43results about How to "Does not change physical and chemical properties" patented technology

The invention relates to a detection method for the acute biological toxicity of drinking water contained in a plastic bottle, belonging to the technical field of drinking water detection. The method comprises the following steps: preparing a bacterial liquid used in tests from a fresh bacterial liquid or a bacterial liquid of freeze-dried powder, preparing a drinking water sample liquid, a control sample liquid, and a detection sample liquid for a plastic bottle, preparing a set of sample parallel samples by using the drinking water sample liquid or the detection sample liquid for the plastic bottle, then preparing a set of control parallel samples, adding 0.1 ml of fresh bacterial liquid or 0.05 ml of bacterial liquid of freeze-dried powder to each set of parallel samples, respectively placing for 15 min, determining the illumination intensity of one sample in each small test cup by a luminescence detecting device, and then calculating the relative illumination intensity. Compared with the prior art, the invention uses a freshwater luminescent bacterium peculiar to China, Vibrio-qinghaiensissp, as a detection strain, and the luminescent bacteria can grow and give out light without sodium chlorides. The invention has the advantages that the physical and chemical characteristics of the samples can not be changed, the correctness of the tests is ensured, and the detection speed is high.

The invention discloses a method for repairing heavy metal contaminated soil by nanometer zero-valent iron. The method comprises the following steps of: filling heavy metal contaminated soil in a fiberglass-reinforced column; introducing water until constant weight is obtained; and introducing nanometer zero-valent iron suspension liquid in the fiberglass-reinforced column to perform elution on the heavy metal contaminated soil. Through the adoption of the method disclosed by the invention, heavy metal with high toxicity in the soil can be eliminated or reduced once under the condition that the original ecological structure of the soil is not damaged, and secondary contamination of nanometer zero-valent iron and heavy metal desorption are avoided; and the method has the advantages of being simple in treating technology, low in cost and obvious in treatment effect.

The invention discloses spiropyran-based photo-thermal dual-responsive high-strength dual-network hydrogel and its preparation method and application. The preparation method comprises that poly(gamma-glutamic acid)glycidyl methacrylate is crosslinked to form a first network, the first network is swollen in a prepolymer solution containing ethyl 2-[1-acrylate-3', 3-dimethyl-6-nitro-spiro[indoline-2', 2-[2H-1]]-benzopyran]methacrylate and N-isopropylacrylamide until the swelling is complete, and the swollen product is taken out and is crosslinked to form the dual-network hydrogel. The dual-network hydrogel contains a photochromic spiropyran monomer and a temperature-responsive NIPAAm monomer so that the dual-network hydrogel has good mechanical properties, response to light and temperature stimulation, and a good application prospect in drug loading, biosensors and smart windows.

The invention relates to a water-based protective coating capable of adhering to a high temperature billet and a preparation method thereof, and belongs to the field of metal high-temperature protection. The water-based protective coating comprises main powder, 0-3wt% of an inorganic binder and 3-5wt% of a self-made additive. The main powder is prepared from natural raw materials such as clay, magnesite, diatomite, magnetite and metallurgy tailings. The self-made additive is a sol system comprising a surfactant and a Zn-containing component. The powder is subjected to ball milling so that particle sizes are less than 300 meshes, density of the slurry is adjusted to 1.2-1.5g/cm<3> and density is decreased with spray-coating temperature increasing. The water-based protective coating is suitable for spray-coating a billet having a temperature less than 1200 DEG C and heated in a heating furnace for 1-10h. The preparation method can realize adjustment and control of billet trace element distribution, does not change billet surface physicochemical characteristics and reduces a burning loss by more than 60%. The preparation method has active promotion effects of saving energy and reducing consumption in the metallurgy industry, improving steel quality and improving core competitiveness of a steel enterprise.

A compound medicine containing kurarinol, prostaglandic E1 and aspirin is prepared through including the kurarinol and prostaglandin E1 by 6-0-malto-beta-cyclodextrin, mixing, adding others, and preparing the freeze dried powder injection. It can be used for treating cancers, cardiovascular and cerebrovascular diseases and hepatitis. Its advantages are sure curative effect, and no toxic by-effect.

The invention discloses a method for ecological remediation of a side slope. According to the method, a reasonable material proportion of a spraying-seeding substrate is summarized on the basis of a lot of test data and project experience, so that the physicochemical properties of the substrate reach the best indexes required for the growth of plants; compared with highly-dispersive soil particlesformed by technologies of the same kind, the soil structure with rich pores is formed by means of the method, can achieve water retention and ventilation, slow down leaching loss of nutrient elements, and guarantee the good growth of root systems of the plants; sprayed artificial soil is small in density, low in unit weight, and large in internal friction angle, is easily attached to a steep slope, and is unlikely to be peeled off; compared with the technologies of the same kind, the spraying-seeding thickness can be obviously increased, and the long-term growth demands of the plants are met.Through the use of polyacrylamide, the effect of flocculating the solid substrate is achieved, so that the substrate sprayed on the slope surface is subjected to solid-liquid separation, clear wateris filtered out, and the loss of the solid substrate and nutrients is reduced; in the dewatering shrinkage process of the substrate, the solid substrate forms a granular structure with certain porosity, and thus the growth of the plants is better facilitated.

