Relevant bibliographies by topics / Fe2+/Fe3+ ratio

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

Academic literature on the topic 'Fe2+/Fe3+ ratio'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Fe2+/Fe3+ ratio"

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Brauer, David J., Gerd Hasselkuß, Sibbele Hietkamp, Herbert Sommer та Othmar Stelzer. "Lineare Oligophosphaalkane, XI [1] Stabilisierung von Phosphiniden, PH, im Clusteryerband — Röntgenstrukturanalyse von Fe4(CO)10[(μ2-PPri)2CH2](μ2-PPriMe)(μ2-H)(μ4-PH)". Zeitschrift für Naturforschung B 40, № 7 (1985): 961–67. http://dx.doi.org/10.1515/znb-1985-0719.

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Abstract Reaction of HPriP-CH2-PPriH with Fe2(CO)9 in a molar ratio of 1:2 produces a mixture of cluster compounds from which Fe4(CO)10[(μ2-PPri)2CH2](μ2-PPriMe)(μ2-H)(μ4-PH) could be isolated by liquid chromatography. X-ray structural analysis shows a planar trapezoid arrangement for the four iron atoms (Fe1 -Fe2 2,648(1), Fe2 -Fe3 2,790(1), Fe3 -Fe4 2,643(1), Fe1 --Fe4 4,109(1) Å ) capped by the novel bidentate phosphido bridge (μ2-PPri)2CH2 and the unsubstituted phosphinidene, PH( Fe1 - P4 2,284(1), Fe2 - P4 2,410(1), Fe3 - P4 2,405(1), Fe4 - P4 2,288(1), P4 - H1 1,39(4) Å).
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Jurkowski, Artur, and Zofia Lendzion-Bieluń. "Determination of Fe2+/Fe3+ mole ratio based on the change of precursor lattice parameters of wustite based iron catalysts for the ammonia synthesis." Polish Journal of Chemical Technology 21, no. 3 (2019): 48–52. http://dx.doi.org/10.2478/pjct-2019-0029.

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Abstract In the presented article, oxide forms of iron catalysts with the wustite structure and with a R = Fe2+/Fe3+ molar ratio in the range from 3.78 to 8.16 were investigated. The chemical composition of the tested catalyst precursors was determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The X-ray diffraction (XRD) technique was used to determine the phase composition and location of reflections characteristic of the Fe1−xO phase. The molar ratio of iron ions R = Fe2+/Fe3+ was determined by manganometric titration. The distribution of promoters in the structu
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Murthy, Shruthi, Mahesh Shivaswamy, Sahana Mahesh, and Srikantha Hanumanthappa. "Simultaneous Removal of Arsenite and Fluoride from Groundwater using Batch Electrochemical Coagulation Process-Role of Aluminum with Iron Electrodes." Oriental Journal of Chemistry 35, no. 1 (2019): 85–97. http://dx.doi.org/10.13005/ojc/350110.

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Aluminum(Al) and Iron(Fe) electrodes were used forsimultaneous removal of arsenite and fluoride from groundwater using novel electrochemical coagulation (ECC)with special focus on electrode placing positions of Fe and Al in a batch electrochemical reactor (BECR).A series of experiments were carried out to observe the influence of electrode placing positions on removal. Of the many electrode combination, Al1-Al2-Al3-Al4, Fe1-Fe2-Fe3-Fe4, Al1-Al2-Fe3-Al4 and Fe1-Fe2-Al3-Fe4 are discussed in this paper for pre-optimized operating conditions: 4 plate electrodes, As (III)o: 1.6 mg/L, Fo‾: 12 mg/L,
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Gholami, Fatemeh, Zahra Gholami, Martin Tomas, Veronika Vavrunkova, Somayeh Mirzaei, and Mohammadtaghi Vakili. "Promotional Effect of Manganese on Selective Catalytic Reduction of NO by CO in the Presence of Excess O2 over M@La–Fe/AC (M = Mn, Ce) Catalyst." Catalysts 10, no. 11 (2020): 1322. http://dx.doi.org/10.3390/catal10111322.

