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  • 1
    Electronic Resource
    Electronic Resource
    Coexistence of ferroelectricity and ferromagnetism in BiFeO3–BaTiO3 thin films at room temperature (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 555-557 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: (Bi0.7Ba0.3) (Fe0.7Ti0.3)O3 films have been constructed on Nb-doped SrTiO3 (100) by the pulsed-laser deposition technique, and their physical properties have been examined. The films exhibit both ferroelectricity and ferromagnetism (weak ferromagnetism) with Pr=2.5 μC/cm2 and Mr=0.2 emu/g at room temperature. The film-thickness dependence of their magnetic and electric properties (size effect) is also discussed simultaneously. The dielectric constants of the films decrease with reducing film thickness below 1000 Å. The magnetic Curie temperature of the films, on the other hand, does not change at all down to 250 Å. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124420
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  • 2
    Electronic Resource
    Electronic Resource
    NACP/α-synuclein immunoreactivity in fibrillary components of neuronal and oligodendroglial cytoplasmic inclusions in the pontine nuclei in multiple system atrophy (1998)
    Springer
    Acta neuropathologica 96 (1998), S. 439-444 
    Details
    ISSN: 1432-0533
    Keywords: Key words NACP ; Synuclein ; Multiple system ; atrophy ; Neuronal cytoplasmic inclusions ; Glial ; cytoplasmic inclusions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We examined neuronal cytoplasmic inclusions (NCIs) and oligodendrocytic glial cytoplasmic inclusions (GCIs) in the pontine nuclei in multiple system atrophy (MSA) using antibodies against the non-amyloid β component of Alzheimer’s disease amyloid precursor protein (NACP/α-synuclein). Our immunohistochemical study revealed that anti-NACP antibodies labeled both NCIs and GCIs. Immunoelectron microscopy showed that positive reaction products were localized on the 15- to 30-nm-thick filamentous components of NCIs and GCIs. The present study demonstrates that NACP is associated with cytoplasmic inclusions of MSA, and suggests a role of NACP in abnormal filament aggregation in neuronal degeneration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004010050917
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  • 3
    Electronic Resource
    Electronic Resource
    A novel histone variant localized in nucleoli of higher plant cells (1999)
    Springer
    Chromosoma 108 (1999), S. 190-199 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract.  Immunofluorescence staining with antisera raised against p35, a basic nuclear protein that accumulates in the pollen nuclei of Lilium longiflorum, specifically stained the nucleoli in interphase nuclei of somatic tissues, including root and leaf, and in pachytene nuclei during meiotic division, whereas antisera raised against histone H1 uniformly stained the entire chromatin domain with the exception of the nucleoli in these nuclei. Further, p35-specific antisera stained the nucleoli in root and leaf nuclei of the monocotyledonous plants Tulipa gesneriana, Allium cepa and Triticum aestivum and of the dicotyledonous plants Vicia faba and Nicotiana tabacum. Thus, these novel antisera stained the nucleoli in cells of all higher plants examined, although the staining patterns within nucleoli were somewhat different among plant species and tissues. The full-length cDNA of p35 was cloned on the basis of the partial amino acid sequence. The deduced amino acid composition and amino acid sequence of p35 indicate that this nucleolar protein is a novel variant of histone Hl. Further, p35 was strongly bound to ribosomal DNA in vitro. The results of immunoblotting of histones extracted from each tissue of the various plant species with the nucleolus-specific antibodies also suggested the conservation of similar epitope(s) in both mono- and dicotyledonous plants. From these results, it is suggested that similar variants of histone Hl are specifically distributed in the nucleoli of all plant species and help to organize the nucleolar chromatin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004120050368
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  • 4
    Electronic Resource
    Electronic Resource
    Male gametic nucleus-specific H2B and H3 histones, designated gH2B and gH3, in Lilium longiflorum (1995)
    Springer
    Planta 197 (1995), S. 289-295 
    Details
    ISSN: 1432-2048
    Keywords: Chromatin ; Generative nucleus ; Histone variants ; Immunofluorescence ; Lilium ; Pollen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two proteins that resemble core histones and might be specific to the male gametic (generative) nucleus within the pollen of Lilium longiflorum Thumb, (originally designated p22.5 and p18.5; K. Ueda and I. Tanaka, 1994, Planta, 192, 446–452) were characterized biochemically and immunochemically. Patterns of digestion of p22.5 and p18.5 by Staphylococcus aureus V8 protease closely resembled those of somatic histones H2B and H3, respectively. However, peptide fragments that were unique to p22.5 or p18.5 were also detected. Antibodies raised against these proteins did not cross-react with any somatic histones. These results indicate that p22.5 and p18.5 are different from somatic histones in terms of primary structure. Analysis of their amino-acid compositions revealed that p22.5 is a moderately lysine-rich protein while p18.5 is an arginine-rich protein. From these results, we conclude that p22.5 is a variant of histone H2B and p18.5 is a variant of histone H3. Immunofluorescence staining of pollen grains using the specific antibodies revealed that both p22.5 and p18.5 are only present in the generative cell nucleus and are not to be found in the vegetative cell nucleus. This study demonstrates that (i) specific histone variants are present in the male gametic nucleus of a higher plant, as they are in the sperm nucleus of animals, and (ii) distinct differences in histone composition exist between the nuclei of generative and vegetative cells in pollen. These novel histones (p22.5 and p18.5), specific to male gametic nuclei, have been designated gH2B and gH3, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00202649
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