ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1572-9788
    Keywords: 1-acyl-sn-glycerol-3-phosphate acyltransferase ; Brassica napus ; Limnanthes douglasii ; trierucin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A cDNA encoding a 1-acyl-sn-glycerol-3-phosphate acyltransferase from Limnanthes douglasii was introduced into oil seed rape (Brassica napus) under the control of a napin promoter. Seed triacylglycerols from transgenic plants were analysed by reversed-phase HPLC and trierucin was detected at a level of 0.4% and 2.8% in two transgenic plants but was not found in untransformed rape seed. Total fatty acid composition analysis of seeds from these selected plants revealed that the erucic acid content was no higher than the maximum found in the starting population. Analysis of fatty acids at the sn-2 position showed no erucic acid in untransformed rape but in the selected transgenic plants 9% (mol/mol) and 28.3% (mol/mol) erucic acid was present. These results conclusively demonstrate that the gene from L. douglasii encodes a 1-acyl-sn-glycerol-3-phosphate acyltransferase which can function in rape and incorporate erucic acid at the sn-2 position of triacylglycerols in seed. Additional modifications may further increase levels of trierucin.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 272 (1974), S. 182-186 
    ISSN: 1618-2650
    Keywords: Best. von Quecksilber in Wasser ; Spektralphotometrie, Atomabsorption ; echte Integration ; Best. von Kupfer in Urin ; Spektralphotometrie, Atomabsorption ; echte Integration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine Verbesserung des Signal-Rausch-Verhältnisses in der Atom-Absorptions-Spektroskopie kann mit Hilfe der drei folgenden Methoden erreicht werden: Erhöhung der Zeitkonstanten, digitale Meßwertmittlung, echte Integration. Die Meßwertmittlung über echte Integration hat gegenüber den beiden anderen Methoden entscheidende Vorteile. Zwei Beispiele sollen zeigen, wie auf diesem Wege das Signal-Rausch-Verhältnis verbessert wird: Spurenanalyse von Quecksilber in Wasser mit Hilfe der flammenlosen AAS. Die Nachweisgrenze liegt bei 2 · 10−13 g/ml. Spurenanalyse von Kupfer in Urin mit Hilfe der Flammen-AAS. 1,3 · 10−8 g/ml Kupfer können ohne vorgeschaltete Extraktion bestimmt werden.
    Notes: Abstract An improvement of the signal-to-noise ratio in atomic absorption spectroscopy may be obtained by each of the following three methods of signal averaging: increase of the time constant digital signal averaging true integration of the signal The most adequate of these methods appears to be true integration. Two examples are presented to demonstrate the improved signal-to-noise ratio due to the application of this method: trace analysis of mercury in water by means of flameless AAS. The detection limit appears to be 0.2 ng which corresponds to a concentration of 2 · 10−13 g/ml. trace analysis of copper in human urine by means of flame AAS: 1,3 · 10−8 g/ml copper could be detected without any solvent extraction process.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...