120 results about "Aconitic acid" patented technology

This invention has discloses a green synthesis method for carbon quantum dot bonded silica gel chromatography filler, which comprises the concrete steps of: mixing the solid powder of aconitic acid and tryptophan to be ground evenly, letting the mixture react under the temperature of 180oC- 200oC for 3 - 6 hours. Through dissolution, centrifugation and freeze drying of the generated solid, the amino-functionalized carbon quantum dots (NCDs) are obtained; After that, NCDs are dispersed in DES and added with gamma-glycidoxypropyl trimethoxy siloxane(GPTMS). Under the protection of N2 and the temperature of 55oC- 65oC, the mixture is stirred to react for 22 - 25 hours, then the silica gel (SiO2) is added to react for another 12 - 48 hours. Water and absolute ethyl alcohol are alternatively used to wash the raw product generated from the reaction. Silica gel chromatography filler modified by carbon quantum dots will be generated after drying. This green synthesis method realizes the surface bond of carbon quantum dots and silica gel through epoxy group and amino. DES used in the process of reaction is reaction solvent, which serves as an excellent dispersing agent for carbon quantum dots and silica gel, ensures higher bonded amount, and at the same time, meets the requirements of green chemistry.

An etchant composition for silver or silver alloys which comprises at least one polycarboxylic acid, phosphoric acid, nitric acid, and water. The polycarboxylic acid preferably is at least one member selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid, aconitic acid, ketoglutaric acid, maleic acid, citraconic acid, malic acid, tartaric acid, and citric acid.

An etching composition which comprises at least one organic carboxylic acid compound selected from acetic acid, propionic acid, butyric acid, succinic acid, citric acid, lactic acid, malic acid, tartaric acid, malonic acid, maleic acid, glutaric acid, aconitic acid, 1,2,3-propanetricarboxylic acid and ammonium salts of these acids, a polysulfonic acid compound and water, and an etching process which comprises etching a conductive film comprising zinc oxide as the main component using the etching composition described above.

The present invention is related to the obtaining and using of multifunctional foaming compositions with wettability modifying, corrosion inhibitory and inhibitory / dispersants mineral scale properties with high stability in environments of high temperature, high pressure and tolerance to high concentrations of divalent ions such as calcium, magnesium, strontium and barium. The multifunctional foaming compositions are obtained from the combination of supramolecular complexes resulting from interactions of alkyl amido propyl hydroxysultaines and / or alkyl amido propyl betaines and / or alkyl hydroxysultaines and / or alkyl betaines and anionic surfactant of type alkyl hydroxyl sodium sulfonate and alkenyl sulphonates of sodium, with cationic surfactants as tetra-alkyl ammonium halides and copolymers derivatives of itaconic acid / sodium vinyl sulfonate and / or terpolymers derived from itaconic acid / sodium vinyl sulphonate / aconitic acid. These multinational foaming compositions control the gas channeling and favorably change the wettability and increase the recovery factor of crude oil in naturally fractured reservoirs of carbonate type and heterogeneous lithology. In addition to this, the multifunctional foaming compositions of this invention exhibit anti-corrosive properties in typical environments of production tubing of crude oil and antifouling / dispersants of mineral salts as calcium carbonate, calcium sulfate, barium and strontium in the reservoir and in the production and injection pipelines.

The invention belongs to the field of microbe biotechnology and relates to the field of biological pesticides. Two trans-aconitic acid producing bacteria, that is, bacillus thuringiensis YBT-1501 and bacillus thuringiensis YBT-1520 are obtained from bacillus thuringiensis through screening; through utilizing the fermentation products of the two strains, the coarse and refine product of the trans-aconitic acid can be obtained; according to bioassay, the trans-aconitic acid has the activity of poisoning and killing meloidogyne incognita, heterodera glycine ichinohe and ditylenchus destructor, and the activity of suppressing the growth of cotton bollworm and housefly. The trans-aconitic acid producing bacteria are novel biological disinsection pesticides and a novel prevention and cure way for the current prevention and cure strategy is provided. The bacillus thuringiensis YBT-1501 which is used for preparing the trans-aconitic acid is preserved in the China Center for Type Culture Collection, with the serial number of CCTCC NO: M2012236.

A method of sterilizing a material, said method comprising the steps of: a) providing a sterilizing composition comprising (i) peracetic acid and (ii) a stabilizer selected from the group consisting of citric acid, isocitric acid, aconitic acid and propane-1,2,3-tricarboxylic acid; b) introducing such sterilizing composition into a hot gaseous stream to produce a peracetic acid vapor; and c) contacting such peracetic acid vapor with the material to be sterilized. The use of such an organic acid stabilizer results in an unexpected reduction in the amount of residue deposited on the heating surface employed to vaporize the sterilizing composition.

The invention belongs to the field of high polymer materials and biomedical engineering and particularly relates to a preparation method of a polyethylene glycol modified nano-micelle or a vesicle with pH (potential of hydrogen) responsivity and high drug loading capacity. The method comprises the steps of allowing polyethylene glycol and cis-aconitic acid anhydride modified doxorubicin to give areaction to generate an amphipathic segmented copolymer, and obtaining the nano-micelle or the vesicle with the pH responsivity and the high drug loading capacity by taking an anticancer drug, namelydoxorubicin as a hydrophobic chain segment and polyethylene glycol as a hydrophilic chain segment. The nano-micelle or the vesicle takes the anticancer drug as the hydrophobic chain segment, and therefore, has the higher drug loading capacity; at the same time, cis-aconitic acid anhydride is sensitive to acid; and therefore, the prepared nano-micelle or the vesicle has the pH responsivity, is applicable to the field of tumor therapy, can improve chemotherapy efficiency and reduces toxic and side effects of the anticancer drug on normal tissues.

An etching composition which comprises at least one organic carboxylic acid compound selected from acetic acid, propionic acid, butyric acid, succinic acid, citric acid, lactic acid, malic acid, tartaric acid, malonic acid, maleic acid, glutaric acid, aconitic acid, 1,2,3-propanetricarboxylic acid and ammonium salts of these acids, a polysulfonic acid compound and water, and an etching process which comprises etching a conductive film comprising zinc oxide as the main component using the etching composition described above.