101results about How to "Low acid concentration" patented technology

Disclosed are modified release oral tranexamic acid formulations and methods of treatment therewith.

Tranexamic acid formulated in an oral dosage form with at least one agent that decreases tranexamic acid release in the stomach. Such formulations minimize nausea, vomiting, and other adverse gastric effects that may accompany tranexamic acid therapy, for example, to treat heavy menstrual bleeding. One embodiment is an extended release formulation with waxes, polymers, etc. that prevent a bolus release of tranexamic acid in the stomach. An alternative embodiment is a delayed release formulation with polymers that prevent release of tranexamic acid in the acid environment of the stomach and delay its release until the formulation reaches the less acid environment of the intestines. Such formulations enhance patient compliance with therapy because adverse effects of tranexamic acid therapy are reduced.

Disclosed are modified release oral tranexamic acid formulations and methods of treatment therewith.

The invention belongs to the field of high polymer materials and particularly discloses cornstalk nanocellulose whiskers and a preparation method and application thereof. The molecular chain structural formula of the cornstalk nanocellulose whiskers is shown as in the described formula (1), wherein n is a natural number less than 200, and the molecular weight of cornstalk nanocellulose is 10000-30000. The preparation method of the cornstalk nanocellulose whiskers is simple, and high-temperature high-pressure hydrolysis pretreatment is adopted for full fibering; compared with acid or alkaline pretreatment in other nanocellulose preparation methods, the pretreatment method has the advantages that chemicals in the pretreatment process are saved, difficulty in treatment of waste fluid in the pretreatment process is lowered, and further acid concentration of subsequent acid hydrolysis cellulose can be lowered.

The invention provides a foam plug diversion and acidification technology. The method is that: a high permeable layer is temporality blocked by injecting foam plug and utilizing the diversion ability of the foamed fluid, then the acid liquid is converted to a low permeable layer and then the uniform acidification with different permeability is realized and thus, the acid-soluble blockage of the reservoir is effectively solved; at the same time, the high carrying capacity of the foamed fluid and the expansion of the nitrogen can back-drain the acidified solid particles and the residual acid, which can decrease the secondary injury. The invention is especially suitable for solving the acid-soluble injury of the heterogeneous stratum.

Disclosed are modified release oral tranexamic acid formulations and methods of treatment therewith.

The invention relates to an aluminum alloy hard anodized film and a process method thereof. After degreasing and degreasing, the surface of the aluminum alloy workpiece is shot peened with clean stainless steel shot, and then hard anodized in an electrolyte with low sulfuric acid concentration, and hard anodized with low current density and then high current density The hard oxide film is obtained after treatment, the thickness of the oxide film is 340-374 μm, and the hardness is high, the film layer is dense, and it is beneficial to environmental protection and cost reduction.

The invention is intended to metabolize acetic acid and to lower acetic acid concentration in a medium at the time of xylose assimilation and ethanol fermentation by a yeast strain having xylose-metabolizing ability. The method for producing ethanol comprises a step of culturing recombinant yeast strains resulting from introduction of a xylose isomerase gene and an acetaldehyde dehydrogenase gene into a medium containing xylose, so as to perform ethanol fermentation.

Disclosed are modified release oral tranexamic acid formulations and methods of treatment therewith.

The invention provides a two-stage curing vanadium extraction method of stone coal vanadium ores. The two-stage curing vanadium extraction method comprises the following steps: (1) firstly, breaking and grinding the stone coal vanadium ores, and then adding water and concentrated sulfuric acid to the obtained ore powder and mixing evenly to obtain a mixture, wherein the mass of the concentrated sulfuric acid added accounts for 10%-15% of the mass of the stone coal vanadium ores; (2) curing the mixture, next, leaching the obtained mixture by use of water, and performing liquid-solid separation to obtain a vanadium-containing leaching solution and leaching slag; (3) adding concentrated sulfuric acid to the leaching slag and mixing evenly, next, curing, leaching the obtained mixture by use of water, and performing liquid-solid separation to obtain a vanadium-containing leaching solution and leaching slag, wherein the mass of the concentrated sulfuric acid added accounts for 10%-15% of the mass of the stone coal vanadium ores; and (4) blending the vanadium-containing leaching solution of the step (2) and the vanadium-containing leaching solution of the step (3). The two-stage curing vanadium extraction method of the stone coal vanadium ores has the advantages that side reactions in curing are effectively inhibited and the vanadium leaching rate is greatly increased. A two-stage low-acid curing method is adopted, the acid concentration is relatively low, and the curing process is clean and environment-friendly; and as a result, the two-stage low-acid curing method has a great industrial application prospect.

The invention discloses a low-energy-consumption preparation method for synthesizing high-purity folic acid. The method comprises adding 2,4,5-triamino-6-hydroxypyrimidine sulfate, p-aminobenzamide glutamic acid, trichloroacetone, sodium acetate and sodium pyrosulfite into water, performing docking reaction, adjusting pH by adding solid sodium acetate before the reaction is started and separately adding a sodium hydroxide solution during reaction and after the reaction is finished, and filtering; performing acid-washing and filtering in hydrochloric acid solution; adding a magnesium oxide solution into water for reaction, adding active carbon for decoloring, and filtering; adjusting pH value by using hydrochloric acid, cooling and filtering; and washing with purified water and filtering, drying the filter cake, so as to obtain the final product. By using the method for producing folic acid, energy consumption is reduced, also yield and product purity are improved, and also cost is substantially saved.

A method for measuring bromate ions includes: an adding step of adding a fluorescent substance whose fluorescence intensity changes by the coexistence of bromate ions to sample water; a measuring step of measuring the fluorescence intensity of the fluorescent substance; a difference calculating step of calculating a difference between the fluorescence intensity measured and a reference fluorescence intensity of reference sample water that contains no bromate ion; and a concentration calculating step of calculating bromate ion concentration from the calculated fluorescence intensity difference. The measuring step includes a step of measuring the fluorescence intensity at any one of a case where an excitation wavelength is 264 nm and an emission wavelength is 400 nm, a case where the excitation wavelength is 264 nm and the emission wavelength is 480 nm, and a case where the excitation wavelength is 300 nm and the emission wavelength is 400 nm.