530results about How to "Reduce dehydration" patented technology

An ophthalmic device is disclosed that is a polymerization product of a monomeric mixture comprising (a) a major amount of a non-silicone-containing hydrophilic monomer; (b) a hydrophobic monomer; and (c) a crosslinking agent, wherein the ophthalmic device has an equilibrium water content of at least about 70 weight percent and further wherein the ophthalmic device has an evaporative dehydration barrier layer on the surface thereof. A method for the mitigation of evaporative corneal dehydration employing the high water content ophthalmic device is also disclosed.

The invention relates to an orange antistaling agent and is characterized in that the orange antistaling agent is made from components according to the following proportion relationship: 0.2-0.8g of a bactericide; 0.1-0.3g of p-chlorophenoxyacetic acid; 0.001-0.002 L of acetone; 2-5g of Tween 20; 10-20g of chitosan; and 1L of water. The orange antistaling agent provided by the invention can be used to effectively prevent oranges from being rotten during the storage period, prolong the shelf-life of oranges and raise the orange quality. In the meanwhile, the invention also provides a preparation method of the orange antistaling agent and a method for using and processing the orange antistaling agent.

The invention discloses a modularized integrated smoke purification system and method for removing a plurality of pollutants. The system comprises an absorption tower, wherein a smoke inlet is arranged in the lower end of the absorption tower; the absorption tower is internally provided with a spraying device which is located above the smoke inlet and is used for spraying an absorbent, a first wet-type electric precipitation device located above the spraying device, and a second wet-type electric precipitation device located above the outer side of the absorption tower; and a smoke uniform distributor is arranged between the first wet-type electric precipitation device and the second wet-type electric precipitation device. The invention further discloses a method for carrying out smoke purification by using the system; the pollutants existing in an aerosol form, including SO2, NOX, superfine smoke dust, SO3 acid fog, mercury and the like in the smoke, can be intensively removed; gypsum rain is prevented and an environment is protected; and the smoke purification efficiency is improved.

The invention discloses a method for preparing a high-nickel concentrate from a low-grade red soil nickel ore, which comprises the following steps of: drying the low-grade red soil nickel ore until water content is 13 to 16 percent, crushing to ensure that the size of all particles is less than 3mm, grinding by using a high-pressure roller mill to ensure that particles with the size of less than 0.074mm account for 80 percent and specific surface area is not less than 2,000cm<2> / g, adding 15 to 20 percent of composite binder and 1 to 5 percent of coal powder, and pelletizing by using a disc pelletizer to obtain green pellets with the size of 6 to 16mm; drying and preheating the green pellets on a chain grate for water removal and solidification to ensure that each piece of pellet entering a kiln has the compression strength of over 500N; directly adding the preheated and solidified pellets into a rotary kiln, and reducing at the temperature of between 1,100 and 1,250 DEG C for 60 to 120 minutes by using pea coal as a reducing agent in a mass ratio of the reducing coal to the pellets of 0.8-1.0; and cooling a reduction product, sieving, performing magnetic separation to obtain a magnetic product, crushing, grinding, and performing magnetic separation to obtain the high-nickel concentrate, wherein the composite additive comprises the following components: Na2CO3 and CaO, iron oxide powder, the coal powder and sodium humate in a ratio of (30-60):(20-30):(20-30):(5-10). The method is high in adaptability and nickel recovery rate and suitable for mass production.

The invention relates to a method for preparing barley maltsyrup by using wheat flour. The method comprises the following steps: after wheat gluten is extracted from wheat flour, screening obtained starch milk; concentrating the starch milk by a concentration separator; conditioning the starch milk; adjusting the pH value of the starch milk; introducing high temperature resistant alpha-amylase forspray liquefaction, laminar insulation and cooling on the starch milk; saccharifying the starch milk by saccharifying enzyme, and inactivating enzyme; adding flocculant and filter aid for filtration;decoloring the starch milk by adding activated carbon; filtering the starch milk to obtain clear filtrate; carrying out cation resin exchange and cathode resin exchange of the filtrate; reducing pressure and distilling the filtrate; inspecting quality of the filtrate; measuring and packaging the filtrate. The method solves the problems that the syrup cannot be filtered, and the finished product syrup has poor clarity in a process for manufacturing a finished product barley maltsyrup by using wheat A-type starch and B-type starch. The method saves rectification separation and drying processesof starch, and reduces the numbers of liquefaction times in sugaring, improves the syrup yield by 15 percent, has simple process and standard syrup quality, and reduces manufacturing cost and environmental pollution.

