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Relevant bibliographies by topics / Neutralization indicators

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Academic literature on the topic 'Neutralization indicators'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Neutralization indicators"

1

Sajin, Kattuvilakam Abbas, G. Pillai Preeja, and P. Iyer Pavithra. "A Study on Acid – Base Indicator Property of Flowers of Impatiens Balsamina." Pharmaceutical and Chemical Journal 5, no. 5 (2018): 88–92. https://doi.org/10.5281/zenodo.13925422.

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Indicators are used to determine the equivalence point in acid – base titrations (neutralization titrations). They exhibit sharp color change with respect to change in pH. Popularly used indicators for neutralization titrations are synthetic chemicals. They are found to have hazardous effects in human body. The highly colored pigments obtained from plants are found to exhibit color changes with variation in pH. A study was done to check the indicator action of aqueous extract of flower pigments and compared with that of already existing synthetic indicators. Extraction was done using hot

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Hone, Duncan C., Brian H. Robinson, David C. Steytler, Roger W. Glyde, and John A. Cleverley. "Article." Canadian Journal of Chemistry 77, no. 5-6 (1999): 842–48. http://dx.doi.org/10.1139/v99-082.

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We have used stopped-flow kinetic studies to conduct an investigation into the acid neutralization reaction between overbased detergent additives and aqueous acid dispersed as w/o microemulsion droplets. Water-soluble pH indicators have been used to monitor the change in pH during the reaction. The acid neutralization rate was found to be dependent on the concentration of overbased additive, the temperature of the system, and the hydrocarbon chain length of the solvent. The systems are of importance in relation to the mechanism of acid neutralization by engine lubricants.Key words: overbased d

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Abbas, Sajin Kattuvilakam. "Study of acid-base indicator property of flowers of Ipomoea biloba." International Current Pharmaceutical Journal 1, no. 12 (2012): 420–22. http://dx.doi.org/10.3329/icpj.v1i12.12452.

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Indicators help to determine the equivalence point in acid base titrations (neutralization titrations). They show sharp color change with respect to change in pH. Commonly used indicators for neutralization titrations are synthetic in nature. They are found to posses hazardous effects in human body. The highly colored pigments obtained from plants are found to exhibit color changes with variation of pH. A study has been done to investigate the indicator activity of aqueous extract of flower pigments and compared with that of already existing synthetic indicators. Pigments were extracted usin

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A., K. lndrayan. "Natural dyes as neutralization indicators-a short review." Journal of Indian Chemical Society Vol. 80, May 2003 (2003): 505–9. https://doi.org/10.5281/zenodo.5839478.

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Deparatment of Chemistry, Gurukula Kangri University, Hardwar-249 404, India <em>E-mail:</em> akindray@sancharnet.in <em>Manuscript received 12 November 2002</em> Some of the naturally occurring coloured substances are pH-sensitive giving distinctly different colours in acid and basic mediums. Some of them, like the red cabbage aqueous extract, are colour-sensitive even to the same medium pH variation also and make a very good laboratory experiment for pH determination. Anthocyanidins are among the commonly occurring natural pigments. Natural colours giving a sharp, distinct and stable colour

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Pagariya, R. F. "GREEN CHEMISTRY: ROSELLE’S COROLLA EXTRACT AS A SUBSTITUTE FOR HAZARDOUS INTERNAL INDICATORS IN VOLUMETRIC ANALYSIS." International Journal of Research -GRANTHAALAYAH 7, no. 9 (2019): 118–22. http://dx.doi.org/10.29121/granthaalayah.v7.i9.2019.567.

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Indicators used in acid-base titration show well marked changes of colour in certain intervals of pH. Most of these indicators are organic dyes and are of synthetic origin. Today synthetic indicators are the choice of neutralization titrations. But due to environmental pollution, availability and cost, the search for natural compounds as an acid-base indicator was started. The present work highlights the use of the ethanolic extract of the corolla of Roselle (Hibiscus sabdariffa) as a pH indicator in strong acid-strong base, strong acid weak base, weak acid strong base and weak acid-weak base

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Dr., R. F. Pagariya. "GREEN CHEMISTRY: ROSELLE'S COROLLA EXTRACT AS A SUBSTITUTE FOR HAZARDOUS INTERNAL INDICATORS IN VOLUMETRIC ANALYSIS." International Journal of Research - Granthaalayah 7, no. 9 (2019): 118–22. https://doi.org/10.5281/zenodo.3464396.