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The catalytic performance of a series of La-Fe/AC catalysts was studied for the selective catalytic reduction (SCR) of NO by CO. With the increase in La content, the Fe2+/Fe3+ ratio and amount of surface oxygen vacancies (SOV) in the catalysts increased; thus the catalytic activity improved. Incorporating the promoters to La3-Fe1/active carbon (AC) catalyst could affect the catalyst activity by changing the electronic structure. The increase in Fe2+/Fe3+ ratio after the promoter addition is possibly due to the extra synergistic interaction of M (Mn and Ce) and Fe through the redox equilibrium
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Aruoma, O. I., B. Halliwell, M. J. Laughton, G. J. Quinlan, and J. M. C. Gutteridge. "The mechanism of initiation of lipid peroxidation. Evidence against a requirement for an iron(II)-iron(III) complex." Biochemical Journal 258, no. 2 (1989): 617–20. http://dx.doi.org/10.1042/bj2580617.

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When Fe2+ ions are added to rat-liver microsomes, lipid peroxidation begins after a short lag period. Fe2+-dependent peroxidation in the first few minutes of the incubation can be increased by adding Fe3+, ascorbic acid or Pb2+ ions; these stimulations are not additive. By contrast, Pb2+ ions inhibit peroxidation of microsomes in the presence of Fe3+/ascorbate or Fe3+-ADP/NADPH. In liposomes made from ox-brain phospholipids, Fe2+-dependent peroxidation is stimulated slightly by Fe3+, but much more so by ascorbic acid, Al3+ or Pb2+; these stimulations are not additive. Liposomal peroxidation in
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Liu, Xiao Qing, and Jun Lin Xie. "Influence of Fining Temperature on Glass Qualities." Advanced Materials Research 199-200 (February 2011): 1906–11. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1906.

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To study the influence of fining temperature on glass qualities, different fining temperatures from 1400°C to 1500°C were used to prepare a series soda-lime-silica glass with identical chemical compositions. Infrared spectroscopy was used to determine the water content of glass, general analyzer of melt physical properties was used to study the viscosity and surface tension change of glass melt, microscope was carried out find glass bubbles, wet chemical analyses were used to determine the Fe2+/(Fe2++Fe3+) ratio. The results show that, generally, with the increase of fining temperature, the gl
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McGuire, Anne V., and M. Darby Dyar. "Characterization of cation oxidation states in geologic materials." Proceedings, annual meeting, Electron Microscopy Society of America 50, no. 2 (1992): 1742–43. http://dx.doi.org/10.1017/s0424820100133345.

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One shortfall of electron microprobe analysis is the inability of x-ray spectroscopic methods to distinguish multiple valence states of atoms. In geologic materials, many elements (eg. Fe, Ti, Cr, Mn, Cu, Eu) may exhibit multiple valence states and their quantitative analysis can be important in solving geologic problems. For instance, Fe2+/Fe3+ ratios in minerals may be useful in determining the oxygen fugacities in which rocks equilibrated. In the past, wet chemical methods were generally used to analyze mineral compositions and Fe2+/Fe3+ ratios were routinely determined. The advent of elect
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He, Han Bing, Yuan Wang, Pei Yu Huang, and Xu Peng Niu. "The Effect of the Fe2+B/Fe3+B Ratio on Electric Conductivity and Corrosion Resistance of Anodes." Materials Science Forum 896 (March 2017): 72–77. http://dx.doi.org/10.4028/www.scientific.net/msf.896.72.

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The effect of the Fe2+B/Fe3+B ratio (the ratio of divalent and trivalent iron ion in B position of the inverse spinel structure) in cermets on the electric conductivity and corrosion resistance of anodes was investigated. The experimental results showed that both the electrical conductivity and corrosion resistance are proportional to the Fe2+B/Fe3+B ratio on the surface of anodes because FeAl2O4 and NiAl2O4 are produced on the surface of the anode and Fe3+ in the NiFe2O4 is corroded preferentially during electrolysis.
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Graf, H., V. Reichenbach, and B. Beyme. "Oxidation of Structural Ferrous Iron in Vermiculites: I. Oxidation by Fe3+." Clay Minerals 23, no. 3 (1988): 261–70. http://dx.doi.org/10.1180/claymin.1988.023.3.03.

