41results about How to "Avoid absorption" patented technology

The utility model discloses a display substrate and a display device. The display substrate comprises a substrate; the driving layer is positioned on one side of the substrate and is provided with a plurality of conductive bonding pads; the light absorption layer is located on the side, away from the substrate, of the driving layer, the orthographic projection of the light absorption layer on the substrate and the orthographic projection of the driving layer on the substrate are overlapped, the light absorption layer is provided with a plurality of first via holes corresponding to the plurality of conductive bonding pads, and the orthographic projection of the first via holes on the substrate and the orthographic projection of the corresponding conductive bonding pads on the substrate are overlapped; the light-emitting units are located on the side, away from the substrate, of the light absorption layer and electrically connected with at least part of the conductive bonding pads through the first via holes; the display substrate further comprises a light transmitting layer and a base material layer which are located on the side, away from the substrate, of the light absorbing layer and sequentially arranged in a stacked mode, the light transmitting layer and the base material layer are continuously distributed film layers, and the light transmitting layer is located between the adjacent light emitting units and located on the side, away from the substrate, of the light emitting units. The display substrate has low reflectivity and high transmittance at the same time, and the application scene is wider.

The application relates to the technical field of photoelectric materials and scintillators, and particularly discloses an ionic rare earth complex scintillator glass, a low-temperature melting preparation method thereof and application. The low-temperature melting quenching process is developed, the crystalline ionic europium complex is directly melted and rapidly cooled under the condition of no solvent, and the direct preparation of the ionic rare earth complex transparent scintillator glass is realized. The prepared glass scintillator material has high transparency, high luminous efficiency, high rare earth content and excellent processability, and fundamentally eliminates the light scattering caused by particle agglomeration and phase separation in the traditional composite thin film, and breaks through the concentration quenching limitation. The glass scintillator material shows excellent luminous performance under X-ray excitation, and can significantly improve the imaging resolution and detection sensitivity. The application provides a feasible technical path for the development of a new type of rare earth scintillator material, and has important application prospects in the fields of medical imaging, nondestructive testing and high-energy radiation detection.

This invention belongs to the field of back-contact battery technology, specifically relating to a back-contact battery and its battery assembly with a specific front-side structure. This specific front-side structure includes a tunneling oxide layer and a specifically doped amorphous silicon layer sequentially disposed on the front side of a silicon substrate. Within the specifically doped amorphous silicon layer, a low-doped amorphous silicon layer, a high-doped amorphous silicon layer, and an oxygen-doped amorphous silicon layer are sequentially disposed along the direction away from the tunneling oxide layer. The specifically doped amorphous silicon layer is doped with phosphorus (P) and contains hydrogen (H). The P doping concentration C1 in the low-doped amorphous silicon layer and the P doping concentration C3 in the oxygen-doped amorphous silicon layer are both lower than the P doping concentration C2 in the high-doped amorphous silicon layer. This specific front-side structure enables the back-contact battery to achieve an absorption rate exceeding 85% for incident light within 400 nm. The back-contact battery of this invention maintains good performance even after long-term exposure to ultraviolet light, improving the battery's UV reliability while achieving high transmittance and high battery efficiency.

The invention discloses a stem cell-based microvesicle as well as a preparation method and application thereof, belongs to the technical field of biological tissue engineering, and particularly relates to a preparation method of the stem cell-based microvesicle, which comprises the following steps: culturing stem cells until the cell fusion degree is 80-90%, performing hypoxia treatment, and cleaning for 2-3 times; standing and culturing the cleaned stem cells, then adding a calcium ion carrier, and carrying out ultrasonic treatment; the serum-free basic culture medium containing the calcium ion carrier is immediately absorbed and removed, the cells are cleaned through PBS, culture is conducted for 24 h, and cell supernatant is collected and merged respectively; performing first centrifugation to remove cell debris; performing second centrifugation to remove dead cells and large cell debris; carrying out third centrifugation to remove organelles; fourth centrifugation is carried out, large vesicles are removed, and a final supernatant is obtained; and filtering and centrifuging to obtain a microvesicle precipitate. The preparation method of the microvesicles aims at systematically improving the yield and biological activity of the stem cell microvesicles through low-oxygen pre-stimulation, ultrasonic-calcium ion carrier synergistic induction and differential centrifugation.

