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  • 1990-1994  (200)
Collection
Keywords
Publisher
Language
Years
Year
  • 1
    Series available for loan
    Series available for loan
    Magnetostratigraphy of the San Francisco volcanic field, Arizona (1990)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Details Availability
    Call number: SR 90.0001(1929)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: III, 35 S.
    Series Statement: U.S. Geological Survey bulletin 1929
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
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    Unknown
    cDNA cloning and interferon gamma down-regulation of proteasomal subunits X and Y (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-08-26
    Description: Proteasomes are the proteolytic complex responsible for major histocompatibility complex (MHC) class I-restricted antigen presentation. Interferon gamma treatment increases expression MHC-encoded LMP2 and LMP7 subunits of the proteasome and decreases expression of two proteasome subunits, named X and Y, which alters the proteolytic specificity of proteasomes. Molecular cloning of complementary DNAs encoding X and Y showed that their proteins are proteasomal subunits with high amino acid similarity to LMP7 and LMP2, respectively. Thus, interferon gamma may induce subunit replacements of X and Y by LMP7 and LMP2, respectively, producing proteasomes perhaps more appropriate for the immunological processing of endogenous antigens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Akiyama, K -- Yokota, K -- Kagawa, S -- Shimbara, N -- Tamura, T -- Akioka, H -- Nothwang, H G -- Noda, C -- Tanaka, K -- Ichihara, A -- New York, N.Y. -- Science. 1994 Aug 26;265(5176):1231-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Urology, School of Medicine, University of Tokushima, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8066462" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Cloning, Molecular ; *Cysteine Endopeptidases ; DNA, Complementary/genetics ; *Down-Regulation ; Endopeptidases/chemistry/genetics ; Humans ; Interferon-gamma/*pharmacology ; Major Histocompatibility Complex ; Molecular Sequence Data ; *Multienzyme Complexes ; *Proteasome Endopeptidase Complex ; Proteins/chemistry/*genetics/metabolism ; Sequence Homology, Amino Acid ; Tumor Cells, Cultured
    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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  • 3
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    Neuronal mechanisms of object recognition (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-10-29
    Description: Recognition of objects from their visual images is a key function of the primate brain. This recognition is not a template matching between the input image and stored images like the vision in lower animals but is a flexible process in which considerable change in images, resulting from different illumination, viewing angle, and articulation of the object, can be tolerated. Recent experimental findings about the representation of object images in the inferotemporal cortex, a brain structure that is thought to be essential for object vision, are summarized and discussed in relation to the computational frames proposed for object recognition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tanaka, K -- New York, N.Y. -- Science. 1993 Oct 29;262(5134):685-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Information Science Laboratory, Institute of Physical and Chemical Research (RIKEN), Saitama, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8235589" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Mapping/methods ; Cerebral Cortex/anatomy & histology/*physiology ; Form Perception/*physiology ; Macaca ; Visual Pathways/anatomy & histology/*physiology
    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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  • 4
    Electronic Resource
    Electronic Resource
    Valence bands of poly(methylmethacrylate) and photoion emission in vacuum ultraviolet region (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 5423-5428 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Photoion and photoelectron yields were measured for poly(methylmethacrylate) in the photon energy region of 8–40 eV using synchrotron radiation. Further, the valence-band structure was investigated with ultraviolet photoelectron spectra and valence effective Hamiltonian calculations. A significant difference was observed between the photon energy dependencies of photoion and photoelectron yields. The threshold energy for photoion emission was found to be 10.5 eV, while that for photoelectron emission was 8.5 eV, indicating holes created near the valence-band top do not contribute to the ion emission. At the higher-energy region, the ion emission efficiency was found to be enhanced in the photon energy region of 17–28 eV. The difference between the threshold energies of photoion and photoelectron emission and the enhancement of the photoion emission are discussed in conjunction with the valence-band structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351983
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  • 5
    Electronic Resource
    Electronic Resource
