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  • 1985-1989  (4)
  • energy multiplication  (2)
  • Avian myeloblastosis virus  (1)
  • Monte Carlo calculation  (1)
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Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Nuclear design for a heavy ion-beam fusion reactor, HIBLIC (1985)
    Springer
    Journal of fusion energy 4 (1985), S. 323-338 
    Details
    ISSN: 1572-9591
    Keywords: heavy ion beam ; HIBLIC ; target ; reactor chamber ; beam port ; Monte Carlo method ; activity ; tritium breeding ; energy multiplication ; radiation damage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A nuclear analysis was carried out for a heavy ion-beam fusion reactor, HIBLIC. The analysis includes the target and chamber neutronics, time-dependent radiation damage in the first wall, and radiation streaming through beam ports. It is found that the reactor chamber is characterized by its high tritium breeding ratio, low radiation damage in the second wall, and low induced activity. To reduce the radiation damage in the superconducting, focusing magnets, tapering the beam ports along the direct line-of-sight component of the source neutron is necessary in the magnet regions and also in the collimator region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01058358
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Neutronic optimization for a blanket of the laser fusion reactor, SENRI-I (1985)
    Springer
    Journal of fusion energy 4 (1985), S. 315-319 
    Details
    ISSN: 1572-9591
    Keywords: optimization ; SENRI ; blanket ; tritium ; breeding ; energy multiplication ; molten salt ; nonbreeding ; hybrid ; support ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Neutronic calculations were performed to optimize the SENRI blanket in terms of energy multiplication as well as tritium breeding ratio. The blanket employs a thick (∼ 64-cm) Li layer as breeder/coolant. Three approaches were taken here to achieve the goal: (1) reduction of6Li in the lithium, (ii) replacement of the Li layer by a molten-salt (flibe) layer, and (iii) shipment of excess tritium to a nonbreeding blanket. It was found that the excess tritium produced in the SENRI blanket could be used effectively to obtain additional power by fueling a nonbreeding D-T reactor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01053361
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Nuclear design of a heliotron-H fusion power reactor (1985)
    Springer
    Journal of fusion energy 4 (1985), S. 45-55 
    Details
    ISSN: 1572-9591
    Keywords: heliotron-H ; blanket ; shield ; superconducting magnet ; tritium breeding ratio ; atomic displacement ; dose rate ; shutdown ; Monte Carlo calculation ; THIDA code system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Nuclear analysis was carried out for the heliotron-H fusion power reactor employing anl=2 helical heliotron field. The neutronics aspects examined were (a) tritium breeding capability, (b) shielding effectiveness for the superconducting magnet (SCM), and (c) induced activity after shutdown. In this reactor design of the heliotron-H, the space available for the blanket and shield is limited due to the reactor geometry. Thus, some parametric survey calculations were performed to satisfy the design requirements. The nucleonic design features of the heliotron-H are as follows. An adequate tritium breeding ratio of 1.17 is obtained when a 10-cm thick Pb neutron multiplier and a 40-cm thick Li2O breeding blanket are used. In this case, the total nuclear energy deposition is 16.10 MeV per 14.06 MeV incident neutron. The performance of the SCM is assured during ∼2 yr of continuous operation using a 20-cm thick tungsten shield. Biological dose rate behind the SCM at 1 day after shutdown is too high for hands-on maintenance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01051638
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Antiretroviral activity in a marine red alga: reverse transcriptase inhibition by an aqueous extract of Schizymenia pacifica (1987)
    Springer
    Journal of cancer research and clinical oncology 113 (1987), S. 413-416 
    Details
    ISSN: 1432-1335
    Keywords: Antiretroviral activity ; Marine algae ; Avian myeloblastosis virus ; Reverse transcriptase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An aqueous extract from the marine red alga, Schizymenia pacifica has been tested in a cell free system for its effect on reverse transcriptase from avian retrovirus (avian myeloblastosis virus), and mammalian retrovirus (Rauscher murine leukemia virus). The extract inhibited reverse transcriptase from both these retroviruses but showed almost no effect, if any, on the activity of cellular DNA polymerase alpha and RNA polymerase II in vitro. Consequently it is unlikely to have an adverse effect on the growth of cultured cell. The inhibitory activity of the extract was stable over a relatively wide pH range (pH 1–11) and was not lost after pronase digestion. Inhibitory activity of the extract was lost after boiling at 100°C in 0.67 N HCl, and after treatment with 100 mM NaIO4. The active principle in the extract has an apparent molecular weight in excess of 100 000 daltons. This new reverse transcriptase inhibitor is probably a polysaccharide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390034
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    Paper (German National Licenses)
    Fulltext
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