Coordination template for ZnS or ZnSe nanometer crystal preparation and hydrothermal preparation method thereof

The invention relates to a matching template of nano ZnS or ZnSe crystal and a hydrothermal synthesis method thereof. Glutin or chitosan salt is taken as the matching template. The hydrothermal synthesis method includes the following steps: heating zinc salt and matching template agent at mass ratio of 1:1-10 for 1-8hours in water which is at mass ratio of 10-50 to zinc salt under constant temperature of 50-80 DEG C, then filtrating after cooling; adjusting the pH value to 9-12 through sodium hydroxide or ammonia, then adding sodium thiosulfate or sodium selenite at mass ratio of 0.5-5 to zinc salt; after dissolution, adding hydrazine hydrate or vitamin C at mass ratio of 0.5-10 to sodium thiosulfate or sodium selenite, after which clear and uniform solution can be obtained after dissolution; transferring the solution into a hydrothermal kettle and filling 60-90%of the hydrothermal kettle; rising the temperature to 120-240 DEG C and heating for 12-24h, then collecting the deposit and washing ...

Process for preparing carbon nano-tubes filled by metal Zn

The invention discloses a method for preparing carbon nanotubes filled with metal Zn, which comprises the steps of dissolving water soluble salt of the metal Zn (used as a Zn source) in deionized water, preparing into a catalyst powder by a freeze-drying method, placing the catalyst powder into a chemical vapor deposition furnace, and allowing reaction with methane as a carbon source and nitrogenas a protective gas at 800-1,000 DEG C to obtain carbon nanotubes filled with the metal Zn. The inventive preparation method has the advantages of simple process, easy product purification, high yield, good effect, and applicability to industrial production.

Antiseptic paper containing natural mineral powder and making method thereof

The invention provides antiseptic paper containing natural mineral powder. The antiseptic paper has the fixed quantity of 60+/-2 g/m<2>, the quantitative breadth difference of no more than 5%, the tensile strength of MD4.0/CD2.0 kN/m, and the moisture content of 5-8%, and stellerite powder remained in the paper accounts for 15-20% of the paper by weight percentage; and with respect to the sterilization performance, the antiseptic paper can be used for killing no less than 60% of escherichia coli/staphylococcus aureus/candida albicans can be inhibited. The making method of the antiseptic paper comprises the following steps of weighing raw material components of 50-80% of paper pulp, 19-49% of zeolite powder, 0.2% of softening agent and 1% of retention aid according to weight percentage; and with adoption of a wet paper making process and equipment, mixing and pulping cotton pulp, bleached softwood kraft pulp and bleached hardwood kraft pulp, adding the softening agent and the 800-mesh stellerite ...

Placenta stem-cell anti-tumor vaccine, preparation method and application thereof

The invention relates to a biomedical engineering technology, in particular to anti-tumor vaccine prepared from placenta stem cells, a preparation method and application thereof. In the invention, the vaccine is prepared by saving the placenta stem cells after being cultured for 8 generations in small freezing tubes, and each small freezing tube contains 5*105 (200Mul) placenta stem cells. The preparation method of the vaccine comprises the following steps: (1) treating a placenta tissue; (2) acquiring the placenta stem cells; (3) culturing the placenta stem cells and sub-culturing for 8 times; and (4) preparing the placenta stem-cell anti-tumor vaccine. The invention provides a cell biological preparation which have an effect on vaccine defense before establishing tumors so that an organism generates a specific immune antibody and sensitized lymphocytes on tumor stem cells, and inhibit growth and migration of the tumor stem cells to obtain the cell biological preparation for blockingup ...

Collecting method and storage mode technology of lead denounce quantum elements

The invention relates to a collecting method and storage mode technology of lead denounce quantum elements, in particular to a technology for collecting and storing lead denounce quantum element resources which are massively distributed in airspace and aerospace to be taken as new substitute energy resources for standby. The collection and storage production process provided by the invention is extremely easy and safe and is exactly as the example in a diagram that a molecular closed container 1 made of a solid atomic wall material is butted with a gravitation mechanical pump 4 to eliminate molecules in the container, thereby enabling the lead denounce quantum elements outside the container to be absorbed into the container to form a condensed state of a strong gravitation field. When a gravitation monitoring meter 2 shows that the purity of the elements in the container reaches the standard, a stop valve 3 is turned off, the gravitation pump is switched off, and the needed lead denounce ...

