43 results about "Penicillamine" patented technology

The invention provides a penicillamine sustained-release preparation. The release rate of the penicillamine sustained-release preparation is adjusted through a specific sustained-release coating. Unexpectedly, the release rate can be obviously improved by adding a small amount of lactose. More unexpectedly, in the prescription system provided by the invention, under the condition that the weight gain of the sustained-release coating is the same, the penicillamine sustained-release preparation which can be released for 12 hours or 24 hours can be respectively obtained only by adjusting the content of lactose, that is, the release rate of the penicillamine sustained-release preparation in 12 hours or 24 hours can reach 85% respectively. According to the penicillamine sustained release preparation provided by the invention, the medication compliance can be improved, and the blood concentration fluctuation can be reduced.

The invention provides a method for determining the content of penicillamine enantiomers by pre-column derivatization liquid chromatography, namely a method for detecting L-penicillamine in D-penicillamine or a method for detecting D-penicillamine in L-penicillamine, derivatization is carried out under conventional alkaline conditions, a termination reaction is carried out by conventional acid, the derivatization steps are simplified, the detection efficiency is improved, and the detection cost is reduced. According to the method, various interferences of other amino acids and corresponding isomers in the raw materials can be effectively avoided due to the gradient of the mobile phase, the damage to a chromatographic column is well reduced due to the fact that conventional reagents such as phosphoric acid and acetonitrile serve as the mobile phase, and the method is easy to operate, high in sample preparation speed and high in accuracy. The method has the advantages of strong anti-interference capability, good separation effect, high sensitivity, accurate result and good stability, realizes effective separation of penicillamine isomers, has a separation degree of greater than 2, can perform content determination on another main drug while performing impurity detection on one isomer, and has good practicability.

The invention relates to an aqueous zinc-iodine battery electrolyte containing an amino acid additive and a preparation method and application thereof, and belongs to the technical field of aqueous zinc-iodine batteries. The preparation method of the aqueous zinc-iodine battery electrolyte containing the amino acid additives comprises the following steps: fully stirring and mixing zinc salt, D-penicillamine and deionized water according to a certain proportion to obtain the aqueous zinc-iodine battery electrolyte containing the amino acid additives. The amino acid-containing additive D-penicillamine used in the invention is preferentially coordinated with I-, and due to the lack of free I-in the reaction, the generation of polyiodide and the dissolution of I2 are inhibited, so that the shuttle effect is inhibited; the amino acid-containing additive D-penicillamine also participates in a Zn < 2 + > solvation sheath layer, so that the tendency of desolvation and Zn < 2 + > migration is improved, and the generation of zinc negative electrode byproducts is inhibited; in addition, the aqueous zinc-iodine battery electrolyte containing the amino acid additive D-penicillamine is simple in preparation method and low in cost.

The invention relates to the technical field of hydrogel materials, in particular to NO controlled release polyvinyl alcohol / sodium alginate hydrogel and a preparation method thereof. The preparation method comprises the following steps: mixing and stirring a polyvinyl alcohol solution and a sodium alginate solution to obtain a mixed solution; s-nitroso-N-acetyl-penicillamine and graphene oxide are added into the mixed solution, the obtained solution is poured into a mold, hydrogel is obtained after freezing, the hydrogel is taken out of the mold and unfrozen at the room temperature, freezing and thawing cycles are repeated, and the polyvinyl alcohol / sodium alginate hydrogel capable of controllably releasing NO is obtained. According to the NO controlled release polyvinyl alcohol / sodium alginate hydrogel and the preparation method thereof, the prepared NO controlled release polyvinyl alcohol / sodium alginate hydrogel has excellent antibacterial property, conductivity, slow release property, mechanical property and biocompatibility, and the technical problems that existing hydrogel is insufficient in mechanical property and poor in antibacterial property are solved.