The invention discloses a remediation method for cadmium-nitrate combined pollution of facility agriculture soil. The remediation method comprises the following steps: (1) planting sedum alfredii hance in soil under remediation, regularly harvesting the sedum alfredii hance, and removing the sedum alfredii hance after harvesting twice or triple; (2) after removing the sedum alfredii hance, planting port-grown green-stem slim-leaf water spinach, and flooding the plants with water during growing; (3) after harvesting the port-grown green-stem slim-leaf water spinach, further planting Siyuebai pakchoi in the soil; and (4) repeating steps (1) to (3) until the soil is up to the standard. According to the remediation method for cadmium-nitrate combined pollution of facility agriculture soil, the rotation manner of a Cd-hyperaccumulator, a cadmium-nitrate low-accumulation aquatic vegetable, and a cadmium-nitrate low-accumulation terraneous vegetable is adopted, and the edible safety of the vegetables is guaranteed while the soil is remediated.

The invention discloses a passivator for repairing mercury-polluted soil as well as preparation and application thereof. According to an iron-sulfur-selenium loaded biochar material disclosed by the invention, ferrous sulfide and sodium selenite are taken as central substances, shaddock peel biochar subjected to anoxic high-temperature carbonization is taken as a carrier, and a method of loading iron-sulfur-selenium on biochar is adopted, so that the passivator for repairing mercury-polluted soil is prepared. The synthesized passivation material is added into mercury-polluted soil according to a certain proportion, standing is conducted for 30 days, the highest removal rate of TCLP and water leaching mercury in the mercury-polluted soil can reach 99% or above, and the exchangeable state, the carbonate binding state and the amorphous iron-manganese oxidation state in the soil are obviously converted into the organic binding state and the residue state. The iron-sulfur-selenium biochar material disclosed by the invention is simple in preparation process and low in cost, and can effectively reduce the mobility and bioavailability of mercury in soil.

The present invention discloses a compound injection in absolut ethyl alcohol or compound powdered injection preparation of prostaglandin E1, prostaglandin E1 potassium salt, prostaglandin E1 sodium salt or prostaglandin A1 and prostaglandin B1. The compound preparation is used in preventing and treating AIDS and abstaining from drugs. It has unique recipe, complementary components, determined curative effect and less toxic side effect.

The invention discloses an organic solid waste high-temperature carbonization and drying system with a waste heat utilization device. The organic solid waste high-temperature carbonization and drying system comprises a carbonization machine, a drying machine, a heat exchanger, a hot air unit, an air return unit, a dehumidifier and a tail gas processing device, wherein the carbonization machine is connected with the drying machine through a spiral conveyor; a distributor and a spiral discharger are arranged in the drying machine; the hot air unit is installed at the bottom of the drying machine; the air return unit is installed on the top of the drying machine; the carbonization machine is sequentially connected with the heat exchanger and the hot air unit through high-temperature gas ducts; the air return unit is sequentially connected with the dehumidifier, the tail gas processing device and the heat exchanger through air return pipes. Compared with the prior art, the organic solid waste high-temperature carbonization and drying system has the advantages that a great cost advantage is achieved, the physicochemical properties of materials are not changed at the drying temperature within 70 DEG C, and the value of the materials can be maintained; air is recycled after being dehumidified, so that the energy saving effect is more remarkable; moreover, no gas is exhausted, and secondary pollution is avoided.

The invention discloses a near infrared spectrometric method of iodine value of biodiesel. The iodine value of a detected sample is indirectly determined by using doubled-frequency absorption and combined frequency absorption of C=C and hydrogen group C-H vibrations in a grease to generate a spectrogram and using a partial least squares regression and optimal factor number selection principle factor regression method to make an iodine value measuring model. The near infrared spectrometric method of the iodine value of the biodiesel comprises the operation steps of (1) centrifuging a grease sample obtained in production to eliminate an impurity effect so as to prepare a sample to be detected; (2) putting the sample to be detected into a quartz cuvette, and using a lens wiping paper to wipea color through surface of the cuvette; (3) according to an original state of an instrument, selecting a pre-made iodine value measuring model for reference, placing the cuvette filled with the sampleto be detected into a sample cell to be scanned, and calculating the iodine value of the sample by using an iodine value measuring and analyzing model software after near infrared detection; and (4)taking out a test sample in the sample cell and recycling the test sample, washing the cuvette, and dipping the cuvette in absolute ethyl alcohol and drying the cuvette for future use. The near infrared spectrometric method of the iodine value of the biodiesel, disclosed by the invention, has the advantages of simple and fast operation, low cost, high accuracy and good applicability.

