1332 results about "Ultrasound assisted" patented technology

An apparatus and method for transdermally delivering a vaccine comprising a delivery system having (i) a microprojection member (or system) that includes a plurality of microprojections (or array thereof) that are adapted to pierce through the stratum corneum into the underlying epidermis layer, or epidermis and dermis layers and (ii) an ultrasonic device. In one embodiment, the vaccine is contained in a biocompatible coating that is applied to the microprojection member. In a further embodiment, the delivery system includes a gel pack having a vaccine-containing hydrogel formulation that is disposed on the microprojection member after application to the skin of a patient. In an alternative embodiment, the vaccine is contained in both the coating and the hydrogel formulation.

A method and apparatus for ultrasonic assisted deposition of a release agent onto a workpiece is disclosed. The release agent can be any fluorinated or non-fluorinated phosphorous-containing organic acid. The workpiece can be any workpiece desired to be coated with the release agent, such as a surface needing an anti-stick coating required in a plastic casting or injection mold. Metal oxide workpiece surfaces strongly bond to fluorinated phosphorus-containing organic acids. In particular, the present invention can deposit anti-stick coatings onto smooth or porous surfaces, such as anodized aluminum and its alloys, using ultrasonic assisted deposition

The invention discloses a method for producing instant straw mushroom chips by adopting a vacuum low-temperature dehydration technology, and belongs to the technical field of deep processing of agricultural products. The method for producing the instant straw mushroom chips comprises the following main processes of: performing pretreatments such as conventional picking, cleaning, segmenting, blanching, non-sulfur color protecting, ultrasonic aid impregnating, sodium alginate film coating and the like on fresh straw mushrooms, and then, performing hot air and vacuum frying combined dehydrating, centrifugal oil removing, seasoning and packing. By adopting the new processes of non-sulfur color protecting, ultrasonic aid impregnating, sodium alginate film coating and hot air and vacuum fryingcombined dehydrating, the oil content of the product is remarkably reduced while the sensory quality of the product is improved and the impregnating efficiency is increased. In the method, necessary freezing treatment in the conventional fruit and vegetable chip frying process is not needed, so that the processing time is greatly reduced, and the production period of the product is effectively shortened. The product obtained by using the method has the characteristics of high puffing rate, low oil content, good sensory quality and the like; and a feasible new path is provided for deep processing utilization of the straw mushrooms.

The invention provides a method of effectively extracting ganoderma triterpenoids and ganoderan from mythic fungus germ entity by ultrasonic-alcohol extracting, complex enzyme-water extracting integration technology. The method is characterized by comprising the steps of: crashing the mythic fungus germ entity, using the ultrasound assisted alcohol extract (ultrasonic-alcohol extracting) to extract the ganoderma triterpenoids, then using complex enzyme assisted water extracting (complex enzyme-water extracting) to prepare ganoderan, then sponging drying to obtain ganoderma triterpenoids and ganoderan extractive. The solvents used by the method used in the invention is safe, innoxious and avoids the pollution to the environment by using chloroform, methanol and other organic solvents in the traditional method. And the invention has the features of low extraction temperature, simple device, convenient operation, low cost, fast speed, high effects and so on. Using the process to comprehensively extract triterpenoids and ganoderan active substances in glossy ganoderma can significantly increase the total active substance yield than the single extracting method.

The invention discloses a device and a method for polishing a sapphire substrate material by ultrasound assisted chemical machinery, which belong to the technical field of polishing of sapphire substrate materials. An ultrasound power supply is connected to a positive terminal and a negative terminal of an ultrasonic transducer through a conducting wire, a carbon brush and a copper slip ring; the ultrasonic transducer converts an electrical signal into a mechanical vibration signal; and ultrasonic vibration is transmitted to a polishing head and a sapphire substrate arranged on the polishing head through an amplitude transformer. Compared with the traditional chemical mechanical polishing process, the method has the advantages that: due to the adoption of a composite action structure of ultrasonic vibration and chemical machinery, the method reduces the polishing cost and the polishing time of the sapphire substrate, improves surface topography precision of the sapphire substrate, meets the performance requirement of serving as the substrate material, and improves the polishing efficiency and the polishing quality; the polishing efficiency is improved by over one time; and the surface roughness of the polished sapphire is less than angstrom level. The ultrasonic assisted chemical mechanical polishing process is characterized by simple operation, convenience and practicability.

