Academic literature on the topic 'PH'

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Journal articles on the topic "PH"

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Machihara, Fumiaki. "FIRST PASSAGE TIMES OF PH/PH/1/K AND PH/PH/1 QUEUES." Journal of the Operations Research Society of Japan 30, no. 1 (1987): 1–26. http://dx.doi.org/10.15807/jorsj.30.1.

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Wang, Liping, Jie Ren, Xiaoyan Zhang, Xiaoci Yang, and Wu Yang. "Synthesis and Characterization of pH-sensitive and Self-oscillating IPN Hydrogel in a pH Oscillator." Polymer Korea 39, no. 3 (May 25, 2015): 359–64. http://dx.doi.org/10.7317/pk.2015.39.3.359.

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Corinaldi, Michelle. "Motherhood in the Workplace: A Sociological Exploration into the Negative Performance Standards and Evaluations of Full-Time Working Mothers." Philologia 11, no. 1 (April 30, 2019): 13. http://dx.doi.org/10.21061/ph.172.

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Hubbard, Zachary. "Paintings in the Year Without a Summer." Philologia 11, no. 1 (April 30, 2019): 17. http://dx.doi.org/10.21061/ph.173.

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Kim, Joshua. "Toni Morrison’s Experimental Novel, The Bluest Eye: Tempering ‘Disinterested Violence’ Through the ‘Narrative Project’." Philologia 11, no. 1 (April 30, 2019): 43. http://dx.doi.org/10.21061/ph.175.

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Hart, Madelyn. "The Importance of Universal Design on College Campuses." Philologia 11, no. 1 (April 30, 2019): 7. http://dx.doi.org/10.21061/ph.176.

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Goodison, Kyran. "Russia in the Central African Republic: Exploitation Under the Guise of Intervention." Philologia 11, no. 1 (April 30, 2019): 34. http://dx.doi.org/10.21061/ph.177.

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Board, Editorial. "Acknowledgments." Philologia 11, no. 1 (April 30, 2019): 1. http://dx.doi.org/10.21061/ph.178.

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Bush, Taylor, and Abbigale Evans. "Featured Poem." Philologia 11, no. 1 (April 30, 2019): 4. http://dx.doi.org/10.21061/ph.179.

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Keenan, Nicole. "Theories of Violence." Philologia 12, no. 1 (April 20, 2020): 1. http://dx.doi.org/10.21061/ph.222.

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Dissertations / Theses on the topic "PH"

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Chinnam, Krishna Chytanya. "Capacitive pH-Sensors using pH sensitive polymer." Thesis, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-16279.

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<p><p>This project aims in building a new experimental setup for capacitive measurements of a pH-Sensor. PAA-IOA (Poly Acrylic Acid co – Iso Octyl Acrylate) is the dielectric material over the in-plane interdigitated gold electrodes where PAA IOA acts as an H<sup>+</sup> ion sensing layer. The changes in the capacitance of the sensor when the sensor is dipped into different pH solutions will be quantized accordingly. The dipping setup is built in such a way that the electrodes (containing the polymer layer) can be easily dipped into different pH liquids and to eliminate any contact between the polymer and set-up (e.g. pressure effects on the sensor). From the setup it is visible that the gold electrodes are not subjected to any external force as in the case of the setup used previously. Three phases of experiments have been used in this project to get a clear view on the working principle of the polymer. The effect of pH is only considered in this project, as we already have the evidences for the salt sensitiveness of PAA IOA from the work done in the past. The influence of various pH on polymer is observed as capacitance measurements. Response time is more than 5 minutes for PAA IOA. ∆C decreases with frequency and frequency choice depends on application/electronics. The degree of other ions influence is not clear but they have a minor influence in the resistance.</p></p>
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Backhus, Ralf. "Hygienestatus frisch erlegter Fasanen (Phasianus colchicus, Ph. torquatus, Ph. mongolicus, Ph. versicolor) aus verschiedenen Revieren in Deutschland /." Hannover : [s.n.], 2000. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009476449&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Rueda, Javier Eduardo. "The Ph(t)/Ph(t)/s/c Queueing Model and Approximation." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9637.

