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432 results about "PH indicator" patented technology
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A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions (H₃O⁺) or hydrogen ions (H⁺) in the Arrhenius model. Normally, the indicator causes the color of the solution to change depending on the pH. Indicators can also show change in other physical properties; for example, olfactory indicators show change in their odor. The pH value of a neutral solution is 7.0 at 25°C (standard laboratory conditions). Solutions with a pH value below 7.0 are considered acidic and solutions with pH value above 7.0 are basic (alkaline). As most naturally occurring organic compounds are weak protolytes, carboxylic acids and amines, pH indicators find many applications in biology and analytical chemistry. Moreover, pH indicators form one of the three main types of indicator compounds used in chemical analysis. For the quantitative analysis of metal cations, the use of complexometric indicators is preferred, whereas the third compound class, the redox indicators, are used in titrations involving a redox reaction as the basis of the analysis.
Personal care compositions with color changing indicator
InactiveUS20060222675A1Easy to useEfficient disseminationCosmetic preparationsBiocidePersonal careDisinfectant
The invention describes a composition for use in disinfecting a surface for personal use, such as a public restroom facility or telephone. The composition and delivery of the composition provides for the placement of a thin layer of disinfectant which includes a acid-base indicator. The acid-base indicator disappears as the thin layer effects the germicidal activity of the disinfectant. The composition is also rapidly drying, so that the acid-base indicator disappears as well as the disinfecting composition leaving the surface dry. The invention also relates to use of the compositions in a lotion, such as a sunscreen. Use of the acid-base indicator provides a method to visualize where the lotion is applied by color, with the color then later dissipating.
Owner:C2C TECH
Absorbent article
A wetness indicator composition contains (a) 0.1% to 5% by weight of a pH indicator that is substantially colorless at pH 7 and develops a color in an acidic environment, (b) 20% to 90% by weight of a surfactant, (c) 5% to 55% by weight of a polyalkylene glycol, (d) 0% to 70% by weight of a polymer having a carboxyl group, and (e) 0.1% to 5% by weight of an acidic substance other than components (b) and (d). In an absorbent article including a topsheet 2, a backsheet 3, and an absorbent member 4 interposed between the topsheet 2 and the backsheet 3 and having applied thereon a hot-melt composition that changes color on contact with a body fluid, the wetness indicator composition is used as the hot melt composition.
Owner:KAO CORP
Method and device for detecting freshness of fish based on olfaction visualization
InactiveCN101936912AReduce dosageReduce extractionImage analysisMaterial analysis by observing effect on chemical indicatorSensor arrayTemperature control
The invention discloses a method and a device for detecting the freshness of fish based on olfaction visualization, which is characterized in that a computer is connected with a constant temperature control room and a scanner; a visual gas sensor array, the scanner, a reaction room and a sample room are arranged inside the constant temperature control room; detected gas diffused from a detected fish sample is in contact with the visual gas sensor array; the detected gas reacts with a porphyrins sensor, a pH indicator sensor or a solvation chromotropic dye sensor arranged in the visual gas sensor array; images before and after the reaction are collected by the scanner and input into the computer; and the freshness of the detected fish sample is determined according to the correlation between the color change of the three sensors and the variety and the concentration of the detected gas. The invention can ensure that the extraction quantity of characteristic values is reduced by determining the selection of the sensor type and the characteristic values; the synthesis course is simple, and the use quantity of the sensors is less; the gas can be fully contact with the sensors; the detection by human eyes can be utilized; and the use of the device is simple and convenient; the detection time only needs 3 to 5 minutes.
Owner:JIANGSU UNIV
Color-changing wallpaper adhesive primer/activator
InactiveUS6894095B2Speed up the flowGood spreadabilityNon-macromolecular adhesive additivesControlling laminationAdhesiveColor changes
Adhesives and primer compositions that include water, a polymer and a pH indicator. The adhesives and primers have a visually-detectable color when wet, and preferably dry to a clear or transparent film, while having good flow and spreadability. The adhesives and primers provide a visual indication of wetness by including a pH indicator such that when the composition is wet, the pH indicator is colored such that the color and the intensity of the color provides a visual indication of wetness; sufficiency of thickness; and uniformity of application of the adhesive or primer.
