Academic literature on the topic 'Acidity measurement'

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Journal articles on the topic "Acidity measurement"

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Srinivasan, T. G., and P. R. Vasudeva Rao. "Free acidity measurement – A review." Talanta 118 (January 2014): 162–71. http://dx.doi.org/10.1016/j.talanta.2013.10.017.

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Zhao, Ke, Hong Wei Si, and Yan Xiong. "The Research of Nondestructive Testing of Apple Acidity Based on Near Infrared Spectroscopy." Applied Mechanics and Materials 239-240 (December 2012): 243–46. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.243.

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the detection of the apple internal acidity using near infrared reflection spectroscopy is researched in this paper. This paper also elaborates the principle of partial least squares (PLS), and models spectral data by using the partial least squares method. Focuses on the comparison of the single points measurement and multiple points measurement in the Apple’s maximum diameter measurements, gets the following conclusions: a single point spectral scans can not accurately predict the internal acidity of the apple, the experimental precision of the multi-points measurement is higher then the sin
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Tutuian, R., D. O. Castell, S. Xue, and P. O. Katz. "The acidity index: a simple approach to the measurement of gastric acidity." Alimentary Pharmacology & Therapeutics 19, no. 4 (2004): 443–48. http://dx.doi.org/10.1111/j.1365-2036.2004.01853.x.

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Srinivasan, T. G., and P. R. Vasudeva Rao. "ChemInform Abstract: Free Acidity Measurement - A Review." ChemInform 45, no. 9 (2014): no. http://dx.doi.org/10.1002/chin.201409225.

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Buttersack, C., H. Widdecke, and J. Klein. "Measurement of acidity of polymeric solid acids." Journal of Molecular Catalysis 35, no. 1 (1986): 77–96. http://dx.doi.org/10.1016/0304-5102(86)85059-3.

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Thompson, S. C., and J. F. Mathews. "Characterization of hydro-cracking catalysts by acidity measurement." Applied Catalysis 47, no. 1 (1989): 45–57. http://dx.doi.org/10.1016/s0166-9834(00)83261-3.

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Deeba, Michel, and W. Keith Hall. "The Measurement of Catalyst Acidity II: Chemisorption Studies." Zeitschrift für Physikalische Chemie 144, no. 144 (1985): 85–103. http://dx.doi.org/10.1524/zpch.1985.144.144.085.

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Keeffe, J. R., A. J. Kresge, and J. Toullec. "Acid-catalyzed enolization of acetophenone: catalysis by bisulfate ion in sulfuric acid solutions." Canadian Journal of Chemistry 64, no. 6 (1986): 1224–27. http://dx.doi.org/10.1139/v86-203.

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Rates of acid-catalyzed enolization of acetophenone in dilute aqueous solution, measured under conditions where the solvated proton is the only acidic species present, give a hydrogen ion catalytic coefficient, [Formula: see text], that is 35% smaller than the value obtained by X acidity function extrapolation of measurements made in moderately concentrated sulfuric acid solutions. The difference may be attributed to catalysis by bisulfate ion in the sulfuric acid solutions; this is supported by direct measurement of the bisulfate ion catalytic coefficient in dilute sulfuric acid. This revised
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HUANG, M., and V. G. PAPANGELAKIS. "ONLINE FREE ACIDITY MEASUREMENT OF SOLUTIONS CONTAINING BASE METALS." Canadian Metallurgical Quarterly 47, no. 3 (2008): 269–76. http://dx.doi.org/10.1179/cmq.2008.47.3.269.

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SATO, Hiroshi, Kennichi HIROSE, and Masaru KITAMUR. "Acidity measurement and IR spectroscopy of ZSM-5 zeolite." NIPPON KAGAKU KAISHI, no. 9 (1989): 1550–57. http://dx.doi.org/10.1246/nikkashi.1989.1550.

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Dissertations / Theses on the topic "Acidity measurement"

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Pasteris, Daniel R. "A continuous method for measurement of pH and acidity in ice cores." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1464455.

