46 results about "Superoxide radical" patented technology

A method of synthesizing a doped carbonaceous material includes mixing a carbon precursor material with at least one dopant to form a homogeneous / heterogeneous mixture; and subjecting the mixture to pyrolysis in an inert atmosphere to obtain the doped carbonaceous material. A method of purifying water includes providing an amount of the doped carbonaceous material in the water as a photocatalyst; and illuminating the water containing the doped carbonaceous material with visible light such that under visible light illumination, the doped carbonaceous material generates excitons (electron-hole pairs) and has high electron affinity, which react with oxygen and water adsorbed on its surface forming reactive oxygen species (ROS), such as hydroxyl radicals and superoxide radicals, singlet oxygen, hydrogen peroxide, that, in turn, decompose pollutants and micropollutants.

The invention provides compositions and methods for treating or preventing the spread of infectious disease through topical or cutaneous contact with a formulation or article containing an organotellurium compound, or an inorganic or organic selenium compound, or formulation thereof, capable of generating superoxide radicals in the presence of an agent of infectious disease such as bacteria, viruses, fungi and protozoa.

The present invention encompasses methods and compositions for detecting pathogenic bacteria. Additionally, the present invention encompasses methods and compositions for catalyzing the dismutation of superoxide radicals. Further, the present invention encompasses methods for determining the antibiotic susceptibility of pathogenic bacteria.

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.

A metal oxide supported palladium catalyst comprised of a β-Bi2O3 / Bi2Sn2O7 hetero-junction catalyst support and palladium was developed. The catalyst was synthesized using a sol-gel technique as a nanocrystalline structure. In the presence of fluorene, an oxidant and ultraviolet irradiation, the catalyst converts the hydrocarbon to a mixture of fluorenol / fluorenone oxidation products. The close proximity between β-Bi2O3 and Bi2Sn2O7 heterojunction phases in the catalyst is thought to be responsible for the efficient charge separation and catalytic activity. An indirect chemical probe method using active species scavengers elucidated that the photo-oxidation mechanism proceeds via holes and superoxide radical (O2.−) moieties.

The present invention discloses a method for researching oxidation-resisting activity of localized chitosan sulfate. Said invention researches the oxidation-resisting activity of chitosan sulfates (HCTS,TSCTS,SCTS and TCTS) substituted in different position points, and finds that said four kinds of sulfate derivatives have the obvious action for inhibiting superoxide radical and hydroxyl radical, and have strong reducing power. Said four kinds of derivatives also have the strong action for inhibiting hemolysis induced by H2O2. Said invention can be used as basis for developing medicine for resisting senility.

Hemicelluloses may be extracted by alkaline peroxide treatment without removal of ferulate residues. Hemicelluloses prepared in this way retain their ability to gel. Such gelling hemicelluloses may be extracted with a number of different oxidizing species including hydrogen peroxide anion, hydrogen peroxide radical, hydroxyl radical, superoxide radical and oxide radical. A process has thus been developed for producing a hemicellulose gel that may be carried out at cold temperatures, thus facilitating enzymic co-processing, and that is high yielding and produces a gel that is light in color.

The invention discloses a visible light nano composite photocatalysis material and a preparation method thereof. According to the invention, AgSbO3 and SnO2 are composited, because that conduction band position of AgSbO3 is higher than the conduction band position of SnO2, in a photocatalysis reaction, photo-generated electrons on the AgSbO3 conduction band are capable of moving to the SnO2 conduction band, silver ions of AgSbO3 can not be reduced by photo-generated electrons, and thereby stability can be effectively improved. Simultaneously, the photo-generated electrons on the SnO2 and O2 in a degradation solution are reacted to generate superoxide radical (O<2-.>), HOO.HO.free radical can be generated in order, the active groups have strong activity, organic pollutants can be degraded, and the method can increase the stability of a silver-containing compound. The experiment result shows that the degradation rate of the composite photocatalysis material on methylene blue under visible light irradiation can reach more than 95% in 60 minutes.

