Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    Ferrochelatase activity inAzospirillum brasilense with reference to the influence of metal cations (1989)
    Springer
    BioMetals 2 (1989), S. 31-35 
    Details
    ISSN: 1572-8773
    Schlagwort(e): Heme synthesis ; Iron metabolism ; Membranes ; Cation inhibition ; Metalloporphyrin
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Summary Ferrochelatase in membrane preparations fromAzospirillum brasilense displayed an activity of 2.17 μmol protoheme formed · h−1 · mg protein−1 which is 10-fold greater than previous reports for other bacteria. This ferrochelatase showed an apparentK m of 20.9 μM for Fe2+, a pH optimum of 6.0–6.5, and stimulation by oleic or stearic acids. Co2+, Cu2+ and Zn2+ inhibited the incorporation of Fe2+ into protoporphyrin IX while Ni2 and Mg2+ had no effect on protoheme synthesis. Activity with Fe2+ and mesoporphyrin IX was less than with protoporphyrin IX but deuteroporphyrin IX produced the highest rate of protoheme synthesis. The membrane fraction containing ferrochelatase activity was found to insert Cu2+, Ni2+, Zn2+ and Co2+ enzymatically into protoporphyrin IX to produce metalloporphyrins. Cu2+ incorporation into protoporphyrin IX proceeded at a rate greater than with Fe2+ and theK m for Cu2+ was 21.9 μM.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01116198
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Problems in heathland and grassland dynamics (1981)
    Springer
    Plant ecology 46-47 (1981), S. 61-74 
    Details
    ISSN: 1573-5052
    Schlagwort(e): Allelopathy ; Competition ; Disease ; Dispersal ; Fire ; Grassland ; Grazing ; Heathland ; Soil ; Stability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A review of factors governing vegetation change in heathlands and grasslands is presented, with emphasis on soil factors. Climate, microclimate, fire, fauna, grazing by vertebrates, grazing by invertebrates, disease, dispersal, establishment, competition, allelopathy, stabilization, soil formation and podzolization are discussed with emphasis on inconsistencies and lacks in our present knowledge. Examples are mainly from NW European Calluna heath and related woodlands.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00118384
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Mid-infrared imaging of ultracompact H II regions (1994)
    Springer
    Experimental astronomy 3 (1994), S. 159-160 
    Details
    ISSN: 1572-9508
    Schlagwort(e): H II regions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We discuss preliminary results of an 11.7 μm imaging survey of ultracompact H II regions from the Wood and Churchwell radio survey. We find that that the morphologies of ionized gas and warm dust are often significantly different, indicating that an H II region classification scheme should be based on more than radio data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00430147
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...