4results about How to "Effective cracking" patented technology

The application provides a method for improving the yield of oxygen-containing compounds in low-rank coal-derived soluble matters, and belongs to the technical field of low-rank coal pretreatment, and comprises the following steps: first, performing ozone oxidation pretreatment on low-rank coal to obtain modified low-rank coal; using cobalt acetate, copper acetate and iron acetylacetonate as a cobalt source, a copper source and an iron source respectively, using hydrazine hydrate as a strong reducing agent, and using a one-pot hydrothermal method to obtain magnetic Co-CuFe2O4 nanospheres; and using the prepared Co-CuFe2O4 nanosphere catalyst to perform catalytic ethanolysis reaction on the low-rank coal subjected to ozone oxidation pretreatment. In the application, appropriate ozone oxidation pretreatment can effectively improve the activity of the low-rank coal, and when the magnetic Co-CuFe2O4 nanospheres are applied to catalytic ethanolysis reaction of the low-rank coal subjected to ozone oxidation pretreatment and catalytic ethanolysis reaction of low-rank coal-related model compounds, the magnetic Co-CuFe2O4 nanospheres all exhibit excellent catalytic activity, higher-yield soluble components can be obtained, the yield of oxygen-containing compounds in the derived soluble matters is improved, and efficient and high-value utilization of the low-rank coal is realized.

The utility model provides a silica gel repair mortar composite material layer which comprises a composite material layer body, and the composite material layer body comprises a mortar layer, a first connecting keel layer, a second connecting keel layer, a first silica gel layer, a second silica gel layer, a first waterproof layer, a second waterproof layer, a first outer decoration layer and a second outer decoration layer. The first connecting keel layer is arranged between the mortar layer and the first silica gel layer, and the second connecting keel layer is arranged between the mortar layer and the second silica gel layer, so that the bonding area between the mortar layer and the first silica gel layer and the bonding area between the mortar layer and the second silica gel layer are enlarged, and the connecting strength between the mortar layer and the first silica gel layer and the connecting strength between the mortar layer and the second silica gel layer are improved; and the effective structural layer cracks.

The invention discloses a pH-sensitive liposome for entrapment of a cell culture additive and a preparation method of the pH-sensitive liposome, and relates to the technical field of pH-sensitive liposomes. According to the invention, nutrient substances such as glucose, amino acid and glutamine and pH regulators such as NaOH and NaHCO3 required in the middle and later periods of cell growth are prepared into pH-sensitive lipidosome, the substances are respectively wrapped in cavities of the lipidosome, and after the pH of a cell growth solution system is reduced, the substances can be respectively released to be beneficial to improving the growth state of cells, improving the cell growth state and improving the cell growth efficiency. The pH balance of the cell growth liquid can be realized, and the cell growth liquid is kept neutral. The prepared pH sensitive liposome is uniform in size, good in dispersity, stable in structure in a neutral solution and capable of being effectively split in an acid solution, and the growth state of cells can be improved after the pH sensitive liposome is loaded with nutrient substances and a pH regulator. The pH-sensitive lipidosome can be added with substances required by cell culture in a manner of not opening a cell culture container, so that the risk of cell pollution is reduced.

The invention discloses a nucleic acid extraction device and method, and relates to the technical field of nucleic acid extraction device.The nucleic acid extraction device comprises a nucleic acid storage table, an isolation hood is fixedly connected to the middle of the upper surface of the nucleic acid storage table, and a preheating dispersion barrel is arranged on the circumference of the upper surface of the nucleic acid storage table; a nucleic acid detection rod is arranged at the upper end of the multifunctional sampling tube; the device further comprises a uniform dispersion preheating adjusting mechanism and an auxiliary sampling mechanism; by arranging the uniform dispersion preheating adjusting mechanism, shaking control over the interior of the specimen can be achieved, by arranging the cambered surface of the bevel convex angle block, the rotating disc can push the preheating dispersion barrel to slide in the isolation hood in a reciprocating mode, and by controlling the rotating speed of the motor, the reciprocating sliding frequency of the preheating dispersion barrel in the isolation hood can be directly controlled; according to the method, sample damage caused by too large physical force generated in the shaking process can be reduced, especially for fragile cells or tissue structures, so that the integrity and extraction efficiency of nucleic acid extraction can be improved.