The invention relates to the field of enzyme processing, in particular to a tea enzyme and a preparing method thereof. The preparing method includes the steps that unfermented tea and fully fermented tea serve as main raw materials, a proper amount of the unfermented tea and a proper quantity of petals are added, acanthopanax trifoliatus and moringa leaves are matched, zymophyte is adopted, and the nutrient-balance-rich compound tea enzyme is prepared with the grading fermentation method and the multi-time fermentation method. The tea enzyme and the preparing method thereof have the advantages that the tea enzyme prepared with the method is rich and complete in nutrient, and has rich theine, vitamins, amino acid and phospholipid and multiple biologically active substances such as tannin, saponin, flavone, polyphenol and an SOD enzyme; the preparing method is simple and easy to operate, the using ratio of the raw materials is high, and the tea enzyme can be industrially produced in a large-scale mode; rice vinegar has the effects of killing staphylococcus, escherichia coli and the like, and meanwhile acetic acid bacteria contained in the rice vinegar belong to aerobic microorganisms; superoxide radicals in fermentation liquid are removed, and the acetic acid bacteria assist microzyme in fermenting; tea enzyme liquid is safer, more efficient and more healthy in eating.

The invention discloses a method for degrading lignin using a visible-light response composite catalyst. The method comprises the following steps: attaching a visible-light response photosensitizer to the surface of a nano catalyst; and through interfacial electron transfer action, transferring the excited electrons generated by a visible-light excitation composite catalyst to the conduction band of the nano catalyst to form active substances such as superoxide radicals or superoxide anions on the surface of the nano catalyst, wherein the active substances generate an activating reaction with lignin to remove methoxy group in the phenyl propane structure unit of lignin and increase the hydroxyl value of lignin. The method disclosed by the invention has the following advantages: the benzene ring retention rate of the activation product is high; compared with the high-pressure catalytic hydrogenation degrading method, the technology can be performed at normal temperature under normal pressure, and the equipment cost as well as the energy consumption in the degrading process are reduced; and compared with the lignin enzymolysis method, the production cycle of the technology is short, and the cost is low. The highest content of total hydroxyl of the alkali lignin activation product can be increased by about 147wt% over the alkali lignin before degradation.

The invention discloses an alignment combination, an alignment film, an alignment method of the alignment film and a display panel, and relates to the technical field of liquid crystal display. On the premise of not affecting display effect of the display panel, influences of linear polarized ultraviolet light on photosensitive components in an optical alignment device are reduced, and service life of the optical alignment device is prolonged. The alignment combination comprises an alignment material and an inorganic photosensitive material capable of generating photo-generated charge carriers under excitation of the linear polarized ultraviolet light. The alignment material comprises an azo-type alignment material. The wavelength of the linear polarized ultraviolet light is 300-400nm. Superoxide radicals and hydroxyl radicals capable of enabling azo bonds to break under ultraviolet light can be formed by the photo-generated charge carriers, oxygen and water. The alignment film comprises the alignment combination. The alignment combination is applied to the display panel.

The invention discloses a method for extracting oxidation-resistant and water-soluble polysaccharide from abalone shells. The method comprises the steps as follows: S1, cleaning: soaking the abalone shells, removing seawater salt on the surface, and washing sediment and fungus impurities on the abalone shells with clear water; S2, soaking: soaking the abalone shells with an acetic acid solution for 6-10 h to remove surface substances of the abalone shells; S3, drying: draining the abalone shells and placing the abalone shells in a constant-temperature blast drying oven for drying at 90-100 DEGC for 30-50 min; S4, crushing: crushing and grinding the dried abalone shells and performing filtration to obtain abalone shell powder; S5, extraction: adding water for soaking, performing sufficientstirring extraction at 60-85 DEG C for 1-5 h, and performing suction filtration to remove residues; performing extraction for 2-3 times and mixing supernatants. Active polysaccharide in an extract isheteropolysaccharide and has higher activity for scavenging superoxide radicals and can be prepared into an antioxidant, the abalone shell resource is fully utilized, waste is changed into wealth, and the cost is low.

