18 results about "Bromocresol green" patented technology

The invention discloses a production method of a sweat-absorbent towel with a temperature monitoring function, and relates to the technical field of sweat-absorbent towels and selection and design of carriers. All-cotton gauze verified through experiments is selected, the thickness of the gauze is 3-4 layers, and the balance of the water absorption rate and the water retention rate is ensured; in order to increase the durability of the gauze, a layer of hydrophobic fibers is compounded on the outer surface of the gauze, and the sweat-absorbent towel can be obtained; preparing an indicator solution and preparing a bromocresol green solution; the concentration of the solution is controlled to be 0.4 mg / mL; preparing a sodium alginate solution, respectively taking 50ml of the bromocresol green solution and 50ml of the sodium alginate solution, namely mixing and uniformly stirring according to a volume ratio of 1: 1 to form a mixed solution; the mixed solution of the bromocresol green solution and the sodium alginate solution is adopted, the buffer solution is added to serve as the indicator, the bromocresol green solution is stable and rich in color, the bromocresol green solution turns blue from dark green after meeting water, the bromocresol green solution is an ideal color indicator, and the indication effect is improved.

The invention discloses a method for deacidifying Tan sheep fur double-face leather, and particularly relates to the technical field of fur processing, which comprises the following steps: S1, pretreatment before deacidification; s2, washing with water; s3, neutralizing with a neutralizing solution; s4, fat liquoring is carried out; and S5, performing subsequent treatment. According to the method for deacidifying the Tan sheep fur double-face leather, residual chemicals and scraps can be efficiently removed through multi-stage countercurrent water washing, in the neutralization step of the neutralization liquid, the temperature, the chemical proportion and the stirring speed are accurately controlled, bromocresol green detection is combined, it is ensured that the neutralization reaction is complete, the deacidification effect is remarkable, and the deacidification efficiency is high and thorough; through the fat liquoring step, the double-face leather fully absorbs a fat liquoring agent and recovers softness and glossiness, meanwhile, through pretreatment and optimized operation of all links, damage to double-face leather fibers is avoided, the quality of the double-face leather is guaranteed, the quality of the double-face leather is remarkably improved, through biological enzyme softening treatment, use of chemical agents is reduced, environmental pollution is reduced, and the method meets the environmental protection requirement; the environment-friendly benefit is outstanding.

This invention discloses a gel-like flange protection and monitoring material, its preparation method, and its application, belonging to the field of industrial flange protection and leakage monitoring technology. The material is a toothpaste-like extrudable colloid, comprising, by weight: 75-88 parts of protective matrix adhesive, 3-12 parts of pH-responsive core-shell microcapsules, 1-3 parts of interface compatibilizer, 2-5 parts of toughening modifier, 0.5-2 parts of anti-aging additive, 1-4 parts of thixotropic modifier, and 0.5-2 parts of anti-corrosion additive. The pH-responsive microcapsules use a compound of methyl red, bromocresol green, and thymol blue as the core material, with a particle size of 20-50 μm and a shell thickness of 2-3 μm. This invention replaces traditional flange covers with an extrusion coating method, eliminating the need for bolt fixing. It is suitable for flanges of various sizes, providing physical protection against impacts, dust, and media splashes. Simultaneously, it rapidly develops color when acidic or alkaline media leak, enabling naked-eye visual monitoring of the leakage location. It is convenient to construct and simple to maintain, and is suitable for flange protection in industries such as chemical, petroleum, water, and energy.

The application discloses a sweat detection device based on one-way liquid discharge composite paper-based fiber membrane and a preparation method, and relates to the technical field of sweat detection. The preparation method is as follows: SEBS is dissolved and then added into LiCl aqueous solution to prepare an electrospinning liquid, and the composite paper-based fiber membrane is prepared on a hydrophilic paper base layer through electrospinning; a microfluidic channel is written on the hydrophilic side of the composite paper-based fiber membrane; a bromocresol green aqueous solution is added into the microfluidic channel and dried to obtain a pH detection module; a mixed solution of ferric chloride and potassium ferricyanide is added into the microfluidic channel, a mixed solution of chitosan and sodium alginate is added after drying, and lactic acid oxidase or glucose oxidase is added, and a color developing agent is added after drying to obtain a lactic acid detection module and a glucose detection module respectively; the detection device has the characteristics of simple structure, convenient operation, high detection accuracy and good color developing effect, and can realize colorimetric detection of pH, lactic acid and glucose without cross interference.