Non-carrier yellow brass catalyst for preparing stephanoporate carbon fiber, preparation and process of using

The invention discloses a carrier-free copper zinc alloy catalyst for preparing multiporous carbon fiber and a preparation method and a use method thereof. The catalyst consists of oxides of copper metal and zinc metal, wherein, the mol ratio of copper to zinc is 9 to 1. The preparation method comprises the following steps that: according to the mol ratio, metal salt of the copper, metal salt of the zinc and citric acid equivalent to a mol number of the copper are taken to be mixed and dissolved in distilled water to prepare a transparent solution, and then the transparent solution is placed into a porcelain boat and is heated in a muffle furnace at a temperature of between 500 and 800 DEG C to produce the catalyst. The preparation of the multiporous carbon fiber is performed in a fixed bed gas continuous-flow reactor. No carrier is added in the copper zinc alloy catalyst, the catalyst consists of the oxides of the copper metal and the zinc metal, and no alkali metal needed for the prior ...

Method for preparation of hollow spherical cadmium sulfide nanocrystalline

The invention discloses a method for preparing a hollow spherical cadmium sulfide nano-crystal. The method adopts a hydro-thermal method, and comprises the following steps of: firstly, adding sodium dodecyl sulfonate and hexadecyl trimethyl ammonium bromide into deionized water, sufficiently stirring the mixed solution until the sodium dodecyl sulfonate and the hexadecyl trimethyl ammonium bromide are completely dissolved in the water to form a transparent solution, and adding cadmium chloride and thioacetamide into the transparent solution to stir and mix evenly; then, adding the mixed solution in a hydrothermal reaction kettle, sealing the hydrothermal reaction kettle at a temperature of between 80 and 160 DEG C for 6 to 24 hours; opening the reaction kettle after the reaction kettle is naturally cooled to room temperature; and scrubbing and precipitating the reacted mixed solution by the deionized water and absolute ethyl alcohol, and centrifugally filtering and drying the precipitate ...

Highway double-guide-beam bridge erecting machine and turning method

The invention discloses a highway double-guide-beam bridge erecting machine and a turning method. The bridge erecting machine comprises longitudinal guide beams, a front support leg, a rear support leg and a rear propping device, wherein the longitudinal guide beams comprise two rows of parallel space trusses with the same structure and size, a front frame is installed between the front end partsof the two rows of space trusses, an upper rear cross beam is installed between the rear end parts, and the front frame and the upper rear cross beam are used for integrating the two rows of space trusses into a whole. The turning method comprises the following steps of: (1) preprocessing the upper rear cross beam; (2) removing part of rods of the front frame; (3) installing the preprocessed upper rear cross beam; (4) removing and hoisting the front support leg; (5) installing a removed lower front cross beam; (6) interchanging the front support leg and the rear support leg; and (7) subsequently ...

Method for preparing Bi2Te3/carbon nanotube composite material

The invention discloses a method for preparing a Bi2Te3/carbon nanotube composite material, which comprises the following steps: dissolving acidized carbon nanotubes into aqueous solution of surfactant EDTA, performing ultrasonic dispersion, and adding alkali to adjust the OH- concentration of the solution to between 0.1 and 1mol/L; in a determined molar ratio of Bi to Te of 2:3 through chemical composition analysis of Bi2Te3, dissolving a compound containing Bi element, a compound containing Te element or a Te simple substance into the aqueous solution, and adding a reducing agent NaBH4 with stirring to obtain mixed solution; and stirring and heating the mixed solution in a water bath, centrifugally separating, washing and collecting solid product after the reaction is finished, and drying. In the Bi2Te3/carbon nanotube composite material prepared by the method, the size of Bi2Te3 particles is about between 10 and 20nm; and the Bi2Te3/carbon nanotube composite material combines advantages ...

Method of preparing Bi2Te3 nano-slice

Method for carrying out ion exchange on solid matters containing exchangeable ions

The invention provides a method for carrying out the ion exchange on solid matters containing exchangeable ions, which comprises the following steps: carrying out the bipolar membrane electrodialysis on a solution containing ions to prepare acid liquid and alkali liquid; making the solid matters containing the exchangeable ions in contact with the acid liquid or the alkali liquid, and carrying out the ion exchange to obtain the pulp of the solid matters through the ion exchange; carrying out the solid-liquid separation on the pulp of the solid matters through the ion exchange to obtain a solid phase and a liquid phase; and recycling the liquid phase obtained in the step of the solid-liquid separation as the solution containing the ions in the step of the bipolar membrane electrodialysis, wherein the negative ion concentration or the positive ion concentration in the solution containing the ions in the step of the bipolar membrane electrodialysis is 0.01-10 mole/liter. According to the method ...

