52results about How to "Fast digestion" patented technology

The present invention provides methods, compositions and kits for isolating and purifying at least one nucleic acid directly from a biological sample, or for preparing a biological sample for subsequent isolation and purification of at least one nucleic acid, without removal of the biological sample's cell culture medium or cellular fluid.

The invention discloses a pretreatment method for determining multiple heavy metal elements in soil simultaneously. The pretreatment method comprises steps as follows: step (1): sample weighing: the soil is air-dried, ground and screened with a nylon sieve, a soil sample is weighed and put into a microwave digestion tube through a polytetrafluoroethylene long-neck funnel, and the funnel is slightly flapped before the funnel is removed so that all the soil sample attached to the wall of the funnel enter the digestion tube; step (2): digestion: nitric acid, hydrochloric acid and hydrofluoric acid are added to the digestion tube, a cover is screwed down, and the digestion tube is put into a microwave digestion instrument for digestion; step (3): acid driving: after microwave digestion is finished, hydrogen peroxide is added to the digestion tube; then the microwave digestion tube is put into a temperature-controlling acid driver in a fume cupboard for direct acid driving until the volume is smaller than 1 mL, then a solution is directly transferred to a volumetric flask, the volume is constant, and a to-be-tested solution is obtained. With the adoption of the pretreatment method, the digestion speed of the sample can be increased, the pre-treatment step of the sample is simplified, and the accuracy of the detection analysis result is guaranteed.

The invention discloses a high-volume phosphogypsum composite stable roadbed material and a preparation method thereof, and belongs to the technical field of highway construction materials. The roadbed material comprises the following components by weight percentage: 90-95% of phosphogypsum, 1-6% of a curing agent, 1.5-4% of a curing accelerator and 2-4% of water; the curing agent comprises Portland cement, superfine steel slag powder and blast furnace slag powder; the curing accelerator comprises water glass and a cationic styrene-acrylic emulsion. Through the synergistic effect of all the components of the curing accelerator, soluble P and F in the phosphogypsum can be effectively cured, early hydrolysis is promoted, the gelling activity of the phosphogypsum with the Portland cement andthe like is enhanced, an electronegative product generated in the modification process can be chemically bonded with cationic styrene-acrylic emulsion, the binding power between the raw materials is enhanced, and the mechanical strength of the material is improved; and secondly, under the bridging action of the electronegative product, the cationic styrene-acrylic emulsion can be firmly coated onthe surface of the phosphogypsum and the like to prevent the phosphogypsum from being dissolved in water, thereby enhancing the water stability.

The invention discloses a method of determining mercury in soil through a water bath digestion-atomic fluorescence method. The method is characterized by comprising the first step of preparation of a test substance solution, the second step of preparation of a standard substance solution, the third step of drawing of a standard curve and the fourth step of detection of test substances, wherein an appropriate amount of supernate of the test substance solution and sample blank are taken and placed into a clean colorimetric tube, and the colorimetric tube is placed in an automatic sampler of an atomic fluorescence spectrometer for detection of mercury content. Through the method of determining mercury in soil through the water bath digestion-atomic fluorescence method, operation is easy and convenient, sensitivity is high, detection time is short, and soil samples can be detected quickly in batch.

Waste-processing and transportation systems and methods are described. An exemplary waste processing and transportation system (10) comprises a receiving area (20) where loose waste (28) is delivered, a baler (22) for processing the loose waste (28) into waste bales (34), and a loading area (26) where the waste bales (34) are loaded onto a transport vehicle (e.g., a barge 36). A loader (32a) may operate in the receiving area (20) to load the loose waste (28) into the baler (22). At least one material handler (42a) may be configured to move the waste bales (34) onto the transport vehicle (36) for transport to a waste transfer facility (14). The waste bales (34) are configured such that the waste bales are unloaded from the transport vehicle (36) at the waste transfer facility (14) and loaded onto other transport vehicles (e.g., railcars 38) without further processing of the waste bales (34).

