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- Andersson, Linus, et al.
(author)
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The influence of health-risk perception and distress on reactions to low-level chemical exposure
- 2013
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In: Frontiers in Psychology. - : Frontiers Media SA. - 1664-1078. ; 4, s. 816-
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Journal article (peer-reviewed)abstract
- The general aim of the current study was to investigate how perceived health risk of a chemical exposure and self-reported distress are related to perceived odor intensity and odor valence, symptoms, cognitive performance over time as well as reactions to blank exposure. Based on ratings of general distress, 20 participants constituted a relatively low distress group, and 20 other participants a relatively high distress group. Health risk perception was manipulated by providing positively and negatively biased information regarding n-butanol. Participants made repeated ratings of intensity, valence and symptoms and performed cognitive tasks while exposed to 4.7 ppm n-butanol for 60 min (first 10 min were blank exposure) inside an exposure chamber. Ratings by the positive and negative bias groups suggest that the manipulation influenced perceived health risk of the exposure. The high distress group did not habituate to the exposure in terms of intensity when receiving negative information, but did so when receiving positive information. The high distress group, compared with the low distress group, rated the exposure as significantly more unpleasant, reported greater symptoms and performed worse on a cognitively demanding task over time. The positive bias group and high distress group rated blank exposure as more intense. The main findings suggest that relatively distressed individuals are negatively affected by exposures to a greater degree than non-distressed.
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| 5. |
- Bellander, Theres, 1977-
(author)
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Ungdomars dagliga interaktion : En språkvetenskaplig studie av sex gymnasieungdomars bruk av tal, skrift och interaktionsmedier
- 2010
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Doctoral thesis (other academic/artistic)abstract
- This thesis explores young people's interaction with different individuals through a variety of media. Three girls and three boys aged 16–18, from an urban school, a rural school and a suburban school, were each observed for a week, at school, at home and during leisure activities. The data analysed consist of field notes, video and audio recordings, and texts written by the participants. The aim of the study is to investigate how young people’s use of language varies in relation to different contexts. Questions are asked about what activities they participate in, what media they use and how they use them, and how they express themselves orally and in writing in different contexts and through different media. The study is based in sociolinguistic theory and activity type theory. Data were collected using ethnographical methods, and analytical tools were drawn from a broadly defined field of discourse analysis. The investigation sheds light on the relationship between what young people are doing socially in any given situation and how they interact. Variation in linguistic styles is made visible by a study of the same individuals involved in different communicative activities. Young people are shown to be a heterogeneous group who engage in different sets of activities. The study questions prevailing definitions and categorisations of adolescents’ linguistic styles and use of electronic media. The outcome is a complex description of everyday interaction, which is found to be shaped by the frames for communicative activities, the technical characteristics of the media employed, and individual factors. In conversational turns, Internet chat messages and text messages, young people select resources from their individual linguistic repertoires in order to achieve specific goals or construct particular roles through their interaction.
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| 6. |
- Dahlman, Joakim, 1974-, et al.
(author)
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Effects of Motion Sickness on Encoding and Retrieval
- 2010
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Journal article (peer-reviewed)abstract
- Objective: In this study, possible effects of motion sickness on encoding and retrieval of words were investigated. Background: The impact of motion sickness on human performance has been studied with regards to psychomotor functions and over learned skills, as well as to novel situations requiring encoding and retrieval skills through the use of short term memory. In this study, possible effects of motion sickness on encoding and retrieval of words were investigated. Method: Forty healthy participants, half of them males, performed a continuous recognition task (CRT) during exposure to a motion sickness triggering optokinetic drum. The CRT was employed as a measurement of performance and consisted of encoding and retrieval of words. The task consisted of three consecutive phases 1) encoding of familiar words; 2) encoding and retrieval of words under the influence of motion sickness; 3) retrieval of words after exposure. Results: Data analysis revealed no significant differences in the ability to encode or retrieve words during motion sickness compared with a control condition. In addition, there were no significant correlations between the level of motion sickness and performance of the CRT. Conclusion: The results indicate that encoding and retrieval of words are not affected by moderate levels of motion sickness. Application: This research has implications for operational settings where professionals experience moderate levels of motion sickness.
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| 7. |
- Donner, Erica, et al.
