21results about How to "Keep for a long time" patented technology

The invention relates to a preparation method of peppermint essence, which solves the problems of quick volatilization and poor durability of the traditional peppermint essence by optimizing the combination of essence components and a slow-release carrier by adopting a multi-layer microcapsule slow-release technology and a nanocapsule technology. According to the method, essence components such as menthol, menthone and leaf isovalerate are mixed with at least two layers of microcapsules, the outer layer microcapsules slowly release fragrance, the inner layer microcapsules quickly release fragrance, and it is ensured that the fragrance is kept for a long time in the using process. Meanwhile, the essence is uniformly dispersed in different carrier systems through ultrasonic-assisted emulsification by adopting a nanocapsule technology, so that the stability and dispersity of the essence are improved. In addition, the temperature-responsive and pH-responsive polymer materials are introduced, so that the release rate of the essence can be adjusted according to the external environment, and the adaptability of the essence is further enhanced.

A support structural member and a display device are provided by the present application. The support structural member includes: a support frame, having a screen body support surface, in which the support frame includes a first sliding support member and a second sliding support member arranged opposite to each other, and the first sliding support member and the second sliding support member are movably connected in a first direction; a driving portion, including a first driving mechanism, in which the first driving mechanism is configured to drive the first sliding support member and the second sliding support member to move relatively to each other in the first direction to drive the first sliding support member and the second sliding support member approach to or far away from each other. The present application can increase the stretching- and-shrinking speed of the support frame, and further can increase the unfolding speed and the storage speed of the display device.

The application relates to the technical field of heat exchange, and discloses a column-tube type heat exchanger for fluid heat exchange, which comprises a shell, the inside of the shell is uniformly distributed with inner mounting plates, the outside of the inner mounting plates is rotationally connected with outer mounting plates, the inside of the shell is provided with two inner end plates, the outside of the inner end plates is rotationally connected with outer end plates, the outside of one side of the outer end plates is fixedly connected with a ratchet wheel, the inside of the other side of the outer end plates is rotationally connected with a fixing frame, the upper end of a driving bin two is slidably connected with a sliding shaft, and the upper end of the sliding shaft is fixedly connected with a limiting block. Through the relative rotation of the outer mounting plates and the inner mounting plates, the window area and the flow position of the clear water flow channel formed between the outer mounting plates and the inner mounting plates continuously and dynamically change, the clear water in the shell is forced to continuously change the flow direction, the clear water is prevented from long-term flowing through the local heat exchange area along the fixed flow channel, the outer surfaces of all the heat exchange tubes can be fully contacted with the low-temperature clear water, and balanced and deep heat exchange of the whole tube area is realized.

[PROBLEM] To provide a conjugate of an antibody and a functional substance or a salt thereof excellent in desired properties while controlling a binding ratio between the antibody and the functional substance within a desired range. [MEANS FOR SOLVING PROBLEM] A conjugate of an antibody and a functional substance or a salt thereof, which comprises a structural unit represented by the following formula (I): wherein Ig represents an immunoglobulin unit comprising two heavy chains and two light chains, and regioselectively forms an amide bond with a carbonyl group adjacent to Ig via an amino group in side chains of lysine residues in the two heavy chains, L1 and L2 each represent a divalent group, R1 represents a monovalent group optionally comprising a hydrophilic group, X represents a predetermined divalent group, D represents a functional substance, RA represents a side chain of a valine residue, RB represents a side chain of a citrulline residue or an alanine residue, n is 0 or 1, and an average ratio r of the amide bonds per two heavy chains is 1.5 to 2.5, and wherein at least one hydrophilic group is present in the structural unit.

The embodiment of the application discloses an asynchronous clock domain data read-write method and a first-in-first-out cache system, relates to the technical field of integrated circuits, and is invented to reduce the read-write data delay between asynchronous clock domains. The method comprises the following steps: writing to-be-written data into a write address; using the rising edge and the falling edge of a write clock of a write clock domain to sample the write address respectively, so as to obtain a rising edge address corresponding to the rising edge of the write clock and a falling edge address corresponding to the falling edge of the write clock; determining a to-be-synchronized address according to a predicted phase value, the rising edge address and the falling edge address; the predicted phase value is determined according to the phase difference between the write clock and a read clock in the mth write clock period; taking the to-be-synchronized address as the input of a first flip-flop, sampling the to-be-synchronized address through the read clock, and obtaining a synchronized address synchronized to the read clock domain; and reading the data in the first-in-first-out memory based on the synchronized address. The application is suitable for transmitting data.