The invention discloses a purification treatment method for organotin-polluted seawater. The purification treatment method comprises the following steps of: step 1, filtering: filtering the organotin-polluted seawater by using a filter of 50-100 mu m; step 2, pumping the filtered seawater into an electric ultraviolet catalytic reduction system, wherein the system comprises a photocatalyst and an ultraviolet source, in the system, the seawater is in full contact with a photocatalyst material and is irradiated by ultraviolet light to carry out an ultraviolet photodegradation reaction and a photocatalytic reduction mineralization reaction, a mixture is kept for 60-240 seconds and is then exhausted safely, and the photocatalyst is a metal-oxide photocatalyst with a photocatalytic reduction function. The method provided by the invention has the advantage of safety, reliability, high efficiency, low energy consumption, thorough mineralization of organotin pollutants, no addition of chemical agent, no secondary pollution, no change of physicochemical property of seawater and environment friendliness, and can meet the demands of purifying and quickly restoring the organotin-polluted seawater, especially the seawater polluted by organotin in offshore cultivation farms.

The invention discloses a near infrared spectrometry method for neutral oil in the ester exchange production process of biodiesel. According to the near infrared spectrometry method, doubled-frequencyand combined-frequency absorption of vibration of glyceride hydric groups C-H and COO-H in grease is utilized to generate a spectrogram, a neutral oil measurement model is produced by partial least-squares regression and optimum-factor-number selection principle factor regression methods, and the neutral oil in a measured sample is indirectly determined. The near infrared spectrometry method comprises the operation steps of: (1) carrying out a centrifugal operation on a grease ester exchange process sample in the production to prepare a to-be-measured sample; (2) filling the to-be-measured sample into a quartz cuvette, and wiping the translucent surface of the cuvette clean with lens wiping paper; (3) selecting the preset neutral oil measurement model to carry out reference according to an original state of an instrument, then placing the cuvette with the to-be-measured sample into a sample pool to carry out spectrum scanning, and after near infrared detection, calculating content ofthe neutral oil in the sample by neutral oil measurement analysis model software; and (4) recovering the test sample after taking the test sample out of the sample pool, washing the cuvette and aftersoaking the cuvette with absolute ethyl alcohol, air-drying for later use. The near infrared spectrometry method is simple, rapid and convenient to operate, low in cost, high in accuracy and high in applicability.

The invention discloses a near infrared spectrometric method of an acid value in a biodiesel methyl esterification production process. The acid value of a detected sample is indirectly determined by using doubled-frequency absorption and combined frequency absorption of free fatty acid hydric group COO-H in a grease to generate a spectrogram and using a partial least squares regression and optimalfactor number selection principle factor regression method to make an acid value measuring model. The near infrared spectrometric method of the acid value in the biodiesel methyl esterification production process comprises the operation steps of (1) centrifuging a grease methyl esterification process sample in the production to prepare a sample to be detected; (2) putting the sample to be detected into a quartz cuvette, and using a lens wiping paper to wipe a color through surface of the cuvette; (3) according to an original state of an instrument, selecting a pre-made measuring model for reference, placing the cuvette filled with the sample to be detected into a sample cell to be scanned, and calculating the acid value of the sample by using an acid value measuring and analyzing model software after near infrared detection; and (4) taking out a test sample in the sample cell and recycling the test sample, washing the cuvette, and dipping the cuvette in absolute ethyl alcohol and drying the cuvette for future use. The near infrared spectrometric method of the acid value in the biodiesel methyl esterification production process, disclosed by the invention, has the advantages of simple and fast operation, low cost, high accuracy and good applicability.

The invention discloses a machining and cutting device for a new energy automobile flow guide plate. The machining and cutting device comprises a water knife and a collecting groove. A telescopic rodis welded to the top face of the water knife, and a sliding block is welded to the top face of the telescopic rod. The collecting groove is arranged below the water knife, and a conveying roller is arranged on the upper portion in the collecting groove. In the machining and cutting device, a self-priming pump and a water cooling pipe are arranged, water filtered by the collecting groove is conveyed into the water cooling pipe by the self-priming pump after being absorbed by a connecting pipe, the water cooling pipe surrounds the peripheral surface of a booster pump, and the water passes through the water cooling pipe to cool the booster pump; meanwhile, the water cooling pipe is connected into a water tank, filtered water is absorbed by the booster pump from the water tank and is conveyedby the self-priming pump to enter the water tank again after being used up and filtered by the collecting groove, and cyclic utilization of water resources is achieved; meanwhile, the circulating water is utilized for carrying out water cooling on the booster pump, water resources are saved, and meanwhile the work efficiency is improved; and the defect that a traditional water knife wastes a largenumber of water resources is remedied.