This invention discloses a Chlorella heptapeptide TGPLGSR with multi-target lipid-lowering activity, its preparation method, and its applications. The amino acid sequence of this heptapeptide is Thr-Gly-Pro-Leu-Gly-Ser-Arg. The preparation method includes: performing ultraviolet and electroporation combined mutagenesis on wild-type Chlorella proteoglycans to obtain a high-protein-content mutant algal strain; obtaining algal protein through fermentation and synergistic extraction and purification with alcohols; directionally digesting the protein with alkaline protease, followed by enriching the active peptide components through ultrafiltration and gel chromatography; and finally, screening the heptapeptide using liquid chromatography-mass spectrometry (LC-MS), computer-aided prediction, and molecular docking techniques. This heptapeptide exhibits potent inhibitory activity against pancreatic lipase and can dose-dependently reduce the accumulation of triglycerides and cholesterol in 3T3-L1 cells. Its mechanism involves multiple target pathways, including inhibition of MMP-9, activation of AMPK phosphorylation, and downregulation of PNLIP, and it can be used to develop lipid-lowering functional foods or health products.

A display device according to one aspect of this disclosure includes: a substrate including a plurality of sub-pixels; a plurality of transistors disposed on the substrate; a plurality of reflective electrodes disposed on the transistors; a plurality of bonding layers bonded to some of the reflective electrodes and comprising a conductive black material; a plurality of light-emitting diodes disposed on the plurality of bonding layers to correspond to the plurality of bonding layers, and comprising a first electrode, a first semiconductor layer, an active layer, a second semiconductor layer, and a second electrode; and a plurality of reflective layers disposed on the plurality of bonding layers, electrically connected to the plurality of reflective electrodes respectively, and in contact with the plurality of light-emitting diodes. Therefore, the absorption of light emitted from the light-emitting diodes by the bonding layers is suppressed, and the light extraction efficiency can be improved.

The invention discloses a particle sorting micro-fluidic chip integrated with a piezoelectric actuator and a use method of the particle sorting micro-fluidic chip, and relates to the technical field of micro-fluidic sorting. The device comprises a particle inlet, a jet liquid inlet, two sorting outlets, a sorting area and a piezoelectric actuator. The jet flow cavity is in fluid communication with the sorting area, and a jet flow outlet of the jet flow cavity is located at the highest gravity position, so that gas in the jet flow cavity can be discharged through the jet flow outlet under the action of gravity. According to the invention, the chip is vertically or obliquely placed, so that the jet flow outlet is located at a functional position which is beneficial to natural gathering and discharging of gas under the action of gravity, and bubbles in the cavity are naturally discharged by utilizing the gravity. The jet flow actuating efficiency is improved, the sorting process has higher tolerance to the initial transverse position, the arrival time sequence and the size fluctuation of the particles, and stable and high-purity particle sorting can be achieved without depending on the high-precision pre-alignment condition.

The invention belongs to the technical field of functional microorganism application, and particularly relates to a novel lipid-lowering peptide derived from a probiotic thallus and application thereof, the novel lipid-lowering peptide is a crushed substance derived from a probiotic lactobacillus plantarum thallus, and the molecular weight of the novel lipid-lowering peptide is less than 3kDa. And two key polypeptides APGFGDR (AP7) and TESGAFGR (TE8) are identified from the components, and can specifically inhibit the activities of pancreatic lipase and pancreatic cholesterol esterase. The extracted thallus peptide can be efficiently combined with cholate to inhibit the formation of cholesterol micelles, and has a remarkable inhibiting effect on pancreatic lipase and pancreatic cholesterol esterase. Animal experiments show that the mycopeptide can effectively improve lipid metabolism disorder induced by high fat diet, inhibit weight gain, reduce serum and liver lipid levels and relieve fatty degeneration and inflammation of the liver. The lipid-lowering peptide disclosed by the invention is high in safety and multi-target in action, and can be used for preparing functional products for preventing or treating metabolic diseases such as obesity, hyperlipidemia and the like.