The invention provides a tackifier for a drilling fluid, and a preparation method and application thereof. The tackifier is a quadripolymer formed by polymerization of four alkene monomers, wherein the four alkene monomers are selected from a temperature-resistant salt-tolerant monomer, a hydrated monomer and an adsorptive monomer; the temperature-resistant salt-tolerant monomer is selected from an alkenyl sulfonic acid monomer; the hydrated monomer is selected from alkenyl carboxylic acid, alkenyl alkane ketone and double-bond-containing quaternary ammonium salt compounds; and the adsorptive monomer is selected from an alkenyl amide monomer. The tackifier provided by the invention can resist a high temperature of no less than 180 DEG C, is resistant to saturated salt, has remarkable tackifying effect, is low in toxicity and environmentally friendly, and can obviously improve the dehydration and wall building capability of the drilling fluid, thereby effectively reducing the dehydration. The invention solves the downhole complexity possibly caused by the fact that the drilling fluid system can not carry and suspend rock debris and thus can not clear boreholes in time due to reduced viscosity shearing force as a result of poor temperature resistance and salt tolerance of the tackifier in deep well, ultradeep well, horizontal well and extended reach well operations.

The invention relates to a low temperature and low hydration heat cementing concrete system used in the natural gas hydrate layer cementing field. The objective of the invention is to effectively reduce the heat release of the cement hydration, prevent the hydrate from decomposing because of large heat and reduce the harm of the hydrate to the cementing. The whole performance of the cement under the low heat release condition is improved by adding materials which can reduce the whole hydration heat release of the cement using G grade oil well cement as base material. (1) The proper addition of superfine slag with a specific surface area between 6000 and 12000cm2 / g can make sure the strength properties of the early and later stage of the cement. (2) The hydration heat is further reduced by adding fly ash with a lower hydration activity. (3) An amount of gypsum component is added so that the cement paste has certain expansion property at a low temperature to prevent the cement paste shrinking at a low temperature. The low temperature and low hydration heat cementing concrete provided by the invention has an obvious effect for reducing the whole cement hydration heat and a good effect for preventing the deep water hydrate decomposition.

The invention provides a fluid loss control additive for oleaginous liquids and oleaginous wellbore fluids containing the additive. The additive is the reaction product of a tannin compound, a polyamidoamine, a commercial lecithin, and an acid. The preferred tannins are derived from quebracho and wattle trees. The preferred acid is sulfuric acid. The preferred polyamidoamine is a long-chain fatty alkyl partial amide which is the reaction product of a polyalkylenepolyamine and a fatty acid containing from about 8 to about 30 carbon atoms, most preferably tall oil fatty acids, wherein at least one of the amino groups of the polyalkylenepolyamine is not amidated. The commercial lecithin contains from about 30% to about 50% of the vegetable oil from which the lecithin is concentrated, preferably soybean oil, and is present in the additive in an amount from about 1% to about 3% by weight, based on the weight of the tannin. Preferably the additive contains greater than 15% by weight of the polyamidoamine, based on the weight of the tannin.

A process and apparatus for preparing a dried food product said process comprising treating a dried food with an aqueous acidulant, in an amount and for a period of time which is sufficient to modify a surface of the food to increase water permeability; dehydrating the acidified food to obtain a desired moisture content with heat; cooling the heated dehydrated acidified food; and infusing the cooled dehydrated acidified food with an infusate.

The invention discloses a sectional type constant voltage and constant current charging method. The method comprises the following steps: determining an initial phase charging current I0 according to an optimal charging curve of a battery to obtain delta I; collecting an actual charging current Id and an actual charging voltage Ud of a storage battery in real time; judging the range of Id according to the detected actual charging current Id; outputting an charging current It of the current sectional constant current charging stage; judging the intensities of the current charging voltage Ud and the current charging current Id; and ending a charging process when the current charging voltage Ud is equal to a charge upper limit voltage U and the current charging current Id is equal to a minimum charging current Imin. The method forces the charging current to reduce exponentially in a sectional type mainly according to the optimal charging curve, thus achieving the purposes of shortening the charging time, reducing the water loss and gas evolution amounts of the storage battery, and prolonging the service life of the storage battery.