The invention provides a sulfur-induced stabilization treatment method for iron-rich antimony polluted soil, and belongs to the field of soil remediation. According to the method, S<2-> ions serve as a reducing agent and react with amorphous ferric hydroxide in the soil to release ferrous ions, part of the ferrous ions promote the amorphous ferric hydroxide in the soil to be recrystallized and converted into stable iron oxyhydroxide, meanwhile, part of the ferrous ions react with the amorphous ferric hydroxide to generate superoxide radicals, Sb (III) adsorbed on the surface of the amorphous iron hydroxide is promoted to be oxidized into the Sb(V) so as to significantly reduce the toxicity of the antimony, and the Sb (V) is embedded into the stable iron hydroxide structure during the recrystallization so as to significantly reduce the mobility of the antimony and avoid the secondary pollution caused by the release of the antimony.

The invention provides a compound health care product for calming the nerves and helping sleep. A compound health product for calming the nerves and helping sleep, mainly made of the following ingredients: by weight, 200-500 parts of walnut oil, 100-300 parts of jujube seed oil, 40-100 parts of wolfberry seed oil, and 20-70 parts of ganoderma spore oil parts, vitamin E10‑20 parts. The compound health product of the present invention starts from multiple dimensions such as blood, blood vessels, activation of the immune system, elimination of superoxide free radicals, provision of oxygen-enriched capacity, two-way immune regulation, sedation, liver and kidney protection, etc. through the synergistic cooperation of various substances. Eliminate physiological and psychological adverse factors that affect human sleep, improve sleep quality, and play a significant role in calming the nerves and helping sleep.

The present invention involves new nitrons carrying a positive charge, useful in trapping of free radicals and especially the superoxide radical, of general formula:

The invention relates to the field of environmental pollution, particularly to a preparation method of an organophosphorus pesticide-polluted soil repairing agent. The prepared organophosphorus pesticide-polluted soil repairing agent contains an organophosphorus photodegradation catalyst, which can produce superoxide radicals and hydroxyl radicals under solar irradiation to efficiently and thoroughly degrade organophosphorus pesticides such as phorate, terbufos and parathion. The organophosphorus pesticide-polluted soil repairing agent has the advantages of being simple, efficient, low in operational cost and free from secondary pollution and can be widely applied to restoration of various kinds of organophosphorus pesticide-polluted soil in farmland, dryland or abandoned factories.

The invention provides a tartary buckwheat cocoa solid drink with a health-care function and a making method thereof. The drink is mainly prepared from tartary buckwheat powder, cocoa powder, milk powder, a sweetening agent, an anti-caking agent, an emulsifying agent, mineral substances, vitamins, nutrition additives, other supplements and edible flavor and fragrance. The made drink has the functions of reducing blood glucose and lipid, regulating blood pressure, clearing off superoxide radicals, resisting oxidization, improving memory, cognitive power, learning ability and immunity and resisting tumors, and can be used for preventing and treating cardiovascular disease, diabetes, senile dementia and other diseases.

The invention discloses a preparation method of a manganese oxide octahedral molecular sieve and application of the manganese oxide octahedral molecular sieve in degradation of organic pollutants. Thecatalyst is prepared by calcining, refluxing, filtering, washing and drying a mixed solution of manganese carbonate, potassium oxalate, concentrated nitric acid and potassium nitrate. The catalyst isused for catalyzing and activating peroxydisulfate to generate sulfate free radicals, hydroxyl free radicals, superoxide free radicals and non-free radical singlet oxygen with strong oxidizing property, so that organic dyes and antibiotics are efficiently oxidized and degraded, and the catalyst can be recycled after reaction. The obtained catalyst can efficiently catalyze and activate hydrogen persulfate for multiple times at room temperature to generate sulfate free radicals, hydroxyl free radicals, superoxide free radicals and non-free-radical singlet oxygen to degrade organic pollutants, can be recycled and repeatedly used after reaction, has no obvious reduction in catalytic performance, can greatly reduce the industrial cost, accords with a green production principle and has a greatprospect in the field of organic wastewater degradation.

