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- Buchanan, E. M., et al.
(författare)
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The Psychological Science Accelerator's COVID-19 rapid-response dataset
- 2023
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Ingår i: Scientific Data. - : Springer Science and Business Media LLC. - 2052-4463. ; 10:1
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Tidskriftsartikel (refereegranskat)abstract
- In response to the COVID-19 pandemic, the Psychological Science Accelerator coordinated three large-scale psychological studies to examine the effects of loss-gain framing, cognitive reappraisals, and autonomy framing manipulations on behavioral intentions and affective measures. The data collected (April to October 2020) included specific measures for each experimental study, a general questionnaire examining health prevention behaviors and COVID-19 experience, geographical and cultural context characterization, and demographic information for each participant. Each participant started the study with the same general questions and then was randomized to complete either one longer experiment or two shorter experiments. Data were provided by 73,223 participants with varying completion rates. Participants completed the survey from 111 geopolitical regions in 44 unique languages/dialects. The anonymized dataset described here is provided in both raw and processed formats to facilitate re-use and further analyses. The dataset offers secondary analytic opportunities to explore coping, framing, and self-determination across a diverse, global sample obtained at the onset of the COVID-19 pandemic, which can be merged with other time-sampled or geographic data.
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- Janák, K, et al.
(författare)
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Enantiomer-specific accumulation of hexabromocyclododecanes in eggs of predatory birds
- 2008
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Ingår i: Chemosphere. - : Elsevier BV. - 0045-6535. ; 73:1, Supplement 1
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Tidskriftsartikel (refereegranskat)abstract
- The diastereomeric composition of hexabromocyclododecane (HBCD) in eggs of peregrine falcon (Falco peregrinus), white-tailed sea eagle (Haliaeetus albicilla), guillemot (Uria aalge) and common tern (Sterna hirundo) as well as the guillemots’ main prey, herring (Clupea harengus) was determined by reversed-phase chromatography with triple-stage quadrupole mass spectrometric detection (LC–MS–MS). α-HBCD was the predominant diastereomer in all bird species, while in herring, γ-HBCD made a substantial contribution. Two, as yet unidentified diastereomers, were detected in common tern egg. The α-, β- and γ-HBCD (+) and (−) enantiomers were separated using a chiral stationary phase. The enantiomer fractions for α-HBCD differed substantially between different bird species as well as between guillemot and its prey, herring. Total HBCD levels determined by LC–MS–MS were comparable to those previously obtained by GC–MS.
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- Janak, M., et al.
(författare)
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Ultrahigh-pressure metamorphism and exhumation of garnet peridotite in Pohorje, Eastern Alps
- 2006
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Ingår i: Journal of Metamorphic Geology. - : Wiley. - 0263-4929 .- 1525-1314. ; 24:1, s. 19-31
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Tidskriftsartikel (refereegranskat)abstract
- New evidence for ultrahigh-pressure metamorphism (UHPM) in the Eastern Alps is reported from garnet-bearing ultramafic rocks from the Pohorje Mountains in Slovenia. The garnet peridotites are closely associated with UHP kyanite eclogites. These rocks belong to the Lower Central Austroalpine basement unit of the Eastern Alps, exposed in the proximity of the Periadriatic fault. Ultramafic rocks have experienced a complex metamorphic history. On the basis of petrochemical data, garnet peridotites could have been derived from depleted mantle rocks that were subsequently metasomatized by melts and/or fluids either in the plagioclase-peridotite or the spinel-peridotite field. At least four stages of recrystallization have been identified in the garnet peridotites based on an analysis of reaction textures and mineral compositions. Stage I was most probably a spinel peridotite stage, as inferred from the presence of chromian spinel and aluminous pyroxenes. Stage II is a UHPM stage defined by the assemblage garnet + olivine + low-Al orthopyroxene + clinopyroxene + Cr-spinel. Garnet formed as exsolutions from clinopyroxene, coronas around Cr-spinel, and porphyroblasts. Stage III is a decompression stage, manifested by the formation of kelyphitic rims of high-Al orthopyroxene, aluminous spinel, diopside and pargasitic hornblende replacing garnet. Stage IV is represented by the formation of tremolitic amphibole, chlorite, serpentine and talc. Geothermobarometric calculations using (i) garnet-olivine and garnet-orthopyroxene Fe-Mg exchange thermometers and (ii) the Al-in-orthopyroxene barometer indicate that the peak of metamorphism (stage II) occurred at conditions of around 900 degrees C and 4 GPa. These results suggest that garnet peridotites in the Pohorje Mountains experienced UHPM during the Cretaceous orogeny. We propose that UHPM resulted from deep subduction of continental crust, which incorporated mantle peridotites from the upper plate, in an intracontinental subduction zone. Sinking of the overlying mantle and lower crustal wedge into the asthenosphere (slab extraction) caused the main stage of unroofing of the UHP rocks during the Upper Cretaceous. Final exhumation was achieved by Miocene extensional core complex formation.
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- Klonowska, Iwona, et al.