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AbstractVermiculite prepared from biotite by interlayer cation exchange was reacted with solutions exhibiting redox potentials between 625 and 765 mV. The redox potential was controlled by the Fe2+/Fe3+ activity ratio, measured with a Pt electrode, and kept constant by addition of hydrogen peroxide to balance electron transfer from structural Fe2+ to Fe3+ in solution. Oxidation of structural Fe2+ was followed by Eh-stat titration and the rate of oxidation was shown to depend on the amount of Fe3+ penetrating into interlayer positions. Consequently, it was affected not only by the redox potenti
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Urbański, N. K., and A. Beresewicz. "Generation of *OH initiated by interaction of Fe2+ and Cu+ with dioxygen; comparison with the Fenton chemistry." Acta Biochimica Polonica 47, no. 4 (2000): 951–62. http://dx.doi.org/10.18388/abp.2000_3950.

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Iron and copper toxicity has been presumed to involve the formation of hydroxyl radical (*OH) from H2O2 in the Fenton reaction. The aim of this study was to verify that Fe2+-O2 and Cu+-O2 chemistry is capable of generating *OH in the quasi physiological environment of Krebs-Henseleit buffer (KH), and to compare the ability of the Fe2+-O2 system and of the Fenton system (Fe2+ + H2O2) to produce *OH. The addition of Fe2+ and Cu+ (0-20 microM) to KH resulted in a concentration-dependent increase in *OH formation, as measured by the salicylate method. While Fe3+ and Cu2+ (0-20 microM) did not resu
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Dissertations / Theses on the topic "Fe2+/Fe3+ ratio"

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Eriksson, Elin, and Nicklas Kihlberg. "Bortglömda nyheter : En pilotstudie om hågkomsten av nyheterna i Dagens eko kvart i fem." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-21478.

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In this essay a pilot study on the memory of Swedish Public Service radio news is presented. 30 subjects participated in the study, which was performed during three days, 18 to 20 of November 2013. The material which formed the basis for the study consisted three newscasts of Sweden's most popular radio newscast ”Dagens eko”, which is broadcasted live at 16.45 every day in the Public Service channels SR P1 and SR P4. The subjects listened to the broadcasts each day, and their memory of them was tested the day after each broadcast. The aim of the thesis is to find out which properties of the au
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Úlehlová, Iva. "Hodnocení finanční situace FEI Company a návrhy na její zlepšení." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2007. http://www.nusl.cz/ntk/nusl-221491.

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This master´s thesis analyses financial situation of FEI Company during years 2003 – 2006 by means of selected methods of financial and economic analysis. It also includes proposals and recommendations for improvement of the present situation with regard to sphere of business and its possibilities.
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Soto, Carrillo Gerardo, and Villarreal Renzo Grández. "Regulatory contribution, tariff for radio spectrum And fee for commercial exploitation: tax aspects Of telecommunications." THĒMIS-Revista de Derecho, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/109538.

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The Peruvian government has stablished mandatory payments that telecom companies have to make: the regulatory contribution, the tariff for radio spectrum and the fee for commercial exploitation.In this article, the authors examine what tax nature and what validity basis those impositions have.<br>El Estado peruano ha establecido pagos obligatorios que deben realizar las empresas operadoras de telecomunicaciones: el aporte por regulación pagado, el canon por el uso del espectro radioeléctrico y la tasa por explotación comercial. En el presente artículo, los autores examinan qué naturaleza tribu
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Brunberg, Henrik. "Distributing digital radio over an IP backbone." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1509.

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<p>Factum Electronics AB develops and manufactures equipment for Digital Audio Broadcasting (DAB). The increasing availability of IP networks has made the possibility to distribute the DAB signal, which is traditionally distributed over dedicated telecom links, over an IP backbone an interesting issue. This thesis investigates the possibilities to do this. Since distribution over IP is an unreliable service, it discusses techniques that can be used to eliminate the lack of reliability in IP. It also examines the advantages and drawbacks of using IP multicast, which would make it possible for m
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Kim, Hyun Sung. "Experimental and Numerical Analysis of Hydroformed Tubular Materials for Superconducting Radio Frequency (SRF) Cavities." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1462533811.