A cooling garment is disclosed that enhances the comfort of an exercising, working, or resting individual by reducing overheating, perspiration, dehydration, and electrolyte loss. A vascular distribution system delivers water to the garment, and evaporation cools the individual. Wetness can be concentrated where needed and moderated by water absorbent materials such as gel polymers. Water flows under gravity, by capillary action, pumping, or air pressurization. The garment can include inner layers that improve comfort, absorb perspiration, keep the individual at least partly dry, and / or include metallic and / or polymeric and / or other materials that conduct heat. Cooling can be enhanced by garment texture that increases evaporative surface area. Water can be chilled before it is delivered to the fabric, and ports can be included to allow a water bottle or other water source to be temporarily connected, and / or allow the individual to drink the water and / or pressurize a water container.

The invention relates to a pesticide adjuvant, comprising fat and oil. The fat and oil can be animal fat, vegetable oil or the mixture of them. The invention enhances the penetrability, stick-ability and blocking prosperity for pesticide of preventing disease and insects for branch and root during its producing process, which increases the preventing effect for disease and insect on branch and root. Mixed with pesticide or used individually to spray onto branch and root, the adjuvant can not only prevent disease and insect, but also can insulate cold, reduce water loss and promote tissue assimilation.

The invention belongs to the technical field of artificial pollination of fruit trees, specifically relates to a pollen suspension liquid for liquid pollination of fruit trees, and a preparation method thereof. The pollen suspension liquid mainly comprises the following components, by weight, 0.005-0.02% of boric acid, 0.005-0.01% of calcium nitrate, 0.01-0.02% of sodium carboxymethyl cellulose, 0.2-0.4% of pollen, and the balance of water. The pollen suspension liquid provided by the present invention can be placed for a long time, and can be prepared into a concentrated solution. In addition, the pollen suspension liquid provided by the present invention is easy to use, and can be directly sprayed on pistillate flower in a flowering stage to carry out the artificial liquid pollination, such that the fruit set percentage of the fruit trees can be more than 48%.

The invention provides a grafting method of an ornamental elm. Scion used in the operation process is treated by 2% cross-linked chitosan solution before storage, so that the fresh-keeping effect of the scion is improved and the stored scion has higher activity; when a rootstock is cut, the section of the rootstock is formed a 15-degree angle with limb, so that the separation of cortex and xylem is more favorable, and the grating efficiency is increased; when the scion is cut, two faces are long cutting faces, so that the contact area between the rootstock and a scion forming layer is increased, and the combination of the rootstock and the scion is more firm; moreover, since the grating method provided by the invention is fast in speed and high in efficiency, the water loss of the rootstock and the scion is less, and the oxidation and browning degree of the incision is low, so the survival rate of the graft can be greatly improved, and the survival rate of the graft is above 95%. The grating method of the ornamental elm provided by the invention is simple and easy to carry out; the ornamental elm grafted by the method can grow fast and shape rapidly, the crown size in the current year can reach above 1.2 m; the ornamental elm can be transplanted in the same year for grafting, thus, the grafting method is a garden and horticultural technique with stronger practicability.

The invention relates to well-cementing and self-healing cement slurry for an oil-gas field, which is suitable for the field of oil well cementation. The well-cementing and self-healing cement slurry comprises the following additives percentage by weight: 2-4% of fluid loss agent, 5-40% of self-healing component, 0.2-1.0% of stabilizing agent, 0.5-2.0% of dispersing agent, 0.3-1.0% of de-foaming agent, and 0.03-0.5% of retarding agent by taking the weight of cement as benchmark. A preparation method of the well-cementing and self-healing cement slurry is as follows: controlling the water cement ratio to be 0.44, uniformly mixing the additives at a low shearing speed, weighing a certain amount of cement, adding into slurry preparation liquid, and mixing with API (American petroleum institute) standards to obtain the well-cementing and self-healing cement slurry. The well-cementing and self-healing cement slurry has the characteristics of low water loss, adjustable thickening time, gas channeling prevention and excellent impervious performance and the like, has the functions of crack prevention and self healing, and remarkably improves the mechanical property of the cement.

