374 results about "Selenium Compound" patented technology

A chitin-nano selenium compound for regulating immunity, delaying sanility and preventing cancer and cardiovascular disease is prepared from chitin (chitosan, water-soluble chitosan, or chitoligose) and Se compound through reaction.

A selenium yeast product for use in food, dietary supplements or drugs containing significant and homogeneous amounts of easily digestible organically bound selenium, in which the content of selenium compounds is in the range of between 1000 and 1600 ppm, and in which product the content of 1-selenomethionine constantly constitutes at least 55% of the total selenium content, and in which product the content of selenium in inorganic selenium compounds does not exced 1% of the total selenium content. Furthermore, a method of preparing a selenium yeast product for use in food, dietary supplements, or drugs whereby said yeast is cultivated on a minimal medium under aerobic conditions, while nutrients are added to the yeast during the cultivation to an extent corresponding to the consumption of said nutrients in the yeast; glucose and/or maltose are the sole sources of carbon in the feeding medium.

The invention discloses a method for preparing a coating with nitric oxide catalytic activity. The method comprises the following steps: mixing a selenium-containing compound, a sulfur-containing compound and a soluble copper salt with the NO catalytic activity with a compound of an o-phenol structure, a flavone compound and a flavonol compound or a flavanone compound in a buffer solution for polymerizing. The coating with the nitric oxide catalytic activity can be applied to surface modification of matrix materials of almost all the materials, geometrical shapes and topological structures. The double selenium bonds, double sulfur bonds, copper ions and phenolic hydroxyl group in the prepared coating with the nitric oxide (NO) catalytic activity have excellent free radical scavenging functions; and the selenium bonds, sulfur bonds and chelated copper ions contained in the material have the response functions on reduced glutathione (GSH). In addition, the copper ions contained in the coating have antibacterial functions. The coating is used for catalyzing NO release and also can be applied to all the fields related to free radical scavenging and GSH response functions.

A novel strain of lactic acid bacteria was found to be heat resistant and able to grow in a sulfur-limiting medium (SLM) containing a high concentration of sodium selenite. The microorganism is a non-spore forming and Gram-positive coccus, which is identified with >90% confidence using the API biochemical and sugar fermentation tests, ribotyoing and 16S rRNA sequencing as Pediococcus pentosaceus SP80. In the current study, P. pentosaceus SP80 grown on SLM containing 250 ppm sodium selenite produced both organic and inorganic forms of selenium. These selenium compounds can be separated using an anion exchange chromatography technique. The concentrations of selenium detected in the organic and inorganic fractions were 4.34 and 21.7 ppm, respectively. Selenium-enriched bacteria are useful as a source of selenium for supplementing the diets of animals and humans. Animals fed efficacious amounts of the selenium-enriched bacteria show improved feed conversion rates and higher levels of glutathione peroxidase (GPx) activity in heart, kidney and liver tissues indicating an increased absorption and retention of selenium over control diets.

The invention relates to a chitosan and carboxymethyl chitosan functionalized nano selenium compound preparation method, which belongs to the technical field of nano materials. The method is as follows: 1) sodium selenite is used as a selenium source, potassium iodide is used as a stabilizer, the sodium selenite is reacted with reduction agent ascorbic acid for a period of time (30min), and then a nano selenium sol is prepared after standing for ageing for 24 hours; 2) a nano selenium sol is prepared by washing with water, washing with alcohol, and centrifuging for removing impurities; and 3) a certain concentration of chitosan and carboxymethyl chitosan is dropwise added for preparation of a functionalized nano selenium compound. The advantages are that the preparation conditions of nano selenium are simple. The nano selenium nanoparticles are small and uniform, the dispersion is good, a polysaccharide nano selenium compound with opposite charges can be obtained by functionalized modification of the surface by use of the chitosan and carboxymethyl chitosan, and the stability and biocompatibility of the nano selenium can be improved.

The invention discloses a process for preparing copper indium selenide compound films by a successive ionic layer adsorption and reaction method. The steps comprise (1) preparing Cu-In mixed cationic precursor solution, (2) preparing anionic precursor solution, (3) processing coating by using the successive ionic layer adsorption and reaction method, and (4) heat treating. The process for preparing copper indium selenide compound films firstly employs two different complexing agents, such as trolamine (TEA) and citric acid (C6H8O7), to respectively complex CuCl2 and InCl3, thereby obtaining near-neutral mixed cationic precursor solution with pH=8-8.5, enlarging the using range of a substrate when settling CuInSe2 by employing the SILAR method, and preparing a CIS photovoltaic film which meets stoichiometric proportion and has fine appearance. The copper indium selenide compound films of the invention can be applied to film photovoltaic cell and light absorption layers of other solar cells with novel structure.