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Kahindi, Roseline. "Assessment of standardized ileal digestible lysine and sulfur amino acids to lysine ratio for weaned piglets fed antibiotic-free diets." AIC publications, 2014. http://hdl.handle.net/1993/30584.

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Amino acids (AA) are required for protein accretion and the need for a specific AA depends on the physiological status, breed, and the health of the pig. Inasmuch as the AA requirements for growing pigs are given in an ideal AA ratio for protein accretion, the utilization of all AA is beyond growth and at least 30% of the total dietary AA will be used by the splanchnic tissue. A ban in the use of antimicrobial growth promoters (AGP) in piglets’ diets is likely to increase incidences of disease occurrence and exert additional AA requirements. Immune challenge models were used to determine stan
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Mustafa, Incebacak. "Design Of Series-fed Printed Slot Antenna Arrays Excited By Microstrip Lines." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612447/index.pdf.

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Series-fed printed slot antenna arrays excited by microstrip lines are low profile, easy to manufacture, low cost structures that found use in applications that doesn&rsquo<br>t require high power levels with having advantage of easy integration with microwave front-end circuitry. In this thesis, design and analysis of microstrip line fed slot antenna arrays are investigated. First an equivalent circuit model that ignores mutual coupling effects between slots is studied. A 6-element array is designed by using this equivalent circuit model. From the measurement and electromagnetic simulation re
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Quant, Anthony David. "Standardized ileal digestible tryptophan to lysine ratios in growing pigs fed U.S.-type and non-U.S.-type feedstuffs." Lexington, Ky. : [University of Kentucky Libraries], 2008. http://hdl.handle.net/10225/973.

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Thesis (M.S.)--University of Kentucky, 2008.<br>Title from document title page (viewed on February 2, 2009). Document formatted into pages; contains: ix, 146 p. : ill. (some col.). Includes abstract and vita. Includes bibliographical references (p. 138-145).
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Mattelart, Tristan. "De la guerre froide à l'entertainment : le rideau de fer à l'epreuve des radios et des télévisions sans frontières." Grenoble 3, 1994. http://www.theses.fr/1994GRE39006.

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L'objectif de cette these est d'etudier comment les radios et televisions sans frontieres occidentales ont, par dela le rideau de fer, alimente les societes des pays dits de l'est en informations et divertissements independants de l'etat-parti. La premiere partie reconstitue la genese d'un systeme de communication pense comme une citadelle qui ne souffre ni oppositions interieures, ni influences exterieures, avant de decrire les theories - le free flow of information et la coexistence pacifique - qui essaient, l'une de legitimer l'ouverture de la citadelle aux flux internationaux de communicat
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Andersson, Per. "Radio Frequency Thermal Treatment of Liver Tumours : -Influence of Blood Perfusion and Large Vessels." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11548.

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<p>Radio frequency ablation (RFA) is a commonly used minimally invasive method of treating liver cancer tumours which utilises RF current for heating tumour tissue up to a lethal temperature. RF current is generated by a power generator and applied to the tumour by an electrode which is inserted into the tumour either during percutaneous or open surgery. </p><p>RFA is a method that has great advantages compared to traditional surgical resection of tumours due to minimal invasiveness, it can be used for a greater number of patients and enables repeated treatments. Even though there are many adv
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Books on the topic "Fe2+/Fe3+ ratio"

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Bureau, United States Wireless Telecommunications. Fee filing guide. Federal Communications Commission, Wireless Telecommunications Bureau, 2002.

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United States. Wireless Telecommunications Bureau. Fee filing guide. Federal Communications Commission, Wireless Telecommunications Bureau, 2002.

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Blishen, Edward. The disturbance fee. Hamilton, 1988.

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India, Telecom Regulatory Authority of. Licence fee for radio paging service providers in cities: Consultation paper on viability assessment for licence fee determination. The Authority, 1998.

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United States. National Aeronautics and Space Administration., ed. Test results for 20-GHz GaAs FET spacecraft power amplifier. National Aeronautics and Space Administration, 1985.

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Leroux, Yvon. De la grande noirceur au plein feu. Éditions Trois-Pistoles, 2001.

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Oakner, Larry. And Now a Few Laughs from Our Sponsor. John Wiley & Sons, Ltd., 2002.

