Sökning: "seed shapes"

Hittade 5 avhandlingar innehållade orden seed shapes.

  1. 1. Variation in Silene vulgaris and S. uniflora (Caryophyllaceae): genetic diversity, gene flow and habitat selection

    Författare :Helena Runyeon; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; taxonomy; Systematic botany; seed shapes; morphology; allele frequencies; hybridization; immigration history; allozymes; genetic diversity; geographic variation; Silene; Caryophyllaceae; phytogeography; chemotaxonomy. Physiology of nonvascular plants; Systematisk botanik; taxonomi; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

    Sammanfattning : Genetic and morphometric variation was studies in the three closely-related taxa Silene vulgaris (a widespread weed), S. uniflora ssp. uniflora (restricted to coastal habitats) and S. uniflora ssp. LÄS MER

  3. 2. Shape Control Synthesis and Microstructure Studies of Metal Nanoparticles

    Författare :Xin Wen; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hexadecyltrimethylammonium bromide; sodium oleate; polyvinylpyrrolidone; Gold nanorod; palladium nanodendrite; seed mediated growth; transmission electron microscopy; hexadecyltrimethylammonium chloride;

    Sammanfattning : Metal nanoparticles have been extensively studied in recent years due to their unique chemical, biological and physical properties. Gold (Au) and palladium (Pd) nanoparticles are two of the most popular materials because Au nanoparticles have a strong localized surface plasmon resonance effect and Pd nanoparticles have high hydrogen adsorption and chemical catalytic capacities. LÄS MER

  4. 3. Heterogeneous Film-Forming Latexes : Preparation - Morphology - Mechanical Properties

    Författare :Ola Karlsson; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; core-shell; particle morphology; heterogeneous latexes; particle size; crosslinking; hydrophilicity; poly isoprene-co-styrene-co-methacrylic acid ; monomer partitioning; internal particle viscosity; transmission electron microscopy TEM ; calorimetric reactor; two-stage; seeded emulsion polymerization; film morphology; mechanical properties; paper coating.; Polymer technology; biopolymers; Polymerteknik;

    Sammanfattning : This thesis describes the preparation of heterogeneous latexes, which may serve as binders in coating applications, and the characterization of these. The latexes were prepared in two-stage seeded emulsion polymerization. LÄS MER

  5. 4. Production, local trade and diversity of avocado (Persea americana Mill.) in the southern highlands of Tanzania

    Författare :Ibrahim Juma; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Avocado (Persea americana Mill) has a long cultivation history in Tanzania and adds to the country’s revenue through trading within (local and commercial avocado cultivars) and outside (commercial cultivars) the country. Research has been, however, scanty to characterize the country’s avocado production, local trading and diversity. LÄS MER

  7. 5. Segmentation of knots : a problem in 3D X-ray scanning of logs

    Författare :Katarina Flood; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis investigates the possibilities of using 3D X-ray tomography to detect and segment knots in logs. In the sawmill process this should be done previously to the sawing the log into boards. LÄS MER