The invention relates to a method for the depolymerization of a terephthalate polyester, for example a PET polymer. The method comprises the steps of: a) contacting a terephthalate polyester with methanol and dimethyl terephthalate, DMT; and b) heating the mixture of the terephthalate polyester, methanol and DMT in the presence of a catalyst suitable for catalyzing the depolymerization of the terephthalate polyester.

By changing the traditional carrying method and backpack straps, the deltoid muscles of the shoulders are used as the load-bearing points of the backpack. Through the combination of shoulder pads (1), shoulder pad air cushions (2), three-way backpack straps (3) and other accessories, the vertical load-bearing mode of the trapezius muscles of the shoulders is changed to the three-way load-bearing mode of the deltoid muscles of the arms. Three key innovative technologies are used to avoid the trapezius muscles, which are prone to fatigue when under load, and to transfer the weight of the backpack to the deltoid muscles of the shoulders, forming a three-way load distribution carrying system on the shoulders and chest. This makes the trapezius muscles of the shoulders no longer feel sore when carrying heavy objects, allowing us to carry heavy items for a long time. When carrying more items and outdoor equipment such as tents during outdoor rescue, field research, hiking, etc., it feels easier, the carrying time is longer, and more items can be carried.

The present invention relates to a method for preparing nano ZrO2 / HfO2 and metal nanoparticles. Firstly, an initial alloy mainly composed of Zr / Hf and Al / Zn is prepared using metal raw materials; Dissolve the initial alloy in a hot alkaline solution to obtain an intermediate solution; Then reduce the alkaline concentration or (and) temperature of the intermediate solution to allow the solid flocculent products containing Zr / Hf to precipitate from the intermediate solution after the concentration or (and) temperature is reduced, resulting in low crystalline nano ZrO2 / HfO2; By further heat treatment, crystalline nano ZrO2 / HfO2 was obtained. When precious metal elements are dissolved in the initial alloy, this method can also be used to prepare metal nanoparticle doped nano ZrO2 / HfO2; After removing the nano ZrO2 / HfO2 from the composite product, metal nanoparticles were further prepared.

The present disclosure provides a negative electrode plate, a preparation method and application thereof. A negative electrode active material of the negative electrode plate includes a first amorphous carbon material. An interlayer spacing (d002) of the first amorphous carbon material is greater than 0.34 nm, and an average pore diameter of pores of the first amorphous carbon material ranges from 2 nm to 20 nm. The negative electrode plate can help improve energy density of a lithium-ion battery and suppress expansion of an electrochemical energy storage apparatus during cycling.

The utility model provides a vegetable weeder, belongs to weeder equipment technical field, the vegetable weeder includes shell, motor, shaft and weeding blade group, the shell is used for placing motor, shaft and weeding blade group, the motor is placed on the inside one side of shell, the output shaft is fixed connection with shaft, the inside of shaft is hollow structure, and the shaft is equipped with the weeding blade group. The side wall is fixedly connected with the weeding blade group, the weeding blade group is used for removing weeds, and a plurality of water outlet holes are formed in the center of the weeding blade group on the side wall of the rotating shaft and used for removing soil impurities adhered to the weeding blade group; one side of the rotating shaft is fixedly connected with the motor, the other side of the rotating shaft is rotationally connected with the water inlet, and the rotating shaft is rotationally connected with the water inlet through a rotating joint; the vegetable weeding machine blade can solve the problem that the blade is not easy to clean after being used, and is convenient to clean.

