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  • American Institute of Physics (AIP)  (1)
  • Springer  (1)
  • International Union of Crystallography
  • Springer Nature
  • 1985-1989  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Abnormal solid solution and activation behavior in Ga-implanted Si(100) (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 2037-2039 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Rapid thermal annealing (RTA) and furnace annealing of Ga-implanted Si were studied. Ga atoms implanted into Si are located on substitutional lattice sites in concentration above the solid solubility limit after short-time and low-temperature annealing. Low-resistivity shallow p+ junctions can be fabricated using this metastable layer. However, precipitation and redistribution of the Ga atoms were observed after high-temperature or longer time annealing. Shallow p+ junctions fabricated by Ga implantation and RTA are suitable for submicron complementary-metal-oxide-semiconductor devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98284
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  • 2
    Electronic Resource
    Electronic Resource
    Nucleotide composition and kinetic complexity of the genomic DNA of an intracellular symbiont in the pea aphidAcyrthosiphon pisum (1987)
    Springer
    Journal of molecular evolution 24 (1987), S. 205-211 
    Details
    ISSN: 1432-1432
    Keywords: Endosymbiont ; Aphid ; Genome size ; Nucleotide composition ; Cell organelle ; Mycoplasma ; Escherichia coli
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An intracellular symbiont was isolated from the mycetocyte of the pea aphidAcyrthosiphon pisum, and its genomic DNA was compared with those ofEscherichia coli andMycoplasma capricolum with respect to nucleotide composition and kinetic complexity. Thermal dissociation, CsCl density equilibrium centrifugation, and high-performance liquid chromatography of the nuclease P1 digest all indicated that the G+C content of the endosymbiont DNA is as low as 30%. In this respect, the endosymbiont resembledMycoplasma species. The reassociation kinetics of genomic DNA labeled by nick translation suggested that the endosymbiont genome is 1.4×1010 daltons in size, about 5 and 18 times as large as those ofE. coli andM. capricolum, respectively. The results were confirmed by reassociation of endosymbiont DNA labeled by incubation with [3Hthymidine in Grace's medium. The endosymbiont genome of the aphid was about 500 times larger than those of leafhopper endosymbionts previously analyzed by ultracentrifugation. These characteristic properties of the aphid endosymbiont genome are discussed in connection with the evolution of cell organelles, and with reference to a previous finding that most of the genes of the aphid endosymbiont are not expressed when present intracellularly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02111233
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    Paper (German National Licenses)
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