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  • 1
    Electronic Resource
    Electronic Resource
    Isolation, culture and cell-type identification of adult human pituitary cells (1985)
    Springer
    Acta neuropathologica 68 (1985), S. 205-208 
    Details
    ISSN: 1432-0533
    Keywords: Human pituitary gland ; Tissue culture ; Density gradients ; Immunocytochemistry ; Growth hormone ; Prolactin ; Adrenocorticotropin ; Follicle-stimulating hormone ; Luteinizing hormone ; Thyrotropin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Pituitary cells were isolated from adult human pituitary glands obtained at autopsy 4–12 h postmortem by enzyme treatment (collagenase and dispase) and by Percoll density gradients. Cells thus isolated were maintained in culture for more than 6 months. By immunoperoxidase staining methods using rabbit sera monospecific against various pituitary hormones, a large number of cultured cells reacted positively. The hormones identified in these cells were growth hormone, prolactin, adrenocorticotropin, follicle-stimulting hormone, luteinizing hormone and thyrotropin. Electron-microscopic examination of cultured cells revealed the presence of secretory granules in cytoplasm characteristic of in vivo human pituitary cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690196
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  • 2
    Electronic Resource
    Electronic Resource
    Long-term cultures of human adult Schwann cells isolated from autopsy materials (1984)
    Springer
    Acta neuropathologica 64 (1984), S. 15-21 
    Details
    ISSN: 1432-0533
    Keywords: Autopsy ; Human ; Morphology ; Glial growth factor ; Schwann cells ; Tissue culture ; Trigeminal ganglion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Enriched populations of adult human Schwann cells were otained from trigeminal ganglia and roots of autopsy material. The cells, isolated by enzymatic procedure, were seeded on rat tail collagencoated coverslips. Subcultures were established several weeks later, and secondary cells were grown on polylysine-coated coverslips and maintained in vitro for as long as 5 months. The Schwann cells in culture displayed the same light- and electron-microscopic features and arrangement as those cells observed in vivo. The addition of bovine pituitary glial growth factor in the medium induced a 3–5-fold increase in Schwann cell division.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695601
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  • 3
    Electronic Resource
    Electronic Resource
    Culture and cryopreservation of adult human oligodendrocytes and astrocytes (1984)
    Springer
    Acta neuropathologica 64 (1984), S. 172-175 
    Details
    ISSN: 1432-0533
    Keywords: Adult human ; Oligodendrocyte ; Astrocyte ; Tissue culture ; Cryopreservation ; Bulk isolation ; Immunofluorescence microscopy ; Cell type-specific markers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Human adult oligodendrocytes were bulkisolated from the brains obtained at autopsy by the Percoll density gradient method and cultured in vitro for 2–28 days. Cultured human oligodendrocytes were then scraped from the dishes or coverslips, frozen at −70°C in the presence of 10% dimethyl sulfoxide as a cryoprotectorant, and then stored in liquid nitrogen tank. After the fast thawing, 55%–70% of human oligodendrocytes plus astrocytes were found to survive in the culture. Identification of cell types was established by using antibodies directed against galactocerebroside (oligodendrocyte) and glial fibrillary acidic protein (astrocyte).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695582
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  • 4
    Electronic Resource
    Electronic Resource
    210Pb-derived sediment accumulation rates in the southwestern East Sea (Sea of Japan) (1997)
    Springer
    Geo-marine letters 17 (1997), S. 126-132 
    Details
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Recent sediment accumulation rates are 18–230 mg cm-2 yr-1 (0.02–0.2 cm yr-1) based on excess 210Pb activity profiles in the southwestern part of the East Sea (Sea of Japan). Assuming no mixing beneath surface mixed layers, 210Pb-derived sediment accumulation rates are 18–32 mg cm-2 yr-1 in the northern part of the Yamato Ridge and the Ulleung Basin, 29–136 mg cm-2 yr-1 in the Korea Plateau, and 230 mg cm-2 yr-1 in the southern shelf. These values generally agree with long-term sedimentation rates estimated from dated ash layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003670050017
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  • 5
    Electronic Resource
    Electronic Resource
    Annular dark field electron microscope images with better than 2 A(ring) resolution at 100 kV (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 2456-2458 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-resolution scanning transmission electron microscope (STEM) images in the annular dark field (ADF) imaging mode approaching the theoretical point-to-point resolution limit are presented. The ADF images were obtained from a high Tc superconducting YBa2Cu3O7−x thin-film specimen at 100 kV. The 1.9 A(ring) resolution lattice image, which is the smallest lattice spacing in the specimen, corresponds to the minimum resolvable spatial frequency with 5% contrast in the contrast transfer function for annular dark field, and is smaller than the resolution limit given by the Rayleigh criterion. This demonstrates that STEM ADF imaging can have a resolution approximately 40% better than that of the bright field conventional transmission electron microscope (CTEM) imaging at Scherzer condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102297
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  • 6
