26results about How to "Prevent discoloration" patented technology

The invention discloses a low-temperature storage and preservation method for litchis. The method comprises the following steps of: removing branches and leaves of fresh litchis which are 80-90% mature, and reserving bare litchis; the fruits pass through a sorting line, and defective fruits are picked out; and soaking the lychee in an ergothioneine and mannitol solution, draining water, packaging the lychee with a moisture-permeable and air-permeable functional fresh-keeping bag, and storing the lychee at the temperature of-1 DEG C to 5 DEG C. According to the fresh-keeping method combining ergothioneine, mannitol and a moisture-permeable and air-permeable functional fresh-keeping bag, the fresh-keeping period of the litchis can be effectively prolonged through natural oxidation resistance and hydration and by matching with humidity adjustment and gas exchange, and the flavor, texture and nutritional ingredients of the litchis are kept. The method not only meets green and environment-friendly requirements, but also can remarkably reduce loss of litchis in transportation and storage, reduce food waste and improve food safety, and is an advanced and efficient fruit fresh-keeping technology.

The embodiment of the utility model discloses an electric toothbrush handle and an electric toothbrush. The electric toothbrush handle comprises a shell and a sealing rubber sleeve, the shell is provided with a containing cavity and an avoiding hole communicated with the containing cavity, and the avoiding hole is used for a motor shaft to penetrate through; and the sealing rubber sleeve is arranged in the avoiding hole, the sealing rubber sleeve is used for sealing a gap between the hole wall of the avoiding hole and the motor shaft, and an antibacterial structure is arranged at the end, exposed out of the shell, of the sealing rubber sleeve. According to the electric toothbrush handle disclosed by the embodiment of the utility model, the sealing rubber sleeve can be prevented from being polluted by bacteria, and the healthy and sanitary conditions of the handle are improved. The electric toothbrush disclosed by the embodiment of the invention comprises the electric toothbrush handle.

The invention discloses a steel structure rust removal device for a construction site. The steel structure rust removal device comprises a walking plate trailer, a stirring box, a water storage box, a material storage box, a high-pressure pump, a liquid conveying pipe and an air compressor. The stirring box is fixed on the top surface of the walking plate trailer; a liquid outlet is formed in the bottom of one side wall of the stirring box; a water outlet communicated with the inner cavity of the stirring box is formed in the bottom wall of the water storage box; grinding materials are contained in the storage box, and a discharging gate is hinged to the bottom end of the storage box so that the grinding materials can be put into the stirring box and stirred and mixed with water to form grinding liquid; the high-pressure pump is fixed on the outer wall of the stirring box; an inlet of the high-pressure pump communicates with the liquid outlet; one end of the liquid conveying pipe is detachably connected with an outlet of the high-pressure pump, and a high-pressure nozzle is fixed at the other end; the air compressor is fixed to the top face of the walking plate trailer to provide high-pressure air, and an air outlet of the air compressor communicates with the liquid conveying pipe through an air pipe. Water and grinding materials are stirred to form mixed grinding liquid, the mixed grinding liquid is sprayed to the surface of the steel structure through high pressure for rust removal operation, and secondary pollution to the environment is avoided.

An arrangement for the degradation stable storage and transport of a liquid comprising a non-substituted saturated aliphatic C6-12 carboxylic acid in which the liquid is surrounded by a metallic container and covered with an oxygen free or at least heavily oxygen depleted inert gas phase atmosphere above the liquid.

The utility model discloses a safety type multi-chamber peritoneal infusion bag, and relates to the field of medical devices. A safety type multi-chamber peritoneal infusion bag comprises a bag body used for infusion. The infusion cavities are formed in the bag body and used for containing liquid medicine; the isolating strip is formed by welding an upper layer and a lower layer of the bag body and used for separating the infusion cavities, and when the infusion cavities are extruded by external force, the upper layer and the lower layer of the isolating strip are separated so that the adjacent infusion cavities can be communicated; the safety chamber is arranged on the bag body and is separated from the infusion chamber through an isolating strip; the number of the liquid filling openings is the same as that of the infusion cavities, and each liquid filling opening is communicated with one infusion cavity; the easily-broken plug is connected with the liquid filling opening and is used for closing the liquid filling opening when infusion is not carried out to the infusion cavity; the liquid guide port is communicated with the safety chamber and is used for guiding out the liquid medicine; and the breaking plug is connected with the liquid guide port and is used for closing the liquid guide port when the liquid medicine is not output. According to the utility model, the problems of inconvenience and sterile risk of the dosing plug opening are solved.

