37results about How to "Little effect on properties" patented technology

The invention provides a method for repairing in-situ electrochemical circulation wells polluted by chlorinated hydrocarbons. The steps are as follows: dig wells in groundwater polluted areas, and install well pipes in the wells, wherein every two wells form a group, and in each group of wells, One well is used as a water injection well, and the other well is used as a water pumping well. The top end of the well pipe is open and the bottom end is closed. Several small holes are opened on the lower end of the well pipe; the anode plate is suspended into the water injection well and the cathode plate, the anode plate and the cathode plate are respectively connected to the positive pole and the negative pole of the power supply arranged outside the well through wires; the power supply is started to energize the anode plate and the cathode plate, and at the same time, the groundwater in the pumping well is continuously pumped by a water pump and injected into the water injection well In order to strengthen the groundwater flow circulation, the hydrogen and oxygen produced in the water injection wells diffuse to the aquifer under the action of the groundwater flow circulation to promote the chemical / microbial degradation of chlorinated hydrocarbons in the groundwater. The restoration method provided by the invention has stable effects and is environmentally friendly.

The invention discloses a contact type optical fiber grating ice-pressure sensor with better stability, which belongs to the field of sensing technologies. The sensor is characterized in that the contact type optical fiber grating ice-pressure sensor consists of a metal bottom plate, a metal protective case, a metal force-bearing panel, a clamping piece, a uniform strength beam, a micro-optical fiber grating strain sensor and a transmission optical cable component. The sensor is mounted on the structure through the metal bottom plate, the clamping piece fixes the micro-optical fiber grating strain sensor on the uniform strength beam through a screw, and the different shapes of the metal force-bearing panel can be changed according to the different force application structures; in addition, the measurement sensitivity of the sensor can be adjusted by changing the dimensions of devices according to actual demands, thereby being applicable to different types of model tests. The ice-pressure sensor can indirectly measure the ice-pressure by measuring the strain, and the pressure sensitivity coefficient of the sensor is improved by utilizing the natures of an optical fiber grating, which is not affected by materials. The ice-pressure sensor can well eliminate the affects of eccentric force on the measured value and realize the temperature self-compensation; and the ice-pressure sensor can simultaneously overcome the shortcomings that the traditional electric sensor is vulnerable to electromagnetic interferences, the long-term stability is poor and the like, and has the advantages of high precision, small volume, light weight, small affects on the natures of the structure and the like.

The invention discloses a wax-wrapped peroxide microcapsule and a preparation method thereof. According to the invention, a core material of the microcapsule is a peroxide, and the wall of the microcapsule is wax. The preparation method comprises the following steps: dissolving petroleum wax at a temperature of 50 to 90 DEG C by using a low molecule alcohol as a solvent, adding micro peroxide powder, controlling a stirring speed to be 3000 to 8000 r / min, carrying out cooling to a temperature of 25 to 30 DEG C, removing the solvent through vacuum filtration and carrying out blow drying with nitrogen so as to obtain the wax-wrapped peroxide microcapsule. The wax-wrapped peroxide microcapsule improves thermal stability of the peroxide, is convenient for storage and transportation, is especially applicable as a polymerization initiator and is beneficial for smoothness of reaction.

The invention discloses a making method of superparamagnetism starch, which comprises the following steps: allocating starch milk through starch and deionized water; adjusting pH value; adding solubleferrous salt solution to adsorb once; filtering in the vacuum or separating centrifugally; removing water to obtain sediment; adding hydrogen peroxide solution to oxidize once; dehydrating; washing;obtaining starch product with water; repeating these steps to obtain magnified starch product with water; drying; obtaining the product.

The invention discloses an intelligent chemical analysis system for distinguishing detection of a weak electrolyte sample and a method therefor. The intelligent chemical analysis system is characterized by comprising an embedded module, a potentiostat and a three-electrode sensor. The method comprises that the self-developed potentiostat combines with the embedded module; a two-step excitation acquisition method is adopted; through the first excitation acquisition process, solution resistance is automatically fitted and an electrical signal produced by the solution resistance is added to a secondary excitation signal; and through the combination of the second acquisition process, real-time Fourier transform and principal component analysis, an optimized weak electrolyte solution whole-distinguishing graph is obtained. The method has good detection effects, a wide application scope and low influence on solution properties.

An oil flow overflow fault detection method for an oil-filled high-pressure casing, which performs unsaturated carbon-carbon bond detection by means of a chemical reaction, and determines whether an oil flow overflow fault occurs in the oil-filled high-pressure casing by means of the detection result of the unsaturated carbon-carbon bond. Specifically, a bromine carbon tetrachloride solution or a potassium permanganate aqueous ethanol solution is used as a detection reagent to detect a sample that is sampled from a surface of an oil-filled high-pressure casing to be tested, and it is determined whether the unsaturated carbon-carbon bond is detected according to whether a detection test paper is discolored, thereby determining whether an oil flow overflow fault has occurred in the oil-filled high-pressure casing to be tested. The present invention further relates to an oil flow overflow fault detection sampler for an oil-filled high-pressure casing, comprising a support rod (1), a sampling brush (3), and a fixing member (2) that is used for rotatably fixing the sampling brush and that is mounted at a top end of the support rod. The detection method and the sampler are simple and easy to operate, are resistant to environmental interference, and have the characteristics of accurate, sensitive and prompt detection.

The invention discloses early strength and fast hardening type rock filling and grouting recycled concrete. The concrete comprises, by weight percentage, 49.3-50.1% of recycled aggregate, 40.9-41.6% of self-compaction dry powder and 8.3-9.8% of mixing water, wherein the weight percentage sum of the raw materials is 100%. The invention further discloses a production method of the concrete. The method includes: fixing a form board, pouring into the recycled aggregate to fill the form board, evenly pouring the self-compaction dry powder into the form board, performing auxiliary vibration while pouring, and performing the rock filling and grouting of the next layer when slurry fills the gaps of the aggregate and returns to the surface of the aggregate. The early strength and fast hardening type rock filling and grouting recycled concrete has the advantages that the workability regulating and controlling difficulty of the recycled concrete can be lowered, the utilization rate of the recycled aggregate can be increased, the strength fluctuation of the recycled concrete can be reduced, the production process can be simplified, and the strength stability of the concrete can be increased.

The invention discloses a highly selective chemical modification method for tryptophan and residues of tryptophan. The method comprises the steps that: tryptophan or a substance containing a tryptophan residue is used as a modified object in water, under the action of an aldehyde component, highly selective three-component electrophilic substitution reaction are conducted on aromatic primary aminemodifiers and tryptophan / tryptophan residues in modified products, so that aromatic primary amine modifier molecules are covalently bonded to the tryptophan / tryptophan residues. In the chemical modification method, the aromatic primary amine modifiers have excellent selectivity for the tryptophan and the residues of tryptophan in proteins, and have no significant reactivity with other active amino acids and residues thereof; the covalent bonding forms among the aromatic primary amine modifier molecules and the tryptophan and the residues of tryptophan, and the durability is excellent.