| 1. |
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| 2. |
- Enhörning, Sofia, et al.
(författare)
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Water Supplementation Reduces Copeptin and Plasma Glucose in Adults With High Copeptin : The H2O Metabolism Pilot Study
- 2019
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Ingår i: The Journal of clinical endocrinology and metabolism. - : The Endocrine Society. - 1945-7197 .- 0021-972X. ; 104:6, s. 1917-1925
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: Because elevated copeptin, a marker of vasopressin, is linked to low water intake and high diabetes risk, we tested the effect of water supplementation on copeptin and fasting glucose.DESIGN, SETTING, AND PARTICIPANTS: Thirty-one healthy adults with high copeptin (>10.7 pmol · L-1 in men and >6.1 pmol·L-1 in women) identified in a population-based survey from 2013 to 2015 and with a current 24-hour urine osmolality of >600 mOsm · kg-1 were included.INTERVENTION: Addition of 1.5 L water daily on top of habitual fluid intake for 6 weeks.MAIN OUTCOME MEASURE: Pre- and postintervention fasting plasma copeptin concentrations.RESULTS: Reported mean water intake increased from 0.43 to 1.35 L · d-1 (P < 0.001), with no other observed changes in diet. Median (interquartile range) urine osmolality was reduced from 879 (705, 996) to 384 (319, 502) mOsm · kg-1 (P < 0.001); urine volume increased from 1.06 (0.90, 1.20) to 2.27 (1.52, 2.67) L · d-1 (P < 0.001); and baseline copeptin decreased from 12.9 (7.4, 21.9) pmol · L-1 to 7.8 (4.6;11.3) pmol · L-1 (P < 0.001). Water supplementation reduced fasting plasma glucose from a mean (SD) of 5.94 (0.44) to 5.74 (0.51) (P = 0.04). The water-associated reduction of both fasting copeptin and glucose concentration in plasma was most pronounced in participants in the top tertile of baseline copeptin.CONCLUSIONS: Water supplementation in persons with habitually low water consumption and high copeptin levels is effective in lowering copeptin. It appears a safe and promising intervention with the potential of lowering fasting plasma glucose and thus reducing diabetes risk. Further investigations are warranted to support these findings.
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| 3. |
- Jonsson, Sofia, 1973-, et al.
(författare)
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Comparison of Fenton's Reagent and Ozone Oxidation of Polycyclic Aromatic Hydrocarbons in Aged Contaminated Soils
- 2006
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Ingår i: Journal of Soils and Sediments. - Berlin : Springer. - 1614-7480 .- 1439-0108. ; 6:4, s. 208-214
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Tidskriftsartikel (refereegranskat)abstract
- Background, Aim and Scope: Polycyclic aromatic hydrocarbons (PAHs) are formed as a result of incomplete combustion and are among the most frequently occurring contaminants in soils and sediments. PAHs are of great environmental concern due to their ubiquitous nature and toxicological properties. Consequently, extensive research has been conducted into the development of methods to remediate soils contaminated with PAHs. Fenton's reagent or ozone is the most commonly studied chemical oxidation methods. However, the majority of remediation studies use soils that have been artificially contaminated with either one or a limited number of PAH compounds in the laboratory. Hence, it is essential to extend such studies to soils contaminated with multiple PAHs under field conditions. Objectives. The objective of this study is to investigate the capacity of Fenton's reagent and ozone to degrade PAHs in soils. The soils have been collected from a number of different industrial sites and, therefore, will have been exposed to different PAH compounds in varying concentrations over a range of time periods. The capacity of Fenton's reagent and ozone to degrade PAHs in industrially contaminated soils is compared to results obtained in studies using soils artificially contaminated with PAHs in the laboratory. Materials and Methods: Nine soil samples, contaminated with PAHs, were collected from five different industrial sites in Sweden. For the Fenton's reagent procedure, the pH of the soil slurry samples was adjusted to pH 3 and they were kept at a constant temperature of 70ºC whilst H2O2 was added. For the ozone procedure, soil samples were mixed with 50% water and 50% ethanol and kept at a constant temperature of 45 ºC. Ozone was then continually introduced to each soil sample over a period of four hours. Following the Fenton's reagent and ozone oxidation procedures, the samples were filtered to isolate the solid phase, which was then extracted using pressurized liquid extraction (PLE). The sample extracts were cleaned up using open columns and then analysed by gas chromatography-mass spectrometry (GC-MS). Results: The relative abundance of the detected PAHs varied between soils, associated with different industries. For example, low molecular weight (LMW) PAHs were more abundant in soil samples collected from wood impregnation sites and high overall PAH degradation efficiencies were observed in soils originating from these sites. In the contaminated soils studied, PAHs were more effectively degraded using Fenton's reagent (PAH degradation efficiency of 40-86%) as opposed to ozone (PAH degradation efficiency of 10-70%). LMW PAHs were more efficiently degraded, using ozone as the oxidizing agent, whereas the use of Fenton's reagent resulted in a more even degradation pattern for PAHs with two through six fused aromatic rings. Discussion: The degradation efficiency for both methods was largely dependent on the initial PAH concentration in the soil sample, with higher degradation observed in highly polluted soils. LMW PAHs are more susceptible to degradation than high molecular weight (HMW) PAHs. As a result of this the relative abundance of large (often carcinogenic) PAHs increased after chemical oxidation treatment, particularly after ozone treatment. Repeated Fenton's reagent treatment did not result in any further degradation of soil PAHs, indicating that residual soil PAHs are strongly sorbed. The effectiveness of the two oxidation treatment approaches differed between industrial sites, thus highlighting the importance of further research into the influence of soil properties on the sorption capacity of PAHs. Conclusions: This study demonstrates that the degree to which chemical oxidation techniques can degrade soil bound PAHs chemical degradation is highly dependent on both the concentration of PAHs in the soils and the compounds present, i.e. the various PAH profiles. Therefore, similarities in the PAH degradation efficiencies in the nine soil samples studied were observed with the two chemical oxidation methods used. However, the degradation performance of Fenton's reagent and ozone differed between the two methods. Overall, Fenton's reagent achieved the highest total PAH degradation due to stronger oxidation conditions. LMW PAHs showed higher susceptibility to oxidation, whereas high molecular weight (HMW) PAHs appear to be strongly sorbed to the soils and therefore less chemically available for oxidation. This study highlights the importance of including soils collected from a range of contaminated sites in remediation studies. Such soil samples will contain PAH contaminants of varying concentrations, chemical and physical properties, and have been aged under field conditions. In addition to the chemical and physical properties of the soils, these factors will all influence the chemical availability of PAHs to oxidation. Recommendations and Perspectives: We recommend including aged contaminated soils in chemical degradation studies. In future chemical remediation work, we intend to investigate the potential influence of the chemical and physical properties of PAHs and soil parameters potential influence on the chemical oxidation efficiency in aged contaminated soils. Due to the vast number of contaminated sites there is a great need of efficient remediation methods throughout the world. This study shows the difficulties which may be experienced when applying remediation methods to a variation of contaminated sites.
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| 4. |
- Jonsson, Sofia, 1973-, et al.
(författare)
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Degradation of polycyclic aromatic hydrocarbons (PAHs) in contaminated soils by Fenton's reagent : a multivariate evaluation of the importance of soil characteristics and PAH properties
- 2007
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Ingår i: Journal of Hazardous Materials. - : Elsevier BV. - 0304-3894 .- 1873-3336. ; 149:1, s. 86-96
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Tidskriftsartikel (refereegranskat)abstract
- In this study, we investigated how the chemical degradability of polycyclic aromatic hydrocarbons (PAHs) in aged soil samples from various contaminated sites is influenced by soil characteristics and by PAH physico-chemical properties. The results were evaluated using the multivariate statistical tool, partial least squares projections to latent structures (PLS). The PAH-contaminated soil samples were characterised (by pH, conductivity, organic matter content, oxide content, particle size, specific surface area, and the time elapsed since the contamination events, i.e. age), and subjected to relatively mild, slurry-phase Fenton's reaction conditions. In general, low molecular weight PAHs were degraded to a greater extent than large, highly hydrophobic variants. Anthracene, benzo(a)pyrene, and pyrene were more susceptible to degradation than other, structurally similar, PAHs; an effect attributed to the known susceptibility of these compounds to reactions with hydroxyl radicals. The presence of organic matter and the specific surface area of the soil were clearly negatively correlated with the degradation of bi- and tri-cyclic PAHs, whereas the amount of degraded organic matter correlated positively with the degradation of PAHs with five or six fused rings. This was explained by enhanced availability of the larger PAHs, which were released from the organic matter as it degraded. Our study shows that sorption of PAHs is influenced by a combination of soil characteristics and physico-chemical properties of individual PAHs. Multivariate statistical tools have great potential for assessing the relative importance of these parameters.
