Sökning: "bristles"

Hittade 4 avhandlingar innehållade ordet bristles.

  1. 1. Mating behaviour in Drosophila melanogaster and its implication to genetic variation

    Författare :Sven-Eric Åslund; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; drosophila melanogaster; mating behaviour; fitness; allozymes; bristles; Y chromosome; polymorphism; selection;

    Sammanfattning : Not much is known about the mechanisms affecting the genetic composition of populations of different species. To investi­gate one of these potential mechanisms, mating behaviour, the fruit fly Drosophila melanogaster, was chosen as an experimen­tal animal. LÄS MER

  3. 2. Neuromechanical basis of airflow-dependent antennal positioning in hawkmoths

    Författare :Dinesh Natesan; Örjan Ekeberg; Sanjay P. Sane; Volker Dürr; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; insect antennae; antennal positioning; antennal hair plates; Böhm’s bristles; Johnston’s organs; control theory; hierarchical neural circuits; tuneable feedback loop; flexible reflexes; Computer Science; Datalogi;

    Sammanfattning : Fast behaviors, seen in varied life forms, are often considered to be stereotypic and reflexive and the control neural circuits to be hard-wired. However, many such reflexes have been shown to respond in a context-dependent manner. LÄS MER

  4. 3. Overcoming the Barriers of Fine-Needle Aspiration

    Författare :Filipe Marques; Niclas Roxhed; Heikki J. Nieminen; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cysts; Cystic fluid; Pancreatic Cancer; Fine-needle Aspiration; Early diagnosis; Surgical instruments; Nitinol; Absorbable sutures; Loop brush; Cythopathology; Rapid on-site evaluation; Microfluidics; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Cysts, closed sac-like structures filled with fluid or air, can form anywhere in the body. In the majority of cases, cysts are benign (not cancerous). However, these structures can also be precursors of cancer, pointing to the location where cancer can originate. LÄS MER

  5. 4. Ultrastructural and systematic studies of cecidomyiidae (Diptera)

    Författare :Ruben Tastás-Duque; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Gallmyggor; tvåvingar; cecidomyiidae; diptera;

    Sammanfattning : Examination of the abdomen of the adult female and the head capsule of the mature larva indicates the grat utility of the Scanning Electron Microscope (SEM) in examining structures when searching for useful characters to deal with the taxonomy and phylogeny of gall midges (Diptera: Cecidomyiidae). Some of the structures found represent adaptations of limited value for phylogenetic considerations at higher levels. LÄS MER