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This thesis consists of experimental studies of transport properties in high mobility two dimensional electron gases (2DEGs). Two material systems are used, an AlGaAs/GaAs heterojunction and a GaInAs/InP quantum well. The AlGaAs/GaAs heterojunction is used for top gating, either to additionally reduce the dimensionality of the 2DEG to observe one dimensional effects, or to explore the edge channe
The solution and interfacial properties of an associative water-soluble cellulose derivative, ethyl(hydroxyethyl)cellulose (EHEC) have been investigated. Main themes have been to study the effect of hydrophobic modification of the polymer (HM-EHEC) and the interactions with surfactants, both in bulk and at interfaces. The association strength of the HM-EHEC network was found to be modulated by eit
Aim: Several studies have addressed the association between changes in the female sex hormones estrogen and progesterone levels and changes in parameters of periodontitis. In order to understand how these hormones affect periodontal health it is of major importance to obtain information on their physiological importance. We have previously shown that periodontal ligament cells (PDL cells) express
Short biographic entry, film actor Jarl Kulle.
Short biographic entry, Kjell Grede
In this article the authors suggest that chaos theory can provide us witha new perspective on archaeology. Newtonian thinking is predominantin archaeology, as well as in the humanities in general. This results inthe hegemony of analytic methods and a linear way of thinking on causeand effect. However, chaos theory has shown that behind many phen-omena that may seem random lies order. Since these c
A novel promoter system IX/AgOTf (X=Cl or Br) for thioglycoside activation has been developed (paper I-II). The promoter system has been evaluated in the synthesis of two GD3 bis-lactam fragments (paper III).
