Sökning: "enzymatic hydrolysis"

Visar resultat 26 - 30 av 130 avhandlingar innehållade orden enzymatic hydrolysis.

1. 26. Fermentation and Cultivation Technology for Improved Ethanol Production from Lignocellulose

   Författare :Andreas Rudolf; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemiteknik och kemisk teknologi; Chemical technology and engineering; Fermentation; Lignocellulose; Hydrolysis; Bioethanol;

   Sammanfattning : The work presented in this thesis has been aiming at improving ethanol production from lignocellulose. Ethanol from renewable resources is receiving renewed attention due to apprehensions of global warming and dwindling oil reserves. Lignocellulose constitutes a potential raw material source for large scale ethanol production. LÄS MER

3. 27. Determination of Fat-Soluble Vitamins in Foods Based on Supercritical Fluid Extraction

   Författare :Charlotta Turner; Kemiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supercritical fluid extraction; Solvent collection; Solid phase trapping; SFE; Selectivity; Retinol; Milk powder; Lipase; Food; Enzymatic hydrolysis; Alcoholysis; Candida antarctica; Tocopherol; Vitamins; Analytical chemistry; Analytisk kemi;

   Sammanfattning : Sample clean-up methodologies based on supercritical fluid extraction (SFE) have been developed for determination of fat-soluble vitamins in foods. This thesis focuses on method development, stressing important issues concerning sample pre-treatment, extraction conditions and collection parameters. LÄS MER

4. 28. Implications of feedstock diversity on forest-based ethanol production

   Författare :Balazs Franko; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ethanol; Lignocellulose; Softwood; Spruce; Bark; Forest residues; Steam pretreatment; Enzymatic hydrolysis;

   Sammanfattning : The utilization of lignocellulosic biomass to produce biofuels, such as bioethanol, has the potential to provide a sustainable alternative to fossil fuels, and thus mitigate greenhouse gas emissions from the transportation sector.Forest biomass is expected to be a significant source of such biomass, as it can serve as an abundant and sustainable feedstock for bioethanol production. LÄS MER

5. 29. Lignocellulosic Ethanol Production Based on Steam Pretreatment and SSF: Process Development through Experiments and Simulations

   Författare :Per Sassner; Avdelningen för kemiteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process simulation; Energy efficiency; SSF; Enzymatic hydrolysis; Lignocellulose; Steam pretreatment; Ethanol production; Process economics; Flow-sheeting;

   Sammanfattning : Lignocellulosic materials, such as wood, waste products from the forestry industry, agricultural residues and herbaceous crops, serve as an abundant and comparatively cheap feedstock with the potential to be used for large-scale ethanol production. However, the complex structure of lignocellulosic materials, the presence of various hexose and pentose sugars in hemicellulose, and the presence of various compounds that inhibit the fermenting organism constitute physical barriers that add to the production cost and make full-scale introduction economically more risky. LÄS MER

7. 30. On the two forms of amylose-lipid complexes

   Författare :Fredrik Tufvesson; Livsmedelsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bread; enzymatic hydrolysis; resistant starch; digestibility; fatty acid; monoglyceride; polar lipid; differential scanning calorimetry; annealing; amylose-lipid complex; crystallization; Food and drink technology; Livsmedelsteknik; Biotechnology; Bioteknik;

   Sammanfattning : This thesis is about the formation of amylose-lipid complexes, and their properties. Two forms of superstructures can be identified. Complex form I has more randomly distributed helices, while the structure of form II is crystalline and therefore exhibits the typical V-pattern in X-ray diffraction analyses. LÄS MER