The invention relates to a method for detecting molybdenum element in milk powder. The used equipment is an inductively coupled plasma atomic emission spectrometer. The method has the following steps of: 1) preparing molybdenum element standard solution and making a standard curve according to the standard solution; 2) oxidizing a milk powder sample to be tested by using peroxide, performing acid treatment by using nitric acid, digesting in a microwave digestion system, and detecting by using equipment parameters same as the standard solution to obtain a detection result of the sample to be tested; and 3) comparing the detection result of the sample to be tested with the standard curve to determine the content of the molybdenum element in the sample to be tested. The instrument detection limit of the method is 0.0071 mu g/ml, and in an element linear range, the related coefficient r is over 0.999, and the recovery rate is 92.0 to 101.8 percent. The method can quickly and accurately detect the content of the molybdenum element in the milk powder, and has the advantages of low element loss and pollution probability in the sample preparing process, accurate and reliable result, good repeatability and high sensitivity.

The invention, which relates to the technical field of COD content detection, discloses a method for detecting the COD content in water by an instrument. The method comprises the following steps that:step one, test building is performed; to be specific, an instrument detects the COD content in water by using a measuring method that uses potassium dichromate as an oxidant, silver sulfate as a catalyst, a mercury sulfate as a masking agent for chloride ions and measurement of a COD digestion system as the base under the acidic condition of sulfuric acid; step two, a rapid digestion spectropho-tometry method is performed; to be specific, a sealing tube is used as a digestion tube, a small number of water samples and reagents are placed in the sealing tube, the sealing tube is placed in a small constant-temperature heating container and then constant-temperature heating and digestion are performed, and a COD value is determined by the spectrophotometry method. According to the invention,the method has advantages of small occupied space, low energy consumption, and small reagent amount and the like; defects of large equipment occupied space, high energy consumption, and large reagentdosage of the existing COD content detection method are overcome; and problems are solved by the method for detecting the COD content in water by an instrument.

The invention discloses a resource-saving low-carbon cement clinker and a preparation method thereof, and belongs to the technical field of Portland cement clinker production. The cement clinker comprises the following raw materials in percentage by mass: 45-70% of high-calcium low-magnesium limestone, 10-40% of barren rock, 4-12% of shale or sandstone, 4-12% of slag, 1-3% of sulfate slag or iron slag, 1-3% of fly ash, 0-3% of coal cinder or coal gangue, 0.5-3% of phosphorus slag and phosphogypsum and 0.1-0.3% of an added activating agent. According to the resource-saving low-carbon cement clinker and the preparation method thereof of the invention, a large amount of solid waste is utilized, the adopted industrial waste residue is formed by high-temperature calcination, carbonate hardly exists, and CO2 hardly occurs after high-temperature calcination is performed again; the mixing amount of the industrial waste residues is high, the use amount of limestone is greatly reduced; the mineralization of trace elements in the industrial waste residues is utilized, and the activating agent is added, so that the burnability of the raw materials is improved, the sintering stability of the clinker is reduced, and the performance of the clinker is improved; the firing temperature of the low-carbon cement clinker is reduced by 100-150 DEG C compared with the firing temperature 1450 DEG C of traditional Portland cement clinker, and therefore, the coal consumption is obviously reduced, and the emission of CO2 is reduced.

The present invention discloses effervescent tablets for effectively relieving labor pains, more particularly discloses the effervescent tablets which can quickly replenish energy, relieve fatigues, relieve maternal anxiety, irritability, tension and other bad mood and pains, and belongs to the technical fields of solid drink and special dietary edible food processing. The effervescent tablets are characterized by consisting of the following components in mass percentages: 25-35% of crystalline fructose, 5-15% of xylitol, 20-30% of sodium bicarbonate, 25-35 % of citric acids, 2.5-5% of medium chain triglycerides, 0.5-5% of gamma-aminobutyric acids, 0.4-4% of tea leaf theanine, 0.11-0.14% of taurine, 0.0022-0.008% of pantothenic acid, 0.0009-0.0022% of vitamin B1, 0.0009-0.0022% of vitamin B2, 0.0009-0.0022% of vitamin B6, 1-5% of an adhesive, and 0.1-0.5% of a lubricant. The advantages and beneficial effects are that the present invention also prepares the effervescent tablets which are good in stability, short in disintegration time, and strong in interestingness. The effervescent tablets can rapidly form even solution in water, can be consumed in an oral and sucking manner, can also be chewed, are easy to take, at the same time combine the both advantages of the tablets which are convenient for storage and carrying, can be consumed normally, and will not bring harms, and toxic and side effects to the body.

