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  • Analytical Chemistry and Spectroscopy  (2)
  • *Transcriptional Activation  (1)
  • 21.10.Ft  (1)
  • 1990-1994  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Hybridized bands and parity splitting in the odd-odd nucleus220Ac (1991)
    Springer
    The European physical journal 339 (1991), S. 325-334 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ft ; 23.20.Lv ; 27.90.+b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The high spin state structure of the nucleus220Ac was investigated by means of the209Bi(14C, 3n) reaction. In beamγ ray spectroscopy was carried out using the Château de Cristal multidetector array. Gamma ray multipolarities were established by extracting directional correlation ratios from the Ge—Ge coincidence data and by intensity balance considerations. The level scheme, established up to 18 ħ above the lowest observed state, consists of three alternating parity bands. The data are interpreted in terms of the reflection asymmetric shapes of the nucleus. The analysis of the parity doublet candidates does not show the decrease of the parity splitting predicted for an odd-odd nucleus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560633
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of trace elements in aluminium with synchrotron radiation-induced x-ray fluorescence (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 20 (1991), S. 293-295 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A systematic study of trace elements in aluminium has been undertaken. Calibration graphs and detection limits were deduced for various excitation energies.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300200609
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Synchrotron x-ray fluorescence analysis of heavy trace elements in light silicate mineralsPresented at the European Conference on EDXRS, Myconos, Greece, 30 May-6 June 1992. (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 22 (1993), S. 248-251 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A description is presented of fluorescence spectrometric experiments using synchrotron radiation and an energydispersive detection system performed at the LURE (DCI storage ring) where a study of geological materials is under development. Early results obtained for natural lithium aluminosilicates (lepidolites) from pegmatite formations in northern Portugal are discused. Data handling and processing (deconvolution of the complex spectral lines, deduction of continuous background and peak area calculation) are briefly described. Some heavy trace elements previously unreported for these lepidolites (TI, W, Ta, Nb) and one geochemically relevant sub-trace metal (Au) were detected. The analytical efficiencies of three excitation energies (6, 13 and 19 keV) are compared. The difficulities and drawbacks versus advantages of this techique for the assessment of trace and sub-trace elements in geological samples are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300220414
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  • 4
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    Unknown
    Implication of GAP in Ras-dependent transactivation of a polyoma enhancer sequence (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-05-08
    Description: Controversy exists as to whether the interaction of a guanosine triphosphatase activating protein (GAP) with Ras proteins functions both to initiate and to terminate Ras-dependent signaling events or only to terminate them. GAP-C, a carboxyl-terminal fragment of GAP that is sufficient to stimulate GTPase activity, inhibited the stimulation of transcription produced by some oncoproteins (v-Src, polyoma middle T, wild-type Ras, and oncogenic Ras) but not that produced by v-Mos. Wild-type GAP did not affect transcription induced by oncogenic Ras but reversed the inhibitory effect of GAP-C on transcription induced by oncogenic Ras. These results indicate that GAP is a negative regulator of wild-type Ras and elicits a downstream signal by interacting with Ras-GTP (guanosine triphosphate).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schweighoffer, F -- Barlat, I -- Chevallier-Multon, M C -- Tocque, B -- New York, N.Y. -- Science. 1992 May 8;256(5058):825-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rhone-Poulenc Rorer, Centre de Recherche de Vitry-Alfortville, Vitry Sur Seine.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1317056" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Antigens, Polyomavirus Transforming/genetics ; CHO Cells ; *Cell Cycle Proteins ; *Cell Transformation, Neoplastic ; Chloramphenicol O-Acetyltransferase/genetics/metabolism ; Cricetinae ; *Enhancer Elements, Genetic ; Fungal Proteins/genetics/metabolism ; GTPase-Activating Proteins ; *Genes, ras ; Humans ; Mice ; Oncogene Proteins v-mos ; Oncogenes ; Polyomavirus/*genetics ; Promoter Regions, Genetic ; Protein-Tyrosine Kinases/genetics ; Proteins/*metabolism ; Retroviridae Proteins, Oncogenic/genetics ; Signal Transduction ; Simian virus 40/genetics ; Transcription, Genetic ; *Transcriptional Activation ; Transfection ; ras GTPase-Activating Proteins ; *ras-GRF1
    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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