scholarly journals Effect of Heme Iron Valence State on the Conformation of Cytochromecand Its Association with Membrane Interfaces

2000 ◽  
Vol 276 (1) ◽  
pp. 153-158 ◽  
Author(s):  
Iseli L. Nantes ◽  
Maria R. Zucchi ◽  
Otaciro R. Nascimento ◽  
Adelaide Faljoni-Alario
Keyword(s):  
Valence State ◽  
Heme Iron ◽  
Membrane Interfaces ◽  
Iron Valence

The importance of the iron valence state in NiCoFe nanosheet array catalysts for the oxygen evolution reaction

2021 ◽  
Author(s):  
Hua-Shuai Hu ◽  
Yang Li ◽  
Gao Deng ◽  
Ya-Ru Shao ◽  
Ke-Xin Li ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Valence State ◽  
Nanosheet Array ◽  
Iron Valence ◽  
Catalytic Performances

The catalytic performances of NiCoFe nanosheet array catalysts for the OER are strongly dependent on the valence state of iron cations in the precursors.

The relaxation dynamics, iron valence state, and Mössbauer effect in PFN ceramics

2011 ◽  
Vol 75 (5) ◽  
pp. 731-733 ◽  
Author(s):  
A. V. Pavlenko ◽  
A. T. Kozakov ◽  
S. P. Kubrin ◽  
A. A. Pavelko ◽  
K. A. Guglev ◽  
...  
Keyword(s):  
Valence State ◽  
Mössbauer Effect ◽  
Relaxation Dynamics ◽  
Mossbauer Effect ◽  
Iron Valence

Use of multivariate analysis for synchrotron micro-XANES analysis of iron valence state in amphiboles

2016 ◽  
Vol 101 (5) ◽  
pp. 1171-1189 ◽  
Author(s):  
M. Darby Dyar ◽  
Elly A. Breves ◽  
Mickey E. Gunter ◽  
Antonio Lanzirotti ◽  
Jonathan M. Tucker ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Valence State ◽  
Iron Valence ◽  
Xanes Analysis

Iron valence state of fine-grained material from the Jupiter family comet 81P/Wild 2 – A coordinated TEM/STEM EDS/STXM study

2013 ◽  
Vol 122 ◽  
pp. 1-16 ◽  
Author(s):  
Julien Stodolna ◽  
Zack Gainsforth ◽  
Hugues Leroux ◽  
Anna L. Butterworth ◽  
Tolek Tyliszczak ◽  
...  
Keyword(s):  
Valence State ◽  
Fine Grained ◽  
Fine Grained Material ◽  
Iron Valence

Normal to inverse transition in martian spinel: Understanding the interplay between chromium, vanadium, and iron valence state partitioning through a crystal-chemical lens

2015 ◽  
Vol 100 (10) ◽  
pp. 2018-2025 ◽  
Author(s):  
James J. Papike ◽  
Paul V. Burger ◽  
Aaron S. Bell ◽  
Charles K. Shearer ◽  
Loan Le ◽  
...  
Keyword(s):  
Valence State ◽  
Crystal Chemical ◽  
Iron Valence ◽  
Inverse Transition

Corrosion Behaviour of Truw Base and Reference Glasses

1983 ◽  
Vol 26 ◽  
Author(s):  
P. Van Iseghem ◽  
W. Timmermans ◽  
R. De Batist
Keyword(s):  
Valence State ◽  
Chemical Resistance ◽  
Diffusion Processes ◽  
Corrosion Behaviour ◽  
Partial Replacement ◽  
Distilled Water ◽  
Corrosion Rates ◽  
Weight Losses ◽  
Diffusion Controlled ◽  
Iron Valence

ABSTRACTThe corrosion behaviour of five TRUW base and reference glasses in distilled water has been investigated for times up to 8 months. The glasses were chosen to evaluate some of the main features of the basaltic slag as produced by the prototype FLK incinerator, i.e. the iron valence state and the relative influence of Al2O3 vs FeOx. Diffusion processes control the corrosion for times below 80 d at 90°C at the SA.V-1 value currently considered (1 cm-1), resulting in the formation of complex films enriched in Al, Fe and Mg over 200 nm thick. The partial replacement of 10 mole 7 Fe2Ox by Al2O3 improves the chemical resistance and strongly accelerates saturation of the leachate for Si, and apparently also for Na and K. The iron valencestate in the glass does not seem to influence the corrosion behaviour. When leaching at temperature up to 200°C, the surfaces of all glasses crystallize, while the corrosion rates do not decrease with time. At SA.V−1 ≠ 0.1 cm−1 , 90°C, the weight losses increase by a factor up to 10 relative to SA.V−1 ≠ 1 cm−1 , 90°C, and the initial diffusion controlled stage might be followed by matrix dissolution reactions.

