| 44281. |
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| 44282. |
- Larsson, Ulf, et al.
(författare)
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Växtplanktonproduktion : mätningar med problem
- 2010
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Ingår i: Havet. - Stockholm : Naturvårdsverket och Havsmiljöinstitutet. - 9789162012816 ; , s. 26-29
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 44283. |
- Larsson, Viveca, 1974-
(författare)
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"A suffering heart". On the health of women living with violence in Vietnam.
- 2014
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The present study addresses abused Vietnamese women’s experience of health, as well as other health problems and family conflicts, while also taking into consideration professional dealings with family violence. Women’s health in everyday life is largely affected when they are exposed to violence by their male partners. Such violence exists in most societies around the world, also in the Vietnamese context, where the official policies focus on gender equality, together with a strong family concept. Thus, the present study aims to contribute to an empirical understanding of the relation between women’s health and violence against women within the family, from three perspectives: That of the society (organisations and professionals), the neighbourhood community (family members and neighbours), and the individuals (the abused women).The thesis is based on three qualitative interview studies. To reach the official Vietnamese society, national organisations working against violence were invited to participate and eleven professionals of different positions were interviewed. The semi-structured interviews were analysed with content analysis. To include the neighbourhood community perspectives on health and conflicts in family life, twenty-two men and women of different ages and backgrounds, but without any known history of abuse, participated in sixteen semi-structured interviews. For the third study twelve abused women presented life-stories through indepth interviews. The interviews of study two and three were analysed using narrative approach.On a professional level, the discussion on violence focus on the abusive men’s violent acts, on how to promote good social relations and how to make people in general recognise violence as a public health problem and value gender equality. In family everyday life, the informants consider women as the main responsible for the family well-being, but find cooperative support necessary in daily life. To adjust family life to social change, and to make everyone feel important, means to avoid boredom or distress are strategies used, since such conditions are considered to cause troubled relations, abuse and suffering. Violence within the family is seen as interpersonal problems where both partners are to blame for family dysfunction. Empathic sentiments, mutual support and communication are means to handle problems, and a harmonious and happy family is seen as protecting health.The abused women experience vulnerability, which they see as the foremost threat to their health. Injuries as well as worries cause harm. The abused women blame their husbands, for the violence, but they rarely confront them. Instead they use a number of strategies to handle their situation; through enduring, making their husband’s face others judgements, or divorce. They see violence as part of an everyday life of hardship, and consider that bearing too many troubles harms their health.A coherent approach between the different perspectives is needed if the abused women and their families will have a possibility to experience health. The professionals need to consider both public equality policies and the individuals’ experience of vulnerability. The abused women, and abusive men, would benefit from a neighbourhood community that is open to individual failure but still supportive and encouraging. To experience health this study found that it matters what position a person has, what expectations and judgement a person face, how well a person can manage her obligations, and what room for action she possesses.
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| 44284. |
- Larsson, Viktoria, et al.