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| 5. |
- Malm, Joakim, et al.
(författare)
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UTVÄRDERING AV SI-VERKSAMHETEN VID LUNDS UNIVERSITET 2016/17
- 2017
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Samverkansinlärning/Supplemental Instruction (SI) är en pedagogisk metod som syftar till att öka genomströmningen i svåra kurser. Metoden uppstod i USA vid University of Missouri Kansas City i mitten på 1970-talet och har därefter spridits till mer än 1500 högre lärosäten i ett trettiotal länder (Martin, 2008). Kort kan SI sägas vara ett studentdrivet komplement till ordinarie undervisning vid högre utbildning. Material i en kurs bearbetas tillsammans i en studiegrupp genom diskussion och grupparbeten under ledning av en äldre student – den s.k. SI-ledaren. Samverkansinlärning kom till Lunds universitet 1994 och har fått stor spridning på universitetet. Lund universitet utgör också ett nav för SI både i Sverige (SI finns på ca 15 svenska högre lärosäten) och i Europa och är också platsen för det nordeuropeiska SI-centret som ansvarar för utbildning och uppföljning i området på uppdrag av det internationella SI-centret i USA. Denna rapport sammanfattar resultaten från en utvärdering av SI-verksamheten vid Lunds universitet under läsåret 2016/17. SI-programmet vid Lunds universitet är omfattande med verksamhet på sex av universitetets fakulteter. Totalt har vi årligen ca 230 verksamma SIledare i ett sjuttiotal kurser. Organisationen av SI varierar mellan de olika fakulteterna. En ytterlighet finns vid LTH och naturvetenskaplig fakultet där verksamheten är starkt centraliserad. Den andra ytterligheten är vid samhällsvetenskaplig fakultet där SI-verksamheten är decentraliserad till de olika ämnena. Det som förenar de olika verksamhetsansvariga är den entusiasm som finns för SI-konceptet samt de dedikerade studenter som är SI-ledare. Närvaron på SI-möten är relativt god. Totalt har vi över 4000 studenter vid Lunds universitet som nyttjar SI varje år och en närvaro kring 30 % av kursregistrerade i snitt. Antalet deltagare på ett SI-möte ligger kring 10 i medeltal med en standardavvikelse kring 5 studenter, vilket ger goda förutsättningar för produktiva SI-möten generellt sett. De utvärderingar som gjorts av sambandet mellan SI-närvaro och kursresultat antyder att aktivt deltagande på SI ökar chanserna till ett bra resultat på kursen oavsett ämne. En specialundersökning i en kurs i matematik antyder också att alla studenter verkar gynnas av att gå på SI oavsett förkunskapsnivå. Enkätutvärderingar bland deltagarna antyder att den främsta drivkraften att delta på SI är att förstå kursmaterialet oavsett ämne och fakultet. Strategiska motiv som att klara kursen är normalt underordnade även om detta varierar beroende på fakultet/ämne. Det är roligt att konstatera att studiesocial interaktion mestadels värderas högt som motiv att delta på SI. Arbetsmiljön på SI upplevs som bra (lätt att fråga, lättsam, positiv och stödjande atmosfär samt lagom tempo) och generellt verkar mötena följa SI-metodiken väl. Oavsett fakultet verkar majoriteten av deltagarna känna att SI-mötena hjälper dem i deras kursarbete. De får en bättre förståelse av vad som förväntas av dem i kursen, ett ökat intresse för ämnet samt stöd i kursarbetet. De allra flesta verkar känna att de får en betydligt djupare förståelse för det kursmaterial man går igenom på SI-mötena. Dessutom upplever många att de sannolikt kommer att förbättra sitt kursresultat genom deltagande på SI. Detta antagande stödjs också som nämnts ovan av SI-närvaro och examinationsstatistik från kurser och ju högre SI närvaro desto bättre verkar det gå oavsett ämnesområde. Att döma av deltagarnas enkätsvar är det inte bara kursen med tillhörande SI som gynnas av SI-deltagande. Flera generella färdigheter tränas som bör gynna studenter i studier i andra kurser utan SI. Många deltagare upplever att färdigheter som problemlösningsförmåga, kritiskt tänkande, lagsamverkan och samarbete, presentation inför andra och sätt att studera utvecklats genom att delta på SI. Dessutom får flera ett förbättrat självförtroende i sina studier samt ett ökat nätverk av studiekamrater. Tidigare studier vid LTH antyder att de som deltagit på SI också presterar bättre i andra kurser utan SI och att de är mindre benägna att göra studieavbrott och tar ut examen i högre utsträckning (Malm, Bryngfors, & Mörner, 2012; Malm, Bryngfors, & Mörner, 2015; Malm, Bryngfors, & Fredriksson, 2017). Deltagarnas svar på frågan med ”Vad tycker du är det bästa med SI-mötena?” betonar möjligheten till diskussion och social interaktion, en god studiemiljö samt förståelseinriktad studietid. Detta gäller oavsett ämnesområde. Vad kan då förbättras med SI-mötena? Några antyder att strukturen/effektiviteten på mötena kan vara bristande. Detta kan i sin tur bero av att stödet för SI-ledare i form av observationer och handledning inte alltid fungerar som det skall. Detta är något att titta närmare på inom universitetet. Annat som kan förbättras med SI-verksamheten är att man vill ha fler möten, mer tid till mötena eller bättre schematider. Internationellt anses det ofta att SI-ledarna är de största ”vinnarna” i SI-konceptet pga de ledarskaps- och grupphanteringsfärdigheter de erhåller. Detta antyds även i enkätutvärderingarna för SI-ledare vid Lunds universitet. SI-ledarna verkar dessutom få ett bättre självförtroende, djupare förståelse av kursämnet samt bli bättre på att prata inför andra. Både deltagare och SI-ledare är generellt nöjda med sina möten.
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| 6. |
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| 7. |
- Moberg, Christina, et al.
(författare)
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De unga gör helt rätt när de stämmer staten
- 2022
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Ingår i: Aftonbladet. - 1103-9000.
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- 1 620 forskare och lärare i forskarvärlden: Vi ställer oss bakom Auroras klimatkrav
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| 8. |
- Vareman, Niklas, et al.
(författare)
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Kan riskbedömare och riskhanterare leva åtskilda?
- 2005
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Ingår i: Risk och det levande mänskliga. - 9157804559 ; , s. 181-210
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- I det här kapitlet tar vi upp två vetenskapsteoretiska problem med att skilja mellan riskbedömning och riskhantering som har med ”externt” inflytande att göra. Den ena formen av inflytande begränsar våra möjligheter att genomföra en forskningsuppgift. Den andra formen har med utgångspunkten eller frågeställningen för vår forskning att skaffa. Även i de fall där vetenskapen drivs helt av forskarens egen nyfikenhet och bara strävar efter kunskap och sanning, spelar helt andra värden en viktig roll på vägen mot dessa mål. Dessa begränsningar återkommer i riskbedömningen och riskbedömaren måste förhålla sig till dem på något sätt. De utgör en första form av externt inflytande som komplicerar förhållandet mellan de två verksamheterna och i värsta fall undergräver distinktionen. Det ingår nämligen ett mått av riskhantering i varje riskbedömning vilket kastar tvivel över (1) vår vilja att riskhanteringen motsvarar samhällets önskemål och behov; och politiska och andra externa hänsyn tas vid riskbedömningen vilket gör att (2) vår vilja att inte politiska hänsyn tas vid bedömningen av fakta är problematisk. Den andra formen av externt inflytande tar sin utgångspunkt i att kunskap är svar på frågor. Men vem är det som ställer frågorna och varför? Inte sällan tillförs här en extern komponent och i risksammanhang blir det, som vi ska se, till och med fruktbart att prata om ett riskformuleringsprivilegium. Det är riskhanteraren snarare än riskbedömaren som besitter detta privilegium som i hög grad påverkar både vilka bedömningar som är relevanta att göra och vilken säkerhet som kan uppnås i dem.
