48 results about "Catechuic Acid" patented technology

The invention pertains to a method for processing tea, in particular to a method for processing gyokurocha tea. The invention aims at providing a processing technique for producing a tea with excellent look, smell and taste to overcome the shortages of complex operation, high labor intensity, low production efficiency, small-scale production, low annual output and failing to meet the market demand in the traditional processing technique. The technical proposal of the invention is the method for processing the tea, which is characterized in that: the processing method comprises the following steps: (a) fresh tea spreading, (b) steaming the tea into green color and dewatering, (c) kneading, (d) drying for the second time, (e) stripping, (f) form regulation, (g) glazing, (h) adding fragrance, (i) selection. The tea processing method of the invention has the advantages of even and regular shape compared with the traditional technique, fragrance, tea water color, taste, color of the leaf bottom and higher content of chlorophyll, tea polyphenols, catechuic acid and theine better than the product produced by the traditional technique.

The invention discloses total phenyl propanoid extract and total phenol extract extracted from grassleaved sweetflag rhizome and its preparation method. Total phenyl propanoid extract mainly comprises beta -asaricin, alpha -asaricin, eudesmin, galgravin, veraguensin and other derivant with veraguensin as mother nuclide. Total phenol extract mainly comprises caffeic acid, protocatechuic acid, ferulic acid, vanillic acid and glucosides with vanillic acid as mother nuclide and other derivants. Total phenyl propanoid extract and total phenol extract of grassleaved sweetflag rhizome can be extracted through one or more of methods of solvent-extraction, solvent extraction, precipitation method, macroporous adsorbent resin, extraction by supercritical fluid, column chromatography, and liquid-liquid countercurrent distribution chromatography. Total percentage content of phenyl propanoids in the obtained total phenyl propanoid extract of Grassleaved sweetflag rhizome is 5-100% (w/w), wherein content of beta -asaricin and alpha -asaricin occupy 5-100% (w/w).Total percentage content of phenols in total phenol extract of grassleaved sweetflag rhizome is 5-100% (w/w), wherein content of caffeic acid and protocatechuic acid occupy 5-100% (w/w).

The invention discloses a feed additive capable of improving anti-stress and immunity of ruminants and a preparation method thereof. The feed additive capable of improving the anti-stress capability and immunity of ruminants is prepared from the following raw materials: bacillus subtilis powder, lactobacillus plantarum powder, saccharomycete powder, catechuic acid, xylooligosaccharide, calcium fatty acids, chromium nicotinate, medical stone, vitamin C, vitamin B1, nicotinic acid, pine pollen, tricalcium phosphate, manganese sulfate, soy isoflavone, berberine, soya bean meal, versioolor swallowwort root, herba ephedra, futokadsura stem, herba potentillae chinensis, ford manglietia fruit, ciliate desert-grass, ajuga decumbens, tangerine leaves, cow soapwortseed and table salt. The feed additive capable of improving the anti-stress capability and immunity of ruminants contains multiplex vitamins, trace elements and Chinese medicinal herb ingredients, and all the ingredients achieve a synergistic effect, so that the intestinal micro-ecological environments of ruminants can be effectively improved, the quantity of pathogens is reduced, stress reaction is reduced to a great extent, the immunity is improved and thus the disease incidence of ruminants.

The invention provides sunscreen containing a catechuic acid acetylated derivative. The sunscreen is prepared from raw materials including water, propylene glycol, caprylic/capric triglyceride, catechuic acid EGCG (epigallocatechin gallate) acetylated derivative, titanium dioxide, methoxycinnamic acid phthalic acid ester, C12-15 alkanol benzene formate, mineral oil, ethylhexyl salicylate, cetostearyl alcohol, steareth-2, methylparaben and essence. The sunscreen contains the catechuic acid EGCG acetylated derivative, ultraviolet absorptivity of catechuic acid EGCG molecules is used, lipid solubility of the sunscreen is improved by means of acetylation, bioavailability of the catechuic acid EGCG molecules in skin superficial cells is effectively enhanced, and accordingly, sun protection and ultraviolet injury repair effects are improved.