The present invention provides a solid fuel production system having a sewage sludge solid fuel deodorizing heat treatment device, including a mixer mixing sludge or an additive to produce a first mixture; a first dryer performing first drying in such a manner that the first mixture supplied from the mixer reaches a first moisture content; a second dryer producing a dried mixture of a second moisture content by heating and drying the first mixture of the first moisture content; a former molding the dried mixture by pressure molding; and a heat treatment device performing heat treatment on the solid fuel put into the inside after molding is completed to remove odor generated from the solid fuel molded in the former.

The utility model relates to the technical field of lithium battery positive electrode materials, and discloses a pretreatment sagger and sintering equipment. The lithium layer is arranged at the bottom of the sagger body and is suitable for preventing lithium from being absorbed by the sagger body in the sintering process; the lithium layer is composed of one of lithium carbonate, lithium hydroxide or lithium oxide and is fixed to the bottom of the sagger body. The sintering equipment comprises a sintering furnace; the saggar bearing frame is arranged in the sintering furnace and used for fixing and arranging the multiple pretreatment saggars. The gas circulation system is used for introducing inert gas or reducing gas into the furnace in the sintering process so as to prevent lithium from being oxidized. The lithium layer can reduce direct contact between the sagger body and lithium, so that corrosion and abrasion of the sagger are reduced, and the service life of the sagger is prolonged.

The application relates to a cleaning device. The cleaning device comprises a frame, a cleaning assembly, a hand lever assembly, a water injection assembly and a switch assembly. The cleaning assembly comprises a cleaning roller which is rotatably connected to the frame. The hand lever assembly is connected to one end of the frame which is away from the cleaning assembly. The water injection assembly comprises a water tank and a hose. The water tank is mounted on the hand lever assembly. One end of the hose is connected to the water tank. The hose is partially arranged in the hand lever assembly and partially arranged in the frame, so that one end of the hose which is away from the water tank can inject water into the cleaning roller. The switch assembly is at least partially mounted on the hand lever assembly to realize the conduction or blockage of the hose.

The invention belongs to the technical field of gas detection, and particularly relates to a gas concentration measurement method and system based on adaptive wavelength. The measurement method comprises the following steps: obtaining a waveform curve of a to-be-measured gas absorption signal; if the current waveform curve is distorted, the to-be-detected gas is scanned again after the current scanning interval is widened until the newest waveform curve is not distorted, and the newest waveform curve is subjected to convolution processing to obtain a second reasonable curve; and if K3 continuous sampling points greater than a third set threshold exist in the absorption interval of the second reasonable curve, recording the current second reasonable curve as a third reasonable curve, and calculating the current concentration of the gas to be detected according to the third reasonable curve, on the contrary, the scanning interval corresponding to the current second reasonable curve is narrowed, and then the to-be-detected gas is scanned again. According to the invention, high-efficiency and accurate concentration measurement can be carried out on to-be-measured gases with different concentrations.

The application discloses an environment-friendly anti-dissolution gel foam extinguishing agent, which is composed of a foaming agent, a gelling agent, a crosslinking agent and a flame retardant, wherein the foaming agent is alkyl polyglycoside APG0810, the gelling agent is kappa-carrageenan, the crosslinking agent is gluconolactone, and the flame retardant is tributyl phosphate. Compared with existing foam extinguishing agents, the anti-dissolution gel foam extinguishing agent has longer storage stability, fewer component types, better anti-dissolution and better extinguishing performance. In addition, the anti-dissolution gel foam extinguishing agent has lower manufacturing cost, simple preparation process and is more convenient for large-scale industrial production.

