Sökning: "Astrid Borg"

Hittade 2 avhandlingar innehållade orden Astrid Borg.

1. 1. Spectroscopical and electron diffraction studies of some unsaturated chlorohydrocarbons

   Författare :Astrid Borg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis deals with structural properties of unsaturated chlorhydrocarbons of general formulas C^H^Cl, C^H^Cl and as studied by microwave spectroscopy, electron diffraction and vibrational spectroscopic methods. The two former methods both give values of molecular structure parameters in gas phase, but due to different averages of the thermal motion the structures arrived at are not comparable. LÄS MER

3. 2. Volatiles of Conifer Seedlings : Compositions and Resistance Markers

   Författare :Astrid Kännaste; Anna-Karin Borg-Karlson; Anders Backlund; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Conifers; Norway spruce; Scots pine; Nalepella; Oligonychus ununguis; green leaf volatiles; terpenes; aromatics; benzenoids; SPME; induced defense reaction; Organic chemistry; Organisk kemi;

   Sammanfattning : Pine weevils cause major damage to newly planted conifer seedlings in reforestation areas. However, recent findings indicate that small (“mini”) seedlings, planted at the age of 7-10 weeks, are gnawed less by pine weevils than the larger, conventionally planted seedlings. LÄS MER