38results about How to "Good paramagnetism" patented technology

This invention is related to magnetic nanoparticles of hydroxyapatite for biomedical applications and the preparation method thereof. The magnetic particles of hydroxyapatite are prepared by a wet chemical co-precipitation method at lower temperature, wherein the calcium ions originally existing in hydroxyapatite are replaced with divalent or trivalent metal ions, for example, Fe+2 ion, to form magnetic nanoparticles of hydroxyapatite.

The invention discloses a method for preparing a polyvinyl alcohol magnetic film, which comprises: dissolving egg albumen powder serving as a dispersant in deionized water, adding nanoscale Fe3O4 powder, and performing ultrasonic dispersion treatment to obtain a nano Fe3O4 aqueous solution system, wherein the mass ratio of the egg albumen powder to the Fe3O4 is 2:1; adding the system into aqueous solution of polyvinyl alcohol to prepare a spinning solution, wherein the polyvinyl alcohol concentration of the spinning solution is 6 to 9 weight percent, and the Fe3O4 concentration is (0.2 to 4)*10<-3>g/mL; and obtaining a nano fiber-like polyvinyl alcohol magnetic film by using an electrostatic spinning process. In the invention, a nontoxic and nonirritating surface dispersant is used, the dispersion effect is desirable, the preparation process of the magnetic film is simple and the obtained magnetic film has stable performance and high magnetic performance.

The invention discloses a composite Fe3O4 magnetic nano particle for combining lung cancer cells and a preparation method thereof. Polyimide is modified on the surface of the Fe3O4 magnetic nano particle, and composite protein which has capacity of combining the lung cancer cells is marked on the Fe3O4 magnetic nano particle, wherein the composite protein which has capacity of combining the lung cancer cells consists of staphylococcus A (SPA) protein and one or two of anti-CD44 antibody and anti-CK7 antibody. The invention also discloses a method for enriching and detecting the lung cancer cells in sputum. The method comprises the following steps of: a) collecting sputum, and fully liquefying the sputum; b) adding a composite nano magnetic particle solution and reacting; c) centrifuging reaction liquid to enrich cells in the reaction liquid; and suspending the obtained cells again, tabletting the suspension, dying, sealing and performing microscopic examination by using a thinprep cytology test (TCT) system. Compared with the conventional method, the method has the advantages that the positive rate of the lung cancer cells which is detected in the sputum is improved by more than 30 percent, the detection efficiency is improved obviously and detection cost is reduced to certain extent.

The invention discloses a near-infrared fluorescent magnetic Fe NCs dual-mode probe as well as a synthesis method and an application thereof. The valence state of an iron element in the magnetic Fe NCs dual-mode probe is zero, the particle size of the iron element is 5 nm, an iron nano-cluster prepared from glutathione serving as a stabilizer and iron ions in a molar ratio of 1: 0.3073 has excellent near-infrared fluorescence emission capacity, interference of biological autofluorescence in a sample can be effectively avoided, and the product can be used for high-sensitivity detection of the drug molecule tiopronin in a complex detection system. Besides, the probe also has relatively strong paramagnetic properties, can generate bright T1 weighted image signals under the action of an external magnetic field, is gradually enhanced along with the increase of the concentration of the probe, and also has a wide application prospect in the aspect of magnetic resonance imaging.

The invention provides a method for immobilizing deinococcus radiodurans with functional magnetic carriers and an application of the method in treatment of uranium-bearing wastewater. An organic reagent is adopted for surface acyl chloride functionalization of magnetic Fe3O4 nanoparticles to obtain DR (deinococcus radiodurans) immobilizing carriers, the DR immobilizing carriers are magnetically immobilized with diethylenetriamine chemically-modified DR to obtain a functional magnetic adsorbent resistant to deinococcus radiodurans, and the functional magnetic adsorbent resistant to deinococcus radiodurans is applied to adsorption of the uranium-bearing wastewater. The novel functional magnetic adsorbent resistant to deinococcus radiodurans has the advantages of high radiation resistance, low cost, high chemical stability, high mechanical strength, effectiveness in uranium adsorption and the like. In addition, the method is simple and easy to realize magnetic control, and uranium content of low-concentration uranium-bearing wastewater with the concentration being 0.45-0.55mg/L can be reduced by more than 95%.