The invention discloses a purely natural essential oil composition for keeping fresh and a preparation method and a using method thereof. Essential oil which is extracted from the natural substances of clove, cinnamon, caraway, garlic, seed of cuminum cyminum L. and fennel seed is prepared into an active packaging material with the functions of bacteriostasis and anti-oxidation according to a certain proportion, wherein the active packaging material has the characteristics of wide application range, naturalness, efficiency, no toxicity, simplicity and practicability, and can be widely used for packaging of foods such as fruits, vegetables, meats and the like; and the extraction method is an ultrasound-assisted extraction method. The essential oil composition can be used in various forms, namely the essential oil composition can be coated on the foods, can be used for soaking the foods, can be in the form of preservative bags, and the like. When packaging the foods, the essential oil composition can inhibit growth of microorganisms and resist oxidation at the same time, so that the shelf life of the fruits, the vegetables and the meats can be prolonged by 2 to 8 times, and the essential oil composition meet consumer psychology and has greater actual application value.

The invention relates to a method for preparing wheat bran dietary fiber by utilizing ultrasound-assisted enzymatic hydrolysis, and in particularly belongs to the technical field of the agricultural and sideline product development, the functional food additive and the nutritional heath caring. The invention is characterized in that the invention adopts wheat bran as the raw material, and the wheat bran dietary fiber preparation is realized through utilizing the ultrasound treatment, and removing starch and protein by enzymatic method, and then the preparation of fine dietary fiber with different grain size is realized by crumbling with a grinder. The invention realizes the effective value increment and the utilization of the wheat bran, the prepared functional dietary fiber has important physiological function, and thereby can realize the functions of preventing constipation, colon cancer, intestina diverticulum, hemorrhoid and varicose veins of the lower extremities; the serum cholesterol is lowered, and the heart disease caused by coronary sclerosis can be prevented; the sensitivity of the peripheral nerve tissue to the insulin is improved, and the blood sugar level of the diabetes patient can be regulated, the invention is very useful for human health, and the economic benefit as well as the social benefit are greatly increased.

The invention relates to a preparation method for oxidized graphene in a large sheet. The method comprises the following steps: uniformly mixing natural scale graphite with the mixed acid of concentrated nitric acid or nitric acid and sulfuric acid in a reactor; adding hydrogen peroxide from the bottom of the reactor; reacting under mixing for 10-60 min; washing with water and drying to obtain layered graphite; mixing the layered graphite with strong acid; adding strong oxidant slowly; performing ultrasound-assisted oxidation reaction in an ice-water bath for 30-60 min after uniform mixing; heating the reaction mixture to 50-60 DEG C and continuing mixing for 6-12 h; adding deionized water and performing ultrasound-assisted mixing reaction for 10-30 min; cleaning the obtained product first with mixed solution of diluted hydrochloric acid and hydrogen perhydrol, then with deionized water; performing centrifugal separation to obtain oxidized graphene. The method provided by the invention is simple in operation, high in oxidation efficiency and free from environment pollution; the prepared oxidized graphene has a high peeling rate and a high specific surface area.

The desulfurization of fossil fuels is effected by the combination of fossil fuels with an aqueous mixture of hydroperoxide and quaternary ammonium fluoride phase transfer catalyst, the mixture then subjected to ultrasound to oxidize sulfur compounds present in the fuels. The polar oxidized species are removed via extraction. Another aspect is a portable, continuous ultrasound assisted desulfurization device having a sonoreactor for subjecting mixtures of fossil fuels to sonication to effect removal of sulfur containing compounds.

A method for stimulating perfusion and minimizing postischemic reperfusion injury. A patient is selected having compromised perfusion in a tissue or in the microcirculation of an organ. An ultrasound transducer is applied to a location near the tissue. The transducer is activated to initiate exposure of the tissue to ultrasound at a frequency of 100 KHz to 2.5 MHz for 0.5 to 15 minutes duration, wherein local vasodilatation is stimulated. In certain cases, the methods further include a step of confirming that local vasodilatation is stimulated by measuring enhancement in perfusion. Ultrasound devices are also described for carrying out the methods. The devices and methods can be used to enhance myocardial perfusion, cerebral perfusion, and perfusion of transplanted tissues.