The invention discloses organic mulch for producing container-grown seedlings, and a use method of the organic mulch, belonging to the technical field of nursery stock production. The organic mulch is characterized by being mainly prepared from a bamboo fiber medium, river sand and slow release fertilizer, wherein the volume of the bamboo fiber medium accounts for 80-90% of that of the organic mulch, the volume of the river sand accounts for 10-20% of that of the organic mulch, and 3-5kg/m<3> of the slow release fertilizer is mixed into the organic mulch. Compared with other organic mulches, the organic mulch provided by the invention has the advantages that the use method is simple, the growth of most weed can be effectively inhibited, and the normal growth of plant seedlings (not including grass and flowers) is not influenced; the main components of the organic mulch can be naturally decomposed within 10-15 months, so that the organic mulch is suitable for producing the container-grown seedlings. The organic mulch can be used for effectively reducing the influence of a herbicide on the seedlings and environment, and reducing the cost of manual weeding.

The invention provides a slow-release fertile having insecticidal function special for lawn and a preparing process thereof. According to the weight percentage, the fertile contains 30% to 60% of peat soil substrate, 10% to 30% of tea seed extraction, 2% to 15% of coagulant, 0.5% to 10% of binder and 2% to 15% of chemical manure, wherein the coagulant is silicate; the binder is polyving akohol; and the chemical manure contains urea, potassium phosphate and magnesium sulfate. The preparing process comprises the steps of uniformly mixing the peat soil substrate, the tea seed extraction and the silicate, adding polyving akohol into the mixture, putting into a grinder, stirring, airing in the room till the water content is 60%, adding into the chemical manure, grinding, pressing and airing so as to obtain the finished product.

The invention discloses a hydrophobic magnetoelastic film-based programmable liquid drop moving system and a driving method thereof. The hydrophobic magnetoelastic film-based programmable liquid drop moving system comprises a coil group array, a supporting plate, a silicone rubber layer and a hydrophobic magnetoelastic film which are arranged on a fixed bracket from bottom to top, the coil group array is composed of a plurality of cylindrical coils and is vertically arranged in an array form; the supporting plate, the silicon rubber layer and the hydrophobic magnetoelastic film are horizontally laid from bottom to top and are arranged above the coil assembly array, and the hydrophobic magnetoelastic film is composed of a plurality of magnetized magnetic blocks embedded in the hydrophobic magnetoelastic film; one magnetic block is arranged right above each cylindrical coil, and one magnetic block is arranged at the midpoint of a connecting line of every two adjacent cylindrical coils in the transverse direction and the longitudinal direction; according to the system and the driving method thereof, the super-hydrophobic magnetoelastic film and the micro electromagnetic coil are adopted to realize programmable stable constant-speed movement of the liquid drops, the flexibility is high, the physicochemical properties of the liquid drops are not influenced, the tolerance to the characteristics of the liquid drops is high, and the driving method is simple, flexible and easy to control.

The invention discloses a high-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid and a preparation method thereof. Molybdenum disulfide is used as a raw material, ionic liquid crystal is used as an auxiliary agent, the raw material and the auxiliary agent are dispersed in deionized water according to a specific proportion, and a water-based high-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid is prepared by adopting an ultrasonic mode. The prepared molybdenum disulfide dispersion liquid can be stably stored for a long time at normal temperature, the preparation process is simple and efficient, the production period is short, and the method is suitable for large-scale production; and the molybdenum disulfide prepared by adopting water as a solvent has no residual organic matters on the surface, is low in production cost, environment-friendly and high in safety coefficient, does not destroy the crystal structure of molybdenum disulfide, and has a very high application value.

The invention discloses a high-concentration carbon nanotube slurry and a preparation method thereof, and solves the technical problem of poor stability of the carbon nanotube slurry in a water environment, the preparation method comprises the following steps: 1) mixing carbon nanotube powder and ionic liquid crystal in a mass ratio of (1: 1)-(5: 1), adding the mixture into deionized water, and fully stirring and uniformly mixing to obtain a mixed solution; 2) putting the mixed solution into a reaction kettle, and carrying out hydrothermal reaction at 150-250 DEG C; 3) taking out a product after the hydrothermal reaction to obtain high-concentration carbon nanotube slurry; the prepared high-concentration carbon nanotube slurry is high in concentration and good in dispersity, can be stably stored for more than 6 months for a long time under the condition of normal temperature, and has relatively high application value.