437 results about "Potassium ions" patented technology

A long-term fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a primary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a secondary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, potassium, sodium, calcium and / or magnesium benzoate, for providing benzoate ions dispersed in the water when the secondary alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent.

The invention relates to the technical field of fire prevention, and discloses a high-and-low-voltage power distribution room fire prevention early warning system based on potassium ion aerosol fire extinguishing, which comprises a smoke fire detection module used for detecting fire related data inside and outside a high-and-low-voltage power distribution room; the fire related data comprises smoke data and temperature data; the comprehensive evaluation module is used for judging whether an adopted evaluation model is a temperature evaluation model or a smoke evaluation model according to the fire related data; the fireproof grade classification module is used for grading fireproof grades in the high and low voltage power distribution room according to the screened evaluation model; the fire prevention measure implementation module is used for starting the potassium ion aerial fog fire extinguishing equipment in the corresponding fire prevention subareas to extinguish fire according to different grades; the electrical characteristic monitoring module is used for monitoring the load current and arc signal intensity of electrical equipment in the high-low voltage power distribution room and the temperature change rate of key nodes in real time; according to the invention, multi-dimensional accurate monitoring and graded prevention and control of the fire risk of the high and low voltage power distribution room are realized.

The invention relates to the technical field of organic synthetic chemistry, in particular to a preparation method of ethyl 2-n-butyl acetoacetate, which comprises the following specific steps: S1, preparation of a composite solid base catalyst, S2, synthesis of ethyl 2-n-butyl acetoacetate, S3, post-treatment of a reaction solution, and S4, separation and purification of a product. The preparation method has the following beneficial effects that the magnesium-aluminum composite oxide is used as a carrier, and the composite solid base catalyst loaded with potassium and lanthanum has relatively high catalytic activity and selectivity; the magnesium-aluminum composite oxide carrier has a relatively large specific surface area and rich alkaline sites, so that a good catalytic environment is provided for the reaction; as a main active component, potassium ions can effectively activate alpha-active methylene of ethyl acetoacetate and promote formation of negative ion intermediates; the introduction of lanthanum ions can adjust the electronic structure of the catalyst, enhance the stability of the active center and inhibit the occurrence of side reactions.

The invention relates to an adsorbent based on an X molecular sieve and preparation and application thereof, and a preparation method of the adsorbent comprises the following steps: (1) mixing the X molecular sieve with a binder, molding and roasting to obtain a molded body; (2) treating the molded body obtained in the step (1) with an alkali solution to perform in-situ crystallization on the binder in the molded body to obtain a crystallized product; (3) carrying out partial barium ion exchange on the crystallized product obtained in the step (2) by using a barium salt solution, and drying to obtain a dried product; (4) carrying out ammonium ion exchange on the dried product obtained in the step (3) by using an ammonium salt solution, and roasting in a flowing atmosphere to obtain a roasted product; and (5) performing barium ion exchange and optional potassium ion exchange on the roasted product obtained in the step (4), and then drying to obtain the adsorbent. The adsorbent has at least two kinds of mesoporous channels with different apertures, has high barium ion exchange capacity, high adsorption capacity and compressive strength, and shows good adsorption selectivity and mass transfer performance when used for adsorption separation of p-xylene.

The present invention provides a stable amorphous tigorasone of formula (I). The present invention provides stable amorphous tigorazan that is free of other solid state forms, is stable over shelf life, and does not convert to any other solid state form.

The invention discloses a tellurium-doped sulfurized polyacrylonitrile potassium storage negative electrode material and a potassium ion total battery, and belongs to the field of potassium ion batteries. In order to solve the technical problems of low sulfur utilization rate and poor rate capability when sulfurized polyacrylonitrile is used as a potassium storage negative electrode material, the tellurium-doped sulfurized polyacrylonitrile (Te-SPAN) material with high performance is synthesized in a tellurium doping manner. In the tellurium-doped sulfurized polyacrylonitrile (Te-SPAN), the content of tellurium is lower than 5%, the content of sulfur is 33%-39%, and the content of carbon is 59%-62%. When the Te-SPAN is used as a potassium storage negative electrode material, the Te-SPAN shows high potassium storage capacity, excellent rate capability and cycling stability. In addition, the potassium ion total battery assembled based on the composite negative electrode and the low-defect manganese potassium hexacyanoferrate positive electrode also shows very excellent electrochemical performance.

