90 results about "Reactive nitrogen" patented technology

RO membranes using chlorinated water as a feed stream maybe protected from damage by the chlorine with a protective layer including reactive nitrogen which forms chloromines on the surface of the membrane that reduce chlorine penetration. This protective layer also provides substantial anti-fouling capabilities, whether used with a chlorinated or unchlorinated feed stream because the chloramines are anti-bacterial. Although chlorine is lost in use, the anti-fouling layer or coating can be recharged with additional chlorine without damaging the discrimination layer. The anti-fouling layer or coating may be advantageously used with Thin film composite, TFC, membranes for use in forward and reverse osmosis may include nanoparticles, monohydrolyzed and/or di-hydrolyzed TMC, and/or alkaline earth alkaline metal complexes or other additives.

The present invention provides a method for growing group-III nitride semiconductor heteroepitaxial structures on a silicon (111) substrate by using a coincidently matched multiple-layer buffer that can be grown on the Si(111) substrate. The coincidently matched multiple-layer buffer comprises a single-crystal silicon nitride (Si₃N₄) layer that is formed in a controlled manner by introducing reactive nitrogen plasma or ammonia to the Si(111) substrate at a suitably high temperature. Then, an AlN buffer layer or other group-III nitride buffer layer is grown epitaxially on the single-crystal silicon nitride layer. Thereafter, the GaN epitaxial layer or group-III semiconductor heteroepitaxial structure can be grown on the coincidently matched multiple-layer buffer.

A bioreactor designed to produce N₂O from organic nitrogen and/or reactive nitrogen in waste is coupled to a hardware reactor device in which the N₂O is consumed in a gas phase chemical reaction, e.g., catalytic decomposition to form oxygen and nitrogen gas. Heat from the exothermic reaction may be used to generate power. The bioreactor may use communities of autotrophic microorganisms such as those capable of nitrifier denitrification, ammonia oxidizing bacteria, and/or ammonia oxidizing archaea. A portion of the N₂O dissolved in aqueous effluent from the bioreactor may be separated to increase the amount of gas phase N₂O product. The amount of the gas phase N₂O in a gas stream may also be concentrated prior to undergoing the chemical reaction. The N₂O may alternatively be used as an oxidant or co-oxidant in a combustion reaction, e.g., in the combustion of methane.

The invention relates to a fluorescent probe for detecting sulfur ions in mitochondria. The fluorescent probe is an RhS fluorescent probe, and the structural general formula of the RhS fluorescent probe is shown in the formula (I). The fluorescent probe can be rapidly positioned in the mitochondria and used for performing online real-time detection on the sulfur ions and hydrogen sulfide ions in the mitochondria. In addition, the probe also has relatively good chemical and optical stability, relatively good solubility and bio-compatibility and relatively high sulfur ion selectivity without interferences caused by other species such as reactive oxygen, reactive nitrogen and the like. Laser confocal imaging experiments show that the probe has relatively good cell permeability without causing toxic or side effects to cells and organisms.

The invention provides a method for synthesizing a nitrogen-carbon compound nonmetal reducing catalyst by utilizing concentrated sulfuric acid carbonization. The method utilizing an organic compound containing carbon, hydrogen and oxygen as a carbon source and utilizing melamine as a nitrogen source comprises the following steps of: preliminarily carbonizing the hydrogen and the oxygen in the organic compound containing the carbon, the hydrogen and the oxygen by utilizing dehydration characteristic of the concentrated sulfuric acid, so that the melamine enters a duct of the preliminary carbonizing product, and the nitrogen source is effectively fixed; carrying out high-temperature deep carbonization under the protection of the nitrogen gas to obtain a compound material which is effectively combined with the nitrogen and the carbon, so that the active nitrogen with the effect of promoting oxygen reduction catalysis has a good effect, and therefore, a nitrogen loss problem generated by the conventional high-temperature treatment method is avoided, and the oxygen reduction catalysis activity of the nitrogen-carbon composite material is effectively improved.

The invention belongs to the field of a catalyst and particularly relates to a nitrogen organic modified titanium-containing blast furnace slag catalyst with visible light catalytic activity and a preparation method thereof. The preparation method comprises the steps of after crushing titanium-containing blast furnace slag, mixing the crushed titanium-containing blast furnace slag with industrial urea and milling; adding absolute ethyl alcohol into mixed powder to carry out ultrasonic dispersion; then agitating and drying and conducting ball milling; pressing the mixture into a sheet and roasting under an oxidization atmosphere; roasting and cooling; and milling the product to be the diameter of 0.5-50 microns to obtain the nitrogen organic modified titanium-containing blast furnace slag catalyst with the visible light catalytic activity. The nitrogen organic modified titanium-containing blast furnace slag catalyst has strong light absorption and light responses under the stimulation of visible light with the wavelength range of 400-700nm, so as to realize the full-amount absorption of the visible light, and the visible light catalytic activity of the nitrogen organic modified titanium-containing blast furnace slag catalyst is obviously improved.

