Sökning: "137Cs"

Visar resultat 6 - 10 av 27 uppsatser innehållade ordet 137Cs.

1. 6. Records of environmental change and sedimentation processes over the last century in a Baltic coastal inlet

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Hanna Nilsson; [2019]
   Nyckelord :Baltic Sea; eutrophication; coastal areas; archipelago; laminated sediments; nutrient inputs; carbon and nitrogen content; biogenic silica; sedimentation; environmental impact; marine geology; Earth and Environmental Sciences;

   Sammanfattning : The marine ecosystem in the Baltic Sea is affected by multiple stress factors, e.g. eutrophication and deoxygenation, overfishing and anthropogenic pollution. Here we evaluate the short-term trends of dissolved oxygen in bottom waters and changes in the primary productivity within a coastal inlet in the Baltic Sea. LÄS MER

3. 7. Geochemical and palaeomagnetic characteristics of a Swedish Holocene sediment sequence from Lake Storsjön, Jämtland

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Joakim Robygd; [2015]
   Nyckelord :Jämtland; geochemistry; palaeomagnetism; PSV; sedimentation rate; Holocene development; geochronology; climate change; Earth and Environmental Sciences;

   Sammanfattning : As a part of a French-Swedish collaboration project to reconstruct middle to northern European climate variations during the Holocene, a sediment sequence from Lake Storsjön, Jämtland was retrieved and analysed for geochemical and palaeomagnetic properties. The subsampled sequence, composed of one freeze core and three Niederreiter piston cores, revealed information of both climatic, environmental and anthropogenic changes over the past 10,800 years. LÄS MER

4. 8. Assessment of radionuclide content in waste barrels using the Canberra In-Situ Object Counting System (ISOCS)

   Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen; Lunds universitet/Medicinsk strålningsfysik, Lund

   Författare :Marcus Persson; [2015]
   Nyckelord :Medicine and Health Sciences;

   Sammanfattning : In order to store radioactive waste its contents need to be known. Determining radioactive waste can be achieved by different means. The most common method is using a detector to measure the gamma photons produced by the radionuclides in the waste. LÄS MER

5. 9. Effekter av lågdosbestrålning vid p53-medierad celldöd

   Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

   Författare :SOLWEIG ORSAN EGNERFORS; [2015]
   Nyckelord :PRIMA-1; 137Cs; p53; synergy; hypersensitivity;

   Sammanfattning : The aim of the study was to investigate if PRIMA-1, a drug that reactivate the tumour suppressor gene p53, will have a synergistic effect when used in combination with γ-irradiation in a human small cell lung cancer cell line (U-1690), which show a low-dose hypersensitivity in clonogenic survival experiments. Clonogenic cell survival after incubation with PRIMA-1 alone in concentrations from 0. LÄS MER

7. 10. Influence of depositional mobility (downwashing) on the accumulation of atmospherically supplied elements in peat cores: an experimental approach

   Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Keyao Chen; [2014]
   Nyckelord :;

   Sammanfattning : The potential influence of downwashing on atmospherically deposited elements is of rare focus compared with other geochemical processes related to peat. Downwashing may cause a rapid downward movement of atmospherically supplied elements before they bond to the peat organic substrate and thus reduce the reliability of age-depth models that rely on atmospherically supplied radioisotopes (e. LÄS MER