38results about How to "Retain good properties" patented technology

The invention discloses a method for preparing spheroidal graphene, and a technical problem to be solved is to increase the density of graphene and make the transportation and storage convenient. The method comprises the following steps: dispersing graphene in water or alcohol, carrying out ultrasonic processing or ball milling, and carrying out granulation and drying to obtain the spheroidal graphene; or dispersing graphene in water with stirring, carrying out decentralized processing, and carrying out granulation and drying to obtain the spheroidal graphene. Compared with the prior art, by high temperature granulation or low temperature refrigeration granulation processing, the obtained graphene has uniform structure, small volume, large density, good electrical conductivity, and convenience in transportation, and can be applied in catalyst carrier, drug delivery, lithium ion battery and super capacitor as a carbosphere; by ultrasonic processing, the spheroidal graphene is dispersedinto graphene monomers with less than 10 layers, and the excellent properties of the graphene are kept, the obtained spheroidal graphene can be convenient for being applied in various fields, the safety performance is high, the continuous preparation production can be realized, the processing capacity can be controllable and adjustable, and the invention is suitable for large scale production.

The invention discloses a back-hydrofoil high-speed wing rowboat, which comprises a boat body and a motive power device, wherein the bottom of the back end of the boat body is in an integral step lifting in a step shape, the bottom linetype of a front boat body is backwards and gradually transited to the shallow V-shaped transverse cross section from the V-shaped transverse cross section of a boat bow part, and then, the bottom linetype of a back boat body is in a horizontal or shallow reverse V-shaped or shallow reverse circular arc-shaped transverse cross section until the bottom linetype of the bow part of the back boat body is in a horizontal or shallow V-shaped transverse cross section. A back hydrofoil is arranged under the bottom of the back boat body, and two pairs of sheet bodies with tapered wing-shaped transverse cross section in horizontal staggered and transverse symmetry in the longitudinal direction respectively and obliquely extend from two sides of the front boat body. The back-hydrofoil high-speed wing rowboat has the advantages that the splashing kinetic energy of the sliding surface fluid can be better absorbed, and the comprehensive performance of the rowboat is better than that of a planing boat and a gliding-hydrofoil boat. The rapidity of the rowboat is improved by more than 10 percent than that of the planing boat, meanwhile, the transverse and longitudinal stability of the rowboat is greatly improved than that of the planing boat and the ordinary gliding-hydrofoil, and in addition, good character that the planing boat can surf the beach is reserved.

The invention discloses a rapid reproduction method for apple rootstocks T337. The method is used for rapidly reproducing the apple rootstocks T337 by virtue of primary culturing with a culture medium consisting of MS, 0.5mg / L of 6-BA, 0.1 milligram of IBA and 500mg / L of PVP, secondary culturing with MS (0.75mg / L of NH<4+> and 2.2mg / L of K<+>), 0.6mg / L of 6-BA and 0.5mg / L of IBA, rooting culturing with a rooting culture medium comprising 1 / 2MS and 0.9mg / L of IBA and acclimatization and transplantation with pure sawdust. According to the method, high survival rate is ensured, high properties of the rootstocks are also preserved, and a convenient method and convenient means are provided for the development and further expansion of the apple industry.

The invention relates to reinforcing liquid for paper cultural relic protection. The reinforcing liquid for the paper cultural relic protection is prepared from the following raw materials by weight percent: 30% to 75% of hexamethylene diisocyanate trimer, 0.5% to 4% of nano silica, 0.1% to 0.3% of dibutyltin dilaurate and 20.7% to 68.9% of N,N-dimethylformamide, the nano silica is dried to obtaindried nano silica; the hexamethylene diisocyanate trimer is added into the N,N-dimethylformamide, dissolved, and kept warm for 5 to 10 minutes to obtain a mixed solution; the dried nano silica is added into the mixed solution, and the dibutyltin dilaurate is added and heated to 70 DEG C. When an isocyanate group content is up to 15% to 50%, the reinforcing liquid of the invention is obtained; thereinforcing liquid for the paper cultural relic protection is scientific and reasonable in composition, rich in raw materials, easy to produce and prepare, and good in use effect. The reinforcing liquid for the paper cultural relic protection is innovation of the reinforcing liquid for the paper cultural relic protection, and has enormous economic and social benefits.

The invention discloses a breeding method for reducing the cadmium content of rice grains. CRISPER / Cas9 technology is used to knock out the rice OsNCX8 gene in a targeted manner to obtain transgenic plants knocked out of the OsNCX8 gene, from which a homozygous plant with complete inactivation of the OsNCX8 protein is selected to finally obtain Plants without genetically modified ingredients and reduced cadmium content in rice. The OsNCX8 protein is the first member of the sodium-calcium exchange protein family identified in rice, and the inactivation of the OsNCX8 protein leads to a reduction of about 45% in grain cadmium content. Moreover, the agronomic traits of plants with OsNCX8 protein inactivation were not significantly changed compared with normal plants. at T 0 Homozygous plants with complete inactivation of the OsNCX8 protein can be obtained from the offspring plants, which greatly shortens the breeding time, and plants without transgenic components can be screened from their offspring, avoiding the safety hazards caused by transgenes.