498 results about "Free oxygen radicals" patented technology

Methods for anisotropically etching a tungsten-containing material (such as doped or undoped tungsten metal) include cyclic treatment of tungsten surface with Cl2 plasma and with oxygen-containing radicals. Treatment with chlorine plasma is performed while the substrate is electrically biased resulting in predominant etching of horizontal surfaces on the substrate. Treatment with oxygen-containing radicals passivates the surface of the substrate to etching, and protects the vertical surfaces of the substrate, such as sidewalls of recessed features, from etching. Treatment with Cl2 plasma and with oxygen-containing radicals can be repeated in order to remove a desired amount of material. Anisotropic etching can be performed selectively in a presence of dielectric materials such as silicon oxide, silicon nitride, and silicon oxynitride.

The present invention can provide methods of forming a thin layer for a semiconductor device. The methods can include forming a recessed portion on an object, and forming an insulation layer on the object by reacting a water vapor, an oxygen gas including an oxygen radical and an organic silicon source gas with each other, so that the recessed portion is filled with the insulation layer. Accordingly, a flow characteristic of the insulation layer can be improved, so that a seam defect can be sufficiently decreased in the insulation layer. The present invention can further provide apparatus for forming a thin layer.

A devulcanization product of comminuted scrap rubber of rubber granules, in which the sulfur bridges of the rubber granule surface are broken and activated for a new vulcanization, is produced by treating the rubber granules to swell the rubber structure of the granule surface and by mixing the treated rubber granules with a devulcanization formulation, acting mechanically and chemically reductively on the rubber granules, in a heating and cooling mixer combination. The rubber granules and the devulcanization formulation are heated to a temperature of 105-150° C. and subsequently immediately cooled. A devulcanization compound is prepared by mixing the devulcanization product with vulcanization and binding agents so as to coat the rubber granules uniformly with them The devulcanization compound can also be prepared by coating the swelled rubber granules in layers by admixing vulcanization agents such as accelerators, activators, auxiliary agents, binding agents, oxygen radical donors and scavengers.

The present invention is process of treating refractory organic effluent with free radical and the electrically catalyzed reactor therewith. The present invention features that in an electrochemically hydrating proton reaction kettle and in the presence of initiator, free hydroxyl radical, superoxide anion free radical, free nitrogen radical, active free oxygen radical, etc are generated circularly and reacted in an electrically catalyzing high pressure reaction kettle with various kinds of refractory organic compounds for efficient decomposition. The present invention has high organic waste water degrading rate and low cost, and is suitable for high concentration organic waste water treatment in papermaking, petrochemical and other industry.

The present invention discloses a porphyrin derivative with large substituent and its pharmaceutical acceptable salt and its preparation method. The described porphyrin derivative is M-5,10,15,20-tetra[(N)-substituted-n-phenyl or heterocyclic radical] porphyrin, in which n represents 2,3 and 4 postion substitution, and M is one of Fe, Mn, Co, Ni, Cu Zn, Sn, Cr and V metal ions. Said invented porphyrin derivative has higher steric hindrance, and can effectively resist the combination of porphyrin with DNA, and can reduce the mutual transformation between the different isomers, reduce toxicity of porphyrin and raise its medicinal practicability. The described porphyrin derivative can be used as small molecular antioxidant for regulating concentration of peroxide between cells of human body or in cell.

A method of creating a modified heterophasic polyolefin composition is provided, whereby a polyolefin composition having at least two phases is melt mixed with a free radical generator, such as a peroxide, and a compatibilizing agent characterized by at least one nitroxide radical and at least one unsaturated bond capable of undergoing a radical addition reaction. Modified heterophasic polyolefin compositions with increased melt flow rates, impact strength, and clarity, which incorporate the compatibilizing agent, are also included within the scope of the invention.

The invention provides a fuel cell membrane with a high tolerance and its preparation method. The fuel cell membrane is formed by perfluoro ion resin, and an oxygen-containing free radical degradation agent is added into the membrane. The fuel cell membrane in the invention also contains polytetrafluoroethylene microporous membrane reinforcing material. The fuel cell membrane provided in the invention has a strong free radical tolerance, so that a high performance membrane is provided for long-life fuel cells. The invention also discloses the preparation method of the fuel cell membrane.