The invention discloses a preparing method of porous monocrystal IT MoS2 nanosheet. The method comprises the steps of 1, preparing 2H crystal form MoS2 nanosheet using hydrothermal method; 2, conducting stripping of multi-layered 2H crystal form MoS2 nanosheet with ultrasonic wave and assisting with a lithium-ion intercalation method. The 1T MoS2 nanosheet can be directly used for electro-catalysis hydrogen production, and compared with MoS2 with other structures, electro-catalysis hydrogen production property can get fast improvement, porous structure provides more edges for the catalysis, therefore can expose more active sites, which is beneficial to electro-catalysis hydrogen production; single-layered structure enables larger specific surface area of the catalyst, can provide more reaction active sites. Compared with a multi-layered structure, a single-layered structure reduces electric transmission resistance between layer and layer, is beneficial to transmission and transfer of electricity, thus accelerating velocity of electro-catalysis hydrogen production.

The invention discloses a preparation method of modified activated carbon for removing formaldehyde in air in high efficiency. The preparation method comprises the steps of utilizing general activated carbon as base carbon, weighing nitrogen substance and deionized water, dissolving the nitrogen substance into the deionized water, then adding the base carbon, evenly mixing, standing for several hours, then performing ultrasound-assisted treatment, flatly paving the obtained base carbon, air drying the base carbon, then stoving the base carbon and naturally cooling to room temperature to obtain the modified activated carbon. The modified activated carbon for removing formaldehyde disclosed by the invention has safe raw material, low price and low cost; the method is convenient and easy to operate and can be easily expanded in industry; a method in which physical adsorption fixation and chemical reaction elimination are combined is utilized, so that a formaldehyde removing effect is obvious; furthermore, the modified activated carbon has safety, stability, no secondary pollution and convenience in use; ability for adsorbing formaldehyde in the air is larger than 90% and reaches a level of superior formaldehyde removing dedicated carbon.

A system and method for regional anesthesia using ultrasound to assist in locating the anesthetic needle are disclosed. One or more piezo-electric crystal transducers is placed either at the tip of the needle or near the tip of the needle on a stylet which is inserted into the lumen of the needle. The transducer(s) are pulsed with ultrasonic frequency, the reflected ultrasonic signals from structures are detected and converted into a digital signal and may be displayed in an oscilloscopic format to indicate anatomical structures forward to the needle and allow the medical professional to avoid errors and/or increase efficiency and accuracy. An array of transducers can be pulsed in a phased array fashion to generate a 2D image, or a single transducer can be pulsed to generate a 1D image. A 2D image can also be obtained by mechanically sweeping a single transducer, for example by means of a miniature motor in or at the base of a needle or stylet.

The invention discloses a production method of lycopene microcapsule, providing a production method for realizing lycopene encapsulated emulsion by spray drying on the basis of the physical and chemical properties of lycopene. The method comprises the following steps: blending wall material solution, blending core material solution, homogenizing after the core material solution is mixed with the wall material solution, carrying out spray drying on emulsion, measuring lycopene microcapsule solubility, carrying out stability test and the like. Preferably, the preparation step of the lycopene microcapsule also comprises: an ultrasound assisted high-pressure homogenizing method is adopted to prepare the emulsion; and homogenized emulsion is performed with spray drying to obtain the lycopene microcapsule which has high solubility and favorable stability for light, heat and oxygen.

The invention belongs to the field of analytical chemistry and particularly relates to an analysis method for simultaneous detection of amino acids and biogenic amines in foods. The method is characterized in that for the first time, 4'-carbonyl chloride-rhodamine is used as a derivatization reagent to realize simultaneous derivatization of the amino acids and the biogenic amines in the food by means of ultrasonic assistance, in-situ derivation and dispersive liquid-liquid microextraction, and qualitative and quantitative detection and analysis are performed by means of ultra-high performance liquid chromatography coupled with triple quadrupole tandem mass spectrometry in multi-reaction monitoring mode. The method can be used for simultaneous analysis and detection of eight amino acids and nine biogenic amines; by adoption of 1,7-diamino heptane as an internal standard substance, contents of the amino acids and the biogenic amines in different foods can be obtained accurately according to an internal standard method for quantification. The method has advantages of simplicity, quickness, high sensitivity, high selectivity and the like, and high recovery rate is achieved. In addition, by the analysis method, accurate and reliable technical means can be provided for food quality assessment and supervision.

