving the resistance-reducing performance. The invention reduces the resistivity of soil around a grounded body and the contact resistance of the grounded system and protects the metal grounded body from being oxidized and corroded. The mill tailing sand is wastes of a mine. The resistance-reducing agent utilizes tailing sand, not only is environment-friendly, but also greatly reduces the self cost.

The invention relates to a leak stopping and wall protecting agent for a petroleum drilling fluid and a preparation method thereof. The agent comprises 20 to 80 wt% of dry vegetable silk, 30 to 40 wt% of plant fruit shell powder, 20 to 55 wt% of sawdust particles, and 5 to 15 wt% of a shale scattering inhibitor. The leak stopping and wall protecting agent of the invention, which allows different pervious beds in drilling and large area well wall crack to be stopped, has the advantages of low permeability after leak stopping, strong stability of the well wall, good caving, no pollution to oil gas layers, abundant raw materials, low production cost and the like, and is suitable for various drilling processes of the pervious beds.

The invention relates to a drug-loaded embolism microsphere with a developing function and a preparation method thereof, and belongs to the technical field of medical instruments. The preparation method of drug-loaded embolism microsphere with the developing function under X-rays comprises the following steps of step 1, preparing a reversed-phase suspension polymerization oil phase; step 2, preparing an aqueous phase of a reversed-phase suspension polymerization system; and 3, carrying out reverse suspension polymerization. The method has the advantages that iodide reacts with microsphere hostmolecules in the synthetic reaction process, a steric hindrance effect is avoided, the reaction is more sufficient, the iodine element is uniformly distributed in the microspheres, and a complete andclear development image is formed under X-ray fluoroscopy; the iodine-containing alcohol is used as an X-ray-impermeable substance, so that the safety risk caused by additional addition of an organicsolvent or addition of a toxic and difficult-to-remove organic solvent is avoided; the microspheres are high in hydrophilicity, good in expansion capacity and rapid in adsorption and drug loading capacity and high in drug loading capacity. The preparation method is simple and can be completed through one-time polymerization reaction, and grafting modification and then polymerization reaction arenot needed.

The invention belongs to the technical field of road engineering, and particularly relates to a road reflection crack welding material and a construction process thereof. The road reflection crack welding material is prepared by the following components in weight percentage: 80-85% of aggregate, 10-15% of high polymer material and 3-5% of additive; and road reflection cracks are repaired by such processes as detecting, sorting, cleaning, punching, welding and testing. The road reflection crack welding material uses the high polymer material as adhesive so as to be effectively combined with an asphalt surface layer and a base layer to form a whole, so that the cracks can be repaired and a structural damage problem generated from the cracks can be solved; and the construction is carried out under normal temperature without heating, and not affected by the season, air temperature and environment, so that the cracks can be repaired from bottom to top. The road reflection crack welding material has low production cost, a simple proportioning and construction process and extensive construction conditions, and is firm and wearable, and can be combined with the road surface to form the whole.

The invention discloses a construction method of a visual point cloud map. The method includes the steps of: carrying out feature extraction on an acquired source image frame of the space of the to-be-built map; obtaining a source image frame feature point; performing inter-frame tracking on the source image frame; determining key frames, matching the feature points in the current key frame with the feature points in the previous key frame; obtaining matching feature points of the current key frame, calculating spatial position information of the matching feature points in the current key frame, taking the spatial position information of the matching feature points as map point information of the current key frame, and taking point cloud formed by map point sets of all key frames as a first visual point cloud map. According to the method, mapping and positioning are separated in the map construction process, the mutual influence of mapping and positioning is effectively removed, and the method has better adaptability and stability in a complex and changeable environment.