40results about How to "Cheap purification" patented technology

A method for preparing fluorinated organic compounds wherein at least one fluorinated olefin is reacted with methyl fluoride in the gas-phase and in the presence of a Lewis Acid catalyst to form at least one product having at least 3 carbon atoms.

The invention discloses four sets of oligonucleotide sequences for recognition and identification of vibrio anguillarum, and a screening method of the oligonucleotide sequences, and relates to the technical field of recognition detection of vibrio anguillarum. Two ends of each oligonucleotide sequence are fixed sequences, intermediate sequences are arrayed according to the order of 5'-3' as follows: a first set contains two sequences of H1 and H2, a second set contains five sequences of H5, H6, H26, H38 and H33, a third set contains three sequences of H12, H25 and H42, and a fourth set contains a sequence of H28; and any of the oligonucleotide sequences in each set serves as the intermediate sequence of an aptamer to be used for vibrio anguillarum detection. The screening method of the sequences sequentially comprises the steps of random oligonucleotide library synthesis, combination, separation, PCR amplification and high-throughput sequencing which are circulated for 3-5 rounds, andfinally, the target sequences are obtained. The sequence length of the aptamer of the vibrio anguillarum is shortened, and the screening method is quick.

The invention discloses an organic and inorganic hybrid bismuth and iodine anionic cluster-based semiconductor material and a preparation method thereof. The molecular structural formula of the organic and inorganic hybrid semiconductor material is (MV)2(Bi4I16), MV in the formula is organic cationic methyl viologen with two unit positive charges, and the (Bi4I16) anion in the material is a four-nuclear cluster structural anion composed of trivalent bismuth ions and iodide ions. Through a coordination reaction between the bismuth iodide and a solution of methyl viologen iodide, the organic and inorganic hybrid semiconductor material which is good in semiconductor performance and thermal stability is conveniently prepared with low price, the organic and inorganic hybrid semiconductor material is moderate in energy gap and good in thermal stability and can be applied to the technical field of optoelectronic materials.

The invention relates to a preparation method of esomeprazole magnesium. The method comprises the steps that: esomeprazole is dissolved in an organic solvent; a potassium-containing alkali or salt is subjected to a reaction with esomeprazole, such that esomeprazole potassium is produced; and esomeprazole potassium is subjected to a displacement reaction with a magnesium salt, such that esomeprazole magnesium is prepared. The invention also relates to a refining method of esomeprazole magnesium. With the method provided by the invention, the purity of the prepared esomeprazole magnesium is higher than 99.9%, the yield is higher than 82%, and esomeprazole magnesium has good morphological stability. With the method, requirements by factory pharmacy for purity and yield can be satisfied.

The present invention discloses (pichia pastoris) CGMCC No1622, which can produce metal protease and a manufacturing method of obtaining the bacterial strain. Through designing a DNA primer, 1005 basic group is obtained by using PCR method and increasing from the total DNA of the Bacillus licheniformis XJT9503, and then cloned on the Pmd18-T carrier, after making a sequence analysis and measure to the obtained gene, the high temperature neutral protease gene is EMP, the snatch size is 942 basic group which expresses 314 aminophenol, and a Bacillus subtilis system is made use of validating and affirming the obtained gene. The present invention provides an effective way for making the extensive ferment and production and improving the output of enzyme.

The invention discloses a purification method for blackberry anthocyanin. The purification method includes the steps of resin pretreatment and blackberry anthocyanin crude extract purification. Efficient purification of the blackberry anthocyanin can be achieved, and the purity of the obtained blackberry anthocyanin is high. According to the purification method, polyamide resin is selected as adsorbent and has the advantages that the large specific area and the large granularity are achieved, adsorption and desorption capacity is high, cost is low, regeneration is easy, and a preparation method is simple. Through research on the static and dynamic adsorption and desorption process of the blackberry anthocyanin, purification conditions are optimized, the initial concentration of the blackberry anthocyanin, the pH value of adsorption liquid, the pH value of eluent and the optimal value of ethanol concentration are determined, and the adsorption rate and the elution rate of the blackberry anthocyanin are both high. According to the method, time-saving and efficient purification of the blackberry anthocyanin can be achieved, purification time can be shortened, and cost can be reduced.

