Sökning: "yellowing"
Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet yellowing.
1. Light-Induced Yellowing of High-Yield Pulps. The Effect of Acetylation
Sammanfattning : This thesis is a contribution to the understanding of the mechanism of photoyellowing of high-yield pulps. It also gives some general information about the reactivity of different functional groups in lignin towards acetic anhydride. LÄS MER
2. 13C-Enriched Dehydrogenation Polymers Used for Studying Light-Induced Yellowing of Lignocellulosic Materials
Sammanfattning : This study deals with the use of selectively 13C-enriched dehydrogenation polymers (DHPs) as models of lignin in lignocellulosic materials for elucidating the reaction pathways involved in light-induced yellowing. Methods for the synthesis of coniferin, a precursor to lignin and DHP, selectively 13C-enriched in the aromatic ring (positions 1, 3, 4, and 5) have been developed. LÄS MER
3. Light-induced yellowing studied with ¹³C-enriched CW-DHP and solid state ¹³C NMR spectroscopy
Sammanfattning : .... LÄS MER
4. on the thermal yellowing of TCF- bleached birch kraft pulp
Sammanfattning : .... LÄS MER
5. Coconut lethal yellowing phytoplasma disease in Mozambique : diversity, host range, and the impact of farming practices on disease incidence
Sammanfattning : The coconut palm (Cocos nucifera) is a major cash crop that is widely grown in coastal tropical regions of the world, including Mozambique. Outbreaks of coconut lethal yellowing disease (CLYD) are threatening the industry and the livelihood of a large part of the Mozambican population. LÄS MER