197 results about "Methyl red" patented technology

The invention relates to a preparation method of a hair dye, especially to a preparation method for a botanical hair dye, and specifically relates to a preparation method for a hair dye based on a walnut green husk pigment. The preparation method comprises the following steps: striping walnut green husk, air drying in a shady place; crushing, sieving through a sieve of 70-90 meshes; adding green husk powder and acetone into a container with a solid-liquid mass ratio of 1:25-35 and an acetone concentration of 70-90%, oscillation processing the solution at a constant temperature of 40-50 DEG C for 10-14 h; centrifuging the solution for 2-4 times, filtering off impurities and collecting the supernatant; decompressing concentrating the solution at a temperature of 50-65 DEG C to obtain an ointment; and preparing the hair dye according to the following material ratios: 5-7% of the ointment, 85-87% of water, 0.5-1.5% of silicone oil, 0.5-1.5% of oil-solubility VE, 0.5-1.5% of VB, 3-5% of olive oil and 0.5-1.5% of white vaseline. The preparation method is simple, easy to operate and high in recovery rate. The prepared green husk pigment is granular, shows yellow under the developing effect of methyl red, has no escherichia coli, is suitable for exploitation of the hair dye, and helps to solve the problems that the conventional hair dye contains carcinogenesis substances and the natural hair dye is not exploited fully.

The invention provides a kind of Brevibacillus laterosporus (STP-B.latCGMCCNo.1119), the character follows this. G+, haulm shape, the shape is (0.4-0.5)*(2-2.5)mu. The spore adnation is from neutrality to sub-neutrality. The spore bursa will enlarge. Most of the spore is vertebra aitch, the remainder is disciform. VP-, ph value of culture fluid is 7.2, amylolysis-, gelatin dispergation-, decomposition casein+, katalase+, oxidase-, cirate -, dextrose aerogenesis-, dextrose acidgenesis+, L-arabinose acidgenesis-, xylose acidgenesis-, mannit acidgenesis+, azotate deocidisation+, methyl red+, pH5.7 growth+.

The invention relates to a food freshness indicator card taking indicated CO2 as a characteristic gas and a manufacturing method of the food freshness indicator card. The manufacturing method comprises the following steps: firstly, crushing a polylactic acid sample, dissolving by chloroform, after heating in water bath, laying on a clean glass grinding tool through a tape-casting process, and drying to prepare a basal membrane; and dissolving bromothymol blue powder and methyl red powder in an ethanol solution, after stirring, uniformly mixing with polyethylene glycol and methylcellulose powder, laying on the basal membrane, drying to obtain the indicator card, independently packing the indicator card, and adding a drying agent into the indicator card for controlling the humidity surrounding the indicator card and improving the accuracy of discoloring generated after CO2 is absorbed by the indicator card. According to the manufacturing method, a self-made polylactic acid membrane is used as the indicator card basal membrane and is smooth in surface, uniform in texture and bright and translucent in appearance, and thus vision errors are furthest reduced. Due to invention and application of the freshness indicator card, consumers can purchase healthy and high-quality foods, and Chinese food safety is greatly improved.

The present invention is solution pH value detecting test paper and its preparation process. The test paper includes color developing test paper sheet with test function, and the test paper sheet is soaked in the mixed ethanol and water solution of soap yellow, methyl red, bromcresol green, nitrate nitrogen yellow, phenolphthalein, Alizarine Yellow and Dadan yellow. The mixed solution has pH value of 5-8. The test paper is used in testing the pH value of solution, or the concentration of hydrogen ion and hydroxide radical ion. It is suitable for various solution, including ground water, underground water, industrial waste water, etc.

The invention relates to the field of detecting potash water glass, in particular to a method for quickly measuring the potash water glass for fluorescent powder. The method comprises the following steps of: 1) accurately weighing the potash water glass, and shaking up the potash water glass uniformly to obtain solution of the potash water glass; 2) adding a methyl red indicator into the solution; 3) titrating K2O by using solution of hydrochloric acid until the K2O turns red from yellow, and measuring the content of the K2O, wherein the solution is also used for measuring SiO2; 4) adding sodium fluoride into the solution, namely adding the sodium fluoride into the solution after measuring the content of the K2O, and dissolving the sodium fluoride to ensure that the solution turns yellow; 5) titrating silicon dioxide, namely adding standard solution of the hydrochloric acid when the solution turns red; 6) titrating the excessive hydrochloric acid by using the standard solution of sodium hydroxide until the solution turns yellow; and 7) performing a blank experiment, namely adding the standard solution of the hydrochloric acid, and performing the titration slowly by using the standard solution of the sodium hydroxide until the solution turns yellow. The method can quickly and accurately measure the silicon dioxide and the modulus in the potash water glass for the fluorescent powder.

