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  • SPACE RADIATION  (4)
  • Amino acids  (1)
  • Optics  (1)
  • Plant organs  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Changes during development in the free amino acid constituents of fababean (Vicia faba L.) plants (1983)
    Springer
    Plant and soil 75 (1983), S. 435-442 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Amino acids ; Asparagine ; Dopa ; Fababean ; Plant organs ; Vicia faba L.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Nodulated fababeans growing in unfertilized soil were sampled at intervals during development and the plants divided into their constituent organs before extraction and determination of the separate free amino acid contents. At each developmental stage asparagine and 3,4-dihydroxyphenylalanine (Dopa) were the most abundant free amino acids in all organs except the seeds. Of the second-order constituents, there were respectively, modest amounts of serine and glutamine in the leaves, tyrosine in the pods and alanine in the young seeds. During plant development there were marked differences in both the amount and composition of the free amino acid fraction in some organs. The concentration of asparagine increased sharply during pod-fill in both stems and pods and it is suggested that this is the form in which much N is moved into the seeds for protein synthesis. Young seeds contained much free asparagine, glutamine and alanine but with time the two latter constituents were replaced by arginine. There was a rapid accumulation of Dopa in the fruits and leaves during early pod-fill but the amount decreased as the plants aged and the Dopa content of the mature seeds were extremely low.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02369977
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 2
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    Limits on Gaussian fluctuations in the cosmic microwave background at 19.2 GHz (1991)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-24
    Beschreibung: The Northern Hemisphere data from the 19.2 GHz full sky survey are analyzed to place limits on the magnitude of Gaussian fluctuations in the cosmic microwave background implied by a variety of correlation functions. Included among the models tested are the monochromatic and Gaussian-shaped families, and those with power law spectra for n from -2 to 1. We place an upper bound on the quadrupole anisotropy of DeltaT/T less than 3.2 x 10 exp -5 rms, and an upper bound on scale-invariant (n = 1) fluctuations of a2 less than 4.5 x 10 exp -5 (95 percent confidence level). There is significant contamination of these data from Galactic emission, and improvement of our modeling of the Galaxy could yield a significant reduction of these upper bounds.
    Schlagwort(e): SPACE RADIATION
    Materialart: In: After the first three minutes; Proceedings of the 1st Astrophysics Workshop, Univ. of Maryland, College Park, Oct. 15-17, 1990 (A93-23605 07-90); p. 107-112.
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 3
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    A millimeter-wave anisotropy experiment (MAX) to search for anisotropy in the cosmic background radiation on medium angular scales (1991)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: We report preliminary results from two balloon flights of a millimeter-wave telescope designed to measure anisotropy in the cosmic microwave background (CMB) on angular scales from 0.3 to 3 degrees. The receiver used in the first flight, in November 1989, was a dichroic, He-3-cooled bolometric photometer with passbands centered at 3, 6, 9, and 12/cm. The second flight, in July 1990, employed improved bolometric detectors. The 3/cm band was removed in order to increase the efficiency of the remaining bands. Preliminary analysis of the data gives a factor of 3 improvement in sensitivity over the first flight in the 6/cm band. Future plans include a new receiver to provide an additional factor of 5 improvement in sensitivity and a new balloon-borne telescope which is optimized for low-background bolometric detectors at millimeter wavelengths.
    Schlagwort(e): SPACE RADIATION
    Materialart: In: After the first three minutes; Proceedings of the 1st Astrophysics Workshop, Univ. of Maryland, College Park, Oct. 15-17, 1990 (A93-23605 07-90); p. 123-128.
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 4
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    Unbekannt
    Removing Fringes from STIS Slitless Spectra and WFC3 CCD Images (2002)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: We have developed a model that allows us to defringe slitless 2-dimensional spectra taken with the Space Telescope Imaging Spectrograph (STIS). An IDL tool has been developed which allows the user to defringe any spectrum obtained with the G750L grating on STIS. This technique has been employed to model the fringing on Wide Field Camera 3 (WFC3) flight candidate CCDs.
    Schlagwort(e): Optics
    Materialart: Hubble Space Telescope Workshop; Oct 17, 2002 - Oct 18, 2002; Baltimore, MD; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unbekannt
    Limits of Gaussian fluctuations in the cosmic microwave background at 19.2 GHz (1992)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: The Northern Hemisphere data from the 19.2 GHz full sky survey are analyzed to place limits on the magnitude of Gaussian fluctuations in the cosmic microwave background implied by a variety of correlation functions. Included among the models tested are the monochromatic and Gaussian-shaped families, and those with power-law spectra for n values between -2 and 1. An upper bound is placed on the quadrupole anisotropy of Delta T/T less than 3.2 x 10 exp -5 rms, and an upper bound on scale-invariant (n = 1) fluctuations of a2 less than 4.5 x 10 exp -5 (95 percent confidence level). There is significant contamination of these data from Galactic emission, and improvement of the modeling of the Galaxy could yield a significant reduction of these upper bounds.
    Schlagwort(e): SPACE RADIATION
    Materialart: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 391; 2, Ju; L49-L52
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 6
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    A search for anisotrophy in the cosmic microwave background on intermediate angular scales (1992)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-27
    Beschreibung: The results of a search for anisotropy in the cosmic microwave background on angular scales near 1 deg are presented. Observations were simultaneously performed in bands centered at frequencies of 6, 9, and 12 per cm with a multifrequency bolometric receiver mounted on a balloon-borne telescope. The statistical sensitivity of the data is the highest reported to date at this angular scale, which is of critical importance for understanding the formation of structure in the universe. Signals in excess of random were observed in the data. The experiment, data analysis, and interpretation are described.
    Schlagwort(e): SPACE RADIATION
    Materialart: Astrophysical Journal, Part 1 (ISSN 0004-637X); 395; 2 Au
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
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