35results about How to "Guaranteed retention rate" patented technology

The invention discloses a method for culturing large eucalyptus seedlings. The method comprises the following technical steps: 1. selection of seedling field; 2. preparation of a plug seedling bed; 3.preparation and sterilization of matrix soil; 4. selection and treatment of ear rods and tissue culture seedlings; 5. cutting and plug transplantation of the tissue culture seedlings, wherein, the cutting seedlings are vertically inserted in the midpoint of holes at depth of 1.5-2cm; and the tissue culture seedlings are directly transplanted to the prepared plug seedling bed; 6. water and fertilizer management; 7. transplantation in vessels: the seedlings are cultured in the plugs for about 50-70 days, and terminal buds are newly extracted to 2-3cm; when the root systems of most of nursery stocks are lumped, the seedlings in the plugs are transplanted to a black polyethylene plastic nursery cup with 8*8 (cm) for culturing the large seedlings; and 8. culture of the large seedlings: the transplanted young seedlings are placed in a shading arched cover for culture, and a shading net is gradually opened for hardening the seedlings at the later period; water and fertilizer management is strengthened; and then the seedlings are removed out of a seedling nursery and planted in a mountain for afforestation in the case of seedling height up to 35-50cm and ground stems up to more than 0.25cm, fertilization is stopped 10 days before afforestation, and the nursery stocks are applied with transferring fertilizer by 0.3% of complex fertilizer once 1-2 days before outplanting.

The present invention belongs to the technical field of tree transplanting and maintaining, specifically an integrated device for landscape tree/seedling maintaining. The device includes an aboveground device and an underground device, wherein the underground device contains a U-shaped permeating pipe and an underground water storage device. The U-shaped permeating pipe is buried close to the location of the root system of the landscape trees/seedlings with one end of the U-shaped permeating pipe connected to the buried underground water storage device and the other end of the U-shaped permeating pipe stretching out of the ground. The aboveground device contains an infiltrating and irrigating bag and a three-way pipe, wherein the infiltrating and irrigating bag covers the base part of a tree trunk and is connected with the other end of the U-shaped permeating pipe by the three-way pipe. The landscape tree/seedling maintaining integrated device has various maintaining functions such as supplying water and medicine, preserving moisture and temperature, preventing transpiration of branches and trunks, supplementing the root system with water, draining off water for ventilation, and automatically accumulating rainwater.

The invention relates to an ecological repairing method of sandy coast coastal protection forest, in particular to a repairing method of ecotome sandy coast coastal protection forest afforestation. Specially, embankment afforestation is carried out by clay loam near the costal road of a protection forest ecotome sandy coast or sand tidal flat facing the sea so as to improve the physical and chemical properties of sandy soil, inhibit salt, retain water, preserve fertilizer and perform the action of protection. The invention uses a clay loam embankment method to raise jejune, fertilize-leaking and water-leaking sandy soil on the sandy coast line as well as sandy coast at two wings of ocean roads into embankment-type forest land; the clay loam physical property and moisture content condition of an embankment wood pad layer can satisfy the fertility requirements of water, fertilizer, gas and heat for plant growth; and compared with other soil textures, the forest land has higher field water-holding capacity as well as moisture and fertilizer retention capability, and effectively holds the physiological activity of various organic matters and active enzymes in soil so as to ensure qualified afforestation survival rate and conservation rate.

The invention relates to a method for modifying an organic solvent-resistant nanofiltration membrane by graphene oxide, the nanofiltration membrane and an application in filtering. The method comprises the following steps of preparing a base membrane solution, mechanically stirring to completely dissolve, stilling, defoaming, scraping to form a flat plate membrane on a nonwoven cloth, and soaking the base membrane into a crosslinking agent solution to perform crosslinking reaction, wherein the base membrane has the solvent-resistant property; preparing a graphene oxide suspension, utilizing a high-pressure ultrafiltration device, and coating graphene oxide onto the surface of the crosslinking modified membrane; storing the prepared membrane in deionized water for standby. The method has the characteristics that the graphene oxide is coated onto the surface of the solvent-resistant base membrane; the preparation technology is simple, the prepared graphene oxide-polyimide nanofiltration membrane is applied into a polar solvent, and the trapping rate is higher.

