منابع مشابه
Wavelength Dependence of Dark Adaptation in Phycomyces Phototropism PAUL GALLAND
The wavelength dependence of phototropic dark adaptation in Phycomyces was studied between 347 and 545 nm. Dark adaptation kinetics were measured for wavelengths of 383, 409, 477, and 507 nm in the intensity range from 6.2 x 10-2 to 2 x 10-7 W. tri2. At these wavelengths, dark adaptation follows a biexponential decay as found previously with broadband blue light (Russo, V. E. A., and P. Galland...
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Bay environments differ in productivity and species composition from open waters. Transects of surface sediments in Lake Washington (Seattle) reveal significant morphological gradients in the small pelagic cladoceran Bosmina longirostris. In all bays examined, these bosminids range from shorter featured clones nearshore to longer featured clones offshore. However, because bays constitute such a...
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The use of pollen records to document vegetation responses to climatic change in mountains relies on the ability of pollen assemblages to differentiate among elevationally stratified vegetation zones. Comparisons among modern pollen assemblages within mountainous areas provide a basis for assessing this potential. We examined relationships between pollen assemblages, forest vegetation and clima...
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A recent workshop sponsored by the National Science Foundation, the Government Information Technology Services Board, and the National Institutes of Health investigated the use of information technology within the federal government. A final report on the findings of that workshop was issued in June. This column reflects a summary of those findings; the full report can be found at www.isi.edu/ ...
متن کاملHowe Correspondence and Springer Correspondence
Consider real reductive group G, as defined in [Wal88]. Let Π be an irreducible admissible representation of G with the distribution character ΘΠ, [Har51]. Denote by uΠ the lowest term in the asymptotic expansion of ΘΠ, [BV80]. This is a finite linear combination of Fourier transforms of nilpotent coadjoint orbits, uΠ = ∑ O cOμ̂O. As shown by Rossmann, [Ros95], the closure of the union of the ni...
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ژورنال
عنوان ژورنال: The Annals of Iowa
سال: 1899
ISSN: 0003-4827,2473-9006
DOI: 10.17077/0003-4827.2380