Sökning: "chitin"

Visar resultat 21 - 25 av 42 avhandlingar innehållade ordet chitin.

  1. 21. Rhizoctonia solani and sugar beet responses : genomic and molecular analysis

    Författare :Louise Andersson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The soil-borne basidiomycete Rhizoctonia solani (strain AG2-2) incite root rot disease in sugar beet (Beta vulgaris). The overall objective of this thesis work was to enhance the genomic knowledge on this pathogen and induced responses in the host to promote breeding of better performing cultivars. The AG2-2IIIB R. LÄS MER

  3. 22. Processing and Properties of Nanostructured Biocomposites

    Författare :Natalia Herrera Vargas; Maria Soledad Peresin; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Trä och bionanokompositer; Wood and Bionanocomposites;

    Sammanfattning : In this work, nanostructured biocomposite fibers and films with cellulose nanofibers (CNF), cellulose nanocrystals (CNC) and chitin nanocrystals (ChNC) were prepared using solutions mixing followed by electrospinning and melt compounding. The main processing challenges for these materials were to find parameters for: 1) fiber alignment in electrospinning, 2) feeding the nanomaterials into the extruder and 3) dispersion and distribution of the nanomaterials in the polymeric matrix. LÄS MER

  4. 23. Porous materials based on nanopolysaccharides for medical applications: Effect of crosslinking on pore structure and mechanical performance

    Författare :Narges Naseri; Orlando Rojas; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Trä och bionanokompositer; Wood and Bionanocomposites;

    Sammanfattning : The objective of this work was to develop nanochitin- and nanocellulose-based crosslinked porous nanostructured materials for wound dressing and cartilage repair with suitable porosity and mechanical properties to facilitate cell growth. In the first part of the work (papers I-III), chitosan-based nanocomposites loaded with a high concentration (50 wt%) of chitin nanocrystals (ChNC) and cellulose nanocrystals (CNC) were prepared via electrospinning for use as wound dressing materials. LÄS MER

  5. 24. New roles for apical secretion and extracellular matrix assembly in Drosophila epithelial morphogenesis

    Författare :Satish Arcot Jayaram; Christos Samakovlis; Catherine Rabouille; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; utvecklingsbiologi; Developmental Biology;

    Sammanfattning : Branched tubular organs, such as the lung and vascular system fulfill the respiratory needs of most animals. Optimal tissue function relies on the uniform sizes and shapes of the constituting branches in each organ. LÄS MER

  7. 25. Adhesion and Nanotribology of Biofibres

    Författare :Hiroyasu Mizuno; Mark Rutland; Nicholas Spencer; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The fibre probe atomic force microscope is developed, which allows direct measurement of force and friction between single fibres at the nanoscale under various conditions. In this work, polyester and human hair fibres were used as being representative of synthetic and animal fibre. LÄS MER