Highway double-guide-beam bridge erecting machine and turning method

The invention discloses a highway double-guide-beam bridge erecting machine and a turning method. The bridge erecting machine comprises longitudinal guide beams, a front support leg, a rear support leg and a rear propping device, wherein the longitudinal guide beams comprise two rows of parallel space trusses with the same structure and size, a front frame is installed between the front end parts of the two rows of space trusses, an upper rear cross beam is installed between the rear end parts, and the front frame and the upper rear cross beam are used for integrating the two rows of space trusses into a whole. The turning method comprises the following steps of: (1) preprocessing the upper rear cross beam; (2) removing part of rods of the front frame; (3) installing the preprocessed upper rear cross beam; (4) removing and hoisting the front support leg; (5) installing a removed lower front cross beam; (6) interchanging the front support leg and the rear support leg; and (7) subsequently ...

Aspergillus niger proline protein endopeptidase and preparation method thereof

The invention relates to Aspergillus niger proline-specific endoprotease and the preparation method thereof, which belong to the field of genetic engineering and enzymology. The Aspergillus niger proline-specific endoprotease is selected from amino acid sequence of Aspergillus niger proline-specific endoprotease with a sequence code of SEQ ID No.2, wherein the amino acid sequence has nucleotide sequences represented by the first to the 1,581 in SEQ ID No.1, and has polypeptides of amino acid sequence represented by SEQ ID No.2. Test shows that haze protein bands with molecular weight of 8to 14 kDa are disappeared completely after SDS-polyacrylamide gel electrophoresis detection of beer protein added with PEP, which shows that the haze activity protein rich in proline residues is hydrolyzed completely by PEP, and primarily testifies that proline-specific endoprotease can specifically cut protein and proline residues at carbon terminal of a peptide chain, and can eliminate cold haze substance ...

Anti-seepage and leak-blocking construction method for excavation of subway foundation pit in soft soil area

The invention discloses an anti-seepage and leak-blocking construction method for excavation of a subway foundation pit in a soft soil area, which comprises the following steps: 1) joint pre-reinforcement construction of an underground continuous wall: constructing a pre-reinforcement structure of a high-pressure rotary jet grouting pile, guiding holes, grouting by a sleeve valve pipe, sealing the holes, guiding the holes again and pre-burying the sleeve valve pipe for standby; and 2) the excavation of the foundation pit and the anti-seepage and leak-blocking construction: using surface floating earth for clearing and using the encased steel plate reinforcement method for anti-leak treatment for the situations that joints of the underground continuous wall have defects definitely and riskpoints are positioned below the excavation surface of the foundation pit, adopting the hole-guiding cyanogen injection condensing method for blocking of leak points with slight water leakage situation, ...

Voice signal recognition system and method based on surface myoelectric signal

The invention discloses a voice signal recognition system and method based on a surface myoelectric signal; as the motion of the forearm corresponds to the motion modes of hands, wrists and elbows, the facial muscles correspond to different motion modes during speaking; and by acquiring the surface myoelectricity of the facial muscles, the corresponding muscle motion mode can be completely recognized from a signal characteristic, furthermore, the voice information is recognized. The voice signal recognition system based on the surface myoelectric signal comprises a voice signal acquiring module (1) connected with a voice signal preprocessing module, wherein the voice signal preprocessing module is connected with a voice signal separating module (3), the voice signal separating module is connected with a characteristic parameter extracting module (4), and the characteristic parameter extracting module is connected with a voice signal distinguishing module (5). The system and the method are ...

Process for preparing carbon nano-tubes filled by metal Zn

The invention discloses a method for preparing carbon nanotubes filled with metal Zn, which comprises the steps of dissolving water soluble salt of the metal Zn (used as a Zn source) in deionized water, preparing into a catalyst powder by a freeze-drying method, placing the catalyst powder into a chemical vapor deposition furnace, and allowing reaction with methane as a carbon source and nitrogen as a protective gas at 800-1,000 DEG C to obtain carbon nanotubes filled with the metal Zn. The inventive preparation method has the advantages of simple process, easy product purification, high yield, good effect, and applicability to industrial production.