The invention relates to Chinese traditional medicine biology crimple dispelling and skin delicating cosmetic and manufacturing method. It extracts natural amino acid, plant female incretion in angelica, notoginseng, kudzu root and raspberry and so on ten kinds of Chinese herbal medicines with current supercritical and supersonic extraction technology, adds in super oxide dismutase, collagen, transparent acid, natural vitamin E, transmits the effective component such as plant essence into corium with fat skin penetrating absorption technology, it can eliminates dissociated oxygen free radical, at the same time, it can supplement the collagen, plant female incretion and other nutriment for skin, reaches the balance between discharge and supplementation.

An apparatus for cleaning the specimen and interior specimen chamber of Transmission Electron Microscopes, and similar electron- or charged-particle-beam instruments consisting of a plasma cleaning device mounted on a hollow rod that replaces the stage through the air lock of the instrument by being the same shape and size as the stage support rod. The plasma cleaning device is a small hollow cathode that is excited by RF power. Air or other oxygen containing mixtures is admitted to the plasma through the hollow rod at a pressure below 1 Torr. The plasma creates oxygen radicals from the oxygen containing gas. The oxygen radicals oxidize the hydrocarbons contamination and convert them to easily pumped gases. The apparatus can be attached to the electron microscope whenever cleaning is needed, and then is easily removed to return the instrument to its analytical function.

Adhesive compositions are disclosed which cure rapidly and completely on confinement between passive substrates, such as magnesium alloys, that are deficient in transition metals and transition metal ions. The compositions include one or more acrylate resins, one or more peroxy free radical initiators, one or more onium salts, and an accelerator such as acetylphenyl hydrazine desirably in an amount of about 1.0% or less by weight of the composition. These compositions provide exceptional bonding to such substrates without the need for a transition metal primer. Methods of making and using such compositions are also disclosed.

A thermal oxidation method capable of obtaining a high oxidation rate by generating a sufficient enhanced-rate oxidation phenomenon even in a low temperature region is provided. In addition, a thermal oxidation method capable of forming a silicon oxide film having a high reliability even when formed at a low temperature region. A basic concept herein is to form a silicon oxide film by thermal reaction by generating a large amount of oxygen radicals (O*) having a large reactivity without using plasma. More specifically, ozone (O3) and other active gas are reacted, so that ozone (O3) is decomposed highly efficiently even in a low temperature region, thereby generating a large amount of oxygen radicals (O*). For example, a compound gas containing a halogen element can be used as the active gas.

The invention provides an ultraviolet radiation damage resistant complex of marine oligosaccharides and collagen peptides, which is prepared from marine oligosaccharides with antioxidant activity and tilapia mossambica fishskin collagen peptides with molecular weight of between 2,800 and 3,000 Da through compatibility. Chemical and pharmacological experiments prove that: compared with single components subjected to compatibility, the complex can inhibit the generation of oxygen radicals caused by ultraviolet radiation obviously and can enter skin cell mitochondria in a targeting mode to a greater degree to inhibit light aging, and has the obvious protective effect on skin injury caused by the ultraviolet radiation. The complex provides theoretic support for the development of natural oligosaccharide-peptide complex uvioresistant and mitochondrion targeting medicaments and the high-value utilization of mariculture industry.

Cold storage solutions for the preservation of organs and biological tissues prior to implantation, including a cellular energy production stimulator under anaerobic conditions, an anti-inflammatory agent, and an oxygen free radical scavenger.

The invention discloses a jasmine flower extract, a preparation method and an application thereof. The jasmine flower extract contains the following components: 70 percent to 75 percent of jasmine total flavonoids, 15 percent to 20 percent of jasmine non-flavonoid glycosides and 10 percent to 15 percent of jasmine volatile components. A main extraction solvents adopted by the invention when extracting jasmine flower is a mixed solution of ethanol and water in different proportions, and glycoside and aglucon in the flower can also be extracted; polyamide resin column is used for enriching total flavonoids so that impurities are removed and purity is increased; additionally, the method removes a plurality of jasmine fragrant ingredients, and the main effective components of the extract obtained is total flavonoids, the purity is high and the content of jasmine fragrant ingredients is greatly decreased. Pharmacology examination proves that, the extract has the functions of relaxing isolated vascular tissue, removing isolated oxygen free radical, reducing animal blood pressure, relieving myocardial ischemia, improving arrhythmia symptoms and anoxia test and can be applied to treating cardiovascular diseases.