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| 9. |
- Wahlberg, Lena, et al.
(författare)
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Nya perspektiv på robusthet
- 2005
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Ingår i: Risk och det levande mänskliga. - 9157804559 ; , s. 211-233
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Den här uppsatsen handlar just om robusthet. Nu påbjuder traditionen att man delar upp beslutsunderlag i två sorters komponenter: en som har med hur världen (sannolikt) ser ut och en som har med värdet av detta att göra. Moralen har mest att göra med värdekomponenten. Frågan om moralisk robusthet kommer upp just när man försöker analysera ett visst ställningstagande med avseende på värdefrågor. Kunskapskomponenten, som har med hur världen (sannolikt) ser ut att göra, är förstås också intressant att analysera ur robusthetshänseende. Vi talar då om epistemisk robusthet. Längre fram i uppsatsen ser vi närmare på hur man brukar karakterisera den. Men låt oss först säga något om målet med denna övning. Vi är intresserade av att leta efter likheter mellan och konsekvenser av de här två sorternas robusthet för att vi anser att de är viktiga för att förklara varför vi handlar som vi gör. Speciellt tror vi att frågor som rör samhällets riskhantering har mycket att vinna på en genomlysning av problematiken. Vi använder oss av robusthet i juridiken som en brygga mellan de två sorternas robusthet för vi tror att den utgör en sådan mellanform som ställer några frågor på sin spets och underlättar vår studie också genom att bidra med empiriskt innehåll. Det kan redan nu vara av intresse att studera hur robusthet i juridiken förhåller sig till moralisk robusthet.
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| 10. |
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| 11. |
- Andell, Pontus, et al.
(författare)
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Intravascular Ultrasound Guidance Is Associated With Better Outcome in Patients Undergoing Unprotected Left Main Coronary Artery Stenting Compared With Angiography Guidance Alone
- 2017
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Ingår i: Circulation. Cardiovascular Interventions. - : Lippincott Williams & Wilkins. - 1941-7640 .- 1941-7632. ; 10:5
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Tidskriftsartikel (refereegranskat)abstract
- Background: Small observational studies have indicated better outcome with intravascular ultrasound (IVUS) guidance when performing unprotected left main coronary artery (LMCA) percutaneous coronary intervention (PCI), but the overall picture remains inconclusive and warrants further investigation. We studied the impact of IVUS guidance on outcome in patients undergoing unprotected LMCA PCI in a Swedish nationwide observational study.Methods and Results: Patients who underwent unprotected LMCA PCI between 2005 and 2014 because of stable coronary artery disease or acute coronary syndrome were included from the nationwide SCAAR (Swedish Coronary Angiography and Angioplasty Registry). Of 2468 patients, IVUS guidance was used in 621 (25.2%). The IVUS group was younger (median age, 70 versus 75 years) and had fewer comorbidities but more complex lesions. IVUS was associated with larger stent diameters (median, 4 mm versus 3.5 mm). After adjusting for potential confounders, IVUS was associated with significantly lower occurrence of the primary composite end point of all-cause mortality, restenosis, or definite stent thrombosis (hazard ratio, 0.65; 95% confidence interval, 0.50-0.84) and all-cause mortality alone (hazard ratio, 0.62; 95% confidence interval, 0.47-0.82). In 340 propensity score-matched pairs, IVUS was also associated with significantly lower occurrence of the primary end point (hazard ratio, 0.54; 95% confidence interval, 0.37-0.80).Conclusions: IVUS was associated with an independent and significant outcome benefit when performing unprotected LMCA PCI. Potential mediators of this benefit include larger and more appropriately sized stents, perhaps translating into lower risk of subsequent stent thrombosis. Although residual confounding cannot be ruled out, our findings indicate a possible hazard when performing unprotected LMCA PCI without IVUS guidance.
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| 12. |
- Bahrami, Alireza, et al.
(författare)
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Evaluation of Untreated and Surface-Treated Wooden Facades of Buildings in Sweden
- 2023
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Ingår i: Coatings. - : MDPI. - 2079-6412. ; 13:4
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Tidskriftsartikel (refereegranskat)abstract
- In this research, untreated and surface-treated wooden facades of buildings are investigated and compared with regard to durability, environmental impact, and cost using the document and literature studies supplemented with quantitative data. The investigation is based on the influence on the wood by external factors, either in its natural form or with a protective layer of a surface treatment. It is resulted from the study that from a durability viewpoint, it is not always advantageous to paint a wooden facade. Yakisugi, a thermal modification for wooden facades that involves burning the wood to create a protective surface layer, has shown better properties, which, in combination with a lower need for maintenance, can be considered the leading treatment for facades. From an environmental perspective, Yakisugi, like untreated wood, has demonstrated advantages compared with conventional paints. Paints often come with maintenance requirements that should be carried out correctly to avoid extensive costs. Cost is an important factor that can be decisive when users choose a surface treatment. What determines the cost is the relationship between durability and maintenance intervals. The need for the maintenance of paints leads to large financial costs during the working life of a wooden facade, which differs from Yakisugi or an untreated wooden facade that can be considered maintenance-free. In order to meet the growing environmental demands from a national level to a global scale, unconventional surface treatments for wooden facades should be promoted in the future.
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| 13. |
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| 14. |
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| 15. |
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| 16. |
- Björkander, Sofia, et al.
(författare)
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Childhood allergy is preceded by an absence of gut lactobacilli species and higher levels of atopy-related plasma chemokines
- 2020
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Ingår i: Clinical and Experimental Immunology. - : Oxford University Press (OUP). - 0009-9104 .- 1365-2249. ; 202:3, s. 288-299
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Tidskriftsartikel (refereegranskat)abstract
- Alterations in the composition and reduced diversity of the infant microbiome are associated with allergic disease in children. Further, an altered microbiota is linked to immune dysregulation, including skewing of different T helper (Th) subsets, which is also seen in atopic individuals. The aim of this study was, therefore, to investigate the associations between gut lactobacilli and Th‐related plasma factors in allergy development during childhood. A total of 194 children with known allergy status at 1 year of age were followed to 10 years of age. We used real‐time polymerase chain reaction (PCR) to investigate the presence of three lactobacilli species (Lactobacillus casei, L. paracasei, L. rhamnosus) in infant fecal samples (collected between 1 week and 2 months of age) from a subgroup of children. Plasma chemokines and cytokines were quantified at 6 months and at 1, 2, 5 and 10 years of age with Luminex or enzyme‐linked immunosorbent assay (ELISA). Fractional exhaled nitrogen oxide (FeNO) was measured and spirometry performed at 10 years of age. The data were analysed by non‐parametric testing and a logistic regression model adjusted for parental allergy. An absence of these lactobacilli and higher levels of the chemokines BCA‐1/CXCL13, CCL17/TARC, MIP‐3α/CCL20 and MDC/CCL22 in plasma at 6 months of age preceded allergy development. The presence of lactobacilli associated with lower levels of atopy‐related chemokines during infancy, together with higher levels of interferon (IFN)‐γ and lower FeNO during later childhood. The results indicate that the presence of certain lactobacilli species in the infant gut may influence allergy‐related parameters in the peripheral immune system, and thereby contribute to allergy protection.