Antiseptic paper containing natural mineral powder and making method thereof

The invention provides antiseptic paper containing natural mineral powder. The antiseptic paper has the fixed quantity of 60+/-2 g/m<2>, the quantitative breadth difference of no more than 5%, the tensile strength of MD4.0/CD2.0 kN/m, and the moisture content of 5-8%, and stellerite powder remained in the paper accounts for 15-20% of the paper by weight percentage. With respect to the sterilization performance, the 2h antiseptic experiment on the paper shows that, the antiseptic paper can be used for killing no less than 60% of escherichia coli/staphylococcus aureus/candida albicans can be inhibited. The making method of the antiseptic paper comprises the following steps of weighing raw material components of 50-80% of paper pulp, 19-49% of zeolite powder, 0.2% of softening agent and 1% of retention aid according to weight percentage; and with adoption of a wet paper making process and equipment, mixing and pulping cotton pulp, bleached softwood kraft pulp and bleached hardwood kraft pulp ...

Method of preparing Bi2Te3 nano-slice

The invention discloses a method for preparing Bi2Te3 nanometer thin slice. The method adopts a technology of chemosynthesis with low temperature and wetness. Compound containing Bi are mixed with simple substance of Te in ionized water according to a proportion determined by the chemical constituents of final products, sufficient reducing agents and proper complexing agents are added, under the temperature of 95-110 DEG C, the mixture is stirred when the mixture is boiling, then the process of reacting is for 24-48 hours, then centrifugalization, washing and drying are carried out, and finally the method is completed. The shape is a polygon nanometer thin slice. The method has the advantages of simple technology and no addition of alkaline regulators, the obtained products have unified morphology, the shapes of the products are polygon nanometer thin slice, and the products have high purity, thus being capable of increasing the thermoelectric properties of Bi2Te3 base thermoelectric materials ...

Anti-seepage and leak-blocking construction method for excavation of subway foundation pit in soft soil area

The invention discloses an anti-seepage and leak-blocking construction method for excavation of a subway foundation pit in a soft soil area, which comprises the following steps: 1) joint pre-reinforcement construction of an underground continuous wall: constructing a pre-reinforcement structure of a high-pressure rotary jet grouting pile, guiding holes, grouting by a sleeve valve pipe, sealing the holes, guiding the holes again and pre-burying the sleeve valve pipe for standby; and 2) the excavation of the foundation pit and the anti-seepage and leak-blocking construction: using surface floating earth for clearing and using the encased steel plate reinforcement method for anti-leak treatment for the situations that joints of the underground continuous wall have defects definitely and risk points are positioned below the excavation surface of the foundation pit, adopting the hole-guiding cyanogen injection condensing method for blocking of leak points with slight water leakage situation, ...

Method for performing ion exchange on molecular sieve containing exchangeable ions

The invention provides a method for performing ion exchange on a molecular sieve containing exchangeable ions. The method comprises the following steps of: performing dealumnization and/or silicon reinsertion on the molecular sieve containing the exchangeable ions to obtain a molecular sieve with high ratio of silicate to aluminum; performing bipolar membrane electrodialysis on ion-containing solution to obtain acid liquor; contacting the molecular sieve with high ratio of silicate to aluminum and the acid liquor and performing ion exchange to obtain slurry of the molecular sieve which is subjected to ion exchange; performing solid-liquid separation on the slurry of the molecular sieve which is subjected to ion exchange to obtain a solid phase and a liquid phase; and circulating the liquid phase obtained through solid-liquid separation to serve as ion-containing solution in the step of bipolar membrane electrodialysis, wherein the content of negative ions in the ion-containing solution ...

Method for preparing Bi2Te3 / carbon nano-tube composite material

The invention discloses a method for preparing Bi2Te3 carbon nano tube composite material, which adopts microwave polyol synthesis technique: 1) Bi element compound and Te element compound or Te elementary substance are respectively dissolved in glycol according to the mol ratio of Bi: Te determined by the chemical composition of Bi2Te3 and then stirred and mixed together; 2) ultrasonic dispersion is carried out on the processed carbon nano tube in the glycol, and the pH value is adjusted to be 11-14; 3) according to the mass ratio of 0.1:1-2:1 between the carbon nano tube and the Bi2Te3, the mixed solution in the step 1) is titrated in the solution of the step 2) for reaction at the temperature of 140-190 DEG C in a state of microwave radiation; after the reaction, the products are separated centrifugally and washed, and the solid products are collected and dried. The technique is simple and rapid, and the prepared Bi2Te3 carbon nano tube composite material can be used for improving the ...

