11 results about "Bromocresol green" patented technology

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 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 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 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 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.