(författare)
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Long-term postoperative opioid prescription after cholecystectomy or gastric by-pass surgery : a retrospective observational study
- 2021
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Ingår i: Scandinavian Journal of Pain. - : Walter de Gruyter. - 1877-8860 .- 1877-8879. ; 21:3, s. 569-576
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: Opioids are commonly prescribed post-surgery. We investigated the proportion of patients who were prescribed any opioids 6–12 months after two common surgeries – laparoscopic cholecystectomy and gastric by-pass (GBP) surgery. A secondary aim was to examine risk factors prior to surgery associated with the prescription of any opioids after surgery. Methods: We performed a retrospective observational study on data from medical records from patients who underwent cholecystectomy (n=297) or GBP (n=93) in 2018 in the Region of Västerbotten, Sweden. Data on prescriptions for opioids and other drugs were collected from the patients` medical records. Results: There were 109 patients (28%) who were prescribed opioids after discharge from surgery but only 20 patients (5%) who still received opioid prescriptions 6–12 months after surgery. All 20 of these patients had also been prescribed opioids within three months before surgery, most commonly for back and joint pain. Only 1 out of 56 patients who were prescribed opioids preoperatively due to gallbladder pain still received prescriptions for opioids 6–12 months after surgery. Although opioid use in the early postoperative period was more common among patients who underwent cholecystectomy, the patients who underwent GBP were more prone to be “long-term” users of opioids. In the patients who were prescribed opioids within three months prior to surgery, 8 out of 13 patients who underwent GBP and 12 of the 96 patients who underwent cholecystectomy were still prescribed opioids 6–12 months after surgery (OR 11.2; 95% CI 3.1–39.9, p=0,0002). Affective disorders were common among “long-term” users of opioids and prior benzodiazepine and amitriptyline use were significantly associated with “long-term” opioid use. Conclusions: The proportion of patients that used opioids 6–12 months after cholecystectomy or GBP was low. Patients with preoperative opioid-use experienced a significantly higher risk of “long-term” opioid use when undergoing GBP compared to cholecystectomy. The indication for being prescribed opioids in the “long-term” were mostly unrelated to surgery. No patient who was naïve to opioids prior surgery was prescribed opioids 6–12 months after surgery. Although opioids are commonly prescribed in the preoperative and in the early postoperative period to patients with gallbladder disease, there is a low risk that these prescriptions will lead to long-term opioid use. The reasons for being prescribed opioids in the long-term are often due to causes not related to surgery.
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| 44285. |
- Larsson, William, et al.
(författare)
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Coulometric Karl Fischer titration of trace water in diaphragm-free cells
- 2005
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Ingår i: Talanta. - : Elsevier BV. - 0039-9140 .- 1873-3573. ; 65:5, s. 1349-54
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Tidskriftsartikel (refereegranskat)abstract
- Factors influencing the accuracy and precision for diaphragm-free Karl Fischer coulometric determinations of low mu g-amounts of water have been studied using the Metrohm 756 (pulsed current) coulometer and eight different types of commercial coulometric reagents and some modifications of these. As in the case of diaphragm-free coulometric titration of large amounts of water, the positive errors, due to the formation of oxidizable reduction products (of sulfur dioxide) in the cathode reaction (besides hydrogen), were found to be minimized by the use of highest possible pulse current (in the range 100-400 mA) in combination with the fastest possible titration rate. Most accurate (102-103%) and precise results (typical relative standard deviation 1.8%) were obtained for reagents containing very large concentrations of imidazole in combination with the presence of modifiers like hexanol, chloroform and propylene glycol (i.e. the HYDRA-POINT reagents). Similar results were obtained when this type of reagent was mixed 60/40 with xylene according to the ASTM recommendation for water determinations in petroleum products like crude and lubricating oils. Addition of decanol to this type of reagent mixture was found to reduce the influence from the oxidative reduction products significantly. A reduction of the error from 3.6% relative to 1.6% was achieved by addition of 9% (v/v) of decanol to a 60/40 reagent mixture of HYDRA-POINT Coulometric Gen (containing hexanol as modifier) and xylene. For larger concentrations of decanol the pulse current had to be lowered to 100 mA and this might explain why no further improvement was observed. An additional attempt to minimize the interference by lowering the concentration of sulfur dioxide in the reagents gave no significant effect. However. by means of a home-built computer-controlled coulometric instrumentation based on continuous instead of pulsed current (including a large cathodic current density) it was possible to achieve recovery rates close to 100% for the best reagents investigated. The reason for this improvement is discussed.
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| 44286. |
- Larsson, William, et al.
(författare)
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Efficiency of methods for Karl Fischer determination of water in oils based on oven evaporation and azeotropic distillation
- 2003
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Ingår i: Analytical Chemistry. - : American Chemical Society (ACS). - 0003-2700 .- 1520-6882. ; 75:6, s. 1227-32
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Tidskriftsartikel (refereegranskat)abstract
- The efficiency of azeotropic distillation and oven evaporation techniques for trace determination of water in oils has recently been questioned by the National Institute of Standards and Technology (NIST), on the basis of measurements of the residual water found after the extraction step. The results were obtained by volumetric Karl Fischer (KF) titration in a medium containing a large excess of chloroform (> or = 65%), a proposed prerequisite to ensure complete release of water from the oil matrix. In this work, the extent of this residual water was studied by means of a direct zero-current potentiometric technique using a KF medium containing more than 80% chloroform, which is well above the concentration recommended by NIST. A procedure is described that makes it possible to correct the results for dilution errors as well as for chemical interference effects caused by the oil matrix. The corrected values were found to be in the range of 0.6-1.5 ppm, which should be compared with the 12-34 ppm (uncorrected values) reported by NIST for the same oils. From this, it is concluded that the volumetric KF method used by NIST gives results that are much too high.