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Neri, Quiroz José Antonio. "Développement d’un lab-on-chip pour la mesure d’acidité libre de solutions chargées en cations hydrolysables." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1247/document.

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Une étude conjointe du CEA et d'AREVA la Hague a montré qu'une des voies d'amélioration majeure des usines de traitement/recyclage du combustible nucléaire usagé, actuelles et futures, concerné le domaine de l'analyse. En effet, le suivi et le pilotage des procédés déployés dans ces usines nécessitent de nombreuses analyses générant de grandes quantités d'effluents radioactifs. Réduire les volumes mis en jeu lors de ces analyses permettrait donc de réduire la nocivité des échantillons et des effluents et donc d'accroitre la sureté pour le personnel et de réduire l'impact sur l'environnement et
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Chanton, Patrick. "Calibration of phenol oxidase measurement in acidic wetland environments." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52329.

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Phenol oxidases mediate the degradation of recalcitrant compounds, polyphenolics, in wetland soils and are considered to play a key role in the microbial carbon cycle of peatlands which predominate in boreal biomes. In order to validate a method for quantification of oxidative enzyme activity in acidic wetland environments, the relationship between pH and substrate oxidation was studied using the standard enzyme tyrosinase and in soils collected from six freshwater wetlands including three marshes in north Florida and peatlands of northern Minnesota. Phenol oxidase (PO) activity was quantified
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Buniazet, Zoé. "Vers une meilleure connaissance des propriétés acides des catalyseurs hétérogènes en présence d’eau : application à la déshydratation d’alcools biosourcés en oléfines." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1217.

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La valorisation de la biomasse en molécules plateformes, telles que les oléfines pour l'industrie des polymères, rend nécessaire l'adaptation des catalyseurs utilisés en pétrochimie à la transformation de composés fortement hydratés. Ces travaux de thèse ont permis de développer une méthode de caractérisation complète des catalyseurs acides en présence d'eau et en conditions réactionnelles. Cette méthode combine un examen des propriétés catalytiques en étudiant l'effet de l'eau sur des paramètres tels que le temps de contact, la température ou le vieillissement du catalyseur, mais aussi des pr
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Chappaz, Alban. "Développement de nouveaux milieux et catalyseurs acides pour la transformation de biomasse lignocellulosique en molécules plateformes." Thesis, Lyon, École normale supérieure, 2014. http://www.theses.fr/2014ENSL0936.

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L'objectif de la thèse est d'étudier la transformation de la fraction cellulosique de la biomasse en acide lévulinique. Cet acide est une molécule plateforme permettant un accès à de multiples produits, tels que des solvants, des monomères ou encore des molécules à plus forte valeur ajoutée.Nous proposons d'étudier la transformation de la cellulose en acide lévulinique catalysée par des solutions aqueuses concentrées en acides de Brønsted. La forte acidité de ces milieux et leur capacité à rompre les liaisons hydrogène de la cellulose rendent possible des réactions à température modérée (80°C)
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Andriamadio, Pascal. "Amino-2 thiophènes et dérivés : Constantes d'acidité et mesures de rotations empêchées en milieux non aqueux." Nancy 1, 1986. http://www.theses.fr/1986NAN10957.

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Les amino-2 thiophènes diversement substitués en position 5 sont insolubles dans l'eau et la première partie de ce travail a consisté à rechercher des solvants aprotiques suffisamment dissociants pour permettre la mesure du pH au moyen d'indicateurs colorés. Des relations de BRONSTED satisfaisantes ont été obtenues respectivement dans l'acétonitrile et dans le DMSO. Dans la deuxième partie, l'étude par RMN des autres dérivés R5 = H, CI, COCH3, CHO et NO2 a permis de montrer que le rapport de population entre les deux isomères X et Y s'inverse par passage de NO2 à H (PX/PY = 0. 074 et 9,65 dans
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Li, Tingting. "Acidity and proton affinity measurement of cytosine by multiple methods in the gas phase." 2007. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.16617.