The invention discloses an isolated culture method of saussurea involucrata stem cells and an application of the saussurea involucrata stem cells in preparation of an anti-senile product. The method particularly comprises the following steps: taking tender leaves of saussurea involucrata, and sterilizing; firstly, separating the saussurea involucrata stem cells by virtue of a solid culture medium, and then carrying out subculture by virtue of a liquid culture medium, wherein the solid culture medium contains an inorganic salt, vitamin, amino acid, auxin, saccharides and activated carbon; and the liquid culture medium contains an inorganic salt, vitamin, amino acid, auxin, saccharides and an additive. The activity of SOD in the cells is improved by a human adipose-derived stem cell extract, thus the attack and the damage to the cells caused by oxygen radicals generated by ultraviolet radiant inducement are reduced; and the death rate of the cells is reduced, thus the effect of protecting the cells is achieved, and the anti-light aging efficacy is achieved.

The invention relates to a preparation method of a free nitroxide radical polymer brush polymerization inhibitor, and application of the free nitroxide radical polymer brush polymerization inhibitor in synthesis of epoxy soybean oil acrylic ester. The preparation method comprises the following steps: firstly, grafting a polyglycidyl methacrylate polymer brush on the surfaces of cross-linked polystyrene microspheres by using an electron transfer regenerated catalyst atom transfer free radical polymerization technique, and secondly, bonding tetramethyl piperidine free nitroxide radical onto the polyglycidyl methacrylate polymer brush, thereby obtaining the free nitroxide radical polymer brush. The application comprises: taking the free nitroxide radical polymer brush as a main polymerization inhibitor and a small molecule polymerization inhibitor as a polymerization inhibitor aid, thereby forming a composite polymerization inhibition system for preparing epoxy soybean oil acrylic ester. The composite polymerization inhibition system not only has a high-efficiency polymerization inhibition function in the epoxy soybean oil acrylic ester preparation, but also is easy in recycling the main polymerization inhibitor, namely the free nitroxide radical polymer brush, so that the free nitroxide radical polymer brush can be recycled, and a product can be prevented from self-polymerization when being preserved when a small amount of the polymerization inhibitor is retained in the system.

The invention relates to a multifunctional nanomicelle for early diagnosis and phototherapy of tumors. The multifunctional nanomicelle comprises a monolayer functionalized lipid membrane shell, photosensitive molecules and optothermal absorbents, wherein the photosensitive molecules and the optothermal absorbents are embedded into the monolayer functionalized lipid membrane shell. The multifunctional nanomicelle has the advantages that the nanomicelle can be used for multi-modal imaging diagnosis such as early magnetic resonance imaging, photoacoustic imaging or near-infrared fluorescence imaging of cancer; multiple kinds of diagnosis effects can be achieved as long as a patient suffers from one contrast medium administration; since sensitivity is improved, contrast medium injecting dosage is further decreased, and toxic and side effects on the patient can be alleviated; when the tumors are under single-wavelength near-infrared laser radiation, chlorine 6 and Pdots inside the nanomicelle are capable of converting light energy into chemical energy and thermal energy effectively to produce a great number of ROS (reactive oxygen species) oxygen free radicals and overhigh heat at 50-60 DEG C, and the ROS oxygen free radicals and the overhigh heat are used for inducing apoptosis and necrosis of cancer cells, so that a photodynamic and photothermal collaborative therapy function is achieved; the multifunctional nanomicelle not only can be used as a contrast medium for cancer diagnosis, but also can be used as a therapeutic agent for collaborative therapy of the cancer.

A method of inhibiting the formation of oxygen-containing free radicals and derivatives of them during and following exercise is disclosed. It includes administering an amount of a supplement containing one or more compounds selected from the group consisting of pentose carbohydrates and derivatives thereof in conjunction with said exercise. The supplement is administered as a dose at one or more times selected from prior to, during and after exercise.

