Sökning: "hardwood"

Visar resultat 11 - 15 av 82 avhandlingar innehållade ordet hardwood.

1. 11. Birch Stem and Wood Traits in Genetic and Silviculture Trials in Southern Sweden

   Författare :Grace Jones; Stergios Adamopoulos; Mateusz Liziniewicz; Mikael Andersson; Sheikh Ali Ahmed; Erkki Verkasalo; Linnéuniversitetet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; acoustic velocity; Betula spp.; dynamic MOE; genetic parameters; grain angle; hardwood; Itrax densitometry; mixed forests; non-destructive testing; stem form; akustisk velocitet; Betula spp.; blandskog; densitometri; genetiska parametrar; icke destruktiva metoder; Itrax; lövträ; skogsodling; stamkvalitet; vedsegenskaper; Forestry and Wood Technology; Skog och träteknik;

   Sammanfattning : Swedish tree species of birch (silver: Betula pendula and downy: B. pubescens) are often neglected during forest management activities, resulting in low value logs. This thesis investigated birch stem characteristics and wood properties important for solid wood products, in genetics and management trials in southern Sweden. LÄS MER

3. 12. Kraft pulping of birch: Insights into delignification and xylan removal

   Författare :Carolina Marion de Godoy; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mass transport; xylan; kraft pulping; delignification; black liquor; hardwood;

   Sammanfattning : Kraft pulping is a well-established process in the production of many wood-based materials, holding a strategic position in the transition towards a bioeconomy. Nevertheless, further process development is needed to increase its resource-efficiency, assimilate new feedstocks and meet new specifications. LÄS MER

4. 13. Lignin-Based Thermosets with Tunable Mechanical and Morphological Properties : A Study of Structure-Property Relationships

   Författare :Iuliana Ribca; Mats Johansson; Martin Lawoko; Stephan V. Roth; Mika Sipponen; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Softwood; hardwood; technical lignin; solvent fractionation; allylation; thiol-ene thermosets; thioether linkage; wide-angle X-ray scattering; π-π stacking interactions; Barrträ; lövträ; tekniskt lignin; lösningsmedelsfraktionering; allylering; tiol-en-härdplaster; tioeterbindning; vidvinkelröntgenspridning; π-π staplingsinteraktioner; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Nowadays, there is an urgent need to decrease our dependence on fossilresources and shift towards the use of renewable resources for advancingsustainable development. Utilizing renewable and bio-based raw materials,such as lignocellulosic biomass, for designing new materials is a promisingapproach to promote this objective. LÄS MER

5. 14. Characterization of chemical pulp fiber surfaces with an emphasis on the hemicelluloses

   Författare :John Sjöberg; KTH; []
   Nyckelord :adsorption; analytical pyrolysis; capillary electrophoresis; carbohydrate; chemical pulp; ECF pulp; enzymatic hydrolysis; fibre surface; hardwood; hemicellulose; hexenuronic acid; kraft pulp; molecular weight distribution; peeling; residual lignin; s;

   Sammanfattning : .... LÄS MER

7. 15. Characterization of acetylated hemicelluloses from hardwood

   Författare :Maria Nordström; KTH; []
   Nyckelord :acetyl; aspen; birch; chlorite delignification; degree of acetylation;

   Sammanfattning : .... LÄS MER