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| 44287. |
- Larsson, William, et al.
(författare)
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Interference-free coulometric titration of water in lithium bis(oxalato)borate using Karl Fischer reagents based on N-methylformamide
- 2006
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Ingår i: Talanta. - : Elsevier BV. - 0039-9140 .- 1873-3573. ; 69:1, s. 276-280
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Tidskriftsartikel (refereegranskat)abstract
- A non-alcoholic coulometric reagent based on N-methylformamide (NMF) was shown to eliminate the severe interference effect caused by the alcohol component of the conventional Karl Fischer (KF) reagent on the battery electrolyte lithium bis(oxalato)borate (LiBOB). For sample amounts up to 240 μg of water, the stoichiometry of the KF reaction deviated only slightly from the ideal 1:1 ratio for the best reagent composition. Both solid and dissolved (in acetonitrile, tetrahydrofuran (THF), and ethylene carbonate/ethyl methyl carbonate) LiBOB were titrated successfully using a Metrohm 756 KF Coulometer with a diaphragm cell. The detection limit was estimated to be 0.5–1 μg of water using 100 ml of reagent in this system.
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| 44288. |
- Larsson, William, et al.
(författare)
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Investigation of Amine-Buffered Amide Reagents for Coulometric Karl Fischer Titration
- 2009
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Ingår i: Talanta. - : Elsevier BV. - 0039-9140 .- 1873-3573. ; 78:4-5, s. 1452-1457
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Tidskriftsartikel (refereegranskat)abstract
- Formamide (FA), N-methylformamide (NMF), and dimethylformamide (DMF),were evaluated as solvents for coulometric Karl Fischer (KF) reagents in combination with several amine bases. Except for the effect of the iodine species (iodine or triiodide), the pH of the reagent and the position of the sulfur dioxide/ hydrogen sulfite equilibrium were found to be the main factors explaining the large difference in the observed reaction rates betweenwater and the KF reagent in these solvents. Acid–base titrations showed that hydrogen sulfite is the main sulfur reactant in these media. The results will be of great importance in finding suitable combinations of base and solvent with respect to stoichiometry, side reactions caused by active carbonyl compounds, and reagent stability.
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| 44289. |
- Larsson, William, 1975-
(författare)
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New approaches to moisture determination in complex matrices based on the Karl Fischer Reaction in methanolic and non-alcoholic media
- 2008
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Vattenhaltsbestämning är av stor vikt i många sammanhang. T.ex. kan vattenhalten påverka utbytet av en kemisk syntes, eller ha negativ inverkan på hållbarheten av läkemedel och livsmedel. Standardmetoden för vattenhaltsbestämning är Karl Fischer-titrering, baserad på antingen volymetri eller coulometri. I den här avhandlingen presenteras nya infallsvinklar för bestämning av mycket låga halter vatten i komplexa provmatriser, som t.ex. tekniska oljor och substanser som interfererar med alkoholbaserade Karl Fischer-reagens. Vattnet avskiljs ofta från oljematrisen före titrering genom förångning. I samband med framtagningen av nya referensmaterial för vatten i olja ifrågasattes förångningsteknikernas effektivitet av National Institute of Standards and Technology (NIST). NIST menade att en fraktion av vattnet bands hårt i oljefasen och att det inte kunde frigöras och detekteras annat än med en modifierad volymetrisk metod där reagenset innehöll minst 65% kloroform. I den här avhandlingen presenteras en alternativ metod som uppfyller det ställda kravet för en fullständig upplösning av oljefasen. Med denna metod visas att det inte finns någon anledning att ifrågasätta förångningsteknikernas effektivitet och att den modifierade metoden som NIST använder ger systematiskt för höga resultat. Fördelar som enklare handhavande, kortare konditioneringstider och att endast ett reagens behövs har gjort att diafragmafri coulometri har blivit allt mer populär. Spårhaltsbestämning med denna teknik ställer dock speciellt höga krav på reagensen eftersom strömtätheten vid katoden är låg. Med anledning av detta testades olika typer av kommersiella reagensblandningar för bestämning av små vattenmängder och kritiska parametrar identifierades. Dekanol