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Indicators used in acid-base titration show well marked changes of colour in certain intervals of pH. Most of these indicators are organic dyes and are of synthetic origin. Today synthetic indicators are the choice of neutralization titrations. But due to environmental pollution, availability and cost, the search for natural compounds as an acid-base indicator was started. The present work highlights the use of the ethanolic extract of the corolla of Roselle (Hibiscus sabdariffa) as a pH indicator in strong acid-strong base, strong acid weak base, weak acid strong base and weak acid-weak base

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Sytnik, Natalia, Ekaterina Kunitsia, Viktoriia Kalyna, et al. "Technology development of fatty acids obtaining from soapstok using saponification." Eastern-European Journal of Enterprise Technologies 5, no. 6 (113) (2021): 16–23. http://dx.doi.org/10.15587/1729-4061.2021.241942.

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The processing of oil refining waste is essential from economic and environmental points of view. An important issue is the processing of soapstock to extract fatty acids, which are raw materials for various industries. The two-stage method of fatty acids obtaining from soapstock using saponification with sodium hydroxide solution and decomposition with sulfuric acid is investigated. The peculiarity of the work is the study of the influence of soapstock saponification conditions on the key efficiency indicators of fatty acid extraction: yield and neutralization number. A sample of soapstock wa

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Miss.Harshal, Chavan* Prutha Shirodkar A. S. Dhake Dr. A.G.Jadhav. "NATURAL INDICATORS AS ALTERNATIVE TO SYNTHETIC ACID BASE INDICATORS." Indo American Journal of Pharmaceutical Sciences 04, no. 11 (2017): 4078–82. https://doi.org/10.5281/zenodo.1048226.

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In acid-base titrations, indicators are used to show sharp color change at intervals of pH. Natural pigments in plants are highly colored substances and may show color change with variation of pH. An attempt has been made to investigate the indicator activity of flower pigments and to replace synthetic indicators as they have certain disadvantage like chemical pollution, availability problems and high cost. Alcoholic extract of Hibiscus rosasinensis, Calotropis gingantia, Brassica oleracea-capitata, Rosa chinensis, Brassica oleracea-italica, Ixora chinensis, Cantharanthus roseus gives sharp in

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Natalia, Sytnik, Kunitsia Ekaterina, Kalyna Viktoriia, et al. "Technology development of fatty acids obtaining from soapstok using saponification." Eastern-European Journal of Enterprise Technologies 5, no. 6 (113) (2021): 16–23. https://doi.org/10.15587/1729-4061.2021.241942.

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The processing of oil refining waste is essential from economic and environmental points of view. An important issue is the processing of soapstock to extract fatty acids, which are raw materials for various industries. The two-stage method of fatty acids obtaining from soapstock using saponification with sodium hydroxide solution and decomposition with sulfuric acid is investigated. The peculiarity of the work is the study of the influence of soapstock saponification conditions on the key efficiency indicators of fatty acid extraction: yield and neutralization number. A sample of soapsto

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Prashant, Thote. "GREEN CHEMISTRY: STUDY OF ACID-BASE INDICATOR PROPERTY OF GOLDEN BEET ROOT." International Journal of Research - GRANTHAALAYAH 3, no. 9 (Special Edition) (2017): 1–6. https://doi.org/10.5281/zenodo.851998.

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In acid- base titrations, indicators are used to show a sharp color changes at interval of pH.Natural pigments in plants are highly colored substances and may show color changes with variation of pH. An attempt has been made to investigate the indicator activity of root extract of golden beet root and to replace the synthetic indicators as they have certain disadvantages like chemical pollution, availability problems and high cost. A study has been done to investigate the indicator activity of aqueous extract of root pigments and compared with that of already existing synthetic indicators. Pig

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Book chapters on the topic "Neutralization indicators"

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Burgot, Jean-Louis. "Neutralization or Acid-Base Indicators." In Ionic Equilibria in Analytical Chemistry. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-8382-4_8.

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Blуznіuk, Оksana. "FORMATION OF A MODEL FOR MANAGEMENT BY FINANCIAL RISKS OF INVESTMENT ACTIVITY OF THE ENTERPRISES." In Modernisation of the Economy and Financial System: Problems, Opportunities, Prospects. Publishing House "Baltija Publishing", 2025. https://doi.org/10.30525/978-9934-26-540-2-3.

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The purpose of scientific research are substantiations and development of theoretic-methodical positions, working out of practical recommendations from management of financial risks of investment activity of the enterprise, improvement of methodical toolkit of an estimation of probability of occurrence and level of influence of financially-investment risks for the purpose of their neutralization and minimization at all stages of planning and realization of process of investment activity of subjects of managing. In the presented work the essence and preconditions of occurrence of financial risk

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Hryvkivska, Oksana, and Yevhen Heizha. "NEUTRALIZATION OF RISKS IN THE ECONOMIC ACTIVITIES OF AGRICULTURAL ENTERPRISES: CHALLENGES IN THE CONTEXT OF ACTIVE MILITARY OPERATIONS." In Anti-Crisis Strategy for the Development of Socio-Economic Systems: Global Challenges. Publishing House “Baltija Publishing”, 2024. https://doi.org/10.30525/978-9934-26-500-6-13.

