Results 31 to 40 of about 24,708 (261)

Formation and Oxidation of Sulfides on Pure Iron and Iron Oxides

Materials Transactions, JIM, 2000
Formation of pyrophoric iron sulfide (PIS) on the inside-walls of molten sulfur, crude oil or asphalt tanks is the problem to be solved to avoid accidental explosions in petroleum industries. In this study, pure Fe, Fe304 and Fe 2 O 3 were sulfidized in Ar-H2S atmosphere, and the sulfidized products formed were observed and analyzed.
Watanabe, Masatoshi, Sakuma, Minoru, Inaba, Takeshi, Iguchi, Yasutaka   +3 more
openaire   +2 more sources

Effects of Basicity and MgO in Slag on the Behaviors of Smelting Vanadium Titanomagnetite in the Direct Reduction-Electric Furnace Process

Metals, 2016
The effects of basicity and MgO content on reduction behavior and separation of iron and slag during smelting vanadium titanomagnetite by electric furnace were investigated.
Tao Jiang, Shuai Wang, Yufeng Guo, Feng Chen, Fuqiang Zheng   +4 more
doaj   +1 more source

Interaction between Iron-Aluminum Oxides and Organic Carbon in Soils with Different Parent Materials and Its Influence on Heavy Metal Migration

Yankuang ceshi
Iron-aluminum oxides, as significant mineral components, exhibit a notable influence on the organic carbon content in soil. The interaction between these two elements constitutes a crucial aspect of soil environmental processes, particularly in the ...
Yunhong SONG, Kai LIU, Huimin DAI, Fengchao YANG, Zhehuan ZHANG   +4 more
doaj   +1 more source

Interactions of proteins with biogenic iron oxyhydroxides and a new culturing technique to increase biomass yields of neutrophilic, iron-oxidizing bacteria

Frontiers in Microbiology, 2014
Neutrophilic, bacterial iron-oxidation remains one of the least understood biological reactions to date. One of the reasons it remains under-studied is because there are inherent problems with working with iron-oxidizing bacteria (FeOB), including low ...
Roman eBarco, Katrina eEdwards
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Control of arsenic mobilization in paddy soils by manganese and iron oxides

, 2017
Reductive mobilization of arsenic (As) in paddy soils under flooded conditions is an important reason for the relatively high accumulation of As in rice, posing a risk to food safety and human health.
Peng Wang, Wang, P., Chuan Chen, Zhao, F-J., Xiaowei Xu, Fang-Jie Zhao, Ruben Kretzschmar, Xu, X. W., Kretzschmar, R., Chen, C.   +9 more
core   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source

Synthesis, Characterization, and Evaluation of Boron-Doped Iron Oxides for the Photocatalytic Degradation of Atrazine under Visible Light

International Journal of Photoenergy, 2012
Photocatalytic degradation of atrazine by boron-doped iron oxides under visible light irradiation was investigated. In this work, boron-doped goethite and hematite were successfully prepared by sol-gel method with trimethylborate as boron precursor.
Shan Hu, Guanglong Liu, Duanwei Zhu, Chao Chen, Shuijiao Liao   +4 more
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source