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- Eriksson, Peder, et al.
(författare)
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Temporal changes and spatial variation of soil oxygen consumption, nitrification and denitrification rates in a tidal salt marsh of the Lagoon of Venice, Italy
- 2003
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Ingår i: Estuarine, Coastal and Shelf Science. - : Elsevier. - 0272-7714 .- 1096-0015. ; 58:4, s. 861-871
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was to investigate seasonal and spatial patterns of soil oxygen consumption, nitrification, denitrification and fluxes of dissolved inorganic nitrogen (DIN) in a tidal salt marsh of the Lagoon of Venice, Italy. In the salt marsh, intact soil cores including overlying water were collected monthly at high tide from April to October in salt marsh creeks and in areas covered by the dominant vegetation, Limonium serotinum. In May, cores were also collected in areas with vegetation dominated by Juncus maritimus and Halimione portulacoides. In laboratory incubations at in situ temperature in the dark, flux rates of oxygen and DIN were monitored in the overlying water of the intact cores. 15N-nitrate was added to the overlying water and nitrification and denitrification were measured using isotope-dilution and -pairing techniques. The results show that highest soil oxygen consumption coincided with the highest water temperature in June and July. The highest denitrification rates were recorded in spring and autumn coinciding with the highest nitrate concentrations. Soil oxygen consumption and nitrification rates differed between sampling sites, but denitrification rates were similar among the different vegetation types. The highest rates were recorded in areas covered with L. serotinum. Burrowing soil macrofauna enhanced oxygen consumption, nitrification and denitrification in April and May. The data presented in this study indicate high temporal as well as spatial variations in the flux of oxygen and DIN, and nitrogen transformations in the tidal salt marshes of the Venice lagoon during the growth season. The results identify the salt marshes of the Venice lagoon as being metabolically very active ecosystems with a high capacity to process nitrogen.
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| 2. |
- Ahlborg, Mikael, 1985-
(författare)
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Social capital and inequalities in mental health among young adolescents in Sweden
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The aim of this thesis was to explore social capital and inequalities in mental health among young adolescents in Sweden. This is a compilation thesis comprising four studies. Studies I and II are quantitative studies of crosssectional data from the Swedish Health Behaviour in School-aged Children survey. The aim of Study I was to investigate socioeconomic inequalities in health using both a subjective and an objective measure of socioeconomic status among Swedish adolescents. The findings showed that subjective socioeconomic status robustly and independently predicted mental health problems, poor life satisfaction and poor general health perception. The association between objective socioeconomic status and mental health was weakened, and even reversed, when subjective socioeconomic status was accounted for in regression models. A Latent Profile Analysis was applied in Study II with the aim of identifying distinct profiles of family, school and peer social capital in a nationally representative sample of adolescents and to explore health outcomes in those profiles. The findings showed that five distinct profiles best represented the data for 11 and 15-year olds, while a four-profile model was optimal for 13-year olds. Significant inequalities were identified between profiles when these were examined in terms of mental health problems and life satisfaction. The design of Study III was a qualitative semi-structured interview study. The aim was to explore social capital from the perspective of adolescents in relation to mental health. Adolescents spoke of having access to a safe space, feeling connected to others and predictability as important aspects of social relationships and networks in relation to mental health. The aim of Study IV was to identify and evaluate the design and psychometric properties of instruments for assessing social capital specifically developed and validated for self-reporting among adolescents (10-19 years). The design was a systematic review, in which 20 instruments were identified. The results revealed a lack of instruments that covered both the multidimensionality of social capital and contextual relevance in relation to adolescents. The conclusion from this thesis is that social capital may be useful for identifying vulnerable individuals and for differentiating between the natural imbalance of adolescence and what may lead to serious illness. Longitudinal research and refinement of the operationalization of the concept are, however, needed to enhance the understanding of these findings.
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| 4. |
- Sjöberg, Carina, 1964-, et al.
(författare)
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Creating a shielding place for children with leukaemia during sedation for intrathecal chemotherapy : A grounded theory study
- 2020
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Ingår i: European Journal of Oncology Nursing. - Oxford : Elsevier. - 1462-3889 .- 1532-2122. ; 44
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: Childhood cancer invades the child's daily life and has a strong influence on their living conditions and lifestyle. The treatment is an unpleasant experience and the children often perceive the treatment as worse than the actual disease. The aim of the present study was thus to explore the process of how healthcare professionals improved care for children undergoing sedation for intrathecal chemotherapy.Method: A constructivist grounded theory approach was applied and qualitative interviews with paediatricians (n = 2), anaesthetists (n = 2), paediatric nurses (n = 3) and nurse anaesthetists (n = 5).Results: The theory of creating a shielding place emerged and conceptualized the pattern of behavior of healthcare professionals throughout the procedure of sedation for intrathecal chemotherapy for pediatric leukaemia. The theory explains the core category ‘shielding’ and the process of how healthcare professionals developed strategies to resolve their main concern: a striving to reduce discomfort and suffering induced by the procedure and the treatment. These strategies, used throughout the procedure, were; de-dramatizing, de-exposing and minimizing trespassing.Conclusions: The theory of creating a shielding place offers a greater understanding of how healthcare professionals included the child's perspective in their work and thereby enabled a more sensitive and supportive care that had an impact on both quality of care and patient safety. The results from the study contributes with theoretical knowledge that can be used for developing evidence-based care guidelines for the procedure of sedating a child with leukaemia for intrathecal chemotherapy. © 2019 Published by Elsevier Ltd.
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| 7. |
- Tonderski, Karin S., et al.
