Sökning: "isolation"

Visar resultat 1 - 5 av 952 avhandlingar innehållade ordet isolation.

  1. 1. Isolation and chemical modification of arabinoxylan and galactoglucomannan

    Författare :Linda Härdelin; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tg; Films; Material properties; Isolation; Etherification; Modification; PEGylation; Hemicellulose;

    Sammanfattning : Today’s society is based on the use of fossil fuels, where oil is used as transportation fuel and as raw material in the petrochemical industry. Efforts are made to increase the use of bio-based materials, since oil is a non-renewable source and a greenhouse gas contributor. LÄS MER

  3. 2. Isolation, Characterization and Material Properties of Arabinoxylan from Barley

    Författare :Anders Höije; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chemical structure; moisture content; film formation; Arabinoxylan; isolation; mechanical properties; oxygen permeability;

    Sammanfattning : The growing amount of household waste and the limited supply of fossil fuel on earth make it important to find renewable resources for the production of biodegradable polymers for a variety of applications, particularly as packaging and other disposable products. Hemicelluloses are important components in all plants and the second most abundant plant biopolymers on earth. LÄS MER

  4. 3. Natural and Sexual Selection in a Natural Hybrid Zone of Ficedula Flycatchers

    Författare :Nina Svedin; Anna Qvarnström; Lars Gustafsson; Ian Owens; Uppsala universitet; []
    Nyckelord :Biology; postzygotic isolation; prezygotic isolation; asymmetrical isolation; sexual signals; hybrid fitness; co-existence; Biologi;

    Sammanfattning : Speciation can be viewed as the formation of reproductive barriers between different populations. This thesis investigates patterns of natural and sexual selection shaping reproductive barriers between two hybridizing flycatchers (i.e. collared – and pied flycatchers). LÄS MER

  5. 4. Isolation, characterization and enzymatic hydrolysis of water-soluble wood polysaccharides

    Författare :Jon Lundqvist; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; size exclusion chromatography; beta-mannosidase; beta-mannanase; endoglucanase; ethyl hydoxyethyl cellulose; metabolism; Biokemi; Biochemistry; Metabolism; microwave irradiation; O-acetyl-galactoglucomannan; isolation;

    Sammanfattning : The need for new renewable products has enhanced the interest in cellulose and hemicellulose as raw material. The wood plant cell wall is a complex mixture of cellulose, hemicellulose, lignin and minor amounts of pectin, proteins and extractives. Several interactions between the compounds make them difficult to separate without modification. LÄS MER

  7. 5. Flotation-REST (Restricted Environmental Stimulation Technique) in the age of anxiety : Exploring the role and treatment applications of sensory isolation in the modern world

    Författare :Kristoffer Jonsson; Anette Kjellgren; Torsten Passie; Karlstads universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Flotation-REST; Sensory isolation; Sensory deprivation; Anxiety; Generalized anxiety disorder; Complementary and alternative medicine; Flyt-REST; sinnes-isolation; sensorisk deprivation; generaliserat ångest syndrom; komplementär och alternativ medicin; Psykologi; Psychology;

    Sammanfattning : Anxiety and the use of Complementary and Alternative Medicine (CAM), such as flotation-REST, have increased markedly during the last decades. Anxiety is reportedly a prevalent incentive for the use of CAMs, despite the present low state of knowledge about their safety and efficacy. LÄS MER