The invention discloses rhodococcus ruber YMHL-1 capable of degrading nicosulfuron and applications thereof. The invention provides a strain namely rhodococcus ruber YMHL-1 capable of degrading residual nicosulfuron in wastewater, and the identification shows that the strain belongs to Rhodococcus. The strain is preserved in China General Microbiological Culture Collection Center, CGMCC in February 9th, 2015; and the preservation number is CGMCC No. 10542. The main biological characteristics are as follows: the Gram staining reaction is negative; the bacterial colony is in an orange yellow color, is in a round shape, and is opaque, the surface of the bacterial colony is rough and dry; the cell is in a sphere shape or short bar shape, does not have any flagellum, is motionless, and does not generate any spore; the strain is aerobic and chemoheterotrophic and cannot liquefy gelatin and hydrolyze starch; the enzyme contact reaction is positive, the V.P. reaction is positive, the methyl red reaction is negative; the strain cannot degrade casein, cannot reduce nitrates; and the strain can produce acids from glucose, can utilize glucose, fructose, and citrates, cannot utilize mannose, arabinose, and raffinose, and can reduce more than 90% of antibiotics in water through direct application.

A sensor for detecting a presence of bacteria in a perishable food includes a pH sensitive solution of bromothymol blue and methyl red mixed with an alkaline resulting in a pH value and a generally green color changing to a generally orange color responsive to exposure to a concentration of carbon dioxide. The solution is packaged in a gas permeable container using a TPX (PMP) thin film that allows an effective diffusion of carbon dioxide through the container. The pH level drops when acidic carbon dioxide comes into contact with the solution resulting from a formation of carbonic acid, making the solution an indicator of carbon dioxide concentration, and thus an indication of bacterial growth.

The invention relates to a piece of highly sensitive pH test paper and a preparation method thereof, wherein a developing strip is in the form of a piece of pH body paper, which is dipped in a reagent solution and then dried by hot air at constant temperature; the reagent solution contains an indicator; the formula of the indicator contains bromothymol blue, thymol blue, metanil yellow, m-methyl red, bromocresol green, nitrazine yellow, cresol red, phenolphthalein, para-nitrophenylazosalicylate sodium, titan yellow, fluorescent pigment orange red, 5% 4-nitrobenzenediazo-1-naphthol-3.6-sodium disulfonate solution and 30% dissolved ethanol aqueous solution; and the formula of the indicator further contains an aqueous colour fixing agent, a cotton wooden fibre mildew preventive, a special paper mildew preventive and a buffer neutralizer formed by modulating sodium hydroxide and phosphoric acid. The preparation method comprises the following steps of: adjusting the reagent solution till a pH value is up to 6-7.5, uniformly wetting the pH body paper, and drying through hot air at constant temperature. According to the invention, the reagent solution can be adjusted, so that the pH value is up to 6-7.5; steady and precise high sensitivity of the pH1-14 test paper is effectively increased; and the test paper is convenient and simple to use.

Water-based chemical indicator inks for ethylene oxide sterilization processes and methods for its use. The chemical indicator ink contains at least one pH indicator dye selected from the group consisting of Bromocresol green, Bromophenol blue, Methyl red, Ethyl orange, and combinations thereof. The pH indicator dye undergoes an irreversible color change when exposed to ethylene oxide vapor in the presence of low-temperature steam, but when exposed to other sterilization processes either does not undergo a color change or undergoes a color change that is different than is obtained when exposed to ethylene oxide.

The invention provides a humidity indicator which is really effective in environmental protection and comprises a carrier and solution used for soaking the carrier; wherein, the solution takes 30-80% of ethanol as a solvent and contains 0.00862-0.00992% of acid-base indicator and 0.8-13.8% of hygroscopic salt. The acid-base indicator is one of bromocresol green, bromothymol blue, thymol blue, thymolphthalein, bromophenol blue, methyl red, methyl orange, methyl yellow , neutral red and phenol red or the mixture thereof. The hygroscopic salt is alkali halide or alkali-earth metal halide. The humidity indicator of the invention has wide indicating range (capable of indicating 5-90% of ambient humidity) and high sensitivity. Diverse humidity indicators different in discoloration can be manufactured by adjusting the components. The humidity indicator of the invention has evident discoloration effect, simple use, reutilization, good suitability and extensive application.