The application discloses a cholesteric liquid crystal display circuit, a driving method thereof and electronic paper, and relates to the technical field of cholesteric liquid crystal display. The voltage time sequence of the gate drive circuit, the source drive circuit and the common electrode end is set. In different time periods, when the corresponding pixel is in a liquid crystal torsion state, the gate-source voltage of the switching transistor is the same; when the corresponding pixel is in a liquid crystal non-torsion state, the gate-source voltage of the switching transistor is the same. In different time periods, when the corresponding pixel is in a liquid crystal torsion state, the source electrode voltage of the switching transistor is greater than the common electrode end; when the corresponding pixel is in a liquid crystal non-torsion state, the source electrode voltage of the switching transistor is less than the common electrode end. Not only the size relationship between the source electrode voltage of the switching transistor and the voltage of the common electrode end is switched to prevent liquid crystal polarization, but also the bistable failure, the reflectivity reduction or the state mis-switching of the cholesteric liquid crystal display panel caused by the leakage in the long-time static keeping process can be inhibited, the picture keeping time is prolonged, and the display reliability is improved.

A non-heat treated steel for a crankshaft of the present invention comprises iron (Fe) as a main component and also comprises 0.37 to 0.43 mass % of carbon (C), 0.15 to 0.35 mass % of silicon (Si), 0.90 to 1.30 mass % of manganese (Mn), 0.08 to 0.15 mass % of vanadium (V); and the content of phosphorous (P) is 0.030 mass % or less, the content of copper (Cu) is 0.300 mass % or less, the content of nickel (Ni) is 0.30 mass % or less, and the content of chromium (Cr) is 0.35 mass % or less. The non-heat treated steel also comprises 0.010 to 0.035 mass % of sulfur (S) and 0.02 to 0.05 mass % of bismuth (Bi), which are machinability-improving elements. Thus, the non-heat treated steel has a high fatigue strength and a high yield strength and also has an excellent machinability.

The utility model discloses a kind of gold stamping foil with microstructure texture, it is related to hot stamping material technical field, it aims at solving the process of traditional gold stamping foil in use, for the lack of deformation allowance of curved surface, special-shaped printing material, lead to rupture, wrinkle in hot-pressing process due to local excessive stretching, it is easy to produce the problem, including base paper component and metal foil component, the top of base paper component is provided with metal foil component;The base paper component includes base paper film, the top of base paper film is provided with sticky glue layer;The metal foil component includes the base film layer being set in the top of sticky glue layer, the top of base film layer is provided with gold foil wrinkle, the bottom of base film layer is provided with protruding anchor point, and the protruding anchor point penetrates sticky glue layer.The utility model is designed through base paper component and metal foil component, can be adapted to curved surface, special-shaped printing material, reduce the risk of stretching rupture.

The present application relates to the technical field of biomedical materials, in particular to a hyaluronic acid composite polysaccharide composition, a preparation method and application thereof. Specifically, by introducing other high-molecular mucopolysaccharides on the basis of hyaluronic acid cross-linked chondroitin sulfate (HA-CS), the present application can form an interpenetrating network structure with HA-CS through electrostatic interaction, or linear polysaccharide chains can form hydrogen bonds with the hydroxyl and carboxyl groups of HA-CS, further forming a dense network structure, enhancing the adhesion of the material to the bladder mucosa, reducing the risk of loss with urine, and prolonging the retention time of the temporary protective layer; at the same time, the synergistic effect between the various composite polysaccharide components increases the stability of the material itself, improves the residence time of the composition on the surface of the bladder mucosa, enables it to continuously exert a protective and repairing effect, and effectively promotes the repair of bladder mucosal injury, thus having good practical application value.

The utility model provides a sealing structure of an oil injection needle valve and an oil injection nozzle cavity, which improves the original surface sealing into linear sealing, increases the sealing pressure, ensures the sealing reliability and reduces the processing difficulty. The oil injection needle valve comprises a guide section and a needle valve section, and a needle valve head is arranged at the bottom of the needle valve; an oil guide cavity, a conical closing cavity and an oil spraying cavity are formed in the oil spraying nozzle; the conical closing cavity is a conical surface with the closing angle of alpha degrees inwards from top to bottom, the needle valve head comprises a first conical surface with the closing angle of beta degrees and a second conical surface with the closing angle of gamma degrees corresponding to the conical closing cavity, values of alpha, beta and gamma are angulation values corresponding to the vertical middle vertical plane, beta is smaller than alpha, gamma is larger than alpha, and the first conical surface is a conical surface with the closing angle of alpha degrees. And the first conical surface and the second conical surface are combined to form a circular ring line for sealing the conical closing cavity.