The invention discloses a chiral precious metal nanocage induced and synthesized by penicillamine and a preparation method and application thereof, precious metals in the chiral precious metal nanocage are palladium, platinum and gold, the molar ratio of palladium to platinum to gold is (16-18): (24-28): (56-59), and the chiral precious metal nanocage has three-dimensional chiral morphology characteristics induced by penicillamine chiral molecules. And the edge length is in a nanometer size. Chiral deposition growth of gold atoms in two palladium-platinum nanometer hollow frame structures (cubes and icosahedrons) is induced through chiral penicillamine molecules (D- / L-penicillamine), and a chiral precious metal palladium-platinum-gold three-element hollow nanometer cage structure is constructed. The structure shows excellent catalytic activity on selective catalytic oxidation of D-configuration glucose molecules. The invention provides an efficient, low-cost and high-reliability biomimetic catalytic material solution for glucose detection, and promotes the upgrading of diabetes management, biosensing and food quality control technologies.

The invention discloses a chiral amino acid CPL probe based on an aldehyde group functionalized luminescent rare earth spirochete complex as well as a preparation method and application thereof, and belongs to the technical field of biosensing materials. The invention aims to solve the problem that the existing probe has poor selectivity in recognition of sulfydryl amino acid. The chiral amino acid CPL probe is an aldehyde group functionalized water-soluble lanthanide helical complex, side chain aldehyde groups can enhance the water solubility of the helical complex by forming hemiacetal and can also be used as specific recognition sites, the aldehyde groups react with sulfydryl-containing amino acids such as D-penicillamine and L-cysteine to form thiazolidine rings, and the chiral amino acid CPL probe can be used as a specific recognition site. Furthermore, the chirality of D-PA and L-Cys is triggered to be transmitted to a metal center, and the chirality is amplified into a detectable CPL signal. Thiazolidine rings formed by condensation of different amino acids have steric hindrance differences, and the steric hindrance differences can influence spiral chirality, so that the probe still shows excellent selectivity even in a complex system in which a plurality of interfering substances coexist.

This invention relates to the field of fluorescence detection technology, specifically disclosing a dual-colorimetric fluorescent probe for detecting methyl orange, its preparation method, and its application. The probe is prepared by in-situ synthesis of carbon dots and copper nanoclusters. The carbon dots are synthesized from Bermuda grass as a precursor via a hydrothermal method, and the copper nanoclusters are obtained by reducing copper ions with penicillamine and bovine serum albumin as dual stabilizers. The dual-colorimetric fluorescent probe provided by this invention has a detection limit for methyl orange as low as 0.06 μM, exhibiting good selectivity, stability, and anti-interference ability. It can be applied to the spiked recovery detection of methyl orange in actual water samples and can achieve visualized semi-quantitative analysis through filter paper loading, making it suitable for rapid on-site screening.

The invention belongs to the technical field of nano material preparation, and provides a preparation method of chiral nano mercuric sulfide. The preparation method comprises the following steps: mixing water-soluble mercury salt, chiral penicillamine, inorganic base and water to obtain a precursor solution; mixing the chiral mercuric sulfide seed dispersion liquid, chiral penicillamine and inorganic base to obtain a seed solution; and sequentially adding the precursor solution and thioacetamide into the seed solution, carrying out a reaction, and after the reaction, adding isopropanol to obtain the chiral nano mercuric sulfide, the chiral mercuric sulfide seed dispersion liquid is prepared from water-soluble mercury salt, chiral penicillamine, inorganic base and thioacetamide through a self-assembly reaction. According to the preparation method disclosed by the invention, the precursor solution containing the water-soluble mercury salt and the chiral penicillamine, the chiral mercury sulfide seed dispersion liquid, the chiral penicillamine and the inorganic base are combined, so that the chiral nanometer mercury sulfide with chirality and good dispersity is obtained; meanwhile, the obtained chiral nanometer mercuric sulfide is in a ray shape.