The invention relates to a rice metabolism detecting reagent and method, concretely used in the condition of detecting rice metabolism. It mainly takes and dissolves nitrazine yellow/chlorophenol red, p-nitrophenol, bromocresol green/bromothymol blue/resorcinol blue, bromocresol purple, and hematoxylin/cresol red/bromophenol red/methyl red into alcohol, and mixing them uniformly to obtain finished product of raw reagent liquid. As detecting, taking a raw reagent liquid and adding distilled water to dilute the raw reagent liquid so as to form a liquid reagent, adding rice to the liquid reagent to react, observing the colors of rice and solution, judging the metalolism degree of the rice detected, the metabolism situation and color of the rice corresponds to green and passes through yellow and salmon pink into red region, where the green expresses new rice, yellow expresses old rice and salmon pink expresses deeply aged rice. The reagent of the invention is lower-cost and has simple manufacturing process; the operation is quick, accurate and convenient; the detecting method is simple, able to be used in both qualitative detection and quantitative detection.

The invention provides a mixed indicator. The indicator component of the mixed indicator provided by the invention is basically composed of bromothymol blue, methyl red and phenolphthalein. Detection of grease acid value with the mixed indicator provided by the invention has the characteristics of: convenience and speediness, and high stability detection result. Distinguishing can be realized easily only by visual inspection; operation can be carried out of a laboratory, and the detection process requires only a small amount of organic solvents, thus facilitating detection of a large number of samples. The mixed indicator can be used for dark color grease detection.

The invention provides a culture medium used for separating and screening lactic acid bacteria. The formula of the culture medium comprises the following components: relative to the dosage of 1000ml of a solvent, 5.0-15.0g of tryptone, 5.0-15.0g of beef extract, 2.0-10.0g of yeast extract, 1.0-3.0g of diammonium citrate, 15.0-25.0g of glucose, 0.2-2.0 mL of Tween-80, 2.0-8.0g of sodium acetate, 15.0-20.0g of agar, 2.0-30.0g of calcium carbonate, a compound acid-base indicator containing 0.01-0.5g of methyl red and 0.01-0.7g of bromothymol blue, 0.5-5.0g of ascorbic acid, 0.1-0.5g of L-cysteine HCl, and a selective antibiotic composed of 250000-500000 IU of polymyxin B and 0.01-0.05g of nalidixic acid, wherein the pH value of the culture medium is 6.8; and the solvent is composed of a primary solvent and a secondary solvent, the primary solvent is distilled water or aged seawater, and the secondary solvent is saline solution. The culture medium has the characteristics of being high in accuracy, obvious in authentication phenomenon and the like during separation and screening for lactic acid bacteria.

The invention discloses a quick determination method for PH value of a textile. Prior determination method has too many working procedures, and wastes time, and hurts the textile because of using a PH determination device. Extreme inconvenience is existent in production application, which is not benefit for quickly monitoring. The invention has flowing the steps that: filter paper is set under the textile which is to be determined, and extraction liquid is dropped in the textile surface, then force application is affected to the position of dropping the extraction liquid, and the extraction liquid permeates into the filter paper through the textile, afterwards, a mixed indicator is dropped on the position of dropping the extraction liquid, after color development, PH value is quickly determined through color in the filter paper, the mixed indicator includes phenothalin indicator, bromothymol blue indicator, methyl red indicator and thymol phenothalin indicator. The invention can determine the textile PH value which changes from 3.0 to 11.0 by application of complementary color in the mixed indicator under the condition of different acidity-basicity of indicator, therefore, the quick, simple, high accuracy determination for the textile PH value is achieved.

The invention provides a prodegradant which can dispel the organic phosphorus pesticide residue of chlorpyrifos. The used strain is Gram's stain reaction hysteroptosis Dsp-2 which is Sphingomonas sp. The main biology characteristic is G-; the thaliana is the rod type of asporous whose size is 1.0-1.5um; the scavenger enzyme is male and the oxidative enzyme is female which can not be hydrolysed starched and be gelatin liquidated; the methyl red reaction is female and not to produce the indole with the aquolysis temperature 80 deg. The Genbank landing number of the strain 16S rDNA is AY994060.