The object of the present invention is to provide a composition which is capable of going into erythrocyte or into cells, trapping not only oxygen radicals but also hydroxyl radicals, and preventing or improving various symptoms including hypertension, excessive sensitivity to cold, diabetes, Parkinson's disease, menstrual disorder, brain infarct, atopic dermatitis, hay fever, articular rheumatism, autonomic ataxia, and the like by oral intake. The present invention relates to an invention of a composition trapping radicals in organism comprising the steps of: roasting soy bean, wheat germ, adlay, husked rice germ, and rice bran, which are materials at a temperature of 50 to 150° C. independently, followed by steaming them independently, and fermenting them independently with each of said materials by adding at least one species of edible microbes selected from microbes belonging to Aspergilius oryzae, and after fermentation, adding fine powders of at least green tea powders, sesame, rosemary, acerola, yuzu, carrot, Gymnema Sylvestre and green barley to each of said materials thereafter mixing, further followed by making the mixture ultra fine powders with 30 to 50 μm.

The nano TiO2 can be uniformly dispersed in medium, then uniformly coated on the ceramic surface, and roasted at high temp. to make TiO2 nano particles uniformly distributed on the glaze, and do not affect degree of finihsed of glaze. The TiO2 can be reacted with surface water and O2 in the air under the sunlight, and can release atomic oxygen and hydrogen-oxygen free radical to kill bacteria.

The invention discloses an air purification method and system for catalyzing oxidizing and degrading volatile organic compounds (VOCs) and application. The air purification method includes the steps that air containing the VOCs enters an ozone generation device through an air leading device, free oxygen free radicals and ozone are produced, and at the same time, some organic compounds in the air containing the VOCs are degraded into small molecular compounds; the air treated by the ozone generation device enters a catalytic oxidation reaction device and is in contact with a catalyst in the presence of the free oxygen free radicals and the ozone, and then VOCs molecules are catalyzed oxidized and degraded to obtain once purified air; and then the once purified air enters a filter sterilization device to obtain secondary purified air, the filter sterilization device includes a photocatalytic filter assembly and an activated carbon fiber, and the photocatalytic filter assembly is loaded with active nanoparticles with sterilization properties. The air purification method and system and application can efficiently fully and deeply digested the VOCs at the temperature of -10-40 DEG C, and the purposes of deep degradation and purification of the air are completed.

Compositions and methods are disclosed for decreasing the amount and activity of matrix-degrading metalloproteinases (MMPs) in and around cells. The compositions and methods are useful for treating and / or preventing symptoms of diseases including but not limited to Hypertension, Type II Diabetes, and Metabolic Syndrome X. Such treatment is effected by normalizing the blood plasma's protease activity, reducing blood pressure, preventing membrane receptor cleavage, and reducing the levels of insulin resistance and oxygen free radicals in the blood stream.

The invention belongs to the technical fields of compound materials and functional polymer materials, and particularly relates to a controlled polymer / inorganic compound hollow microsphere and a method for preparing the same. The preparation method comprises the following steps that: the surface of a silicon dioxide hollow microsphere is modified by KH-550; and a nitrogen-oxygen free radical is inoculated to the surface of silicon dioxide, and the nitrogen-oxygen free radical is used for triggering the active free radical polymerization on the surface of a monomer to form a controlled polymer layer. The microsphere prepared by the method has the advantages of uniform size, good size stability, big mechanical strength, good compatibility with an organic substrate, difficult falling-off of the polymer layer, controllable thickness of an inorganic layer and the polymer layer, quite strong designability and wide application prospect.

The present invention relates to a toothpaste composition having tooth whitening effect, and more specifically, to a toothpaste composition which contains hydrogen peroxide, as peroxide releasing oxygen free radicals for the whitening effect, and silica with reduced contents of metal ions, to overcome the difficulty in long-term storage due to the release of oxygen free radicals resulting from degradation of peroxide by metal ions released from other components in the composition, and unsatisfactory tooth whitening effect. The toothpaste composition of the present invention does not release oxygen free radicals during storage, and so has excellent preservativeness and sustained tooth whitening effect.

The invention provides sunscreen repair gel and a preparing method thereof. With natural sunscreen astaxanthin, aloe extract, golden cypress extract and composite all-band sunscreen, synthetic screen is higher in sun-screening performance, well protects injured skin from ultraviolet and prevents sunburn, erythema and the like in postoperative skin; the astaxanthin can cross the outer wall of human cells to directly clear oxygen radicals in the cells and enhance reproductivity of the cells, allows excellent repair promoting and heal promoting performances, and allows higher speed of minimally invasive skin repair; in addition, by adding the natural sunscreen, the sunscreen repair gel is lower in allergy and free of toxicity. With the heal promoting repairing agent, skin moisturizer and other ingredients, the sunscreen repair gel is capable of preparing the injured skin faster and promoting healing of the injured skin. Therefore, the sunscreen repair gel is sun protective, excellent in repairing and heal promoting performances, safe and skin non-stimulating.

