Search for dissertations about: "compound specific isotope analysis"

Showing result 1 - 5 of 7 swedish dissertations containing the words compound specific isotope analysis.

2. 1. Compound-specific stable chlorine isotope analysis : A versatile tool for investigating biochemical and geochemical processes of organochlorine substances

   University dissertation from Stockholm : Institutionen för tillämpad miljövetenskap (ITM)

   Author : Henry Holmstrand; Per Andersson; Örjan Gustafsson; Neil Sturchio; [2006]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; compound-specific chlorine isotope analysis; chlorinated organic compounds; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi;

   Abstract : Chlorinated organic compounds (OCls) from anthropogenic sources are generally considered to be a class of chemicals with high potential for ecotoxicity, including infamous substances such as polychlorinated biphenyls (PCB), dichloro-dibenzo-trichloroethane (DDT) and polychlorinated dibenzo-p-dioxins (PCDD). OCls are also produced naturally, sometimes at the same order of magnitude as anthropogenic compounds. READ MORE

4. 2. Compound-specific bromine isotope analysis of methyl bromide using GC-multiple collector mass spectrometry

   University dissertation from Stockholm University

   Author : Axel Horst; Örjan Gustafsson; David Bastviken; Ulla Sellström; [2012]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : The isotopic composition of ozone depleting methyl halides may provide valuable information on the sources and sinks of these compounds. However, so far mostly stable carbon isotope analysis of methyl chloride and methyl bromide has been at­tempted. READ MORE

5. 3. Species interactions and energy transfer in aquatic food webs

   University dissertation from Stockholm : Department of Ecology, Environment and Plant Sciences, Stockholm University

   Author : Jens Munk Nielsen; Monika Winder; Sture Hansson; Michael T. Brett; [2015]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Aquatic food webs; zooplankton; stable isotope analysis amino acids; molecular diet analysis; marin ekologi; Marine Ecology;

   Abstract : Food webs are structured by intricate nodes of species interactions which govern the flow of organic matter in natural systems. Despite being long recognized as a key component in ecology, estimation of food web functioning is still challenging due to the difficulty in accurately measuring species interactions within a food web. READ MORE

6. 4. Application of two dimensional compound specific carbon-chlorine isotope analyses for degradation monitoring and assessment of organic pollutants in contaminated soil and groundwater

   University dissertation from Stockholm : Department of Applied Environmental Science (ITM), Stockholm University

   Author : Charline Wiegert; Örjan Gustafsson; Thomas Hofstetter; [2013]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; organochlorines; chlorinated ethenes; PCE; TCE; hexachlorocyclohexanes; soil contamination; groundwater contamination; remediation; natural attenuation; biodegradation; carbon isotopes; chlorine isotopes; CSIA; Applied Environmental Science; tillämpad miljövetenskap;

   Abstract : Nearly 250,000 sites with past and present potentially polluting activities need urgent remediation within Europe. Major pollutants include organochlorines (OCls), e.g. chlorinated ethenes (CEs) and hexachlorocyclohexanes (HCHs), mainly used as industrial solvents and pesticides, respectively. READ MORE

7. 5. Reconstruction of the Southeast Asian hydro-climate using biomarkers and their hydrogen isotopic composition

   University dissertation from Stockholm : Department of Applied Environmental Science (ITM), Stockholm University

   Author : Yamoah Kweku Kyei Afrifa; Rienk Smittenberg; Barbara Wohlfarth; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; geokemi; Geochemistry;

   Abstract : Southeast Asia is characterized by a monsoonal climate, with distinct wet and dry seasons. This has great impact on societies, agriculture and infrastructures. READ MORE