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Time-dependent queueing models are important since most of real-life problems are time-dependent. We develop a numerical approximation algorithm for the mean, variance and higher-order moments of the number of entities in the system at time t for the Ph(t)/Ph(t)/s/c queueing model. This model can be thought as a reparameterization to the G(t)/GI(t)/s. Our approach is to partition the state space into known and identifiable structures, such as the M(t)/M(t)/s/c or M(t)/M(t)/1 queueing models. We then use the Polya-Eggenberger distribution to approximate certain unknown probabilities via a two-moment matching algorithm. We describe the necessary steps to validate the approximation and measure the accuracy of the model.<br>Master of Science
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Kulkarni, Aditya Umesh. "Approximating Deterministic Changes to Ph(t)/Ph(t)/1/c and Ph(t)/M(t)/s/c Queueing Models." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/33460.

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A deterministic change to a time-varying queueing model is described as either changing the number of entities, the queue capacity, or the number of servers in the system at selected times. We use a surrogate distribution for N(t), the number of entities in the system at time t, to approximate deterministic changes to the Ph(t)/Ph(t)/1/c and the Ph(t)/M(t)/s/c queueing models. We develop a solution technique to minimize the number of state probabilities to be approximated.<br>Master of Science
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Rivinoja, A. (Antti). "Golgi pH and glycosylation." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514292699.

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Abstract Glycans, as a part of glycoproteins, glycolipids and other glycoconjugates, are involved in many vital intra- and inter-cellular tasks, such as protein folding and sorting, protein quality control, vesicular trafficking, cell signalling, immunological defence, cell motility and adhesion. Therefore, their correct construction is crucial for the normal functioning of eukaryotic cells and organisms they form. Most cellular glycans are constructed in the Golgi, and abnormalities in their structure may derive, for instance, from alkalinization of the Golgi lumen. In this work we show that Golgi pH is generally higher and more variable in abnormally glycosylating, i.e. strongly T-antigen (Gal-β1,3-GalNAc-ser/thr) expressing cancer cells, than in non-T-antigen expressing cells. We also confirmed that the Golgi pH alterations detected in cancer cells have the potential to induce glycosylation changes. A mere 0.2 pH unit increase in Golgi pH is able to induce T-antigen expression and inhibit terminal N-glycosylation in normally glycosylating cells. The mechanism of inhibition involves mislocalization of the corresponding glycosyltransferases. We also studied potential factors that can promote Golgi pH misregulation in health and disease, and found that cultured cancer cells, despite variation and elevation in Golgi pH, are fully capable of acidifying the Golgi lumen under the normal Golgi pH. Moreover, we introduce a Golgi localized Cl-/HCO3- exchanger, AE2a, that participates in Golgi pH regulation by altering luminal bicarbonate concentration and thus also buffering capacity. Participation of AE2a in Golgi pH regulation is especially intriguing, because it also provides a novel mechanism for expelling protons from the Golgi lumen.
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Shin, John J. H. "Lipids as pH biosensors." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45704.

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Ighoroje, Ahbor Dolly Awani. "pH and vascular tone." Thesis, University of Glasgow, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293493.

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Marshall, Alexander James. "pH-sensitive holographic sensors." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615895.

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Barman, Dipti Narayan. "pH sensitive fluorescent sensors." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4972.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 3, 2009) Includes bibliographical references.
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Shave, Evan Eric. "pH-biased isoelectric trapping separations." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/4184.

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The classical isoelectric trapping (IET) technique, using the multicompartment electrolyzer (MCE), has been one of the most successful electrophoretic techniques in preparative-scale protein separations. IET is capable of achieving high resolution discrimination of proteins, by isolating proteins in between buffering membranes, in their isoelectric state. However, due to the inherent nature of the IET process, IET has suffered several shortcomings which have limited its applicability. During a classical IET separation, a protein gets closer and closer to its pI value, thus the charge of the protein gets closer and closer to zero. This increases the likelihood of protein precipitation and decreases the electrophoretic velocity of the protein, thus making the separation very long. Furthermore, the problems are aggravated by the fact that the instrumentation currently used for IET is not designed to maximize the efficiency of electrophoretic separations. To address these problems, a new approach to IET has been developed, pH-biased IET. By controlling the solution pH throughout the separation, such that it is not the same as the protein’s pI values, the problems of reduced solubility and low electrophoretic migration velocity are alleviated. The pH control comes from a novel use of isoelectric buffers (also called auxiliary isoelectric agents or pH-biasers). The isoelectric buffers are added to the sample solution during IET and are chosen so that they maintain the pH at a value that is different from the pI value of the proteins of interest. Two new pieces of IET instrumentation have been developed, resulting in major improvements in protein separation rates and energy efficiency. A variety of separations, of both small molecules and proteins, have been successfully performed using the pH-biased IET principle together with the new instrumentation.
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Books on the topic "PH"

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Henningsen, Poul. PH. Edited by Jørstian Tina, Nielsen Poul Erik Munk, and Danske kunstindustrimuseum. København: Louis Poulsen & Co., 1994.

