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  • J NO 2  (2)
  • Protoplasts  (1)
  • AIRCRAFT INSTRUMENTATION
  • Springer  (3)
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  • Springer  (3)
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  • 1
    ISSN: 1432-0983
    Keywords: RFLP ; Tomato ; Plastid ; Mitochondria ; Protoplasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Restriction fragment length polymorphisms (RFLPs) were used to determine the transmission of organelle genomes in somatic hybrid plants of tomato and its wild relativeSolanum lycopersicoides. Biased frequencies of organelle combinations were observed in a population of 70 somatic hybrid plants each derived from a separate callus. The plastids in 68 of 70 hybrids examined were fromL. esculentum. One of the remaining hybrids, plant 240, hadS. lycopersicoides plastids and the other, plant 63, had a mixture of parental plastids. Forty-six of the same 70 plants were analyzed for mtDNA and all had that ofS. lycopersicoides including plant 240. One of these hybrids had novel mtDNA fragments which mayhave resulted from recombination or rearrangement. The biased transmission may have resulted from an initial unequal input of organelles, differential replication of organelles, or nucleo-organelle incompatibility.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-0662
    Keywords: J NO 2 ; NO2 photolysis ; atmospheric photochemistry ; J NO 2measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract An instrument, specifically designed for measurements from a balloon platform in the stratosphere, has been used to obtain ground-level values of the atmospheric photodissociation coefficient of nitrogen dioxide, J NO 2.A typical clear-sky value is 8.0×10-3 s-1 when the solar zenith angle is 40°. Measurements were made as a function of solar zenith angle and correlated with a calibrated Eppley UV radiometer. It is shown that J NO 2may be expressed as a simple function of the radiometer output so that estimates of J NO 2can be made using just an upward looking radiometer to an accuracy of about 20%. The measurements are also found to be in good agreement with calculations of J NO 2using a simplified isotropic multiple scattering computer routine.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-0662
    Keywords: J NO 2 ; NO2 photolysis ; atmospheric photochemistry ; J NO 2 measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The photodissociation coefficient of NO2, J NO 2, has been measured from a balloon platform in the stratosphere. Results from two balloon flights are reported. High Sun values of J NO 2 measured were 10.5±0.3 and 10.3±0.3×10-3 s-1 at 24 and 32 km respectively. The decrease in J NO 2 at sunset was monitored in both flights. The measurements are found to be in good agreement with calculations of J NO 2 using a simplified isotropic multiple scattering computer routine.
    Type of Medium: Electronic Resource
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