The invention relates to the technical field of microorganisms, and discloses a lactobacillus zeae strain and an application thereof, and the preservation number of the lactobacillus zeae strain is CGMCC (China General Microbiological Culture Collection Center) NO.26771. The lactobacillus zeae strain has the advantages that the lactobacillus zeae strain can be used for preparing a lactobacillus zeae strain; the lactobacillus zeae provided by the invention has the effects of inhibiting the activity of pathogenic bacteria, reducing inflammatory factors, inhibiting alveolar bone resorption and regulating digestive tract flora.

The application discloses weather-resistant polyester and a preparation method thereof, and relates to the technical field of polyester fibers. The weather-resistant polyester is prepared from the following components in parts by mass: 90-110 parts of polyethylene terephthalate resin, 1-2 parts of a weather-resistant agent, 2-5 parts of a dispersing agent, 1.5-3 parts of a lubricant, and 5-15 parts of a nano functional filler. The weather-resistant agent is added to efficiently absorb ultraviolet light, block photoaging chain reactions, reduce performance degradation of the polyester in adverse environments such as ultraviolet light and heat and moisture, and effectively delay the aging process.

The utility model discloses a separation circulating device and gasification kettle, separation circulating device includes heating case, heat exchange structure, circulating pump and air sending structure, heating case is used for containing and heating heat exchange fluid, heat exchange structure is equipped with installation site and heat exchange position, and has the heat exchange flow channel that passes through installation site and heat exchange position, and both ends of heat exchange flow channel all communicate heating case, circulating pump communicates heat exchange flow channel, is used for driving heat exchange fluid and circulates flow between heat exchange flow channel and heating case, air sending structure is installed in heat exchange structure, and is located installation site, and has air sending flow channel and air sending mouth, and air sending mouth communicates air sending flow channel, is used for output air. The scheme can heat air and liquid light hydrocarbon simultaneously through heat exchange structure, realizes air preheating, avoids cold air to directly contact liquid light hydrocarbon and absorbs light hydrocarbon heat, and guarantees liquid light hydrocarbon and heat exchange structure effective heat exchange, and then improves light hydrocarbon gas production efficiency, and the device is relatively compact, saves the occupied space.

This invention belongs to the fields of biomedical materials and colloid chemistry, and discloses a structurally remodeled egg yolk low-density lipoprotein biomimetic liposome and its application in regulating cholesterol metabolism. The method includes extracting and purifying natural egg yolk low-density lipoprotein; selectively removing endogenous cholesterol by adding β-cyclodextrin under alkaline conditions; adding a phytosterol ethanol solution to the cholesterol-removed low-density lipoprotein dispersion, followed by incubation and dialysis purification to obtain the biomimetic liposome. The obtained biomimetic liposome uses partially cholesterol-removed egg yolk low-density lipoprotein as its structural framework, with phytosterols embedded in its phospholipid monolayer and lipid core interface. This biomimetic liposome can inhibit cholesterol micelle formation, reduce cholesterol absorption, promote macrophage cholesterol efflux, and inhibit macrophage foam formation. It can be used to prepare cholesterol metabolism regulating materials, functional delivery systems, and dietary supplement products.

The utility model provides a kind of paste-free screen and terminal equipment, it relates to screen technical field.Paste-free screen, including touch screen, be equipped with placement slot and place the frame of touch screen, be equipped with the frame in the frame and fixed touch screen and be equipped with the display screen in the frame, wherein, frame and the side frame of frame are equipped with screen connecting hole, with the screen fixed hole of display screen side edge cooperation fastening display screen;Frame and the upper and lower frame of frame are equipped with frame connecting hole, for the fastening of frame and frame.The paste-free screen and terminal equipment of the utility model can achieve the purpose of fastening screen, and at the same time, it is convenient to disassemble, convenient to repair, and beneficial to recycling since it is paste-free mode.

