Sökning: "locust"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet locust.

1. 1. Olfaction in Desert Locusts- Anatomy, Function and Plasticity of the Central Olfactory System

   Författare :Rickard Ignell; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hist; serotonin; immunocytochemistry; juvenile hormone; development; olfactometer; intracellular recording; evolution; projection neuron; receptor neuron; antennal lobe; aggregation pheromone; neuroethology; olfaction; Desert locust; Schistocerca gregaria; Ecology; Ekologi; Entomology; plant parasitology; Entomologi; växtparasitologi; Environmental chemistry; Miljökemi;

   Sammanfattning : The anatomy, function and plasticity of the primary olfactory centre, the antennal lobe (AL), of the desert locust Schistocerca gregaria was investigated using a number of neuroanatomical and neurophysiological methods. Anatomical characterisation of the AL in a number of orthopteran species made it possible to deduce a model concerning the evolution of microglomeruli. LÄS MER

3. 2. Odour detection in the desert locust, Schistocerca gregaria: antennal structure and function

   Författare :Samuel Adhola Ochieng'; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; insect antennae; Olfaction; chemoreceptors; receptor neuron; electrophysiology; aggregation pheromone; SEM; TEM; Djurfysiologi; Animal physiology; Animal ethology and psychology; Djurs etologi och psykologi;

   Sammanfattning : The desert locust, Schistocerca gregaria, is a polymorphic insect that occurs in two morphological and physiological distinct phases, solitary and gregarious, depending on population density. The two phases are reversible at any developmental stage. The gregarious phase produces and uses stage-specific pheromones, that keep the swarm together. LÄS MER

4. 3. Rheology and Microstructure of Mixed Biopolymer Gels

   Författare :Leif Lundin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; carrageenan; microstructure; rheology; xanthan; PCA; polysaccharide mixture; locust bean gum; transmission electron microscopy TEM ; multivariate analysis; viscoelastic measurements; PLS;

   Sammanfattning : The viscoelastic behaviour of biopolymer mixtures showing synergism was investigated under different physicochemical conditions using small deformation oscillatory measurements. In addition, the rheological properties of binary polysaccharide mixtures were related to the microstructure as observed using transmission electron microscopy. LÄS MER

5. 4. Cellular immune reactions in the desert locust Schistocerca gregaria infected by the fungus Metarhizium anisopliae

   Författare :Stefan Gunnarsson; Uppsala universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : .... LÄS MER

7. 5. Sexual selection and the evolution of sex-role reversal in honeylocust beetles

   Författare :Karoline Fritzsche; Göran Arnqvist; Adam Jones; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal Ecology; Zooekologi;

   Sammanfattning : Sexual selection is the prime evolutionary force that makes males and females different. This process has long been viewed as one where male compete with one another and where females choose. LÄS MER