Sökning: "freeze-drying"
Visar resultat 16 - 20 av 57 avhandlingar innehållade ordet freeze-drying.
16. Bio-inspired cellulose nanocomposites and foams based on starch matrix
Sammanfattning : In 2007 the production of expanded polystyrene (EPS) in the world was over 4 million tonnes and is expected to grow at 6 percent per year. With the increased concern about environmental protection, alternative biodegradable materials from renewable resources are of interest. LÄS MER
17. Nanofiber networks, aerogels and biocomposites based on nanofibrillated cellulose from wood
Sammanfattning : Nanofibrillated cellulose (NFC) from wood is an interesting material constituent of high strength and high aspect ratio, which easily forms networks through interfibril secondary bonding including hydrogen bonds. This has been exploited in preparation of new materials, which extend the range of properties for existing cellulosic materials. LÄS MER
18. Synthesis of Yb:Y2O3 nanoparticles and fabrication of transparent polycrystalline yttria ceramics
Sammanfattning : More efficient laser materials are needed for space applications in order to save weight and make cost-savings. The fabrication of polycrystalline ceramic materials is a solution to obtain new compositions with better efficiency. LÄS MER
19. Characterization of respiratory physiology in Lactococcus lactis for high-yield production of high-performance starter cultures
Sammanfattning : Fermented food products are consumed world-wide, every day, and the demand is growing as intake increases. Lactococcus lactis is a lactic acid bacterium commonly used as a starter culture to produce fermented dairy products. LÄS MER
20. Synthesis of ytterbium-doped yttrium oxide nanoparticles and transparent ceramics
Sammanfattning : In this thesis, the author reports on a ceramic process leading to transparent ytterbium doped yttrium oxide ceramics. The full production route was investigated, namely: powder preparation, compaction and sintering. First, yttria nano-powder was fabricated from a precursor with transient morphology, i.e. LÄS MER