The invention discloses a method for charging a battery of an electric road vehicle. The method comprises the following steps of: (1) pre-charging; (2) A-period constant current charging; (3) B-period constant current charging; (4) constant voltage charging; (5) double-threshold charging; and (6) float charging, wherein the base number of the charging environment temperature is 25 DEG C, current and voltage in the whole charging process are adjusted in inverse proportion to the environment temperature, a current adjustment coefficient is 30 to 80 mA / DEG C, a voltage adjustment coefficient in the step (6) is 3 to 4 mV / monomer.DEG C, and a voltage adjustment coefficient in other steps is 5 to 6 mV / monomer.DEG C. By adjusting charging parameters under different temperature conditions, a charging effect of the battery at different temperatures is ensured, and the service life of the battery is prolonged.

The invention provides a skin barrier repairing complex, facial cream and a preparation method therefor. The skin barrier repairing complex comprises a composition for repairing skin barrier, hydroxylasiaticoside, deacidified carnosine, a glycyrrhiza inflata root extract, a radix scutellariae extract and a hamamelis extract, wherein the composition for repairing skin barrier comprises sea fennelcallus culture filtrate, Ectoin and a hydrolyzed red alga extract. The skin barrier repairing complex can achieve triple effects of simultaneously repairing cutin barrier, repairing immunologic barrier and strengthening microbiologic barrier; and the facial cream prepared from the skin barrier repairing complex is obvious in repairing effect and can be used for effectively improving hydrature of skin, increasing the content of hyaluronic acid in the skin, improving photoaging, helping cell saccharification reversing and reducing fine grain area.

The invention discloses a flue gas desulfurization process and a device adopting acetylene sludge-gypsum method. The process comprises the following steps that acetylene sludge is utilized as a desulfurizing agent to carry out wet desulphurization to fuel gas to obtain pure smoke; the process in characterized in that the acetylene sludge is subjected to pulping so as to obtain an acetylene sludge solution, part of clean smoke is agitated into the acetylene sludge solution to carry out bubbling reaction, the acetylene sludge is preprocessed, and the acetylene sludge solution after preprocessing is utilized as the desulfurizing agent to carry out spraying desulfuration through rotational flow separation edulcoration. The device comprises an absorption tower, a circulating pump, a chimney and an outlet smoke channel arranged between the absorption tower and the chimney, as well as a serous fluid preprocessing tank which is internally provided with a bubbling layer and a rotational flow separating device which is connected with the serous fluid preprocessing tank and the inlet of the circulating pump, wherein the bubbling layer is communicated with the outlet smoke channel. According to the invention, the smoke after purification is preprocessed through the acetylene sludge, the quality of the desulfurization gypsum is improved, and the industrial cost is low.

The present invention relates to a lubrication blocking agent used for drilling fluid comprising the following raw materials in parts by weight: 20 to 40 parts of water, 3 to 8 parts of bentonite, 20 to 30 parts of a lubricant, 1 to 3 parts of a stabilizer, 20 to 40 parts of bitumen, 1 to 5 parts of a bitumen modifier, 0.1 to 1 part of a PH adjusting agent, 2 to 4 parts of an antifreeze, 2 to 4 parts of a surfactant, and 1 to 3 parts of a defoamer. Compared with the prior art, the beneficial effects are that: (1) the lubrication blocking agent can effectively improve drilling fluid system deformable particle content, and has good ability to block rock stratum, especially shale stratum prone to collapse, deep stratum prone to collapse, salt gypsum mud complex formation and other formations, and has good ability to block 10mum microcracks; (2) the applicability is good, the lubrication blocking agent can be compatible with a variety of drilling fluid processing agents, and can be widely used in fresh water, sea water and high concentration brine drilling fluid systems; (3) the lubricity is good; (4) the lubrication blocking agent has the role of filtrate loss reduction; and (5) and the lubrication blocking agent is easy to use and short in preparation period.

The invention belongs to the technical field of fresh keeping agents, aims to develop a composite fresh keeping agent including microorganism derived effective components and plant derived effective components, is used for fresh keeping and corrosion resistance for picked fruits and picked vegetables, and provides a microorganism and plant derived composite fresh keeping agent for fruits and vegetables. The composite fresh keeping agent is prepared from a component A and a component B, wherein the component A consists of microorganism fermentation fluid and a propolis extract, and microorganisms are bacillus amyloliquefaciens Lh-1, candida intermedia and cryptococcus laurentii; and the component B consists of plant derived effective component mixed liquor and film forming liquor, wherein the plant derived effective component mixed liquor is prepared by mixing a tree peony bark water extract with a citrus peel alcohol extract, a rabdosia rubescens alcohol extract, a radix zanthoxyli water extract, a lycium ruthenicum alcohol extract, a Chinese herbaceous peony water extract, a clinopodium chinense alcohol extract and a citronella water extract, and the film forming liquor is prepared by mixing konjac glucomannan with chitosan. Through the adoption of the composite fresh keeping agent, the fruits and the vegetables are furthest prevented from mildewing and rotting, the effects for preventing the fruits and the vegetables from postharvest diseases are enhanced, the moisture dissipation of the fruits and the vegetables is reduced, the storage time of the fruits and the vegetables is prolonged, and a certain economic value is created.

