152results about How to "Reduce weightlessness" patented technology

The invention discloses a sintered neodymium-iron-boron preparation method capable of improving intrinsic coercivity and anticorrosive performance. On the basis of a double-alloy preparation process, Ce-enriched multicomponent rare-based alloy with high amorphous forming ability is used as an auxiliary alloy, and the decrystallizatoin of crystal boundary phase structure is realized by gas quenching cooling in a sintering tempering process. In the invention, the intrinsic coercivity is obviously improved, the anticorrosive weight loss is greatly reduced, the magnetic performance and anticorrosive performance are high, and the method can be widely used in the field of production of high-performance anticorrosive sintered neodymium-iron-boron material.

The invention belongs to the technical field of agricultural biocontrol, and especially relates to a broad-spectrum disease resistance bacillus and an application thereof. The biocontrol bacillus is classified and named as Bacillus velezensis, and the preservation number is CGMCC. No.15766. The Bacillus velezensis has the advantages of broad antibacterial spectrum, strong antagonistic effect, longlasting period, and effectiveness in inhibition of the growth of crop pathogenic fungi, and can be used in the fields of agricultural biocontrol to prevent and control crop diseases caused by gray mold, blight, anthracnose, stem rot, seedling blight, stalk break, gibberellic disease and other fungi. The Bacillus velezensis can also be used for promoting the growth of crop seeds and seedlings andthe preservation and fresh-keeping of fruits and vegetables. The Bacillus velezensis has the characteristics of strong resistance to ultraviolet and drought, simple preparation method and low cost, isa biocontrol strain with excellent performance, and has good development and application prospects.

The present invention discloses one kind of fast frozen white delicious fish fillet of spotted forked-tail Leiocassis longirostris and its production process. The production process includes the steps of temporarily raising, killing to eliminate blood, slicing, eliminating skin, trimming, soaking to sterilize, loading into tray and quick freezing, grading, coating with ice, packing, etc. The production process features complete elimination of blood, low temperature of fish fillet in icy water at 0-4 deg.c, soaking fish fillet in ozone icy water and ultralow temperature quick freezing at below -35 deg.c. The production process has high fish fillet yield and less nutrient loss, and the produced fish fillet is white, translucent and delicious.

The invention discloses sow mating feed, and belongs to the technical field of pig raising feed. The sow mating feed is all-around in nutrition through scientific formulation, can meet needs of sows on various nutrients in a mating stage, promote metabolism, improve the immunity of a sow, reduce postpartum body weight loss of the lactating sow, promote rapid empathema of the sow to shorten the mating cycle, increase the number of piglets and the weight of a newborn piglet, increase the annual reproductive times and the reproductive performance of the sow; comparison tests show that the sow mating feed used in the mating period of the sow has a more significant effect than lactating sow feed, can improve the empathema rate, the litter size and the piglet birth weight of first-litter sows, can improve the empathema rate, the litter size and the piglet birth weight of multiparous sows and shorten the number of empathema days.

The invention relates to the technical field of ultrahigh temperature ceramic powder, in particular to polybasic solid solution rare earth silicate ceramic powder and a preparation method thereof. Thechemical formula of the polybasic solid solution rare earth silicate ceramic powder is (Y0.2Yb0.2Re'0.2Re'0.2La0.2)2Si2O7, wherein Re' and Re' are selected from any two of Nd, Ce, Sm, Er and Eu. Thepreparation method comprises the following steps: mixing raw materials by adopting a wet-mixing method, and drying; then placing the mixture in a high-temperature reaction furnace for reacting; performing wet milling and spray drying granulation to obtain the polybasic solid solution rare earth silicate ceramic powder. The polybasic solid solution rare earth silicate ceramic powder has high solidsolubility, excellent high temperature resistance, no decomposition at a high temperature and low thermal conductivity. The preparation method is simple and feasible.

The polythene bag fruit fresh keeping bag is made by adding ventilating mother granule into the polythene, blowing into barrel film, using smooth surface compressing the roller into 1mum-15mum micropore ventilating tubular film into film thickness 0.015mm-0.02mm, with micropore density of 500, 000-1, 000, 000 /m2, ventilating quantity of 15min-70min/(100mmX100mm.20g.1.013X105Pa) fresh keeping bag. It can exhaust Co2 and restraining O2, realizing air conciliation and moisture keeping. The air adjusting fresh keeping bag keeps freshness of food 7 days longer, freezing fresh keeping period longer than 1-2 months.