Aspergillus niger proline protein endopeptidase and preparation method thereof

The invention relates to Aspergillus niger proline-specific endoprotease and the preparation method thereof, which belong to the field of genetic engineering and enzymology. The Aspergillus niger proline-specific endoprotease is selected from amino acid sequence of Aspergillus niger proline-specific endoprotease with a sequence code of SEQ ID No.2, wherein the amino acid sequence has nucleotide sequences represented by the first to the 1,581 in SEQ ID No.1, and has polypeptides of amino acid sequence represented by SEQ ID No.2. Test shows that haze protein bands with molecular weight of 8 to 14 kDa are disappeared completely after SDS-polyacrylamide gel electrophoresis detection of beer protein added with PEP, which shows that the haze activity protein rich in proline residues is hydrolyzed completely by PEP, and primarily testifies that proline-specific endoprotease can specifically cut protein and proline residues at carbon terminal of a peptide chain, and can eliminate cold haze ...

Preparation method of composite material of carbon nanotube loaded with Bi2Te3 nanosphere

The invention relates to a preparation method of a composite material of a carbon nanotube loaded with a Bi2Te3 nanosphere, comprising the following steps: mixing ethylene glycol solution containing Bi and ethylene glycol solution containing Te according to the molar ratio 2:3 of Bi to Te determined based on the chemical formula of Bi2Te3; ultrasonically dispersing a processed carbon nanotube into mixed solution of ethylene glycol and deionized water, mixing the mixture with the mixed solution containing Bi and Te, and centrifugating, washing and collecting the deposited substance after reaction under microwave irradiation; ultrasonically dispersing the deposited substance into the ethylene glycol and dropping NaBH4 to be dissolved in the ethylene glycol solution, centrifugating, washing and collecting the solid product after reaction under microwave irradiation, and drying the solid product. The invention has a simple process. Since the Bi2Te3 is loaded and closely coated on the carbon ...

Preparation method of large-grain size latex particles

The invention relates to a preparation method of latex particles with grain sizes from 500nm to 1000nm. Agglomerating agent is copolymer of alkyl acrylate and carboxyl monomer, wherein the weight percentage of the carboxyl monomer is 3-60%, and the weight percentage of the alkyl acrylate is 97-40%; mixed emulsifying agent is fatty acid soap and alkane sulfonate, ferrous sulfate, rongalit, ethylenediaminetetraacetic acid tetrasodium salt and sodium hydrogensulfite are reducing agent, the reaction temperature is 75 DEG C, a first section of initiating agent is water-soluble initiating agent, a second section of initiating agent is oil-soluble initiating agent, and the average grain diameters are adjusted by cross-linking agent from 50 to 250nm to obtain the agglomerating agent; and the large-grain size latex comprises the components based on the parts by weight: 100 parts of the primary latex, 0.5-4 parts of the agglomerating agent, and 0.05-0.8 part of KOH solution under the agglomerating ...

Method for preparation of hollow spherical cadmium sulfide nanocrystalline

The invention discloses a method for preparing a hollow spherical cadmium sulfide nano-crystal. The method adopts a hydro-thermal method, and comprises the following steps of: firstly, adding sodium dodecyl sulfonate and hexadecyl trimethyl ammonium bromide into deionized water, sufficiently stirring the mixed solution until the sodium dodecyl sulfonate and the hexadecyl trimethyl ammonium bromide are completely dissolved in the water to form a transparent solution, and adding cadmium chloride and thioacetamide into the transparent solution to stir and mix evenly; then, adding the mixed solution in a hydrothermal reaction kettle, sealing the hydrothermal reaction kettle at a temperature of between 80 and 160 DEG C for 6 to 24 hours; opening the reaction kettle after the reaction kettle isnaturally cooled to room temperature; and scrubbing and precipitating the reacted mixed solution by the deionized water and absolute ethyl alcohol, and centrifugally filtering and drying the precipitate ...