The invention relates to a natural antifreeze agent, in particular to an antifreeze agent for preventing the protein from being denatured during the freezing storage process of frozen peeled shrimps. The provided antifreeze agent is sodium alginate, the sodium alginate has the effects of retaining the moisture of the food and reducing the dehydration of the frozen peeled shrimp after being defrozen, and meanwhile, the frozen peeled shrimps taking the sodium alginate as the water glaze can maintain high stability on texture of both the raw and cooked peeled shrimps.

The invention discloses a storage battery charging method, which comprises the following steps of: measuring the temperature of a storage battery, calculating a limiting voltage, judging whether to enter a limiting voltage charging stage or not, and after entering the limiting voltage charging stage, judging whether the charging of the battery is finished or not according to time integration power and time integration current. The method has the advantages that: in the initial stage of cycle life of the storage battery, in the constant voltage charging stage of the battery, the charging current of the battery is exponentially normally reduced; the time integration charging power and the time integration charging current related in the charging method hardly produce influence on the charging of the battery, and ensure the battery can be normally sufficiently charged; by the charging method provided by the invention, the limitations of the time integration charging power and the time integration charging current force the charging limiting voltage to be exponentially reduced and force the charging current to be reduced to reduce water loss, prolong the service life and completely eradicate the occurrence of battery charging thermal runaway phenomena.

The invention relates to a process for preparing drilling fluid, in particular to a process for preparing the drilling fluid for preventing polycrystalline diamond compact (PDC) bit balling. The process comprises a construction process and a dosage formula of treating agents and is characterized in that: according to the dosage formula, the treating agents are prepared by mixing clear water polymer original slurry, poly anionic cellulose (PAC), calcium carbonate (QS-4), carboxymethyl starch (CMS), sulfonated phenolic resin(SMP-2), water dispersible cation emulsified asphalt powder (SFT-1), sodium chloride(NaCL) and sodium formate (WT-1) in a mass ratio of 1,000:2-3:30-40:20-30:2-3:1.5-2:50-100:20; and the construction process comprises the following steps of: according to a circulation circle, uniformly mixing a coating agent PAC, a filtrate reducer CMS, a salt and high-temperature resistant filtrate reducer SMP-2 and an anti-sloughing lubricant SFT-1 for 12h at first; adding QA-4, NaCL, WT-1 into the mixture and uniformly mixing the mixture; and regulating the mixture to have a density Rho of 1.06 to 1.10g / cm<3>, a funnel viscosity T of 38 to 45s and an API water loss FL of 4 to 6ml. The process has the advantages of effectively preventing the balling of a sticking bit and a PDC bit at a lower curved section, reducing a frictional resistance and a torque, eliminating a sticking phenomenon, improving a mechanical drilling rate and ensuring downhole safety.

The invention discloses a vegetable and fruit coating preservative. The preservative comprises pullulan, sodium carboxymethylcellulose, sucrose ester, cyclodextrin, natamycin and the balance of water; the preservative is prepared by using natural materials as main materials; compared with the prior art, the preservative has the advantages that: because the adopted raw materials are natural macromolecular polysaccharides, the preservative has good water solubility, is edible and nontoxic, has good film forming property, is a degradable material and does not produce environmental pollution; after the preservative is used, the average weight loss ratio is reduced by about 10 percent, the appearance of vegetables and fruits is improved, and the glossiness of the fruits is improved; propagation of bacteria at the storage period can be effectively inhibited, and the rotting rate of the fruits is reduced by 15 to 30 percent; and the preservative is simple in preparation method and simple andconvenient in use, can be used with a method of low-temperature storage, air-conditioning storage or the like, and has remarkable effect. The preservative has the effects of reducing water loss of the fruits, reducing the respiratory rate of the fruits and keeping the surfaces of the fruits smooth and attractive, and is particularly suitable for storage and fresh keeping of vegetables and fruits such as oranges, apples, strawberries, jujubes, plum tomatoes and the like.