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The methodological approaches to assessing the impact of risks on the performance of agricultural enterprises have been studied. The main risks of the economic activities of agricultural enterprises have been identified, and a description of each risk has been provided, along with the indicators that determine them. It has been proven that a quantitative assessment of the impact of risks on agricultural enterprises should be carried out using the taxonomy method, which is a multivariate analysis for comparing and ranking objects based on various indicators. An assessment of the impact of risks

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Lambourne, Jonathan, and Ruaridh Buchanan. "Immunotherapy." In Tutorial Topics in Infection for the Combined Infection Training Programme. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198801740.003.0057.

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Immunotherapy implies the use of an immune-based therapy to treat infection. Broadly speaking, these therapies can be divided into antibody-based therapies (both pathogen specific and pathogen agnostic), cellular therapies (e.g. CMV-specific T cells), and immune signalling therapies (e.g. interferon-alpha in the treatment of hepatitis C infection). While agents such as corticosteroids, thalidomide, and vitamin D have profound effects on immune function and a well-established role in the treatment of some infections (e.g. corticosteroids in tuberculous and pneumococcal meningitis), in this revi

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O. Omokpariola, Daniel, John K. Nduka, and Patrick L. Omokpariola. "pH Precursors as a Factor for Assessing Rainwater Quality in Roofing Sheets: A Case Study of Rivers State, Nigeria." In Rainfall - Observations and Modelling. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004027.

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Rainwater harvesting is vital for water management in water-scarce regions. This study in Rivers State, Nigeria, assesses rainwater quality from different roofing sheets, emphasizing critical pH precursors. Results show a pH range from 4.50 to 7.90, shifting toward alkalinity with increased rainfall. Temperature rises steadily, while conductivity, turbidity, total dissolved solids, and suspended solids decrease during the wet season. Anionic composition showed that Rumuodomaya/Rumuodome had a high level of 4.77 mg/L nitrate, 1.32 mg/L nitrite, and 1.15 mg/L phosphate, while Chokocho has a high

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Conference papers on the topic "Neutralization indicators"

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Hau, Jorge L., Omar Yépez, María Isabel Specht, and Robert Lorenzo. "The Iron Powder Test for Naphthenic Acid Corrosion Studies." In CORROSION 1999. NACE International, 1999. https://doi.org/10.5006/c1999-99379.

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Abstract In the course of an ongoing investigation into the phenomenon of naphthenic acid corrosion, a new test method has evolved and is currently being further developed to substitute the total acid number (TAN or neutralization number) as an indicator for naphthenic acid corrosion potential. It can also be used to complement conventional autoclave corrosion tests in high temperature environments, which are based on weight loss of steel coupons. In this new method an oil sample reacts with pure iron powder within an autoclave heated to the testing temperature. The result is based on the amou

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Yusupbekov, Nadirbek, and Elyor Samadov. "STUDY OF WATER TECHNOLOGICAL PARAMETERS INFLUENCE ON THE EFFICIENCY OF VEGETABLE OIL REFINING." In Status and development trends of standardization and technical regulation in the world. Tashkent state technical university, 2022. http://dx.doi.org/10.51346/tstu-conf.22.1-77-0079.

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Experimental methods have been used to study the effect of process water quality indicators on the efficiency of phospholipid hydration and neutralization of free fatty acids in the industrial refining of vegetable oils in order to create new emulsion products of improved quality.

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Taylor, C., and R. F. Baugh. "IN VITRO DEMONSTRATION OF "HEPARIN REBOUND"." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644184.

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"Heparin rebound", the in vivo appearance of measurable heparin anticoagulant activity following theapparent neutralization of heparin by protamine, hasbeen a problem sporadically associated with the use of heparin in cardiovascular surgery. A number of mechanisms have been proposed to explain rebound, and to some extent each may contribute to the phenomena. As yet no reliable, predictable method has been demonstrated for measuring, reproducing or quantifying "heparin rebound".We have demonstrated and measured the appearance of heparin anticoagulant activity following neutralization with prota

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Mikić, Miomir, Vesna Marjanović, Emina Požega, and Radmilo Rajković. "Treatment of acidic mine waters by the neutralization process." In Proceedings of XVI International Mineral Processing and Recycling Conference, Belgrade, 28-30.05.2025. University of Belgrade, Technical Faculty, Bor, 2024. https://doi.org/10.5937/imprc25416m.