The present invention is directed to methods of preparing linear polymers such as polyalkylene oxides containing a terminal amine in high purity. One preferred method includes reacting a polyalkylene oxide such as polyethylene glycol containing a terminal azide with a phosphine-based reducing agent such as triphenylphosphine or an alkali metal borohydride reducing agent such as sodium borohydride in a solvent to reflux. The resultant polymer-amines are of sufficient purity so that expensive and time consuming purification steps required for pharmaceutical grade polymers are avoided.

The invention provides a matrix dispersion purification tube for phthalate ester detection, and relates to development of a pretreatment purification tube for detecting various phthalate esters in different matrixes. A purification process of the tube comprises: (1) based on different matrixes, placing a filler in an empty purification tube according to a ratio regulated by a requirement; (2) selecting appropriate extraction solvents to extracted various phthalate esters according to the different matrixes; (3) pouring the extracted phthalate ester solutions into an extraction tube; and (4) after completely mixing, purifying the filler, removing interferents, centrifugating for 5 min at a speed of 4000 r / min, taking the supernatant, and analyzing. With the matrix dispersion purification tube, the phthalate esters in various matrixes can be rapidly and cheaply purified, characteristics of economy, environmental protection and stability are provided, GPC instrument purification is not required, and analysis accuracy and no damage on the instrument are ensured.

The present invention is directed to methods of preparing linear polymers such as polyalkylene oxides containing a terminal amine in high purity. One preferred method includes reacting a polyalkylene oxide such as polyethylene glycol containing a terminal azide with a phosphine-based reducing agent such as triphenylphosphine or an alkali metal borohydride reducing agent such as sodium borohydride in a solvent to reflux. The resultant polymer-amines are of sufficient purity so that expensive and time consuming purification steps required for pharmaceutical grade polymers are avoided.

The present invention is directed to methods of preparing linear polymers such as polyalkylene oxides containing a terminal amine in high purity. One preferred method includes reacting a polyalkylene oxide such as polyethylene glycol containing a terminal tosylate with a protected amine salt to form a polymer containing a terminal protected amine and thereafter deprotecting the polymer containing the terminal protected amine to form the polymer having a terminal amine. The resultant polymer-amines are of sufficient purity so that expensive and time consuming purification steps required for pharmaceutical grade polymers are avoided.

Compositions for eliciting an immune response against Gram-negative bacterial infections and methods of making such compositions are provided. The composition comprises glycosylated pilin, the pilin being glycosylated with the O-antigen of a target Gram-negative bacteria of interest. Methods of eliciting an immune response by administration of such compositions are also provided.

The invention provides a varicella-herpes zoster mRNA vaccine composition, and a preparation method and application thereof. The vaccine composition comprises a messenger ribonucleic acid (mRNA) sequence for coding varicella-herpes zoster virus glycoprotein E, a derivative sequence of the messenger ribonucleic acid (mRNA) sequence and lipid nanoparticles (LNP), and the messenger ribonucleic acid (mRNA) sequence is prepared into particles with the diameter of 20-400 nanometers through microfluidic equipment. The vaccine composition can specifically enhance humoral immune response and cellular immune response against varicella-herpes zoster glycoprotein E, can be used as a varicella vaccine which does not cause latent infection of vaccine strains, and can also be used as a herpes zoster vaccine with unlimited productivity. All the components in the vaccine composition can be widely obtained, so that the vaccine cost is effectively reduced, and the vaccine yield is increased.