visade sig ha en gynnsam effekt på katodreaktionen i reagens modifierade med xylen enligt standardmetodbeskrivningen för bestämning av vatten i oljor. För provtyper som inte går att analysera med alkoholbaserade reagenser presenteras en ny typ baserad på N-metylformamid. Med ett sådant reagens bestämdes vattenhalten i ett reaktivt salt som används i litiumjonbatterier. Liknande alkoholfria reagens undersöktes mer utförligt i en djupare studie som även inkluderade formamid och dimetylformamid. För- och nackdelar med dessa alternativa lösningsmedel diskuteras och möjliga reaktionsförlopp föreslås. Det visade sig att läget på jämvikten mellan svaveldioxid och vätesulfit är en avgörande faktor för att förklara den stora skillnaden i reaktionshastighet i dessa lösningsmedel.
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| 44290. |
- Larue, Thomas, 1973-
(författare)
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Agents in Brussels: Delegation and democracy in the European Union
- 2006
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This dissertation explores delegation and democracy within the European Union (EU). The EU now constitutes one of the cornerstones of the democratic systems of its member states. The most vital instrument of democracy is lawmaking, which increasingly occurs at the European level. Many different actors contribute to the shaping of EU legislation. Among the most important of these are national bureaucrats representing their member states in Council negotiations. This thesis focuses on these bureaucrats. In particular it analyzes the delegation and accountability relationship between member states’ governments and their national bureaucrats stationed at the permanent representations (PRs) in Brussels. It is based on semi-structured elite interviews with 80 French and Swedish senior civil servants in Brussels, Paris and Stockholm.Using an explorative and descriptive comparative case study of two EU member states, France and Sweden, the dissertation seeks to describe and analyse how delegation between member states’ capitals and Brussels are affected by: i) the coordination and preparation of EU issues in member states’ government offices, ii) the organisation and functioning of the permanent representations, and, most importantly, iii) existing accountability mechanisms. Applying a principal-agent approach, this study shows that the delegation between governments and their Brussels-based bureaucrats is adequate, despite relatively weak delegation and accountability designs. The study identifies institutional divergence between France and Sweden as regards the design of national systems of EU delegation, particularly monitoring and reporting requirements, where Sweden seems to have a more developed system. Both countries have similar contract design and screening and selection systems for employing national agents stationed at the PRs. The impact of domestic coordination of EU affairs is important in order to understand processes of both preference formation precedent to delegation and of preference transfer through instructions. In this case it is obvious that French coordination is more efficient. The functions of the permanent representation also influence delegation between national and European levels. For example, administrative procedures in the PRs in Brussels have had effects on the drafting of instructions, something that is particularly notable in the Swedish case.The study identifies several central problems as regards delegation between bureaucrats in Brussels and governments in member states’ capitals. The first problem has to do with the ongoing blurring of political and bureaucratic dimensions. This inhibits the ability of principals (in our case member state governments) to hold their agents (Brussels-based bureaucrats) accountable. The second problem identified by this study as regards the working of democracy is the distinction between formal and informal processes. One conclusion is that informal processes should be formalised or made more transparent. Opacity in lawmaking processes has detrimental effects on long-term legitimacy of democratic systems. Holding de facto lawmaking bureaucrats, caught in a cross-pressure between national demands and European ambitions, accountable is essential for democracy. The dissertation includes practical suggestions as to how to improve delegation, and argues that additional research on both the roles and power of bureaucrats as well as issues of cross-pressure is necessary.
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