The utility model discloses a kind of high-nickel material exhaust pipe annealing anti-deformation support tool, belong to thin-walled structure annealing tool technical field, for quickly supporting exhaust pipe, including pillow block, support component and locknut, wherein, the clamping of positioning shaft has several hinged hoops, hinged hoop is connected with corresponding support component, to play the role of limiting to fixed support component, and the end of positioning shaft is threadedly connected with locknut, the end of locknut is abutted with adjacent support component, and because several support components head-to-head abut. Wherein, the top of support is rotatably provided with positioning shaft, several support components are sleeved on positioning shaft, when rotating locknut, several support components can be synchronously pushed to expand synchronously, in turn make single support component expand and abut with exhaust pipe inner wall, prevent exhaust pipe from appearing deformation. The utility model has the advantage of fast installation speed compared with prior art, can be adapted to various inner diameter thin-walled structure pipe fittings.

This invention discloses an in-situ colonic short-chain fatty acid production promoter, its preparation method, and its application. The preparation method includes: Step 1, reaction system preparation: Raffinose is added to distilled water and stirred at 50-60°C until completely dissolved, preparing a raffinose aqueous solution with a mass-volume concentration of 20-40%. The pH of the solution is adjusted to 8-9 to obtain an alkaline reaction system; Step 2, esterification reaction: Maintaining the system at 50-60°C and pH 8-9, butyric anhydride is slowly added to the alkaline reaction system. After the addition is complete, the reaction is maintained at this temperature, with the total reaction time controlled at 1-6 hours; after the reaction is completed, the pH of the system is adjusted to 6-7 to terminate the reaction, obtaining an esterification reaction solution; Step 3, post-processing: The esterification reaction solution is cooled to room temperature and successively concentrated, purified, and lyophilized to obtain the target product. The beneficial effects of this invention are: it can comprehensively improve the level of short-chain fatty acids in the colon and optimize the intestinal flora structure, breaking through the bottleneck of short-chain fatty acid delivery.

This utility model relates to the field of automated mechanical transmission equipment, and discloses a mobile and stable track-type sponge conveyor, including a support frame, four track bodies, a first support plate, a second support plate, and multiple rain shields. Multiple rollers are rotatably mounted on both sides of the upper surfaces of the first and second support plates. Rotating shafts are rotatably mounted on both sides of the middle of the first support plate, and a first conveyor belt is sleeved around the two rotating shafts. Rotating shafts are rotatably mounted on both sides of the middle of the second support plate, and a second conveyor belt is sleeved around the two transmission shafts. A second motor is fixedly mounted at the upper corner of the front end of the support frame. Rotating columns are fixedly connected to the front ends of the multiple rain shields and the rear output ends of the second motor, and discs are fixedly mounted at the front ends of the multiple rotating columns. This utility model allows the device to quickly respond to sudden rain and prevents damage to the sponge due to stretching during loading or unloading.

The present application belongs to the technical field of cosmetics or drugs, and particularly relates to a composition for treating gingivitis and application thereof. The composition is composed of shikonin acid and shikonin naphthoquinone, and the mass ratio of the shikonin acid to the shikonin naphthoquinone is 10-100:1. The present application has excellent effects in improving gingival bleeding and inhibiting alveolar bone absorption. The shikonin acid is prepared by high-pressure steam explosion combined with ethanol extraction, activated carbon decolorization and macroporous adsorption resin technology, and the shikonin naphthoquinone is prepared by supercritical CO2 extraction combined with molecular distillation technology. The preparation method is green, stable and controllable, the obtained active ingredient has high purity, and is suitable for industrial production. The composition of the present application is derived from natural plant ingredients, has high safety, can be prepared into various oral care dosage forms such as gels, toothpastes and mouthwashes, is used for the auxiliary treatment or daily care of gingivitis, and has good application prospect.

