Relevant bibliographies by topics / Proposed stoichiometry

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Proposed stoichiometry'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Proposed stoichiometry"

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Haaning Nielsen, A., J. Vollertsen, and T. Hvitved-Jacobsen. "Chemical sulfide oxidation of wastewater - effects of pH and temperature." Water Science and Technology 50, no. 4 (2004): 185–92. http://dx.doi.org/10.2166/wst.2004.0258.

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In this study, the kinetics and stoichiometry of chemical sulfide oxidation of wastewater from sewer networks were investigated. Based on experiments, it was shown that the stoichiometry could be considered identical for wastewater from two sampling sites. However, the kinetics differed significantly among the wastewaters from the two sites. Effects of pH and temperature were investigated in the pH and temperature ranges 5-9 and 5-25°C, respectively. The rate of chemical sulfide oxidation could be related to the dissociation of H2S to HS-, with HS- being oxidized at a higher rate than H2S. The
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Sun, Long, Xu Dou, and Tongxin Hu. "Research progress on the influence of forest fire on the eco-stoichiometric characteristics of carbon, nitrogen and phosphorus in forest ecosystem." Sustainable Forestry 5, no. 2 (2022): 39. http://dx.doi.org/10.24294/sf.v5i2.1627.

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Forest fire can change the eco-stoichiometric characteristics of forest ecosystem elements, reflect the biogeochemical cycle change mode of forest ecosystem environment after fire, and clarify the eco-stoichiometric characteristics of carbon (C), nitrogen (N), phosphorus (P) in forest ecosystem under forest fire disturbance, which is very important for understanding the response mechanism of forest ecosystem to forest fire disturbance. By consulting a large number of relevant literatures, the author summarized and analyzed the impact mode of forest fire disturbance on the C–N–P eco-stoichiomet
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Mori, Taiki. "The newly proposed threshold for enzymatic stoichiometry: A reliable solution?" Soil Biology and Biochemistry 209 (October 2025): 109886. https://doi.org/10.1016/j.soilbio.2025.109886.

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Sari, Y., A. Manaf, W. Astuti, T. Haryono, F. Nurjaman, and F. Bahfie. "Recovery of ferronickel by green selective reduction of nickel laterite." IOP Conference Series: Earth and Environmental Science 1388, no. 1 (2024): 012026. http://dx.doi.org/10.1088/1755-1315/1388/1/012026.

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Abstract The conversion of nickel laterite into ferronickel is commonly done through a high-temperature pyrometallurgical process that utilizes fossil fuels, which leads to environmental emissions. In order to deal with this, a biomass-based selective reduction process is proposed that uses palm shell charcoal (PSC) as the reductant. In this study, we investigate how to selectively reduce saprolytic nickel ore in various conditions, including pelletization, reduction at 1150°C for one hour, and wet magnetic separation. The optimal conditions, determined with 0.3 stoichiometric carbon, yielded
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BOUTAOUI, N., A. BENABBES, and K. RAMDANE. "SYNTHESIS AND CHARACTERIZATION OF POTASSIUM SODIUM NIOBATE PHASES." International Journal of Modern Physics B 22, no. 13 (2008): 2169–76. http://dx.doi.org/10.1142/s0217979208039393.

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Potassium niobate KNbO 3 and some compounds of ( K 1-x Na x) NbO 3 (x = 0.3, 0.4, 0.6, 0.7) ceramics powders were successfully prepared by the solid-state reaction method using a non-stoichiometric mixture of starting materials. A possible formation of these phases was proposed based on the experimental results. All of the prepared compounds were characterized using the X-ray diffraction method, and grain size has been calculated using SEM images, and their stoichiometry was obtained from the EDAX results.
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Lefevre, M. J., J. S. Speck, R. W. Schwartz, D. Dimos, and S. J. Lockwood. "Microstructural development in sol-gel derived lead zirconate titanate thin films: The role of precursor stoichiometry and processing environment." Journal of Materials Research 11, no. 8 (1996): 2076–84. http://dx.doi.org/10.1557/jmr.1996.0261.

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The role of precursor stoichiometry and local firing environment on the microstructural development of sol-gel derived lead zirconate titanate (PZT) thin films was investigated. Typically, excess Pb is added to films to compensate for PbO volatilization during heat treatment. Here, it is shown that the use of stoichiometric precursors with either a PbO atmosphere powder or a PbO overcoat during the crystallization heat treatment is an attractive and viable alternative method for control of film stoichiometry. Using these approaches, we have fabricated single phase perovskite thin films with mi
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Reséndiz-Muñoz, J., M. T. Zagaceta-Álvarez, J. L. Fernández-Muñoz, and M. A. Gruintal-Santos. "Mathematical model depicting the deposition kinetics process into rf-magnetron co-sputtering of strontium barium titanate thin films." Digest Journal of Nanomaterials and Biostructures 17, no. 1 (2022): 1–10. http://dx.doi.org/10.15251/djnb.2022.171.1.