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Bruyère, Gérard. Fragile mémoire: Catalogue illustré des clichés sur verres, sous-séries 3 Ph, 10 Ph, 15 Ph, 38 Ph. Lyon: Les Archives, 1997.

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1818-1892, Hostrup C. (Christian), Bjarnhof Karl, Christensen Bernhard 1906-2004, Find Mikkel, Kjær Torben, Kristensen Sven Møller 1909-, Normann Andersen Kai, et al., eds. PH--77 viser. 2nd ed. [Frederiksberg]: Thaning & Appel, 2009.

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Hertel, Hans Christian. PH--en biografi. København]: Gyldendal, 2012.

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1950-, Arsovska Ljubica, and Reid Peggy 1939-, eds. pH neutral history. Port Townsend, Wash: Copper Canyon Press, 2012.

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1946-, McMillan Gregory K., ed. pH measurement and control. 2nd ed. Research Triangle Park, NC: Instrument Society of America, 1993.

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Fontanarosa, Phil B., and Stacy Christiansen. pH. Oxford University Press, 2009. http://dx.doi.org/10.1093/jama/9780195176339.022.566.

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Molter, Carey. Ph. ABDO Publishing Company, 2001.

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Ph. Edina, Minn: Abdo Pub. Co., 2001.

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Book chapters on the topic "PH"

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Kobayashi, Kensei. "pH." In Encyclopedia of Astrobiology, 1222–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_1176.

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Webb, Nadia, and John C. Courtney. "pH." In Encyclopedia of Clinical Neuropsychology, 1930–31. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-0-387-79948-3_1745.

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Hasan, Ashfaq. "pH." In Handbook of Blood Gas/Acid-Base Interpretation, 143–63. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4315-4_5.

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Webb, Nadia, and John C. Courtney. "pH." In Encyclopedia of Clinical Neuropsychology, 1–2. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56782-2_1745-2.

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Webb, Nadia, and John C. Courtney. "pH." In Encyclopedia of Clinical Neuropsychology, 2668–69. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-57111-9_1745.

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Kobayashi, Kensei. "pH." In Encyclopedia of Astrobiology, 1849. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_1176.

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Gooch, Jan W. "pH." In Encyclopedic Dictionary of Polymers, 529. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_8622.

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Elgamal, Ayman A. "pH." In Encyclopedia of Estuaries, 480–81. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-8801-4_159.

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Kobayashi, Kensei. "pH." In Encyclopedia of Astrobiology, 2265. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65093-6_1176.

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Gooch, Jan W. "pH." In Encyclopedic Dictionary of Polymers, 914. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_14467.

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Conference papers on the topic "PH"

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Sharma, Dia G. "DIY pH Indicator." In 2024 IEEE Integrated STEM Education Conference (ISEC), 1. IEEE, 2024. http://dx.doi.org/10.1109/isec61299.2024.10664771.

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Garber, James D., Vamshidhar R. Jangama, and Jeffery Willmon. "Parameters Affecting Downhole pH." In CORROSION 1997, 1–28. NACE International, 1997. https://doi.org/10.5006/c1997-97606.

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Abstract The presence of acetic and formic acids in the produced water of gas condensate wells has been known for some time by the industry. In traditional water analysis, it has been titrated and reported as alkalinity. The calculation of accurate downhole pH values requires that these ions be analyzed separately in the water and that an organic acid material balance be performed on all three phases in the separator. In this manner, it is then possible to use phase distribution coefficients involving ionic equilibrium to determine how these acids distribute themselves between phases as the pH calculation proceeds downhole. In this paper, the above method of calculation of pH and ΔpH is used to examine the effect that various concentrations of these acids have on the downhole pH. Various concentrations of acids are examined, and two cases are calculated in which the effect of condensate on the pH is examined.
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Jack, T. R., B. Erno, K. Krist, and R. R. Fessler. "Generation of near Neutral pH and High pH SCC Environments on Buried Pipelines." In CORROSION 2000, 1–11. NACE International, 2000. https://doi.org/10.5006/c2000-00362.