    Electronic Resource
    Electronic Resource
    Dependence of giant magnetoresistance in Co/Cu multilayers on the thickness of the Co layers : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6507-6509 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dependence of the giant magnetoresistance (GMR) on the thickness of the Co layers in Co/Cu multilayers was investigated experimentally. The thickness of the Cu layer was held constant at tCu=19 A(ring), which corresponds to the second maximum of the GMR ratio oscillating dependence on tCu. The Co layer thickness was varied from 4.8 to 79.0 A(ring). High resolution transmission electron microscopy showed the existence of the two-dimensional artificial superstructure with defined periodicity as well as sharp and flat interfaces. From wide angle x-ray diffraction it was concluded that at Co layer thickness below 40 A(ring) the multilayers are polycrystalline with mainly fcc lattice structure and (111) texture. In the case of thicker Co layers indications of hcp Co could be found. The GMR ratio reaches a maximum at Co layer thickness about 11 A(ring). It was shown that the GMR in sputtered Co/Cu multilayers is due to spin scattering at the interfaces and resistance is strongly influenced by interface scattering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358244
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  • 7
    Electronic Resource
    Electronic Resource
    Limitations on the critical current density in Bi2Sr2CaCu2O8 films grown on MgO(001) by metalorganic deposition (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 2356-2362 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A systematic study has been carried out in order to elucidate the mechanisms for low critical current densities in superconducting oxide films prepared by metalorganic deposition. Bi2Sr2CaCu2O8 films grown on MgO(001) have stoichiometric composition and exhibit limited interfacial reaction with the underlying substrates. The films have a low content of carbon and the grain boundaries are mostly clean. Rocking curve analysis shows a narrow peak, while pole figure measurements indicate a strong mosaic pattern. The films exhibit a low critical current density and the magnetic susceptibility versus temperature has a high field dependence. A substantial increase in critical current densities can be achieved when the orientations of Bi2Sr2CaCu2O8 crystallites in the a-b plane are improved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351089
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  • 8
    Electronic Resource
    Electronic Resource
    GaN metal–oxide–semiconductor structures using Ga-oxide dielectrics formed by photoelectrochemical oxidation (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 446-448 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: GaN metal–oxide–semiconductor (MOS) capacitors were fabricated by using Ga oxide formed by photoelectrochemical oxidation of GaN. The electrical properties of the MOS structures as characterized by capacitance–voltage measurement were found to be dependent on the oxidation time and posttreatment. Positive flatband voltage was observed in devices with thin oxide layers indicating the existence of negative oxide charge. Very thin oxide exhibits high capacitance and reverse leakage, which can be reduced by rapid thermal annealing (RTA). Passivation of the interface by RTA is partially responsible for the improvement. Thicker oxide layers exhibit improved electrical properties. Low density of interface states (∼1011 eV−1 cm−2) was obtained in the Ga-oxide/GaN structure grown under optimized conditions. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1436279
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  • 9
    Electronic Resource
    Electronic Resource
    Clean grain boundaries and weak links in high Tc superconducting YBa2Cu3O7−x thin films (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 508-510 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is demonstrated that polycrystalline thin films of high Tc superconducting YBa2Cu3O7−x can be grown with clean grain boundaries, i.e., without a boundary layer of segregation or different phase. In clean stoichiometric samples, angular misorientations of grains may be the origin of weak link behavior. High-resolution scanning transmission electron microscope images of films grown on ZrO2 and MgO by reactive evaporation, reactive sputtering, and laser ablation show atomic lattice images of clean grain boundaries. X-ray microanalysis with a 10 A(ring) spatial resolution also indicates no composition deviation at the grain boundaries. Grain sizes and epitaxial relations of samples prepared by different methods are characterized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104242
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  • 10
    Electronic Resource
    Electronic Resource
    Scaling behavior of YBa2Cu3O7−δ thin-film weak links (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 1155-1157 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The superconductive weak link properties of microbridges formed in c-axis normal YBa2Cu3O7−δ polycrystalline thin films containing a variable amount of large angle tilt boundaries have been studied. In the low critical current density limit these weak links have current-voltage (I-V) characteristics that are accurately modeled by the resistively shunted junction model. The I-V's are found to accurately follow a simple scaling law with the product of the critical current and weak link resistance Rn varying linearly with the weak link conductance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104223
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