The invention discloses a sweat detection device based on a one-way drainage composite paper-based fiber membrane and a preparation method, and relates to the technical field of sweat detection. The preparation method comprises the following steps: dissolving SEBS (Styrene-Ethylene-Butylene-Styrene), adding a LiCl aqueous solution to prepare an electrospinning solution, and carrying out electrostatic spinning on the hydrophilic paper-based layer to prepare a composite paper-based fiber membrane; writing a microfluidic channel on the hydrophilic side of the composite paper-based fiber membrane; adding a bromocresol green aqueous solution into the microfluidic channel, and drying to obtain a pH detection module; adding a mixed solution of ferric chloride and potassium ferricyanide into a micro-fluidic channel, drying, adding a mixed solution of chitosan and sodium alginate, adding lactate oxidase or glucose oxidase, drying, and adding a color developing agent to respectively obtain a lactic acid detection module and a glucose detection module; the detection device is simple in structure, convenient to operate, not prone to layering and damage, capable of achieving colorimetric detection of pH, lactic acid and glucose at the same time without crosstalk, and has the advantages of being high in detection accuracy and good in color development effect.

The application discloses a red dye solution, a reagent combination and a method for Masson trichrome staining, and belongs to the field of histochemistry technology. The red dye solution comprises 0.4-1.0% of bibracine, 0.4-1.0% of temptation red and 1-2% of acetic acid, and water is used as a solvent, and the red dye solution further comprises 0.05-0.15% of orange G sodium salt; the reagent combination comprises the red dye solution and further comprises a blue dye solution, the blue dye solution comprises 2% of aniline blue, 1-2% of acetic acid, and water is used as a solvent, and the blue dye solution further comprises 0.005-0.03% of fast green, 0.0025-0.015% of brilliant green or 0.005-0.03% of bromocresol green sodium salt. The reagent combination further comprises hematoxylin dye solution, red differentiation agent and blue differentiation agent. The improved red dye solution for Masson trichrome staining provided by the application increases the affinity for muscle fiber dyeing, makes the muscle fiber dyeing more firm, and can still maintain bright red after phosphomolybdic acid differentiation. Meanwhile, the improved blue dye solution makes the collagen fiber dyeing more bright, and the color contrast between the muscle fiber and the collagen fiber is more obvious and easier to distinguish.

The invention relates to the technical field of medicine, and particularly discloses a color-changeable wound infection monitoring dressing based on double indicators and a preparation method thereof.The color-changeable wound infection monitoring dressing comprises a medical base material layer made of porous medical gauze or a hydrogel material; the pH-sensitive color-changing layer is formed by compounding bromocresol green and phenolphthalein according to the mass ratio of (1: 1.5)-(1: 3) and is uniformly loaded on the surface of the base material layer; the isolation protection layer covers the outer side of the color changing layer and is composed of a sodium alginate-chitosan composite film, and the thickness of the isolation protection layer is 10-50 microns; the anti-interference layer is located between the base material layer and the color changing layer and comprises a metal ion chelating agent EDTA and an antioxidant ascorbic acid; through a bromocresol green-phenolphthalein double indicator synergistic color development mechanism, continuous dynamic monitoring of the pH value of the wound from weak acid to strong alkali is achieved, the color change gradient covers the whole infection development process, and the visual recognition degree of medical staff on early infection is remarkably improved.

The invention discloses a difunctional fluorescent probe based on a benzo [f] chromene derivative and application of the difunctional fluorescent probe in fish freshness indication and fluorescent dye, the structural formula of the fluorescent probe is shown in the specification, and the probe can generate obvious colorimetric and fluorescent dual response to various volatile amines in a water-containing medium, and has broad-spectrum recognizability, high sensitivity and wide pH adaptability. The two-channel visual indication label is prepared by compounding the two-channel visual indication label with bromocresol green according to the ratio of 5: 1, the label can turn green from yellow under sunlight and turn green from orange red under ultraviolet light after being contacted with amine steam, the two-channel color change of the indication label is highly synchronous with the TVB-N value change measured by the national standard, and the three grades of'fresh, qualified and rotten 'of fish meat can be accurately distinguished; and the reliability and the accuracy of the method in practical application are verified. Besides, the probe can also be used as a fluorescent dye, can be prepared into film coating liquid or ink, can be used for preparing luminous patterns and characters on glass, silica gel plates, filter paper and even flexible polyvinyl alcohol (PVA) films in manners of scribbling, stamping, dipping and the like, and shows application potentials in the fields of information recording, anti-counterfeiting and flexible photoelectric materials.

