Search for dissertations about: "amorphous cellulose"

Showing result 11 - 15 of 23 swedish dissertations containing the words amorphous cellulose.

  2. 11. On the chemical and processing stability of pharmaceutical solids : Solid form dependent water presenting capacity and process induced solid form transformation

    Author : Mina Heidarian Höckerfelt; Göran Alderborn; Stefan Ulvenlund; Uppsala universitet; []
    Keywords : ;

    Abstract : There is a need for improving our knowledge and understanding about formation mechanisms and nature of amorphous state in order to prevent the unintended presence of disorder in solid pharmaceutical products and reduce the related stability issues. The suggested theory that water binding capacity of amorphous cellulose affects the chemical stability of hydrolysis sensitive drugs in formulations with cellulose based excipients needs a clarification and water-cellulose interaction profiles need to be examined. READ MORE

  4. 12. Sucrose cleavage pathways in aspen wood

    Author : Umut Rende; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Cellulose is the main component of wood and one of the most important renewable raw materials. In several tree species including Populus species, carbon for cellulose biosynthesis is derived from the disaccharide sucrose. READ MORE

  5. 13. On the physico-chemical properties of softwood hemicellulose and compounds derived from it

    Author : Polina Naidjonoka; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Hemicellulose is the second largest polysaccharide group available in nature after cellulose. Hemicellulose is present in plant cell walls along with cellulose and lignin. It is an abundant and biodegradable material that could potentially replace fossil-based products. READ MORE

  6. 14. Ionic liquids in bio-refining : synthesis and applications

    Author : John Gräsvik; Jyri-Pekka Mikkola; Bertil Eliasson; Manu Lahtinen; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ionic liquid; Joniska vätskor;

    Abstract : Fossil fuel resources are not limitless so alternative renewable recourses are needed to fill the void that inevitably will be created once the supplies of this resource start do dwindle. Biomass has the potential to fill this void. READ MORE

  7. 15. Hierarchical cellulosic reinforcement for composites: enhanced resistance to moisture and compatibility with polymers

    Author : Abdelghani Hajlane; Mikael Skrifvars; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

    Abstract : Cellulosic fibres (flax, hemp, regenerated cellulose) possess decent mechanical properties and they are gaining interest as an alternative to synthetic reinforcement (e.g. glass fibres) in polymers to reduce the petroleum consumption and pollution. READ MORE