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1106 results about "Boronic acid" patented technology

A boronic acid is a compound related to boric acid in which one of the three hydroxyl groups is replaced by an alkyl or aryl group. As a compound containing a carbon–boron bond, members of this class thus belong to the larger class of organoboranes. Boronic acids act as Lewis acids. Their unique feature is that they are capable of forming reversible covalent complexes with sugars, amino acids, hydroxamic acids, etc. (molecules with vicinal, (1,2) or occasionally (1,3) substituted Lewis base donors (alcohol, amine, carboxylate)). The pKₐ of a boronic acid is ~9, but they can form tetrahedral boronate complexes with pKₐ ~7. They are occasionally used in the area of molecular recognition to bind to saccharides for fluorescent detection or selective transport of saccharides across membranes.

Nano-selenium-containing amino acid foliar fertilizer and preparation method thereof

The invention discloses a nano-selenium-containing amino acid foliar fertilizer and a preparation method thereof. The nano-selenium-containing amino acid foliar fertilizer is prepared from such raw materials as molasses, animal hair, selenium dioxide, sulfuric acid, copper sulfate, manganese sulfate, zinc oxide, ferrous sulfate, ammonium carbonate, ammonium molybdate, urea, potassium chloride, boric acid, fulvic acid, a surfactant, ethylene glycol, sodium carbonate, quick lime or calcium hydroxide, phosphoric acid and water. The preparation comprises the steps of reducing selenium dioxide by use of the molasses to obtain nano-selenium, hydrolyzing the animal hair into an amino acid solution, and then performing the reactions of neutralization, complexing, emulsification and the like to obtain the nano-selenium-containing amino acid foliar fertilizer. According to the nano-selenium-containing amino acid foliar fertilizer, the problem of transforming inorganic selenium into nano-selenium and the problem of recycling waste both are solved; the fertilizer is capable of improving the water retention and drought resisting capability of plants and increasing the content of the organic selenium element content in crops; the preparation method of the fertilizer is mild in reaction conditions, simple in process, relatively low in production cost and prone to industrial production, and has excellent economic benefit, social benefit and ecologic benefit.
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