The invention discloses a composite adsorbing material of a metal organic framework and cuprous salt and a preparation method and application thereof. The adsorbing material is compounded by the metal organic framework HKUST-1 and cuprous salt and is a brand-new composite adsorbing material, wherein the HKUST-1 has a very high specific surface area and can form physical adsorption with azobenzene dyes such as methyl orange, and the cuprous salt is attached to the surface of the KHUST-1 and is uniformly dispersed, so that the adsorption capacity of the material on organic dyes is favorably improved. The preparation method disclosed by the invention is simple and feasible and is easy to realize; and furthermore, the composite material can be widely applied to organic dyes for removing azobenzene, and particularly has good application prospects in the aspect of removing dyes, such as methyl orange, Sudan red, reactive black, methyl red and dimethyl yellow.

The invention discloses a sulfur group hetero-structure nano material, a preparation method and application thereof. The nano material is Bi2S3/CdS, and the molar ratio of a bismuth source to a cadmium source is 1:1. Compared with the prior art, bismuth sulfide nano wires can be mutually combined with cadmium sulfide nano granules by simple one-step solvent heat, the raw materials are easily obtained, the preparation method is simple, and the yield is 88 percent; and when the material prepared by the method is applied to photocatalytic degradation of organic pollutants such as methyl red dye, the organic pollutants can be basically completely degraded in 20 minutes.

The invention discloses a cat urine pH indicating material, a pH indicating cat litter and a preparation method thereof. The cat urine pH indicating material takes one or more of common soybean curb residues, common starch, starch fiber, modified starch, plant fibers, dextrin and flour as carriers and contains a pH value mixed indicator which accounts for 0.001-2% of the total weight of the pH value indicating material, and the pH value mixed indicator comprises, by weight, m-methyl red or methyl red and an indicator A with the weight ratio of 1 to (1-15). The pH indicating cat litter consistsof the pH indicating material and basic bean curd cat litter, wherein the pH indicating material accounts for 1-100% of the total weight of the cat litter. The consistency of the pH indicating material carrier and the basic cat litter in the material is guaranteed, so that the pH indicating material in the bean curd cat litter product is uniformly distributed, and the pH value of cat urine can beinstantly, accurately and stably indicated. The cat urine pH indicating material and the pH indicating cat litter are low in production cost, non-toxic and non-radioactive, the preparation process issimple and feasible, and the cat urine pH indicating material and the pH indicating cat litter have the advantages of no dust, good degradability, convenient use, environmental friendliness and the like.

The invention relates to a detection method and particularly relates to a method for measuring the content of hydrogen sulfide in gas by titrimetric analysis. The method is characterized by comprising the following steps: quantifying the volume V1 of the gas containing the hydrogen sulfide, and absorbing the gas with a saturated silver sulfate solution; (2) additionally arranging a methyl red-methylene blue indicator into the saturated silver sulfate solution, performing titration with a standard sodium hydroxide solution, stopping titration when the color of the mixed solution is changed from purple red into greyish green, and accurately calculating the content of the hydrogen sulfide in the gas according to the volume V and the concentration C of the consumed standard sodium hydroxide, wherein a calculation formula is that H2S(ppm)=C*V*22.4*10<6>/(2V1). The method can be used for measuring 5-200,000ppm of the hydrogen sulfide in the gas, a repeatability error is not greater than 2% of two measured results, and a reproducibility error is not greater than 5% of the two measured results.

The invention discloses a pH sensitive freshness detection intelligent label, and a preparation method and application thereof, and belongs to the field of intelligent food packaging, the pH sensitivefreshness detection intelligent label takes bromcresol purple/methyl red as a color developing agent, and polyvinyl alcohol/methyl cellulose as a film forming base material; the polyvinyl alcohol andthe methyl cellulose are wide in source, safe and degradable; bromcresol purple and methyl red are used as common pH indicators and can respond to different pH values. Therefore, the prepared bromcresol purple/methyl red composite pH sensitive intelligent label can be used for accurately monitoring and detecting the freshness of food materials such as livestock and poultry, aquatic products and the like in real time so as to ensure the quality safety of food.