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Vigil, José Ignacio López. Golpe de radio: Los tres días que trasmitimos peligrosamente. Asociación Latinoamericana de Educación Radiofónica, 2006.

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Vigil, José Ignacio López. Golpe de radio: Los tres días que trasmitimos peligrosamente. Asociación Latinoamericana de Educación Radiofónica, 2006.

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Dulce, García, and Federación Internacional Fe y Alegría., eds. Por los caminos de la educación radiofónica. Federación Internacional Fe y Alegría, 2008.

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Book chapters on the topic "Fe2+/Fe3+ ratio"

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Jancik, D., and M. Mashlan. "Fast Determination of Fe2+/Fe3+ Ratio in Ilmenite." In Industrial Applications of the Mössbauer Effect. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0299-8_80.

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Wáczek, Zsófia, Ernö Kuzmann, Zoltán Homonnay, and Torsten Vennemann. "Mössbauer study of Fe3+/Fe2+ ratio in amphiboles to search correlation with hydrogen isotope fractionation." In ISIAME 2008. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01370-6_39.

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Sandorfi, A. M., G. Blanpied, M. Blecher, et al. "The E2/M1 Mixing Ratio in the Excitation of the Δ from Polarized Photo-Reactions." In Few-Body Problems in Physics ’93. Springer Vienna, 1994. http://dx.doi.org/10.1007/978-3-7091-9352-5_46.

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Greve, Albert, and Michael Bremer. "Temperature Measurements and FEM Thermal Deformation Calculations." In Thermal Design and Thermal Behaviour of Radio Telescopes and their Enclosures. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-03867-9_6.

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Pant, Mohit, Leeladhar Malviya, and Vineeta Choudhary. "A 28 GHz Corporate Series-Fed Taper Antenna Array for Fifth-Generation Wireless Communication." In Mobile Radio Communications and 5G Networks. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7130-5_56.

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Dryden, Gordon McL. "Ration formulation." In Fundamentals of applied animal nutrition. CABI, 2021. http://dx.doi.org/10.1079/9781786394453.0009.

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Abstract This chapter describes a method of calculating the combination of feed ingredients which will give a mixture which contains nutrients in specified concentrations. If these concentrations are similar to the animal's nutrient requirements, then it can be fed to obtain the expected production response. To correctly formulate a ration, data which is presented in a consistent manner, and is appropriate for the type of animal the ration is intended for are needed.
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Wang, C. J., Q. J. Chen, and H. X. Xia. "Optimization of Cr/Mo Molar Ratio in FeCoCrMoCBY Alloys for High Corrosion Resistance." In Fe-Based Amorphous Alloys with High Glass Forming Ability. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3932-8_39.

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Reames, Donald V. "Impulsive SEP Events (and Flares)." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_4.

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Abstract3He-rich, Fe-rich, and enriched in elements with Z &gt; 50, the abundances of solar energetic particles (SEPs) from the small impulsive SEP events stand out as luminaries in our study. The 3He is enhanced by resonant wave-particle interactions. Element abundances increase 1000-fold as the ~3.6 power of the mass-to-charge ratio A/Q from He to heavy elements like Au or Pb, enhanced during acceleration in islands of magnetic reconnection in solar jets, and probably also in flares. This power-law of enhancement vs. A/Q implies Q determined by a source temperature of 2.5–3.2 MK, typical of
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Goss, W. M., Claire Hooker, and Ronald D. Ekers. "No More Radio Stars! 1952." In Historical & Cultural Astronomy. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-07916-0_21.

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AbstractThe year 1952 was an important turning point for radio astronomers; during the year it became clear that none of the discrete radio sources were “radio stars” and that the first identifications of radio sources with galaxies and supernovae remnants were typical for the population. The year also produced one of the few fully collaborative efforts: a Christmas special appeared in Nature on 22 December 1952, “Apparent Angular Sizes of Discrete Radio Sources” (p. 1061) as papers by the Jodrell Bank team of Hanbury Brown, Jennison and Das Gupta, Mills (1952a) in Sydney and Smith (1952a, 195
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Lin, Qindong, Chun Feng, Yundan Gan, Jianfei Yuan, Wenjun Jiao, and Ying Yang. "Study of Difference in Dynamic Response of Underground Structure at Different Blast Angles." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-6238-5_32.