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| 17. |
- Björkander, Sofia, et al.
(författare)
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Pregnancy-associated inflammatory markers are elevated in pregnant women with systemic lupus erythematosus
- 2012
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Ingår i: Cytokine. - : Elsevier BV. - 1043-4666 .- 1096-0023. ; 59:2, s. 392-399
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Tidskriftsartikel (refereegranskat)abstract
- During normal pregnancy a dampening in T cell-mediated immunity is compensated by an increased pro-inflammatory activity. Likewise, the autoimmune disease systemic lupus erythematosus (SLE) is associated with inflammatory activity and pregnancy complications occur frequently in women with SLE. The aim of this study was to elucidate how SLE influences the chemokine and cytokine balance during and after pregnancy. Blood samples were taken from pregnant women with or without SLE at second and third trimester and 8-12 weeks after pregnancy. Cytokines (interleukin (IL)-1 beta, IL-2, IL-4, IL-6, IL-10, IL-12p70, IL-17A, TNF, IFN-gamma and IFN-alpha), chemokines (CXCL8/IL-8, CXCL9/MIG, CXCL10/IP-10, CCL2/MCP-1, CCL5/RANTES and CCL17/TARC), soluble IL-6 receptor (sIL-6R) and soluble glycoprotein 130 (gp130) were measured in serum using cytometric bead array (CBA) or enzyme-linked immunosorbent assay (ELISA). Women with SLE had increased serum concentrations of CXCL8/IL-8, CXCL9/MIG, CXCL10/IP-10 and IL-10 compared to controls both during and after pregnancy. Further, when dividing the patients based on disease activity, the women with active disease had the highest levels. Importantly, women with SLE seemed to respond to pregnancy in a similar way as controls, since the changes of cytokines and chemokines over the course of pregnancy were similar but with overall higher levels in the patient group. In conclusion, changes in pro- and anti-inflammatory serum components during pregnancy in women with SLE, occurring on top of already more pro-inflammatory levels, might increase their risk for pregnancy complications and flares. How their children are affected by this heightened inflammatory milieu during pregnancy needs further investigation.
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| 18. |
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| 19. |
- Borg, O. Anders, et al.
(författare)
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A Computational Study on the Lowest Triplet State of Ruthenium Polypyridyl Complexes used in Artificial Photosynthesis
- 2008
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Ingår i: Journal of Physical Chemistry A. - : American Chemical Society (ACS). - 1089-5639 .- 1520-5215. ; 112:19, s. 4470-4476
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Tidskriftsartikel (refereegranskat)abstract
- The potential energy surfaces of the first excited triplet state of some ruthenium polypyridyl complexes were investigated by means of density functional theory. Focus was placed on the interaction between the geometrical changes accompanying the photoactivity of these complexes when used as antenna complexes in artificial photosynthesis and dye-sensitized solar cells and the accompanying changes in electronic structure. The loss process (3)MLCT --> (3)MC can be understood by means of ligand-field splitting, traced down to the coordination of the central ruthenium atom.
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| 20. |
- Borgmästars, Emmy, et al.
(författare)
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Comparison of Skimmed Milk and Lanthanum Flocculation for Concentration of Pathogenic Viruses in Water
- 2021
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Ingår i: Food and Environmnetal Virology. - : Springer. - 1867-0334 .- 1867-0342. ; 13:3, s. 380-389
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Tidskriftsartikel (refereegranskat)abstract
- Concentration of viruses in water is necessary for detection and quantification of the viruses present, in order to evaluate microbiological barriers in water treatment plants and detect pathogenic viruses during waterborne outbreaks, but there is currently no standardised procedure. In this study, we implemented a previously described fast and simple lanthanum-based protocol for concentration of norovirus genogroup I (GI), genogroup II (GII) and hepatitis A virus (HAV) in drinking and surface water. We compared the results with those of a widely used skimmed milk flocculation method, followed by nucleic acid extraction and RT-qPCR detection. Three seeding levels, with intended concentrations 5 × 103, 5 × 104 and 5 × 105 genome copies/10 L, were added to drinking water or surface water. All seed levels were detected with both flocculation methods. Samples extracted with skimmed milk flocculation had on average 1.82, 1.86 and 1.38 times higher measured concentration of norovirus GI, GII and HAV, respectively, than those extracted with lanthanum flocculation, across all seeding levels and water types tested. Mengovirus was used as a positive process control. Mengovirus recovery was higher for skimmed milk (40.7% in drinking water, 26.0% in surface water) than for lanthanum flocculation (24.4% in drinking water, 9.7% in surface water). Together, this indicates that skimmed milk flocculation provides higher viral recovery than lanthanum flocculation. However, lanthanum-based flocculation can be performed much faster than skimmed milk flocculation (1.5 h versus 16 h flocculation time) and thus could be a good alternative for rapid monitoring of viruses in water.
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| 21. |
- Borgmästars, Emmy, et al.
(författare)
-
Improved Detection of Norovirus and Hepatitis A Virus in Surface Water by Applying Pre-PCR Processing
- 2017
-
Ingår i: Food and Environmental Virology. - : Springer Science and Business Media LLC. - 1867-0334 .- 1867-0342. ; 9:4, s. 395-405
-
Tidskriftsartikel (refereegranskat)abstract
- Quantitative reverse transcriptase polymerase chain reaction (RT-qPCR) detection of waterborne RNA viruses generally requires concentration of large water volumes due to low virus levels. A common approach is to use dead-end ultrafiltration followed by precipitation with polyethylene glycol. However, this procedure often leads to the co-concentration of PCR inhibitors that impairs the limit of detection and causes false-negative results. Here, we applied the concept of pre-PCR processing to optimize RT-qPCR detection of norovirus genogroup I (GI), genogroup II (GII), and hepatitis A virus (HAV) in challenging water matrices. The RT-qPCR assay was improved by screening for an inhibitor-tolerant master mix and modifying the primers with twisted intercalating nucleic acid molecules. Additionally, a modified protocol based on chaotropic lysis buffer and magnetic silica bead nucleic acid extraction was developed for complex water matrices. A validation of the modified extraction protocol on surface and drinking waters was performed. At least a 26-fold improvement was seen in the most complex surface water studied. The modified protocol resulted in average recoveries of 33, 13, 8, and 4% for mengovirus, norovirus GI, GII, and HAV, respectively. The modified protocol also improved the limit of detection for norovirus GI and HAV. RT-qPCR inhibition with Cq shifts of 1.6, 2.8, and 3.5 for norovirus GI, GII, and HAV, respectively, obtained for the standard nucleic acid extraction were completely eliminated by the modified protocol. The standard nucleic acid extraction method worked well on drinking water with no RT-qPCR inhibition observed and average recoveries of 80, 124, 89, and 32% for mengovirus, norovirus GI, GII, and HAV, respectively.
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| 22. |
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| 23. |
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| 24. |
- Bryhn, Andreas, et al.
(författare)
-
Fisk- och skaldjursbestånd i hav och sötvatten 2020 : Resursöversikt
- 2021
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- I rapporten kan du ta del av bedömningen som görs av situationen för bestånd som regleras inom ramen för EU:s gemensamma fiskeripolitik (GFP). Bedömningarna baseras på det forskningssamarbete och den rådgivning som sker inom det Internationella Havsforskningsrådet (ICES). Totalt redovisas underlag och råd för 48 fisk- och skaldjursarter.De bestånd som förvaltas nationellt baseras på de biologiska underlagen, och rådgivningen i huvudsak på den forskning och övervakning samt analys som bedrivs av Institutionen för akvatiska resurser vid Sveriges lantbruksuniversitet (SLU Aqua) samt yrkesfiskets rapportering.
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| 25. |
- Chábera, Pavel, et al.