A low-cost N35 NdFeB magnet with high cerium content and a sintering method thereof belong to the technical field of powder metallurgy. The low-cost N35 NdFeB magnet is prepared from the following rawmaterials based on percent by weight according to a sintering process, 12-27% of praseodymium neodymium (Pr-Nd), 7-15% of cerium (Ce), 0-0.5% of niobium (Nb), 0-1% of aluminum (Al), 0-1% of copper (Cu), 0.9-1.1% of boron (B), 0-1.2% of cobalt (Co), 0-0.5% of zirconium (Zr) and 0-3% of gadolinium (Gd) with the balance being iron (Fe). In the scheme, a part of praseodymium neodymium (Pr-Nd) is substituted by cerium (Ce), the magnetic performance index reaches national standard of N35 mark sintering NdFeB, and the material cost can be reduced by 15-25 yuan during production of each kilogram of the corresponding mark magnet.

The invention discloses a high-temperature-resistant silicone rubber foam material and a preparation method thereof. The preparation method of the high-temperature-resistant silicone rubber foam material is characterized by comprising the following steps: mixing 100 parts of silicone rubber base stock, 20-35 parts of a reinforcing agent, 2-3 parts of a structure controlling agent, 0-0.2 part of colour master batch, 60-150 parts of a pore-forming agent and 4-5 parts of a radiation sensitizer, moulding, crosslinking through gamma ray radiation, forming pores through subsection dissolving-out, and drying, so that the silicone rubber foam material which is resistant to high temperature of 250 DEG C and still maintains excellent performance after equivalent time of 20000 hours can be obtained. The preparation method of the high-temperature-resistant silicone rubber foam material has the advantages that radiation crosslinking and dissolving-out pore forming are combined, so that crosslinking is uniform, control is easy, energy conservation and environmental protection are realized, a technology is concise, reproducibility is good, and production efficiency is high; the high-temperature-resistant silicone rubber foam material still maintains high tensile strength, high weight loss, low longitudinal deformation and low surface hardness after the equivalent time of 20000 hours at the temperature of 250 DEG C, permanent compressive deformation is slightly increased, the high-temperature-resistant silicone rubber foam material does not become brittle or hard, and the high-temperature-resistant silicone rubber foam material can serve as filling and positioning, sealing cushion, cable insulation as well as buffer and vibration-absorptive materials or parts which are used in high-temperature environment.

The invention relates to a preparation method of a high-temperature-resistant great-temperature-difference cement paste for oilfield well cementing. The high-temperature-resistant great-temperature-difference cement paste for oilfield well cementing is prepared from the following raw materials in parts by weight: 600 parts of Grade-G oil well cement, 30-36 parts of HS101L water-loss control agent, 8-20 parts of HS201L retarder, 1.8 parts of HS-301S dispersing agent, 150 parts of quartz sand, 30 parts of silicon micropowder, 1.8 parts of HS-XF1S suspension stabilizer, 280-300 parts of water and 1 part of sodium bis(2-ethylhexyl)sulfosuccinate. The particle size of the quartz sand is 80-120 meshes; and the particle size of the silicon micropowder is 300-400 meshes, and the silicon dioxide content is 90% or above. The preparation method comprises the following steps: adding liquid-phase raw materials into a paste mixing vessel, and uniformly mixing; and adding solid-phase substances into a solid-phase vessel, stirring uniformly, adding the solid-phase mixture into the paste mixing vessel, finally adding a defoaming agent, and stirring uniformly. The cement paste prepared by the method can be used under the condition of 50-180 DEG C, has outstanding resistance to great temperature difference, and can effectively avoid the phenomenon of super slow setting caused by great temperature difference.