A production method of selenium-enriched jujube bud tea, comprising: 1. Preparation of a compound selenium preparation: the compound selenium preparation is prepared from a selenium-rich compound micro-fertilizer rich in selenium and various trace elements and a compound chemical fertilizer containing nitrogen, phosphorus and potassium to make. 2. Application of compound selenium preparation: apply solid compound selenium preparation to the roots 10 to 15 days before jujube bud germination; spray liquid compound selenium preparation on the surface of branch buds 5 days after jujube bud germination; 3. Selenium-enriched jujube bud tea The production of jujube buds: the best picking period is when the jujube buds have germinated to a length of 2 to 3 cm. After picking, spread the buds in time to dry, and the finished product is finished after killing, kneading, baking, drying, and baking. The invention utilizes wild mountain jujube and mountain jujube trees growing in a good natural ecological environment, introduces a special selenium-enriched fertilizer into the tree, enriches the organic selenium element in the jujube buds, and forms selenium-enriched jujube bud tea. A green nutritional drink is provided for people to prevent cancer, cardiovascular disease, Keshan disease, Kaschin-Beck disease and other diseases and to strengthen their bodies.

The invention provides a selenium-enriched fermentation liquor foliar fertilizer. The foliar fertilizer is characterized by being prepared by mixing a selenium-containing compound of which the volume fraction by mass is not larger than 5.5g/L and an absorption-enhancing fermentation liquor, wherein the selenium-containing compound is sodium selenite or amino acid chelate selenium. By means of the foliar application of the selenium-enriched fermentation liquor foliar fertilizer, the problems of selenium fixing and loss caused by the application of the selenium compound into soil can be well solved, and a selenium element can be absorbed rapidly and effectively by plants. Meanwhile, inorganic selenium is transformed into organic selenium, so that the selenium content of crops is effectively increased, and very high practicability is achieved.

Biocidal formulations that include a selenium compound selected from the group consisting of RSeH, RSeR′, RSeSeR, RseSeR′, and RseX, wherein each of R and R′ include an aliphatic or phenolic residue, and wherein X is a protecting group selected from the group consisting of a halogen, an imide, a cyanide, an azide, a phosphate, a sulfate, a nitrate, a carbonate, selenium dioxide, and combinations thereof, are provided. The selenium compounds may be incorporated into an acrylate polymer matrix, or may be incorporated into a molten plastic material. Methods for preventing growth of a species of interest on an object or in a composition are also provided.

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 invention relates to compositions comprising one or more prebiotics (e.g., one or more dietary fibers) in combination with selenium compounds, flavonoids and/or flavonols, and phosphatides. The invention also relates to methods of regulating disorders, specifically disorders of the intestinal tract and related disorders, by administering a composition of the invention.

The invention discloses a method for preparing nanometer anode materials for lithium and selenium batteries. The method includes steps of (1), coating a layer of carbon-containing polymers on selenide; (2), drying the selenide coated with the carbon-containing polymers, then placing the selenide in a furnace, filling the furnace with inert gas and carbonizing the selenide to generate carbon-coated selenide; (3), carrying out reaction on the carbon-coated selenide and solution with oxidizing substances (such as trivalent Fe<3+> ions), oxidizing selenium ions in the selenide to obtain elemental selenium and drying the elemental selenium to obtain the carbon-coated selenium electrode material with redundant internal spaces. The method has the advantages that sufficient spaces can be provided for selenium lithiation by selenium/cavity/carbon composite structures, polyselenide of lithium can be constrained in carbon spaces, and the electric conductivity and the electron transport performance of the materials can be improved by carbon layers; the problems of volume expansion of selenium and shuttling of poly-selenium compound in charge and discharge procedures can be effectively solved by the aid of the method, the cycle stability and the rate capability of the lithium and selenium batteries can be greatly improved, the volume energy density of the batteries can be increased, and the method has extremely high application potential.