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Lii, Lai-Jiu, and 李來居. "Measurement of Water-soluble Acidity at Single Level in Rice : Method Development and Application." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/30754377338459821822.

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碩士<br>國立臺灣大學<br>農藝學系研究所<br>86<br>Rice quality in general changes along with the storage. Many physical chemical characteristics have been used indexes to express the rice quality during storage. In Taiwan, there are two crops each year, and the grains produced from the two crops are frequently stored at the same period. Thus, a more efficient method is needed to monitor the changes of grain quality during storage at the complex situation. The objective of the present researc
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Gregoire, Phillip. "Implications of Ambient Ammonia on Aerosol Acidity and Reactive Nitrogen Measurements." Thesis, 2013. http://hdl.handle.net/1807/42851.

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This study describes two projects involving recent research on atmospheric ammonia. The first project investigates differences in modelling techniques of aerosol acidity using data from two recent field campaigns. Our results show that allowing or disallowing gas-particle partitioning in the Extended Aerosol Inorganic Model (E-AIM) changed the average modelled aerosol activity of H+ from one campaign by seven orders of magnitude and that disallowing gas-particle partitioning may not accurately represent the chemical state of the aerosols. The second project investigates the interference of r
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Gravador, Rufielyn Sungcaya. "Determination of temperature effecton the measurements of pKa of some weak acids and weak bases using capillary zone electrophoresis." Master's thesis, 2010. http://hdl.handle.net/10400.1/10748.

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This study was done to determine the pKa values of a number of weak acidic and basic compounds at different temperatures and to be able to identify the effects of temperature variations in the measured pKa using capillary zone electrophoresis. The method employed was adopted from Fuguet et al [12] in which internal standard is used. Running buffers of different pH were prepared. The maximum voltage was chosen based from Ohm’s law to reduce the Joule heating effects. Considering the linearity in the relationship between voltage and current to be with an r2≥0.999, the maximum voltage was found t
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Books on the topic "Acidity measurement"

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Chafin, Daniel T. Evaluation of trends in pH in the Yampa River, northwestern Colorado, 1950-2000. U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

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Chafin, Daniel T. Evaluation of trends in pH in the Yampa River, northwestern Colorado, 1950-2000. U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

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Ott, Arthur N. Estimating iron and aluminum content of acid mine discharge from a north-central Pennsylvania coal field by use of acidity titration curves. U.S. Dept. of the Interior, U.S. Geological Survey, 1986.

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Ott, Arthur N. Estimating iron and aluminum content of acid mine discharge from a north-central Pennsylvania coal field by use of acidity titration curves. U.S. Dept. of the Interior, U.S. Geological Survey, 1986.

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Ott, Arthur N. Estimating iron and aluminum content of acid mine discharge from a north-central Pennsylvania coal field by use of acidity titration curves. U.S. Dept. of the Interior, U.S. Geological Survey, 1986.

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Riggins, Carey. The effects of alkalinity on the strength of freshwater mussel shells (Margaritifera falcata) and the effects of shell erosion on the distribution of M. falcata in Mission Creek and Steele Creek. Huxley College of Environmental Studies, Western Washington University, 1997.

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Envirotest. Methods for acidic deposition measurements. s.n, 1986.

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L, Papp M., Van Remortel R. D, United States. Environmental Protection Agency. Office of Research and Development, Lockheed Engineering & Sciences Company, and NSI Technology Services, eds. Direct/delayed response project: Laboratory operations and quality assurance report for preparation of soils from the Mid-Appalachian Region of the United States. U.S. Environmental Protection Agency, Office of Research and Development, 1990.

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Survey design for assessing the sensitivity of lakes to acidic deposition: Report. Environment Ontario, 1990.

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J, Scholer P., and Ontario. Ministry of the Environment., eds. Survey design for assessing the sensitivity of lakes to acidic deposition: Report. Environment Ontario, 1990.

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Book chapters on the topic "Acidity measurement"

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Darlenski, Razvigor, and Joachim W. Fluhr. "Measurement of Skin Surface Acidity." In Agache's Measuring the Skin. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-32383-1_12.