The invention discloses a water soluble mitochondrial targeting imaging probe and a preparation method thereof. The structural formula of compounds that form the water soluble mitochondrial targeting imaging probe can be formula (I), (II), (III), (IV), (V), or (VI). The water soluble mitochondrial targeting imaging probe has the characteristics of good water solubility, high resistance to photo-bleaching, high thermal stability, low toxicity, and high sensitivity. Hela, MCF-7, and NIH-3T3 cells are taken as the models to observe the distribution situation of the fluorescent probe in cells through a laser con-focal microscopy technology; the results show that the probe is mainly distributed in mitochondrial, and the targeting property is good. The test results show that the provided probe has the characteristic of strong mitochondrial targeting imaging performance on cancer cells and non-cancer cells; thus an effective means is provided for quantitatively research superoxide radicals in cells in time and space, and thus the pathologic and physiological mechanisms of active oxygen radicals can be researched.

The invention belongs to the technical field of production and preparation of health bedding fabrics for teenagers, and relates to a far infrared anti-electromagnetic wave body-perfuming sleeping bag used for teenagers, comprising nano selenium and traditional Chinese medicinal materials and capable of generating negative ions. Oxygen is necessary for life, life activities can not continue without oxygen, and a brain will die if no oxygen gas is supplied for 5 minutes, while 20% of oxygen forms oxygen radicals which are harmful for a human body during metabolism. The metallothionein in nano selenium-containing bee products has the effect of strongly scavenging free radicals, the nano powder of medical stone or tourmaline has a far infrared anti-electromagnetic wave function, and the molecules of nano silver antimicrobial agent and traditional Chinese medicinal materials such as sweet osmanthus flower, jasmine flower and peach flower penetrate into deep skin tissues at a depth of 3-5 mm. The sleeping bag provided by the invention can be automatically heated, and has the effects of promoting metabolism, tissue vitality and blood circulation and perfuming skin. The spontaneously generated negative ions have the effects of regulating surrounding air quality, enhancing immunity, and strongly killing bacteria and mites.

The invention relates to a synthesis method of a reactive hindered phenol oxidation-resistant polyolefin additive and application thereof. The synthesis method comprises the following steps that a catalyst and 2,4 dyhydroxyl diphenylketone are dissolved in a solvent according to the molar ratio to 1-1.2 to 1, stirring reaction is performed at the temperature of 40-60 DEG C for 2-8 hours, then allyl halide is slowly and dropwise added, constant temperature reaction is performed at the temperature of 40-60 DEG C for 2-6 hours, standing and crystallization are performed, and a product is filtered to obtain the reactive hindered phenol oxidation-resistant polyolefin additive. The reactive hindered phenol oxidation-resistant polyolefin additive is applied to a polyolefin composite material, can improve the compatibility between the additive and polyolefin resin, has the advantages of extraction resistance, difficult migration, difficult volatilization and no environmental pollution, can keep a lasting oxidation-resistant effect, can capture peroxy radicals and can also capture alkyl free radicals, can play the oxidation-resistant effect simultaneously in the surface and interior of a polymer and is high in oxidation-resistant efficiency.

The invention discloses a hyaluronic acid skin protection composition. The hyaluronic acid skin protection composition comprises: 1) a sulfhydrylated derivative of hyaluronic acid; and 2) at least one molecular weight of hyaluronic acid or salt thereof. The composition has unique advantages when used for skin protection, not only has multiple skin protection effects of the hyaluronic acid, but also has strong antioxidant capacity, and can effectively scavenge active oxygen radicals.

The invention discloses a composition for clearing tooth stains, which belongs to the technical field of oral health preparation products. The composition comprises substance capable of generating oxygen radicals, substance capable of forming gel or colloid, stabilizer, pH adjustor, wetting agent, anti-allergic agent, xylitol, flavoring agent and deionized water; and the appearance shape of the composition is gel or colloid. The composition for clearing the tooth stains has the advantages of stable property, difficult decomposition and liquefaction and long-term storage at the normal temperature, and is convenient to store, transport and use, so the composition can be operated and used not only by professional doctors in dental clinics and but also by patients at home.