Sökning: "Cyclodextrin"

Visar resultat 1 - 5 av 45 avhandlingar innehållade ordet Cyclodextrin.

1. 1. Fullerene γ-Cyclodextrin Complexes

   Författare :Thomas Andersson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; C60; a-cyclodextrin; aggregates; FAB LSIMS; Buckminsterfullerene; g-cyclodextrin; b-cyclodextrin; ring-currents; fullerene; host-guest; C70;

   Sammanfattning : The fullerenes, C60 and C70, can form inclusion complexes with .gamma.-cyclodextrin as the host. The complexes are formed by refluxing a water solution of . LÄS MER

3. 2. A Microcalorimetric Study of Macrocyclic Complexes in Aqueous Solution

   Författare :Magnus Stödeman; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Aqueous Solution; Calixarene; Cyclodextrin; Vaporization; Macrocyclic compounds; Microcalorimetry; Kemi;

   Sammanfattning : The present work involves a microcalorimetric characterization of the interactions among macrocyclic compounds and aliphatic molecules in aqueous solution. The macrocyclic compounds used in the study are a-,b- and g-cyclodextrin and 25,26,27,28-tetrahydroxycalix[4]arene-5,11,17,23- tetrasulphonate. LÄS MER

4. 3. Novel Gemini Surfactants Based on Natural Products Aggregation Behaviour in Aqueous Solutions

   Författare :El-Ouafi Alami; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cyclodextrin; micelles; NMR self-diffusion; heterogemini surfactant; adsorption; micellar model; small-angle neutron-scattering; surface tension;

   Sammanfattning : There is currently much interest in using natural products to obtain novel types of surfactants. One of the reasons for increasing the proportion of surfactants based on natural products and replacing products based on petroleum raw materials is the growing concern about the environment. LÄS MER

5. 4. Synergistic interactions involving amphiphilic polymers in solution

   Författare :Maria Karlberg; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hydrophobic modification; cyclodextrin; rheology; emulsion stability; Fysikalisk kemi; Physical chemistry; cellulose derivative; degradable surfactants; amylose;

   Sammanfattning : The properties of hydrophobically modified cellulose derivatives in aqueous mixtures with various other molecules have been investigated. Mixtures of a hydrophobically modified polymer and alkali-sensitive, degradable surfactants gave rise to time-dependent viscosities. LÄS MER

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

   Författare :Leif Karlson; Fysikalisk kemi; []
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER