Library

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • 2000-2004
  • 1990-1994
  • 1975-1979  (2)
  • 1975  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 35 (1975), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In a solution culture experiment with 4-week-old barley plants (variety Villa) the influence of NaCl salinization and of KCl additions on the uptake and turnover of labelled N (15NH415NO3) was studied. Labelled N was applied for 24 h at the end of the growth period.Salinization impaired growth and uptake of labelled N. The incorporation of labelled N into the protein fraction, however, was improved by NaCl salinization. Additions of KCl to the nutrient solution diminished the negative effect of NaCl salinization on growth. At both NaCl salinization levels (60 and 120 mM) K additions favoured the uptake of labelled N and particularly its incorporation into the protein fraction.It is suggested that the negative influence of the NaCl stress is not primarily due to an impaired protein synthesis, but is possibly caused by a deterimental effect of Na on other metabolic processes.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 276 (1975), S. 111-116 
    ISSN: 1618-2650
    Keywords: Analyse von Ferrolegierungen ; Röntgenfluorescenz und Emissionsspektrometrie ; Probenvorbereitung durch Umschmelzen und Feinstmahlung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine Vielzahl von Ferrolegierungen lassen sich für die Emissions- bzw. Röntgenfluorescenzspektrometrie durch Umschmelzen nach dem Schleuderverfahren vorbereiten. In den Fällen, in denen eine zu große Viscosität der Schmelzen, Reaktionen mit dem Tiegelmaterial oder der Einfluß des Sauerstoffs die Probenherstellung durch Umschmelzen unmöglich macht, kann die Vorbereitung durch Naßmahlung erfolgen. Hierbei werden beispielsweise 60 g einer Ferrolegierung mit 60 ml Isopropanol in einer Scheibenschwingmühle 5 min gemahlen. Das durch diese Feinstmahlung erhaltene Gut wird anschließend in bekannter Weise zu einem Preß-ling verarbeitet. Darüber hinaus können durch Naßmahlung auch oxidische Stoffe aufbereitet werden. Die Einführung des Naßmahlverfahrens stellt damit eine sinnvolle Ergänzung der übrigen Vorbereitungs-techniken wie Umschmelz- und Aufschlußverfahren dar.
    Notes: Abstract For the sample preparation of many ferroalloys in connection with their analysis by optical emission or X-ray spectrometry the recasting process has been approved. In those cases in which due to high viscosity of the melt, reactions with the refractory material of the crucible or the influence of oxygen the recasting technique is not applicable, the samples can be prepared by “wet grinding”. The following example shows the typical conditions: 60 g of a ferroalloy and 60 ml isopropanol are grinded for 5 min in a disk swing mill. The final step of preparation is done by pressing of the material received. Furthermore, oxide materials may be prepared by wet grinding. The described wet grinding process completes the other wellknown preparation techniques like remelting and chemical decomposition.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...