(författare)
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Våtmarker : Närsaltsfällor och/eller myllrande mångfald?
- 2003
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Ingår i: Vatten: tidskrift för vattenvård. - Nykvarn : Föreningen Vatten. - 0042-2886. ; 59:4, s. 259-270
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Tidskriftsartikel (refereegranskat)abstract
- This paper summarizes the state-of-the-art with respect to wetlands for nutrient removal and biodiversity enhancement, as expressed at a research workshop in December 2002. In the end of 2002, 260 and 884 wetlands had been constructed in Sweden with subsidies from LIP and the European Union, respectively. Most frequently, the aims were to remove nutrients from water and enhance biodiversity. The question raised is if we know how to design multifunctional wetlands. Should a wetland be deep or shallow, with or without macrophytes to be an efficient nutrient sink? Diverging opinions are presented, but generally it appears that fairly shallow wetlands at least partly covered by emergent macrophytes are favourable. The importance of extreme high flows and hydraulic short-circuiting is highlighted, and Danish and Norwegian approaches to wetlands construction are presented. Also, there is a risk that nutrient retaining wetlands develop a fairly trivial flora and fauna unless special care is taken. Intentional establishment of desirable and less common species, as well as creation of a variation of depth gradients to favour such species are such measures. Others are allowing for water level variations, as well as vegetation management such as grazing and harvesting.
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| 8. |
- Ursby, Thomas, et al.
(författare)
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BioMAX the first macromolecular crystallography beamline at MAX IV Laboratory
- 2020
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Ingår i: Journal of Synchrotron Radiation. - Chichester : Wiley-Blackwell. - 0909-0495 .- 1600-5775. ; 27, s. 1415-1429
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Tidskriftsartikel (refereegranskat)abstract
- BioMAX is the first macromolecular crystallography beamline at the MAX IV Laboratory 3 GeV storage ring, which is the first operational multi-bend achromat storage ring. Due to the low-emittance storage ring, BioMAX has a parallel, high-intensity X-ray beam, even when focused down to 20 μm × 5 μm using the bendable focusing mirrors. The beam is tunable in the energy range 5-25 keV using the in-vacuum undulator and the horizontally deflecting double-crystal monochromator. BioMAX is equipped with an MD3 diffractometer, an ISARA high-capacity sample changer and an EIGER 16M hybrid pixel detector. Data collection at BioMAX is controlled using the newly developed MXCuBE3 graphical user interface, and sample tracking is handled by ISPyB. The computing infrastructure includes data storage and processing both at MAX IV and the Lund University supercomputing center LUNARC. With state-of-the-art instrumentation, a high degree of automation, a user-friendly control system interface and remote operation, BioMAX provides an excellent facility for most macromolecular crystallography experiments. Serial crystallography using either a high-viscosity extruder injector or the MD3 as a fixed-target scanner is already implemented. The serial crystallography activities at MAX IV Laboratory will be further developed at the microfocus beamline MicroMAX, when it comes into operation in 2022. MicroMAX will have a 1 μm × 1 μm beam focus and a flux up to 1015 photons s with main applications in serial crystallography, room-temperature structure determinations and time-resolved experiments.
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| 9. |
- Wilhsson, Marie, 1969-
(författare)
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Ungdomars strävan mot att lyckas och nå framgång i livet – skolan som hälsofrämjande arena
- 2016
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Syfte: Avhandlingens övergripande syfte var att öka kunskapen om perspektiv på ungdomars hälsa som utgångspunkt för att utveckla hälsofrämjande insatser i skolan.Metod: Studie I hade en kvantitativ beskrivande tvärsnittsdesign. Datamaterialet inhämtades från 948 ungdomar (11-15 år) som analyserades med multivariat logistik regressionsanalys. Studie II hade en kvalitativ utforskande design. Datamaterialet inhämtades från 117 ungdomar (14-17 år) och analyserades med grundad teori. Studie III hade en kvalitativ beskrivande design. Datamatmaterialet inhämtades från 42 ungdomar (14-15 år) och analyserades med kvalitativ innehållsanalys. Studie IV hade en kvalitativ beskrivande design. Datamaterialet inhämtades från 27 intressenter och analyserades med kvalitativ innehållsanalys.Resultat: Ungdomarna strävar mot att lyckas och att bli framgångsrika i nuet och i framtiden. En strävan som för ungdomarna upplevs som en kamp om sin tid, en kamp som de hanterar genom att använda sig av olika strategier för att balansera skolarbete och fritid. Flickors strävan handlar om att nå framgång i skolan för att bli självständig i framtiden. För pojkarna innebär framgång att bli framgångsrika inom någon av sina fritidsaktiviteter så som sport, som visar deras fysiska styrka. Framgång i nuet är av betydelse för pojkarna till skillnad från flickorna som ser på sin framgång i ett längre perspektiv. Det hälsofrämjande arbetet bör inrikta sig på att stödja ungdomars känsla av sammanhang och stärka optimism redan tidigt i tonåren samt synliggöra organisatoriska och kontextuella strukturer och normer som påverkar flickors och pojkars hälsa och livsstil.Konklusion:Sammanfattningsvis visar avhandlingen att perspektiv på ungdomars hälsa bör förstås på olika nivåer i samhället och också inkluderar perspektiv på kön. Vidare bör faktorer som är av betydelse för ungdomars livsstil diskuteras utifrån ett salutogent perspektiv och det hälsofrämjande arbetet i skolan bör utveckla insatser med kontextuella och könsspecifika utgångspunkter för att främja flickors och pojkars hälsa och livsstil.
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