The invention belongs to the technical field of health-care food, and particularly relates to functional milk assisting in lowering blood pressure and a preparation method thereof.The functional milk comprises, by weight, 99.5% of raw milk and 0.5% of a potassium ion bridged citrus fiber-green tea polyphenol network, raw milk is sequentially subjected to trypsin and proline specific incision enzyme treatment, HPCD-ultrasonic treatment and pulsed magnetic field treatment. The invention provides a systematic solution, which exceeds a simple extraction and addition mode in the prior art, and solves the stability problem of the antihypertensive active component in the processing and storage process.

The invention discloses a preparation method and application of doped hierarchical porous manganese dioxide, and belongs to the field of catalyst preparation and air purification. According to the invention, potassium permanganate is used as a manganese source and an oxidizing agent, a modified reducing agent is added, mixing and stirring reaction are carried out at room temperature, and the doped hierarchical porous manganese dioxide catalyst is synthesized after washing, drying and high-temperature treatment. The preparation method is simple in preparation process and high in repeatability; the prepared manganese dioxide realizes doping of potassium ions and formation of oxygen vacancies, and the catalytic activity of the manganese dioxide is improved; the doped manganese dioxide catalyst has a multi-stage structure of micropores, mesopores and macropores, the multi-stage pore structure endows the doped manganese dioxide catalyst with a relatively large specific surface area, the physical adsorption capacity of the doped manganese dioxide catalyst can be improved, and meanwhile, more active sites are exposed, so that the doped manganese dioxide catalyst shows relatively high activity and stability in a reaction for catalytically oxidizing gaseous pollutant formaldehyde at room temperature.

The invention discloses a functionalized hybrid flame retardant based on cyclodextrin-MOF (Metal Organic Framework) as well as a preparation method and application thereof, and belongs to the technical field of high polymer material science and flame retardance. The hybrid flame retardant (F-CD-MOF) has a core-shell structure, a core body is crystalline CD-MOF formed by self-assembly of cyclodextrin and potassium ions, and a shell layer is an organic interface layer which is formed by grafting of a silane coupling agent and contains an active functional group (-NH2 or-NCO). The preparation method comprises the steps of CD-MOF primary crystal synthesis, surface silanization functionalization and post-treatment. The flame retardant can be used as a reactive nanofiller for preparing a high-performance flame-retardant polyurea coating, a polyurea three-dimensional cross-linked network is embedded through covalent bonding, the UL-94 flame-retardant grade of the obtained coating reaches V-0 grade, the peak heat release rate is reduced by 40% or above compared with that of a pure polyurea coating, and the flame retardant has excellent mechanical properties and is suitable for industrial production. The fireproof coating is suitable for high-end fireproof fields such as building fireproof coatings and electric power facility fireproof coating materials.

The invention discloses a composite inducer for promoting adhesion and metamorphosis of marine bivalve mollusk larvae and an application method of the composite inducer. The composite inducer for promoting adhesion and metamorphosis of the marine bivalve mollusk larvae comprises glutamine, glutamic acid, potassium chloride, calcium chloride and taurine, and the concentration ratio of the glutamine to the glutamic acid to the potassium chloride to the calcium chloride to the taurine is 1: 1: 2 * 10: 1.7 * 10: 4. According to the application, glutamine, potassium ions, calcium ions, glutamic acid and taurine are matched, the application effect of the glutamine, the potassium ions, the calcium ions, the glutamic acid and the taurine in the aspect of improving the attachment and metamorphosis rate of the shellfish larvae is defined, the technical blank of multi-component cooperative regulation and control of the attachment and metamorphosis of the shellfish at present is filled, a new solution is provided for bivalve shellfish fry production, and the application prospect is wide. The method is of great significance in promoting healthy development of the mariculture industry.

The invention relates to modified nitrogen-rich carbon nitride as well as a preparation method and photocatalytic application thereof. The preparation method comprises the following steps: mixing nitrogen-rich carbon nitride and fused salt, and performing secondary calcination to obtain an intermediate; the secondary calcining temperature is 550 DEG C to 600 DEG C; the fused salt comprises a potassium source; and washing and drying the intermediate to obtain the modified nitrogen-rich carbon nitride. According to the invention, potassium ion doping modification is carried out in nitrogen-rich carbon nitride, so that the nitrogen-rich carbon nitride has stronger photon-generated carrier separation and transmission capability because the internal transmission resistance is reduced due to high crystallinity of KC3N5 and K < + > is successfully introduced to serve as a transmission channel for interlayer electron transfer, after introduction of K < + >, Eb of C3N5 is significantly reduced, exciton dissociation and generation of photon-generated carriers are facilitated, and the performance of the material is improved. The effect of producing H2O2 through photocatalysis of the KC3N5 is enhanced; when the photocatalyst is applied to photocatalytic production of H2O2, the production rate of H2O2 can reach up to 117 times of that of C3N5, and the photocatalyst has excellent photocatalytic stability, can efficiently produce H2O2 in a wide pH range, and is suitable for various complex water substrates to remarkably improve the production rate of H2O2.