Owner:ROMAN DECORATING PRODS
Secretion-monitoring article
InactiveUS6921647B2Overcome disadvantagesReliable indicationMicrobiological testing/measurementVaccination/ovulation diagnosticsAmniotic fluidAbsorbent material
A secretion-monitoring article for identifying a secreted biological fluid having a body with an absorbent material and least one pH determining member and a reagent associated with the absorbent material is disclosed. The article can be embodied as a swab, gauze, panty shield, hygienic napkin, diaper or interlabial absorbent structure and can be used to indicate the presence of amniotic fluid, or secretions associated with bacterial, parasite, fungal, or yeast infections without giving a false positive result upon exposure to urine. The present invention also teaches a pH indicator mixture and method of attaching the indicator to a substrate for use alone or integrated in an absorbent body and further teaches a method for monitoring the health condition of a person using the secretion-monitoring article.
Owner:COMMON SENSE
Optical co2 and combined o2/co2 sensors
InactiveUS20060257094A1Improve temperature stabilityAccelerate emissionsMaterial analysis by observing effect on chemical indicatorFluorescence/phosphorescenceLuminophorePH indicator
Improved carbon dioxide sensors are disclosed which are less sensitive to the moisture content of the environment and which are substantially insensitive to oxygen levels under normal working conditions. The CO2 sensor comprises a pH indicator and long-lived reference luminophore and a porous sol-gel matrix. Combined CO2 and O2sensors are also described. Further disclose are methods of printing sensor onto substrates.
Owner:INVENT CENT THE
Method for concentrating highly effective nitrobacteria in active sludge
ActiveCN101240253AGrowth inhibitionGood removal effectBacteriaSustainable biological treatmentActivated sludgeHigh concentration
The invention discloses a enrichment method of nitrifying organism. The method adapts discontinuous activated sludge process by gradually improving ammonia nitrogen ph indicator in nutrient fluid to enrich. The main component of the enrichment nutrient fluid is inorganic salt comprising microelement Fe, Mg, Na, K and amortization liquor, in which inceptive concentration of NH(4)(+-N) is 100mg / L to 200mg / L, final concentration is 500mg / L to 1200mg / L and COD is less than or equal to 200mg / L. The method can restrain evidence the growth of sundry bacterium such as carbonizing bacterium, is propitious for nitrifying organism to become ascendency bacterium and resist more and more high ammonia nitrogen concentration, and finally disposing concentration of the ammonia nitrogen wasted water is up to 1200mg / L and high concentration ammonia nitrogen in wasted water can be reduce to less 10mg / L.
Owner:CHINA PETROLEUM & CHEM CORP +1
Serum-free medium for MDCK cell large-scale adherent culture and single-cell suspension culture
ActiveCN101760442ASupports adherent growthReduce the burden of separation and purification in the later stageVertebrate cellsArtificial cell constructsLipid formationSerum free media
The invention relates to the culture medium research and development technical field of modern biological technology and provides a serum-free medium for MDCK cell large-scale adherent culture and single-cell suspension culture, which comprises 21 amino acids, 6 vitamins, 8 salts, 8 lipids, 4 trace elements, 2 buffers, 1 protein hydrolysate, 1 acid-base indicator and 6 other additives. The serum-free medium can be prepared by the conventional preparation method, and an application method thereof is the conventional method. The serum-free medium has the beneficial effects that: the serum-free medium does not contain serum, has clear components, is beneficial for separating and purifying the product and improves the product quality; the serum-free medium supports long-term subculture of MDCK cells and does not require long-term and complex adaptation process; and the serum-free medium can well support the adherent growth and single-cell suspension growth of the MDCK cells, has clear components and easy preparation and utilization, and is suitable for mass production of biological products.
Owner:EAST CHINA UNIV OF SCI & TECH
Colorimetric artificial nose having an array of dyes and method for artificial olfaction
InactiveUS7261857B2Extensive and expensive signal transductionEliminate needAnalysis using chemical indicatorsMaterial analysis by observing effect on chemical indicatorSpectral responseAnalyte
The present invention involves an artificial nose having an array comprising at least a first dye and a second dye in combination and having a distinct spectral response to an analyte. In one embodiment, the first and second dyes are from the group comprising chemoresponsive dyes, and the second dye is distinct from the first dye. In one embodiment, the first dye is selected from the group consisting of porphyrin, chlorin, chlorophyll, phthalocyanine, and salen, or their metal complexes. In another embodiment, the second dye is selected from the group of dyes consisting of acid-base indicator dyes and solvatochromic dyes. The present invention is particularly useful in detecting metal ligating vapors. Further, the array of the present invention can be connected to a visual display device.