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Agache, Pierre. "Measurement of Skin Surface Acidity." In Measuring the skin. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08585-1_9.

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Craig, R. L., and A. P. Ault. "Aerosol Acidity: Direct Measurement from a Spectroscopic Method." In ACS Symposium Series. American Chemical Society, 2018. http://dx.doi.org/10.1021/bk-2018-1299.ch009.

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Carniti, Paolo, and Antonella Gervasini. "Liquid-Solid Adsorption Properties: Measurement of the Effective Surface Acidity of Solid Catalysts." In Calorimetry and Thermal Methods in Catalysis. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-11954-5_17.

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Bertram, Henry L., Nirmal C. Das, and Yan K. Lau. "Precipitation Chemistry Measurement in Alberta." In Acidic Precipitation. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_23.

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Dasch, Jean Muhlbaier. "Measurement of Dry Deposition to Vegetative Surfaces." In Acidic Precipitation. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_20.

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Borchert, Horst. "Preliminary Results and Experiences with a New In-Situ Measurement System of Rainfall Acidity in Forest Areas of Rheinland-Pfalz / Federal Republic of Germany." In Atmospheric Pollutants in Forest Areas. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4736-8_14.

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Johannes, A. H., Y. L. Chen, K. Dackson, and T. Suleski. "Modeling of Throughfall Chemistry and Indirect Measurement of Dry Deposition." In Acidic Precipitation. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_21.

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Schiff, H. I., G. I. Mackay, C. Castledine, G. W. Harris, and Q. Tran. "Atmospheric Measurements of Nitrogen Dioxide with a Sensitive Luminol Instrument." In Acidic Precipitation. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_9.

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Anlauf, K. G., J. W. Bottenheim, K. A. Brice, and H. A. Wiebe. "A Comparison of Summer and Winter Measurements of Atmospheric Nitrogen and Sulphur Compounds." In Acidic Precipitation. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_14.

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Conference papers on the topic "Acidity measurement"

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He, Yong, Shuijuan Feng, Di Wu, and Xiaoli Li. "Study of Vis/NIR spectroscopy measurement on acidity of yogurt." In Fourth International Conference on Photonics and Imaging in Biology and Medicine, edited by Kexin Xu, Qingming Luo, Da Xing, Alexander V. Priezzhev, and Valery V. Tuchin. SPIE, 2006. http://dx.doi.org/10.1117/12.710919.

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Li, Xiaoli, and Yong He. "Nondestructive measurement of acidity of Chinese bayberry using Vis/NIR spectroscopy techniques." In Fourth International Conference on Photonics and Imaging in Biology and Medicine, edited by Kexin Xu, Qingming Luo, Da Xing, Alexander V. Priezzhev, and Valery V. Tuchin. SPIE, 2006. http://dx.doi.org/10.1117/12.710950.

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Shao, Yongni, and Yong He. "Nondestructive Measurement of the Acidity of Strawberry Based on Wavelet Transform and Partial Least Squares." In 2007 IEEE Instrumentation & Measurement Technology Conference IMTC 2007. IEEE, 2007. http://dx.doi.org/10.1109/imtc.2007.379466.

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Nickson, Ian D., Colin Boxall, Angela Jackson, and Guy O. H. Whillock. "The Development of a Method for the Simultaneous Measurement of Cerium (IV) and Chromium (VI) Species in Nitric Acid Media." In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16124.

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The corrosion of stainless steel in nitric acid media is a major concern for the nuclear industry. Several reprocessing schemes such as PUREX (Plutonium Uranium Reduction Extraction) and UREX (Uranium Reduction Extraction) utilise nitric acid media, and an understanding of the behaviour of key chemical species in these process streams is vital if their effect on associated corrosion reactions and their rates is to be accurately assessed and quantified. This will allow for more accurate prediction of the working lifetime of any stainless steel surface in contact with the process stream in quest
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Carvalho, Fernando P., Joa˜o M. Oliveira, and Lube´lia M. Torres. "Environmental Radioactivity Assessment Around Old Uranium Mining Sites Near Mangualde (Viseu), Portugal." In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7366.

