Search for dissertations about: "occurrence"
Showing result 21 - 25 of 1737 swedish dissertations containing the word occurrence.
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21. Source, occurrence, and fate of pharmaceuticals in natural waters
Abstract : The consumption of pharmaceuticals has increased in the last few decades. After usage, pharmaceuticals are excreted via urine and feces and transported to wastewater treatment plants (WWTPs) where they are subjected to treatment processes, and finally discharged into rivers. READ MORE
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22. Factors related to the occurrence of gastric adenocarcinoma subtypes
Abstract : Gastric cancer is the second most common cancer worldwide, but the etiology remains poorly understood. A spontaneous global decline has reduced the number of victims in most Western countries while Japan and China have screening programs in place due to the magnitude, and the serious prognosis, of this malignant disease. READ MORE
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23. Occurrence and fate of emerging and legacy flame retardants : from indoor environments to remote areas
Abstract : Persistent organic pollutants (POPs) are toxic chemicals that can be found in various matrices in all corners of the planet, including remote areas such as the Arctic. Several POPs are known and monitored but given the abundance of new chemicals in commerce about which little is known, chemicals that may be new POPs are constantly being screened for. READ MORE
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24. The impact of lifestyles on the occurrence of dementia
Abstract : This thesis explored the impact of different lifestyles in late life on the occurrence of Alzheimer's disease (AD) or dementia. Smoking, vitamin B12 and folate in relation to AD have been extensively studied, but the results are inconsistent. Research concerning the association between dementia and social network or social activities is scarce. READ MORE
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25. Environmental risk factors for the occurrence of multiple sclerosis
Abstract : Background. Multiple sclerosis (MS) is an inflammatory and degenerative disease of the central nervous system that typically debuts around age 30. About 2.3 million people are affected in the world today, and besides trauma it is the most common cause of neurological disability among young adults in the western world. READ MORE