نتایج جستجو برای: nickel cobalt ferrite

تعداد نتایج: 66681  

Journal: :FEMS microbiology letters 2004
Peter Hebbeln Thomas Eitinger

Nickel/cobalt permeases (NiCoTs, TC 2.A.52) are a rapidly growing family of structurally related membrane transporters whose members are found in Gram-negative and Gram-positive bacteria, in thermoacidophilic archaea, and in fungi. Previous studies have predicted two subclasses represented by HoxN of Ralstonia eutropha, a selective nickel transporter, and by NhlF of Rhodococcus rhodochrous, a n...

اصلی بیکی, باقر, حکیمی, محسن, فقیه, علی, کاملی, پرویز,

In this work, cobalt ferrite nanocrystallites were synthesized by air annealing of milled Co-Fe compound. Effect of annealing temperature on phase formation of cobalt ferrite and structural and magnetic properties of the product was studied. Analysis of annealed sample in 450 oC showed that around 46 weight percent of the specimen was changed to Co2FeO4. This value increased to 95 and 90% for 8...

The particle size distribution of the resultant cobalt ferrite samples was determined from Scanning Electron Microscopy (SEM) images using the granulometry image analysis method. Results showed the nanosized particles of the samples. The X-Ray Diffraction (XRD) patterns of samples were also analyzed by Rietveld refinement method. The results indicated that the precipitated sample at 95 <sup...

2017
Muhammad Idrees Saima Batool

Arsenic is noxious metal exist in water in form of organic dimethyl arsenic acid (C2H7AsO2) and monomethylarsonic acid (CH5AsO3) while in inorganic arsenic trioxide (As2O3) and sodium arsenate (NaH2AsO4). Its trivalent and pentavalent forms are abundant in natural water. Its trivalent form is 60 times more hazardous than pentavalent form. Reports proved that arsenic contamination in water is th...

2013
H. Le Trong

Iron cobaltite powders CoxFe3ÿxO4 (1rxr2.46) were synthesized with compositions in between the cobalt ferrite CoFe2O4 and Co2.46Fe0.54O4. The cationic distribution of pure spinel phases was determined by Mössbauer spectroscopy: as Co content increases in the spinel oxide, Co cations replace Fe cations in the octahedral sites and Co cations migrate from octahedral to tetrahedral sites. Saturatio...

2012
S. J. Lee P. N. Matlage S. H. Song David C. Jiles

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Journal: :Journal of environmental monitoring : JEM 1999
Y Thomassen E Nieboer D Ellingsen S Hetland T Norseth J Ø Odland N Romanova S Chernova V P Tchachtchine

In support of a feasibility study of reproductive and developmental health among females employed in the Monchegorsk (Russia) nickel refinery, personal exposure and biological monitoring assessments were conducted. The inhalable aerosol fraction was measured and characterised by chemical speciation and particle-size distribution measurements. Unexpected findings were that: (i), pyrometallurgica...

2016
Cajetan Ikenna Nlebedim Y. Melikhov David C. Jiles

This study demonstrates the effectiveness of heat treatment in optimizing the magneticproperties of cobalt ferrite, compared to other methods such as cation substitution. It also shows how the magnetic properties of the heat treated cobalt ferrite vary under differenttemperature conditions. Saturation magnetization increased more due to heat treatment than due to Zn-substitution; a cation subst...

Journal: :Contact dermatitis 2010
Jacob Pontoppidan Thyssen Katrine Ross-Hansen Torkil Menné Jeanne Duus Johansen

BACKGROUND Contact allergy epidemics to chromate and nickel were addressed in Denmark in 1983 and 1990 by regulatory interventions. OBJECTIVES To evaluate whether regulatory interventions on nickel and chromate exposure have reduced the proportion of strong patch test reactions. METHODS 22 506 patients with dermatitis aged 4-99 years were patch tested with nickel sulfate, potassium dichroma...

2015
Y. D. Kolekar L. J. Sanchez C. V. Ramana

Articles you may be interested in Impedance spectroscopic characterization of gadolinium substituted cobalt ferrite ceramics Correlation between structural, magnetic, and dielectric properties of manganese substituted cobalt ferrite Influence of manganese substitution on the microstructure and magnetostrictive properties of Co1−xMnxFe2O4 (x=0.0–0.4) ferrite Enhanced reflection loss characterist...

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