The application discloses a strontium-doped inorganic nanofiber composite 3D printing scaffold for bone defect repair and a preparation method thereof, and belongs to the field of bone defect repair biomaterials. The preparation method comprises the following steps: dissolving strontium nitrate in a mixed solution of tetraethyl orthosilicate, phosphoric acid and deionized water, stirring and mixing the obtained SiO2-SrO sol with a PVA solution, electrospinning, high-temperature calcination, obtaining a SiO2-SrO nanofiber membrane, cutting small pieces, high-speed stirring and dispersing, adding deionized water, high-speed homogenizing, freeze-drying, mixing with deionized water, grinding and freeze-drying, obtaining SiO2-SrO nanofiber as a dispersed phase, magnetically stirring and uniformly mixing CS solution and HA solution as a continuous phase, fully mixing and uniformly mixing to obtain a biological ink, and then 3D printing, freeze-drying and ultraviolet sterilization of the obtained scaffold, and immersion in a crosslinking agent solution for crosslinking reaction. The application realizes macroscopic and microscopic double-layer repair functions of the scaffold by combining electrospinning with 3D printing, and is used for bone defect repair.

This invention discloses an optical pulse generation device based on a cascaded As2Se3 waveguide, belonging to the field of laser technology. It includes an integrated femtosecond pulse source and a cascaded As2Se3 waveguide. The integrated femtosecond pulse source generates femtosecond pulses and outputs them to the cascaded As2Se3 waveguide. The cascaded As2Se3 waveguide receives and conducts the femtosecond pulses from the integrated femtosecond pulse source. The cascaded As2Se3 waveguide comprises multiple strip waveguides of different widths along its length. Different strip waveguides provide different dispersion modes for the femtosecond pulses. The input segment exhibits negative dispersion in the near-infrared region, shifting the input near-infrared pulse to the mid-infrared band. The output segment also exhibits negative dispersion in the mid-infrared region, further shifting the pulse wavelength. This expands the wavelength coverage of on-chip Raman soliton self-frequency shifting. Through dispersion modulation, the input segment allows a near-infrared laser to be used as a pump source to generate Raman soliton self-frequency shifts, simplifying the complexity of the on-chip Raman soliton self-frequency shifting system and reducing costs.

The present application provides a kind of low-calorie high dietary fiber fava bean powder and its preparation method, it relates to health-care product technical field.The present application fava bean powder includes: fava bean raw material powder, traditional Chinese medicine extract, dietary fiber, gamma-cyclodextrin, resistant dextrin, thickening agent, flavoring agent;Traditional Chinese medicine extract is composed of dendrobium extract, rhodiola extract and lotus leaf extract.Fresh fava bean whole plant is freeze-dried, pulverized to prepare fava bean raw material powder;Dendrobium extract is prepared by long bifidobacterium and pentose pediococcus compound fermentation, rhodiola extract is prepared by ultrasonic-assisted alcohol extraction combined with ultrafiltration purification, and lotus leaf extract is prepared by flash extraction combined with macroporous resin purification.The present application effectively protects the heat-sensitive active ingredients in fava bean and traditional Chinese medicine by adding resistant dextrin and gamma-cyclodextrin double embedding technology, improves the pungent bitter taste, and improves the instant performance.The present application fava bean powder has the effects of reducing blood sugar, reducing blood lipids and assisting in weight loss, and can be used for preparing related health-care products.

The invention relates to the technical field of glass wafer processing, and discloses a laser cutting dust cleaning device for glass wafer processing, which comprises a dust spraying assembly arranged in laser cutting equipment, the dust spraying assembly is arranged around a laser cutting head, a dust suction assembly is arranged in the laser cutting equipment, and the dust suction assembly is arranged around the laser cutting head. The laser cutting device comprises a laser cutting head and a dust spraying assembly arranged around the laser cutting head, the dust spraying assembly is arranged around the laser cutting head, the dust sucking assembly surrounds the laser cutting head and is located below the dust spraying assembly, and the dust spraying assembly arranged around the laser cutting head and the dust sucking assembly located below the dust spraying assembly work cooperatively; dust in a cutting groove is quickly blown away by means of airflow jetted in a specific direction, and the blown-away dust is accurately sucked into the dust collection cover on the opposite side by means of vacuum suction force working synchronously, so that'production and cleaning 'is realized.

