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  • Aerospace Medicine  (1)
  • Atomic and molecular processes in external fields, including interactions with strong fields and short pulses  (1)
  • DNA bending  (1)
  • 1
    Electronic Resource
    Electronic Resource
    DNA binding and bending by a chloroplast-encoded HU-like protein overexpressed in Escherichia coli (1997)
    Springer
    Plant molecular biology 34 (1997), S. 339-343 
    Details
    ISSN: 1573-5028
    Keywords: chloroplast ; DNA bending ; DNA binding ; HU-like protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Guillardia theta chloroplast hlpA gene encodes a protein resembling bacterial histone-like protein HU. This gene was cloned and overexpressed in Escherichia coli cells, and the resulting protein product, HlpA, was purified and characterized in vitro. In addition to exhibiting a general DNA-binding activity, the chloroplast HlpA protein also strongly facilitated cyclization of a short DNA fragment in the presence of T4 DNA ligase, indicating its ability to mediate very tight DNA curvatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005867215258
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Tunneling electron recaptured by an atomic ion or a molecular ion (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-12-14
    Description: Author(s): Xiguo Xie, Cong Wu, Hong Liu, Min Li, Yongkai Deng, Yunquan Liu, Qihuang Gong, and Chengyin Wu Dissociative ionization of N 2 Ar was experimentally studied in an intense femtosecond laser field. The break of the weak van der Waals bond generates an argon atomic ion and a nitrogen molecular ion. Both of them can recapture the tunneling electron. The probability measurement indicates that the tun... [Phys. Rev. A 88, 065401] Published Fri Dec 13, 2013
    Keywords: Atomic and molecular processes in external fields, including interactions with strong fields and short pulses
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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    PAPER CURRENT
  • 3
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    Risk of Skin Cancer from Space Radiation (2003)
    In:  CASI
    Details
    Publication Date: 2018-06-11
    Description: We review the methods for estimating the probability of increased incidence of skin cancers from space radiation exposure, and describe some of the individual factors that may contribute to risk projection models, including skin pigment, and synergistic effects of combined ionizing and UV exposure. The steep dose gradients from trapped electrons, protons, and heavy ions radiation during EVA and limitations in EVA dosimetry are important factors for projecting skin cancer risk of astronauts. We estimate that the probability of increased skin cancer risk varies more than 10-fold for individual astronauts and that the risk of skin cancer could exceed 1 % for future lunar base operations for astronauts with light skin color and hair. Limitations in physical dosimetry in estimating the distribution of dose at the skin suggest that new biodosimetry methods be developed for responding to accidental overexposure of the skin during future space missions.
    Keywords: Aerospace Medicine
    Type: Radiation Protection Studies of International Space Station Extravehicular Activity Space Suits; See also Doc ID 20040031719; 171-176; NASA/TP-2003-212051
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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