(author)
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Presence and fate of priority substances in domestic greywater treatment and reuse systems
- 2010
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In: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 408:12, s. 2444-2451
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Journal article (peer-reviewed)abstract
- A wide range of household sources may potentially contribute to contaminant loads in domestic greywater. The ability of greywater treatment systems to act as emission control barriers for household micropollutants, thereby providing environmental benefits in addition to potable water savings, have not been fully explored. This paper investigates the sources, presence and potential fate of a selection of xenobiotic micropollutants in on-site greywater treatment systems. All of the investigated compounds are listed under the European Water Framework Directive as either "Priority Substances" (PS) or "Priority Hazardous Substances" (PHS). Significant knowledge gaps are identified. A wide range of potential treatment trains are available for greywater treatment and reuse but treatment efficiency data for priority substances and other micropollutants is very limited. Geochemical modelling indicates that PS/PHS removal during treatment is likely to be predominantly due to sludge/solid phase adsorption, with only minor contributions to the water phase. Many PS/PHS are resistant to biodegradation and as the majority of automated greywater treatment plants periodically discharge sludge to the municipal sewerage system, greywater treatment is unlikely to act as a comprehensive PS/PHS emission barrier. Hence, it is important to ensure that other source control options (e.g. eco-labeling, substance substitution, and regulatory controls) for household items continue to be pursued, in order that PS/PHS emissions from these sources are effectively reduced and/or phased out as required under the demands of the European Water Framework Directive.
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| 8. |
- Eriksson, Eva, 1973-, et al.
(author)
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Presence of selected priority and personal care substances in an onsite bathroom greywater treatment facility
- 2010
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In: Water Science and Technology. - : IWA Publishing. - 0273-1223 .- 1996-9732. ; 62:12, s. 2889-2898
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Journal article (peer-reviewed)abstract
- In recent years, concerns about climate change and the inefficient use and ongoing pollution of water resources have increased the political motivation to encourage water recycling. This has led to the widespread introduction of water saving measures and to advances in the decentralised treatment and reuse of wastewater. In particular, the treatment and reuse of greywater has received attention, although important information such as greywater substance loadings is still only rarely available. With the implementation of the European Water Framework Directive the focus on controlling and phasing-out Priority/Priority Hazardous Substances (PS/PHS) is growing, and it is vital to know their sources and flows in order to generate sustainable emission control strategies. The main objective of this study was to quantify the concentrations and loads of PS/PHS and personal care substances in bathroom greywater, and to thereby assess the contribution of household activities to municipal wastewater loads for these substances. Nickel and mercury may be sourced substantially from household activities as it shown in the paper that bathroom greywater contributed a significant proportion of the overall load of these substances at the municipal wastewater treatment plant. Organic matter in the influent greywater was found to be principally associated with large particles (>8 µm), however it was the dissolved and small sized particles that were predominantly removed in the treatment.
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| 9. |
- Eriksson, Eva, 1973-, et al.
(author)
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Water management in cities of the future using emission control strategies for priority hazardous substances
- 2011
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In: Water Science and Technology. - : IWA Publishing. - 0273-1223 .- 1996-9732. ; 64:10, s. 2109-2118
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Journal article (peer-reviewed)abstract
- Cities of the future face challenges with respect to the quantity and quality of water resources, and multiple managerial options need to be considered in order to safeguard urban surface water quality. In a recently completed project on “Source Control Options for Reducing Emissions of Priority Pollutants” (ScorePP), seven emission control strategies (ECS) have been developed and tested on a semi-hypothetical case city (SHCCA) for selected European priority pollutants (PPs). The SHCCA approach was chosen to facilitate transparency, to mitigate data gaps and to decrease the level of uncertainty in the results. The selected PPs differ in their uses and environmental fate and therefore accumulate in different urban environmental compartment. To achieve the required reduction in PP levels in urban waters the full implementation of existing EU regulation is essential and appropriate combinations of managerial and technological options (source control and treatment) can be highly relevant.
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| 10. |
- Falås, Per, et al.
(author)
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Occurrence and reduction of pharmaceuticals in the water phase at Swedish wastewater treatment plants.
- 2012
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In: Water Science and Technology. - : IWA Publishing. - 0273-1223 .- 1996-9732. ; 66:4, s. 783-791
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Journal article (peer-reviewed)abstract
- During the last decade, several screening programs for pharmaceuticals at Swedish wastewater treatment plants (WWTPs) have been conducted by research institutes, county councils, and wastewater treatment companies. In this study, influent and effluent concentrations compiled from these screening programs were used to assess the occurrence and reduction of non-antibiotic pharmaceuticals for human usage. The study is limited to full-scale WWTPs with biological treatment. Based on the data compiled, a total of 70 non-antibiotic pharmaceuticals have been detected, at concentrations ranging from a few ng/L to several μg/L, in the influent water. The influent concentrations were compared with the sale volumes and for many pharmaceuticals it was shown that only a small fraction of the amount sold reaches WWTPs as dissolved parent compounds. Pharmaceuticals with low reduction degrees at traditional WWTPs were identified. Further comparison based on the biological treatment showed lower reduction degrees for several pharmaceuticals in trickling filter plants compared with activated sludge plants with nitrogen removal.
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