Owner:352 HENRY ADMINISTATION BLDG
Animal origin-free low-protein culture medium suitable for animal cell product production
ActiveCN101603026AEasy to separate and purifySuitable for productionTissue cultureFermentationLipid formationAntioxidant
The invention relates to an animal origin-free low-protein culture medium suitable for animal cell product production, comprising 24 basic metabolism nutrients, 11 vitamins, 3 transferrin substitute compounds, 5 lipid compounds, 2 nucleic acid compounds, 4 hormones and growth factors, 3 antioxidants, 1 shear-resistant protective agent, 1 pH indicator, 2 pH buffers, 9 other inorganic salts, soy hydrolysates adopted to substitute animal origin component, and composition of ferrous sulfate, ferric nitrate and EDTA-2Na adopted to substitute transferrin. The culture medium can be made by dissolving the aforementioned components in triply distilled water. The positive effects of the culture medium are as follows: the culture medium contains no animal origin component, the total protein content is lower than 10mg / L, which helps separate and purify products and is suitable for production of recombinant protein medicaments; the culture medium supports normal growth and long-term subculturing of animal cells; the culture medium can be used without adaptation, is easily prepared and is suitable for massive production of animal cell products.
Owner:EAST CHINA UNIV OF SCI & TECH
Infection activated wound caring compositions and devices
InactiveUS20130064772A1Easy to monitorReduced pHCompounds screening/testingBiocideHydronium ionMicroorganism
Provided are wound caring compositions and devices containing a pH-sensitive, preferably acid degradable, components contained in a water-permeable and hydronium ion permeable material. The pH-sensitive component encloses an antibiotic which is released to the wound upon infection by a microorganism at the wound site, and / or encloses a pH indicator. The antibiotic release is triggered by the microorganism's production of CO2 at the wound site which forms carbonic acid, lowers the pH at the pH sensitive components, and thus results in rupture of the liposome.
Owner:INDICATOR SYST INT
Color change surgical prep solution
InactiveUS20080081020A1Antibacterial agentsUltrasonic/sonic/infrasonic diagnosticsPh regulationSolvent
This invention discloses a surgical prep solution formulation, either film forming or non-film forming, that changes color upon a change in pH to indicate that the solvent has sufficiently evaporated. The major components of this surgical prep solution include: antimicrobial agents, solvents, pH adjusters, color changing pH indicators, and optionally: film forming polymers, dyes and viscosity regulators. The pH of the solution may rise or fall depending on the pH of the original solution as compared with the normal pH range of the acid mantle of the human skin or the normal pH range of a sterilizing solution. As the pH changes, the pH indicator may cause the surgical prep solution to change color. Concurrently, as the fluids evaporate, the pH indicators interact with atmospheric CO2, causing the solution to change color based on the pH of the solution. The solution may also be used as coating for medical devices.
Owner:CAREFUSION 2200 INC
Package for container of liquid medicine containing bicarbonate and pH indicator
InactiveUS6232128B1Dissipation of gas releasedNot easily breakableAnalysis using chemical indicatorsChemical analysis using titrationPlastic packagingEngineering
The invention relates to a bicarbonate-containing medical solution package. The package comprises a gas-permeable plastic container holding a bicarbonate-containing medical solution and a gas-impermeable plastic packaging member containing the gas-permeable plastic container. A carbon-dioxide atmosphere is established in the space between the container and packaging member. In addition, a pH indicating device is contained within the space between the container and packaging member. The pH indicating device is a gas-permeable plastic packet containing a bicarbonate-containing fluid (similar to the medical solution) and a pH indicator. The pH indicator undergoes a change in color in response to a change in pH of the fluid. Use of this package allows the easy monitoring of a change in pH and consequent aging of the medical solution due to prolonged storage or damage to the outer packaging member.