The invention provides a chiral MXene solution as well as a preparation method and application thereof. The chiral MXene solution is prepared from the following raw materials: MXene, a chiral ligand and a solvent, the chiral ligand comprises any one or a combination of at least two of L / D-cysteine, L / D-tartaric acid, L / D-malic acid and L / D-penicillamine. According to a universal method for combining different types of MXene (such as Ti3C2, TiVC, VNbC, V2C, Ti3CN and the like) with chiral ligands (such as L / D-cysteine, L / D-tartaric acid, L / D-malic acid and L / D-penicillamine) through a chemical modification means, the ligand active groups (-SH,-COOH and-NH2) are directionally bonded with the MXene, so that an adjustable chiral characteristic is given to the MXene, and the stability and the functional applicability of the MXene are remarkably improved.

The invention discloses preparation and application of a nano enzyme. The preparation method of the nano enzyme comprises the following steps: dissolving copper salt and hydroxy anthraquinone carboxylic acid in water to obtain a first solution; adjusting the pH of the first solution to be alkaline, and heating for reaction to obtain a product solution; and centrifuging the product solution, taking the precipitate, washing and drying to obtain the Cu nano-enzyme. The copper salt comprises at least one of copper sulfate, copper chloride, copper nitrate and copper hydroxide; the hydroxy anthraquinone carboxylic acid is rhein. According to the invention, Cu is used as a transition metal source and reacts with specific hydroxy anthraquinone carboxylic acid to prepare the Cu nano-enzyme (Cu-Rhein) with excellent peroxidase-like activity. The Cu nano enzyme can be applied to promotion of hydrogen peroxide oxidation TMB color development and detection of penicillamine, the accuracy of penicillamine detection is high, and the Cu nano enzyme has good application prospects.

The invention discloses an amphiphilic block copolymer self-assembled prodrug based on D-penicillamine as well as a preparation method and application of the amphiphilic block copolymer self-assembled prodrug. The amphiphilic block copolymer self-assembled prodrug based on D-penicillamine has a structure as shown in a formula (I). The preparation method comprises the following steps: synthesizing an amphiphilic block copolymer easy for sulfydryl modification, carrying out solution self-assembly to form vesicles, and modifying D-penicillamine to prepare the D-penicillamine prodrug polymer vesicles. According to the invention, the exchange reaction of a sulfydryl disulfide bond is creatively applied, the D-penicillamine with copper consumption capacity is connected through the disulfide bond to form a macromolecular prodrug, the method provides a new solution for the chemical modification problem of multi-active-functional-group drugs, and breaks through the delivery mode of physically encapsulating the D-penicillamine by nanoparticles; the stability and toxic and side effects of the D-penicillamine are improved. In addition, the D-penicillamine prodrug polymer vesicle can entrap other drugs, and has the potential of copper consumption combined therapy.

The invention belongs to the technical field of biological medicine, and particularly relates to a nanometer drug delivery system with a tumor deep penetration effect and a preparation method and application of the nanometer drug delivery system. The polylactic acid-glycolic acid nano-particles are polylactic acid-glycolic acid copolymer nano-particles entrapped with chemotherapeutic drugs and carbon monoxide donors; the chemotherapeutic drug is monomethyl aurestatin E, and the carbon monoxide donor is S-nitroso-N-acetyl-DL-penicillamine; a lipid layer; the core is coated with the core; the targeting polypeptide is modified on the surface of the lipid layer; the targeting polypeptide is an R4F polypeptide; tumor cells are actively targeted through R4F polypeptide, the polylactic acid-glycolic acid copolymer nanoparticles wrapped by a lipid layer deeply penetrate into tumor tissues, nitric oxide is released through a carbon monoxide donor to degrade an extracellular matrix barrier, and deep penetration of loaded chemotherapeutic drugs and immune cells in the tumor tissues is synergistically promoted; the nano drug delivery system provided by the invention can be applied to preparation of drugs for treating solid tumors and delivery of drugs for targeting extracellular matrixes of the solid tumors.

