9results about How to "Avoid joining" patented technology

This invention discloses a biological product extractor, belonging to the technical field of nucleic acid extraction equipment. The biological product extractor includes a support unit and a horizontally adjustable eccentric vibration module. The support unit includes, from top to bottom, an electromagnet disk, a temperature regulating element, and a first moving plate. The electromagnet disk is used to hold a type plate containing magnetic beads. The electromagnet disk is electrically connected to a control module to control its magnetic phase. The temperature regulating element is used to regulate the temperature of the type plate above the electromagnet disk. The output end of the horizontally adjustable eccentric vibration module is connected to the first moving plate to shake the type plate above the electromagnet disk. This invention combines the functions of a magnetic field module for regulating the aggregation and dispersion of magnetic beads, vibration and shaking, and temperature regulation. It avoids the addition and removal of biological products between multiple devices, reducing cross-contamination of biological products and improving the efficiency and quality of biological product preparation.

This invention relates to a silicon-carbon anode material for use in sulfide solid-state batteries, a modification method thereof, and a sulfide solid-state battery and its preparation method. The modification method includes: providing a porous silicon-carbon material, dispersing it in pure water or anhydrous ethanol to obtain solution A; adding a metal source to pure water, and adding oxalic acid or an alkaline solution dropwise while stirring until homogeneous to obtain solution B; transferring solution A to a water bath for stirring, and slowly adding solution B dropwise until the water evaporates, uniformly coating the surface of the silicon-carbon material with the precursor material to obtain the coated material; drying the coated material, and then heating and holding it under a nitrogen atmosphere to convert the surface metal oxide precursor into metal oxide, thus obtaining the silicon-carbon anode material. This invention avoids the addition of a solid electrolyte by constructing a lithium-ion transport layer in situ on the porous silicon-carbon material, thereby improving the initial discharge capacity and cycle stability of the battery, and achieving high capacity retention.

The invention discloses high-purity heat-resistant quartz ceramic and a preparation method and application thereof, and belongs to the technical field of inorganic non-metallic materials, the high-purity heat-resistant quartz ceramic comprises the following raw materials by mass fraction: 50-80% of a fused high-purity quartz raw material, 10-50% of fused high-purity quartz fine powder, 0.1-1% of a composite mineralizer, and 0.1-5% of a binder; the content of CaO in the high-purity heat-resistant quartz ceramic is less than or equal to 0.1%. The aspects of raw material deep processing, additives, the preparation process and the like are strictly controlled, the addition of calcium-containing substances is avoided, the eutectic point phase is fundamentally reduced, the alkali corrosion resistance and the high-temperature strength are further improved, and the finally obtained quartz ceramic has the advantages of high refractoriness under load, excellent thermal shock resistance and corrosion resistance, and the service life of the quartz ceramic is prolonged. The method is suitable for severe environments such as oxy-fuel combustion glass kilns.

The utility model relates to the technical field of magnet preparation molds, and discloses a multi-pole radial magnetic ring mold, which comprises a sleeve body, a plurality of radial magnetic rings and a plurality of radial magnetic rings, the multiple magnet structures are arranged on the outer side of the sleeve body, and the multiple magnet structures are distributed in the circumferential direction of the sleeve body at intervals; the shielding blocks are arranged on the outer side of the sleeve body, the number of the shielding blocks is equal to that of the magnet structures, and each shielding block is located between every two adjacent magnet structures. The magnet structures are arranged on the outer side of the sleeve body, the magnet structures generate an external orientation magnetic field, the magnet ring is oriented in the forming process of the magnet ring, the magnet structures are distributed in the circumferential direction of the sleeve body at intervals so that the magnet ring can be of a multi-pole radial structure, and one shielding block is arranged between every two adjacent magnet structures so that the trend of the magnetic field can be changed; the interference of a magnetic field on a concave mold cavity is reduced, so that the orientation force at the joint of two adjacent magnetic poles on the magnetic ring is reduced, the influence on a formed blank is reduced, and the phenomenon that the sintered magnetic ring cracks is reduced.

