نتایج جستجو برای: fe cr c

تعداد نتایج: 1155873  

2002
Carmen M. Barnés Elizabeth C. Theil Kenneth N. Raymond

Ferritin concentrates iron as a hydrous ferric oxide in a protein cavity (8 nm in diameter) by using eight pores along the threefold symmetry axes of the octahedral supramolecular structure. The role of ligand exchange in the entry of Fe(II) hexahydrate into ferritin protein has been studied with [Cr(TREN)(H2O)(OH)] [TREN N(CH2CH2NH2)3], a model for Fe(H2O)6 with only two exchangeable ligands. ...

Journal: :Journal of hazardous materials 2009
Shan-Li Wang Chung-Chi Chen Yu-Min Tzou Chia-Lian Hsu Jen-Hshuan Chen Chen-Fang Lin

The mechanisms of photo-catalytic reduction of Cr(VI) were investigated in acidic solutions with and without Fe(III). In a system without Fe(III), no Cr(VI) reduction was observed in dark conditions; conversely, under light conditions, the reduction reaction rate increased to 0.011 and 0.020microM min(-1) at pH 2 and pH 1, respectively, indicating the occurrence of Cr(VI) photo-reduction. The C...

2009
Beatrice Bocca Stefano Caimi Oreste Senofonte Francesco Petrucci Roberta Feliciani Maria Rosaria Milana Barbara De Berardis Luigi Paoletti Giovanni Forte

Metallic piercing which have lack of resistance to sweat corrosion might be able to release metallic ions in the local tissue producing adverse effects in the human body, including allergic contact dermatitis (ACD). The aim of this study was double: 1) the metallic characterization of piercings and 2) the release of metals (Al, Co, Cr, Cu, Fe, Ir, Mn, Ni, Pd, Pt, Rh, Ti, V and Zn) in artificial...

Journal: :Journal of Experimental and Theoretical Physics Letters 2004

Journal: :Archives of Foundry Engineering 2016

Journal: :Metals 2021

In this study, the efficacy of an innovative ultra-fast sintering technique called electro-sinter-forging (ESF) was evaluated in densification Fe-Cr-C steel. Although ESF proved to be effective densifying several different metallic materials and composites, it has not yet been applied powder metallurgy steels. Pre-alloyed Astaloy CrM powders have ad-mixed with either graphite or graphene then p...

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