The invention relates to a preparation method of a reactive nitrogen-phosphorus flame retardant for aqueous polyurethane. The preparation method comprises: (1) adding 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide, a dicarboxylic acid with a double bond or an anhydride with a double bond, and a solvent A to a reaction container, uniformly mixing, carrying out an addition reaction for 12-24 hat a temperature of 140-180 DEG C under stirring, and carrying out vacuum drying on the mixture obtained by the reaction after achieving the reaction time to obtain a phosphorus-containing derivative;and (2) adding the phosphorus-containing derivative obtained in the step (1), diethyl bis(2-hydroxyethyl)aminomethylphosphonate, a water-carrying agent B and a catalyst C to a reaction container, mixing uniformly, carrying out an esterification reaction for 12-24 h at a temperature of 140-160 DEG C under stirring, and carrying out vacuum drying on the mixture obtained by the reaction after achieving the reaction time to obtain the reactive nitrogen-phosphorus flame retardant. According to the present invention, the reactive nitrogen-phosphorus flame retardant for aqueous polyurethane is prepared by the above method.

A process for covalently attaching an antimicrobial coating to a polymeric surface. The process comprises contacting the surface of the polymer with a plasma having reactive nitrogen compounds to provide a plasma-treated surface with —NHR groups, wherein R is hydrogen, hydroxyl or C_1-2alkyl, reacting the —NHR groups with a surface linking agent, and attaching an amine-containing polymer to the linking agent to form the antimicrobial coating. The surface linking agent is selected from the group consisting of dihaloalkyl, a dihaloalkenyl, and a dihalomethylaryl. The invention is also directed to a contact lens case or a contact lens with an antimicrobial coating.

Methods of generating hydrogen-containing streams having a minimal concentration of gaseous reactive nitrogen-containing compounds, e.g., ammonia, are provided. Hydrogen storage material systems are also provided that generate such hydrogen-containing streams. A first composition comprising a nitride, a second composition comprising a hydride, and a third composition having a cation selected from the group consisting of: alkali metals, alkaline earth metals, and mixtures thereof are combined together. The hydrogen-containing stream thus generated has a minimal concentration of gaseous reactive nitrogen-containing compounds.

The NR enzymes described herein were discovered in the red algae of Porphyra perforata (PpNR) and Porphyra yezoensis (PyNR). The present invention provides methods and compositions relating to altering NR activity, nitrogen utilization and/or uptake in plants. The invention relates to a method for the production of plants with maintained or increased yield under low nitrogen fertility. The invention provides isolated nitrate reductase (NR) nucleic acids and their encoded proteins. The invention further provides recombinant expression cassettes, host cells, and transgenic plants. Plants transformed with nucleotide sequences encoding the NR enzyme show improved properties, for example, increased yield and growth.

The invention discloses a dual-pulse quick nitriding method and device based on induction heating. A workpiece in a vacuum tube is subjected to quick heating and nitriding through a high-frequency power supply; the surface temperature of the workpiece and the pressure of nitriding gas in the vacuum tube are monitored through an infrared temperature detector and a pressure sensor; and a control system is used for controlling the workpiece to make pulse cycle within the set temperature range or be stabilized at the set temperature through a temperature signal, and controlling the pressure in the tube to present rectangular pulse change through a pressure signal. The dual-pulse quick nitriding method and device based on induction heating have the advantages that temperature pulses improve the vibration frequency and amplitude of surface atoms, pressure pulses improve the quantity of active nitrogen atoms in media, nitriding of nitrogen atoms is accelerated finally on the condition of dual pulses, and quick nitriding of metal is achieved.

The present invention relates to polysiloxane and the synthesis of photoresist containing the said polysiloxane. The synthesis process of the present invention includes using polymerizing template reagent with several reactive nitrogen-containing radicals, especially diamine reagent.

The invention discloses a method for preparing acetonitrile. The method comprises the following steps: heating waste organic plastic in a reactor in the presence of a catalyst and carrier gas and reacting; then cooling and separating to obtain a liquid product containing the acetonitrile, wherein the catalyst is composed of a carrier and active metal oxide, the carrier gas is composed of reactivenitrogen-containing compound gas and random inert gas and the reactive nitrogen-containing compound gas is selected from ammonia gas, methylamine gas, dimethylamine gas, ammonium salt pyrolysis gas, urea pyrolysis gas or a combination thereof. According to the method disclosed by the invention, the waste organic plastic is used as a raw material and an acetonitrile product is highly selectively prepared through a simple preparation process, the environment pollution can be reduced and waste utilization is realized. Furthermore, the method is a renewable, green and environment-friendly route ina whole process from the raw material to a production technology and has a great industrial prospect.