77 results about "Potassium periodate" patented technology

The invention relates to a multifunctional cationic polymer gene vector and a preparation method and application thereof. A multifunctional cationic polymer is synthesized by oxidizing low molecular weight chitosan used as a framework material with potassium periodate and subjecting the oxidized low molecular weight chitosan and polyethyleneimine coupled with a sartan-class drug to reduction and ammonification. To overcome technical problems, the invention provides the novel cationic polymer with targeting performance of the acceptor of the tumor cell AT1, multiple proton buffering capability and adjuvant therapy effects on tumors and provides a preparation method with the advantages of mild conditions, low cost, applicability and reliability for the cationic polymer. A compound formed by the cationic polymer provided by the invention and plasmid DNA has the advantages of low cytotoxicity, good targeting performance, high transfection efficiency, substantial in-vitro antineoplastic effects, etc.; the polymer can be used for preparation of a non-virus gene transfer system capable of simultaneously transferring a gene drug and a chemical drug for cooperated treatment of a tumor.

The invention discloses a method for detecting ferritin based on nanogold catalytic chemiluminescence analysis. The method comprises the following steps that 1), a nanogold solution is prepared, 0.01% w / w of a HAuC14 solution of is heated to boiling, a sodium citrate solution of 1% is added under hard stirring, a heating source is removed after the mixed solution keeps boiling for fifteen minutes, the mixed solution is continuously stirred and cooled to the room temperature, and the obtained solution is stored in a refrigerator with the temperature of 4 DEG C for standby application; 2) nanogold is marked through ferritin antibodies, and the ferritin antibodies are utilized for modifying nanogold particles; 3), immunoreaction is carried out; 4), ferritin is detected through the chemiluminescence analysis, a nonogold / ferritin mixed solution modified by the ferritin antibodies after the immunoreaction is finished is moved into a chemiluminescence pool, a luminol-potassium periodate chemiluminescence reagent is injected into the solution, and the chemiluminescence intensity of the solution is measured and recorded through an IFFL-D chemiluminescencent analyzer to obtain the correlation between the chemiluminescence intensity and the ferritin to be measured.

The invention belongs to the technical field of adsorbing materials, and discloses an ion-imprinted nanocellulose adsorbing material and a preparation method and application thereof. The preparation method comprises the following steps of conducting oxidation modification with potassium periodate, amination modification with ethylenediamine, and thiocarbamide modification with potassium thiocyanate on nanocellulose successively, adding an imprinting metal ion solution and a formaldehyde solution, conducting a cross-linking polymerization reaction with stirring, immersing the polymerization products into an acid solution to remove imprinting metal ions, and obtaining the ion-imprinted nanocellulose adsorbing material. The ion-imprinted nanocellulose adsorbing material has high adsorbability and selectivity for metal ions, and can be used for removing and recycling metal ions, such as mercury ions, lead ions and copper ions.

The invention relates to the field of medical image diagnosis and provides a preparation method and the application of macromolecule encapsulation magnetic nano-particle contrast agent. The current preparation method of superparamagnetic contrast agent is complex. The preparation of the macromolecule encapsulation magnetic nano-particle contrast agent comprises the steps as follows: iron chloride, iron dichloride and glucan are dissolved in secondary distilled water; strong ammonia is added slowly at the temperature of 15 DEG C to 40 DEG C to be constantly stirred for 130 to 150 minutes; centrifugal separation and deposition are carried out; potassium periodate solution is added; the processed solution is put into borate buffer solution with pH of 8.0; mouse anti-human CA19-9 antibody is added to be reacted at the temperature of 4 DEG C over a night; potassium borohydride is added to be reacted for 5 to 8 hours; and the mixture is purified and separated to be dispersed in buffer solution with pH of 7.4 to obtain the macromolecule encapsulation magnetic nano-particle contrast agent. The invention has the advantages that the invention improves the tumor magnetic resonance imaging contrast with good effect, has simple preparation method and is safe and convenient for use.