Owner:OTSUKA PHARM FAB INC
Absorbent article
A wetness indicator composition contains (a) 0.1% to 5% by weight of a pH indicator that is substantially colorless at pH 7 and develops a color in an acidic environment, (b) 20% to 90% by weight of a surfactant, (c) 5% to 55% by weight of a polyalkylene glycol, (d) 0% to 70% by weight of a polymer having a carboxyl group, and (e) 0.1% to 5% by weight of an acidic substance other than components (b) and (d). In an absorbent article including a topsheet 2, a backsheet 3, and an absorbent member 4 interposed between the topsheet 2 and the backsheet 3 and having applied thereon a hot-melt composition that changes color on contact with a body fluid, the wetness indicator composition is used as the hot melt composition.
Owner:KAO CORP
Plating media for the identification of Salmonella
InactiveUS7150977B2Reduce and eliminate responseElimination reactionMicrobiological testing/measurementAdditive ingredientBeta-Galactosidases
An isolation plating medium for the identification of Salmonella bacteria in a sample containing a plurality of different bacteria comprising a mixture of a carbohydrate capable of being a metabolic source for Salmonella bacteria and supporting colonies of Salmonella bacteria, a pH indicator dye that changes the color of the plating medium to a first color different from the color of the medium responsive to a change in the pH of the medium, a first substrate that does not react with Salmonella bacteria and injects color into the medium of a second color responsive to the presence of beta-galactosidase, the second color contrasting with the first color and the color of the medium, a second substrate that does not react with Salmonella bacteria and injects color into the medium of substantially the same color as the second color responsive to the presence of beta=galactosidase, and an ingredient for thickening the mixture in sufficient quantity to solidify the mixture.
Owner:R&F PROD
Multifunctional Organic Agricultural Fertilizer Composition and Process for Preparation Thereof
ActiveUS20170166488A1Reduce volatilityInhibit complexation/tieOrganic phosphatic fertilisersAgriculture gas emission reductionAdjuvantStimulant
The invention disclosed herein is a multifunctional agricultural organic bio-complexed composition comprising essential and non-essential nutritional elements; useful as a fertilizer, nutrient, bio-stimulant, complexing agent, pH controller, pH indicator, pH corrector, hard water salts in-activator, surface tension reducer, Spreader, penetrator, adjuvant, alkaline hard water ill effects mitigator, water conditioner and drip system irrigation cleaner. The invention also disclosed herein a process for preparation thereof.
Owner:CHAUDHRY SUUNIL SUDHAKAR
Oral-esophageal-gastric device to diagnose reflux and/or emesis
ActiveUS20110040211A1Simplify the viewing processMechanical/radiation/invasive therapiesElectromyographyMedicineCatheter
A system and method diagnoses esophageal reflux in a patient. A catheter includes a first pressure sensor configured to measure intra-abdominal pressure when the catheter is inserted into the stomach of a patient. A second pressure sensor is located proximal to the distal tip and configured to measure intra-thoracic pressure. A pH indicator is carried by the catheter body and configured to indicate that reflux has occurred in response to an involuntary reflex cough test. A processing device is configured to receive data regarding the first and second pressure sensors and regarding the pH indicator and process that data and assess if reflux is present during the involuntary epoch.
Owner:PNEUMOFLEX SYST
Cleansing compositions with color changing indicator
The invention describes compositions that can indicate whether hands have been washed for an approximate predetermined period of time. The composition includes an acid-base indicator and a delivery system.
Owner:CRAYOLA
Compositions of matter useful as pH indicators and related methods
Owner:BIOPROCESSORS CORP
Production of color-sensitive gas sensor array
InactiveCN101074931ADistinctivenessNotable featuresMaterial analysis by observing effect on chemical indicatorSensor arrayOrganic solvent
A method for preparing color-sensitive gas transducer array includes using hydrophobic prophyrin class compound and acid-base indicator as gas color-sensitive material, dissolving said color-sensitive material in organic solvent, using white Teflon material as base material of said transducer and processing Teflon material to be square block, making labels in certain size on square block, coating a layer hydrophobic white stabilizer on each label, fixing certain amount of gas color-sensitive solution on stabilizer at label of base, fixing one type of said solution on each label and obtaining said transducer array after organic solvent is dried.