The invention discloses a nanofiltration membrane cleaning agent for brine refinement and a preparation method thereof. The nanofiltration membrane cleaning agent is prepared by mixing the following components: 1-20 parts of an alkaline detergent; 0-5 parts of sodium hexametaphosphate; 0-5 parts of ethylenediaminetetraacetic acid; 2-40 parts of an acid cleaning agent; 0.1-1 part of a surfactant; 0.5-5 parts of a bactericide; and 80-200 parts of water. In a reactor with a stirring function, the alkaline cleaning agent, a dispersant, a chelating agent and the surfactant are added to the water according to the parts, and a mixture is evenly stirred; under normal temperature and normal pressure, the acidic cleaning agent and the bactericide are sequentially added, and the materials are uniformly stirred and dissolved, the materials are continuously stirred for 2 to 4 hours, the pH value is analyzed during stirring, and the pH value is adjusted between 2 and 8 by using ammoniacal liquor orcitric acid. The nanofiltration membrane cleaning agent mainly aims at the pollution of the nanofiltration membrane under a high-salt complex brine system, and can effectively clean the surface pollutant of the nanofiltration membrane, the cleaning effect is better, the cleaning agent can be saved, at the same time, the retention of calcium and magnesium in the cleaning process is stable, and thecleaning agent is also suitable for the cleaning of concentrated seawater or brine nanofiltration membrane pollutant with high calcium and magnesium ions.

The invention discloses a multi-column quadrature-axis countercurrent chromatograph. The multi-column quadrature-axis countercurrent chromatograph comprises a machine case, a support frame, a separation column assembly and a motor, wherein the support frame is mounted in the machine case, and the motor drives the support frame to rotate along the horizontal direction through a first transmission mechanism; the separation column assembly comprises four separation columns which are roughly symmetrically distributed on the left and right sides of the support frame, and the rotating directions of the two separation columns on the same side are different; and the rotating directions of the two separation columns on a cross position of different side are the same. According to the multi-column quadrature-axis countercurrent chromatograph, the unwinding of a flexible pipe is realized by virtue of a method of replacing an unwinding shaft with the separation columns, the rotating directions of the separation columns are differed by virtue of the transmission mechanism, and an unwinding pipe is independently unwound, so that the unwinding reliability is guaranteed; and the separation columns are mounted on the support frame through flange bearings and can be changed by detaching the flange bearings mounted on two ends of the separation columns, and therefore, the different types of the separation columns can be conveniently changed.

The invention relates to the technical field of membrane separation, and provides a dopamine-assisted modified hybrid composite forward osmosis membrane and a preparation method thereof. An aqueous solution containing inorganic salt and ethanol is used as a coagulating bath; the phase separation speed and the crystallinity of polyvinylidene fluoride are regulated and controlled, a polyvinylidene fluoride membrane surface with a micro-nano structure is constructed, the supporting membrane is endowed with large porosity and high specific surface area, rapid diffusion of a salt solution in membrane pores in the forward osmosis process is promoted, concentration polarization is reduced, membrane resistance is reduced, and the water flux of the forward osmosis membrane is increased; the preparation method comprises the following steps: simultaneously depositing a hydrophilic biomass material and ZIF-8 on the surface of the supporting membrane by utilizing the super-strong adhesion characteristic and multi-active functional groups of dopamine to construct a defect-free hydrophilic hybrid selective cortex and improve the salt rejection rate; ZIF-8 nano particles are generated in situ anduniformly dispersed in the cortex, so that the problem of interfacial compatibility of the hybrid material is solved, and meanwhile, a nano water channel is provided by a cavity in ZIF-8, so that thewater flux is improved while the salt rejection rate is ensured.

The invention relates to an amphoteric composite forward osmosis membrane. According to the amphoteric composite forward osmosis membrane, an adopted porous support membrane is a super-hydrophilic polyvinylidene fluoride membrane; a polyamide layer is formed on the porous support membrane, and a zwitterionic layer is formed on the polyamide layer. In the present invention, the zwitterionic layer is formed by amido groups through zwitterionic reaction; through cooperation with the super-hydrophilic characteristic of the polyvinylidene fluoride membrane prepared through water vapor induced phaseseparation, the strong hydration and the charging performance of a catechol derivative modified graphene oxide nano-water channel and the zwitterionic skin layer, the water flux of the composite forward osmosis membrane is greatly improved while a low back-mixing salt flux is kept.

The invention provides a composite nanofiltration membrane and a preparation method thereof. The composite nanofiltration membrane comprises a bacterial cellulose base membrane and a graphene oxide compound compounded to the surface of the bacterial cellulose base membrane. The bacterial cellulose base membrane is a diamine-modified bacterial cellulose membrane. The graphene oxide compound comprises graphene oxide and attapulgite dispersed between the graphene oxide layers. Compared with graphene oxide, the composite nanofiltration membrane ensures the retention rate and greatly improves the throughput of the nanofiltration membrane. The composite nanofiltration membrane is a self-supporting nanofiltration membrane with high mechanical strength.