The application relates to the technical field of saline-alkali soil improvement, and particularly discloses a preparation process of a multifunctional slow-release type saline-alkali soil improver and application thereof. The preparation process comprises the following steps: (1) uniformly mixing seaweed acid powder, phosphogypsum powder, carbon powder and water to form wet materials, then placing the wet materials in a sealed container for heating and heat preservation treatment, and obtaining a precursor after the treatment; and (2) placing the precursor at normal temperature for standing, crushing the precursor after the standing, and obtaining the soil improver. The soil improver prepared by the above process can not only more efficiently and quickly fix sodium ions, potassium ions, calcium ions and magnesium ions in the soil, but also can reduce the content of carbonate ions, so that the soil salt content and the soil alkalinity are reduced. In addition, the soil improver can help to relieve the phenomenon of soil alkali and salt return, and reduce the usage amount of the improver in the subsequent soil improvement process.

The invention discloses a modified hard carbon material, a preparation method thereof and a battery, and relates to the technical field of battery negative electrode materials. The preparation method comprises the following steps: forming a hard carbon layer by taking grafted silicon dioxide as a template, coating the hard carbon layer with a soft carbon layer, coating the soft carbon layer with silicon dioxide, performing confinement carbonization, and removing the template. Wherein the grafted silicon dioxide contains hetero atoms S, and the hard carbon layer contains hetero atoms P. During preparation, a silicon dioxide template grafted with 3-mercaptopropyltriethoxysilane is prepared by a reverse micelle method, a phenolic resin precursor is coated to form the hard carbon layer, P is introduced through modification of triglycidyl phosphate, then an asphalt-based soft carbon layer is coated, and carbonization is performed to obtain the modified phenolic resin. And removing silicon dioxide to obtain the target material. According to the material, active sites and interlayer spacing are increased through precise doping of S and P, volume expansion is relieved through cooperation of soft carbon and hard carbon, ion adsorption is enhanced through oxygen groups, and the material shows high capacity and excellent cycle stability in secondary batteries such as potassium ions and the like and is suitable for the field of novel energy storage batteries.

This invention relates to a method for preparing carbon materials based on in-situ surface fluoride modification, comprising the following steps: ① dissolving carbon material powder, aluminum nitrate, and polyvinyl alcohol in anhydrous ethanol to obtain an aluminum nitrate solution; ② dissolving ammonium fluoride in a mixed solvent to obtain an ammonium fluoride solution; slowly adding the ammonium fluoride solution dropwise to the aluminum nitrate solution to carry out an in-situ AlF3 growth reaction to obtain a composite material precursor; ③ drying the composite material precursor and then calcining it using a programmed temperature rise method to solidify the coating layer, thereby obtaining the AlF3@C composite material. This invention also discloses the application of this carbon material. The preparation method of this invention is simple and low-cost, and can efficiently prepare AlF3@C composite materials. The obtained AlF3@C composite material, as a negative electrode material for potassium-ion or lithium-ion secondary batteries, can significantly improve a series of properties such as the initial coulombic efficiency, rate performance, cycle stability, and potassium ion diffusion kinetics of the battery.

The present invention discloses a potassium-sodium co-doped manganese dioxide nanomaterial and its preparation and application. The present invention comprises the steps of dissolving silicate and manganese salt and mixing them to prepare a precursor; and treating the precursor by alkali etching. The potassium ions and sodium ions pre-embedded between the manganese dioxide layers stabilize the layered structure of the crystal, widen the interlayer spacing, and make the embedding and extraction of zinc ions and hydrogen ions smoother through electrostatic shielding. At the same time, the prepared potassium-sodium co-doped manganese dioxide nanomaterial has a unique nano-flower sheet structure, which increases the contact area of ​​the reaction. The electrochemical test results show that the potassium-sodium co-doped manganese dioxide nanomaterial has a good reversible specific capacity as a positive electrode material for zinc ion batteries. At a current density of 0.5 A / g, the high specific capacity can reach up to 239.1 mAh / g after 600 cycles.