A preparation method of a pH response cotton swab for wound infection monitoring, first, natural cotton fibers are soaked in a bromocresol green solution for dyeing, and the color of the bromocresol green solution is blue during the dyeing process; the soaked natural cotton fibers are rinsed with a buffer solution; then, the excess buffer solution is squeezed out, the natural cotton fibers are dried, and orange-yellow natural cotton fibers are obtained; finally, the dried natural cotton fibers are fixed on the top end of a thin rod, and the pH response cotton swab is obtained. The color change of the pH response cotton swab after wiping the wound is used to quickly judge the type of wound infection of the patient, the pH value of 4.0-6.0 corresponds to acute wounds, the pH value of 7.0-10.0 corresponds to chronic wounds, corresponding treatment strategies are adopted based on the type of wound, which helps to improve the work efficiency of medical staff; at the same time, compared with the traditional form of dressing, the cotton swab avoids the secondary infection risk caused by multiple times of uncovering the dressing.

The application discloses a kind of detection methods for battery grade lithium salt purity, called lithium salt is placed in conical flask stirring dissolution;In the first solution to be measured, drop methyl red-bromocresol green indicator is added, and titrated with hydrochloric acid standard titration solution to wine red;Second solution to be measured, drop phenothalin indicator is added, and titrated with methyl red-bromocresol green indicator to wine red;Finally, the purity percentage of lithium salt is calculated.The detection method of the application can be effectively used for the analysis and detection of battery grade lithium carbonate, lithium hydroxide monohydrate and lithium oxide.Compared with the traditional method, the sample consumption is less, the hydrochloric acid consumption is less, and it is more environmentally friendly.Meanwhile, it can effectively solve the problem that the influence of carbonate ion consumption of hydrochloric acid is not considered in the traditional national standard, thereby improving the accuracy of detection.Meanwhile, the method can also be effectively used for the analysis and detection of battery grade lithium oxide.

The utility model provides a device for conveniently collecting and measuring bemisia tabaci honeydew. The device comprises a transparent cylindrical tube, a top cover is arranged at the top of the cylindrical tube, a base is arranged at the bottom of the cylindrical tube, and the cylindrical tube is sealed up and down; an air circulation window is formed in one side of the side wall of the cylindrical pipe; and the other side is provided with a small hole. An interlayer is arranged on the lower surface of the top cover, and agar and cotton leaves are placed in the interlayer. A groove is formed in the upper surface of the base, and bromocresol green filter paper is placed in the groove. The device is simple and convenient, cotton leaves are used for feeding, a relatively independent environment can be formed, sufficient air and food are provided for growth of test insects, the test insects can be prevented from escaping, interference caused by factors such as overlapping of plant leaves is avoided, and convenience and accuracy of bemisia tabaci honeydew collection and determination are improved. According to the bemisia tabaci honey dew collecting device, honey dew is collected through the modified transparent tube, experimental errors caused by flying activities of bemisia tabaci are reduced by utilizing a limited space, the space is saved, the cost is low, and the operation is convenient.

This invention belongs to the field of microbial culture technology. It provides a method for culturing cariogenic acid-producing anaerobic bacteria and its application. The culture medium comprises the following components in the following proportions: peptone 0.5-5%, sucrose 1-10%, sodium chloride 0.1-0.6%, bromocresol green 0.1-0.3%, bromocresol purple 0.01-0.15%, vitamin C 0.01-0.05%, Tween-80 0.01-0.06%, phenylethanol 0.01-0.25%, and deionized water, forming a liquid culture medium. Based on the specific requirements of bacterial culture, this invention is used for culturing bacteria from teeth and the oral cavity. Peptone is used as the nitrogen source, and sucrose as the carbon source. When bacteria multiply rapidly, they convert sucrose into an acidic substance, changing the pH of the culture medium. In the presence of bromocresol green / bromocresol purple, the color of the culture medium changes, allowing for the determination of bacterial content in the sample and the prediction of the risk of dental caries.

The present invention provides a Legionella Bozemania isolation culture medium and a preparation method thereof, which are used for selectively isolating and culturing Legionella Bozemania, and belong to the field of microbial technology. Its components include: sodium pyruvate, yeast extract powder, α-ketoglutaric acid, ferric nitrate, activated carbon, carbon black, L-cysteine ​​hydrochloride, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, glycine, bromocresol purple, bromocresol green, agar, vancomycin, natamycin, polymyxin B, and potassium hydroxide. By simple dissolution and mixing, high-temperature sterilization, and aseptic filling, a culture medium suitable for the isolation and cultivation of Legionella Bozemania is prepared. The culture medium of the present invention can accurately and quickly screen out Legionella Bozemania through simple isolation and cultivation, has high efficiency and specificity, is easy to obtain raw materials, effectively reduces costs, is convenient and quick to use, reduces the contamination risks and cumbersome procedures brought by self-prepared culture media, and is suitable for standardization and specialized research.

