Search for dissertations about: "polyethylene-glycol"

Showing result 6 - 10 of 78 swedish dissertations containing the word polyethylene-glycol.

2. 6. Tailoring Cellulose Nanofibrils for Advanced Materials

   Author : Núria Butchosa Robles; Qi Zhou; Kristiina Oksman; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose nanofibrils; bacterial cellulose; surface modification; carboxymethyl cellulose; polyethylene glycol; chitin nanocrystals; bactericidal activity; nanofibrils orientation; water redispersability; mechanical properties; dye removal; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Abstract : Cellulose nanofibrils (CNFs) are nanoscale fibers of high aspect ratio that can be isolated from a wide variety of cellulosic sources, including wood and bacterial cellulose. With high strength despite of their low density, CNFs are a promising renewable building block for the preparation of nanostructured materials and composites. READ MORE

4. 7. Symmetry in Asymmetric Catalysis and Hydrogen Bond-Based Self-Assembly : Synthesis and Investigations

   Author : Yutang Li; Centrum för analys och syntes; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; bissalen; asymmetric ring opening; pseudo-Cs; hydrogen bonding; self-assembly; C3 symmety; trilactam; scXRD; solubility; epoxidation; rearrangement; Baeyer-Villiger reaction; transition state; DFT calculation; cyclodextrin; polyethylene glycol; amphiphilicity;

   Abstract : The thesis elaborates on four different projects focusing on synthesizing symmetry-related molecules and investigating their performance as catalysts for asymmetric catalysis or as monomers for hydrogen bond-based self-assembly.Chapter 2 describes a new method to desymmetrize a meso-ligand. READ MORE

5. 8. Hydrophobically Modified Polymers. Rheology and Molecular Associations

   Author : Leif Karlson; Fysikalisk kemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; polymer self diffusion; Physical chemistry; Fysikalisk kemi; rheology; hydrophobically modified polyethylene glycol; hydrophobically modified ethyl hydroxyethyl cellulose; cyclodextrin; hydrophobically modified polymer; associative thickener;

   Abstract : Structure- property relationships and thickening mechanism in aqueous solution of two hydrophobically modified polymers (HM-P) with different architecture have been investigated. The two polymers, hydrophobically modified ethyl hydroxyethyl cellulose (HM-EHEC) and hydrophobically modified polyethylene glycol (HM-PEG), are commonly used as associative thickeners in the paint industry. READ MORE

6. 9. Surfactants based on natural products - enzymatic synthesis and functional characterization

   Author : Fredrik Viklund; KTH; []
   Keywords : Enzymatic synthesis; Surfactants; Antioxidants; Ascorbyl oleate; Polyethylene glycol PEG esters; Hemolysis; Transepithelial electrical resistance; Ionic liquids; Candida antarctica lipase B;

   Abstract : Surfactants are molecules that contain a water-soluble and afat-soluble part. They have important functions in productssuch as detergents, cosmetics, pharmaceuticals and foods aswell as in many industrial processes. Surfactants are used onvery large scale, which makes it important to decrease theirimpact on the environment. READ MORE

7. 10. Biomarkers for colon cancer : applications in human and rat studies

   Author : Pernilla C. Karlsson; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Colon cancer biomarkers; faecal water; polyethylene glycol; synbiotics; COX-2 inhibitors;

   Abstract : Colon cancer is one of the major causes of cancer in industrialized countries, and it is caused by a combination of hereditary, environmental and dietary factors and lack of physical activity. Of these factors, diet is one of the most important. READ MORE