The method of manufacturing of 7-ethyl-10-hydroxycamptothecin of formula I characterized in that 7-ethyl-1,2,6,7-tetrahydrocampotothecin of formula IV is oxidized with an oxidizing agent selected from the group comprising iodosobenzene, an ester of iodosobenzene, sodium periodate, potassium periodate, potassium peroxodisulfate and ammonium peroxodisulfate, in a solvent formed by a saturated aliphatic monocarboxylic acid containing 1 to 3 carbon atoms, and in the presence of water.

The invention relates to a method for demonstrating a formaldehyde removing effect of a paint film with a formaldehyde removing function. Chemical reaction of the demonstration method is based on an AHMT (4-amino-3-hydrazino-5-mercapto-1, 2, 4-triazol) method for testing formaldehyde. A to-be-tested sample plate is coated with paint with a formaldehyde removing function and paint without a formaldehyde removing function, the paint is oxidized into a purple red compound by potassium periodate through condensation of formaldehyde and AHMT under an alkaline condition after dried, and the formaldehyde content is tested through colorimetric ration. According to the method for demonstrating the formaldehyde removing effect of the paint film with the formaldehyde removing function, the formaldehyde removing effect of the paint film with the formaldehyde removing function can be demonstrated in ten minutes through color change comparison and can be demonstrated to a customer rapidly and directly, the cognition on the paint with the formaldehyde removing function is enhanced further, and marketing demonstration is facilitated.

The invention relates to an autoanalysis method of iron content in water samples. In the method, operated at low pressure, an analytical instrument including a sample flow path, a coloration liquid flow path, an oxidation liquid flow path, a promotion liquid flow path, a low pressure pump, an injection valve, an injection loop, an analysis flow path, an optical flow cell, an optical detector and a computer processing system is used. The method includes the steps of: starting the analytical instrument, mapping a sample spectrum, replacing samples S1 by a series of samples S2 with known concentrations of ferrous ions or ferric ions, repeating the mapping step of the sample spectrum to obtain a series of standard spectra, drawing a working curve by taking the concentrations of standard samples as an abscissa and taking peak heights of the standard sample spectra as a vertical coordinate, comparing the drawn test sample spectra with the standard sample spectra, and calculating the iron content of the sample by a regression equation of the working curve. A coloration liquid R is a neutral red-sulfuric acid aqueous solution, an oxidation liquid O is a potassium periodate aqueous solution, and a promotion liquid C is deionized water.

The invention relates to a method for detecting trace manganese in an environmental sample, belonging to the field of a detection method of the environmental sample. The method comprises the steps of weighing 0.200g of environmental sample, and putting the environmental sample into a quartz beaker; feeding 10mL of top-grade pure nitric acid, and carrying out low-temperature decomposition; when the color of organic matter is changed into light yellow from brown, feeding 1mL of perchloric acid into the organic matter, and continuously decomposing until white smoke is not produced and the solution is nearly dry; cooling, and then decomposing by 25mL of 1% nitric acid; then, feeding 1mL of 5% potassium periodate and 2mL of concentrated nitric acid into the solution, heating and boiling; after reddish color appears, carrying out micro-boiling for 3 minutes; adjusting the pH value of the obtained solution to be 3, and pouring the solution into a conical flask, wherein 30mg of cross-linked chitosan (CCTS) which is subjected to cross linking by epichlorohydrin is contained in the conical flask; oscillating for 30 minutes on a constant temperature shaking table, and filtering; eluting the adsorbed CCTS subjected to cross-linking by epichlorohydrin by 10 drops of 10% hydroxylamine hydrochloride, and making up the volume to be 5ml; and measuring the content of manganese by a flame atomic absorption spectrometry. The method is simple, convenient, rapid, high in repeatability and low in detection limit, has an accurate result and has a relatively high practical value when being used for detecting the trace manganese in the environmental sample.