The invention belongs to the technical field of electrolyte additives, and particularly relates to an estersil compound and a preparation method and application thereof. Wherein the general formula of the estersil compound is as shown in formula (I) to formula (IV), R1 is methyl, ethyl, isopropyl, vinyl or phenyl, and R2 is CH2 = CH <->, CH3 <->, CH3CH2 <->, (CH3) 2CH <->, (CH3) 3C <-> or H <->. The estersil compound provided by the invention can be used as an electrolyte additive, and can inhibit discoloration of an electrolyte in an electrochemical device, so that the storage time is prolonged, and the comprehensive performance of the electrochemical device is improved.

The utility model discloses a light-emitting diode packaging structure, and relates to the technical field of light-emitting diode packaging. In the light-emitting diode packaging structure, a bracket is provided with a mounting groove, and the bottom of the mounting groove is provided with a conductive layer; the light-emitting diode chip is arranged in the mounting groove and is electrically connected to the conductive layer; the anti-vulcanization layer is arranged in the mounting groove and covers the conductive layer; the fluorescent part is arranged in the mounting groove and covers the anti-vulcanization layer and the light-emitting diode chip, and the fluorescent part comprises a colloid matrix and fluorescent powder; wherein the fluorescent part at least comprises a first fluorescent layer, a centrifugal precipitation layer is formed at the bottom of the first fluorescent layer, and a light-transmitting layer is formed at the top of the first fluorescent layer; and the fluorescent powder concentration of the centrifugal precipitation layer is higher than that of the light-transmitting layer. The light emitting efficiency of the light emitting diode packaging structure can be improved.

The utility model provides an automatic tea picking machine which comprises a picking action mechanism, the picking action mechanism comprises a shell and a bionic mouth clamp arranged on the front side of the shell, the bionic mouth clamp is composed of an upper clamp body and a lower clamp body which are vertically symmetrical, the upper clamp body and the lower clamp body are rotationally connected with the front side of the shell respectively, and an upper blade and a lower blade are arranged on the front sides of the opposite sides of the upper clamp body and the lower clamp body respectively. When the bionic mouth clamp is closed, the upper blade and the lower blade perform cutting action; the picking driving mechanism is arranged in the shell and used for driving the bionic mouth clamp to be closed or opened; the collecting mechanism comprises a backpack, a suction mechanism is arranged in the backpack, the backpack is communicated with the interior of the shell through a pipeline, and when the bionic mouth clamp is closed, a cavity formed in the bionic mouth clamp is communicated with the interior of the shell. The tea leaf picking machine is light and easy to operate, the backpack and the suction mechanism can automatically collect tea leaves, physical labor is relieved, the duckbilled scissors complete the pruning and temporary storage process, the size of the duckbilled scissors is suitable for the tea leaves with the average size, and the accurate picking precision and quality are guaranteed.

The invention discloses a ureido-containing compound and a preparation method and application thereof.The structure of the ureido-containing compound contains a ureido structure, a double-bond structure and a nitrogen heterocyclic structure, and the preparation method of the ureido-containing compound is simple; the modulus and resolution of the photosensitive resin sheet can be improved by adding the photosensitive resin sheet into the photosensitive resin sheet, the adhesiveness of the photosensitive resin sheet with a base material after being cured at a low temperature of 200 DEG C can be improved, and the discoloration of a copper or copper alloy base material can be inhibited.

The application provides a 5-aminoacetylpropionic acid-producing strain and a construction method and application thereof. The strain takes Escherichia coli as a chassis, up-regulates the expression amount of a key gene hemA of a 5-aminoacetylpropionic acid synthesis pathway, can improve the carbon flux for synthesizing 5-ALA, and simultaneously inhibits the core gene of a porphyrin precursor synthesis pathway, such as by modifying the RBS and the initiation codon of the hemE gene at the genome level and / or knocking out the hemN gene on the genome, so as to reduce the accumulation of porphyrin intermediates, to realize high-yield 5-ALA, and to effectively avoid the discoloration and deepening of the fermentation broth of the above strain, and to reduce the burden of downstream separation and purification. Further, the 5-aminoacetylpropionic acid dehydrase hemB is weakened, so as to reduce the path of 5-ALA into the porphyrin synthesis pathway, and to improve the 5-ALA yield. Thus, the purpose of improving 5-ALA and avoiding discoloration of the fermentation broth is achieved, and the production cost of 5-ALA is effectively reduced.