The invention belongs to the technical field of fruit and vegetable fresh keeping and in particular relates to a physical honey peach storage method. The physical honey peach storage method mainly comprises the following steps: (1) selecting peaches and dissipating heat in a room at the temperature of 20 to 25 DEG C after the honey peaches are picked within 5 hours; (2) performing heat shock treatment on the selected honey peaches at the temperature of 53 to 55 DEG C for 8-12 minutes, and rapidly taking the honey peaches subjected to heat shock treatment out; (3) dissipating heat of the honey peaches subjected to the heat shock treatment in an indoor environment at the temperature of 20 to 25 DEG C; (4) performing unsealed package on the honey peaches by using polyamide film and polyethylene film composite bags; and (5) storing the packaged honey peaches in an air-conditioned cold store at the temperature of 8 to 10 DEG C, regulating the temperature of the air-conditioned cold store to be 2 to 4 DEG C after adapting to a low temperature, and continuously performing cold storage, wherein the volume rate of gas in the air-conditioned cold store is as follows: the N2 content is 86 percent, the O2 content is 4 percent and the CO2 content is10 percent, and the humidity is controlled to be 80-90 percent. The invention aims to provide the physical honey peach storage method which is convenient to operate, safe, high-efficiency, good in storage effect and long in storage time.

The invention relates to an antifungal protein separated and purified from bacillus subtilis J18, a protein product, a preparation method and an application. A strain serial number of the bacillus subtilis J18 is CGMCC No.3665, and a strain name is the bacillus substilis J18. The preparation method of the protein product comprises the following steps of: mixing the J18 antifungal protein with 1 percent of acetic acid to form a chitosan solution with a pH value of 6.0, compositing the chitosan solution to form a film coating reagent which has the concentration of 0.05mg/mL and is used for soaking a fruit, and also coating a mixture which is formed by mixing the J18 antifungal protein solution with an oxidized starch solution on a preservative paper to prepare an antifungal preservative paper used for wrapping the fruit. The antifungal protein has remarkable control effect to fruit and crop diseases and particularly black spot diseases of pears after picking and is an antagonistic strain with broad spectrum and high efficiency.

The invention is concerned with the preliminary treatment method for the low voltage anodic foil, includes the following steps: (1) processes the heating treatment to the low voltage foil that is not annealing in 300-600deg.Cfor 0.5-3 minutes; (2) processes the anodic foil at the temperature of 20-70deg.Cfor 30-90 seconds in the mixing liquor of 0.5-10wt% of the sodium hydroxide and 1-5wt% of the dodecyl benzene sulfonic acid sodium; (3) processes the anodic foil at the temperature of 20-70deg.Cfor 30-90 seconds in the mixing liquor of 1-10wt% of the hydrochloric acid; (4) processes the first level erosion, the middle processing, the second level erosion, and the post processing, in order to get the low voltage anodic foil that is small weightlessness, high specific volume, and better machinery intensity.

The invention relates to a colla corii asini sow feed belonging to the technical field of feed processing. When imported variety of pigs are raised, mutual inadaptation between a raiser and the raised pigs causes problems that the sow has low repeat service rate, high rate of abortion, low farrowing number of each birth, and low breeding rate of piglets. Therefore, the invention provides the colla corii asini sow feed which comprises corns, bean pulps, colla corii asini, yeasts, bean oil, calcium carbonate stone powder, calcium hydrophosphate, salt, lysine, baking soda, methionine, choline chloride, a sow feed supplement and bran. The repeat service rate of the sow is improved by 7.5%, the pregnancy time of the sow is increased by more than four times, additional one to two healthy pigs are born for each birth, abortion of the sow due to disease is reduced by 90.17%, the immunity of the sow and suckling pigs in sucking period is improved, and the rate of survival of the suckling pigs in sucking period is improved by 94.66%.

The invention discloses a permanent-magnet material resistant to high temperature and with high magnetic performance. The mass of the permanent-magnet material comprises 100 parts of Nd2Fe14B magnetic powder, 0.1-0.3 part of ferrocene magnetic powder, 0.1-5 parts of titanate coupling agent, 1-10 parts of bisphenol A epoxy resin and 0.2-3 parts of graphene oxide powder, and a cured material is formed after uniformly mixing the raw materials in a composite environment of a temperature field with a constant temperature being 20-200 DEG C and an orientation field with field magnetic intensity being 0.5-3T. With the permanent-magnet material provided by the invention, the defect of unfavorable temperature resistance of a bonded NdFeB material is improved, the application range of the bonded NdFeB material is expanded, the defect of low application temperature of the bonded NdFeB material can be made up, the magnetic performance of the magnet under high temperature is greatly improved, the weight loss of the magnet can be effectively reduced, and the corrosion resistance of the magnet is improved.