The invention discloses a method for determining the content of catechuic acid in tea and tea products. The method comprises the following steps: preparing a gradient standard solution by adopting resorcinol instead of catechuic acid reference substance, preparing a to-be-tested solution from tea or tea products, determining the absorbance of the gradient standard solution through a hydrochloric acid-vanillin developing system under the wavelength of 510nm, establishing a standard curve taking molarity as an x-coordinate and establishing a regression equation and then determining the absorbance of the to-be-tested solution, resolving the unit concentration of resorcinol in the to-be-tested solution from the regression equation, then calculating the content of catechuic acid in tea and tea products according to the dilution factor, resorcinol unit number contained in the unit relative molecular mass of the catechuic acid reference substance, and correction factor. The resorcinol used is stable in property, easily available and low in price, the problems that the resorcinol reference substance is limited in sources, expensive in price and high in determination cost can be solved, and the method is simple to operate, accurate in results and good in repeatability.

The invention belongs to the field of tea process and specifically relates to a processing method of green tea. The processing method comprises the following steps: material preparation, withering, rolling, fixation, secondary withering, hot rolling, drying and rewetting. According to the processing method of the green tea, by adjusting the processing steps, a green taste of the tea fully gives off and a flower fragrance is increased; fixation is performed after rolling, so catechuic acid, caffeine, amino acids, protein, organic acids and saccharides in the tea sufficiently interact with eachother to generate esters and other aromatic substances, so the nutrient structure of the tea is richer, aromatic components are increased and a bitter and astringent taste is reduced; and the green tea prepared by the processing method has light bitter and astringent taste and green taste, strong subtle fragrance, green and yellowish but not turbid tea liquor and good mouthfeel.

The invention provides a method for simultaneously determining four components in a herba cynomorii-containing sample, in particular to a method for simultaneously determining gallic acid, protocatechuic acid, catechin and phlorizin in the herba cynomorii-containing sample by using a high performance liquid chromatography (HPLC). According to the method, a standard product solution and a sample solution are determined by using the HPLC, and multi-gradient elution is carried out by using acetonitrile and 0.05% of a glacial acetic acid solution as mobile phases, so that the four components can be determined. Compared with the chemical composition determination method in the prior art, the method provided by the invention is simple in operation process, good in repeatability and high in accuracy, avoids the consumption of time and cost, can be used as an effective method for quantitatively controlling the quality of herba cynomorii, and is also used for detecting herba cynomorii-related effective components in Chinese patent medicines.

The invention provides a bacillus megatherium-containing desilting agent which comprises a biocatalyst, a nonionic surfactant, centella extract, ginger extract, liquorice extract, a bio-enzyme activator, ammonium molybdate, malic acid, protocatechuic acid, a vitamin complex, a matrix, a porous sodium activated zeolite powder carrier, halophilic bacteria, bacillus megatherium and an adhesive. The invention also provides an application of the bacillus megatherium-containing desilting agent in a salt eliminating underground pipe. By adopting the desilting agent provided by the invention, the chroma of water in the salt eliminating underground pipe is reduced that the residual chroma is reduced to 5.2-6.1 degrees after treatment; the salt content of water in the salt eliminating underground pipe is reduced that the salt content of water at an exit of the salt eliminating underground pipe is reduced to 0.47-0.49%; the hole blocking rate of the salt eliminating underground pipe is reduced that the hole blocking rate of water in the salt eliminating underground pipe is reduced to 10.0-11.2%; the desilting effect is good; and after one year of desilting, the dissolved oxygen (DO) in the water is as high as 5.0-5.7mg/l.