The invention discloses Fe-doped walnut shell activated carbon for treating dye wastewater as well as a preparation method and an application of the activated carbon. The Fe-doped walnut shell activated carbon takes walnut shells as a raw material and is prepared through acid solution treatment, inorganic salt treatment, pyrolysis treatment, activating treatment and high-temperature heat treatment. The Fe-doped walnut shell activated carbon has the Fe content of 2.15%(wt%), the specific surface area of 1779.31 m<2>/g, the maximum adsorption of 531.08 mg/g for methylene blue as well as the adsorption exceeding 500 mg/g for other dyes including methyl orange, malachite green and methyl red. The Fe-doped walnut shell activated carbon is high in adsorption capacity, high in adsorption speed, easy to recycle and reusable, and the treatment cost is greatly saved. Meanwhile, according to the method, the waste walnut shells are taken as the raw material, operation is convenient, the cost is low, secondary pollution cannot be caused, and agricultural waste is recycled.

Provided is a CO2 sensitive type indicator label manufacturing method. An ethanol solution of 10%-90% is prepared; methyl red of 0.07-0.12 g dissolves in the ethanol solution of 100 mL, and a methyl red ethanol solution is obtained; bromothymol blue of 0.08-0.15 g dissolves in the ethanol solution of 100 mL, and a bromothymol blue ethanol solution is obtained; the methyl red ethanol solution of 10-55 mL and the bromothymol blue ethanol solution of 15-50 mL are mixed and are diluted tenfold, and an indicator solution is obtained; glycerinum is added and is heated in a water bath at constant temperature, methylcellulose of 1.2-2.2 g is thrown in when the glycerinum reaches the rated temperature, and the mixture is continuously stirred at a high speed to form an even methylcellulose solution; as the temperature decreases, the viscosity of the solution is increased; indicator membrane liquid is obtained; the indicator membrane liquid is scratched off on cotton fiber paper, air blasting and drying are carried out, and a CO2 sensitive type indicator label is obtained. The CO2 sensitive type indicator label is applicable to rapid detection with 0-100% CO2 content in environment.

The invention discloses immobilized spore laccase as well as a preparation method and an application thereof, and belongs to the immobilized technical field and the wastewater treatment field. The immobilized spore laccase is formed by immobilizing spore laccase produced by a bacillus bacterial strain on DEAE(diethyl-aminoethanol)-cellulose through an ionic bond and a hydrogen bond, and has the extensive pH adaptive capacity and the heat resistnace of the spore laccase; in a solution containing an organic solvent, metal ions or an inhibitor, the immobilized spore laccase has stability which is stronger than that of free spore laccase. The preparation method of the immobilized spore laccase mainly comprises four steps of spore preparation, carrier pre-treatment, adsorption and collection, is simple and convenient to operate, and high in immobilization rate. The immobilized spore laccase provided by the invention has very strong dye discoloring capacity and has a highest discoloring rate up to about 95% while being applied to spinning dyes of methyl green, methyl red, cid red 1 and crystal violet. The carrier also can selectively adsorb the dyes to form complementary action with laccase.

The invention relates to a preparation method of triethyl phosphate. The method specifically comprises the following steps of: first, with ammonia gas as an acid-binding agent and methyl red as an indicator, reacting phosphorus trichloride with absolute ethyl alcohol to generate triethyl phosphite; filtering out the byproduct ammonium chloride and then, introducing a certain amount of oxygen for oxidization; and finally, distilling and purifying at reduced pressure to obtain the target product triethyl phosphate. The method provided by the invention has the advantages that the yield is high, the unit consumption is low, and the byproduct ammonium chloride can be used as a fertilizer; and the method is simple in production process, the raw materials are easily available and the production safety is high.

The invention relates to a preparation method of drilling core containing acid liquor indicator, which comprises the following components as calculated by the total weight 100% of the drilling core: 14% of epoxy resin, 2% of quadrol, 2% of acetone and 1% of methyl red. The preparation method has the following steps: mixing the above components; weighting the rock waste raw materal accounting for 14% of the total weight of the drilling core, and washing an performing oil treatment on the raw material by petroleum ether; drying for 3h under the temperature of 95 DEG C, cooling and adding 1% crystal violet; stirring a cementing agent with the rock waste raw material evenly, placing the mixture in a die and pressurizing by 7MPa-10MPa for 12h; and dismantling the die, drying the drilling core for 6h at the temperature of 95 DEG C, and naturally cooling to room temperature. The permeability, water sensitivity, salt sensitivity, velocity sensitivity, acid sensitivity and alkali sensitivity of the drilling core in the invention are similar to those of the natural core, which is proved by a stepped permeability tester and five-sensitivity tests; and the drilling core has good indicating effect on acid liquor.