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
  • 1
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Es wird eine spektrometrische Technik für die Identifikation von bestrahltem Geflügelfleisch(gallus domesticus) und Strahlendosen zwischen 0,1 und 2,5 Mrad beschrieben. Die spektrophotometrische Bestimmung des Sulfhydrylgehaltes in dem tierischen Gewebe vor (Kontrolle) und nach der Bestrahlung wird mit Hilfe von 6,6′-Dithiodinikotinsäure durchgeführt. Ionisierende Strahlung verursacht einen bleibenden Verlust von Sulfhydrylgruppen in tierischen Geweben wie Geflügelfleisch. Die Bestrahlung bei Zimmertemperatur und Lagerung bei −18 °C über einen Zeitraum von ungefähr einen Monat läßt keine Wiederherstellung bzw. Reparatur des Sulfhydrylgruppenverlustes erkennen. Die Dosis-Effekt-Beziehung für diesen strahleninduzierten Abbau des Sulfhydrylgehaltes kann am besten durch eine doppelte Exponentialfunktion beschrieben werden. Über die Bestrahlungsbedingungen, die Herstellung von Proteinsuspensionen aus Geflügelfleisch, die spektrophotometrischen Bestimmungen und andere experimentelle Details wird berichtet. Die Ergebnisse werden im Detail diskutiert.
    Notes: Summary A spectrophotometric technique for the identification of irradiated chicken (gallus domesticus) and doses ranging between 0.1 and 2.5 Mrad is described. Spectrophotometric determination of the sulfhydryl content in the animal tissue before (control) and after using 6,6′-Dithiodinicotinic acid is applied. Ionizing radiation causes a permant loss of sulfhydryl groups in the animal tissus such as chicken. Irradiation at room temperature and storing at −18 °C over a period of approximately one month does not show restitution or repair of the sulfhydryl loss. The dose-effect relation for this radiation-induced decrease of the sulfhydryl content can be described best by a double exponential function. Irradiation conditions, preparation of protein suspension from chicken, spectrometric investigations and other experimental details are reported. The results of all will be discussed in detail.
    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
    Microchimica acta 133 (2000), S. 313-317 
    ISSN: 1436-5073
    Keywords: Key words: PIXE; heavy ion X-ray production cross sections; trace analysis ; PACS: 32.80Hd.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract.  Various K-, L- and M-shell X-ray production cross sections are measured for heavy ion impact on elements in the range Z 2 = 13 to 83. The ion species range from Z 1 = 10 to 36, and ion energies from 1 to 16 MeV are used. Enhanced cross sections are observed when the projectile K- or L- binding energy is similar to the energy of the target K-, L- or M-shell. This effect is used to improve the analysis sensitivity for selected elements. As an example trace analysis of Fe in glass with V, Mn, Co and Ni ions is investigated. Results are compared with proton induced X-ray emission analysis on the same samples. In these samples Fe-Kα X-ray production is similar for irradiation with 3 MeV protons and 14 MeV Ni ions. However the signal to background ratio is four times higher for the irradiation with Ni ions as compared to irradiation with protons. Advantages and drawbacks of heavy ion induced X-ray emission for quantitative analysis compared to proton induced X-ray emission analysis are discussed.
    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...