The invention provides nutritional thick soup containing dendrobium candidum and tremella aurantialba as well as a preparation method and application of the nutritional thick soup. The nutritional thick soup is prepared from the following raw materials in parts by mass: 1-35 parts of fresh dendrobium candidum, 5-50 parts of fresh tremella aurantialba, 1-12 parts of whole lotus seeds, 1-15 parts of poria cocos, 1-5 parts of liquorice, 1-10 parts of N-acetylneuraminic acid and 1-5 parts of erythritol. The nutritional soup containing dendrobium nobile and tremella aurantialba is prepared through the technological processes of selection, cleaning, soaking processing, boiling, mixing and sterilization. According to the invention, the raw materials are scientifically proportioned, so that the components can support and supplement each other, and the health-preserving and health-care effects of homology of medicine and food are achieved; the retention rate of active ingredients is increased, and the nutritional and health-care effects can be improved; meanwhile, the in-vitro antioxidant activity is enhanced, the IC50 value is only 38.5 mu g / ml, the phagocytic index of macrophages is increased to 1.88, and oxidation resistance and immunity enhancement can be achieved; and the fresh tremella aurantialba is adopted, so that the tremella aurantialba has the advantage of low sugar.

The present application relates to the technical fields of epoxy resin synthesis, in particular to a phenolic epoxy resin, a preparation method and application thereof. The phenolic epoxy resin has the structure shown in the following formula I: Formula I; wherein, in the formula I, n represents a polymerization degree, and is 0.2-0.6; R1, R2 and R3 are each independently selected from H or C1-C 10 alkyl; and R4 is selected from H or a fused ring group. The preparation method of the phenolic epoxy resin adds a phenolic compound for molecular modification in a refining stage, increases the proportion of secondary hydroxyl groups in the epoxy resin, promotes the curing of the epoxy resin, effectively shortens the gel time of the epoxy resin, does not change the mechanical properties of the cured epoxy resin, avoids adding a small molecule accelerator in the epoxy resin compound, and therefore can effectively improve the electrical properties of the cured product.

The application belongs to the field of resin synthesis, and particularly relates to a synthesis method of polyvinyl butyral resin. The raw materials for preparing the PVB resin in the application include PVA, n-butyl aldehyde and glyoxal, and do not include emulsifiers and alkali metal inorganic salts. The PVB resin prepared by improving the feeding mode has excellent penetration resistance, the PVB film prepared from the PVB resin has low haze and high molecular weight, and is particularly suitable for application on automobile glass.

The application relates to a continuous solvent-free reaction synthesis method of cycloxazidone, and belongs to the technical field of organic synthesis. The method comprises the following steps: taking ethyl chloroformate and monocyane as raw materials to generate N-cyano ethyl carbamate; dimethyl sulfate is added to generate N-cyano-N-methyl ethyl carbamate; dimethylamine hydrochloride aqueous solution is added to generate ethyl N-methyl-N-(N', N'-dimethylformamidino) carbamate; cyclohexyl isocyanate is added to generate ethyl N-methyl-N-[(cyclohexyl carbamoyl) (dimethylamino) methylene] carbamate; and the ethyl N-methyl-N-[(cyclohexyl carbamoyl) (dimethylamino) methylene] carbamate is subjected to a cyclization reaction to generate cycloxazidone. The method avoids the large use of toxic and harmful solvents such as chloroform, and the wastewater after the reaction basically does not contain dimethylamine, and the COD and total nitrogen content are greatly reduced.

The invention discloses a subblock sparse decision feedback underwater acoustic communication equalization method based on a recursive least squares (RLS) algorithm, which comprises the following steps of: processing a passband signal received by a hydrophone to obtain a baseband symbol, then overlapping and partitioning the baseband symbol, pre-equalizing each subblock by using a subblock sparse decision feedback equalizer based on a sparse Bayesian algorithm, and carrying out subblock sparse decision feedback equalization on each subblock by using a subblock sparse decision feedback equalizer based on a sparse Bayesian algorithm; outputting the pre-equalized data block z; discarding overlapped parts of the overlapped sub-blocks to eliminate interference among the blocks, performing adaptive equalization based on a recursive least square decision feedback equalization algorithm on the remaining effective parts, and outputting data symbols after equalization processing; and performing intra-block iteration on the current sub-block, and then balancing the next sub-block until the balancing of the whole data packet is completed. According to the invention, the reliability of underwater acoustic communication is improved, the balanced output signal-to-noise ratio is improved, and the bit error rate is reduced.