Crystalline Form of Phenyl Bis (2,4,6-Trimethylbenzoyl) Phosphine Oxide With Large Particle Size and Crystallization Method for Making Same

A crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, with a large particle size, which belongs to a triclinic crystal system and space group P-1. A crystallization method for making the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, comprising adding a solid of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide to a solvent and mixing; followed by heating to 50 to 70° C. to achieve complete dissolution; cooling the solution to room temperature; and adding an anti-solvent to the resulting solution to cause precipitation of crystals. The crystals are allowed to grow at a constant temperature for 10 to 60 minutes, so as to give a slurry containing the crystals. Said slurry is subjected to filtration and then drying to obtain the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide. 1. A crystalline form of phenyl bis (2 ,4 ,6-trimethylbenzoyl) phosphine oxide with a large particle size , having:an X-ray powder diffraction pattern comprising characteristic peaks at 4.7±0.1, 9.3±0.1, 12.2±0.1, 13.5±0.1, 14.0±0.1, 16.2±0.1, 17.3±0.1, 18.7±0.1, 19.6±0.1, and 24.9±0.1 degrees 2θ; wherein, the crystalline form belongs to a triclinic crystal system and to a space group P-1; cell dimensions from single crystal:', 'a=8.0301(16)Å', 'b=8.6673(17)Å', 'c=19.252(4)Å', 'α=84.07(3)°', 'β=82.83(3)°', 'γ=63.75(3)°', 'molecules/unit cell (Z): 2., 'and wherein, the crystalline form is characterized by unit cell parameters substantially equal to the following2. The crystalline form of claim 1 , having:a melting point measured by differential scanning calorimetry of 117 to 121° C.; anda thermo-gravimetric analysis profile showing that the crystalline form starts to lose weight at 110±1° C. with a weight loss of 6.9±0.1% and starts to decompose and thus lose weight at 160±1° C.3. A crystallization method for making the crystalline form of phenyl bis (2 claim 1 ,4 claim 1 ,6-trimethylbenzoyl) phosphine oxide with a large ...

NON-COMBUSTION PNEUMATIC-VACUUM ENGINE

An engine includes cylinders using pressure differences to motivate the pistons. Each cylinder has a first outlet in its' first end, the first outlet being coupled to a vacuum chamber via a first valve and a first conduit, a second outlet in the cylinder's first end, the second outlet being coupled to an air pressure chamber via a second valve and a second conduit, a third outlet in the cylinder's second end, the third outlet being coupled to the vacuum chamber via a third valve and a third conduit, and a fourth outlet in the cylinder's second end, the fourth outlet being coupled to the air pressure chamber via a fourth valve and a fourth conduit. The valves are electrically controlled by a processor. When the first and fourth valves are turned on, the piston is pulled forward by a pressure difference created by the vacuum chamber and is at the same time pushed forward by a pressure difference created by the air pressure chamber. When the piston reaches its maximum length, the first and fourth valves are turned off, and the second and third valves are turned on, and the piston is pulled backward by a pressure difference created by the vacuum chamber and is at the same time pushed backward by a pressure difference created by the air pressure chamber. When the piston reaches its minimum length, the second and third valves are turned off, and the first and fourth valves are turned on. 1. An engine using air pressure and vacuum , comprising:a dual-function compressor coupled to a vacuum chamber and an air pressure chamber, said compressor maintaining said chambers to predetermined pressure values;one or more cylinders, each of which housing a piston coupled to a single crankshaft which transforms reciprocating linear motion into rotation;wherein each of said cylinder has a first outlet in its first end, said first outlet being coupled to said vacuum chamber via a valve and a first conduit; ["a first outlet in said cylinder's first end, said first outlet being coupled to ...