A hollow nanorobot is nanoenzyme (hemin-HMSNs) mainly composed of hollow mesoporous silica spheres (HMSNs) and hemin loaded on the surface of the hollow mesoporous silica spheres. The hollow nanorobothas the properties of peroxidase (POD) like and superoxide dismutase (SOD) like, and uses H2O2, superoxide radical (O2.<->), hydroxyl radical (.OH) as fuel, the chemical free energy released by catalysis of H2O2, superoxide radical (O2.<->), hydroxyl radical (.OH) by hemin is used as motive force to induce its own movement, and the movement area is larger. The conversion of ROS into non-toxic H2Ocan greatly improve the scavenging efficiency of ROS in cells.

The invention discloses a small-molecule fluorescent probe for rapidly identifying superoxide radicals, a preparation method and the application thereof, and belongs to the field of organic small-molecule fluorescent probes. The structural formula of the probe molecule is shown in formula (I). The designed small-molecule fluorescent probe for rapidly identifying superoxide radicals is simple to prepare, and mature in synthesis route. By means of the small-molecule fluorescent probe, O<2-> in cells can be rapidly and accurately detected, and fluorescence imaging studies can be performed. Therefore, the fluorescent probe can be used as a simple, rapid and sensitive O<2->-specific detection reagent and has a wide application prospect in the field of biological molecule detection.

The present invention involves new nitrons carrying a positive charge, useful in trapping of free radicals and especially the superoxide radical, of general formula:

The invention discloses a novel cyanide detoxification method synergistically mediated by superoxide free radicals and hydroxyl free radicals. Complex cyanide in cyanide-containing wastewater is broken through ultraviolet irradiation, filtering is carried out obtain a free cyanide solution, the free cyanide solution is subjected to electrochemical treatment through an electro-Fenton catalysis system capable of generating .O2 <-> and .OH at the same time, the electrochemical reaction is conducted under the strong alkaline condition, a cathode in the electro-Fenton catalysis system generates . O2 <-> and hydrogen peroxide, an anode efficiently activates the hydrogen peroxide generated by the cathode into .OH, the .OH firstly activates the cyanide into a .CN intermediate state species in an electron-deficient state, then .CN and .O2<-> are subjected to a nucleophilic addition reaction, the cyanide is further converted into a non-toxic product nitrate, the defect that the cyanide can only be converted into low-toxicity cyanate in a traditional cyanide detoxification process is overcome, and a new path for complete detoxification of the cyanide is developed.

The invention discloses preparation of self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets and application of the self-support ultrathin two-dimensional efflorescent manganese oxide nanosheets in efficient wastewater purification. A 2D Delta-MnO2 nano-material is prepared from potassium ferrocyanide, potassium permanganate and diluted hydrochloric acid. The nano-materialcan effectively produce hydroxyl radicals, superoxide radicals and singlet oxygen radicals, releasing of lattice oxygen with high oxidation activity is accompanied, and then, the nano-material can rapidly degrade phenol, bisphenol A, methyl orange, acid blue, Coomassie brilliant blue, rhodamine b, ciprofloxacin, norfloxacin, enrofloxacin, ascorbic acid and the like in a wide pH value range of 2 to 11, wherein the degradation of the bisphenol A can reach a second level. An efflorescent self-support structure is formed by two-dimensional nanosheets through self assembly, and thus, a new way isopened up for fine adjustment on structures and properties of two-dimensional materials; and the preparation method is simple in operation, short in cycle and high in economic benefit, thereby being applicable to large-scale production.

The plate reactor includes a rotatable plate coated with a thin film containing an active photocatalytic nanocomposite. In use, the plate is partially submerged in polluted water so that a portion thereof is exposed to air and light. The exposed areas of the plate gains oxygen from the air, which reacts with the photo-promoted electrons from the coating. This results in the formation of very reactive superoxide radical ions (O2−) and / or the generation of hydroxyl radicals (.OH), either of which can oxidize targeted organic matter and pollutants in wastewater when the exposed area is submerged during rotation of the plate, thus purifying the water. A plurality of paddles radially extend from the edge of the plate to mix the water during rotation.