The invention discloses an after-treatment method for increasing the flux of an ultra-filtration membrane. The after-treatment method comprises the following steps: after the ultra-filtration membrane is prepared and formed, carrying out solution impregnation on the ultra-filtration membrane, wherein the solution is an aqueous solution of one or more of tetrahydrofuran, N,N-dimethyl formamide, N,N-dimethyl acetamide, N,N-dimethyl acrylamide, N-methyl pyrrolidone, 2-methyl pyrrolidone, dimethyl sulfoxide, tetramethyl sulfoxide, sulfolane, pyridine, methyl pyridine, dimethyl pyridine, dioxane, acetonitrile, hexamethylene amide, morpholine, hydrochloric acid, sulfuric acid, sodium hydroxide and chloroform. The after-treatment method disclosed by the invention has the advantages that the interception rate is maintained, and simultaneously the flux is increased. The after-treatment process is easy to operate and relatively low in increased cost, and conforms to the development direction of high performance and low cost in the membrane industry.

The invention provides a compound check dam water and soil conservation method, and relates to the check dam water and soil conservation method. The invention aims to overcome different exposed disadvantages of an existing uni-structure check dam in controlling an eroded gully channel. The method comprises the steps that a plurality of stone check dams are laid along the eroded gully channel, andin half a year after the stone check dams are built, a willow check dam is laid on the upper stream of each stone check dam in the first spring or autumn. According to the compound check dam water andsoil conservation method, provided by the invention, the stone check dams and the plant check dams are combined organically; the stone check dams are on the down stream, and the plant check dams areon the upper stream; in half a year after the construction of the stone check dams, an upper stream section is silted into a siltation area by silt carried by runoff, and warp soil in the siltation area is fertile, is suitable for plant growth, is beneficial to the survival of the plant check dams, and improves preserving rate of the plant check dams; a revegetation problem in controlling the eroded gully channel is solved, and at the same time, the impact resistance of the downstream stone check dams can be relieved; and the water damage rate of the stone check dams is lowered. The compound check dam water and soil conservation method provided by the invention is suitable for water and soil erosion control of the eroded gully channels with serious water and soil loss in rolling hilly areas, low mountain and hill areas and the like.

An industrial cuttage method for cultivating sapling of dragon spruce in high-elevation region includes such steps as preparing cuttings nursery, string bags, matrix and nursing bed, disinfecting string bags, loading matrix in it, immersing in water, cutting to become matrix bags, treating the cuttings with hormone, inserting them in matrix bags, arranging them on the nursing beds, showering managing, and transplanting. Its advantages are short period, low cost, and high effect.

The invention discloses a carbon nitride modified Janus acid-resistant nanofiltration membrane as well as a preparation method and an application thereof. The preparation method of the carbon nitride modified Janus acid-resistant nanofiltration membrane comprises the following steps: immersing an ultrafiltration base membrane into a prepared water-phase solution for reaction, and drying to obtain an ultrafiltration base membrane I; immersing the ultrafiltration base membrane I into the oil phase solution for reaction to obtain an ultrafiltration base membrane II; performing heat treatment on the ultrafiltration base membrane II to obtain an ultrafiltration base membrane III; performing three-acid treatment on the ultrafiltration base membrane, and obtaining the carbon nitride modified Janus acid-resistant nanofiltration membrane. By adding the two-dimensional carbon material carbon nitride (C3N4), narrow, smooth and mutually communicated two-dimensional channels are provided, macromolecular substances are prevented from passing through, and the water molecule transportation resistance is reduced; a composite functional layer added with the two-dimensional carbon material C3N4 is firmly loaded on the surface of the ultrafiltration base membrane by adopting an interfacial polymerization method, and the flux of the nanofiltration membrane prepared by the method is remarkably improved on the premise of ensuring the acid resistance and the rejection rate of multivalent cations.

The invention discloses a spun yarn polished rod spindle, which comprises a rod-disc combination and a spindle base, and includes a yarn winding ring and a supporter, one end of the yarn winding ring is a positioning sleeve fitted on the spindle disk, and the other end of the yarn winding ring is One end is a winding bobbin; one end of the winding bobbin is provided with an end face circular platform connected to the positioning sleeve, the lower end of the yarn bobbin extends into the winding bobbin and the lower end surface of the bobbin contacts the end face circular platform, the The other end of the winding bobbin is provided with a blade; the supporter is set on the spindle rod above the spindle disk of the rod-disk combination; the invention not only has good working reliability, but also can realize the automatic collective doffing of the traditional short spinning machine , to solve the technical problems of high cost and low efficiency in manual doffing; and the manufacturing cost is low, which is suitable for mass production and processing.