(författare)
-
A low-spin Fe(iii) complex with 100-ps ligand-to-metal charge transfer photoluminescence
- 2017
-
Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 543:7647, s. 695-699
-
Tidskriftsartikel (refereegranskat)abstract
- Transition-metal complexes are used as photosensitizers1, in light-emitting diodes, for biosensing and in photocatalysis2. A key feature in these applications is excitation from the ground state to a charge-transfer state3,4; the long charge-transfer-state lifetimes typical for complexes of ruthenium5 and other precious metals are often essential to ensure high performance. There is much interest in replacing these scarce elements with Earth-abundant metals, with iron6 and copper7 being particularly attractive owing to their low cost and non-toxicity. But despite the exploration of innovative molecular designs6,8,9,10, it remains a formidable scientific challenge11 to access Earth-abundant transition-metal complexes with long-lived charge-transfer excited states. No known iron complexes are considered12 photoluminescent at room temperature, and their rapid excited-state deactivation precludes their use as photosensitizers13,14,15. Here we present the iron complex [Fe(btz)3]3+ (where btz is 3,3′-dimethyl-1,1′-bis(p-tolyl)-4,4′-bis(1,2,3-triazol-5-ylidene)), and show that the superior σ-donor and π-acceptor electron properties of the ligand stabilize the excited state sufficiently to realize a long charge-transfer lifetime of 100 picoseconds (ps) and room-temperature photoluminescence. This species is a low-spin Fe(iii) d5 complex, and emission occurs from a long-lived doublet ligand-to-metal charge-transfer (2LMCT) state that is rarely seen for transition-metal complexes4,16,17. The absence of intersystem crossing, which often gives rise to large excited-state energy losses in transition-metal complexes, enables the observation of spin-allowed emission directly to the ground state and could be exploited as an increased driving force in photochemical reactions on surfaces. These findings suggest that appropriate design strategies can deliver new iron-based materials for use as light emitters and photosensitizers.
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| 26. |
- Dagöö, Jesper, et al.
(författare)
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Cognitive behavior therapy versus interpersonal psychotherapy for social anxiety disorder delivered via smartphone and computer: A randomized controlled trial
- 2014
-
Ingår i: Journal of Anxiety Disorders. - : Elsevier BV. - 1873-7897 .- 0887-6185. ; 28:4, s. 410-417
-
Tidskriftsartikel (refereegranskat)abstract
- In this study, a previously evaluated guided Internet-based cognitive behavior therapy for social anxiety disorder (SAD) was adapted for mobile phone administration (mCBT). The treatment was compared with a guided self-help treatment based on interpersonal psychotherapy (mIPT). The treatment platform could be accessed through smartphones, tablet computers, and standard computers. A total of 52 participants were diagnosed with SAD and randomized to either mCBT (n = 27) or mIPT (n = 25). Measures were collected at pre-treatment, during the treatment, post-treatment and 3-month follow-up. On the primary outcome measure, the Liebowitz Social Anxiety Scale - self-rated, both groups showed statistically significant improvements. However, mCBT performed significantly better than mIPT (between group Cohen's d = 0.64 in favor of mCBT). A larger proportion of the mCBT group was classified as responders at post-treatment (55.6% versus 8.0% in the mIPT group). We conclude that CBT for SAD can be delivered using modern information technology. IPT delivered as a guided self-help treatment may be less effective in this format. (c) 2014 Elsevier Ltd. All rights reserved.
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| 27. |
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| 28. |
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| 29. |
- Egard, Mikael, et al.
(författare)
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Vertical InAs nanowire wrap gate transistors with f(t) > 7 GHz and f(max) > 20 GHz.
- 2010
-
Ingår i: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 10:3, s. 809-812
-
Tidskriftsartikel (refereegranskat)abstract
- In this letter we report on high-frequency measurements on vertically standing III-V nanowire wrap-gate MOSFETs (metal-oxide-semiconductor field-effect transistors). The nanowire transistors are fabricated from InAs nanowires that are epitaxially grown on a semi-insulating InP substrate. All three terminals of the MOSFETs are defined by wrap around contacts. This makes it possible to perform high-frequency measurements on the vertical InAs MOSFETs. We present S-parameter measurements performed on a matrix consisting of 70 InAs nanowire MOSFETs, which have a gate length of about 100 nm. The highest unity current gain cutoff frequency, f(t), extracted from these measurements is 7.4 GHz and the maximum frequency of oscillation, f(max), is higher than 20 GHz. This demonstrates that this is a viable technique for fabricating high-frequency integrated circuits consisting of vertical nanowires.
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| 30. |
- Ekesbo, Rickard, et al.
(författare)
-
Lack of adherence to hypertension treatment guidelines among GPs in southern Sweden-A case report- based survey
- 2012
-
Ingår i: BMC Family Practice. - : Springer Science and Business Media LLC. - 1471-2296. ; 13
-
Tidskriftsartikel (refereegranskat)abstract
- Background: General practitioners (GPs) often fail to correctly adhere to guidelines for the treatment of hypertension. The reasons for this are unclear, but could be related to lack of knowledge in assessing individual patients' cardiovascular disease risk. Our aim was to investigate how GPs in southern Sweden adhere to clinical guidelines for the treatment of hypertension when major cardiovascular risk factors are taken into consideration. Method: A questionnaire with five genuine cases of hypertension with different cardiovascular risk profiles was sent to a random sample of GPs in southern Sweden (n = 109) in order to investigate the attitude towards blood pressure (BP) treatment when major cardiovascular risk factors were present. Results: In general, GPs who responded tended to focus on the absolute target BP rather than assessing the entire cardiovascular risk factor profile. Thus, cases with the highest risk of cardiovascular disease were not treated accordingly. However, there was also a tendency to overtreat the lowest risk individuals. Furthermore, the BP levels for initiating pharmacological treatment varied widely (systolic BP 140-210 mmHg). ACE inhibitors (70%) were the most common first choice of pharmacological treatment. Conclusion: In this study, GPs in Southern Sweden were suggesting, for different cases, either under- or overtreatment in relation to current guidelines for treatment of hypertension. On reason may be that they failed to correctly assess individual cardiovascular risk factor profiles. Key points: Despite international and national clinical guidelines on the treatment of hypertension, general practitioners often fail to correctly assess the cardiovascular risk for patients in a clinical setting. Most GPs use target blood pressure levels but do not consider other cardiovascular risk factors. Both under- and overtreatment of high and low cardiovascular risk groups were seen in this study.
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| 31. |
- Elenis, Evangelia, 1983-, et al.