The invention provides a method for preparing long-chain fatty acid monobenzyl ester. The method comprises the following steps: 1) carrying out esterification reaction on long-chain fatty diacid to obtain long-aliphatic chain dibenzyl ester; and 2) carrying out hydrolysis reaction on the long-aliphatic chain dibenzyl ester to obtain long-chain fatty diacid monobenzyl ester; wherein the long-chainfatty diacid has a structure shown as formula (A), and X is an integer of 6-32. Compared with the prior art, the method has the advantages of cheap and easily available reaction reagent, simple operation, low product related impurity content, simple intermediate purification, short production period, high yield, low cost, little generated waste liquid, no generation of solid waste and low environmental protection pressure.

Compositions for eliciting an immune response against Gram-negative bacterial infections and methods of making such compositions are provided. The composition comprises glycosylated pilin, the pilin being glycosylated with the O-antigen of a target Gram-negative bacteria of interest. Methods of eliciting an immune response by administration of such compositions are also provided.

The invention discloses an enhanced CH2 structure domain mutant combined with a newborn Fc receptor as well as a preparation method and application thereof. According to the enhanced CH2 structure domain mutant combined with the newborn Fc receptor as well as the preparation method and application thereof disclosed by the invention, amino acid neighbouring to a helical area which interacts with FcRn in a CH2 structure domain of a constant area of a human antibody IgG is mutated to obtain the enhanced CH2 structure domain mutant. Relative to a wild type CH2 structure domain, the mutant disclosed by the invention has higher stability and anti-gathering ability, and has the advantages that the production, purification and storage costs of a monoclonal antibody or Fc fusion protein can be reduced; the CH2 structure domain mutant is combined with pH dependency of FcRn so that enhancement is achieved, and a good basis is laid for searching a novel single-domain antibody drug using the enhanced CH2 structure domain mutant as a framework.

The invention discloses an anti-aggregation humanized IgG (immunoglobulin G) antibody CH2 structural domain mutant and an application. A CH2 fragment of an IgG antibody serves as an object; an easy aggregation area is predicted on a basis of the existing transformation framework m01s; and further optimization is performed to form a new framework m01sm1. M01sm1 has higher stability than the mutantm01s; the development of a more stable C single domain antibody is facilitated; production, purification and storage cost of a monoclonal antibody or Fc fusion protein can be lowered; the anti-aggregation ability of m01sm1 is better; and clinical use risks caused by protein aggregation can be reduced.

The invention relates to a purification method of an iron-chromium electrolyte and the iron-chromium electrolyte obtained by the purification method. According to the purification method of the iron-chromium electrolyte, harmful metal ions can be simply and effectively removed, hydrogen evolution side reaction is avoided, the production cost of the electrolyte is greatly reduced, and the purification method has extremely high practical application value.

Provided are a cell model and screening method for screening inhibitors of the tubercle bacillus. Provided is a cell which expresses the tubercle bacillus proteins L12 and L10, wherein the L12 encoding gene and the transcription activation domain of its transcription factor are located in one expression vector, and the L10 encoding gene and the DNA binding domain of its transcription factor are located in another expression vector. The present invention also relates to the use of the compound shown in formulae I or II in preparing a blocker of the interaction between proteins L12 and L10 of tubercle bacillus, an anti-tubercle bacillus drug, or a drug for treating and / or preventing tuberculosis.

The invention relates to a preparation method of esomeprazole magnesium. The method comprises the steps that: esomeprazole is dissolved in an organic solvent; a potassium-containing alkali or salt is subjected to a reaction with esomeprazole, such that esomeprazole potassium is produced; and esomeprazole potassium is subjected to a displacement reaction with a magnesium salt, such that esomeprazole magnesium is prepared. The invention also relates to a refining method of esomeprazole magnesium. With the method provided by the invention, the purity of the prepared esomeprazole magnesium is higher than 99.9%, the yield is higher than 82%, and esomeprazole magnesium has good morphological stability. With the method, requirements by factory pharmacy for purity and yield can be satisfied.