This invention discloses a sodium methoxide solution distillation suction device, comprising a distillation suction device body, with a vacuum pump connected to the left side of the body. This invention involves placing a rubber tube into a sodium methoxide solution container, which then floats continuously on the surface via a float ring, preventing the absorption of impurities from the sodium methoxide solution. The user then activates the vacuum pump, which extracts air from the inside of the device body, creating a negative pressure environment. The sodium methoxide solution is then drawn through a metal tube and absorbed into the device body via an absorption hopper. Impurities in the solution are then purified using filter and purification plates, and the solution can be discharged and collected. This method replaces existing absorption methods that easily absorb impurities during the absorption process, thus avoiding the absorption of impurities during the absorption process.

This invention relates to the field of downhole safety detection equipment technology, and discloses an acoustic imaging logging mechanism for downhole safety detection, including a logging device, a processing shaft, and a detection shaft. An annular sleeve is provided on the detection shaft, and a movable shaft is installed inside the annular sleeve. A detection frame is provided at the end of the movable shaft, and a monitoring rod is provided inside the detection frame. A roller is provided at the end of the monitoring rod, and a disassembly frame is provided on one side of the monitoring rod. An annular disc is provided inside the disassembly frame, and a sliding block is installed on the annular disc. An arc-shaped panel is installed at the end of the sliding block, and a button is installed on the inner wall of the disassembly frame. This acoustic imaging logging mechanism for downhole safety detection senses the presence of mud cake by the change in the rotational speed of the roller as it rolls on the well wall surface. When the roller passes over the mud cake, the rotational speed decreases, the centrifugal force on the sliding block decreases, causing the arc-shaped panel to separate from the button, triggering the scraper to extend and scrape off the mud cake, thus avoiding the absorption and scattering of acoustic signals by the mud cake.

The utility model discloses a fertilizing tool for apple planting, which comprises a bottom plate, supporting legs are fixedly connected to the outer walls of the two sides of the bottom plate, universal wheels are fixedly connected to the two ends of each supporting leg, a fertilizer cylinder is fixedly connected to the upper end of the bottom plate, two sets of side plates are fixedly connected to the outer walls of one set of supporting legs, and the two sets of side plates are fixedly connected to the outer walls of the other set of supporting legs. A double-end threaded rod is rotatably connected between the two groups of side plates, two groups of moving blocks are in threaded connection with a threaded section of the double-end threaded rod, limiting plates are fixedly connected to the outer walls of the moving blocks, the outer walls of the limiting plates are arc-shaped, and an adjusting mechanism for adjusting the heights of the furrowing blade and the two groups of soil covering plates is mounted at the upper end of the bottom plate. Through the cooperation of the double-end threaded rod, the moving block and the arc-shaped limiting plate, the fertilizer applying device can be automatically attached to a tree trunk, it is ensured that a fertilizer applying point is stably kept within the safety range of 50-60 cm, the problem that a root system is burnt due to too close fertilizer applying or absorption is affected due to too far fertilizer applying is effectively solved, and accurate annular fertilizer applying is achieved.

The application discloses a kind of water product targeted purification heavy metal removal methods based on ozone and nano selenium cooperation, and specifically relates to aquatic product processing technical field.Single ozone treatment cannot remove heavy metals enriched in water products in body, and chemical chelation process can cause secondary residue and damage product quality technical defects are solved.The application is through four-step core process of low-concentration ozone pretreatment, gradient ozone deep disinfection, ozone-nano selenium cooperative targeted purification, standing and keeping alive, accurately controls the ozone concentration of each stage, and is matched with 2-5nm high-purity nano selenium, to complete purification under specific water temperature, pH and dissolved oxygen conditions.The application can realize efficient disinfection of deep pathogenic bacteria of aquatic products, targeted removal of heavy metals such as cadmium, lead and arsenic in body, simultaneously relieve oxidative stress, protect product freshness and original flavor, have no chemical residue, and are suitable for high-end raw aquatic product industrial production.