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AbstractThe dynamic response of underground structures under blast loading is of great military significance to strategically valuable targets, and the difference in the dynamic response of underground structures at different blast angles is investigated based on a FEM-DEM coupled method. First, a full-time numerical simulation under blast loading is carried out. Then, the displacement and fracture characteristics of the underground structure are analyzed quantitatively. The results indicate that the spatial distribution of displacement and initial fracture type is closely related to the posit
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Conference papers on the topic "Fe2+/Fe3+ ratio"

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Zhou, Zengtai, Zhe Chen, and Yu-Xiang Sun. "Differentially-Fed Large Frequency Ratio Antenna." In 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI). IEEE, 2024. http://dx.doi.org/10.1109/ap-s/inc-usnc-ursi52054.2024.10687225.

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Zhang, Jiantao, Zhan Gao, Jianyu Lan, et al. "High Distance to Diameter Ratio Wireless Power Trans-Fer System." In 2024 27th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2024. https://doi.org/10.23919/icems60997.2024.10921278.

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Zhou, Xiang, Zhengrong Ye, Weidong Jiang, et al. "Cause Analysis and Scale Control Practice of Water Injection Well in a Middle East Oilfield." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16773.

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Abstract The waterflood development was adopted in a carbonate oilfield in the Middle East to enhance oil recovery. The injection water has high salinity and high Ca2+ concentration, which lead to scale deposition in the wellbore of water injection wells, even plugging the tubing and seriously impairing the normal water injection production. To explore the causes for scale deposition in water injection wells, X-ray diffraction (XRD) technology was used to analyze the composition of the scale formation on the tubing of water injection wells. The injection water scale tendency was simulated to f
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Veerpalu, Vyacheslav, Evgeny Devyatkin, Nickolay Kharitonov, and Nickolay Khokhlachev. "Technique for Determination of User Fee for Radio Spectrum." In 19th International Wroclaw Symposium and Exhibition on Electromagnetic Compatibility. IEEE, 2008. https://doi.org/10.23919/wroc.2008.10843025.

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Okocha, Cyril, and Ken Sorbie. "Scale Prediction for Iron, Zinc and Lead Sulphides and Its Relation to Scale Test Design." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-3766.

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Abstract The accurate prediction and management of oilfield sulphide scales, such as iron sulphide, is an important issue in oil production. This has become particularly significant as high temperature high pressure (HTHP) fields are being brought into production, and the life of mature fields is being extended. In such systems, additional scales such zinc and lead sulphide (ZnS and PbS) are often being reported. This paper presents a detailed description of a sulphide modelling approach, leading to the prediction of saturation ratios (SRs) and masses of the formed sulphide scales, final solut
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Lee, H.-R., H. Shin, S.-C. Shim, and Y. Kang. "Viscosity measurement of FeO-SiO2 based slags under controlled oxygen partial pressures." In 12th International Conference of Molten Slags, Fluxes and Salts (MOLTEN 2024) Proceedings. Australasian Institute of Mining and Metallurgy (AusIMM), 2024. http://dx.doi.org/10.62053/lyvj9833.

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Since iron oxide and silicon oxide are major gangue components in various types of ore, FeO-SiO2 base slag, ie fayalite slag, has been often encountered in pyrometallurgical processes of non-ferrous metals. During most matte production processes such as the smelting of Cu, Pb, and Ni, the FeO-SiO2 based slag is inevitably formed and plays an important role in refining crude metal as well as engineering aspects. Recently, similar pyrometallurgical approaches have been attempted in the recovery of valuable metals (Ni, Co, Cr) from wasted secondary batteries. Thus, the viscosity of the FeO-SiO2 b
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Inoue, R., N. Kado, T. Iwama, and S. Ueda. "Effect of solid-solved FeO and MnO on hydration of free MgO in steelmaking slag." In 12th International Conference of Molten Slags, Fluxes and Salts (MOLTEN 2024) Proceedings. Australasian Institute of Mining and Metallurgy (AusIMM), 2024. http://dx.doi.org/10.62053/lkcs2487.