Owner:JIANGSU UNIV
Visual, continuous and simultaneous measurement of solution ammonia and hydrogen ion concentration
ActiveUS20080076184A1High sensitivityEasy to detectMaterial analysis by electric/magnetic meansAnalysis by subjecting material to chemical reactionSaline waterQuantitative determination
Particular aspects provide novel devices and methods for accurately measuring total ammonia (NH3 plus NH4+) in a solution (e.g., freshwater and saltwater) by spatially proximate, simultaneous and continuous quantitative measurement of solution pH and ammonia. The devices overcome prior art inaccuracies relating to non-homogeneous sampling, and to spatial, temporal and thermal sampling discontinuities. Particular embodiments provide a combination pH and ammonia measuring device, comprising: a submersible member; a submersible non-bleeding ammonia-sensing portion attached to the submersible member and suitable to provide for a continuous visual indicator of solution ammonia concentration; a submersible non-bleeding pH-sensing portion attached to the submersible member and suitable to provide for a continuous visual indicator of solution pH; visual ammonia and pH indicator comparison means suitable for comparative quantitative determination of solution ammonia concentration and pH. Additional aspects provide novel ultra-sensitive devices and methods using same for measuring ammonia in air or solution.
Owner:PACIFIC SENTRY
Hot melt wetness indicator adhesive composition with controllable color change
InactiveCN1471410AAvoid defectsFilm/foil adhesivesAcid polymer adhesivesAdditive ingredientColor changes
The present invention is directed towards a hot melt wetness indicator composition based on an ethylene-alkylacrylate-acrylic acid terpolymer. The wetness indicator composition comprises the terpolymer, a tackifying resin, a compatible surfactant having a HLB value less than 20 and a pH indicator or a dye that is capable of changing color when insulted with urine, as the primary ingredients. One embodiment of the present invention is to provide a wetness indicator that has excellent heat and environmental stability, improved fastness, vivid color change, easy manufacturing, and easy application. Another embodiment is directed towards a composition having a delayed response and therefore can withstand multiple insults daily.
Owner:ATO FINDLEY
Color-changing wallpaper adhesive primer/activator
Adhesives and primer compositions that include water, a polymer and a pH indicator. The adhesives and primers have a visually-detectable color when wet, and preferably dry to a clear or transparent film, while having good flow and spreadability. The adhesives and primers provide a visual indication of wetness by including a pH indicator such that when the composition is wet, the pH indicator is colored such that the color and the intensity of the color provides a visual indication of wetness; sufficiency of thickness; and uniformity of application of the adhesive or primer.
Owner:ROMAN DECORATING PRODS
Method for making groove power semiconductor device
InactiveCN101101877AInhibition of channel punch throughReduce electric field strengthSemiconductor/solid-state device manufacturingSemiconductor devicesBreakdown strengthEngineering
The invention is concerned with the manufacture method of the ditch groove power semiconductor device. It is: provides the materials of the basal; forms the first electric transmit epitaxy layer on the basal; forms the second electric transmit zone and the ditch groove inside the epitaxy layer; forms the ebb first electric transmit area and the medium layer with the ditch groove; and then, forms the electric transmit area within the medium layer; forms the first electric transmit source area on the surface of the second electric transmit area; forms the second electric transmit contact area with higher doping PH indicator on the second electric transmit zone surface; forms the passivation layer cap on the top of the ditch groove which must with the medium layer and the electric transmit area; forms the diffusion protecting layer on the surface of the source area and the contact area; finally, forms the structure surface with good electric connection. The invention can control the threshold voltage of the device and improves the breakdown strength of the oxide layer of the device bottom area, and improves its electric connection reliability with no extra cover film printing plate and complex method request.
Owner:HARBIN ENG UNIV
Compositon for non-toxic, non-hazardous, and environmentally friendly humidity-indicating agent and its application
InactiveUS20050106735A1Material analysis by observing effect on chemical indicatorTesting waterCarcinogenAdditive ingredient
Cobalt chloride, copper chloride, and zinc chloride have been used as a humidity-indicating medium. European Union classified cobalt chloride as a category 2 carcinogen while repeated exposure to copper chloride can lead to copper poisoning. Zinc chloride is also known to be very harmful to the environment. These materials are very toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment. The present invention relates to composition for non-toxic, non-hazardous, and environmentally friendly humidity-indicating agent and its application to humidity indicator, specifically humidity indicator card and humidity-indicating desiccant. The present invention discloses a humidity-indicating agent comprising; pH indicator dye, color-enhancing additive, and natural hygroscopic salt such as magnesium chloride and sodium chloride. All of the ingredients are carefully selected from non-toxic, non-hazardous, and environmentally friendly materials. The humidity-indicating agent changes color reversibly as a function of the relative humidity.