(författare)
-
Early initiation of anti-androgen treatment is associated with increased probability of spontaneous conception leading to childbirth in women with polycystic ovary syndrome : a population-based multiregistry cohort study in Sweden
- 2021
-
Ingår i: Human Reproduction. - : Oxford University Press. - 0268-1161 .- 1460-2350. ; 36:5, s. 1427-1435
-
Tidskriftsartikel (refereegranskat)abstract
- STUDY QUESTION: Is anti-androgen treatment during adolescence associated with an improved probability of spontaneous conception leading to childbirth in women with polycystic ovary syndrome (PCOS)?SUMMARY ANSWER: Early initiation of anti-androgen treatment is associated with an increased probability of childbirth after spontaneous conception among women with PCOS.WHAT IS KNOWN ALREADY: PCOS is the most common endocrinopathy affecting women of reproductive age. Hyperandrogenism and menstrual irregularities associated with PCOS typically emerge in early adolescence. Previous work indicates that diagnosis at an earlier age (<25 years) is associated with higher fecundity compared to a later diagnosis.STUDY DESIGN, SIZE, DURATION: This population-based study utilized five linked Swedish national registries. A total of 15 106 women with PCOS and 73 786 control women were included. Women were followed from when they turned 18 years of age until the end of 2015, leading to a maximum follow-up of 10 years. First childbirth after spontaneous conception was the main outcome, as identified from the Medical Birth Registry.PARTICIPANTS/MATERIALS, SETTING, METHODS: Participants included all women born between 1987 and 1996 with a diagnosis of PCOS in the Swedish Patient Registry and randomly selected non-PCOS controls (ratio 1:5). Information on anti-androgenic treatment was retrieved from the Swedish Prescribed Drug Registry with the use of Anatomic Therapeutic Chemical (ATC) codes. Women with PCOS who were not treated with any anti-androgenic medication were regarded as normo-androgenic, while those treated were regarded as hyperandrogenic. Women were further classified as being mildly hyperandrogenic if they received anti-androgenic combined oral contraceptive (aaCOC) monotherapy, or severely hyperandrogenic if they received other anti-androgens with or without aaCOCs. Early and late users comprised women with PCOS who started anti-androgenic treatment initiated either during adolescence (<= 18 years of age) or after adolescence (>18 years), respectively. The probability of first childbirth after spontaneous conception was analyzed with the use of Kaplan-Meier hazard curve. The fecundity rate (FR) and 95% confidence interval for the time to first childbirth that were conceived spontaneously were calculated using Cox proportional hazards regression models, with adjustment for obesity, birth year, country of birth and education level.MAIN RESULTS AND THE ROLE OF CHANCE: The probability of childbirth after spontaneous conception in the PCOS group compared to non-PCOS controls was 11% lower among normo-androgenic (adjusted FR 0.68 (95% CI 0.64-0.72)), and 40% lower among hyperandrogenic women with PCOS (adjusted FR 0.53 (95% CI 0.50-0.57)). FR was lowest among severely hyperandrogenic women with PCOS compared to normo-androgenic women with PCOS (adjusted FR 0.60 (95% CI 0.52-0.69)), followed by mildly hyperandrogenic women with PCOS (adjusted FR 0.84 (95% CI 0.77-0.93)). Compared to early anti-androgenic treatment users, late users exhibited a lower probability of childbirth after spontaneous conception (adjusted FR 0.79 (95% CI 0.68-0.92)).LIMITATIONS, REASONS FOR CAUTION: We lacked direct information on the intention to conceive and the androgenic biochemical status of the PCOS participants, applying instead the use of anti-androgenic medications as a proxy of hyperandrogenism. The duration of anti-androgenic treatment utilized is not known, only the age at prescription. Results are not adjusted for BMI, but for obesity diagnosis. The period of follow-up ( 10 years) was restricted by the need to include only those women for whom data were available on the dispensing of medications during adolescence (born between 1987 and 1996). Women with PCOS who did not seek medical assistance might have been incorrectly classified as not having the disease. Such misclassification would lead to an underestimation of the true association between PCOS and outcomes.WIDER IMPLICATIONS OF THE FINDINGS: Early initiation of anti-androgen treatment is associated with better spontaneous fertility rate. These findings support the need for future interventional randomized prospective studies investigating critical windows of anti-androgen treatment.
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| 32. |
- Enhörning, Sofia, et al.
(författare)
-
Copeptin, a marker of vasopressin, in abdominal obesity, diabetes and microalbuminuria: the prospective Malmö Diet and Cancer Study cardiovascular cohort.
- 2013
-
Ingår i: International Journal of Obesity. - : Springer Science and Business Media LLC. - 1476-5497 .- 0307-0565. ; 37:4, s. 598-603
-
Tidskriftsartikel (refereegranskat)abstract
- Background: High plasma copeptin (copeptin), the C-terminal fragment of arginine vasopressin pro-hormone, has been associated with the metabolic syndrome (MetS), diabetes mellitus (DM) development and nephropathy. Here we tested whether elevated copeptin level is associated with later development of the MetS, its individual components and microalbuminuria. Methods: We analysed copeptin at baseline (1991-1994) in the population-based Malmö Diet and Cancer Study cardiovasular cohort and re-examined 2064 subjects 15.8 years later (mean age 72.8 years, 59% women) with oral glucose tolerance test and measurement of MetS and its individual components. Results: After age and sex adjustment, increasing quartiles of copeptin at baseline (the lowest quartile as reference) were associated with MetS (P for trend=0.008), incident abdominal obesity (P for trend=0.002), DM (P for trend=0.001) and microalbuminuria (P for trend=0.002). After additional adjustment for all the MetS components at baseline, increasing copeptin quartiles predicted incident abdominal obesity (odds ratios 1.55, 1.30 and 1.59; P for trend=0.04), DM (odds ratios 1.18, 1.32 and 1.46; P for trend=0.04) and microalbuminuria (odds ratios 1.05, 1.08 and 1.65; P for trend=0.02) but not MetS (P for trend=0.19) at the reexamination. Further, the relationship between copeptin and microalbuminuria was independent of baseline C-reactive protein, incident DM and incident hypertension. Conclusion: Copeptin independently predicts DM and abdominal obesity but not the cluster of MetS. Apart from predicting DM and abdominal obesity, elevated copeptin signals increased risk of microalbuminuria. Interestingly, the association between copeptin and later microalbuminuria was independent of both prevalent and incident DM and hypertension. Our findings suggest a relationship between a dysregulated vasopressin system and cardiometabolic risk, which could have implications for risk assessment and novel preventive treatments.
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| 33. |
- Enhörning, Sofia, et al.
(författare)
-
Effects of hydration on plasma copeptin, glycemia and gluco-regulatory hormones : a water intervention in humans
- 2019
-
Ingår i: European Journal of Nutrition. - : Springer Science and Business Media LLC. - 1436-6207 .- 1436-6215. ; 58:1, s. 315-324
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: High plasma copeptin, a marker of vasopressin, predicts diabetes mellitus. We tested if copeptin could be suppressed by increased water intake in healthy individuals, and if a water-induced change in copeptin was accompanied by altered concentrations of glucose, insulin or glucagon. Methods: Thirty-nine healthy individuals underwent, in random order, 1 week of high water intake (3 L/day on top of habitual intake) and 1 week of normal (habitual) fluid intake (control). Fasting plasma concentrations of copeptin, glucose, insulin and glucagon were compared between the ends of both periods. Furthermore, acute copeptin kinetics were mapped for 4 h after ingestion of 1 L of water. Results: After acute intake of 1 L water, copeptin was significantly reduced within 30 min, and reached maximum reduction within 90 min with on average 39% reduction (95% confidence interval (95 CI) 34–45) (p < 0.001) and remained low the entire test period (4 h). One week of increased water intake led to a 15% reduction (95 CI 5–25) (p = 0.003) of copeptin compared to control week. The greatest reduction occurred among subjects with habitually high copeptin and concentrated urine (“water-responders”). Water-responders had significant water-induced reduction of glucagon, but glucose and insulin were unaffected. Conclusions: Both acute and 1 week extra water intake potently reduced copeptin concentration. In those with the greatest decline (water-responders), who are typically low drinkers with high baseline copeptin, water induced a reduction in fasting glucagon. Long-term trials assessing the effect of water on glucometabolic traits should focus on low-water drinkers with high copeptin concentration.
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| 34. |
- Enkirch, Theresa, et al.
(författare)
-
Hepatitis A outbreak linked to imported frozen strawberries by sequencing, Sweden and Austria, June to September 2018
- 2018
-
Ingår i: Eurosurveillance. - : European Centre for Disease Prevention and Control. - 1025-496X .- 1560-7917. ; 23:41
-
Tidskriftsartikel (refereegranskat)abstract
- Between June-September 2018, 20 hepatitis A cases were notified in six counties in Sweden. Combined epidemiological and microbiological investigations identified imported frozen strawberries produced in Poland as the source of the outbreak. Sequence analysis confirmed the outbreak strain IB in the strawberries with 100 % identity and the respective batch was withdrawn. Sharing the sequence information internationally led to the identification of 14 additional cases in Austria, linked to strawberries from the same producer.
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| 35. |
- Ewerlöf, Sofia, et al.
(författare)
-
DN Debatt. ”Låt gräsklipparen stå – för naturens skull”
- 2023
-
Ingår i: Dagens nyheter (DN debatt). - 1101-2447.
-
Tidskriftsartikel (populärvet., debatt m.m.)abstract
- In an era of species extinction and climate change, we should abandon the well-trimmed lawn and let gardens grow wilder, writes Anna Persson and other researchers and landscape architects on DN Debatt.
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| 36. |
- Fahlvik Svensson, Sofia, et al.