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Steelmaking slags are usually used as roadbed and civil engineering materials. However, the expansion phenomenon, which is caused by the volume expansion during hydration of free CaO and free MgO contained in steelmaking slag, is indispensable. Since the hydration of free MgO in steelmaking slag is much slower than that of free CaO, it is qualitatively considered that free MgO contributes to the hydration expansion of steelmaking slag over a long period of time. Similar to free CaO, free MgO consists of undissolved MgO and crystallised MgO in steelmaking slag. The latter precipitates during sl
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Smirl, Arthur L., J. Dubard, George C. Valley, and Thomas F. Boggess. "Picosecond Photorefractive and Free-Carrier Nonlinearities in Semiconductors." In Nonlinear Optical Properties of Materials. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/nlopm.1988.mc3.

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A variety of picosecond time-resolved two-beam coupling, transient grating and degenerate-four-wave mixing techniques are used to investigate the nonlinear loss and to measure the strength, formation and decay of photorefractive gratings written in GaAs and InP:Fe and of free-carrier gratings written in Si, GaAs, and InP by 43-ps pulses at a wavelength of 1 μm. We present data and numerical calculations as a function of fluence, time delay, pump-to-probe ratio, pump polarization, analyzer angle and crystal orientation. We observe photorefractive gains of a few percent at fluences of a few pJ/μ
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Brülisauer, Simon, Daniel Fluck, Peter Günter, Lutz Beckers, and Christoph Buchal. "Controlled Reduction of Fe-doped KNbO3 by Proton-irradiation." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cfe6.

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We report for the first time on proton-irradiation as a method to precisely adjust the reduction ratio, i.e. the ratio R = [Fe2+]/[Fe3+], of Fe:KNbO3 over three orders of magnitude. By applying this technique, we were able to alter the photorefractive gain Γ from 2.5 cm−1 up to 34 cm−1, the absorption constant α from 0.06 cm−1 up to 2.1 cm−1 and the grating buildup time τ from 1.6 ms down to 34 µs at an intensity I = 200 W/cm2 in a 1000 ppm Fe-doped KNbO3 crystal, for example [1]. The major advantage of ion-irradiation is that it is a very homogeneous and a very reproducible process, which can
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Jarrahian, K., K. S. Sorbie, F. J. Azuddin, and G. Ness. "Iron Sulphide (FeS) Scale Prediction-Modelling Development and Experimental Methodology Design." In SPE International Conference and Exhibition on Formation Damage Control. SPE, 2024. http://dx.doi.org/10.2118/217871-ms.

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Abstract Iron sulphide (Fes) scale is widely present in both oilfield and geothermal systems and causes a range of production and Health and Safety problems. Although substantial progress has been made, continued efforts are needed to precisely understand and predict FeS scaling. The aim of this work is to present a simple robust model for FeS scale experiments in the laboratory. This model predicts saturation ratios (SRs) and masses of the formed iron sulphide scale, final solution compositions and final pH levels, for specific lab experiments. This model is verified by comparing results with
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Reports on the topic "Fe2+/Fe3+ ratio"

1

Baumann, E. W. Determination of Fe(II)Fe(II) ratio in glass. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/6332839.

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2

Jantzen, C. M. The determination of the Fe sup 2+ /Fe sup 3+ ratio in simulated nuclear waste glass by ion chromatography. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6017326.

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Okal, E. A., and S. H. Kirby. Energy-to-moment ratios for damaging intraslab earthquakes: preliminary results on a few case studies. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/222535.

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Rugge, Hugo R., and David L. McKenzie. X-Ray Line Ratios for Fe XVII Observed in the Solar Corona. Defense Technical Information Center, 1985. http://dx.doi.org/10.21236/ada162320.

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5

Lawanprasert, Somsong, Chaiyo Chaichantipyuth, Supatra Srichairat, Nuansri Niwattisaiwong, and Laddawal Phivthong-ngam. Subchronic exposure of Pueraria mirifica in normal - and high cholesterol diet fed rats : influence on hepatic cytochrome P450, lipid profile and toxicity. Chulalongkorn University, 2004. https://doi.org/10.58837/chula.res.2004.28.