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Abstract External stress corrosion cracking is a significant threat to the integrity of operating pipeline systems. Both intergranular and transgranular cracking are seen but these modes of failure are identified with different environmental conditions. Understanding how these conditions arise can improve site selection and risk based management approaches to integrity maintenance. This paper reviews the different electrolytes associated with both high pH and near neutral pH SCC in the field and discusses processes responsible for creation of solutions amenable to the potential cracking of line pipe steel under disbonded coatings.
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Olsen, Stein, and Anne Marie Koren Halvorsen. "Corrosion Control by pH Stabilization." In CORROSION 2015, 1–15. NACE International, 2015. https://doi.org/10.5006/c2015-05733.

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Abstract The pH stabilization technique is a method for control of sweet corrosion in wet gas pipelines. The method is suited for systems with MEG for hydrate control as the pH stabilizer will remain in the lean MEG and do not need a continuous injection. Full pH stabilization is used when the risk for production of formation water is negligible as formation water will lead to calcium carbonate scaling. Partial pH stabilization combined with a film forming inhibitor may be an alternative when some formation water may be produced. This method has also been applied without MEG. The biggest challenge with pH stabilization is the risk for scaling, and a reliable prediction of expected quantities of formation water is required. The design is normally more complex than traditional systems and the interaction with the MEG regeneration is essential. Organic acids will accumulate over time and may lead to top-of-line corrosion. Qualification in the laboratory in flow loops is highly recommended for both full and partial pH stabilization to identify type and concentrations of chemicals and to determine the required corrosion allowance. For full pH stabilization a back-up solution should be qualified in parallel with the base case. There are several fields currently under operation with use of both techniques with no reported corrosion problems. Follow-up during operation should be by regular chemical analyses of the rich MEG to determine the need for reclaiming and to verify that sufficient pH stabilizer is present. The iron ion concentration for such systems should normally be very low.
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Ayello, Francois, Guanlan Liu, Narasi Sridhar, and Ramgopal Thodla. "Combination of High pH SCC and Near-Neutral pH SCC Models Using Bayesian Networks." In CONFERENCE 2022, 1–15. AMPP, 2022. https://doi.org/10.5006/c2022-17851.

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ABSTRACT Stress corrosion cracking (SCC) continues to be a safety concern, mainly because it may remain undetected before a major pipeline failure occurs. SCC processes involve complex interactions between metallurgy, stresses, and the electrolyte chemistry beneath the disbonded coating. For these reasons, assessing SCC failure probability at any given location on a pipeline is difficult. In addition, data uncertainties make the prediction of SCC even more challenging. The complex interactions of various seemingly unrelated parameters and varying mechanisms has been addressed using Bayesian network models. Two Bayesian network models have been created to predict both high pH and near neutral pH crack growth rates. This publication presents a new SCC model that combine the previous high pH and near-neutral pH SCC models.
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Payer, J. H., K. Fink, and I. Song. "Metal-Metal Oxide pH Sensor: the Effect of Anions and Aeration on pH Measurements." In CORROSION 1997, 1–14. NACE International, 1997. https://doi.org/10.5006/c1997-97308.

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Abstract This work examines the electrochemical growth of iridium oxide electrodes for use as a pH sensor and further evaluates the usefulness of these probes in a variety of solutions with sulfur-containing anions. Electrodes were grown and calibrated according to reports in the literature and exposed to sulfate-, sulfite-, bisulfite-, and thiosulfate- containing solutions in various concentrations. No effect of changes in sulfate and sulfite ion concentration were observed, however, significant changes in the calibration behavior of the electrodes was observed after the exposure to the solutions with bisulfite and thiosulfate ions.
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Garber, James D., Richard S. Perkins, Vamshidhar R. Jangama, and Rama R. Alapati. "Calculation of Downhole pH and Delta pH in the Presence of CO2 and Organic Acids." In CORROSION 1996, 1–25. NACE International, 1996. https://doi.org/10.5006/c1996-96176.