The invention provides a fluorescent probe and an application thereof in dynamic detection of mercaptan, and relates to a fluorescent probe of which the fluorescence is strengthened in the presence of mercaptan and back to the original state in the presence of oxidizing substances. The fluorescent probe can be used for selectively and dynamically detecting mercaptan in cells. The fluorescent probe is characterized in that fluorochrome with certain overlapping in absorption and emission is adopted as a fluorescent matrix, such as fluorescein and rhodamine; and a dual-selenium bond structure is introduced to the fluorescent matrix as an active center in the reaction with mercaptan, thus realizing the selective detection of mercaptan; a reaction product of a dual-selenium compound and mercaptan reacts with active oxygen such as hydrogen peroxide, hypochlorous acid or nitrosyl peroxide and the like to regenerate the dual-selenium compound, and the reversibility of probe molecule is realized due to the fluorescence quenching property; and simultaneously, the fluorescent property of the probe molecule can be changed through the variation of the distance between fluorophores before and after the reaction of the dual-selenium compound and mercaptan and the influence of the variation to the fluorescent property of the whole compound.

The invention discloses a Co-Se compound nanotube@ foam Ni composite array material as well as a preparation method and an application thereof. The method comprises the following steps: firstly, Co salt and urea are dissolved in deionized water, foam Ni is added, and a Co precursor@ foam Ni composite is prepared through a hydrothermal reaction; then a Se source is dissolved in hydrazine hydrate, the obtained solution is mixed with deionized water, the Co precursor@ foam Ni composite is added, and the Co9Se8 nanotube@ foam Ni composite array material is obtained through a hydrothermal reaction.The raw materials and process equipment are simple, the preparation cost is low, the product yield is high, and the prepared composite is a 1D hollow-structured Co9Se8 nanotube array directly growingon a foam Ni substrate with good electrical conductivity, can directly serve as an electrode material to be applied to catalysis of water electrolysis for a hydrogen evolution reaction, shows excellent catalytic performance and has huge potential application value in the field of water electrolysis for hydrogen production.

The present invention relates to an electrolyte for the electroless deposition of a metal layer on a substrate, wherein the electrolyte is free of heavy metal stabilizers, cyanides, selenium compounds and sulfur compounds comprising sulfur in an oxidation state between −2 and +5, and in which instead a β-amino acid is used as stabilizer. In particular, the inventive electrolyte can comprise 3-aminopropionic acid, 3-aminobutyric acid, 3-amino-4-methylvaleric acid, and 2-aminoethane-sulfonic acid. Furthermore, the invention is directed to a method for the electroless deposition of metal layers utilizing an inventive electrolyte as well as the use of β-amino acids as stabilizer in electrolytes for the electroless deposition of metal layers in general.

A melatonin-nano selenium compound for regulating immunity, promoting sleep, enhancing memory power, delaying sanility and preventing cancer, cardiovascular disease and senile dementia is prepared from melationin and Se compound through reaction.

There is provided a method for removing selenium from an aqueous influent, comprising: adding a water-soluble reducing agent to an aqueous influent containing an oxidized selenium compound (Se^x, wherein x is the oxidation state and x>0); reducing said Se^x using said reducing agent at a temperature; removing said Se⁰ from said aqueous influent using a sorbent or a technique selected from the group consisting of filtration, coagulation, flocculation, clarification and centrifugation.

The presently disclosed and claimed invention is directed to anti-microbial orthodontic apparatus and anti-microbial orthodontic compositions comprising an effective amount of a selenium compound, kits containing same, and methods of producing and using said anti-microbial orthodontic apparatus and anti-microbial orthodontic compositions.

The present invention provides a method of removing mercury from water. The method includes depositing selenium or a reactive selenium compound on a support structure, such as reticulated foam. The support structure is then placed in contact with mercury laden water whereby allowing the selenium and the mercury in the water to react. The selenium deposited support structure retains the mercury thereby removing the mercury from the mercury laden water.

The invention relates to a nano-selenium compound fertilizer which is characterized by comprising the following steps of: a, preparing glycine modified nano-selenium; and b, preparing the nano-selenium compound fertilizer. The nano-selenium compound fertilizer is prepared by nanoscale red zero-valent selenium by a biological or chemical method, and the nanoscale zero-valent selenium is dissolved in water so as to form bright red transparent solution. The nano-selenium has strong biological activity and very high safety; and compared with inorganic selenium salt, the nano-selenium has the characteristics of low toxicity and high efficiency for which people hope best of all.