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"Thin films deposition kinetics of BaXSr1-XTiO3 (BST)/nichrome is modeled by the stoichiometric rate of a perovskite-type material such as ABO3, where cations A, B, and the anion oxygen should ideally have a 1:1:3 rate, respectively. The experimental stoichiometry data measured by EDS on films of 240 nm, and the Ba/Sr, (Ba+Sr)/Ti rates considered in percentages starting from arithmetic and the sigmoidal relationship between Ba and Sr. They show relationships in sigmoidal, exponential, and parabolic mathematical functions that together describe the BST thin films deposition kinetics by means of
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Neeraj, Sharma, Sharma Vipin, S. Bhatt S., and Chaudhry S.C. "Reactivity of some di- and triphenyltin(IV) hydroxamates with ligands containing labile protons." Journal of Indian Chemical Society Vol. 76, Oct 1999 (2022): 469–71. https://doi.org/10.5281/zenodo.5852589.

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Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171 005, India <em>Manuscript received 18 December 1998, revised 22 June 1999, accepted 29 June 1999</em> The reactivity of di- and triphenyltin(IV) hydroxamate complexes of composition <strong>(C<sub>6</sub>H<sub>5</sub>)<sub>2</sub>SnCl<sub>2-n</sub>(XBHA)<sub>n</sub></strong> and <strong>(C<sub>6</sub>H<sub>5</sub>)<sub>3</sub>Sn(XBHA) </strong>(<em>n</em> = 1 and 2; X = <em>p</em>-OMe, <em>o</em>-Cl, <em>p</em>-NO<sub>2</sub>; BHA = anion of <strong>XArCONHOK</strong>) with ligands containing labile protons such as a
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Segedinac, M. T., S. Horvat, D. D. Rodić, T. N. Rončević, and G. Savić. "Using knowledge space theory to compare expected and real knowledge spaces in learning stoichiometry." Chemistry Education Research and Practice 19, no. 3 (2018): 670–80. http://dx.doi.org/10.1039/c8rp00052b.

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This paper proposes a novel application of knowledge space theory for identifying discrepancies between the knowledge structure that experts expect students to have and the real knowledge structure that students demonstrate on tests. The proposed approach combines two methods of constructing knowledge spaces. The expected knowledge space is constructed by analysing the problem-solving process, while the real knowledge space is identified by applying a data-analytic method. These two knowledge spaces are compared for graph difference and the discrepancies between the two are analysed. In this p
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Dudnikova V. D., Antonov D. I., Zharikov E. V., and Eremin N. N. "Energy of formation of intrinsic defects and their clusters in the powellite CaMoO-=SUB=-4-=/SUB=-." Physics of the Solid State 64, no. 10 (2022): 1425. http://dx.doi.org/10.21883/pss.2022.10.54231.354.

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Atomistic simulation of powellite crystals has been carried out. A system of parameters of interatomic potentials is proposed for the calculation of point defects in powellite. The formation energies of intrinsic defects and their clusters, which are spatially related combinations of defects, are estimated. The most favorable localization of interstitial calcium and oxygen ions was determined. The formation energies of the Frenkel and Schottky defects are calculated. It was shown that the most energetically preferred in stoichiometric powellite are the oxygen Frenkel defects. Defects arising f
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Dissertations / Theses on the topic "Proposed stoichiometry"

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Santos, Livia Cristina dos. "Dificuldades de aprendizagem em estequiometria: uma proposta de ensino apoiada na modelagem." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16103.

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Made available in DSpace on 2014-12-17T15:05:02Z (GMT). No. of bitstreams: 1 LiviaCS_DISSERT.pdf: 8592090 bytes, checksum: 17350a6ff1dce1dfa5ece4d032d1bfc5 (MD5) Previous issue date: 2013-07-30<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>In order to learn/teach chemistry some themes are relevant, like the stoichiometry, which consists in the study of the weight ratios in the combination of elements and compounds between themselves. This is an underlying subject in the understanding/representation/forethought of chemical reactions. Considering these aspects, our st
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Books on the topic "Proposed stoichiometry"

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Givnish, Thomas J., K. William Sparks, Steven J. Hunter, and Andrej Pavlovič. Why are plants carnivorous? Cost/benefit analysis, whole-plant growth, and the context-specific advantages of botanical carnivory. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0018.