This application provides a KVOH nanomaterial, its preparation method, and an aqueous zinc-ion battery to address the technical problem of low performance of vanadium pentoxide cathode materials in the prior art. The KVOH nanomaterial provided in this application is obtained by a solvothermal reaction in an aqueous ethylene glycol solution. The introduction of potassium ions in the reaction expands the ion transport channels between the electrode material layers, improving the cycle performance of the battery. At the same time, the introduction of tetravalent vanadium also increases the specific capacity of the battery, thereby solving the technical problem of low performance of vanadium pentoxide cathode materials in the prior art.

The invention relates to a pyrrole sulfonyl derivative, a preparation method thereof and application of the pyrrole sulfonyl derivative as a potassium ion competitive acid blocker. Specifically, the invention relates to a novel pyrrole sulfonyl derivative as shown in a general formula (I), a preparation method of the novel pyrrole sulfonyl derivative and application of the novel pyrrole sulfonyl derivative or a pharmaceutical composition containing the novel pyrrole sulfonyl derivative as a therapeutic agent, particularly application of the novel pyrrole sulfonyl derivative or the pharmaceutical composition containing the novel pyrrole sulfonyl derivative as a gastric acid secretion inhibitor and a potassium-competitive acid blocker (P-CABs) in biological medicine.

This invention relates to a potassium ion-responsive hydrogel based on iminoboronic ester bonds, its preparation method, and its applications. The hydrogel is prepared using guanosine, 2-formylphenylboronic acid, and polyoxyethylenediamine. The diol of guanosine forms a borate ester bond with 2-formylphenylboronic acid, and the primary amine in the polyoxyethylenediamine forms an imino group with the aldehyde group of 2-formylphenylboronic acid. The bases of guanosine form a G-quadruplex under the influence of potassium ions. The hydrogel has a porous network structure. The preparation method is as follows: A mixed aqueous solution of guanosine, 2-formylphenylboronic acid, and polyoxyethylenediamine is heated to boiling to obtain a clear solution. After cooling, the solution is mixed with a potassium ion solution to prepare the potassium ion-responsive hydrogel based on iminoboronic ester bonds. Compared with the prior art, the hydrogel prepared by this invention exhibits both temperature and potassium ion responsive characteristics.

The invention belongs to the technical field of material chemistry, and particularly discloses a magnesium-doped lithium ion sieve adsorbent and a preparation method and application thereof. A solution method is combined with a calcining process, the chemical general formula of the synthesized lithium ion sieve adsorbent is H4MgxTi (5-x) O12, and x is more than 0 and less than or equal to 0.4. According to the lithium ion sieve adsorbent, the specific surface area and hydrophilicity of the material are effectively regulated and controlled through Mg < 2 + > doping, meanwhile, structural defects are introduced, and the Li < + > transmission efficiency and the number of adsorption active sites of the material are remarkably improved. The lithium ion sieve adsorbent provided by the invention is used for extracting lithium from salt lake brine and shows a good Li < + > separation effect, the distribution coefficient Kd value (gt, 130 mL / g) of Li < + > is far greater than sodium ions, calcium ions, potassium ions and magnesium ions in the salt lake brine, and the lithium ion sieve adsorbent shows excellent lithium selective adsorption performance and practical application potential.

The invention discloses application of a tobacco potassium transporter NtKUP6 gene in regulating and controlling the potassium ion content of tobacco leaves and a method for increasing the potassium content of the tobacco leaves, and belongs to the technical field of plant genetic engineering. The invention provides an NtKUP6 gene capable of regulating and controlling the potassium content of tobacco leaves and application of the NtKUP6 gene, the gene is a potassium transporter coding gene, and the base sequence of the gene is shown as SEQ ID NO.1. According to the invention, Real-time PCR (polymerase chain reaction) finds that the expression quantity of the gene at the root of tobacco is the highest, and then the gene in tobacco is respectively silenced and overexpressed by means of genetic engineering, and finds that compared with a contrast, the content of potassium ions in overexpressed tobacco plant leaves is obviously increased, and the content of potassium ions in silent tobacco plant leaves is obviously reduced. A new thought is provided for cultivating the high-potassium-content tobacco through gene expression regulation and control, and a new gene resource is provided for improving the potassium content of the tobacco through a molecular means.