The invention relates to a pulse charging method used for prolonging VRLA battery service life. The invention aims at provides a pulse charging method used for prolonging VRLA battery service life, such that the service life of a valve-regulated lead acid battery is prolonged. The invention adopts a technical scheme that, a VRLA battery has an output voltage of U and a capacity of C. The method is characterized in that the method is preceded in three sections which are a section A, a section B, and a section C. In the section A, constant-current charging is carried out with a charging limited current I. In the section B, periodic-change charging is carried out with constant current of the limited current I and constant-voltage of a second charging voltage U2. In the section C, periodic-change charging is carried out with constant-voltage of a first charging voltage U1 and constant-voltage of the charging voltage U2. In the section A, when a voltage is increased to U1, the process turns to the section B. In the section B, when the battery is charged to almost full, the process turns to the section C. The invention is suitable to be used in a field of storage battery charger.

The invention discloses an efficient photovoltaic charge control method for an independent photovoltaic generating system, comprising the three stages of MPPT (maximum power point tracking) charge, constant-voltage charge and floating charge: stage one: using an MPPT method to quickly charge a storage battery, carrying out once power judgment every other continuous five disturbances, and realizing the exact power tracking under the condition of quick changes of environment conditions; stage two: using lifting charge and equalizing charge to supplement the electric energy of the storage battery in the normal and overcharging states respectively; and stage three: maintaining the full electric energy of the storage battery. In the method, the charge states are managed effectively, the chargeefficiency is improved, and the service life of the storage battery is prolonged.

The invention discloses a sludge treatment system, comprising a sludge collecting tank, a sludge regulating pool, a sludge thermal hydrolysis device, a heat exchanger, an anaerobic reaction device, a sludge dewatering device and a sludge drying device, which are sequentially connected. The sludge treatment system also comprises a gas storage tank and a biogas boiler, wherein the input end of the gas storage tank is connected with the exhaust end of the anaerobic reaction device; the fuel input end of the biogas boiler is connected with the output end of the gas storage tank; the output end of the biogas boiler is connected with the sludge thermal hydrolysis device; the discharge end of the sludge dewatering device is connected with the input end of the sludge regulating pool. The invention also discloses a sludge treatment method. The sludge treatment method comprises the following steps: 1) collecting a sludge material and diluting by water; 2) hydrolyzing the diluted sludge material at high temperature; 3) carrying out anaerobic digestion on the sludge subjected to thermal hydrolysis to obtain biogas and digested sludge; 4) collecting the biogas; 5) dewatering and drying the digested sludge to obtain a sludge product. Reclamation, harmlessness, minimization and stabilization of sludge treatment are achieved by the steps and method.

The invention discloses a concrete anti-freezing and anti-cracking agent. The concrete anti-freezing and anti-cracking agent is formed by mixing 95 parts by weight of hydrophobic modified mica powder with 5 parts of nano silicon dioxide. Hydrophobic modified mica is prepared by a method comprising the following steps: first step, drying white mica or bronze mica; step two, pulverizing the white mica or the bronze mica into flaky micro-powder of which the granularity is 80 mu m, the screen residues are 15% or below and the thickness is 2.5 mu m; and third step, after mixing a silane coupling agent, methylsilicone oil and white mica powder or bronze mica powder which is prepared in the second step according to a formula, carrying out modification treatment on the mixture at the temperature of 150 DEG C, and the pulverizing the mixture to obtain the finished hydrophobic modified mica powder. The shrinkage of the concrete added with the anti-freezing and anti-cracking agent is greatly reduced, and the anti-cracking property is greatly improved.

The invention belongs to the technical field of edible fungus processing and relates to a preparation method of white mushroom slices. In the method, fresh white mushroom is used as a raw material; and the white mushroom slices are prepared by pretreatment, slicing, soaking, preserving color, killing green in microwaves, cooling, quickly freezing and refrigerating. The white mushroom slice products prepared by the method have natural color, full structure, less moisture loss, less nutrient loss, cooking effect similar to that of fresh white mushroom.

A slurry used for running sand layer of horizontal positioned drilling is prepared from alta-mud, collapse-proof agent, polyacrylamide, dehydration reducing agnet, sulphonating Arcolite, lubricant and water. The prepared slurry can prevent drilled hole from collapse and driller from seizing-up in course of horizontal positioned drilling.