ION-EXCHANGE PROCESS

A process for ion-exchanging an exchangeable-ion containing solid material involves several steps. There is a bipolar membrane electrodialysis step, which involves subjecting an aqueous ion-containing solution to a bipolar membrane electrodialysis to produce an acid liquid. The process also contains an ion-exchange step, during which the exchangeable-ion containing solid material is contacted with the acid liquid to conduct ion-exchange to produce a slurry containing the ion-exchanged solid material. It further include a solid-liquid separation step, during which the slurry containing the ion-exchanged solid material is subject to a solid-liquid separation to produce a solid phase and a liquid phase. The pH value of the liquid phase is adjusted to 4-6.5. The pH-adjusted liquid phase is further subject to a solid-liquid separation to produce a treatment liquid. 1. A process for ion-exchanging an exchangeable-ion containing solid material , characterized in that said process comprises:a bipolar membrane electrodialysis step, which comprises subjecting an aqueous ion-containing solution to a bipolar membrane electrodialysis to produce an acid liquid;an ion-exchange step, which comprises contacting the exchangeable-ion containing solid material with the acid liquid and conducting the ion-exchange to produce a slurry containing the ion-exchanged solid material;a solid-liquid separation step, which comprises subjecting the slurry containing the ion-exchanged solid material to a solid-liquid separation to produce a solid phase and a liquid phase, adjusting the liquid phase to a pH of 4-6.5, and subjecting the pH-adjusted liquid phase to a solid-liquid separation to produce a treatment liquid;wherein the treatment liquid can replace at least a part of the aqueous ion-containing solution in the bipolar membrane electrodialysis step;wherein the aqueous ion-containing solution has an anion concentration or a cation concentration of 0.01-10 mol/L;wherein oxalic acid exists in ...

Preparation of moelcular sieve and treatment of silicon-containing wastewater therefrom

A method for the treatment of silicon-containing wastewater from the preparation of a molecular sieve or a catalyst includes the step of contacting the silicon-containing wastewater with at least one acid or at least one alkali, so that at least a part of the silicon elements in the silicon-containing wastewater form a colloid. A mixture containing a colloid is thus obtained. A silicon-containing solid phase and a first liquid phase are produced by a solid-liquid separation. A solid phase and a second liquid phase are produced by a solid-liquid separation after at least a part of the metal elements in the first liquid phase form a precipitate. At least a part of the second liquid phase is subjected to electrodialysis to produce an acid liquor and/or an alkali liquor. The silicon-containing solid phase can be used as the raw material for a molecular sieve synthesis.

Wastewater treatment method, wastewater treatment system, molecular sieve manufacturing method and manufacturing system

The present invention discloses a method for a wastewater treatment and the treatment system thereof, and a method for the preparation of a molecular sieve and the molecular sieve preparation system. The wastewater treatment method of the present invention comprises an electrodialysis treatment of the wastewater to obtain desalted water having a reduced content of organic ammonium ion and an alkali liquor containing an organic ammonium ion, wherein the electrodialyser used in the electrodialysis has at least one membrane unit, and at least a part of the membrane unit comprises a cation exchange membrane. The method for wastewater treatment and the system thereof in the present invention can effectively reduce the content of the organic ammonium ion in the wastewater and thereby reduce the COD value of the wastewater. Both the recovered organic ammonium ion and the produced desalted water can be recycled when the wastewater containing the organic ammonium ion from the production of a molecular sieve is treated using the present method, as realizes an effective reuse of resources.

Crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide with large particle size and crystallization method for making same

A crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, with a large particle size, which belongs to a triclinic crystal system and space group P-1. A crystallization method for making the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, comprising adding a solid of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide to a solvent and mixing; followed by heating to 50 to 70° C. to achieve complete dissolution; cooling the solution to room temperature; and adding an anti-solvent to the resulting solution to cause precipitation of crystals. The crystals are allowed to grow at a constant temperature for 10 to 60 minutes, so as to give a slurry containing the crystals. Said slurry is subjected to filtration and then drying to obtain the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide.

Genomic editing of improved efficiency and accuracy

Provided are compositions and methods for enhanced prime editing, which include a pegRNA that encodes a target mutation in a target protein, along with one or more nearby silent or conservative mutations. These silent mutations can increase the editing efficiency, without causing a change to the target protein sequence. Also provided are compositions and methods of using the improved prime editing for preventing or treating infections by SARS-CoV or SARS-CoV-2.

Double-sided weeding machine equipped with grass-cutting toothed plates

Disclosed is a double—sided weeding machine equipped with grass—cutting toothed plates, comprises a fixing frame, the top of the fixing frame is fixedly connected with a battery box, 5 the top of the battery box is fixedly connected with four wires, and both sides of the fixing frame are fixedly connected with fixing plates. A user holds the handle, and the driving motor drives the roller under the hub bracket to rotate, thereby driving the whole equipment to move. The battery supplies power to the hydraulic cylinder further make the shovel plate shovel grass back and forth. As the two sides of the shovel plate are set in V shape and the 10 end of the tooth rack far away from the shovel plate is set in a screw conehead shape, it is easier for the equipment to break soil and shovel grass, thereby facilitating improvement of weeding efficiency.