The invention relates to a carbon-water composition for hydration of human bodies of sports people, a beverage containing the carbon-water composition and application of the beverage. The composition is prepared from the following active ingredients in parts by weight: 4 to 8 parts of trehalose, 0.1 to 1 part of glucose, 0.1 to 1 part of crystalline fructose, 0.1 to 1 part of maltooligosaccharide, 0.04 to 0.055 part of sodium (in terms of sodium ion content) and 0.015 to 0.025 part of potassium (in terms of potassium ion content). The carbon-water composition is combined with sodium and potassium, so that rapid absorption of water by horse race sports people can be promoted, the carbon-water composition has optimal human hydration, the human dehydration risk of the sports people is reduced to the greatest extent, and the exercise endurance of running people is improved.

The invention belongs to the field of organic electrolytes and potassium ion batteries, and particularly relates to a low-concentration ionic liquid electrolyte for breaking the concentration balance of potassium ions and anions and a high-energy-density potassium ion battery. The potassium ion battery comprises a Prussian blue (PB) positive electrode, an electrolyte and a commercial ferrocene (Fc) negative electrode which is not subjected to any treatment, and the electrolyte is a low-concentration ionic liquid electrolyte (FSI-: K + (3.5 / 0.3 M)) of potassium bis (fluorosulfonyl) imide (KFSI). The low-concentration ionic liquid electrolyte developed by the invention has a high anion: K < + > concentration ratio (3.5: 0.3 M), increases the solvation proportion of rich anions, reduces the dissolution of an Fc organic metal compound, and ensures high interface stability and rapid K < + > storage kinetics of an Fc negative electrode. Meanwhile, the electrochemical window of the low-concentration electrolyte is widened, the PB positive electrode can stably circulate at 1.0-4.4 V, the long-period circulation and excellent rate capability of the PBFc total battery are also realized, and the total battery has the energy density of 246.7 Wh / kg under the current density of 20 mA / g.

A process for producing lithium hydroxide monohydrate from lithium chloride, the process comprising: (a) adding an aqueous potassium ion and hydroxide ion-containing solution to an aqueous lithium chloride-containing solution, thereby obtaining a mixture comprising lithium hydroxide, potassium chloride and water, (b) selectively precipitating potassium chloride from the mixture, thereby obtaining potassium chloride precipitate and a first mother liquor solution, (c) separating the potassium chloride precipitate from the first mother liquor solution, (d) processing the potassium chloride precipitate to obtain an aqueous potassium hydroxide-containing solution, (e) adding the aqueous potassium hydroxide-containing solution to the separated first mother liquor solution, thereby obtaining a potassium hydroxide-enriched first mother liquor solution, and (f) selectively precipitating lithium hydroxide monohydrate from the potassium hydroxide-enriched first mother liquor solution, thereby obtaining lithium hydroxide monohydrate precipitate and a second mother liquor solution.

The present application relates to the field of pharmaceutical chemistry technology, and specifically discloses a calcium polystyrene sulfonate and a preparation method thereof. The preparation method of calcium polystyrene sulfonate comprises the following steps: S1: uniformly mixing sodium polystyrene sulfonate microspheres with an aqueous dispersion of zeolite, heating and mixing, solid-liquid separation, and washing to obtain primary sodium polystyrene sulfonate microspheres; S2: preparing the primary sodium polystyrene sulfonate microspheres into suspension one, passing suspension one and calcium chloride solution into a microchannel reactor at the same time, reacting, solid-liquid separation, washing, preparing suspension two, passing suspension two and calcium chloride solution into a microchannel reactor at the same time, reacting, solid-liquid separation, washing, preparing suspension three, passing suspension three and calcium chloride solution into a microchannel reactor at the same time, reacting, solid-liquid separation, washing, and drying to obtain calcium polystyrene sulfonate. The calcium polystyrene sulfonate prepared in the present application has a high calcium loading rate and potassium ion exchange capacity.