The present application provides a ternary cathode material, a method for preparing the same, a cathode plate, a secondary battery, and an electronic device. The ternary cathode material includes a ternary cathode material matrix including a doped region. The doped region includes an aluminum-rich doped region distributed within a bulk phase of the ternary cathode material matrix, and a titanium-rich doped region distributed in a surface layer of the ternary cathode material matrix.

The utility model discloses a lithium cell charging and discharging power-off alarm device, include: box, box lid, its setting on the upper end surface of box, handle, its setting on the upper end surface of box lid, battery body, its setting on the bottom end inner wall of box, power-off alarm subassembly is used for carrying out power-off alarm monitoring to battery body, and sets up on battery body, power-off alarm subassembly includes power-off alarm detection structure, power-off alarm detection structure connects on the upper end surface of battery body, and power-off alarm detection structure is connected with battery body, and still be provided with display piece on the box, through setting power-off alarm detection structure, display piece composition's power-off alarm subassembly can carry out power-off alarm detection to battery body, when battery body appears power-off situation, can alarm through sound alarm and light alarm, is convenient for staff to check battery body, and the convenient comparison.

The invention discloses a process control method for improving the temperature rise efficiency of an LF furnace electrode, and belongs to the technical field of metallurgy. The method comprises the following steps: implementing a pre-slagging system in a converter tapping process, and adding an aluminum product and lime to form reductive top slag; the method comprises the following steps of: recycling hot-state refining slag pouring residue of the previous furnace, further improving the reducibility of top slag, forming high-reducibility (FeO + MnO < = 1%) top slag before the LF enters a station, cooperating with a steel ladle bottom blowing three-stage control system, controlling small gas quantity of bottom blowing in the earlier stage of the LF, forbidding adding of slagging materials and alloys, achieving a good submerged arc effect in a power transmission process, and ensuring stable output of an electric arc. By means of the measures, rapid heating in the power transmission process of the LF furnace is achieved, the electrode heating efficiency is improved by 15% or above, power consumption is remarkably reduced, the refining efficiency and the molten steel cleanliness are improved, and good industrial application prospects are achieved.

The invention relates to charcoal stable coated slow-release urea and a preparation method thereof, and belongs to the technical field of agricultural chemical fertilizers. The slow-release urea comprises a urea core and a coating layer, wherein the coating layer comprises biochar, a modified binder, a vegetable oil nano-emulsion sealant and a urease inhibitor and / or a nitrification inhibitor. The preparation method comprises the following steps: firstly, preparing the modified binder and the nano-emulsion; uniformly mixing the biochar with an inhibitor; the preparation method comprises the following steps: alternately spraying a binder, adding charcoal-inhibitor mixed powder and spraying a nano emulsion on preheated and rolled urea particles, circularly coating for multiple times, and drying. According to the invention, the biochar is used as a green film material, through a unique coating structure, the slow release of nutrients and the long-acting and stable cooperation of the inhibitor are realized, the nitrogen fertilizer utilization rate is obviously improved, the environmental pollution is reduced, the process is simple, and the cost is relatively low.

The present application relates to surface bright type artificial leather based on waste leather material and its preparation process, and belongs to the technical field of artificial leather preparation. The artificial leather is prepared by two-step chemical modification of alkali protease hydrolysis and silicon propylene grafting on waste leather powder, which significantly improves the compatibility with the resin matrix. Then, the waste leather powder is blended with resin, additives and other plasticizing agents, and is calendered and attached to the pretreated leather base cloth. Finally, a self-made silane modified high gloss resin coating is coated and hot pressed and cured. The present application realizes the high value utilization of waste leather material. The artificial leather has high surface gloss, wear resistance and aging resistance, and is low in cost and environmentally friendly.