Sökning: "B-O-4"

Hittade 2 avhandlingar innehållade ordet B-O-4.

1. 1. On the bleachability of alkaline pulps. The influence of residual lignin structure

   Författare :Waleed Wafa Al-Dajani; KTH; []
   Nyckelord :B-O-4; bleachability; hexenuronic acid; hydrogen peroxide; hydrosulfide ion; hydroxyl ion; ionic strength; residual lignin.;

   Sammanfattning : .... LÄS MER

3. 2. Lignin Model Compounds: Synthesis, Stereochemistry and Acidolysis

   Författare :Shiming Li; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; boric acid complexes; Arylglycerol b-aryl ethers; stereochemistry; 3-Diaryl-2-propen-1-ols; 1; Phenylcoumarans; lignin model compounds; acidolysis; ion-exchange chromatography; 3-propanediols; 2-Diaryl-1; 2; X-ray crystallography;

   Sammanfattning : Lignin model compounds representative of structural elements in lignin of the b-1, b-5, b-O-4, cinnamaldehyde and cinnamyl alcohol types were synthesized. erythro-Forms of b-1 models of the 1,2-diaryl-1,3-propanediol type were prepared by BF3-catalyzed rearrangement of chalcone epoxides and subsequent reduction of the rearrangement products with NaBH4. LÄS MER