The invention relates to the field of medical image diagnosis and provides a preparation method and the application of macromolecule encapsulation magnetic nano-particle contrast agent. The current preparation method of superparamagnetic contrast agent is complex. The preparation of the macromolecule encapsulation magnetic nano-particle contrast agent comprises the steps as follows: iron chloride, iron dichloride and glucan are dissolved in secondary distilled water; strong ammonia is added slowly at the temperature of 15 DEG C to 40 DEG C to be constantly stirred for 130 to 150 minutes; centrifugal separation and deposition are carried out; potassium periodate solution is added; the processed solution is put into borate buffer solution with pH of 8.0; mouse anti-human CA19-9 antibody is added to be reacted at the temperature of 4 DEG C over a night; potassium borohydride is added to be reacted for 5 to 8 hours; and the mixture is purified and separated to be dispersed in buffer solution with pH of 7.4 to obtain the macromolecule encapsulation magnetic nano-particle contrast agent. The invention has the advantages that the invention improves the tumor magnetic resonance imaging contrast with good effect, has simple preparation method and is safe and convenient for use.

Dispersible aqueous textile treatment compositions, such as fabric softeners, which include biodegradable quaternary ammonium fabric softener actives, and which exhibit excellent long-term storage stability, even where the storage is at elevated temperatures over long periods of time. The compositions comprise a biodegradable, fatty ester quaternary ammonium compound derived from the reaction of an alkanol amine and a fatty acid derivative, followed by quaternization; together with a periodate salt, such as potassium periodate.

The invention provides a method for removing elemental mercury in a flue gas in a liquid phase. The method uses an absorbent to absorb H9O in the flue gas in a jet bubbling reactor, wherein the absorbent consists of an absorption liquid and an additive; the absorption liquid is a solution mixed by copper sulphate CuSO4 and potassium periodate KIO4; the concentration of CuSO4 is 0.001 M to 0.02 M / L, and the concentration of KIO4 is 0.001 M to 0.02 M / L; the additive is one of the following components: potassium bicarbonate KHCO3, hydrogen peroxide H2O2, potassium sulphate K2SO4 and potassium peroxydisulfate K2S2O8; and the concentration of the additive is 0.001 M to 0.05 M / L. The method can reach a removing efficiency of higher than 70 percent. The method for removing the elemental mercury in the flue gas in the liquid phase is characterized by high removing efficiency, low investment and operation costs, simple equipment, stable operation, easy treatment of product, convenient popularization and application and the like, and is suitable for large-size boilers and also suitable for medium and small-size boilers and other coal-burning equipment.

The invention relates to a rapid measurement reagent for manganese concentration in water and a use method thereof. The rapid measurement reagent for the manganese concentration in water comprises a reagent A and a reagent B in a mass ratio of 1:1, wherein (1) the reagent A comprises the following components in percentage by weight: 5.0-15.0 anhydrous potassium pyrophosphate, 10.0-30.0 disodium hydrogen phosphate, 0.5-5.0 citric acid and 60-80 anhydrous sodium sulphate; (2) the reagent B comprises the following components in percentage by weight: 5-25 potassium periodate and 75-95 potassium chloride. The use method of the rapid measurement reagent comprises the following steps: adding the reagent A to a water sample to be measured, adding the reagent B after the reagent A is dissolved; standing for 10 minutes; and comparing colors with a standard colorimetric card, a colorimetric disc or a colorimetric meter, and reading the manganese concentration. The invention has the advantages of simple and convenient operation, accurate results, low price, convenient transportation and carrying, on-site measurement suitability, and the like.

The invention relates to the technical field of coatings, in particular to a preparation method of a wear-resistant coating. The preparation method of the wear-resistant coating comprises the steps ofS1, adding hemp fiber into potassium periodate solution for shaded reaction, then immersing the reacted hemp fiber into glycerol solution, washing the immersed hemp fiber through deionized water, anddrying the washed hemp fiber to obtain modified hemp fiber; S2, mixing and dissolving lignin into dioxane aqueous solution, adding the modified hemp fiber for mixed reaction to obtain a wear-resistant agent; S3, heating a solvent, then uniformly mixing butyl acrylate, silicon dioxide, ethyl cellulose, polyester resin, the wear-resistant agent, polyacrylic acid, silicon carbide, glass fiber and afilm-forming agent, and increasing and keeping the temperature to obtain the wear-resistant coating. The prepared wear-resistant coating is excellent in wear resistance.