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The 1984 cost/benefit model for the evolution of carnivorous plants addresses their potential energetic and ecological advantages. It has provided a conceptual framework for research on distribution, variation in trap allocation and mechanisms, association with low rates of photosynthesis and whole-plant growth, and ecology of carnivorous plants relative to noncarnivorous ones. We re-assess this model, its potential extensions, and the validity of its assumptions and predictions. We review what is known about photosynthesis, respiration, relative growth rates, and resource allocation in carniv
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Садовников, Василий. Теория гетерогенного катализа. Теория хемосорбции. Publishing House Triumph, 2021. http://dx.doi.org/10.32986/978-5-40-10-01-2001.

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This monograph is a continuation of the monograph by V.V. Sadovnikov. Lateral interaction. Moscow 2006. Publishing house "Anta-Eco", 2006. ISBN 5-9730-0017-6. In this work, the foundations of the theory of heterogeneous catalysis and the theory of chemisorption are more easily formulated. The book consists of two parts, closely related to each other. These are the theoretical foundations of heterogeneous catalysis and chemisorption. In the theory of heterogeneous catalysis, an experiment is described in detail, which must be carried out in order to isolate the stages of a catalytic reaction, t
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Book chapters on the topic "Proposed stoichiometry"

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Pawar, R. R., V. J. Suryavanshi, M. M. Patil, A. G. Mulik, S. S. Patil, and G. N. Mulik. "N-n-HEPTYLANILINE AS A NEW REAGENT FOR THE LIQUID-LIQUID EXTRACTION OF THALLIUM (III)." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 10. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bbcs10p3ch4.

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The present study is concerned with the simple solvent extraction of thallium(III) from mineral acid media with N-n-heptylaniline in xylene is reported in this paper. Thallium(III) was back extracted with acetate buffer (pH = 4.63). The effect of acid and extractant media, role of various diluents, stripping agents, loading capacity, aqueous to organic volume ratio, equilibrium time, temperature effect on extraction of thallium(III) has been studied. The stoichiometry of extracted species was determined on the basis of slope analysis method. The method was free from interference of large numbe
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Jordan, Robert B. "Rate Law and Mechanism." In Reaction Mechanisms of Inorganic and Organometallic Systems. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195301007.003.0004.

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Once the experimental rate law has been established, the next step is to formulate a mechanism that is consistent with the rate law. The rate law will not uniquely define the mechanism but will limit the possibilities. The proposed mechanism will lead to predictions of trends in reactivity and other types of experiments that can be done to test the proposal. These aspects will be described in later chapters for specific types of reactions. Except for the simplest cases, the development of the rate law from the mechanism can be a messy exercise. The following sections describe some of the assum
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Oriakhi, Christopher O. "Atomic Structure and Isotopes." In Chemistry in Quantitative Language. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780195367997.003.0007.

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John Dalton proposed his theory of the atom in 1808 based on experimental data and chemical laws known in his day. The theory states that: 1. All chemical elements are made up of tiny indivisible particles called atoms. 2. Atoms cannot be created or destroyed. Chemical reactions only rearrange the manner in which atoms are combined. 3. Atoms of the same element are identical in all respects and have the same masses and physical and chemical properties. Atoms of different elements have different masses as well as different physical and chemical properties. 4. Combination of elements to form a c
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Šesták, Jaroslav. "On Application of Hyperfree Energy for the Description of Thermodynamics of Mobile Components in Nonstoichiometric Partially Open Ceramic Systems." In Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.89584.

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Nonstoichiometric oxides form a new chapter in tailored materials. Founding and construction of thermodynamic functions related to solid (geologic, metallurgic) materials is traced showing interactions between Czech Professor F. Wald and Russians R.S. Kurnakov and D.S. Korzhinskiĭ and further developed by Czech P. Holba in the initial phase definition and related characterization of partially open systems. A gradual increase in thermodynamic concepts related to solid-state description is investigated in more detail. For the associated thermodynamic definition of the mobile component, the previ
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Chen, C. Y., and D. J. Hart,. "Total Synthesis of Stenine." In Exercises in Synthetic Organic Chemistry. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780198559443.003.0056.