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Pueraria mirifica airy shaw and suvatabandhu, know locally as Kwao Keur, is a plant in family Leguminosae. In this study, effects of P.mirifica on hepatic cytochrome P450 (CYP), serum lipid profile and subchronic toxicity were investigated in male Wistar rats. Rats were randomly divided into four treatment groups as following: normal diet-fed group; normal diet-fed supplemented with P.mirifica group; high cholesterol diet-fed group; high cholesterol diet-fed supplemented with P.mirifica group. Each group comprised 10 rats. P.mirifica was administered orally at a dosage of 100 mg/kg/day for 90
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Serafica, Ramonette, and Queen Cel Oren. Analysis of the Competition Landscape of Philippine Mass Media. Philippine Institute for Development Studies, 2024. https://doi.org/10.62986/dp2024.29.

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This study examines the size and distribution of the Philippine media sector, identifies the challenges to competition and growth, and explores the impact of new technologies. A layered media model was used to map the major players, primarily in traditional media industries such as news publishing, TV broadcasting, and radio broadcasting. Concentration ratios at the national and regional levels were calculated, along with a simple and novel measure that captures diversity in media supply. The extent of market concentration in other relevant industries in the information and communication secto
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Mwamba, Isaiah C., Deepak Benny, Ajuna P. John, et al. Updating Cost Allocation and Revenue Attribution. Purdue University, 2024. http://dx.doi.org/10.5703/1288284317764.

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This report presents a synopsis of the results from the 2024 study commissioned by the Indiana Department of Transportation (INDOT) in fall 2023 at the request of the Indiana General Assembly. Expenditures: Lighter vehicle classes saw their share of cost responsibility decline between 2015 and 2024, while the heavier vehicle classes saw their responsibilities increase within this period. This change is explained by a diametric shift in expenditure type patterns between the two eras from construction-dominant to maintenance-dominant expenditures. In this context, it is worth noting that these e
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Zhang, Xingyu, Matteo Ciantia, Jonathan Knappett, and Anthony Leung. Micromechanical study of potential scale effects in small-scale modelling of sinker tree roots. University of Dundee, 2021. http://dx.doi.org/10.20933/100001235.

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When testing an 1:N geotechnical structure in the centrifuge, it is desirable to choose a large scale factor (N) that can fit the small-scale model in a model container and avoid unwanted boundary effects, however, this in turn may cause scale effects when the structure is overscaled. This is more significant when it comes to small-scale modelling of sinker root-soil interaction, where root-particle size ratio is much lower. In this study the Distinct Element Method (DEM) is used to investigate this problem. The sinker root of a model root system under axial loading was analysed, with both upw
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Kontak, D. J., S. Paradis, Z. Waller, and M. Fayek. Petrographic, fluid inclusion, and secondary ion mass spectrometry stable isotopic (O, S) study of Mississippi Valley-type mineralization in British Columbia and Alberta. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/327994.

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A comprehensive study of Mississippi Valley-type base-metal deposits across the Canadian Cordillera was done to compare and contrast their features. Extensive dissolution of host rocks is followed by multiple generations of dolomite cements from early, low-temperature, fine-grained to coarser, higher temperature types that overlap with Zn-Pb sulfide minerals; late-stage calcite occludes residual porosity. Dolomite is generally chemically stoichiometric, but ore-stage types are often rich in Fe (&amp;amp;lt;1.3 weight per cent FeO) with small sphalerite inclusions. Sphalerite-hosted fluid inclu
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Hajj, Ramez, Marshall Thompson, Renan Santos Maia, et al. Updates to Mechanistic-Empirical Design Inputs for Illinois Flexible Pavements. Illinois Center for Transportation, 2024. http://dx.doi.org/10.36501/0197-9191/24-010.

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This study reviews the Illinois Department of Transportation’s full-depth asphalt, limiting strain criterion, and asphalt over rubblized concrete design procedures, considering technological advancements in hot-mix asphalt—namely, the increased use of recycled materials and modified asphalt binders. The researchers evaluated the current |E*| algorithm by conducting laboratory tests with four mix designs and seven asphalt binders of different Superpave performance grades. They compared predictive models, including the current Illinois modulus algorithm as well as the Witczak, Hirsch, and newly
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