    Development of x-ray emission computed tomography for ICF research : Eighth topical conference on high−temperature plasma diagnostics (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 2783-2785 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A computed tomographic (CT) technique has been developed to diagnose laser-irradiated spherical targets using x-ray emissions. The three-dimensional (3-D) x-ray distribution was reconstructed by using an algebraic reconstruction technique (ART) from x-ray pinhole camera images obtained along different sight directions. 3-D distributions of electron temperature and density were measured by use of an absorption filter technique. Time-resolved 3-D x-ray emission images from an imploding hollow shell target were reconstructed with less than 100 ps temporal resolution by using x-ray multiframing cameras.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141830
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  • 6
    Electronic Resource
    Electronic Resource
    Cryostat to provide a solid deuterium layer in a plastic shell for the Gekko XII glass laser system (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3378-3383 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A system to provide a liquid or solid deuterium shell target with a plastic ablator for laser implosion experiments was developed. The system is capable of filling a plastic capsule with deuterium gas of 11 MPa at room temperature at the firing position in the target chamber. Then, the target is cooled down to a cryogenic temperature to form a uniform liquid or solid fuel layer inside without exposing it to the atmosphere. Details of the system, tensile strength of polystyrene shells at low temperature, and the residual vapor pressure in the central void of the target at the laser irradiation are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142555
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  • 7
    Electronic Resource
    Electronic Resource
    Giant photoexpansion in As2S3 glass (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 65 (1994), S. 2925-2927 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: When illuminated with a focused beam from He-Ne lasers, As2S3 films with thickness of ∼50 μm exhibit the thickness expansion reaching to 3 μm, which is approximately 10 times as great as that expected from the conventional photoexpansion phenomenon. The enhancement seems to be caused by photorelaxation of strain generated by photoexpansion. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.112533
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  • 8
    Electronic Resource
    Electronic Resource
    Photoinduced Bragg reflector in As2S3 glass (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 1771-1773 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Bragg reflectors have been fabricated in As2S3 glasses through the photoinduced refractive-index change process. Illumination of single monochromatic beams can produce Bragg reflectors with a half Bragg width of 2 nm in wavelength and the reflectivity estimated from the transmission decrease at 10%–20%. The reflectors can be erased with annealing and polychromatic illumination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111803
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  • 9
    Electronic Resource
    Electronic Resource
    Observation of cavity effect on spontaneous emission lifetime in AlGaAs quantum microcavities using continuous tuning of emission wavelength (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 2944-2946 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cavity effect on spontaneous emission lifetime has been observed through the continuous tuning of the emission wavelength by quantum confined Stark effect in AlGaAs Fabry–Perot microcavities. The obtained emission wavelength dependence of the exciton lifetime shows that the lifetime increases with the emission wavelength, specifically indicating a sharp increase at the cavity resonant wavelength. This behavior agrees well with the theoretical prediction based on the theoretical model of G. Björk, S. Machida, Y. Yamamoto, and K. Igeta [Phys. Rev. A 44, 669 (1991)]. Furthermore, we have also investigated the emission wavelength dependence of the transfer efficiency and obtained good agreement with the theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110280
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  • 10
    Electronic Resource
    Electronic Resource
    A soft x-ray beam line (BL13C) at the Photon Factory with a CEM using undulator radiation : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1363-1366 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A soft x-ray beam line which enables high resolution and high flux at the same time is being developed at the Photon Factory for advanced characterization of new functional materials. The beam line is designed based on a cylindrical element monochromator (CEM) concept using undulator radiation from a 27-pole multipole wiggler/undulator. The photon energy range of the beam line is 200–1000 eV which covers the core-level excitation energy of carbon, nitrogen, and oxygen. Ray tracing simulation shows that the resolving power (λ/Δλ) is over 12 000 at 30 A(ring) with a throughput of 25% when the opening of the exit slit is 10 μm. The beam line will supply x rays which facilitate both x-ray absorption (XAS) and photoelectron (XPS) spectroscopic measurements with extremely high energy resolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143071
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