Sökning: "stoichiometry"

Visar resultat 16 - 20 av 131 avhandlingar innehållade ordet stoichiometry.

  1. 16. Spectroscopic studies of colloidal ZnS

    Författare :Rune Gärd; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry of Interfaces; Gränsytors kemi;

    Sammanfattning : This thesis is a summary and discussion of four papers, mainly dealing with reactions at the ZnS/water interface. The main analysis method has been spectroscopy. In mineral concentration plants valuable minerals are rendered hydrophobic by the action of certain surface active molecules, so called collectors. LÄS MER

  3. 17. Consequences of consumer-resource stoichiometric imbalance in planktonic food webs

    Författare :Junwen Guo; Mehdi Cherif; Tanguy Daufresne; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; environmental science; miljövetenskap;

    Sammanfattning : Resource imbalance between consumers and their resources can come from inadequate resource quantity or quality. The ecological stoichiometry theory focuses on understanding the consequences of imbalance in elemental composition.  In this thesis, I have used both resource quality (e.g. LÄS MER

  4. 18. ZrB2 Thin Films : Growth and Characterization

    Författare :Lina Tengdelius; Hans Högberg; Urban Forsberg; Gregory S. Girolami; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Zirconium diboride, ZrB2, is a ceramic material with bulk properties such as high melting point (3245 °C), high hardness (23 GPa), and low resistivity (~8 μΩcm). Thin film growth of ZrB2 using physical vapor deposition has suffered from problems with films deviating from stoichiometry and with high levels of contaminants, especially high oxygen content. LÄS MER

  5. 19. Preparation of Functional Oxide Perovskites: A Study on the Growth-Microstructure-Property Relationships of(N a,K)NbOx Thin Films

    Författare :Veronika Mozhdeh Kugler; S. Ismat Shah; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Sodium-potassium niobate is a material with ferroelectric and piezoelectric properties that has been known since 1954. Recently, perovskite structured ferroelectric thin films have gained a lot of attention due to their wide area of potential applications, including non-volatile memories, infrared sensors, optical switches, and ultrasonic transducers. LÄS MER

  7. 20. Fundamental Studies on Molecularly Imprinted Materials

    Författare :Kerstin Golker; Ian A. Nicholls; Ken J. Shea; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemometrics; molecular dynamics; molecularly imprinted polymer; molecular imprinting; morphology; polymer; principal component analysis;

    Sammanfattning : The thesis focuses on fundamental studies aimed at elucidating factors that influence molecularly imprinted polymer (MIP) formation and ligand recognition. To this end, a series of computational techniques, in particular chemometrics and molecular dynamics (MD) in conjunction with polymer synthesis and physical characterization studies have been employed. LÄS MER