The invention relates to a use of protocatechuic acid and a composition containing the protocatechuic acid, in particular to a use of protocatechuic acid in preparation of products for preventing and/or improving symptoms caused by high-energy diet intake, and the symptoms comprise obesity, metabolic diseases caused by excessive fat, impaired liver functions and intestinal flora disorder. Protocatechuic acid has a wide application prospect in the fields of medicines, foods and feeds. When protocatechuic acid is applied to high-fat feed, intestinal tract micro-ecological environment disturbanceand liver metabolism burden and damage caused by high-fat daily ration can be effectively eliminated, so that the utilization rate of nutrient substances by animals is increased, the immunity of theanimals is improved, and the production performance of the animals is improved.

The invention provides a dredging agent containing pantotrophic paracoccus, which comprises biocatalyst, nonionic surfactant, extract of purslane, extract of peach leaf, extract of cactus, biological enzyme active agent, EDTA chelated boron , lactic acid, epicatechin, multivitamin, substrate, porous sodium-type activated zeolite powder carrier, halophilic bacteria, pantotrophic paracoccus, adhesive; the present invention also provides a desilting agent containing pantotrophic paracoccus Application in the salt-discharging hidden pipe; the dredging agent of the present invention has improved the speed of processing the saline-alkali land silt, and the time required for processing the saline-alkali land silt with a thickness of 8cm is 12-16 days; the mud removal rate per unit time has been improved, and within 1 year The sludge removal rate was 80.9‑82.6%; the dredging effect was good. After one year of dredging, the total phosphorus removal rate was 88.5‑91.2%, compared with 22.7% in the control group; the small molecule soluble carbon content was 60.2‑64.6%.

A preparation method of a catechin-chitosan loose nanofiltration membrane based on PAN-support, belongs to the technical field of a membrane. The invention allows two water-soluble natural substancesincluding catechin and chitosan to be blended at a certain ratio, and uses vitamin C and hydrogen peroxide as initiators, to adjust the pH value of the reaction, and to deposit chitosan modified by catechin on a PAN substrate. The obtained composite nanofiltration membrane has a relatively loose separation layer. The permeability of NaCl and Na2SO4 is 87.5% and 95.2% respectively, the rejection rate of the dyes including Congo red, magenta and crystal violet is 99. 6%, 98.7% and 98.5% respectively, and the permeate flux reaches 72L m<-2>h<-1>MPa<-1>.

The invention relates to the technical field of genetic engineering, in particular to saccharomyces cerevisiae engineering bacteria and application thereof in preparation of protocatechuic acid. According to the invention, on the basis of saccharomyces cerevisiae without ADH6, ADH7 and BDH2 genes, at least one of exogenous genes 4CL, ECH, vdh, vanA, vanB, metf1 and ligM is transferred; an endogenous gene MET6 is over-expressed; and/or at least one of endogenous genes MHT1 and SAM4 is knocked out, a new lignin bioconversion path is constructed in the yeast body, the path regulates and controls the demethylation of tetrahydrofolate metabolism intensified strains through the modification of the genes to promote the conversion of vanillic acid to synthesize protocatechuic acid, and the purpose of synthesizing protocatechuic acid by using lignin monomers and lignin is achieved. Not only can the utilization problem of the lignin be solved, but also the protocatechuic acid which is an important chemical raw material can be generated, and high-value utilization of the lignin is achieved.

The invention discloses a method for increasing polyphenol content in tartary buckwheat by high-pressure coupling germination. The method comprises the following steps of (1) putting tartary buckwheatseeds into a vacuum bag, and conducting vacuumizing and sealing; (2) putting the tartary buckwheat seeds into ultrahigh-pressure equipment for high-pressure treatment; (3) soaking the tartary buckwheat seeds in a sodium hypochlorite solution with the mass concentration of 1%; (4) washing to be neutral, and then adding hot water for heat treatment; and (5) cooling the tartary buckwheat seeds to room temperature after heat treatment, then sprouting under a constant temperature condition, and watering and supplementing water in the sprouting process. The method has the advantages that the content of vanillic acid, hypericin, aromadendrin, catechin, acetosyringone and catechuic acid can be remarkably increased under the stress action of 20 MP-30 MP ultrahigh pressure, and the health-care function of the tartary buckwheat in the aspect of oxidation resistance is improved.