The application discloses a preparation method of high-purity Fmoc-S-trityl-L-penicillamine and belongs to the field of synthetic chemistry. The method is characterized in that L-penicillamine is used as a starting material, dehydrated with methyl boronic acid to generate a cyclic protective structure, then a thiol group is selectively protected by trityl, and an acid is used to open a ring to obtain an S-trityl-L-penicillamine intermediate; then, in a sodium bicarbonate buffered water / dioxane weak alkaline system, Fmoc-OSu (9-fluorenylmethoxycarbonyl succinimidyl ester) is used to react with the S-trityl-L-penicillamine intermediate to protect an amino group, and racemization is effectively inhibited; finally, the product is refined by recrystallization in an ethyl acetate / n-heptane system to obtain a high-purity end product. The process route is simple and efficient, the conditions are mild, the purification method is unique and effective, the obtained product has high chemical purity and optical purity, good stability, is suitable for large-scale production, and can meet the needs of high-end polypeptide drug synthesis.

The application discloses a process method for preparing D-penicillamine by using an acidic cation resin. The application provides a preparation method of D-penicillamine, which comprises the following steps: compound 1 is reacted with hydrazine hydrate to obtain compound 2, and ring-opening reaction is carried out in the presence of an acidic cation resin to obtain compound 3. The method disclosed by the application does not need to remove inorganic salts separately, effectively reduces the impurities generated by oxidation, and has the advantages of simple operation, high yield, low cost and suitability for industrial production.

The application belongs to the technical field of carbon nanomaterial application, and particularly relates to chiral carbon nanomaterial for preventing and treating tobacco mosaic virus and a preparation method and application thereof. The application mainly solves the problem of poor virus prevention and treatment effect caused by easy inactivation and inability to continuously act of carbon nanomaterial in the existing method for preventing and treating plant virus based on carbon nanomaterial. The application relates to D-penicillamine modified carbon dots, which can destroy the protein shell of tobacco mosaic virus under right circular polarized light irradiation, inactivate the tobacco mosaic virus, and thus lose the infectivity, so as to achieve the purpose of preventing and treating tobacco mosaic virus. The application has the advantages of high stability, sustainable action and excellent virus prevention and treatment effect.

This invention discloses a chiral CuO / HgS heterojunction catalyst, its preparation method, and its application, belonging to the field of inorganic chiral materials technology. The chiral CuO / HgS heterojunction includes D-CuO / D-HgS heterojunction, L-CuO / L-HgS heterojunction, D-CuO / L-HgS heterojunction, and L-CuO / D-HgS heterojunction. Its preparation method includes: (1) preparing chiral CuO powder using a liquid-phase synthesis method with chiral cysteine ​​and CuCl2; (2) obtaining chiral HgS crystal nuclei by reacting Hg(NO3)2 solution with chiral penicillamine and thioacetamide, and dispersing them in water to obtain chiral HgS seed colloids; (3) synthesizing chiral CuO / HgS heterojunctions using a seed-mediated epitaxial growth method. Using the prepared chiral material for photocatalytic CO2 reduction can yield high-value-added C2 and C3 products, achieving efficient energy utilization.

The invention discloses a preparation method of a D-penicillamine molecular imprinting sensor based on HSA-assisted recognition, which relates to the technical field of molecular imprinting sensors. The preparation method comprises the following steps: S1. polishing a bare gold electrode on a suede surface with aluminum oxide polishing powder, placing the polished gold electrode in a nitric acid solution, anhydrous ethanol, and secondary water in sequence for ultrasonication, using a potassium ferrocyanide solution as a probe molecule, and measuring by cyclic voltammetry until the voltage response value of the gold electrode is less than 120 mV to obtain a cleaned gold electrode; S2. modifying the cleaned gold electrode with a cysteine ​​solution, then with a glutaraldehyde solution, immersing the washed gold electrode in a human serum albumin solution for carbonyl and amino group binding, and immersing the electrode in a D-penicillamine solution for binding and recognition to obtain a gold electrode modified with an HSA-D-Pen complex; S3. immersing the electrode in an o-phenylenediamine solution for pre-assembly and electropolymerization to obtain an imprinted polymer-modified gold electrode; and S4. placing the imprinted polymer-modified gold electrode in a PBS buffer solution for elution.