The invention provides a cefminox sodium preparation method, which comprises: (1) dispersing a compound having a structure represented by a formula (VII) in an organic solvent A to prepare a solutionor a suspension, adding a compound having a structure represented by a formula (VII), and carrying out vacuum drying to obtain a compound having a structure represented by a formula (VI); (2) dispersing the compound with the structure represented by the formula (VI) into an organic solvent C, adding a compound having a structure represented by a formula (V) in a dropwise manner, and drying to obtain a compound having a structure represented by a formula (IV); (3) dispersing the compound having the structure represented by the formula (IV) in an organic solvent, and removing the solvent by rotary evaporation under a pressure reducing condition to obtain an organic phase containing a compound having a structure represented by a formula (II); and (4) adding purified water into the solution containing the compound having the structure represented by the formula (II), heating, adjusting the pH value, adding a compound having a structure represented by a formula (III), carrying out temperature control stirring, transferring the water phase into a crystallizing tank, crystallizing, and carrying out pressure reducing drying to obtain the cefminox sodium heptahydrate. According to the invention, the synthesis process is shortened, the cost is reduced, and the product yield and the purity are high.

The invention discloses a method for creating a new material of hypoglycemic transgenic rice. The method comprises the following steps: introducing an expression cassette of an endosperm specific expression 10 * mGLP-1 gene into a plant, and screening to obtain a transgenic plant of which the endosperm specifically expresses the 10 * mGLP-1 gene; the expression cassette for endosperm specific expression of the 10 * mGLP-1 gene comprises a plant endosperm specific promoter and the 10 * mGLP-1 gene connected to the downstream of the plant endosperm specific promoter. The method can endow the seeds with a health-care function, is suitable for large-scale production of the hypoglycemic oligopeptide, and can be used for cultivating transgenic crops with high hypoglycemic oligopeptide content in the stably inherited seeds.

The present invention discloses an AEM membrane electrode, an AEM electrolyzer and an electrolytic hydrogen production method, and belongs to the technical field of electrolytic hydrogen production. The AEM membrane electrode of the present invention is a vertical structure, which includes an anode collector mass transfer catalytic layer, an anion exchange membrane, a cathode catalytic layer and a cathode collector mass transfer layer from top to bottom; the AEM electrolyzer includes an anode end plate, a plurality of electrolysis chambers and a cathode end plate from top to bottom; each adjacent electrolysis chamber is isolated by a yin-yang composite plate; the anode surface of the yin-yang composite plate is connected to the alkali solution inlet and the alkali solution outlet, and the cathode surface of the yin-yang composite plate is connected to the hydrogen outlet; the electrolysis chamber includes an AEM membrane electrode, and its anode collector mass transfer catalytic layer contacts the anode surface of the yin-yang composite plate, and the cathode collector mass transfer layer contacts the cathode surface of the yin-yang composite plate. The membrane electrode of the present invention has better operating stability and more efficient hydrogen production performance, the electrolyzer has high gas production purity and high equipment safety, the water content of hydrogen is low, and the gas purification and drying cost is low.

The invention provides a method for preparing long-chain fatty diacid monobenzyl ester. The method comprises: 1) carrying out an esterification reaction with a long aliphatic chain diacid to obtain a long aliphatic chain dibenzyl ester; 2) carrying out a hydrolysis reaction of the long aliphatic chain dibenzyl ester so as to obtain a long chain aliphatic diacid monobenzyl ester; Wherein, the long aliphatic chain diacid has a structure represented by formula (A), and X is an integer of 6-32. Compared with the prior art, the method has the advantages of cheap and easily available reaction reagents, simple operation, low product-related impurity content, simple purification of intermediates, short production cycle, high yield, low cost, less "waste liquid" and no solid waste. Generated, low environmental pressure. .

The present invention discloses (pichia pastoris) CGMCC No1622, which can produce metal protease and a manufacturing method of obtaining the bacterial strain. Through designing a DNA primer, 1005 basic group is obtained by using PCR method and increasing from the total DNA of the Bacillus licheniformis XJT9503, and then cloned on the Pmd18-T carrier, after making a sequence analysis and measure to the obtained gene, the high temperature neutral protease gene is EMP, the snatch size is 942 basic group which expresses 314 aminophenol, and a Bacillus subtilis system is made use of validating andaffirming the obtained gene. The present invention provides an effective way for making the extensive ferment and production and improving the output of enzyme.

