Sökning: "pesticides"

Visar resultat 11 - 15 av 122 avhandlingar innehållade ordet pesticides.

  1. 11. Development of Enhanced Analytical Methodology for Lipid Analysis from Sampling to Detection : A Targeted Lipidomics Approach

    Författare :Giorgis Isaac; Jonas Bergquist; Karin Markides; Monica Waldebäck; William Christie; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; electrospray ionization; lipids; liquid chromatography; mass spectrometry; pesticides; phosphatidylcholine; pressurized fluid extraction; sphingomyelin; sulfatides; Analytisk kemi; Analytical chemistry; Analytisk kemi;

    Sammanfattning : This thesis covers a wide range of analytical method development for lipid analysis in complex biological samples; from sample preparation using pressurized fluid extraction (PFE) and separation with reversed phase capillary liquid chromatography (RP-LC) to detection by electrospray ionization mass spectrometry (ESI/MS) and tandem MS.The requirements for fast, reliable and selective extraction methods with minimal usage of solvents have accelerated the development of new extraction techniques. LÄS MER

  3. 12. Risk assessment of chemical mixtures in the aquatic environment

    Författare :Mikael Gustavsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemical mixtures; Risk assessment; Pesticides; Industrial chemicals; REACH; Chemical monitoring;

    Sammanfattning : The total chemical production within the European Union amounts to more than 300 million tonnes per year, of which 140 million tonnes are considered as hazardous to the environment. In order to ensure that these chemicals do not have harmful effects under normal use, likely environmental concentrations are compared to assumed environmentally safe concentration, and only if the resulting risk is deemed acceptable is the product or chemical allowed for use. LÄS MER

  4. 13. Protecting food with poison : Exploring ecotoxicity of agrochemicals and pharmaceuticals

    Författare :Oskar Nyberg; Michael Tedengren; Peter Fantke; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LCA; ecotoxicology; uncertainty; antibiotics; aquaculture; pesticides; Ecotoxicology; ekotoxikologi;

    Sammanfattning : Chemicals are being emitted into the environment through human activities, such as agriculture or animal husbandry. Emissions can either occur intentionally, as pesticide application of crops, or inadvertently, such as pharmaceutical residues in wastewater effluents. LÄS MER

  5. 14. Environmental Contaminants and Obesity

    Författare :Monika Rönn; P. Monica Lind; Lars Lind; Jan Örberg; Merete Eggesbø; Uppsala universitet; []
    Nyckelord :Fischer 344; rat; obesity; adipose tissue; persistent organic pollutants; POPs; bisphenol A; BPA; pesticides; dioxin; PCB; DDT; apo A-I; adiponectin; leptin; ghrelin;

    Sammanfattning : Obesity is a worldwide problem affecting both children and adults. Genetic, physiological, environmental, psychological, social and economic factors interact in varying degrees, influencing body weight and fat distribution and the progress of obesity. LÄS MER

  7. 15. Costa Rican coffee and bananas : A social-ecological study of management practices and their effects on the environment

    Författare :Angelina Sanderson Bellamy; Micheal Tedengren; Charles Francis; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Costa Rica; coffee; banana; production system; pesticides; organic; conventional; Rainforest Alliance certification; Biology; Biologi; marin ekotoxikologi; Marine Ecotoxicology;

    Sammanfattning : This thesis investigates the variability in management practices on coffee and banana farms in an attempt to identify practices that reduce the environmental impact of export crop production. Different banana production systems are studied to determine their level of environmental impact. LÄS MER