The invention belongs to the technical field of microorganisms, and particularly relates to an acid-producing strain for intestinal tracts of rocky mountain leafy monkeys and a separation and purification method of the acid-producing strain for the intestinal tracts of the rocky mountain leafy monkeys. The separation and purification method of the acid-producing strain comprises the following steps: (1) putting 0.1-0.6 g of monkey excrement into a centrifugal tube, adding 1-2 mL of sterile water, uniformly mixing in a vortex oscillator, taking 1000 mu L of turbid liquid by using a pipette, adding the turbid liquid into 50 mL of sterilized acid-producing bacterium enrichment culture medium, and culturing for 24 hours to obtain enriched bacterium liquid; the method comprises the following steps: 1) preparing a culture medium, 2) culturing with a bromocresol green culture medium, and 3) culturing with a CaCO3 selective culture medium, the strains B-5, B-13 and B-17 obtained through separation are smooth in surface, tidy in edge and thick in texture, acid tolerance test results show that when the pH value is 4.0 and 5.0, the survival rate of the strains is higher than 78%, and good acid tolerance is achieved.

The invention relates to the technical field of oral cavity examination, in particular to a CBCT image device for oral cavity examination and a using method.The CBCT image device for oral cavity examination comprises a lift provided with a CBCT bulb tube head and a sensor, and the lift is provided with a chin supporting table fixedly installed in the middle of the lift, and the sensor rotates by 360 degrees in an oral cavity through a steering end; four wireless image pick-up devices are uniformly distributed on the steering end head, and a movable spray head which is used for spraying a contrast agent and an auxiliary agent into the oral cavity to be matched with the CBCT bulb tube head for use is movably mounted in the steering end head. The chin supporting table is arranged on the elevator, the display and the sensor are arranged through the extension frame and the embedded pipeline in the chin supporting table respectively, the sensor is held in the mouth through the embedded pipeline, and a marking auxiliary agent which is specifically bromocresol green is adopted, so that a contrast agent can display color change; and a CBCT bulb tube head is combined to observe a mixture prepared from a contrast agent and an auxiliary agent, so that a visual and accurate judgment basis is provided for diagnosis and treatment analysis.

The application relates to the technical field of oral cavity examination, in particular to a CBCT image equipment for oral cavity examination and a use method thereof. The CBCT image equipment for oral cavity examination comprises an elevator provided with a CBCT ball tube head and a sensor, and is provided with a chin support table fixedly installed at the middle position of the elevator, the sensor rotates in the oral cavity at 360 degrees through a steering end head, four wireless cameras are uniformly distributed on the steering end head, and a movable nozzle for spraying contrast medium and auxiliary agent into the oral cavity to cooperate with the CBCT ball tube head is movably installed in the steering end head. The chin support table is arranged on the elevator, the display and the sensor are arranged on the extension frame and the embedded pipeline in the chin support table respectively, the sensor is realized to be sucked in the mouth through the embedded pipeline, the specific marking auxiliary agent is bromocresol green, the contrast medium can show color change, the mixed agent made of the contrast medium and the auxiliary agent is observed in combination with the CBCT ball tube head, and the intuitive and accurate judgment basis is provided for diagnosis and treatment analysis.

The invention discloses a decayed tooth pathogenic bacterium culture medium and a preparation method thereof, and relates to the field of microorganism culture and detection, and the key point of the technical scheme is that the culture medium comprises a culture solution and a hydrogen ion sensing membrane; the hydrogen ion sensing membrane is arranged in the culture solution; the formula of the hydrogen ion sensing membrane comprises a hydrogen ion probe, a cross-linkable ionic polymer, a cross-linking agent and a nano inorganic filler, the hydrogen ion probe is a mixture of at least one of bromcresol purple, bromcresol green, phenol red and methyl red and resorufin amyl ether; the hydrogen ion probe, the cross-linkable ionic polymer, the nano inorganic filler and the cross-linking agent are mixed and then cured to form the hydrogen ion sensing membrane. The aim of conveniently detecting the pathogenic bacteria is fulfilled.