The invention discloses a bismuth molybdate photocatalyst preparation method. According to the present invention, the nanometer photocatalyst is prepared with a surfactant polyethylene glycol as a template agent by adjusting the use amount of the template agent through a hydrothermal method; the prepared nanometer photocatalyst is characterized by using an X-ray diffractometer, a scanning electronmicroscope, an ultraviolet-visible diffuse reflection and specific surface meter, and the results show that the prepared bismuth molybdate is the mixture of cubic phase Bi3.64Mo0.36O6.55 and the monoclinic phase Bi2MoO6, and the morphology is the mixture of nano-sheets and nanoparticles; the photocatalytic degradation of rhodamine B and phenol by Bi3.64Mo0.36O6.55 / Bi2MoO6 is studied under visiblelight irradiation, and the influence of the use amount of polyethylene glycol on the visible light activity during the preparation of the photocatalyst is investigated, wherein the results show thatthe photocatalytic activity is the best when the use amount of polyethylene glycol is 20 g.L<-1>; 2.5 h visible light irradiation can achieve the decoloration of 100% Rhodamine B, and the degradationrate of phenol after 12 h irradiation reaches 35.15%; and the hydrogen peroxide produced in the system is determined by using a DPD spectrophotometry method, and the tests with tert-butanol, potassiumiodide and other capture agents are supplemented, such that it is surmised that the catalytic mechanism mainly comprises hole oxidation and superoxide radical synergistic oxidation.

The invention discloses a mitochondrial targeting superoxide anion imaging probe and a preparation method thereof. The mitochondrial targeting superoxide anion imaging probe has a structural formula shown in the formula I or I'. A series of the mitochondrial targeting superoxide anion imaging probes are designed and synthesized. A mitochondrial targeting group is introduced to a benzene ring of benzovalerolactone of the probe, can directionally target cell mitochondria and has high selectivity to cell mitochondria. Through esterification of two hydroxyl groups of 4-nitrofluorescein and diphenylphosphinyl chloride, a probe chain with double detection groups is introduced and can selectively detect superoxide radical. The probe realizes real-time and high-selectivity detection of superoxide anion production in mitochondria, does not react with other reactive oxygen in mitochondria and has specificity to superoxide anion detection.

The invention discloses a real-time dynamic detection system for generating superoxide radical through a light-catalyzed reaction. The system comprises an excitation light source, a photocatalyst containing container, a chemiluminescence probe containing container, a detection cell, a photomultiplier and a signal analyzer host, wherein both the photocatalyst containing container and the chemiluminescence probe containing container are communicated with the detection cell; the photomultiplier is used for converting an optical signal generated in the detection cell into an electric signal; the photomultiplier is connected with the signal analyzer host; the signal analyzer host is connected with a computer terminal. When the real-time dynamic detection system is used for detecting, online measurement can be performed, the operation is simple, and a sample does not need to be subjected to processes such as offline separation and computer detection. Therefore, the measurement speed is high, the working efficiency is improved, and the system is suitable for rapidly screening and evaluating the capability of generating superoxide radical in various photocatalytic materials and photosensitive molecules. According to the system, online real-time measurement can be realized, dynamic change of superoxide radical can be traced on line, and the generation and attenuation behavior of superoxide radical can be researched through dynamic information.

The invention discloses an organic composite photocatalyst for degrading medicines and pathogenic bacteria and a preparation method thereof, and belongs to the technical field of water pollutant treatment. In the method of the present invention, a simple green method is used to load cercosporin on the macroporous adsorption resin to obtain a supported photocatalyst. It can generate singlet oxygen, superoxide radicals, etc. under the irradiation of fluorescent lamps and even sunlight. These oxygen free radicals can react with drugs and pathogenic bacteria, so as to achieve the purpose of degrading drugs and pathogenic bacteria. The method can completely degrade drugs within 3 hours of reaction under light, these drugs include: antibacterial drugs: quinolones ciprofloxacin, gatifloxacin, moxifloxacin, ofloxacin, enrofloxacin , sparfloxacin, trimethoprim sulfonamides, and antiviral drugs: chloroquine phosphate. In addition, the photocatalyst can also effectively inhibit the pathogenic bacteria Staphylococcus aureus, realizing the simultaneous removal of drugs and pathogenic bacteria in water pollution.