Front splayed backfiller for wolfberry

A front splayed backfiller for wolfberry comprises a front suspension frame, a backfilling frame body, a first scraper and a second scraper; the first scraper and the second scraper are fixedly 5 disposed on the backfilling frame body in a splayed structure; and the front suspension frame is arranged on the backfilling frame body for suspension connection with the front end of a tractor, and the present invention is driven by the tractor moving forward along the central line ofthe ditch. The excavated soi| on both sides ofthe ditch is pushed into the ditch by means of the first scraper and the second scraper arranged in a splayed structure to refill the ditch. 10 Therefore, the present invention is suitable for backfilling operation on wolfberry fields with simple structure, small occupation and relatively high working efficiency.

一种可调节电视机壁挂支撑装置

本实用新型公开了一种可调节电视机壁挂支撑装置，包括固定基座本体、一组相对的固定滑槽、移动滑动块、固定旋转座、旋转轴、旋转臂以及固定座，所述一组相对的固定滑槽分别开在固定基座本体上，所述移动滑动块滑动安装在一组相对的固定滑槽内，所述固定旋转座固定安装在移动滑动块一侧，所述旋转轴套装在固定旋转座上，所述旋转臂固定安装在旋转轴上，所述固定座固定安装在旋转臂上，所述固定基座本体上设有电视机调节机构。本实用新型的有益效果是，通过转动旋转臂调节电视机的角度，通过移动滑动块滑动调节电视机的位置，通过旋转螺纹固定杆调节电视机的高度，电视机使用灵活，方便对电视机的位置进行调节移动，并且占据的空间小。

Method of treating silicon-containing wastewater and method of utilizing silicon-containing wastewater, and molecular sieve manufacturing method

Radiation-proof wall structure for ct room of hospital

Genomic editing of improved efficiency and accuracy

Provided are compositions and methods for enhanced prime editing, which include a pegRNA that encodes a target mutation in a target protein, along with one or more nearby silent or conservative mutations. These silent mutations can increase the editing efficiency, without causing a change to the target protein sequence. Also provided are compositions and methods of using the improved prime editing for preventing or treating infections by SARS-CoV or SARS-CoV-2.

Walking power control system for wolfberry picking

A walking power control system for wolfberry picking, including a frame, a turntable, rotating rods, first gears, second gear, gear racks, supporting rods, hydraulic motors, a front traveling wheel, a left traveling wheel and a right traveling wheel. Hydraulic motors rotate to drives three traveling wheels to rotate, thereby driving the frame to move, when it is necessary to turn, a turntable is rotated, the turntable rotates to drive two first gears to rotate, and the two first gears rotate to drive the supporting rods to rotate, thereby driving the left traveling wheel and the right traveling wheel to rotate, so that the traveling direction of the frame is changed.

Multi-gas detection system based on internet of things

Genomic editing of improved efficiency and accuracy

Cancer immunotherapies using engineered cells

The disclosure provides hematopoietic cells wherein one or more selected second signaling molecule (s) are knocked out, such that stimulation of heterologous CD8+ T cells by the hematopoietic cells is substantially reduced.

Systems and methods for enhanced cell therapies

The present disclosure describes systems and methods for cell therapies. Cells (e.g., stem cells, immune cells, cardiomyocytes, etc. ) can be engineered to exhibit enhanced half-life as compared to control cell (e.g., a non-engineered cell). Cells can be engineered to exhibit enhanced proliferation as compared to a control cell. In some cases, immune cells can be engineered to effectively and specifically target diseased cells (e.g., cancer cells) that a control cell otherwise is insufficient or unable to target. In some cases, stem cells or differentiate cells such as cardiomyocytes can be administered to a target tissue for enhanced tissue engineering or regenerative medicine. The engineered cells disclosed herein can be engineered ex vivo, in vitro, and in some cases, in vivo. The engineered cells that are prepared ex vivo or in vitro can be administered to a subject in need thereof to treat a disease (e.g., myeloma or solid tumors). The engineered cells can be autologous to the subject. Alternatively, the engineered cells can be allogeneic to the subject.