The invention relates to the technical field of mud hardening treatment of an empty pile section, and discloses a curing agent for mud hardening treatment of an empty pile section, a preparation method and a construction method. The curing agent includes an efficient structural agent and an admixture. The efficient structural agent and the admixture are blended with water to form curing slurry. The efficient structural agent is stirred, then the admixture is added and stirred, then water is added and the mixture is stirred to form the curing slurry, achieving preparation. Through multi-stage stirring, cured bodies and water are mixed more thoroughly; conveying compressed air and curing slurry to the empty pile section so that the curing slurry and waste mud are stirred and mixed, achievinghardening treatment. Through multi-stage stirring, components of the curing agent are mixed more thoroughly. By adoption of the curing agent, the hydration reaction degree is higher, the curing speedis higher, high-water-content mud in construction can be consumed rapidly, hidden safety risks caused by long-term stacking can be prevented, efficient resource utilization is achieved, and strengthof cured soil is higher and meets the bearing capacity of foundation soil.

The invention relates to the technical field of capsule production, and particularly relates to a preparation method of a donkey penis edible collagen peptide-gelatin composite capsule wall material.The preparation method comprises the following specific steps of: preparing donkey penis collagen peptide, preparing gelatin liquid and preparing the donkey penis edible collagen peptide-gelatin composite capsule wall material. Donkey penis collagen polypeptide is obtained through treatment of a biological enzyme preparation, can be digested within 3 hours and is high in digestion speed, the molecular weight of the donkey penis collagen polypeptide can be smaller than or equal to 3000Da, the donkey penis collagen peptide and edible gelatin are reasonably matched, active ingredients of collagenare reserved, and the donkey penis collagen peptide can be shaped for different purposes. In addition, the donkey penis collagen peptide has good effects of tonifying kidney, strengthening body and strengthening tendons and bones, the edible gelatin is also beneficial to digestion of food, and the donkey penis collagen peptide and the edible gelatin are combined to further strengthen respective effects.

The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a soil conditioner by using ardealite as a raw material through high-temperature calcination, wherein particles formed by calcined ardealite granulation are utilized, volatile substances in the particles continuously escape outwards to form pores, the air permeability and the permeability of the soil conditioner are enhanced, by supplementing fresh ardealite and blending, the content of free nutrients is increased, the free nutrients can be adsorbed, and the purposes of supplementing nutrients to crops and increasing the yield of the crops are achieved.

The invention provides a method for jointly measuring phosphorus in soil through high-voltage digestion and an inductively coupled plasma spectrometer, and relates to the technical field of environmental monitoring. According to the method, the high-pressure digestion and the inductively coupled plasma spectrometer are combined to determine the content of phosphorus in the soil. According to the invention, the digestion process is carried out in a pressure cooker, the high-pressure digestion has the advantages of high digestion speed, controllable reaction temperature and reaction time, no need of personnel on duty, low operation difficulty and difficulty in phosphorus loss under closed conditions, and the accuracy of a measurement result is improved while the operation is simple and convenient; the digestion process is carried out in a closed container, so that toxic and harmful substances cannot be released due to the reaction between the soil and aqua regia, and the harm to analystsand the environment can be effectively avoided. The calibration curve used in the method is a working curve, and compared with a standard curve, the interference of a matrix on an analysis result canbe effectively avoided, so that a measured value is closer to a true value.