Owner:GP&E AMERICA +1
Water vapor-sensitive color change ink and humidity-sensitive anti-counterfeit label
The invention discloses a water vapor-sensitive color change ink, which is prepared from a water-sensitive salt, a pH indicator, a binder and a solvent. The invention also discloses a humidity-sensitive anti-counterfeit label, comprising an indicating layer, a base layer, a stripping layer and a first adhesive layer which can be attached to a product, wherein the indicating layer is formed on the base layer, the adhesive layer is arranged on the first adhesive layer, and the stripping layer is arranged on the first adhesive layer; the indicating layer is formed by ink printing, and the ink is prepared from the water-sensitive salt, the pH indicator, the binder and the solvent. The invention can not only solve the problem that the humidity indicating ink is not friendly to a human body, but also can solve the problem that the humidity indicating ink is hard to print, and can not only solve the problem that anti-counterfeiting color change ink can only be screen-printed, but also can solve the problem that the anti-counterfeiting color change ink depends on liquid water.
Owner:XIAMEN LUSHAN NEW MATERIAL TECH
Use of color changing indicators in consumer products
The invention describes uses of various acid-base indicators in combination with consumer products, such as herbicides, where upon application the surface treated is visualized by color and then, with time, the color disappears.
Owner:C2C TECH
Method and apparatus for testing flow injection ammonia nitrogen color comparison
InactiveCN101226153ARealize automatic online measurementDetection is simple and fastMaterial analysis by observing effect on chemical indicatorPH indicatorVapor–liquid separator
The invention relates to a flow injection ammonia nitrogen color matching detection method, belonging to analytical chemistry technical field, which comprises injecting release solution as dilute NaOH solution into a capillary pipeline system connected with a gas liquid separator, injecting quantitative water sample to flow and circulate along with the release liquid in the capillary pipeline system, releasing ammonia from the water sample at the deep groove of the gas liquid separator and penetrate a ventilated membrane to be absorbed by acid-base indicator receive solution of more acid in another capillary groove at another side of the membrane, to change the color of the acid-base indicator, and feeding the receive solution absorbed with ammonia into a flow-through cell of a chromometer, using the photoelectric colorimeter to test the change of translucent photoelectric voltage and calculating out the ammonia nitrogen density of the sample water. The invention further provides a relative device. The invention can realize online detection of ammonia and nitrogen contents of water or solution quickly and simply, with accurate and reliable detected data, which only needs 50ul-1ml water sample injected in one time, low agent consumption, low cost and safe agents.
Owner:DELIN ENVIRONMENTAL PROTECTION TECH
Color-changing wallpaper adhesive primer/activator
Adhesives and primer compositions that include water, a polymer and a pH indicator. The adhesives and primers have a visually-detectable color when wet, and preferably dry to a clear or transparent film, while having good flow and spreadability. The adhesives and primers provide a visual indication of wetness by including a pH indicator such that when the composition is wet, the pH indicator is colored such that the color and the intensity of the color provides a visual indication of wetness; sufficiency of thickness; and uniformity of application of the adhesive or primer.
Owner:ROMAN DECORATING PRODS
Color changing correction fluid
InactiveUS20050075419A1Reliable indicationLow costOther chemical processesInksWater basedColor changes
An improved color changing correction fluid is provided which includes either a volatile base or a volatile acid in combination with a color changing pH indicator, all in a water based fluid or system. As the fluid dries, the volatile base or acid evaporates along with the water and the pH color changing indicator changes from a colored state to a clear state. For white paper, a white pigment is utilized and therefore the fluid changes from a colored state to a white finished state as the solvent water and acid or base evaporates. Different color pigments can be utilized to match the color of the particular paper or substrate.
Owner:SANFORD LP
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