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Abstract Acetic and formic acids have been found in the separator water of gas condensate wells containing CO2 and they are titrated as alkalinity. Traditional pH equations which neglect these acids and calculate pH based on alkalinity greatly over-predict the downhole pH. Since all scale calculations depend on an accurate pH value, a more sophisticated method of calculation has been developed. The methodology can be used to calculate the in-situ bulk pH and the saturation pH at different depths within a well. The difference in the saturation pH and the bulk pH is the delta pH, a negative delta pH indicates a potential to scale whereas a positive value indicates a potential to corrode. The saturation pH is discussed with respect to iron carbonate saturation, but can be used for any other scale by making the appropriate changes.
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Brandwajn, Alexandre, and Thomas Begin. "An approximate solution for Ph/Ph/1 and Ph/Ph/1/N queues." In the third joint WOSP/SIPEW international conference. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2188286.2188297.

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Zhang, Sifu, Peter J. Rolfe, and Yappa A. Wickramasinghe. "Optical pH sensor for physiological pH measurement." In Europto Biomedical Optics '93, edited by Otto S. Wolfbeis. SPIE, 1994. http://dx.doi.org/10.1117/12.168757.

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Yang, Xuesong, Khengdauliu Chawang, and J. C. Chiao. "Wearable Iridium Oxide pH Sensors for Sweat pH Measurements." In 2019 IEEE SENSORS. IEEE, 2019. http://dx.doi.org/10.1109/sensors43011.2019.8956832.

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Reports on the topic "PH"

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Dickson, Robert B. Combined MD/PH D and PH D Training Program in Breast Cancer Prevention. Fort Belvoir, VA: Defense Technical Information Center, July 2003. http://dx.doi.org/10.21236/ada418614.

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Wagonner, R. C. Carbon Dioxide for pH Control. Office of Scientific and Technical Information (OSTI), August 2001. http://dx.doi.org/10.2172/785010.

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Hedberg, R., and P. Pomes. The CCSO Nameserver (Ph) Architecture. RFC Editor, September 1998. http://dx.doi.org/10.17487/rfc2378.

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Tarlov, M., K. Kreider, S. Semancik, and P. Huang. pH sensors based on iridium oxide. Office of Scientific and Technical Information (OSTI), March 1990. http://dx.doi.org/10.2172/7154189.

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Warren, Charlotte. Ending Eclampsia: PHC PH/E_plus Model. Population Council, 2018. http://dx.doi.org/10.31899/rh6.1013.

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Campbell, Elle. A New Ph(age) of Antibiotics. Journal of Young Investigators, April 2021. http://dx.doi.org/10.22186/jyi.39.4.54-55.

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McMullen, Larry. Sensory Preferences of Consumers for High pH, Low pH Commodity Pork Loins and Berkshire Pork Loins. Ames (Iowa): Iowa State University, January 2006. http://dx.doi.org/10.31274/ans_air-180814-986.

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Fessler. L52040 The Mechanisms of High-pH and Near-Neutral pH SCC-Unresolved Issues and Experimental Techniques. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), March 2005. http://dx.doi.org/10.55274/r0011285.

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Key unresolved issues related to the mechanisms of high-pH and near-neutral-pH stress-corrosion cracking (SCC) were identified based upon a review of the technical literature. It was determined that the mechanism of high-pH SCC is well understood, the key outstanding issue being related to the factors that affect the micro-creep properties of a steel, which seem to be the primary determinant of its susceptibility to SCC. The mechanism of near-neutral-pH SCC is not so well understood. Both dissolution and hydrogen appear to be involved, but their relative roles remain to be determined. Some experimental methods that have been used to study near-neutral-pH SCC may have produced misleading results, in that they may have introduced other failure mechanisms such as corrosion fatigue or hydrogen embrittlement, which would not be expected under normal operating conditions for a gas pipeline. Additional research into the liquid environment responsible for near-neutral-pH SCC, the time dependence of crack growth rates, and metallurgical factors influencing the susceptibility of a steel would be useful.
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Carranza, R., and R. Rebak. Notes on the Measurement of pH Values. Office of Scientific and Technical Information (OSTI), May 2005. http://dx.doi.org/10.2172/15016344.

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Taylor, P. A., and D. R. McTaggart. Segregation of metals-containing wastewater by pH. Office of Scientific and Technical Information (OSTI), October 1990. http://dx.doi.org/10.2172/6460486.

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