Sökning: "PBP"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet PBP.

  1. 1. Molecular aspects of pheromone evolution in moths

    Författare :David Abraham; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ekologi; 28S genephylogenetic reconstruction pheromone types; ND1 genes; PBP; Pheromone-binding protein genes; Drepanidae; Noctuidae; Geometridae; Lepidoptera; Insect; Evolution; Olfaction; Ecology;

    Sammanfattning : Moths rely on the sense of smell (olfaction) as the main sensory input system in search for potential food sources and in selection of suitable females by males. Specific pheromones are fundamental to the reproductive isolation of species and consequently the olfactory system of moths has evolved to a high level of sensitivity and specificity. LÄS MER

  3. 2. Penicillin-Nonsusceptible Streptococcus pneumoniae in Malmö, Sweden. Aspects of Epidemiology, Microbiology and Genetics

    Författare :Percy Nilsson Wimar; Preventiv pediatrik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicine human and vertebrates ; Day-care centers; Streptococcus pneumoniae; Penicillin-nonsusceptible; Medicin människa och djur ;

    Sammanfattning : S. pneumoniae is a major cause of common diseases such as acute otitis media and pneumonia, as well as more serious illnesses like septicemia and meningitis. The increasing level of resistance in pneumococci threatens to change the tradition of treating common respiratory infections with narrow-spectrum penicillin. LÄS MER

  4. 3. Characterizations of ground flashes from tropic to northern region

    Författare :Zikri Abadi Baharudin; Vernon Cooray; Mahbubur Rahman; Farhad Rachidi; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Positive negative cloud-to-ground lightning flashes; Initiation position; slow field changes; close ground flashes; preliminary breakdown process; Engineering Science with specialization in Atmospheric Discharges; Teknisk fysik med inriktning mot atmosfäriska urladdningar;

    Sammanfattning : This thesis portrays new information concerning the cloud-to-ground (CG) lightning flashes or ground flashes produced by thunderclouds. It emphasizes the importance of characterizing lightning studies as the relationship between lightning mechanisms, and of incorporating the influence of geographical location, latitude and storm type. LÄS MER

  5. 4. Carbapenem resistance in Pseudomonas aeruginosa

    Författare :Christian Giske; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Carbapenem (imipenem and meropenem) resistance in Pseudomonas aeruginosa is increasing, with global resistance rates approaching 20%. The most common resistance mechanisms are down-regulation of the porin OprD, and increased activity of multi-drug efflux pumps, primarily MexAB-OprM. LÄS MER

  7. 5. Features of the Electric Fields Generated by Lightning with Special Attention to Positive Ground Flashes

    Författare :Dalina Johari; Vernon Cooray; Mahbubur Rahman; Fridolin Heidler; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; positive ground flashes; preliminary breakdown pulses; multiple-trains PBPs; positive leader; bidirectional leader; negative leader branch; subsequent return strokes; distant lightning; Engineering Science with specialization in Atmospheric Discharges; Teknisk fysik med inriktning mot atmosfäriska urladdningar;

    Sammanfattning : This thesis focuses on the main processes in positive ground flashes and the distant lightning environment for both positive and negative ground flashes. It presents the characteristics of the preliminary breakdown pulses (PBPs), the characteristics of the electric field pulses observed during leader propagation, and the characteristics of the electric fields produced by the first and the subsequent return strokes. LÄS MER