(författare)
-
Lineshape of the thermopower of quantum dots
- 2012
-
Ingår i: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 14
-
Tidskriftsartikel (refereegranskat)abstract
- Quantum dots are an important model system for thermoelectric phenomena, and may be used to enhance the thermal-to-electric energy conversion efficiency in functional materials, by tuning the Fermi energy relative to the dots' transmission resonances. It is therefore important to obtain a detailed understanding of a quantum dot's thermopower as a function of the Fermi energy. However, so far it has proven difficult to take the effects of interactions into account in the interpretation of experimental data. In this paper, we present detailed measurements of the thermopower of quantum dots defined in heterostructure nanowires. We show that the thermopower lineshape is described well by a Landauer-type transport model that uses as its input experimental values of the dot conductance, which contains information about interaction effects.
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| 37. |
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| 38. |
- Fowler, Christopher J, et al.
(författare)
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Targeting the endocannabinoid system for the treatment of cancer : a practical view
- 2010
-
Ingår i: Current Topics in Medicinal Chemistry. - : Bentham Science Publishers. - 1568-0266 .- 1873-4294. ; 10:8, s. 814-827
-
Forskningsöversikt (refereegranskat)abstract
- In recent years, considerable interest has been generated by findings that cannabinoids not only have useful palliative effects, but also can affect the viability and invasivity of a variety of different cancer cells. In the present review, the potential of targeting the cannabinoid system for the treatment of cancer is considered from a practical, rather than a mechanistic viewpoint, addressing questions such as whether human tumour cells express CB receptors; whether the potencies of action of cannabinoids in vitro match the potencies expected on the base of receptor theory; what is known about the in vivo effects of cannabinoids and cancer, and how relevant the experiments undertaken are to the clinical situation; and finally, what approaches can be taken to minimise unwanted effects of cannabinoid treatment. It is concluded that cannabinoids (or agents modulating the endogenous cannabinoid system) are an attractive target for drug development in the cancer area, but that more in vivo studies, particularly those investigating the potential of cannabinoids as an addition to current treatment strategies, are needed.
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| 39. |
- Frankki, Sofia, et al.
(författare)
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Mobility of Chloroaromatic Compounds in Soil: Case Studies of Swedish Chlorophenol-contaminated Sawmill Sites
- 2007
-
Ingår i: AMBIO: A Journal of the Human Environment. ; 36:6, s. 452–7-
-
Tidskriftsartikel (refereegranskat)abstract
- This paper summarizes recent studies on the environmental fate of chloroaromatic compounds in chlorophenol (CP)-contaminated soil and groundwater at Swedish sawmill sites. Relative proportions of CPs, polychlorinated phenoxy phenols (PCPPs), polychlorinated diphenyl ethers (PCDEs), polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) were determined in preservatives, particulate organic matter (POM), dissolved organic matter (DOM), groundwater, and particles filtered from groundwater. All compound classes were found in the different compartments. The fraction of PCPPs, PCDEs, PCDDs, and PCDFs had increased in the soil samples relative to the proportions in the preservatives. This increase showed correlation with the hydrophobicity, that is, PCDDs had the largest increase. Similar correlation was found between hydrophobicity and the importance of partitioning to POM over DOM. The more water soluble compound group, CP, was found equally distributed between POM and DOM. For PCPPs, PCDEs, PCDDs, and PCDFs, the relative partitioning to POM increased with increased hydrophobicity. Despite the relative partitioning towards POM, compared with DOM, cotransport with DOM and suspended colloidal fractions was found to substantially increase the transport of these compounds in the groundwater samples.
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| 40. |
- Frankki, Sofia, et al.
(författare)
-
Partitioning of chloroaromatic compounds between the aqueous phase and dissolved and particulate soil organic matter at chlorophenol contaminated sites
- 2007
-
Ingår i: Environmental Pollution. - : Elsevier BV. - 0269-7491. ; 148:1, s. 182-90
-
Tidskriftsartikel (refereegranskat)abstract
- The retention and mobility of hydrophobic organic contaminants (HOCs) in soil is mainly determined by hydrophobic partitioning to dissolved and particulate organic matter (DOM and POM, respectively). The aqueous phase, DOM, and POM fractions were extracted and separated from soils at three sites contaminated with technical chlorophenol formulations. Concentrations of chlorophenols (CP), polychlorinated phenoxyphenols (PCPP), polychlorinated diphenyl ethers (PCDE) and polychlorinated dibenzo-p-dioxins and furans (PCDD/F) were determined. The partitioning to POM, in relation to DOM, increased in all three soils with increasing hydrophobicity in the order CP < PCPP PCDE PCDF < PCDD. Differences in partitioning to DOM (log KDOC) and POM (log KPOC) could not be explained by differences in gross organic C chemistry. Black carbon did not contribute significantly to the sorption of PCDDs, whereas >70% wood fibre in one soil resulted in a decrease of log KPOC of 0.5 units for CPs and PCDDs. We conclude that log KOC for both DOM and POM need to be explicitly determined when the retention and mobility of HOCs is described and modelled in soils.Increasing hydrophobicity of organic compounds increases the partitioning to particulate natural organic matter relative to dissolved natural organic matter.
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| 41. |
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| 42. |
- Frankki, Sofia, et al.
(författare)
-
Partitioning of CPs, PCDEs, and PCDD/Fs between particulate and experimentally
- 2006
-
Ingår i: Environmental Science & Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 40:21, s. 6668-73
-
Tidskriftsartikel (refereegranskat)abstract
- We determined the distribution of hydrophobic organic contaminants (HOCs) to fractions of natural organic matter in a soil contaminated by chlorophenol wood preservatives more than 30 years ago. The concentration of dissolved organic matter (DOM) was enhanced in soil suspensions by raising pH to 6.8-9.1. After 48 h of desorption/equilibration, the DOM fraction was separated from the particulate organic matter (POM) of the soil by filtration. In the next step, DOM was flocculated by Al-nitrate, and free concentrations of HOCs were determined in the aqueous phase. The HOCs associated with DOM and POM were extracted with toluene. No significant differences in gross carbon chemistry were detected between DOM and POM, using X-ray photoelectron spectroscopy (XPS). Normalized to organic C, chlorophenols (CPs) showed a similar degree of partitioning between DOM and POM, whereas the partitioning of polychlorinated diphenyl ethers (PCDEs), polychlorinated dibenzo-p-dioxins, and furans (PCDD/Fs) was highly shifted toward POM. The partitioning to POM, relative to DOM, increased in the order PCDE < PCDF < PCDD, reflecting the hydrophobicity of the compounds.
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| 43. |
- Frankki, Sofia, et al.
(författare)
-
Partitioning of CPs, PCDEs, and PCDD/Fs between particulate and experimentally enhanced dissolved natural organic matter in a contaminated soil.
- 2006
-
Ingår i: Environmental Science and Technology. - : American Chemical Society. - 0013-936X .- 1520-5851. ; 40:21, s. 6668-73
-
Tidskriftsartikel (refereegranskat)abstract
- We determined the distribution of hydrophobic organic contaminants (HOCs) to fractions of natural organic matter in a soil contaminated by chlorophenol wood preservatives more than 30 years ago. The concentration of dissolved organic matter (DOM) was enhanced in soil suspensions by raising pH to 6.8-9.1. After 48 h of desorption/equilibration, the DOM fraction was separated from the particulate organic matter (POM) of the soil by filtration. In the next step, DOM was flocculated by Al-nitrate, and free concentrations of HOCs were determined in the aqueous phase. The HOCs associated with DOM and POM were extracted with toluene. No significant differences in gross carbon chemistry were detected between DOM and POM, using X-ray photoelectron spectroscopy (XPS). Normalized to organic C, chlorophenols (CPs) showed a similar degree of partitioning between DOM and POM, whereas the partitioning of polychlorinated diphenyl ethers (PCDEs), polychlorinated dibenzo-p-dioxins, and furans (PCDD/Fs) was highly shifted toward POM. The partitioning to POM, relative to DOM, increased in the order PCDE < PCDF < PCDD, reflecting the hydrophobicity of the compounds.