The invention discloses a magnetic targeting cell membrane modified ligand, a drug-loading material, a preparation method of the magnetic targeting cell membrane modified ligand and the drug-loading material and an application of the drug-loading material. The structural general formula of the magnetic targeting cell membrane modified ligand is shown as I series or II series in the formula (1). The magnetic targeting cell membrane drug-loading material is obtained by performing chemical covalent bond modification on a cell membrane to modify the magnetic targeting cell membrane modified ligand, an in-vitro test shows that the material is good in stability, can be effectively taken in by tumor cells, and has relatively high selectivity on the tumor cells, and besides, the material has remarkable paramagnetism. Under the condition of an external magnetic field, a magnetic targeting effect can be achieved. In an in-vitro anti-tumor test, the drug-loading material is remarkable in anti-tumor activity and hardly has toxicity to normal cells, so that the drug-loading material has a potential application of targeted therapy of malignant tumors.

The invention discloses a hybridized aerogel material with self-cleaning, heat-insulation and wave-absorbing multi-function. The hybridized aerogel material is prepared from the following raw materials: in percentage by weight, tetraethoxy titanium, absolute ethyl alcohol, acetone, nitric acid, ammonium hydroxide, tetraethoxysilane, trimethylethoxysilane, a potassium hydroxide solution, a sodium nitrate solution, a ferrous sulfate solution, N-ethyl morpholine and pure water. The micron-sized roughness of the aerogel honeycomb structure and the nanoscale roughness caused by Fe3O4 particles caneffectively reduce the water-solid contact area, and the material presents the good hydrophobicity, and can achieve self-cleaning effect. Because the aerogel is filled with a great amount of air whilethe solid phase proportion is relatively less, the pyroconductivity is low, heat transmission is remarkably reduced due to random distribution of air vents, therefore the aerogel material has the good heat insulation property, and can achieve the excellent infrared stealth function. The hydrophobicity of the aerogel avoids the situation of decreasing heat insulation property caused by invasion ofmoisture in the environment, so that the material can be applied to the harsh environment, and has the outstanding comprehensive properties of high adsorption and low weight.

The invention relates to a preparation method of 8-methoxy-2-tetralone. According to the method, 8-methoxy-2-tetralone is synthesized through a hydrolysis reaction, a reduction reaction and the like with 2-methoxybenzonitrile serving as the starting material. The method has the advantages that the raw material 2-methoxybenzonitrile is cheap and easy to obtain; reaction conditions of the technology are mild, reaction time of the technology is short, the yield is high, operation is easy and convenient, and industrial production can be easily achieved; use of expensive catalysts like rhodium is avoided in the technology, and production cost is low; adopted novel magnetic-nanoparticle-loaded lewis acid has good paramagnetism and can be rapidly separated from a reaction system and recovered just by adopting a simple applied magnetic field in separation and recovery, the process is simple, the quantity of the three wastes is small, and production cost is low.

The invention discloses a synthesis method of a MnO nanometer material of a T1 contrast agent, and relates to a magnetic nanometer material. The method comprises the following steps: mixing trioctylamine with an oleic acid solution evenly; adding manganese acetate powder; dispersing, carrying out heating reaction, and cooling to room temperature; and participating and centrifuging reaction products, and washing, so as to obtain the MnO nanometer material of the T1 contrast agent. The method for preparing the MnO nanometer material of the T1 contrast agent is simple to operate; a reactant is cheap, and low in cost; the reaction is rapidly finished; the required time is short; the synthesis method hardly causes side reactions and high in product yield; energy utilization rate is high; the reaction process is free from generation of harmful substances and is energy-saving and environment-friendly; and the MnO nanometer material has good paramagnetism and T1 contrast effect; r1 value is 2.369mM<-1>s<-1>; and the prepared MnO magnetic nanometer particles are uniform in particle size, have good dispersity and stability, and can be stored for a long period of time after being dispersed in cyclohexane.