This invention discloses a cooking appliance and its cooking control method, as well as a computer-readable storage medium. The cooking appliance includes a pot body and a heating element. The pot body forms a cooking cavity, and the heating element heats the cooking cavity. The cooking control method includes the following steps: based on the working stage of the cooking appliance, entering a deactivation stage; controlling the treatment of the cooking cavity, the treatment including at least one of heating, vacuuming, and oxygen removal; controlling the working stage of the cooking appliance to enter the cooking stage. The technical solution of this invention aims to enable the cooking appliance to undergo deactivation treatment before steaming or boiling, preventing the food to be cooked from discoloring and turning yellow after high-temperature cooking, thereby improving the cooking effect and reliability of the cooking appliance.

The utility model discloses a washable cotton fabric, which relates to the technical field of cotton fabric, and comprises a fabric roller, a fabric mechanism is arranged on the outer surface of the fabric roller, the fabric mechanism comprises a fabric body, the fabric body is sleeved outside the fabric roller, a pure cotton layer is arranged above the fabric body, a springback layer is arranged above the pure cotton layer, and the springback layer is arranged above the pure cotton layer. A springback layer is arranged above the fabric body, a washable layer is arranged above the springback layer, a reflecting layer is arranged above the washable layer, springback columns which are arranged at equal intervals are fixedly mounted on the inner wall of the fabric body, connecting grooves which are arranged at equal intervals are formed in the bottom surface of the reflecting layer, and the top end of each springback column is clamped in the corresponding connecting groove. Through the arrangement of the fabric body, the rebound layer and the washable layer, the phenomenon that the fabric deforms when being subjected to transverse tension in the cleaning process is avoided as much as possible, through the arrangement of the reflecting layer, the phenomena of color fading and discoloring of the fabric are avoided as much as possible, and then the service life of the fabric is prolonged.

This utility model discloses a conductive structure, a battery string, and a photovoltaic module, relating to the field of photovoltaic module manufacturing technology. The conductive structure specifically includes: a strip-shaped insulating tape, comprising an insulating layer and a tape substrate laminated to one side of the insulating layer; the insulating layer includes light-transmitting insulating regions and reflective insulating regions alternately arranged along the length of the insulating tape; and a conductive element corresponding to the insulating layer, the conductive element extending in the same direction as the insulating tape, with a first conductive region corresponding to the light-transmitting insulating region located on the side of the tape substrate away from the insulating layer, so that the first conductive region is electrically connected to the grid lines of the battery cells in the photovoltaic module. This conductive structure utilizes the light-transmitting insulating region to achieve effective contact between the first conductive region of the conductive element and the battery cells, and utilizes the reflective insulating region to reflect laser light spots outside the light-transmitting insulating region, effectively avoiding the problem of discoloration of the insulating adhesive.

This invention belongs to the field of coating technology and provides a wear-resistant coating for drone shells and its preparation method. The raw materials of the coating include: hydrogenated bisphenol A epoxy resin, vinyl-terminated fluorinated polybutadiene resin, core-shell powder, aluminum borate nanofibers, polyetherimide micro powder, wear-resistant additives, silane coupling agent KH-792, light stabilizer, leveling agent and environmentally friendly solvent. The preparation method includes: (1) mixing hydrogenated bisphenol A epoxy resin and vinyl-terminated fluorinated polybutadiene resin to form a resin matrix; (2) first adding core-shell powder and aluminum borate nanofibers to the resin matrix for dispersion; after cooling to 25-30℃, adding other raw materials, stirring and defoaming to obtain the finished product. This coating has high wear resistance, wind and sand erosion resistance, low temperature crack resistance, microcrack self-repair, strong UV aging resistance and high adhesion, which can significantly improve the long-term service stability and service life of drone shells in complex and harsh environments such as high altitude, wind and sand, high and low temperature alternation, and strong ultraviolet radiation.

