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Showing 1 to 20 of 142 for “"Fe3+"”.
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Prediction of Physicochemical Properties For Fe3+ Chelating Agents
… ligand possessing a very high affinity for Fe3+, but it is not orally active. 3-hydroxypyridin-4-ones (HPOs), the more recently introduced synthetic alternatives, have also been shown to be useful therapeutic chelators, demonstrating the essential affinity and selectivity for Fe3+ along with …
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The behavior of Fe3+ coordination in alginate-catechol networks
… PEG (4cPEG) and various metal ions, primarily Fe3+. While considerable testing has been conducted with 4cPEG, the effects of changing the polymer backbone have not been investigated extensively. Here, alginate was chemically modified with catechol attachments (Alg-C), and metal-coordinated with …
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Fluorescence Off-On Sensors for F-, K+, Fe3+, and Ca2+ Ions
… significant ions, including F-, K+, Fe3+, and Ca2+. All of these sensors demonstrate fluorescence "turn-on" response upon interacting with their respective ions, which makes them much more appealing than those based on fluorescence quenching mechanisms. In Chapter II, a novel highly …
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Synthesis and potential application of Fe3+/Mn2+ bimetal and hexadecyltrimethylammonium bromide (HDTMA-Br) modified clayey soils for arsenic removal in groundwater
… clay based adsorbents for arsenic removal using Fe3+ and Mn2+ oxides and hexadecylammonium bromide (HDTMA-Br) cationic surfactant as modifying agents. The first section of the work presented the hydrogeochemical characteristics of groundwater in the Greater Giyani Municipality. The results showed …
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Mineral Surface Catalyzed Polymerization Of Estrogen And Microbial Deactivation By Fe3+-Saturated Montmorillonite: A Potentially Low Cost Material For Water Decontamination
… is chosen as a carrier and modified with Fe3+ saturation for estrogen decontamination. 17β-Estradiol (βE2) has highest estrogenic activity among estrogens and is selected as representative compound. Rapid βE2 transformation in the presence of Fe3+ - saturated montmorillonite in aqueous …
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Iron reduction mediated increases in carbon oxidation and phosphorus precipitation in on-site wastewater systems
… oxidation is increased when different forms of Fe3+ are amended to septic wastewater. The rates of carbon mineralization to 14CO2 increased 2 to 5 times (relative to un-amended systems) in the presence of Fe3+. The extent of mineralization reached 90% for some carbon compounds when Fe3+ was …
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The use of organotellurium heterocycles as precursors for novel organometallic compounds
… Reaction of unsubstituted thiophene with Fe3(CO)12 results in desulfurisation of the heterocycle, with the organic fragment being recovered in the form of the ferrole, C4H4.Fe2(CO)6. In addition a novel organometallic compound of iron is isolated, the formula of which is shown to be …
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A CrpA transzporter szerepének vizsgálata stresszkezelt felületi Aspergillus nidulans tenyészetekben
… mint a referencia törzs. A Fe2+ helyett csak a Fe3+ ionok hatását tudtuk vizsgálni, azonban a mutáns és a referencia törzsek viselkedése nem tért el érdemben egymástól. Ez alapján a CrpA nem esszenciális a Fe3+ stressz kivédésében, ez azonban nem zárja ki annak lehetőségét, hogy részt vegyen a …
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Iron oxidation in (Mg,Fe)0: Calibration of the Flank method on synthetic samples and applications on natural inclusions from lower mantle diamonds
… 50% of occurrences). It is well known that the Fe3+ concentration in (Mg,Fe)O is sensitive to oxygen fugacity, even at high pressures. Therefore, the determination of Fe3+/Fetot in such inclusions provides a direct method for investigating lower mantle redox conditions during diamond formation. …
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Reactions of directly related tellurium and selenium heterocycic compunds with triiron dodecacarbonyl
… reaction of 2-telluraphthalide, C8H8OTe with [Fe3(CO)12 gave [Fe{C6H4(CH2)Te}(CO)3]2, (1). An iron atom has inserted into the telluracyclic ring, and it is probable that one co-ordinated CO ligand arises from the initially organic carbonyl group. X-ray analysis of compound (1) showed that the …
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Oxibarometría de biotita de intrusivos graníticos estériles y asociados a pórfidos cupríferos: efectos de la razón fe3+/fe2+ y el contenido de hidrógeno en la determinación de la fugacidad de oxígeno
… microsonda electrónica, se determinó la razón Fe3+/Fe2+ mediante espectroscopía Mössbauer y el contenido de hidrógeno (H) mediante análisis de reacción nuclear (NRA). La química mineral de las biotitas muestra que éstas poseen fracciones molares de Fe (XFe) entre 0.365 (La Gloria) y 0.457 (San …
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Energy-domain synchrotron radiation Mössbauer source for physics under extreme conditions
… ring operation. 2. Study of the spin state of Fe3+ ions in perovskite Silicate perovskite (Mg,Fe)(Si,Al)O3 is the most abundant phase in the Earth’s lower mantle. Knowledge of its properties is indispensable for understanding lower mantle behavior. Dynamic, thermodynamic, and transport …
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Characterization of the mineralized albitite bodies at Biggejavri, Kautokeino Greenstone Belt, Finnmark, Northern Norway
… being davidite-loveringite ((La,Ce,Ca)(Y,U)(Ti,Fe3+)20O38-(Ca,Ce)(Ti,Fe3+,Cr,Mg)21O38). The aim of this study is to better understand the formation of the complex mineralogy observed in the Biggejavri area. Amphibole from all units of the Biggejavri U-REE occurrence as well as the Bidjovagge …
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Phase Relations and Thermodynamic Properties of Spinelloid Phases in the System Mg2SiO4–Fe2SiO4–Fe3O4 at high Temperatures and Pressures
Experiments in the system Mg2SiO4–Fe2SiO4–Fe3O4 produced three spinelloid polytypes that are stable between 4 and 9 GPa and 1100°C. Spinelloid II is the first intermediate phase to appear at low pressures in Mg-poor compositions. With increasing pressure spinelloid II is replaced by an isochemical …
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Copper and Copper Alloys: Studies of Additives
… by the integration of an iron redox couple (Fe3+/Fe2+) to copper electrolytes. Certain benefits of incorporating Fe3+/Fe2+ subsystem in combination with inert anode to the electrolyte have been previously recognized, though without regards to the impact that Fe3+/Fe2+ can exert on the …
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Synthesis of binary, ternary, and alloyed metal sulfides by a solvent-less route
… preparation of (Ag+, Cd2+, Cu2+, Ni2+, Zn2+and Fe3+) doped CoS and (Cu2+, Sb3+ and Fe3+) doped AgBiS2 by solid state pyrolysis of ethylxanthate precursors. In addition to the synthetic protocol, the work demonstrates the utility of xanthates as a single source precursor in the fabrication of …
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Roles for multiple iron acquisition systems in Vibrio cholerae
… to stimulate growth in environments which favor Fe3+ and the Fe3+-specific transporter, Fbp, fails to stimulate growth in environments which favor Fe2+. While the Vct system transports high-affinity iron binding compounds, or siderophores, this system also supports robust growth in the presence …
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Estudio de la remoción de arsénico en aguas para riego mediante la adición de iones ferrato (VI)
… que las concentraciones de los iones férricos (Fe3+) fueron 3, 6 y 9 mg/L. El pH final fue llevado a 7. Las pruebas y análisis realizados demuestran que al añadir iones ferrato(VI) a una concentración de 1 mg/L e iones férricos (Fe3+) en concentración igual a 3 mg/L, seguido de microfiltración, …
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