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Abstract Discussion Points Propose a structure for the other potential diastereoisomer arising from the intramolecular Diels-Alder cycloaddition. What is the mechanism of the Hoffman-type degradation of step f? A substantial amount of compound 14 is recovered if the Claisen rearrangement is attempted without selective protection of the primary hydroxyl group formed in step p. Further Reading For a review on diastereoselective Claisen rearrangements, see: H.J. Altenbach, Org. Synth. Highlights,1991, 115. For a study of Diels-Alder reaction on trienic esters in the absence and presence of a Lewi
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Xu, Huifang, Kuang-Sheng Hong, Meiye Wu, and Seungyeol Lee. "Tectonic hydrogen and tectonic oxygen production through deforming piezoelectric minerals in the presence of water." In In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science. Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.2553(12).

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ABSTRACT A high concentration of hydrogen gas occurs in fracture zones of active faults that are associated with historical earthquakes. To explain the described phenomenon, we propose the piezoelectrochemical (PZEC) effect as a mechanism for the direct conversion of mechanical energy to chemical energy. When applied to natural piezoelectric crystals including quartz and serpentine, hydrogen and oxygen are generated via direct water decomposition. Laboratory experiments show H2 gas is generated from strained piezoelectric material due to the extremely low solubility of H2, suggesting that the
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Gutakovskis, Viktors, and Vladimirs Gudakovskis. "Performance Assessment of the Thermodynamic Cycle in a Multi-Mode Gas Turbine Engine." In Gasification [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97458.

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This chapter discusses the direction of development of promising multimode aviation gas turbine engines (GTE). It is shown that the development of GTE is on the way to increase the parameters engine workflow: gas temperatures in front of the turbine (T*G) and the degree of pressure increase in the compressor (P*C). It is predicted that the next generation engines will operate with high parameters of the working process, T*G = 2000–2200 K, π*C = 60–80. At this temperature of gases in front of the turbine, the working mixture in the combustion chamber (CC) is stoichiometric, which sharply narrow
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Conference papers on the topic "Proposed stoichiometry"

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Shaw, S. S., and K. S. Sorbie. "Structure and Stoichiometry of Mixed Calcium–Magnesium–Phosphonate Scale Inhibitor Complexes for Application in Precipitation Squeeze Processes." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-3865.

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Abstract Phosphonate scale inhibitors (SIs) applied in downhole squeeze applications may be retained in the near-well formation through adsorption and/or precipitation mechanisms. In this paper, we focus on the properties of precipitated “mixed” calcium and magnesium phosphonate complexes formed by nine common phosphonate species. By “mixed”, we mean anionic SI bound to both calcium and magnesium divalent cations, i.e. the complex SI_Can1_Mgn2 is formed where n1 and n2 are the stoichiometric coefficients for Ca and Mg, respectively. The stoichiometry (n1 and n2 or the Ca2+/P and Mg2+/P molar r
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Paige, Jack I., and Bernard S. Covino. "Leachability of Lead from Selected Copper-Base Alloys Used by the Plumbing Industry." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92438.

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Abstract The Bureau of Mines has conducted research on the selective leaching of lead from copper-base alloys in high purity water. Lead leached from these alloys can cause serious health problems when ingested. The alloys in this study were selected as being representative of those used in various plumbing system fixtures such as faucets and valves. Leaching tests were conducted for a total period of 14 days and at temperatures of 25°C, 50°C, and 75°C. An acetic acid pretreatment was used in an effort to reduce the amount of lead that was leached from the alloys. The results show that, with t
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Kung, S. C., and C. F. Eckhart. "Corrosion of Iron-Base Alloys in Reducing Combustion Gases." In CORROSION 1993. NACE International, 1993. https://doi.org/10.5006/c1993-93242.

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Abstract The corrosion resistance of many iron-base alloys was evaluated in laboratory retorts under sub-stoichiometric combustion environments. The exposures were designed to simulate the H2S-containing flue gases generated in the combustion zone of PC-fired utility boilers. The tests were carried out isothermally at three temperatures (i.e., 500, 700, and 900°F) and in gases containing three levels of H2S concentrations (i.e., 0.05, 0.25, and 0.5 vol.%). An exposure time of 1000 hours was employed for all tests. After the exposures, the corrosion rates of these alloys were measured and the m
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Rocchini, Gabriele. "pH Influence on Magnetite Stability in Steam Generator Tubes." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92252.

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Abstract Magnetite solubility, as a function of temperature and partial hydrogen pressure and with reference to the typical conditions of the operating fluid of a steam generator of a thermal power plant, has been studied by rigorously solving the problem of chemical equilibria and adopting the scheme proposed by Sweeton and Baes. Stoichiometric calculations have proved that magnetite solubility attains its maximum value, which depends on the characteristics of the electrolytic solution, when temperature is about 100°C, independently of the type of environment. The rigorous pH calculation was
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Mauer, G., D. Sebold, R. Vaßen, and D. Stöver. "Improving Atmospheric Plasma Spraying of Zirconate Thermal Barrier Coatings based on Particle Diagnostics." In ITSC2011, edited by B. R. Marple, A. Agarwal, M. M. Hyland, et al. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0561.