The present application relates to a kind of herbicide composition and its preparation method and application.The active ingredient of the herbicide composition includes acetochlor, oxaziclomefone, 2,4-D isooctyl ester;Wherein, the mass ratio of acetochlor, oxaziclomefone, 2,4-D isooctyl ester is (1-60) :(1-25) :(1-35).The herbicide composition has good control effect on annual weeds in spring soybean field and spring corn field, and each active ingredient synergistic effect can significantly reduce the use dosage, and the dispersion effect is good, the weeding effect is excellent, has no influence on the following crops, is environment-friendly, high safety and stable system.

This invention provides a heat-resistant, migration-resistant, and moisture-adhesive starch-based material. By weight, the starch-based material comprises the following components: 60-85 parts natural starch, 3-8 parts composite crosslinking agent, 5-12 parts heat-resistant modified filler, 8-15 parts low-migration composite plasticizer, 2-6 parts moisture-adhesive functional regulator, 0.5-2 parts coupling agent, 0.3-1.5 parts antioxidant stabilizer, and 30-60 parts deionized water. This invention also provides a preparation method and application of the starch-based material. Through oxidative crosslinking composite modification, functional additive compounding, and three-dimensional network structure reconstruction technology, this invention constructs a dense and stable crosslinked network, effectively inhibiting the migration and precipitation of small molecule additives, significantly improving the material's high-temperature thermal stability and resistance to moisture-heat aging, while simultaneously endowing the material with durable and controllable moisture adhesion properties. The preparation process of this invention is simple, the raw materials are inexpensive and readily available, and the material is green and biodegradable. The resulting material can be widely used in food packaging, composite adhesives, medical bonding materials, daily-use moisture-adhesive products, and biodegradable coatings.

The invention discloses a weather-resistant color master batch and a preparation method thereof, and mainly relates to the technical field of macromolecules. Compared with the prior art, the polypropylene color master batch has the advantages that the polypropylene resin is used as a main base material, the pigments, the dispersing agent, the lubricating agent and other auxiliaries are added, and the modified lignin-polyurethane emulsion is also added, so that the ultraviolet aging resistance and color stability of the polypropylene color master batch are improved. According to the invention, polyacrylamide, cellulose acetate and lignin are synthesized into modified lignin, so that damage and permeation of ultraviolet rays to the color master batch during application are reduced. And then the modified lignin is added into the preparation of the polyurethane emulsion, so that the elasticity, the flexibility and the adaptive capacity to temperature change of the color master batch are enhanced.

The utility model relates to the field of rhinestone production and processing, and provides a semi-open-close type rhinestone drying component which comprises a material frame capable of being opened and closed and further comprises a conveying device used for conveying the material frame. The drying device is provided with a drying box which is arranged above the conveying device and is used for drying the rhinestones; a first drying cavity, a second drying cavity and a third cooling cavity are formed in the drying box; the drying mechanism is arranged on the inner side walls of the first drying cavity and the second drying cavity, and the cooling mechanism is arranged on the inner side wall of the third cooling cavity and used for cooling the water drill. The turnover device is arranged in the middle of the first drying cavity and used for turning over the material frame so that the rhinestones in the material frame can be evenly heated. The equipment adopts the multiple drying cavities, moisture is rapidly dried through the high-temperature cavity, internal combined water is slowly discharged through the low-temperature cavity, and the drying efficiency is improved.

The present invention relates to an antibacterial glass composition, a manufacturing method of an antibacterial glass powder thereof, and a home appliance product including the same, the antibacterial glass composition of the present invention including: P2O5 and B2O3 in total of 55 to 75 wt%; 12 to 25 wt% of MgO; one or more of ZnO and WO3 of 12 to 25 wt%; 0.4 to 3 wt% of MoO3; and 0.4 to 3 wt% of Ag2O; and the antibacterial glass composition not including K2O, Na2O, and CaO. Thus, the present invention can provide a phosphate-based antibacterial glass composition capable of exhibiting excellent durability and antibacterial performance even though a melting point reducing component causing side effects and a structure strengthening component are excluded.

