Search for dissertations about: "simultaneous negative contrast"

Showing result 1 - 5 of 9 swedish dissertations containing the words simultaneous negative contrast.

  2. 1. Food choice in fallow deer – experimental studies of selectivity

    Author : Ulrika Alm Bergvall; Olof Leimar; Frederick D. Provenza; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; behavioural syndrome; neighbour contrast defence; neighbour contrast susceptibility; simultaneous negative contrast; plant secondary compounds; tannins; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Abstract : In this thesis, I experimentally investigate feeding selectivity in fallow deer (Dama dama), with respect to plant secondary compounds, especially tannins, which can decrease the quality of foods. I found that fallow deer avoided foods with higher amounts of tannic acid and Quebracho tannin, even though the deer ate some high-tannin food. READ MORE

  4. 2. Peripheral Optics of the Human Eye:Applied Wavefront Analysis

    Author : Dmitry Romashchenko; Linda Lundström; Peter Unsbo; Geunyoung Yoon; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Optik och fotonik; Optics and Photonics;

    Abstract : I denna avhandling används vågfrontsanalys för att studera ögats perifera optik med betoning på dess betydelse för utvecklingen av närsynthet (myopi). Syftet är att hitta egenskaper i den perifera bildkvalitén som skulle kunna användas av ögat för att reglera dess tillväxt. READ MORE

  5. 3. Cell death and signal transduction pathways in Alzheimer's disease : the role of presenilin 1

    Author : Bogdan O Popescu; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Mutated presenilins (PSs) may cause familial Alzheimer's disease (FAD) by altering neuronal signal transduction pathways, by increasing AP production or by triggering a number of proapoptotic mechanisms. The present thesis explores mechanisms by which PSs regulate signal transduction and cell death with relevance to AD. READ MORE

  6. 4. Ab initio Investigation of Face-centered cubic High-Entropy Alloys

    Author : Xun Sun; Levente Vitos; Torbjörn Björkman; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ab initio; high-entropy alloys; twinning; martensitic transformation; elastic properties; phase stability; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : High-entropy alloys (HEAs) represent a special group of solid solutions containing five or more principal elements. The new design strategy has attracted extensive attention from the materials science community. The design and development of HEAs with desired properties have become an important subject in materials science and technology. READ MORE

  7. 5. ATP Dynamics in Pancreatic α- and β-cells

    Author : Jia Li; Anders Tengholm; Erik Gylfe; Hindrik Mulder; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ATP; Ca2 ; β-cell; α-cell; SERCA; SOCE; muscarinic receptor; insulin secretion; glucagon secretion; Medical Cell Biology; Medicinsk cellbiologi;

    Abstract : Glucose metabolism in pancreatic α- and β-cells is believed to regulate secretion of glucagon and insulin, respectively. In β-cells, ATP links glucose metabolism to electrical activity and insulin secretion. READ MORE