The invention discloses a method for separating and purifying fructooligosaccharides, wherein separating and purifying steps include: fermenting cane sugar through Phaffia rhodozyma JMU-MVP14 to obtain a fermentation fluid containing the fructooligosaccharides and astaxanthin; centrifugally separating the fermentation fluid through a centrifuge, extracting the lower-layer astaxanthin, heating the supernatant fluid through a boiling water bath for enzyme inactivation and then purifying the supernatant fluid through a microfiltration membrane, wherein the obtained filtrate flows through a chromatographic column filled with an absorption medium to be absorbed; next, eluting the absorption medium using ethanol solution; and evaporating and concentrating the eluate to obtain the fructooligosaccharides. The method is capable of simultaneously separating and purifying the fructooligosaccharides and the astaxanthin in the same batch of fermentation process; the separation operation is low in cost and simple; the obtained fructooligosaccharide product is high in content and meets the requirements of food sanitation.

The invention discloses a preparation method and application of degradable hyperbranched polyamidoamine. Degradable hyperbranched polyamidoamine is prepared by taking a bifunctional monomer containing a disulfide bond or a ketal bond and an amino-containing trifunctional monomer N-aminoethylpiperazine (AEPZ) or diethylenetriamine (DETA) as main raw materials and employing a one-pot method to perform Michael addition polymerization reaction. By coupling polyethylene glycol (PEG) and folic acid (FA) with degradable hyperbranched polyamidoamine, folic-acid-targeted PEGylated degradable hyperbranched polyamidoamine is obtained. The raw materials are easily available, the preparation method is simple, and the prepared polymer medicine carrier has the advantages of hyperbranched polyamidoamine, such as three-dimension branching structure, a lot of cavities at the interior of molecules, low viscosity, a lot of functional groups, simple preparation method, biodegradability, and the like. Additionally, the water solubility and the stability of the carrier material are improved by grafting a PEG chain segment to the terminal, and the carrier is endowed with active targeting property on tumor cells through coupling of FA.

The invention discloses a preparation method of carbon nano-tube / hydroxyapatite composite powder, and belongs to the preparation technology of hydroxyapatite composite matrix composite material. The processes of the method are as follows: ferric nitrate and hydroxyapatite powder are taken as raw materials, according to a certain mass ratio, a deposition-sedimentation method is adopted to prepare Fe / HA catalytic agent precursor Fe2O3 / HA, the precursor Fe2O3 / HA is utilized to prepare CNTs / HA composite powder with nitrogen gas and methane as reaction gases and through a chemical gas phase deposition method under a certain temperature. The invention has the advantages that the preparation process is simple, and the catalytic agent adopted is no poisoning to the human body; the quality of the carbon nano-tube in the power body is good, the purity rate is high, and the size is even; the carbon nano-tube is dispersed evenly in the hydroxyapatite power body, and the combination of the carbon nano-tube with the matrix is good; the power body is the ideal raw material to prepare the composite material of the CNTs / HA.

The invention relates to a method for purifying an iron-chromium electrolyte and the iron-chromium electrolyte obtained therefrom. The method for purifying the iron-chromium electrolyte of the invention can simply and effectively remove harmful metal ions, avoid side reactions of hydrogen evolution, greatly reduce the production cost of the electrolyte, and have extremely high practical application value.

The present invention is directed to methods of preparing linear polymers such as polyalkylene oxides containing a terminal amine in high purity. One preferred method includes reacting a polyalkylene oxide such as polyethylene glycol containing a terminal azide with a phosphine-based reducing agent such as triphenylphosphine or an alkali metal borohydride reducing agent such as sodium borohydride in a solvent to reflux. The resultant polymer-amines are of sufficient purity so that expensive and time consuming purification steps required for pharmaceutical grade polymers are avoided.