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| 44. |
- Fridberg, Marie, et al.
(författare)
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Immunohistochemical analyses of phosphatases in childhood B-cell lymphoma : lower expression of PTEN and HePTP and higher number of positive cells for nuclear SHP2 in B-cell lymphoma cases compared to controls
- 2008
-
Ingår i: Pediatric Hematology & Oncology. - : Taylor & Francis. - 0888-0018 .- 1521-0669. ; 25, s. 528-540
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Tidskriftsartikel (refereegranskat)abstract
- Although many pediatric B-cell lymphoma patients are being cured today, much is still unknown about the pathogenesis of this disease. Protein tyrosine phosphatases are involved in the control of survival, growth, and differentiation of cells. The authors have analyzed 26 pediatric B-cell lymphoma cases for the expression of a panel of phosphatases and report a statistically significant lower expression intensity of PTEN and HePTP and higher nuclear SHP2 expression in B-cell lymphoma cases compared to lymphoid tissue. Knowledge about the expression of key regulatory proteins in pediatric B-cell lymphomas is necessary for revealing the complex molecular background of this disease.
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| 45. |
- Frost, Rickard, 1979, et al.
(författare)
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Core−Shell Nanoplasmonic Sensing for Characterization of Biocorona Formation and Nanoparticle Surface Interactions
- 2016
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Ingår i: ACS Sensors. - : American Chemical Society (ACS). - 2379-3694. ; 1:6, s. 798-806
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Tidskriftsartikel (refereegranskat)abstract
- Surface properties of nanoparticles imposed by particle size, shape, and surface chemistry are key features that largely determine their environmental fate and effects on biological systems. Consequently, development of analytical tools to characterize surface properties of nanomaterials and their relation to toxicological properties must occur in parallel with applications. As a contribution to this quest, we present a nanoplasmonic sensing strategy that enables systematic in situ characterization of molecule−nanoparticle interactions under well-controlled conditions, in terms of both nanoparticle size and surface chemistry, with particular focus on the importance of surface faceting in crystalline nanoparticles. We assess the performance of our sensing strategy by presenting two case studies. (i) The first is protein corona formation on faceted Au core−SiO2 shell nanoparticles of different sizes, and thus different surface facet-to-edge ratios. Based on 2D and 3D models of the investigated structures, we find that for small particles the curved regions between adjacent facets dominate the response of the corona formation process, whereas the facets dominate the response in the large particle regime. (ii) The second is in situ functionalization of Au core−SiO2 shell nanoparticle surfaces, and analysis of the subsequent protein repellent behavior. Due to the versatility of the presented sensing strategy in studies of nanoparticle surface properties, including in situ surface modifications, and their interactions with (bio)molecules during corona formation, we foresee it to become a valuable tool in the areas of nanomedicine and nanotoxicology.
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| 46. |
- Gerward, Sofia, et al.
(författare)
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Trends in out-of-hospital ischaemic heart disease deaths 1992 to 2003 in southern Sweden.
- 2012
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Ingår i: Scandinavian Journal of Public Health. - : SAGE Publications. - 1651-1905 .- 1403-4948. ; 40:4, s. 340-347
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: In western countries out-of-hospital ischaemic heart disease (IHD) deaths account for approximately 50-70% of all IHD deaths. The objective was to examine the trends in out-of-hospital IHD deaths in the Region of Skåne in southern Sweden, in different sex- and age-groups. METHODS: All 14,347 persons (range 24-110 years) in Skåne who died out-of-hospital between 1992 and 2003 from IHD (I410-I414; I20-I25) as the underlying cause of death. Subjects with previous admission for IHD since 1970 were excluded. Data were retrieved from the Swedish National Cause of Death and Patient Register. Age-standardized IHD mortality rates and trends were calculated using Poisson regression analysis. RESULTS: Age-standardized annual out-of-hospital IHD mortality rates from 1992-2003 decreased in men from 177±13 to 103±9/100,000 inhabitants (-4.7%; p<0.001) and in women from 142±11 to 96±9/100,000 (-2.7%; p<0.001). In men, the annual change in age-standardized IHD mortality rates were -5.3 % (p<0.001), -4.0 % (p<0.001) and -4.7 % (p<0.001), respectively, in the age groups 20-64 years, 65-74 years and ≥75 years. Corresponding figures in women were -4.4 % (p<0.001), -2.4 % (p=0.003) and -2.5 % (p<0.001). The proportion of IHD deaths occurring out-of-hospital was in these age groups 50%, 40% and 35% respectively. CONCLUSIONS: In Skåne, out-of-hospital mortality in IHD deaths decreased significantly between 1992 and 2003. The decrease is more pronounced in men than women, and at the end of the study period in 2003, rates were almost equal. The proportion of IHD deaths occurring outside hospital was higher in younger people than in older people.
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| 47. |
- Gillberg, Gunnar, 1958, et al.
(författare)
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Social struktur och mänskligt handlande : En introduktion till kritisk realistisk samhällsanalys
- 2017
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Att förklara och förstå relationen mellan samhälle och individ är en av samhällsvetenskapens mest centrala uppgifter. Är individen styrd av de samhälleliga förhållanden som råder eller är det individen som styr sina egna livsvillkor? De flesta skulle förmodligen svara att detta i grunden är en fråga om ömsesidig påverkan. Hur denna ömsesidiga påverkan mer konkret ser ut och fungerar är emellertid en komplicerad fråga. Den här boken är en introduktion till den kritiska realismens ontologiska, kunskapsteoretiska och metodologiska perspektiv på detta.
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| 48. |
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| 49. |
- Hakvoort, Ilse, 1960, et al.
(författare)
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Conflict escalations in schools: manifestations and strategies
- 2024
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Ingår i: Presentation at NERA, Nordic Educational Research Association (NERA), Malmö University, 7 March 2024, Network: Value Issues and Social Relations in Education.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 50. |
- Hakvoort, Ilse, 1960, et al.
(författare)
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Escalated conflicts, threats, and violence against teachers from pupils in lower-secondary schools
- 2023
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Ingår i: Presentation at NERA, Nordic Educational Research Association, Norway, Oslo 15-17 March 2023, Network 7: Value Issues and Social Relations in Education.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Research topic/aim) Schools are among the workplaces with the greatest risk of exposure to violence. The aim of this three-year project (2022-2024) is twofold, that is to increase: 1. knowledge about escalating conflicts that contain threats and violence against lower-secondary schoolteachers from pupils. 2. knowledge about school organizations' efforts to support teachers and create safe work environments. The project has started January 2022 and the presentation will focus on the design of the project and discussion of earlier research. (Theoretical framework) Theoretically, the study has three points of departure. The first is the relational nature of the teaching profession. The profession includes responsibility for social and pedagogical relationships as well as teachers having the power to control, monitor and assess pupils, which contributes to asymmetry and possible frictions in the relationship. The second addresses threats and violence from the pupils as expressions of escalated conflicts. A third point of departure in the theoretical framework is an organizational perspective. Multiple institutional expectations and variations in conditions are anticipated to give space to understanding and managing the escalated conflicts in different ways. (Methodology/research design) The research questions will be answered by conducting a qualitative case study of four lower-secondary schools. The selection of schools is a careful process. We are choosing schools that are located in different structural contexts, have had substantial problems with threats and violence towards teachers from pupils but where the situation clearly has improved and the schools use a range of different measures to address the problem. The analysis will be based on the following empirical material for each schools: 1. qualitative individual interviews with principals, union representatives and municipal security officers; 2. focus group interviews with teachers; and 3. documents including legislation, regulations, and policies. The findings will be analysed in the light of existing research on conflict management, professions, and complex organizations. (Expected result) The project will contribute with knowledge on escalated conflicts, pupils’ threats and violence towards teachers, as well as structures, processes and measures influencing these phenomena. Furthermore, the different measures which the participating schools found effective to improve the teachers working environment will be presented and discussed.
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