This utility model relates to the technical field of wide-angle rearview mirror lenses, and discloses a wide-angle lens for automotive exterior rearview mirrors, including a mirror frame. A fixing frame is fixedly connected to the inner wall of the mirror frame, and a connecting frame is connected to the inner wall of the fixing frame via a snap-fit ​​assembly for assembling and disassembling the lens body. The lens body is fixedly connected to the front end of the connecting frame, and a baffle is provided at the front end of the lens body. Both ends of the baffle are connected to the mirror frame via magnetic assemblies for assembling and disassembling the baffle. The lens body and the baffle have similar shapes. The snap-fit ​​assembly includes a spring fixedly connected to both sides of the inner wall of the connecting frame. In this utility model, the lens body can be pushed backward to remove it forward, providing convenient tool-free operation, avoiding damage from prying, tearing, or twisting, and offering strong compatibility with multi-material functional lenses and different vehicle models. This lowers the barrier to entry, saves time and costs, and ensures driving safety.

The invention discloses a boiling-resistant modified polypropylene material and a preparation method thereof. The boiling-resistant modified polypropylene material is prepared from the following raw materials in parts by mass: 50-70 parts of low-melt-index polypropylene, 2-10 parts of ultrahigh-melt-index polypropylene, 20-30 parts of talcum powder, 3-15 parts of a toughening agent, 1-5 parts of a compatilizer, 0.2-1 part of an antioxidant and 0.3-2 parts of carbon black. The low-melt-index polypropylene is co-polypropylene with the melt index of 10-50g / 10min at 230 DEG C / 2.16 kg; the ultrahigh melt index polypropylene is homo-polypropylene of which the melt index is 1200-1800g / 10min at 230 DEG C / 2.16 kg. The boiling-resistant modified polypropylene material disclosed by the invention has better high-temperature boiling resistance and can meet the experimental requirement of boiling for 4 hours at 99 DEG C, the foaming grade can reach 0-1 grade, and the color difference value change is less than 1.

The utility model discloses a novel distributing device applied to a steel belt cooling and curing forming machine. The novel distributing device comprises a flow guide pipe, an outer cylinder and a discharging assembly. Wherein a plurality of flow guide holes are formed in one side of the flow guide pipe; the outer cylinder sleeves the flow guide pipe, and a first pressure equalizing cavity is formed between the outer cylinder and the flow guide pipe; a heat tracing channel is arranged on the outer cylinder; the outer cylinder is further provided with a plurality of first discharging grooves and a second pressure equalizing cavity. The first discharging grooves are formed between the first pressure equalizing cavity and the second pressure equalizing cavity. A feeding pipe is arranged at one end of the outer cylinder, and an end cover plate is arranged at the other end; the feeding pipe is communicated with the flow guide pipe; the discharging assembly is connected with the outer cylinder and used for adjusting the outlet area of the second pressure equalizing cavity. According to the utility model, color change and carbonization of a liquid product are avoided; manual participation is reduced; maintenance and use are convenient, and cleaning is easy; the material distribution thickness is uniform and adjustable; the device can adapt to products with different viscosities and temperatures; the safety is high, and the sputtering phenomenon is avoided.

The utility model discloses a multi-grid folding fruit packaging box, including folding packaging box main part, the inner bottom of folding packaging box main part places humidity adjusting pad, humidity adjusting pad is polyester fiber blended water -retaining cotton material, the side of folding packaging box main part is far apart all is fixedly connected with plastic frame, the side of folding packaging box main part is far apart all is set up with a plurality of air hole, every plastic frame all is equipped with two quick -release structure, every plastic frame's inside all slidingly connected with the absorption box, every absorption box's inside all is equipped with ethylene absorbent. The utility model discloses, through setting up absorption box and sealing ring, sealing ring seals, makes the ethylene absorbent in absorption box inside absorption folding packaging box main part inside ethylene gas, reduces the maturation and senescence process of fruit, avoids the softening, the discoloration, the flavor drop of fruit, even overripe and rotten.

The present invention provides an eyeglass lens having a lens substrate and an inorganic layer, and further having a metal-containing layer between the lens substrate and the inorganic layer, the metal-containing layer containing silver and one or more metals selected from the group consisting of cobalt, nickel, zinc, copper, zirconium, molybdenum, lead, gold, and palladium.