Sökning: "SUBSTANCES"

Visar resultat 1 - 5 av 1154 avhandlingar innehållade ordet SUBSTANCES.

1. 1. Novel Psychoactive Substances : Experienced effects, attitudes, and motivations among online drug community users

   Författare :Christophe Soussan; Anette Kjellgren; Anna Stigsdotter Neely; Torsten Passie; Karlstads universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Novel psychoactive substances; drugs; legal highs; Internet; forum; ethylphenidate; discussions; motivations; harm reduction; substance displacement; Psykologi; Psychology;

   Sammanfattning : The aim of the present research is to contribute to the bridging of the knowledge gap pertaining to the field of Novel Psychoactive Substances (NPS) and its online community of users. The findings demonstrate that the community is characterized by robust group cohesiveness and counter public attitudes. LÄS MER

3. 2. Colloidal carrier substances : Properties and impact on trace metal distribution in natural waters

   Författare :Anna Ledin; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

   Sammanfattning : Colloidal (0,45 J.Im) are important constituents in the aquatic environment, due to their impact on the mobility and bioavailability of associated components (e.g. metals). LÄS MER

4. 3. Radiosynthesis of Perfluoroalkyl Substances : Chemical analysis, uptake, distribution, and partitioning studies

   Författare :Maria Sundström; Åke Bergman; John Butenhoff; Stefan Nobel; Johan Eriksson; Christopher Lau; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PFOS; PFOA; PFBS; miljökemi; Environmental Chemistry;

   Sammanfattning : Perfluoroalkyl substances (PFASs) are widely utilized manmade chemicals. Their properties have made them highly appreciated in a variety of industrial and consumer product applications, including fire-fighting foams, hydraulic fluids, as well as in cookware and food contact papers. LÄS MER

5. 4. Wastewater treatment from pharmaceutical substances with filamentous fungi

   Författare :Brigita Dalecka; Gunaratna Kuttuva Rajarao; Talis Juhna; Paul Van der Wielen; Lima Nelson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Filamentous fungi; municipal wastewater; pharmaceutical substances; fungal fluidized bed pelleted bioreactor; nutrients; diclofenac; ketoprofen; Trametes versicolor; Aspergillus luchuensis; Filamentösa svampar; kommunalt avloppsvatten; läkemedelsrester; bioreaktor; näringsämnen; diklofenak; ketoprofen; Trametes versicolor; Aspergillus luchuensis; Mikroskopiskās sēnes; sadzīves notekūdeņi; farmaceitiskās vielas; mikroskopisko sēņu bioreaktors; diklofenaks; ketoprofens; Trametes versicolor; Aspergillus luchuensis; Bioteknologi; Biotechnology;

   Sammanfattning : The ever-increasing concern about the widespread occurrence of pharmaceutical substances in the aquatic environment has been recognized as an emerging environmental issue as it can cause undesirable effects on the ecosystem and human health. The current wastewater treatment methods are not designed to treat municipal wastewater from the contamination of various pharmaceutical substances. LÄS MER

7. 5. Hazardous substances in wastewater systems : a delicate issue for wastewater management

   Författare :Helena Palmquist; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering;

   Sammanfattning : Many substances derived from human activity end up in wastewater systems at some point. A large number of different substances - up to 30,000 - are present in wastewater. Some of them are valuable, such as nitrogen and phosphorus, but there are also hazardous substances such as heavy metals and anthropogenic organic substances. LÄS MER