(författare)
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Eclogite and garnet pyroxenite from Stor Jougdan, Seve Nappe Complex, Sweden : implications for UHP metamorphism of allochthons in the Scandinavian Caledonides
- 2016
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Ingår i: Journal of Methamorphic Geology. - : Wiley. - 0263-4929. ; 34:2, s. 103-119
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Tidskriftsartikel (refereegranskat)abstract
- Ultrahigh-pressure metamorphism (UHPM) has recently been discovered in far-travelled allochthons of the Scandinavian Caledonides, including finding of diamond in the Seve Nappe Complex. This UHPM of Late Ordovician age is older and less recognized than that in the Western Gneiss Region of southwestern Norway, which was related to terminal collision between Baltica and Laurentia. Here we report new evidence of UHPM in the Lower Seve Nappe, recorded by eclogite and garnet pyroxenite from the area of Stor Jougdan in northern Jämtland, central Sweden. Peak-metamorphic assemblage of eclogite, garnet + omphacite + phengite + rutile + coesite? yields P–Tconditions of 2.8–4.0 GPa and 750–900 °C, constrained by conventional geothermobarometry and thermodynamic modelling in the NCKFMTASH system. The prograde metamorphic evolution of the eclogite is inferred from inclusions of zoisite and amphibole in garnet, which are stable at lower pressure, whereas the retrograde evolution is recorded by formation of diopsidic clinopyroxene + plagioclase symplectites after omphacite, growth of amphibole replacing these symplectites, and of titanite around rutile. In garnet pyroxenite the peak-metamorphic assemblage consists of garnet + orthopyroxene + clinopyroxene + olivine. P–T conditions of 2.3–3.8 GPa and 810–960 °C have been derived based on the conventional geothermobarometry and thermodynamic modelling in the CFMASH and CFMAS systems. Retrograde evolution has been recognized from replacement of pyroxene and garnet by amphibole. The results show that eclogite was metamorphosed during deep subduction of continental crust, most probably derived from the continental margin of Baltica, whereas the origin and tectonic setting of the garnet pyroxenite is ambiguous. The studied pyroxenite/peridotite of Baltican subcontinental affinity could have been metamorphosed as a part of the subducting plate and exhumed due to the downward extraction of a forearc lithospheric block.
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- Kodikara, Chamali, et al.
(författare)
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Comparison of nutritional and trace element concentrations in some Sri Lankan traditional rice varieties
- 2023
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Ingår i: International journal of food science & technology. - : John Wiley & Sons. - 0950-5423 .- 1365-2621. ; 58:10, s. 5168-5182
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Tidskriftsartikel (refereegranskat)abstract
- Recently, traditional rice cultivars have become more popular than new, enhanced rice varieties, with the main focus being on their health benefits. Few rice cultivars have been thoroughly studied to understand their nutritional and health benefits. Inductively coupled plasma atomic emission/mass spectroscopy methods were used to determine the concentrations of 24 key nutrients and trace elements in 104 traditional rice types (Oryza sativa L.) grown in Sri Lanka. Compared to the Codex Alimentarius provisional tolerable daily intake for 24 different elements, the concentrations of toxic elements such as As, Cd, Pb and Cr were significantly lower (P < 0.05), and most of the nutritional elemental concentrations were substantially higher (P < 0.05) in evaluated traditional rice varieties. Furthermore, Pb, Bi, B, K, Mg, S, Zn and Fe concentrations among traditional rice varieties were not substantially different (P > 0.05). Notably, several traditional rice varieties (i.e. Rathu Heenati, Pragathi Wee, Weda Heenati, etc.) contained significantly high levels of selenium (& AP;250 & mu;g L-1 DM, P < 0.05), an important trace element that is deficient in the diets of 1 billion people globally.
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- Petrik, I, et al.
(författare)
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Monazite Behaviour during Metamorphic Evolution of a Diamond-bearing Gneiss : a Case Study from the Seve Nappe Complex, Scandinavian Caledonides
- 2019
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Ingår i: Journal of Petrology. - : OXFORD UNIV PRESS. - 0022-3530 .- 1460-2415. ; 60:9, s. 1773-1796
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Tidskriftsartikel (refereegranskat)abstract
- Monazite is a common mineral in metapelitic rocks including those that underwent ultrahigh-pressure (UHP) metamorphism. During metamorphic evolution monazite adapts its composition to the changing mineral assemblage, especially in its heavy rare earth element contents. We studied this process in diamond-bearing gneiss containing monazite, from Saxnas in the Seve Nappe Complex of the Scandinavian Caledonides. Although the rock has been re-equilibrated under granulite-facies and partial melting conditions, it still preserves minerals from the UHP stage: garnet, kyanite, rutile, and especially diamond. Microdiamonds occur in situ as inclusions in garnet, kyanite and zircon, either as single crystals or as polyphase inclusions with Fe-Mg carbonates, rutile and CO2. Both monazite and diamond occur in the rims of garnet showing the highest pyrope content and a secondary peak of yttrium. Such a position indicates thermally activated diffusion under high temperature at the end of prograde metamorphism. Monazite compositions show negative Eu anomalies, which we interpret to be inherited from the source rock, not reflecting the coexistence with plagioclase and/or K-feldspar, which are unstable at UHP conditions. Our results suggest that the effect of whole-rock composition may be more important than that of coexisting phases. The UHP monazite was most probably formed from allanite during subduction and prograde metamorphism. The monazites included in garnet and kyanite are mostly unaltered, whereas those in the matrix show breakdown coronas consisting of apatite, REE-epidote/allanite and REE-carbonate, probably formed as a result of pressure decrease and cooling. U-Th-Pb chemical age dating of monazites yields an isochron centroid age of 472 +/- 3 Ma. We interpret this age as monazite growth under UHP conditions related to subduction of the Baltica continental margin in Early Ordovician time.
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