Sökning: "Headspace"

Visar resultat 16 - 20 av 30 avhandlingar innehållade ordet Headspace.

  1. 16. Structuring porous adsorbents and composites for gas separation and odor removal

    Författare :Neda Keshavarzi; Lennart Bergström; Kurosch Rezwan; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Structure; pulsed current processing; zeolite; aluminophosphate; activated carbon; CO2 separation; adsorption; durability; cellulose; film; coating; Materials Chemistry; materialkemi;

    Sammanfattning : Porous zeolite, carbon and aluminophosphate powders have been colloidally assembled and post-processed in the form of monoliths, flexible free standing films and coatings for gas separation and odor removal. Zeolite 13X monoliths with macroporosites up to 50 vol% and a high CO2 uptake were prepared by colloidal processing and sacrificial templating. LÄS MER

  3. 17. Olfactory mechanisms of host selection in phytophagous insects : behavior, neuron, and receptor

    Författare :Muhammad Binyameen; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The most challenging tasks for phytophagous insects are the location and selection of mates, food sources, and oviposition sites, all crucial for survival and reproduction. To perform these tasks insects rely largely on their sense of smell (olfaction). LÄS MER

  4. 18. Influence of herbivore-induced changes in host plants on reproductive behaviours in Spodoptera littoralis : herbivore-plant interactions

    Författare :Ali Zakir; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Insect herbivores orient towards host plants using sensory cues and olfaction plays a major role, especially in nocturnal herbivores, during selection of host plants suitable for feeding, mating and oviposition. Plants defend themselves from herbivore feeding by producing volatiles as well as non-volatiles chemical compounds. LÄS MER

  5. 19. Influence of Oxygen Concentration on Lipid Oxidation in Food during Storage

    Författare :Kristina Andersson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Lipid oxidation in cream powder and rapeseed oil was studied at different oxygen concentrations in the presence or absence of the catalytic factors light and copper. The oxygen concentrations in the headspace of the product ranged from 21 % down to 0.03 %, but particular emphasis was laid on oxygen concentrations below 2 %. LÄS MER

  7. 20. Chemical signals in interactions between Hylobius abietis and associated bacteria

    Författare :Karolin Axelsson; Jenny Lindh; Anna-Karin Borg-Karlson; Gunaratna Kuttuva Rajarao; Benedicte Albrectsen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Pine weevil; Hylobius; Rahnella; Pseudomonas; bacteria; fungi; metabolites; 2-methoxyphenol; 2-phenylethanol; Kemi; Chemistry;

    Sammanfattning : The pine weevil (Hylobius abietis L.) is one of the two topmost economically important insect pests in Swedish conifer forests. The damage increase in areas were the silvicultural practice is to use clear cuttings were the insects gather and breed. LÄS MER