67results about How to "Suitable for industrial production needs" patented technology

The invention discloses a synthesis method of sulfobutyl ether-beta-cyclodextrin with a specific average substitution degree. The synthesis method comprises the following steps: (1) dissolving beta-cyclodextrin into NaOH solution while stirring, wherein the use amount of NaOH solution is 1.6-6.5 times as much as the molar quantity of beta-cyclodextrin; (2) dropwise adding 1,4-butyl sultone and performing reflux etherification; when pH value drops to 8.8, adding NaOH solution to adjust the pH value to be between 8.80-9.70 until the pH value does not change; and then adding all residual NaOH aqueous solution into a reaction container from a sample injector; and (3) when detecting that the mass of residual beta-cyclodextrin in the reaction container is 1% or below, adding NaOH solution, wherein the use amount of NaOH solution is 0.4-1.5 times as much as the molar quantity of beta-cyclodextrin. By the synthesis method, a sulfobutyl ether-beta-cyclodextrin product with a specific average substitution degree can be obtained and the yield is high; in addition, the specific average substitution degree range of the synthesis product is concentrated and the composition of the product is in strict normal distribution; the reaction conditions are mild and post-treatment is simple.

The invention provides an industrial high-density mixed fermentation culture medium of bifidobacterium and lactobacillus, a fermentation culture method and a fungus powder embedding method. The fermentation culture medium is prepared from the following components: 0.3 to 1.5 percent of corn slurry dry powder, 0 to 1.8 percent of soya peptone, 0 to 1 percent of fructooligosaccharide, 0.5 to 1 percent of glucose, 0.4 to 1.35 percent of dipotassium phosphate, 0.4 percent of potassium dihydrogen phosphate, 0.015 to 0.02 percent of magnesium sulfate, and 0.05 percent of L-cysteine hydrochloride; orthe fermentation culture medium is prepared from the following components: 0.3 to 1.5 percent of the corn slurry dry powder, 0 to 1 percent of beef extract, 0 to 1 percent of the fructooligosaccharide, 0.5 to 1 percent of the glucose, 0.4 to 1.35 percent of the dipotassium phosphate, 0.4 percent of the potassium dihydrogen phosphate, 0.015 to 0.02 percent of the magnesium sulfate and 0.05 percentof the L-cysteine hydrochloride; the fermentation method comprises strain activation and culture, first-grade strain culture, second-grade seed solution preparation, 200L small tank culture in a workshop and 1T large tank culture in the workshop. Comparing the relatively traditional TPY culture medium, the viable count improves 10 times or more and the cost is reduced by 60 percent, meanwhile, according to the formula, raw materials are easy to obtain and the components are simple, so that the fermentation culture medium is suitable for industrial production requirements. The fungus powder embedding method is adopted so that the human body and external environment tolerance capability of strains is greatly improved.

The invention relates to a ceramic tile paper covering machine and belongs to the technical field of ceramic machinery equipment. A paper feeding device comprises a machine frame, a driving wheel and a driven wheel, wherein the driving wheel and the driven wheel are arranged on the machine frame, one end of the driving wheel is connected with a second driving motor, the other end of the driving wheel is connected with the driven wheel through a synchronous transmission device, a paper belt wheel is arranged above the driving wheel and the driven wheel, and a paper belt guide wheel is arranged under the driving wheel. Compared with the prior art, the paper feeding device has the advantages that the rotating paper discharge speed is identical to the paper belt walking speed, the paper feeding process is stable, the paper belt walking direction is definite, and the paper belt conveyance is smooth. The ceramic tile paper covering machine adopting the paper feeding device comprises a ceramic tile conveying belt and also comprises the paper feeding device and a cutter device, wherein the cutter device is arranged under the paper feeding device, and the ceramic tile conveying belt is arranged under the cutter device. The ceramic tile paper covering machine can realize the automatic paper covering on the surfaces of ceramic tiles, the work efficiency is greatly improved and is improved by more than 50 percent through being compared with that of the artificial flow line, and the industrial production requirements are met.

The invention discloses a chitin histone deacetylase mutant, and belongs to the technical field of bioengineering. 52nd-bit valine V of chitin histone deacetylase of obligate Salinispora arenicola is mutated to obtain glycine G, and a 66th-bit proline point P is mutated to obtain serine S. The chitin histone deacetylase mutant has the advantages that the specific activity of enzymes of the chitin histone deacetylase mutant is 3.92 times the specific activity of wild type enzymes as compared with the enzymes of the chitin histone deacetylase mutant prior to mutation; the chitin histone deacetylase is applicable to industrial production requirements, and social production requirements can be met.