The invention provides a preparation method for a nanometer red phosphorus and graphene composite negative electrode material. The preparation method comprises the following steps of preparing submicron red phosphorus, in which commercial red phosphorus is used as a raw material, and the submicron red phosphorus is prepared by wet grinding, dispersion and solvothermal reaction; preparing graphene oxide, in which the graphene oxide is prepared by employing an ultrasound-assisted improved Hummers method; and preparing the composite negative electrode material, in which the submicron red phosphorus is added into a graphene oxide solution, and a finished product of the nanometer red phosphorus and graphene composite negative electrode material is obtained by secondary hydrothermal reaction, filtering and drying under stirring. Submicron red phosphorus particles are prepared by the solvothermal method and are further reduced to nanoscale by secondary hydrothermal reaction, meanwhile, the graphene oxide is reduced and wraps surface of the red phosphorus, the preparation method has the advantages of moderate reaction condition, simple equipment, safety, reliability and the like, and is simple and convenient to operate, and the nanometer red phosphorus and graphene composite negative electrode material has relatively good charge-discharge cycle property and rate performance when used as a lithium/sodium ion battery negative electrode material.

Ultrasound-assisted contactless stirring of liquids in a resonator cell by microparticles is achieved by repeated creating and destruction of nodal patterns associated with standing waves of various resonance frequencies causing continuous movements of microparticles inside the cell. Swept-frequency sonication methods include using constant or variable rate of frequency change as well as a stepwise change of frequency of the transducer within a predefined range. Other useful steps include initial detection of the set of resonance frequencies and periodic refreshing of that set. Control systems are described including means to automatically detect the resonance frequencies and maintain the operation of the transducer thereon. Advantageous designs of the apparatus are described for use in microstirring, mixing of liquids using magnetic microbeads, microbubbles, microtiter plates, microarray plates, etc.

The invention belongs to the technical field of materials, in particular relates to a preparation method of graphene and particularly relates to a method of preparing graphene by virtue of assistance of ultrasonic waves. The preparation method is mainly used for preparing graphite with high quality, large yield and low cost and is characterized by comprising the following steps: treating a graphite raw material by virtue of an acid solution firstly, then adding the graphite raw material after acid treatment into an active matter solution, carrying out ultrasonic treatment on a mixture to obtain a graphene dispersion liquid, and then carrying out drying treatment on the graphene dispersion liquid to obtain a graphene powder. By adopting the preparation method, the graphene prepared by virtue of the method has an integral structure, little defects and larger size and is stable in the performance; in addition, the experimental process is simple and effective and can be used for large-scale industrial production; the self properties such as thermal property, the electric property and mechanical property of the graphene are better preserved; as the reaction condition is mild, high-temperature and high-pressure reaction is not related, the procedure is simple, and the production cost is low; the method has better potential in large-scale industrial application.

The invention provides an auxiliary ultrasound milling technological method for laser micro-texture prefabricating. The technological method comprises a laser pretreatment step and an ultrasound auxiliary milling step. The laser pretreatment step comprises the sub-steps that a position parameter of a to-be-machined material is adjusted, so that the position parameter of the to-be-machined material is in accordance with a first predetermined position parameter; and a laser beam is generated, and the spatial posture, corresponding to the to-be-machined material, of the laser beam is adjusted. The ultrasound auxiliary milling step comprises the sub-steps that the position parameter of the to-be-machined materials subjected to laser pretreatment is adjusted, so that the position parameter of the to-be-machined material is in accordance with a second predetermined position parameter; ultrasound vibration of an ultrasound cutter assembly is controlled; the ultrasound cutter assembly is rotated, and the rotation freedom degree, corresponding to the to-be-machined material subjected to laser pretreatment, of the ultrasound cutter assembly is adjusted; and the position relation between the ultrasound cutter assembly and the to-be-machined material subjected to laser pretreatment in the X direction, the Y direction and the Z direction is changed. The invention further relates to an auxiliary ultrasound milling machining system for laser micro-texture prefabricating.