The invention discloses a rapid harmless emergency treatment method of enteromorpha. The rapid harmless emergency treatment method of enteromorpha comprises the following steps of 1, collecting enteromorpha, 2, transporting the collected enteromorpha to an emergency storage, 3, carrying out aerobic composting treatment on the collected enteromorpha, and 4, carrying out emergency landfill treatment on the enteromorpha which is not subjected to the aerobic composting treatment, wherein the emergency landfill treatment comprises the following steps of A, carrying out seepage prevention treatmenton the bottom of an emergency landfill through the processes of orderly laying a clay membrane lower seepage-proof protection layer, a high-density polyethylene (HDPE) geomembrane and a nonwoven geotextile membrane upper protection layer on a base of the emergency landfill, B, transporting enteromorpha to the emergency landfill, and laying an enteromorpha layer on the emergency landfill subjectedto the seepage prevention treatment, and C, carrying out closure covering treatment on the enteromorpha layer. In the invention, aerobic composting treatment on enteromorpha needs low costs of capital construction and operation; an end product is compost; and resource recovery is realized. The rapid harmless emergency treatment method of enteromorpha can carry out simple and efficient emergency landfill treatment in the case of insufficient enteromorpha aerobic treatment capabilities, combines with aerobic composting treatment on enteromorpha, and is very suitable for emergency treatment carried out in large-scale outbreak of algae such as enteromorpha and the like.

The invention discloses an ash residue treatment method and an autoclaved brick manufacturing method, relating to the technical field of catalytic coal gasification and aiming at solving the problem of very low comprehensive utilization ratio of useful components in ash residue. The ash residue treatment method comprises the step of treating the ash residue to be treated by using a digesting agent and washing liquor. The autoclaved brick manufacturing method comprises the steps of pressing the ash residue treated by the ash residue treatment method into an autoclaved brick green body, and carrying out steam press maintenance on the autoclaved brick green body to obtain an autoclaved brick. The ash residue treatment method and the autoclaved brick manufacturing method have the beneficial effects that the ash residue is treated to obtain a catalyst and an autoclaved brick raw material in the ash residue, the autoclaved brick raw material is manufactured into an autoclaved brick, and the comprehensive utilization ratio of the useful components in the ash residue is improved.

The invention provides a reagent and method for rapid digestion colorimetric determination of chemical oxygen demand of sewage. The reagent comprises a catalyst and a composite oxidant. The catalyst comprises silver sulfate and sulfuric acid, and the composite oxidant comprises potassium dichromate, ammonium metavanadate, ammonium molybdate, potassium sulfate, mercury sulfate and dilute sulfuric acid. The method comprises the step of digesting a water sample by using the reagent. The method disclosed by the invention can be used for determining by using a common spectrophotometer in a laboratory, does not need a hash matched spectrophotometer, reduces the detection cost, is simple to operate and short in digestion time, can be used for simultaneously digesting dozens of water samples, andis suitable for batch detection of the water samples. Experimental results show that the detection limit of the method is 4.52 mg/L, the oxidation rate of organic matters is greater than or equal to 99.0%, and the relative error is less than or equal to 5% when the chemical oxygen demand determined by adopting the method is compared with the result determined by adopting a hash method.

The invention relates to an oily wastewater treatment method which is characterized by comprising the following steps of: adding one advanced oxidation treatment device (CAOT) capable of generating activated gas containing OH- between any two treatment apparatuses in the conventional wastewater treatment technology, mixing the wastewater flowing out of the first treatment apparatus with air of activated gas containing OH- generated by the advanced oxidation treatment device (CAOT), generating CAOT activated water in the wastewater, leading the wastewater containing the CAOT activated water into a catalytic bed to perform a catalytic reaction with a catalyst, leading the products into the second treatment apparatus to improve the purification and separation capability of the second treatment apparatus, controlling the volume ratio of the OH- activated gas to the wastewater between 1% and 20%, and controlling the residence time of the wastewater on the catalytic bed between 2 s and 1500 s. The oily wastewater treatment method has the advantages of low investment and low cost, and the emission standards and the treatment efficiency are improved.