A drill string component, in particular a drilling collar component, an MWD component, or an LWD component for use in oilfield technology and particularly in deep drilling, is provided. A method of making a drill string component, and a steel alloy useful in making a drill string component, are also provided.

The invention discloses a terbium-containing borate compound. The chemical formula of the terbium-containing borate compound is Rb2LiTbB2O6. The invention also discloses a polycrystalline compound ofthe terbium-containing borate compound, an optical crystal, and a preparation method and application of the optical crystal. The polycrystalline compound can be used as a fluorescent powder matrix, and the optical crystal can be used as a magneto-optical crystal. The terbium-containing borate compound is simple in synthesis and low in cost, grows easily, and has important economic value and scientific research value in the field of solid-state illumination and magneto-optical materials.

The invention provides an ethylene glycol-based magnetic fluid composite film and a preparation method thereof, which relate to the technical field of magnetic composite materials and are mainly prepared from the following components in parts by mass: ethylene glycol-based magnetic fluid 90-110 15-25 parts of polyvinyl alcohol, 70-90 parts of deionized water, among which, the ethylene glycol-based magnetic fluid is mainly prepared from nano ferric oxide, ethylene glycol and a dispersion stabilizer, which relieves the existing magnetic fluid Among them, the carrier liquid matrix is ​​water-based or oil-based, so that the degree of dispersion of magnetic nanoparticles has not been significantly improved, resulting in the technical problem that the performance of the magnetic fluid composite film is limited. The ionic water cooperates with each other to make the magnetic particles evenly distributed in the composite film, so that the composite film can maintain good paramagnetic properties, the saturation magnetization is larger, the magnetic susceptibility per unit mass is higher, and the strain capacity is better. The technical effect of better magnetic properties.

The invention belongs to the field of nano materials, and particularly relates to a preparation method of an anti-tumor nano robot. The anti-tumor nano robot comprises the following steps that (a) an iron target is placed in a sputtering chamber, argon and oxygen are introduced into the sputtering chamber, and a power supply of the sputtering chamber is started to carry out magnetron sputtering; during the period, the temperature of the sputtering chamber is 800-1200 DEG C; (b) after the magnetron sputtering is finished, the temperature of the sputtering chamber is maintained at 800-1200 DEG C, and acetylene is introduced into the sputtering chamber; and (c) after acetylene introduction is finished, protective gas is introduced into the sputtering chamber, and the temperature of the sputtering chamber is rapidly reduced to 100-300 DEG C to obtain the anti-tumor nano robot. Experimental results show that the saturation magnetization intensity of the anti-tumor nano robot prepared by the method is 19-20 emu/g, the residual magnetization intensity is 4-5 emu/g, the coercive force is 550-600 G, the particle size is 70-100 nm, the particle size uniformity is less than 6.5%, the purity is greater than 99.9%, and the graphitization degree is greater than 90%.

The invention discloses a production method and application of attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles. The production method comprises the following steps: (1) purifying attapulgite; (2) producing oil-soluble ferroferric oxide nanometer particles; (3) obtaining the oil-soluble ferroferric oxide nanometer particles; (4) producing ferroferric oxide nanometer particles modified by dimercaptosuccinic acid; and (5) producing the attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles. According to the providedproduction method and application of the attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles, safe agents are used in the whole production process, the production process is safe and non-toxic, the operability is high, and the produced medicine carrier attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles have small toxic and side effects, and can reach a focus smoothly under the action of an external magnetic field while carrying a medicine.