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  • 1990-1994  (2)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 631-632 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have constructed a very compact 350-keV injector for a triton accelerator. Because of restrictive boundaries, the whole system has been optimized: for example, a disktron for the high-voltage power supply, a highly efficient gas recycling system on a platform, and an insulating cooling system. In the first step, the injector was operated with a duoplasmatron ion source. In test runs, the injector was charged up to 330 kV without any problems. To date, the injector has been used to accelerate hydrogen beam currents of ∼0.2 to 0.4 mA.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Triploidy was induced in three full-sib families of sea bream, Pagrus major (Temminck & Schlegel), by subjecting the fertilized eggs to cold-shock treatment at 0°C for a 12 min duration, starting 3 min after insemination. Results showed that this treatment gave 100% triploid fish with reasonable survival rates of more than 61% up to first feeding, Triploidy induction was proved by the use of allozyme markers at three (ADH*, EST* and 6PGD*) loci and red blood cell size analysis.At 2 months of age, the survival of the triploid group was lower than that of the diploids but it was comparable at 10 months. No differences in growth rate between diploid and triploid full-sibs were observed up to the age of 10 months. However, differences in body weight between families were noticed both in diploid and triploid groups when cultured in the same net cage. This possibly suggests a high heritability for the trait examined in the broodstock. The gonads of the triploid fish were significantly smaller than those of the diploids, Histological analysis of the gonads revealed sterility in triploid fish.
    Type of Medium: Electronic Resource
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