The invention discloses a garment accessory sale box which comprises a base, wherein the base is horizontally placed on a floor; a rectangular frame is mounted at the top of the base; hinged doors are respectively arranged on four side surfaces of the rectangular frame; contact parts of the hinged doors and the rectangular frame are connected through hinges; tempered glass is horizontally placed at the top of the rectangular frame; L-shaped storage grids are fixedly mounted on one side surfaces of the hinged doors; baffle plates are fixedly mounted at openings of the L-shaped storage grids; rectangular storage grids are fixedly mounted at the bottom of the rectangular frame; and the rectangular frame is pivoted with the base through a chute. By adopting the garment accessory sale box, the demonstration area of the sale box is increased, and meanwhile the carrying rate of goods is increased; and people know that the larger the amount of goods carried by a dealer is, the easier the transaction is, the rectangular frame is reinforced, the main reason is that dealers need to travel around to sell goods frequently, then the quality of a sale box is highly required, for the same reason, the stronger the sale box is, the longer the service life of the sale box is, and the sale cost of a user is reduced.

The invention belongs to the technical field of Chinese herbal medicines, and discloses an anti-fatigue preparation and a preparation method thereof. The anti-fatigue preparation is prepared from monarch drugs of rhodiola rosea, Chinese olive and sea-buckthorn, and is sweet in taste and warm in nature; the effects of invigorating spleen, tonifying qi, clearing away lung-heat, relieving cough, promoting blood circulation and removing blood stasis are achieved; polygonatum sibiricum, wrinkled gianthyssop herb, orange peel and seville orange flower are used as ministerial drugs and have the effects of nourishing yin, moistening lung, tonifying spleen, replenishing qi, resolving turbidity with aromatics, nourishing blood, strengthening body and supplementing essential amino acids for human bodies, so that the oxygen content of in-vivo cells is increased; and mint, liquorice and spina date seed are used as adjuvant drugs for clearing head and eyes, soothing the liver, promoting the circulation of qi, replenishing vital essence, improving eyesight and regulating immunity. All the Chinese herbal medicines are mutually fused, and the nature and flavor of the Chinese herbal medicines are applied according to the symptoms, so that the effects of refreshing and restoring consciousness and increasing the oxygen content of body cells are achieved, the cerebral cortical layer cell viability is further improved, and the anti-fatigue purpose is achieved. The retention rate of effective components in the preparation is guaranteed in the preparation process, granules are convenient to take and have no toxic or side effect, and the content of the effective components in all the raw materials is lower than the mouse intragastric administration LD50 standard amount.

The invention discloses a micron-sized particle stacking compactness testing device and a testing method thereof, and belongs to the technical field of material science and engineering, and the testing device comprises a piston, an outer sleeve, a filter membrane, a stainless steel filter screen, a perforated sheet, a sealing washer, a perforated supporting assembly, a liquid storage assembly and a demolding device. According to the testing device, filtering media with pore diameters and strength from small to large are combined to form the filtering assembly, so that the maximum bearable stress is greatly increased while the rejection rate is ensured, and the application range is enlarged. The invention further discloses the testing method of the device, the close packing state of the particles can be accurately judged, and the packing compactness of the micron-sized particles can be tested. According to the testing device and the testing method, the problems that the influence of particle clusters cannot be completely eliminated, critical condition judgment is subjective and the like in an existing method are solved, accurate testing of the micron-sized particle stacking compactness is achieved, and prediction of the rheological property of a solid-liquid mixture, optimization of the proportion and even guarantee of the final quality of the product in actual engineering are facilitated.

The invention discloses a complex microbial inoculant as well as a preparation method and application thereof, belongs to the technical field of animal husbandry, relates to silage, and solves the problems that corncob silage is severe in dry substance loss and is low in fermentation quality. The complex microbial inoculant is prepared from lactobacillus rhamnosus ZXY7 with a preservation number of CGMCC NO.11849 and a preservation date of December 9, 2015 and pediococcus ethanolidurans NO.1 with a preservation number of CGMCC NO.11850 and a preservation date of December 9, 2015. The complex microbial inoculant can remarkably reduce generation of alcohol or volatile substances, is high in dry matter storage rate, and can be widely applied to other silages with high sugar content.