The present invention discloses a Cu-based 2+ A method for colorimetric and fluorescent dual-mode detection of D-penicillamine content in penicillamine tablets using OPD is provided, comprising the steps of: taking an OPD solution, adding water and a CuCl2 solution, fixing the volume, and mixing to obtain a reference solution, wherein the absorbance is determined as A0 and the fluorescence intensity is determined as F0; taking multiple OPD solutions, adding D-penicillamine solutions of different concentrations to each OPD solution, and then adding a CuCl2 solution, fixing the volume, and mixing to obtain multiple standard solutions, wherein the absorbance of the multiple standard solutions is determined as A and the fluorescence intensity is determined as F; drawing a standard curve with the concentration of the D-penicillamine solution as the horizontal axis and the relative absorbance intensity / relative fluorescence intensity as the vertical axis; measuring the absorbance and fluorescence intensity of the solution to be tested, and substituting the absorbance and fluorescence intensity of the solution to be tested into the standard curve equation to obtain the D-penicillamine concentration in the solution to be tested. The present invention has the advantages of simple and easy-to-obtain detection reagents, simple operation, short experimental reaction time, and high reliability of the results.

The invention relates to the technical field of hydrogel materials, in particular to polyvinyl alcohol / sodium alginate / hydroxyapatite hydrogel and a preparation method thereof. The invention relates to a preparation method of polyvinyl alcohol / sodium alginate / hydroxyapatite hydrogel, which comprises the following steps: mixing and stirring a polyvinyl alcohol solution and a sodium alginate solution to obtain a mixed solution, adding hydroxyapatite and boric acid into the mixed solution, and standing to obtain hydrogel; s-nitroso-N-acetyl-penicillamine and graphene oxide are added into the hydrogel, and the polyvinyl alcohol / sodium alginate / hydroxyapatite hydrogel is obtained. According to the polyvinyl alcohol / sodium alginate / hydroxyapatite hydrogel and the preparation method thereof, the prepared polyvinyl alcohol / sodium alginate / hydroxyapatite hydrogel has excellent antibacterial property, conductivity, slow release property and mechanical property, is suitable for being used as a flexible conductive material, and solves the technical problem that the existing hydrogel is poor in antibacterial property and conductivity.

The invention relates to application of S-nitroso acetylpenicillamine in preparation of a medicine for promoting hair growth or treating alopecia, and belongs to the technical field of new application of medicines. Experimental research shows that S-nitroso acetylpenicillamine can effectively prevent alopecia, promote hair growth and treat different types of alopecia diseases. The prepared SNAP spray is used for a common alopecia mouse model and shows a good effect of promoting hair growth of common alopecia mice. The SNAP ointment and the SNAP spray are used for an androgen-derived alopecia mouse model, both the SNAP ointment and the SNAP spray show good hair regeneration promoting capacity, and the symptom of the androgen-derived alopecia disease is effectively improved.

The present invention relates to a preparation method and application of copper cobalt sulfide nanoflowers with chiral optical activity, belonging to the technical field of material chemistry. It directly prepares copper cobalt sulfide nanoflowers by a one-step method using a copper ion solution, a cobalt ion solution, a thioacetamide solution and penicillamine. The copper cobalt sulfide nanoflowers synthesized by the present invention have mirror-symmetric chiral optical activity, and the preparation method is simple and the enantioselective catalytic performance is excellent. The prepared material has important significance for promoting the development of fields such as food industry wastewater treatment, edible mushroom production, papermaking and textile, organic synthesis, and bioenergy.