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Mine water is one of the biggest challenges facing the global mining industry. This water is primarily produced by the oxidation of sulfide minerals when exposed to air, water, and microbial activity in active or abandoned mines containing polymetallic sulfide ores or coal mines. It is characterized by high acidity, with a pH value usually below 4, which usually indicates high concentrations of sulfates and dissolved metal ions. There are two different treatment strategies: removing toxic metals and reducing the acidity of mine water. Processes for neutralization of acid mine waters with lime

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Milanovic, Žiko, Ana Kesic, Edina Avdovic, Jelena Đorovic Jovanovic, and Dejan Milenkovic. "UTICAJ pH VREDNOSTI NA ANTIRADIKALSKI KAPACITET 4,7- DIHIDROKSIKUMARINA." In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.481m.

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The mechanisms of antiradical activity of 4,7-dihydroxycoumarin against peroxy (HOO•) radical were investigated. For this purpose were used sophisticated computational methods. Investigation was performed in the water, at different pH values (0-14). Acid-base species, which are represented in diverse molar fraction (f) at different pH values, contribute to a comprehensive examination of antiradical capacity. An overall rate constant (koverall) of the favorable reaction pathways (HAT and RAF) of 2.07×102 M-1s-1 at physiological pH indicates a moderate ability to neutralization HOO• radicals. A

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Reichmann, Felix, Stefan Millhoff, Yannick Jirmann, and Norbert Kockmann. "Seebeck Calorimeter for the Characterization of Highly Exothermic Reactions in a Microreactor Made From PVDF-Foils." In ASME 2017 15th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icnmm2017-5539.

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Reaction calorimetry is one of the most important steps in designing chemical reactors. This contribution describes a continuously operated micro calorimeter using Seebeck elements for microreactors made of PVDF-foils. Seebeck elements allow for local and temporal resolution of heat flux profiles. Various calibration methods for the Seebeck effect based heat flux sensors are presented. Here, the direct correlation between measured thermoelectric voltage and heat flux is found to be the most promising one. Commissioning of the calorimeter and validation of its performance are done by means of h

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Kirikov, Andrej, and Alexey Shelukhin. "Advanced pulse eddy current (PEC+) technology for automatic examination of steel plates for detection of hard spots." In DGZfP-Jahrestagung 2025, 26.– 28. Mai 2025 in Berlin. NDT.net, 2025. https://doi.org/10.58286/31222.

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Non-destructive inspection of steel plates for "hard spots" (HS) is a modern requirement imposed by most energy companies on steel plate manufacturers. The most suitable testing method involves the application of eddy current (EC) probes, specifically pulse eddy current (PEC) probes, which are generally sensitive to areas with abnormal hardness. However, a significant challenge in the industrial application of EC or PEC probes lies in the inevitable residual magnetization of plates and other rolled materials. Various other interfering factors, such as scale, variations in lift-off, and the "ed

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Fernandez, Jose Alejandro, Daniela Martinez, Franklin Salazar-Rodríguez, and Johnny Bullon. "Determination of the Concentration of Commercial Cationic Surfactants in Aqueous Solutions by the Colloidal Titration Method." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/kwwz9816.

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Cationic Surfactant's quantification in aqueous solution is relevant in fundamental and applied research, as well as for quality control in processes in the chemical industry. Colloidal titration is a commonly used method for surface charge determination in colloidal systems such as polyelectrolytes, macromolecules and solid particles, but it can also be applied for the detection of ionic surfactants in aqueous solution. It is a simple technique, easy to implement in a laboratory and its principle is based on the stoichiometric neutralization between two species of opposite charge, potassium p

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Day, H. J., R. Cherrey, D. O'Hara, and J. Carabello. "INCIDENCE OF PROCAINAMIDE-INDUCED LUPUS ANTICOAGULANT." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644241.

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Isolated cases of lupus anticoagulants (LA) in association with procainamide have been reported. This study was done to estimate the frequency of LA in patients taking procainamide. Two groups of patients were evaluated: Group A: 110 hospitalized patients (84 males, 26 females, ages 51-78, mean age 74.3) and Group B: 80 ambulatory patients (54 males, 26 females, ages 36-89, mean 67.5 years). The latter group of patients was on this drug for a period of two-five years, while the former group hadbeen on drug at least two full days. All patients were screened with baseline laboratory data includi

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Reports on the topic "Neutralization indicators"

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Hughes, James, Robert Emmott, Evan Raskin, Brian Witcher, and Wendy Wright. Protocol narrative: Long-term discrete water quality monitoring at Big South Fork National River and Recreation Area, Blue Ridge Parkway, and Obed Wild and Scenic River. National Park Service, 2018. https://doi.org/10.36967/2258269.

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Under the mandate of the National Parks Omnibus Management Act (1998), the National Park Service (NPS) developed a natural resources Inventory and Monitoring (I&M) program as part of a comprehensive effort to identify key natural resources within the National Park system and to provide long term monitoring of the integrity of those resources. The NPS has grouped parks into 32 I&M networks based on ecological similarity and geographic proximity. The Appalachian Highlands Inventory and Monitoring Network (APHN) includes four NPS units: Big South Fork National River and Recreation Area (B

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