121 results about "Magnetic molecules" patented technology

The invention relates to an underwater navigating electromagnetism heating cavitation device. It installs a cavitating device formed by magnetic molecule material on the head of the navigating device, and installs a high frequency alternating electromagnetic field generator in navigating device. When the generator works, the magnetic molecule material would generate eddy current to make molecule moving disorderly in high speed. The molecule would collide and fractionize to generate heat, and the temperature would rise rapidly to achieve vaporizing temperature. The bubble would be formed around the navigating device to decrease the surface friction resistance and improve moving speed.

The invention discloses a preparation method and application of hydrophilic magnetic molecule imprinted material for sulfonamides veterinary drugs, belongs to the field of organic matter inspection, and particularly relates to a preparation method and application of the sulfonamides drug molecule imprinted material. The method includes the steps of 1), preparing Fe3O4 particles with a coprecipitation method; 2), preparing Fe3O4 for silylation by adopting a stober method to obtain SiO2 coated magnetic microspheres; 3), synthesizing sulfonamides molecule printed polymer particles. The magnetic molecule imprinted materials is fast in adsorption capacity in water phase, high in adsorption function, strong in specificity, high in recovery rate and low in preparation cost; meanwhile, the shortcoming that large amount of solvent required in pretreatment technology of traditional samples is overcome.

A biosensor not requiring washing of an unbonded label molecular by analyzing an object to be measured such as an antigen, an antibody, a DNA, and an RNA through magnetic field sensing. The biosensor is small in size, low in price, and high in sensing accuracy. Semiconductor Hall devices are arrayed two-dimensionally on the bottoms of recesses in the surface of a sensor chip to which bonded is a magnetic molecule with which a magnetic particle is labeled so as to sense the magnetic field produced along the sensor surface of the sensor chip. The surface area of each semiconductor Hall device is less than the maximum cross section of the magnetic molecule, and the intervals of the arrayed semiconductor Hall devices are larger than the diameter of the magnetic Hall molecule. Thus, the analysis accuracy is enhanced. An interconnection is used commonly to the semiconductor Hall devices, thereby reducing the size of the sensor.

The invention provides a pseudo template magnetic molecule imprinted polymer for pesticide residue detection of a waterborne sample. The polymer Fe3O4@MIPs is prepared by comprising the steps that oleic acid-coated Fe3O4 nanoparticles, pseudo template molecules and functional monomers MAA are added into pore-forming agents, and after self-assembly is performed, cross-linking agents EGDMA and initiating agents AIBN are added in the mixture; after the cross-linking agents EGDMA and the initiating agents AIBN are completely dissolved, the mixture is dropwise added into polyvinyl pyrrolidone water solutions to complete a polymerization reaction; after Fe3O4@MIPs containing the pseudo template molecules is separated through an external magnetic field, the pseudo template molecules are removed, vacuum drying is performed, and the polymer is prepared. According to the polymer, the Fe3O4 nanoparticles are coated with oleic acid, and therefore the agglomeration phenomenon in the Fe3O4 preparation process is effectively avoided; a molecular imprinting polymerization reaction is performed by taking a compound of which the structure is similar to that of target pesticide as the pseudo template molecules, and therefore the phenomenon that a high result or a false positive result caused by the template leakage problem is effectively avoided; the target pesticide is easily and quickly separated from and brought away from the liquid sample through the magnetism of the polymer; the polymer is high in selectivity, little in interference, easy to operate, capable of being reused after being eluted, suitable for being used in the waterborne sample and good in effect.

The invention discloses a magnetic molecularly-imprinted polymer for identifying and enriching varieties of trace antibiotics and a preparation method and application thereof. The method comprises the following steps of mixing multiple types of template molecules and functional monomers, then, carrying out prepolymerization, then, adding surface modified Fe3O4 magnetic fluid, a cross-linking agent and an initiating agent so as to carry out polymerization reaction, collecting a polymer, which is obtained after the polymerization reaction is ended, with a magnetic substance, eluting the template molecules, then, washing with deionized water, and then, drying, thus obtaining the magnetic molecularly-imprinted polymer for identifying and enriching various of trace antibiotics. According to the magnetic molecularly-imprinted polymer for identifying and enriching varieties of trace antibiotics and the preparation method and application thereof, the varieties of trace antibiotics can be selectively identified and enriched and quickly, simply and conveniently separated at one time, so that the cost and time are greatly reduced, the efficiency is effectively increased, and the magnetic molecularly-imprinted polymer has a broad application prospect in the pretreatment of complicated samples in the fields of food, environment and the like.

The invention designs a method for synthesizing a magnetic resonance imaging contrast agent by applying synthesis of polylactic acid, a CdTe quantum dot and ferroferric oxide. The method comprises the following step: on the basis of selecting ferroferric oxide as a magnetic molecule and a near infrared CdTe quantum dot as an optical imaging molecule, compounding the ferroferric oxide and the near infrared CdTe quantum dot in a polylactic acid microsphere by virtue of a self-assembly mode to prepare the multifunctional magnetic resonance imaging contrast agent with magnetic resonance imaging, fluorescent imaging and biological targeting functions.

The invention discloses a neodymium-iron-boron permanent magnet material for robots, which is composed of the following elements according to mass percentage: praseodymium neodymium 25-35%, boron 0.86-1.12%, dysprosium 1.6-4.2%, copper 0.1-0.8%, cobalt 1.2~3.6%, aluminum 0.1~0.6%, zirconium 0.05~0.35%, niobium 0.1~0.9%, gallium 0.05~0.35%, cerium 0.2~0.5%, gadolinium 0.3~0.6%, terbium 0.2~0.8%, holmium 0.1~ 0.7%, and the balance is iron. This kind of NdFeB permanent magnet material optimizes the matching of elements, effectively improves the anisotropy field of magnet molecules, improves the coercive force of NdFeB permanent magnet materials, and reduces the influence on the magnetic energy product, making NdFeB The performance of boron permanent magnet materials has been greatly improved.

The invention relates to a magnetic molecular imprinting electrochemical sensor used for detecting trace sulfadimidine. A magnetic electrode modified by magnetic reduction graphene, dopamine auto-agglutination is adopted, and the sulfadimidine magnetic molecular imprinting electrochemical sensor is prepared. When the concentration of olaquindox is within the range of 10.0 nM-200.0 nM, the rise degree of electrochemical signals has a good linear relation with the concentration of sulfadimidine, and a method detection limit reaches 0.1 nM. The sensor is used for detecting actual samples, and the recovery rate reaches 92.6-101.7%. The sensor improves sensitivity and selectivity of sulfadimidine, and detection of trace sulfadimidine is easy to automate.