The application discloses a preparation method of lithium niobate microcrystal powder and belongs to the technical field of functional ceramic material powder preparation. The composition of the lithium niobate is LiNbO3. The preparation method of the lithium niobate microcrystal powder comprises the following steps: firstly, preparing lithium niobate powder doped with potassium ions and sodium ions (K 0.5 Na 0.5 ) 1‑x Li x NbO3, x =0.5~0.9; then, preparing a raw material mixture of lithium niobate microcrystals; and finally, preparing the lithium niobate microcrystal powder. The lithium niobate microcrystal powder prepared by the application is uniform and good in dispersity; the XRD analysis result shows that the crystallinity of the particles is high and the particles are pure lithium niobate; the application is simple in steps, the obtained product meets the requirements of lithium niobate ceramic raw materials, is small in mechanical pollution, small in formula deviation, easy to control in process, small in chemical composition deviation of the product, good in stability and capable of large-scale batch production.

The application discloses a modified hard carbon material and a preparation method and a battery thereof, and relates to the technical field of battery negative materials. The hard carbon layer is formed by using grafted silica as a template, then the soft carbon layer is coated outside the hard carbon layer, and then the silica is coated outside the soft carbon layer to limit carbonization and remove the template to obtain the target material; wherein the grafted silica contains a heteroatom S, and the hard carbon layer contains a heteroatom P; in the preparation, the silica template grafted with 3-mercaptopropyl triethoxysilane is prepared by a reverse micelle method, the phenol formaldehyde resin precursor is coated to form the hard carbon layer, P is introduced by modification of the trisglycidyl phosphate, and then the pitch-based soft carbon layer is carbonized, and then the silica is removed to obtain the target material. The material increases the active sites and the interlayer spacing by accurate doping of S and P, cooperatively relieves the volume expansion by the hard and soft carbons, and strengthens the ion adsorption by the oxygen groups, and exhibits high capacity and excellent cycle stability in the secondary batteries such as potassium ion batteries, and is suitable for the field of new energy storage batteries.

The invention discloses a method for cultivating low-potassium-tolerant rice. The rice OsSPL19 gene is directionally knocked out by using a CRISPER / Cas9 technology, and it is found that a transgenic plant with the OsSPL19 gene knocked out is sensitive to low potassium, the plant is short and small under low potassium treatment, the root is shortened, the potassium ion content of the root and the overground part is obviously reduced, and the potassium ion absorption capacity of the root is obviously reduced. Overexpression of the OsSPL19 gene in rice shows that a plant overexpressed by the OsSPL19 gene is tolerant to low potassium and grows well under a low-potassium condition, the potassium ion content of plant roots and overground parts is obviously increased, and the potassium ion absorption capacity of the roots is obviously enhanced. The result shows that the OsSPL19 gene participates in a rice low-potassium-resistant signal pathway and is a rice low-potassium-resistant gene. According to the invention, guarantee can be provided for improving the low-potassium resistance of the rice and cultivating low-potassium-resistant rice varieties.

The application belongs to the technical field of flame retardant materials, and particularly relates to a low-ion-precipitation type halogen-free flame retardant for electronic products and a preparation method thereof. The method uses a phosphorus-nitrogen type halogen-free flame retardant as raw material, first generates active sites on the surface of the flame retardant powder through low-temperature plasma irradiation, then generates a silane coupling agent containing a crown ether group in situ in anhydrous ethanol by pre-reaction of the silane coupling agent and a hydroxymethyl crown ether, adds deionized water to start hydrolysis and polycondensation, forms a crown ether functionalized polysiloxane crosslinking layer in situ on the surface of the particles, and finally drives the free sodium and potassium ions in the particles to diffuse outward and be selectively complexed, captured and fixed by the crown ether layer under the condition of ultrasonic-assisted warm water immersion washing. The application solves the problem of the deterioration of the electrical properties of a polymer insulating material in a humid heat environment caused by residual ion impurities of the flame retardant.

The objective is to provide a method for dissolving solids that is excellent at dissolving solids generated in nuclear facilities. [Solution] A method for dissolving a solid generated at a nuclear facility, comprising dissolving the solid in a solution containing at least one of carbonate ions and bicarbonate ions, and at least one of potassium ions and cesium ions.

The present invention addresses the problem of providing a thawing solution capable of maintaining or improving the toxic activity of highly active NK cells or the like after thawing. A liquid for suspending cells to be administered to a human fulfills the following conditions: (1) containing potassium ions, (2) pH 4.9 or more, (3) containing no chloride ions at a concentration of 135 mEq / L or more, (4) containing no glucose at a concentration of 5.55 mM or more, (5) containing no calcium ions at a concentration of 0.423 mM or more, (6) having a permeation pressure of 200-396 mOsm, and (7) containing any one organic acid selected from the group consisting of succinic acid, malic acid, lactic acid, citric acid, and acetic acid.