37 results about "N-hexacosanol" patented technology

The invention "a grape juice Hansenula sporogenes strain QTX22 producing aroma substances and its application" belongs to the technical field of microorganisms. The one strain of grape juice Hansenula sporogenes Hanseniaspora uvarum The deposit number of strain QTX22 is CCTCC NO:M 2021083. The yield of n-hexanol produced by this strain fermented grape juice was as high as 461.27 μg / L, and the yield of phenethyl acetate was as high as 359.4 μg / L.

The invention discloses a method for directional immobilization of lipase with nanometer ferric oxide, comprising the following steps: (1) synthesizing nanometer ferric oxide by hydrothermal method, using silane coupling agent and glutaraldehyde to synthesize the nanometer ferric oxide Ferric iron tetroxide is modified; (2) lipase and interfacial activator are dissolved in the buffer solution to obtain immobilization solution, and the modified nano iron ferric oxide is added to the immobilization solution as a carrier to carry out immobilization reaction; The interfacial activator includes at least one of Tween, sucrose ester, n-hexanol, n-hexane, Triton X-100 and sodium lauryl sulfate; (3) after the immobilization reaction finishes, add to the immobilization solution Glutaraldehyde is used for cross-linking, and after the cross-linking is completed, the lipase is separated, washed and dried to obtain immobilized lipase. The immobilized lipase prepared by the invention has the advantages of high efficiency, stability, good dispersibility, easy recovery and the like.

The invention relates to a porous Se-SiO2 nanoparticle as well as a preparation method and application thereof. The porous Se-SiO2 nanoparticle consists of elementary Se, SiO2 covering the elementary Se and polyvinylpyrrolidone covering the surface of the SiO2; the preparation method comprises the following steps: firstly preparing a Cu2-xSe normal hexane dispersion liquid, and then adding de-ionized water, n-hexanol, polyethylene glycol octylphenol ether, n-hexane, tetraethyl orthosilicate and ammonia water to the Cu2-xSe normal hexane dispersion liquid; dispersing a reaction product in the de-ionized water so as to obtain a nano Se-SiO2 dispersion liquid, then adding polyvinylpyrrolidone to the nano Se-SiO2 dispersion liquid and conducting hydrothermal treatment for a certain duration so as to obtain the porous Se-SiO2 nanoparticle; and the prepared porous Se-SiO2 nanoparticle can be applied to the loading, transfer or slow release of anti-cancer drugs. Compared with the prior art, the porous Se-SiO2 nanoparticle disclosed by the invention has the advantages of good biocompatibility, good nano Se release performance, high anti-cancer drug loading rate and the like.

The invention discloses a preparation method of monodisperse water soluble ferroferric oxide nano particles; the water soluble ferroferric oxide nano particles with small size and good dispersion are prepared by use of a fractional precipitation method and combination of n-hexanol as a co precipitation solvent in the condition of relatively fast stirring speed. The preparation process has the advantages of being simple, mild in preparation conditions, controllable in preparation technology, good in repeatability, and capable of technologized production; the obtained ferroferric oxide nano particles are ultra small in size and uniform in morphology, and have good magnetic properties; the used n-hexanol can be recycled, and the cost can be saved.

The invention provides a culture system and a culture method for aerobic anaerobic bacteria to ferment with syngas. The culture system includes the following components: trace elements, zinc ions, molybdate ions and culture medium; the zinc ions are in The concentration in the culture system is 100-500 μM; the present invention uses the culture system to ferment the aerobic anaerobic bacteria, which improves the ability of the aerobic anaerobic bacteria to ferment and produce alcohols. Taking Clostridium carboxidivorans P7 as an example, the cells of the strain Concentration up to OD 600 nm~1.543Abs, the highest yield of ethanol was 2.531g / L, the highest yield of n-butanol was 0.318g / L, and the content of n-hexanol was 0.034g / L.

The present invention "a strain of C. cratonensis producing aroma substances Saccharomycopsis crataegensis Strain YC30 and its application" belong to the technical field of microorganisms. Saccharomycopsis crataegensis The deposit number of strain YC30 is CCTCC NO:M 2021089. The yield of n-hexanol produced by the strain fermented grape juice was as high as 346.05 μg / L, the output of ethyl acetate was as high as 245.19 μg / L, and the output of phenethyl acetate was as high as 253.1 μg / L.

The application relates to the technical field of medicine and chemical industry, in particular to a preparation method of 1,12-dodecanediol. A preparation method of 1,12-dodecanediol, which adopts the esterification reaction of dodecanedioic acid and n-hexanol to obtain dihexyl dodecanedioate, and then prepares the target product 1 by hydrogenation reduction, 12‑Dodecanediol. The method does not need a catalyst, reduces catalyst separation steps, realizes esterification, reduces production steps, and reduces production costs.