The invention relates to the technology for preparing ferulic acid and phytic acid from rice bran as raw materials through alkali liquid extraction separation. The ferulic acid extraction process is characterized in that high-purity ferulic acid is obtained through purification and separation by a high-speed reverse flow chromatography method. The phytic acid extraction process is characterized in that the ultrasonic auxiliary extraction and macroporous absorbent resin technology is adopted for preparing the phytic acid. The high-speed reverse flow chromatography method is used for preparing the erulic acid, so the invention has the characteristics of large separation amount, no sample loss, high efficiency, high speed, mild separation environment, solvent saving and the like. In the ultrasonic extraction of the phytic acid, the production time is shortened. When the technology is used for producing the ferulic acid and the phytic acid, the product purity is high, the quality is high, and the industrialization can be easily realized.

A phased array of ultrasonic transducers may create arbitrary fields that can be utilized to manipulate fluids. This includes the translation of drops on smooth surfaces as well speeding the evaporation of fluids on wetted hands. Proposed herein is the use airborne ultrasound focused to the surface of the hand. The risk is that coupling directly into the bulk of the hand may cause damage to the cellular material through heating, mechanical stress, or cavitation. Using a phased array, the focus may be moved around, thus preventing acoustic energy from lingering too long on one particular position of the hand. While some signaling may penetrate into the hand, most of the energy (99.9%) is reflected. Also disclosed are methods to couple just to the wetted surface of the hand.

Devices, apparatus, and methods of using a modified scalpel tool that is removable from a polyurethane mated sheath for use in carpal tunnel surgeries and the like. The modified scalpel tool has an elongated stem with a flat blade at the distal end and an elongated handle at the proximal end. The sheath has a cavity for allowing the elongated blade to be inserted therein, two slots to receive two metal studs and a handle at its proximal end. The flat blade tool-polyurethane when combined (mated) produces a stable configuration that allows motion in only one rotational plane and with an arc of 90-95 degrees.

The invention relates to a method for extraction of tea seed oil by an ultrasound-assisted enzymatic process. The method includes: subjecting tea seeds to hulling, drying and crushing, then mixing the crushed tea seeds with water, conducting a heat treatment to perform enzyme deactivation, then carrying out an ultrasonic treatment, adjusting the pH, then adding alkaline protease and composite cellulose to undergo enzymolysis, conducting centrifugation and taking the upper oil, and performing vacuum drying. Compared with the existing tea oil extraction technologies, the method provided in the invention has the advantages of high oil yield, simple operation, no harm to human body, as well as cheap and easily available equipment, thus being suitable for large scale promotion and application.

The invention discloses an ultrasound-assisted enzymolysis wheat bran method for preparing ferulic acid, comprising the following steps: a. crushing wheat bran; b. heating wheat bran obtained in step (a) in water bath; c. removing starch in wheat bran by enzymolyzing alpha-amylase; d. removing protein in wheat bran by using alkaline protease; e. centrifugally precipitating suspending liquid, abandoning supernatant, and washing the suspending liquid with distilled water to obtain bran residue; f. drying bran residue; g. carrying out ultrasound treatment on dried wheat bran; h. carrying out enzymatic reaction on bran obtained in step g by xylanase; and i. centrifuging suspending liquid obtained in step (h) by enzymatic reaction, taking supernatant, after washing residue at the lower level, combining supernatant to carry out concentration and vacuum drying to obtain crude ferulic acid; dissolving the crude product in anhydrous ethanol, centrifuging to remove precipitation and obtaining transparent faint yellow supernatant, and then concentrating and drying to obtain ferulic acid crystallization with higher purity.

The invention discloses a method for extracting a natural dye of gordon euryale seed shell, which is performed by the following steps: (1) pretreating raw materials; (2) performing ultrasound assisted extraction on the crushed gordon euryale seed shell; (3) performing secondary extraction on filter residue; and (4) refining natural dye of coarse gordon euryale seed shell, dissolving the natural dye of coarse gordon euryale seed shell by using deionized water, and passing through a cation macroporous absorption resin column to obtain refined brown powdery natural dye extract of the gordon euryale seed shell, wherein the dyed fabric is light brown. The application of the natural dye of gordon euryale seed shell in the pure cotton dyeing comprises the following two processes: pretreating cotton fabrics and dyeing the pure cotton, namely, (1) treating the pure cotton fabrics in a prepared pretreatment agent; and (2) dyeing by adopting the natural dye of gordon euryale seed shell, and taking out the fabrics for cleaning and drying. The method for extracting the natural dye of gordon euryale seed shell can effectively extract the natural dye by using wastes, is favorable for environmental protection, and saves energy. The clothes made by the dyed fabrics are safe and biodegradable.