Moglichkeiten der nattürlichen und künstlichen Regeneration einer Waldbrandfläche in den Tiroler Kalkalpen

Ohne Zusammenfassung     

Farbtafel Atlas der Krankheiten und Sch?dlinge an landwirtschaftlichen Kulturpflanzen

Ohne Zusammenfassung     

Overlapping of dielectric relaxation spectra in oven-dry yellow birch at temperatures from 20 to 100°C

Summary The existence of three overlapping dielectric relaxation spectra from oven dry yellow birch was found over the frequency range from 20 Hz ... 2 GHz and at the temperature range from 20 ... 100°C. Origin of the spectra is largely attributed to hindered reorientation of various dipolar groups in the material. The spectra were resolved in terms of the super-position principle for dielectric loss and permittivity, and the distribution of relaxation times. The spectral resolution was checked by the Cole-Cole plot. The values for the activation energies indicate, as expected, that the dipolar groups are imbedded by hydrogen bonding in the solid structure. The crystalline portion of native cellulose in the wood estimated from the spectra agrees with such data from other sources.     

Zur Überwinterung vonOrchestes (Rhynchaenus) fagi L.

Ohne Zusammenfassung     

Weitere Versuche mit Zusätzen zu Rattenködern

Ohne Zusammenfassung