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Uranium ore was extracted in the surroundings of Mangualde city, North of Portugal, in the mines of Cunha Baixa, Quinta do Bispo and Espinho until a few years ago. Mining waste, milling tailings and acid mine waters are the on site remains of this extractive activity. Environmental radioactivity measurements were performed in and around these sites in order to assess the dispersal of radionuclides from uranium mining waste and the spread of acidic waters resulting from the in situ uranium leaching with sulphuric acid. Results show migration of acid waters into groundwater around the Cunha Baix
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Helmy, Samy A., Judith K. Guy-Caffey, Leroy J. Detiveaux, Sabine C. Zeilinger, Mike D. Barry, and Cliff Aaron Corbell. "The Successful Development, Validation, and First Use of an Innovative Zinc-Free, High-Density Completion Fluid for Deepwater." In SPE/IADC International Drilling Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204095-ms.

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Abstract The completion of wells using solids-laden fluids can impair the reservoir production and also damage the functioning of downhole completion tools, therefore completing wells with clear-brine fluids is the preferred alternative. Clear brines are typically halide or formate salt solutions in water, but they, too, have shortcomings. At lower temperatures or increased pressures, the salts in these fluids can crystallize causing potential well control concerns and/or costly operational disruptions. Completion of high-pressure wells, with densities above approximately 14.3 lb/gal for calci
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Kaczorowski, D., P. Combrade, J. Ph Vernot, and A. Beaudouin. "Tribocorrosion in PWR: A Parametric Approach." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89013.

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A specific tribometer equipped for electrochemical measurements in pressurized high temperature water (PHTW) is being used to study the effect of the water chemistry on the wear rate of a stainless steel. First results indicate that a slightly acidic pH increases drastically the wear rate compared to slightly alkaline pH. The influence of hydrogen partial pressure and contact kinematics is also described.
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Olabode, Abiola, and Mileva Radonjic. "Nano-Scale Characterisation of Shale Caprock/Acidic Brine Interaction." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-11190.

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Shale-caprock integrity is critical in ensuring that subsurface injection and storage of anthropogenic carbon dioxide (CO2) is permanent. The interaction of clay-rich rock with aqueous CO2 under dynamic conditions requires characterization at the nano-scale due to the low-reactivity of clay minerals. Geochemical mineral-fluid interaction can impact properties of shale rocks primarily through changes in pore geometry/connectivity. Several simulation results had predicted that influx-triggered mineral dissolution/precipitation reactions within clay-rich rock can continuously diminish micro-fract
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Moulton, Tyler M., Emily C. Zaloga, Katherine M. Chase, and Jürgen M. Lobert. "An analytical method for the measurement of trace level acidic and basic AMC using liquid-free sample traps." In SPIE Advanced Lithography, edited by Jason P. Cain and Martha I. Sanchez. SPIE, 2014. http://dx.doi.org/10.1117/12.2046190.

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Kühne, Jonathan, Frederic Güth, Heike Strauß, Yvonne Joseph, and Pál Árki. "pH-Sensor Under Consideration for Multi-Sensor-Chip in Downhole Drilling Fluid Monitoring." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62544.

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Modern drill strings for the exploration of oil and gas are equipped with a variety of sensor carrying devices such as Measurement While Drilling (MWD), Logging While Drilling (LWD), and Formation Testing While Drilling (FTWD). These devices generate a large amount of downhole data, such as the orientation of the well, drilling parameters e.g. weight on bit and torque, and formation properties. Appropriate telemetry systems are included in the drill string to transfer relevant downhole data in real time to the surface. Other data is stored in memories downhole for subsequent evaluation. Howeve
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Reports on the topic "Acidity measurement"

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Kuhn, K. J., and J. T. Dyke. Measurement of high acidity using a renewable-reagent fiber optic sensor. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/10116784.

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