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Abstract Lanthanum zirconate (La2Zr2O7) was proposed as a promising material for thermal barrier coatings. At atmospheric plasma spraying (APS) of La2Zr2O7 a considerable amount of La2O3 can evaporate in the plasma flame, resulting in a non-stoichiometric coating. As indicated in the phase diagram of the La2O3-ZrO2 system, in the composition range of pyrochlore structure, the stoichiometric La2Zr2O7 has the highest melting point and other compositions are eutectic. APS experiments were performed with a TriplexPro-200 plasma torch at different power levels to achieve different degrees of evapor
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Padgett, Andrew. "The Role of Stoichiometry in Mn1-xZnxFe2O4 Ferrite Microwave Absorbers." In Proposed for presentation at the IEEE MMM 2022 held October 31-November 4, 2022 in Minneapolis, Minnesota United States. US DOE, 2022. http://dx.doi.org/10.2172/2005529.

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Bishop, Sean, Wei Li, Dawei Zhang, et al. "Oxygen non-stoichiometry and point defect equilibria in (La1/6Pr1/6Nd1/6Gd1/6Ba1/6Sr1/6)MnO3-&#948; at 1200 ? 1450 oC." In Proposed for presentation at the 243rd Electrochemical Society Meeting in ,. US DOE, 2022. http://dx.doi.org/10.2172/2006187.

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Cheng, Xinyu, Rongzheng Liu, Bing Liu, et al. "Effects of Stoichiometry and High-Temperature Annealing on Zirconium Carbide Coating Layer in TRISO Particles." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-92858.

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Abstract Very-high-temperature gas-cooled reactors (VHTR) are being developed to provide higher thermal efficiency and high-temperature process heat. Zirconium carbide (ZrC) has been proposed as a potential coating material for TRistructural-ISOtropic (TRISO) coated fuel particles because of its excellent resistance to fission products corrosion, good thermal stability and higher mechanical strength under elevated temperatures. The integrity and performance of the ZrC coating of the TRISO particles are very important as it provides the main barrier for fission product release. Therefore, the m
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Buie, Cullen R., Jonathan D. Posner, Tibor Fabian, et al. "Active Water Management for Proton Exchange Membrane Fuel Cells Using an Integrated Electroosmotic Pump." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79728.

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We have developed proton exchange membrane fuel cells (PEMFC’s) with integrated planar electroosmotic pumping structures that actively remove liquid water from cathode flow channels. Recent experimental and numerical investigations on PEMFC’s emphasize water management as a critical factor in the design of robust, high efficiency fuel cells. Although various passive water management strategies have been proposed, water is still typically removed by pumping air into cathode channels at flow rates significantly larger than those required by fuel cell stoichiometry. This method of water removal i
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Zhang, Lifeng, and Ryan Anderson. "An Updated Two-Phase Flow Regime Map in Active PEM Fuel Cells Based on a Force Balance Approach." In ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/icnmm2015-48527.

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The water balance in proton exchange membrane (PEM) fuel cells still remains a topic of much investigation in order to maintain satisfactory cell performance. One specific water management issue relates to the gas-liquid flows that occur when water enters the reactant flow field channels, which are typically microchannels or minichannels. Due to its unique water introduction, the Lockhart-Martinelli (LM) approach has been revised for its applicability in predicting the two-phase pressure drop in these channels where water emerges from a gas diffusion layer perpendicular to the direction of gas
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Reports on the topic "Proposed stoichiometry"

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Dudareva, Natalia, Alexander Vainstein, Eran Pichersky, and David Weiss. Integrating biochemical and genomic approaches to elucidate C6-C2 volatile production: improvement of floral scent and fruit aroma. United States Department of Agriculture, 2007. http://dx.doi.org/10.32747/2007.7696514.bard.

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The specific objectives of approved proposal include to: 1. Elucidate the C6-C2 biochemical pathways leading to the biosynthesis of phenylacetaldehyde, phenylethyl alcohol and phenylethyl acetate in floral tissues of ornamentally important plants, pefunia and roses. 2. Isolate and characterrze genes responsible for the production of these C6-C2 compounds and those involved in the regulation of the pathway using genomic and transcriptomic tools. 3. Determine whether altering the expression of key genes of this pathway can result in changing the aroma characteristics of flowers. Aldehydes are in
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