The invention provides a kit for detecting homocysteine and metabolites thereof in serum. The kit comprises a calibrator and a sample releasing agent, the calibrator comprises a component 1 and a component 2; the component 1 comprises a BSA (Bovine Serum Albumin) matrix and a first protective agent; the component 2 comprises homocysteine, metabolite of the homocysteine and a second protective agent; each of the first protective agent and the second protective agent is prepared from ascorbic acid, dithiothreitol, N-acetyl-DL-penicillamine and EDTA (Ethylene Diamine Tetraacetic Acid). According to the present invention, the 5-methyltetrahydrofolic acid and the homocysteine which are easily oxidized are well protected, and the synchronous detection of the folic acid, the 5-methyltetrahydrofolic acid, the vitamin B2, the pyridoxal phosphate, the methylmalonic acid, the homocysteine and the methionine is achieved. The kit has good stability at 4 DEG C and can meet the use requirement.

This invention relates to the field of nanomaterials technology and discloses a chiral Cu 2‑x S-quantum dots, their preparation methods, and applications: In an aqueous phase, a copper source and a complexing agent are mixed and reacted to obtain a copper complex solution. A sulfur source and a dextrorotatory penicillamine chiral ligand are added to the copper complex solution. The mixed reaction solution is heated to carry out nucleation and growth reactions. After centrifugation and drying of the precipitate, chiral Cu with high photothermal conversion efficiency is obtained. 2‑x S-quantum dots. This invention is the first to use dextrorotatory penicillamine, which has a significant steric hindrance effect, as a chiral ligand during the growth of quantum dots. Its unique molecular structure induces the formation of a specific surface coordination environment and chiral structure. This structure can significantly enhance the absorption of near-infrared light by quantum dots and promote the non-radiative relaxation conversion of light energy into heat energy, greatly improving photothermal conversion performance. This provides an efficient and feasible technical solution for the practical application of chiral quantum dots in the field of tumor photothermal therapy.

The invention provides a chalcopyrite combined inhibitor and application thereof, and particularly relates to the technical field of copper sulfide molybdenum ore beneficiation. The combined inhibitor comprises penicillamine and trithiocyanuric acid, floating of the chalcopyrite is inhibited in the copper-molybdenum separation flotation process by adding the combined inhibitor, and therefore the floatability difference between molybdenite and the chalcopyrite is enlarged, and separation of the chalcopyrite and the molybdenite is achieved. According to the copper-molybdenum sulfide flotation separation combined inhibitor, the defects that a traditional copper-molybdenum flotation separation inhibitor is high in toxicity, harmful to the natural environment and the like are overcome, meanwhile, the remarkable flotation effect is achieved in separation flotation of copper-molybdenum sulfide ore, and the novel efficient combined inhibitor is provided for efficient utilization of copper-molybdenum ore resources.

The invention belongs to the field of biological medicines, and particularly relates to application of penicillamine in preparation of a medicine for preventing and treating noise-induced deafness. According to the specific technical scheme, the application of the penicillamine in preparing the medicine for preventing and treating hearing impairment / deafness is provided. The hearing disorder and / or deafness is caused by noise. It is found for the first time that penicillamine can play a hearing protection role by specifically regulating a cochlea immune microenvironment, and the hearing protection role is specifically achieved through the following mechanisms: inhibition of T cell activation: interference of a TCR signal channel; the hair cell structure is protected; the cochlea basilar membrane outer hair cell loss caused by noise exposure is reduced. Based on the new discovery of the invention, the penicillamine can be used for preventing and treating hearing impairment and deafness caused by noise.

The application belongs to the technical field of antitumor drugs, and relates to a Zn-penicillamine nano-chelating agent and a preparation method and application thereof. The nano-chelating agent is a non-water-soluble nanomaterial formed by chelating coordination of zinc ions and D-penicillamine. The preparation method is as follows: D-penicillamine and a divalent zinc salt are uniformly mixed in a solution, the pH is adjusted to neutral or alkaline, and continuous stirring reaction is carried out, and the Zn-penicillamine nano-chelating agent is obtained. The Zn-penicillamine nano-chelating agent provided by the application can interfere with cell ion homeostasis, realize dual inhibition of oxidative phosphorylation (OXPHOS) and glycolysis metabolism in breast cancer, and effectively activate an antitumor immune response.

