Sökning: "Pheromones"

Visar resultat 1 - 5 av 49 avhandlingar innehållade ordet Pheromones.

  1. 1. Human Pheromones : Psychological and Neurological Modulation of a Putative Human Pheromone

    Författare :Johan N. Lundström; Mats J. Olsson; Noam Sobel; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Psychology; Pheromones; Odor; Olfaction; Sensitivity; Psychophysiology; Attention; ERP; Mood; Androstadienone; Estratetraenol; Bimodal distribution; Speed of processing; Psykologi; Psychology; Psykologi;

    Sammanfattning : The notion that humans have specialized chemicals used for communication between conspecifics, so-called pheromones, has attracted much attention and discussion. This thesis demonstrates in four separate studies that a human endogenous steroidal compound that is abundant in male sweat, androstadienone, affects women in several ways that differ to that of common odors. LÄS MER

  3. 2. Amino acids with relevance to health, climate and the environment : Development of mass spectrometric methods

    Författare :Javier Zurita; Leopold Ilag; Ulrika Nilsson; Margareta Törnqvist; Natalia Tretyakova; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; amino acids; LC MS; fixed-charge derivatization; BMAA; chiral separation; pheromones; arctic aerosols; serum albumin adducts; benzo[a]pyrene diol epoxides; high-resolution MS; Analytical Chemistry; analytisk kemi;

    Sammanfattning : Amino acids play vital roles in health, either in their native form or chemically modified. Some studies have linked certain non-proteinogenic amino acids to neurodegenerative diseases, such as in the case of β-methylaminoalanine (BMAA). LÄS MER

  4. 3. The importance of search behavior and movements for spatial distributions of herbivorous insects

    Författare :Petter Andersson; Peter Hambäck; Johan Ehrlén; Tomas Roslin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Olfactory search; Habitat heterogeneity; Species-traits; Immigration; Scaling relationships; Patch size; Plant-insect interactions; EAG; Odors; Pheromones; Plant Ecology; växtekologi;

    Sammanfattning : Insect populations commonly show large spatial variation in density, and much variation have been shown to be explained by the search behavior applied by the insect when locating habitat patches. This thesis explores the importance of odor-mediated attraction for immigration rates of herbivorous insects in relation to the size of the patches and the density of host plants within the patches. LÄS MER

  5. 4. Pheromonal Mediated Behaviour and Endocrine Responses in Salmonids : The impact of Cypermethrin, Copper, and Glyphosate

    Författare :Alia Jaensson; Ingvar Brandt; Håkan Olsen; Kjell Döving; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cypermethrin; copper; glyphosate; behaviour; hormones; pheromones; olfaction; 11-ketotestosterone 11-KT ; 17α; 20β-dihydroxy-4-pregnen-3-one 17; 20β-P ; reproduction; Toxicology; Toxikologi; Biologi med inriktning mot ekotoxikologi; Biology with specialization in Environmental Toxicology;

    Sammanfattning : The effects of cypermethrin, copper and glyphosate on the endocrine system and subsequent response to female pheromones were investigated in mature male brown trout (Salmo trutta) parr.  Responses measured were the amount of strippable milt, blood plasma levels of both an androgen (11-ketotestosterone (11-KT)) and a progestin (17α,20β-dihydroxy-4-pregnen-3-one (17,20b-P)), and behavioural changes. LÄS MER

  7. 5. Odour Communication in Pieris Butterflies

    Författare :Johan Andersson; KTH; []
    Nyckelord :Pieris; sexual selection; pheromones; methyl salicylate; indole; benzyl cyanide; solid-phase micro extraction;

    Sammanfattning : .... LÄS MER