نتایج جستجو برای: fe b

تعداد نتایج: 968369  

Journal: :Dalton transactions 2012
Joseph Ponniah S Shubhankar Kumar Bose Sundargopal Ghosh

A metallaborane of novel structure, [(Cp*Mo)(2)B(3)H(3)Se(2){Fe(CO)(2)}(2){Fe(CO)(3)}(2)] (2; Cp* = η(5)-C(5)Me(5)), with tetracapped pentagonal bipyramidal geometry, isolated from the reaction of [(Cp*Mo)(2)B(4)H(4)Se(2)], 1 with [Fe(2)(CO)(9)]; the title compound exhibit an 11-vertex closo-cage geometry, having eight skeletal electron pairs (sep) and 98 valence electrons, appropriate for its ...

Journal: :Journal of the Japan Institute of Metals and Materials 1994

2003
W Liu Z D Zhang

The structural and magnetic properties of rare-earth nanocomposite magnets of a (Nd,Dy)(Fe,Co,Nb,B)5.5 single layer and a (Nd,Dy)(Fe,Co,Nb,B)5.5/α-Fe multilayer prepared by sputtering and heat treatment have been investigated. Incomplete exchange coupling behaviour is observed in the Ti-buffered NdDyFeCoNbB + 40 wt%Fe single layer magnet. After annealing, the laminated nanostructure consisting ...

2016
Nguyen Van Thang Niels Harmen van Dijk Ekkes Brück

The influence of Co (Ni) and B co-doping on the structural, magnetic and magnetocaloric properties of (Mn,Fe) 2 (P,Si) compounds is investigated by X-ray diffraction (XRD), differential scanning calorimetry, magnetic and direct temperature change measurements. It is found that Co (Ni) and B co-doping is an effective approach to tune both the Curie temperature and the thermal hysteresis of (Mn,F...

2010
T. J. BURCH V. NICULESCU

The Mossbauer spectra of Fe in Fe3 _ xVx Si alloys for 0.,;; x";; I shows that V occupies almost exclusively one of two Fe sites (the B site). As x increases the spectra of Fe on the other site (the A, C site) becomes increasingly complex as the number of their V 1st neighbors increases. Simulated Mossbauer spectra were calculated using moments obtained by a simple model from bulk magnetization...

Journal: :Journal of the American Chemical Society 2005
Brad S Pierce Michael P Hendrich

Each beta-protomer of the small betabeta subunit of Escherichia coli ribonucleotide reductase (R2) contains a binuclear iron cluster with inequivalent binding sites: Fe(A) and Fe(B). In anaerobic Fe(II) titrations of apoprotein under standard buffer conditions, we show that the majority of the protein binds only one Fe(II) atom per betabeta subunit. Additional iron occupation can be achieved up...

Journal: :Revista clinica espanola 2014
M H Vicco F Ferini L Rodeles M Baretta I Marcipar O A Bottasso

a Laboratorio de Tecnología Inmunológica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Ciudad Universitaria, Paraje ‘‘El Pozo’’, Santa Fe, CP: 3000, Argentina b Servicio de Clínica Médica, Hospital J.B ‘‘Iturraspe’’, Bv. Pellegrini 3551, Santa Fe, CP: 3000, Argentina c Instituto de Inmunología, Facultad de Medicina, Universidad Nacional de Rosario, Santa Fe 31...

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