The present application discloses a nanopharmaceutical that can slowly release NO and load anticancer drugs, as well as its preparation method and application. The nanopharmaceutical of the present application slowly releases nitric oxide and loads anticancer drugs; the nanopharmaceutical is a nanoparticle formed by self-assembled polylactic-co-glycolic acid block copolymers embedding doxorubicin, nitrosoacetylpenicillamine and cationic liposomes. The nanopharmaceutical that slowly releases nitric oxide and loads anticancer drugs in the present application has the co-delivery of nitric oxide and doxorubicin, which not only realizes the combined treatment of nitric oxide therapy and chemotherapy, but also breaks the limitations of single treatment; moreover, the immunomodulatory effect of doxorubicin is increased by nitric oxide co-transmission, which can better regulate the tumor immunosuppressive microenvironment and improve the anti-tumor immune response. The nanopharmaceutical of the present application can reduce M2 macrophages, reverse the immunosuppressive tumor microenvironment, and thus achieve synergistic anti-tumor therapy.

The invention relates to the technical field of biomedical detection, in particular to a plasma detection device for detecting concentration of penicillamine, which comprises a bottom support, a test tube support, a detection processing mechanism and a needle cleaning mechanism are arranged at the top of the bottom support, an upper shell is arranged on the bottom support, and an automatic detection mechanism is arranged on the inner wall of the upper shell. A detection post-processing assembly is arranged on the automatic detection mechanism; the automatic detection mechanism is used for automatic detection, the needle head cleaning mechanism is used for cleaning the needle head after detection, manual participation is not needed in the whole process, the detection efficiency is improved, and the labor cost of detection is reduced; in the downward insertion process of the sampling needle head and the processing needle head, the air blowing purification mechanism is used for cleaning the space above the sealing diaphragm, so that dust, fibers and microbial aerosol are prevented from being brought into the packaging shell, and the concentration detection precision after the sampling needle head and the processing needle head are ensured.

The present application relates to a kind of magnesium oxide doped chiral cobalt-based nanomaterial and its preparation method and application, belong to nanomaterial technical field.The preparation method of the present application includes the following steps: S1, the cobalt source solution, magnesium source solution and surfactant solution are dissolved in organic solvent, to obtain precursor solution;S2, adding penicillamine solution to precursor solution, chiral environment is induced by coordination interaction, to obtain chiral intermediate solution;S3, adding reducing agent to chiral intermediate solution and carrying out self-assembly reaction, by centrifugation, washing, vacuum drying, to obtain magnesium oxide doped chiral cobalt-based nanomaterial;The catalytic activity of the obtained material is high, stability is good, and has wide application prospect in asymmetric photocatalytic reaction.

The invention belongs to the technical field of medicine preparation, and particularly relates to a preparation method of retaglutide. According to the method, a fragment 1-4-methoxy salicylaldehyde ester and a fragment 2 are connected through a cysteine / penicillamine connection reaction, acidolysis and desulfurization are performed, crude retaglutide is obtained, and the purity of the crude peptide can reach 83.3%; furthermore, secondary high-pressure preparation and purification are adopted to obtain a final qualified retaglutide finished product, the secondary purification purity can reach 99.47%, and the overall yield reaches 37.2%; according to the method, a two-stage method is adopted, a CPL chemical connection method is used for chemical connection, the method has the advantages of being low in cost, capable of achieving large-scale production, high in yield, high in crude peptide purity and the like, the purification cost and the production cost are greatly reduced, all fragments 2 are natural amino acid, and biological fermentation production can be achieved. Therefore, the method has the advantages of semi-chemical and semi-biological synthesis, and the production cost is greatly reduced.