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  • Chemistry  (5)
  • Organic Chemistry  (3)
  • nitrate reductase  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Regulation of sulfate assimilation by amino acids in Lemna minor L.
    Amsterdam : Elsevier
    Plant Science 44 (1986), S. 125-132 
    Details
    ISSN: 0168-9452
    Keywords: ATP sulfurylase ; adenosine 5'-phosphosulfate sulfotransferase ; amino acids ; nitrate reductase ; sulfate assimilation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-9452(86)90081-6
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Uptake and assimilation of atmospheric NO2 — N by spruce needles (Picea abies): A field study (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 1497-1502 
    Details
    ISSN: 1573-2932
    Keywords: NO2 ; dry deposition ; gas exchange ; picea abies ; spruce forests ; nitrate reductase ; nitrogen assimilation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract NO2 enters spruce needles by gas exchange through the slomata. Nitrate formed from NO2 is reduced in the cytosol by nitrate reductase (NR), the rate limiting enzyme of the nitrogen assimilatory pathway. A linear relationship was found between the nitrate reductase activity (NRA), NO2 concentration and the amount of N incorporated into amino acids and proteins, so that NRA was suggested as an estimate of NO2-uptake. In the present field study, 50 spruce trees (Picea abies) have been selected, which grow in a natural habitat in a NO2 concentration gradient in a forest crossed by a highway which is a major NO source. At part of the sites, the microclimatic conditions have been recorded, so that common models of local gas exchange of the needles could be used to estimate stomatal uptake of NO2. NRA was investigated as a function of radiation and stomatal uptake on the day before needle sampling. Close to the highway NRA was permanently elevated with a maximum in summer. As with the laboratory results, a linear relationship between stomatal uptake and NRA was found. Total N — content of current year shoots was not affected by the additional N-source provided by airborne NO2. The present study shows that the gas exchange models are consistent with the physiological reactions of spruce needles on a local level and therefore contribute to the validation of calculations of NO2 dry deposition to spruce forests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00477193
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A deceleration lens system for hybrid mass spectrometers (1989)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 3 (1989), S. 417-419 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A simple and efficient deceleration system for the coupling of magnetic and electric sector instruments to quadrupole analyzers is described. The trasnsmission efficiency of the system appears to be at least 80% or better as the ions are decelerated from 3 ke V to 30 eV (a deceleration factor of 1:100). No mass discrimination was observed in the range up to mass 1000.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290031203
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A novel hybrid mass spectrometer (1989)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 3 (1989), S. 62-66 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A new hybrid mass spectrometer of BEQiQu geometry (B, magnetic sector; E, Electric sector; Qi, quistor; Qu, quadrupole mass filter) is described. The high resolution stage (BE) is coupled to a quistor via a series of deceleration lenses, and this is followed by a mass-analysing quadrupole. This configuration enables the storing of ions, investigation of their gas-phase chemistry and the subsequent identification of the resulting fragment or product ions.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290030303
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    L-Histidinol (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1936-1938 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Reduktion von Dibenzoyl-L-histidinmethylester mit LiAlH4 wurden Monobenzoyl-L-histidinol und aus letzterem durch Verseifung L-Histidinol hergestellt. Letztere Verbindung zeigt ähnliche pharmakologische Wirkung wie Histamin, aber erst in 1000-3000 mal höherer Dosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320619
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  • 6
    Electronic Resource
    Electronic Resource
    Die Reduktion von α-Aminocarbonsäureestern zu Aminoalkoholen mittels Lithiumaluminiumhydrid (1948)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 31 (1948), S. 1617-1623 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Reduktion mit Lithiumaluminiumhydrid wurde aus den entsprechenden Estern von α-Aminocarbonsäuren die folgenden Aminoalkohole dargestellt: D, L-Phenylalaninol, L(-)-Phenylalaninol, L(-)-Tyrosinol, L(+)-Alaninol, L(+)-Leucinol, L,(+)-2-Oxymethylpyrrolidin (L(+)-Prolinol), L(+)-2-Aminobutandiol-(1,4) (L(+)-Asparaginol), D, L-2-Aminobutandiol-(1,4) (D, L-Asparaginol) und 2-Amino-propandiol-( 1,3).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19480310624
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  • 7
    Electronic Resource
    Electronic Resource
    L-Valinol und L-Tyrosinol (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1156-1157 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Reduktion mit Lithiumaluminiumhydrid wurden aus L-Valin-methylester L-Valinol und aus L-Tyrosin-methylester L-Tyrosinol in guten Ausbeuten hergestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320374
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    Paper (German National Licenses)
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