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  • Articles  (3)
  • NiFe2O4  (2)
  • Female
  • 1995-1999  (3)
  • Chemistry and Pharmacology  (3)
  • Natural Sciences in General  (1)
  • Mathematics
  • 1
    Electronic Resource
    Electronic Resource
    Nickel ferrite as inert anodes in aluminium electrolysis: Part I Material fabrication and preliminary testing (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 293-299 
    Details
    ISSN: 1572-8838
    Keywords: aluminium ; cermet ; electrode ; electrolysis ; inert ; NiFe2O4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Dense, sintered samples of nickel ferrite/nickel oxide–copper cermets were produced and characterized. Three compositions were chosen, each with different NiO content. A new method of powder preparation involving no use of water as dispersant resulted in a well-dispersed ceramic phase with smaller metal grains than previously reported. The individual phases in the cermets were analysed quantitatively using energy-dispersive X-ray microanalysis, and significant differences between the materials were found. The electrical conductivity of the materials was measured, showing interesting properties not previously described. Reaction sintering was tried and found to lead to a microstructure different from that obtained with pre-calcined powder. The nickel contamination level in the electrolyte did not reach steady state after 4h of electrolysis. Iron and copper did seem to reach steady state after some irregular behaviour early in the tests. The total contamination level of anode constituents in the deposited metal was as low as 0.116wt%. These encouraging results seemed to be partly related to the cell configuration giving very slow mass transfer from the electrolyte into the metal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003460220418
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nickel ferrite as inert anodes in aluminium electrolysis: Part II Material performance and long-term testing (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 301-311 
    Details
    ISSN: 1572-8838
    Keywords: aluminium ; cermet ; electrode ; electrolysis ; inert ; NiFe2O4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The behaviour of three different compositions based on nickel ferrite–nickel oxide–copper cermets was investigated as anode materials in laboratory electrolysis tests for 50h in a conventional cryolite-based electrolyte. The corrosion of the anodes was assumed to be mass transfer controlled and the transfer of impurities into the electrolyte and subsequently into the cathodically deposited metal was studied. The results indicate that the materials corroded in a controlled manner. Mass transfer coefficients of species from the anode to the electrolyte were of the order of 10−4ms−1 while the mass transfer coefficients for transfer of the species from the electrolyte into the deposited metal were of the order of 10−6ms−1. Nickel exhibited significantly lower mass transfer coefficients than those of iron and copper. The extrapolated corrosion rates of the anode ranged 1.2–2.0 cm year−1, which is acceptable from an industrial perspective. The contamination of the deposited aluminium with respect to Ni and Cu was, however, too high to meet current specifications for commercial grade metal. Post-electrolysis examination of the anodes showed that a reaction layer of approximately 50μm thickness was formed on the anodes. This layer did not contain any metal grains and seemed to prevent preferential corrosion of the metal phase in the underlying cermet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003464304488
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  • 3
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    Altered growth and branching patterns in synpolydactyly caused by mutations in HOXD13 (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-04-26
    Description: Hox genes regulate patterning during limb development. It is believed that they function in the determination of the timing and extent of local growth rates. Here, it is demonstrated that synpolydactyly, an inherited human abnormality of the hands and feet, is caused by expansions of a polyalanine stretch in the amino-terminal region of HOXD13. The homozygous phenotype includes the transformation of metacarpal and metatarsal bones to short carpal- and tarsal-like bones. The mutations identify the polyalanine stretch outside of the DNA binding domain of HOXD13 as a region necessary for proper protein function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Muragaki, Y -- Mundlos, S -- Upton, J -- Olsen, B R -- AR36819/AR/NIAMS NIH HHS/ -- AR36820/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Apr 26;272(5261):548-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8614804" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Chromosome Mapping ; Chromosomes, Human, Pair 2 ; Cloning, Molecular ; Female ; Fingers/*abnormalities/embryology ; *Genes, Homeobox ; Genetic Linkage ; Homeodomain Proteins/chemistry/*genetics/physiology ; Humans ; Male ; Molecular Sequence Data ; Morphogenesis ; Multigene Family ; Mutation ; Pedigree ; Peptides/chemistry ; Polydactyly/embryology/*genetics/radiography ; Polymerase Chain Reaction ; Syndactyly/embryology/*genetics/radiography ; Toes/*abnormalities/embryology ; *Transcription Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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