Valence state analysis of elements by EPMA and its application

1990 ◽  
Vol 48 (2) ◽  
pp. 230-231
Author(s):  
Chen Liqing ◽  
Liu Zuqin ◽  
Zhang Wei
Keyword(s):  
Valence State ◽  
Line Intensities ◽  
Valence States ◽  
Valence Electrons ◽  
Fe And Mn ◽  
Intensity Ratios ◽  
State Analysis

Valence state analyses of Fe and Mn in oxides by EPMA have been reported in literature. In this paper, the effects of valence state on intensity ratios ILα/IKα and ILα/ILβ of Cu, Ni, Co, Fe, Mn, Cr and their oxides, and on intensity ratios ILβ2/ILα1 and ILγ1/ILα1 of Mo, Nb, Zr and their oxides were studied. It was observed that intensity ratios change with valence states in accordance with some regularities, and these effects could be utilized for analyzing the valence states of catalysts.Valence state analysis of elements by EPMA is based on the fact that changes in the states of valence electrons in the outer shells of an atom cause corresponding changes in line intensities. The M electrons of Cu, Ni, Co, Fe, Mn, Cr and the N electrons of Mo, Nb, Zr are valence electrons. Line Kα1,2 and six lines of L are produced from the transitions of K-L2,3 and L-M or L-N respectively.

Dietary Heme Iron does not Prevent Postgastrectomy Anemia but Fructooligosaccharides Improve Bioavailability of Heme Iron in Rats

1999 ◽  
Vol 069 (05) ◽  
pp. 0348-0355 ◽  
Author(s):  
A. Ohta ◽  
K. Sakai ◽  
M. Takasaki ◽  
M. Uehara ◽  
T. Tokunaga ◽  
...  
Keyword(s):  
Heme Iron

Meat and Meat Products Consumption in Italy: Contribution to Trace Elements, Heme Iron and selected B Vitamins supply

2004 ◽  
Vol 74 (4) ◽  
pp. 247-251 ◽  
Author(s):  
Lombardi-Boccia ◽  
Lanzi ◽  
Lucarini ◽  
Di Lullo
Keyword(s):  
Trace Elements ◽  
Daily Intake ◽  
Meat Products ◽  
Heme Iron ◽  
B Vitamins ◽  
Zinc Intake ◽  
Consumption Frequency ◽  
Iron And Zinc ◽  
Iron Heme ◽  
Daily Intakes

This study was undertaken to estimate the contribution of meat and meat products consumption to the daily intakes of trace elements (Fe, Zn, Cu, Se), heme iron, and selected B vitamins (thiamine, riboflavin, niacin) in Italy. Meat and meat products were selected on the basis of their consumption frequency reported by the most recent nationwide dietary individual survey carried out in Italy (INN-CA study). The daily intakes of total iron and heme iron were 1.65 and 1.13 mg/person/day. Zinc intake was 3.65 mg/person/day. Beef made the main contribution to iron, heme iron, and zinc daily intakes. Copper daily intake was 107.3 mug/person/day, with meat products provided the highest contribution (40 mug/person/day). Daily intake of selenium (7.14 mug/person/day) was provided mainly by poultry consumption. Thiamine intake was 228 mug/person/day, and meat products were the main source (110 mug/person/day). Riboflavin intake was 136 mug/person/day, with both beef and meat products as the main contributors (40 mug/person/day). Niacin intake was 7.53 mg/person/day, and poultry was the main source (2.28 mg/person/day). Meat and meat products were a valuable source of micronutrients, supplying 47, 48, and 24% of zinc, niacin, and thiamin daily requirements, respectively, and over 10% of iron, copper, selenium, and riboflavin daily average requirement values of the italian RDAs calculated for the population involved in the survey (INN-CA study).

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