| 1. |
- Gustavsson, Karl-Erik, et al.
(författare)
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Different types of organic pop-up fertilizers in carrot cultivation: Effects on the concentrations of polyacetylenes and sugars
- 2018
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Ingår i: Scientia Horticulturae. - : Elsevier BV. - 0304-4238 .- 1879-1018. ; 230, s. 126-133
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Tidskriftsartikel (refereegranskat)abstract
- The effects on the concentration of falcarinol-type of polyacetylenes and sugars at harvest and after storage of carrots after application of different types (powder, digestate, two micro-granular) of organic pop-up fertilizer, where the fertilizer was placed in small amounts together with the seeds, were studied. Both groups of investigated compounds reflect important sensory attributes of the carrots, while polyacetylenes are considered as potentially health-promoting compounds. Results showed that the type of pop-up organic fertilizer as well as the dose can affect the concentrations of polyacetylenes and sugars. The dose of nitrogen applied did not seem to alone affect the concentration of polyacetylenes in carrots, while low amounts of applied phosphorus could be related to higher amounts of falcarindiol. The liquid digestate resulted in the highest concentrations of poly acetylenes in two of the treatments, even though the applied doses of digestate contained among the lowest amounts of nutrients. Storage resulted in both increases and decreases of total polyacetylenes, falcarindiol and falcarinol, while falcarindiol-3-acetate generally increased during storage. The sugars showed less variation due to the type or dose of fertilizer applied, as compared with the polyacetylenes.
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| 2. |
- Andersson, Staffan, et al.
(författare)
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Tocopherols in rose hips (Rosa spp.) during ripening
- 2012
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Ingår i: Journal of the Science of Food and Agriculture. - : Wiley. - 0022-5142 .- 1097-0010. ; 92, s. 2116-2121
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Rose hips are used as a food ingredient and in health products. They are rich in various bioactive compounds such as carotenoids and vitamin C, but data on their vitamin E content (tocopherols and tocotrienols) are limited. In this study, four different species ofRosa were analysed for tocopherol and tocotrienol content during ripening in three different years. RESULTS: Only a- and ?-tocopherol were found in the fleshy parts of the rose hips, and the tocopherol content and vitamin E activity varied depending on date of harvesting, species and year. The amount of vitamin E activity differed between species of Rosa and years, whereas the changes during ripening were relatively small. CONCLUSION: The choice of species must be considered if tocopherol content is to be optimised when rose hips are used as a food ingredient. Copyright (C) 2012 Society of Chemical Industry
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| 3. |
- Andersson Sundén, Erik, et al.
(författare)
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Citizen Science and Radioactivity
- 2019
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Ingår i: Nuclear Physics News. - : Informa UK Limited. - 1050-6896 .- 1061-9127 .- 1931-7336. ; 29:2, s. 25-28
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 4. |
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| 5. |
- Dam-Larsen, Sanne, et al.
(författare)
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Best practice in placement of percutaneous endoscopic gastrostomy with jejunal extension tube for continuous infusion of levodopa carbidopa intestinal gel in the treatment of selected patients with Parkinsons disease in the Nordic region
- 2015
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Ingår i: Scandinavian Journal of Gastroenterology. - : TAYLOR and FRANCIS LTD. - 0036-5521 .- 1502-7708. ; 50:12, s. 1500-1507
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Tidskriftsartikel (refereegranskat)abstract
- Objective. Continuous infusion of levodopa carbidopa intestinal gel (LCIG) is associated with a significant improvement in the symptoms and quality of life of selected patients with advanced Parkinsons disease. Percutaneous endoscopic gastrostomy with jejunal extension (PEG/J) was first described in 1998 and has become the most common and standard technique for fixing the tubing in place for LCIG infusion. Material and methods. A workshop was held in Stockholm, Sweden, to discuss the PEG/J placement for the delivery of LCIG in Parkinsons disease patients with the primary goal of providing guidance on best practice for the Nordic countries. Results. Suggested procedures for preparation of patients for PEG/J placement, aftercare, troubleshooting and redo-procedures for use in the Nordic region are described and discussed. Conclusions. LCIG treatment administered through PEG/J-tubes gives a significant increase in quality of life for selected patients with advanced Parkinsons disease. Although minor complications are common, serious complications are infrequent, and the tube insertion procedures have a good safety record. Further development of delivery systems and evaluation of approaches designed to reduce the demand for redo endoscopy are required.
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| 6. |
- Fällström, Karl-Evert, et al.
(författare)
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Transient bending waves in plates studied by hologram interferometry
- 1989
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Ingår i: Experimental mechanics. - 0014-4851 .- 1741-2765. ; 29:4, s. 378-387
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Tidskriftsartikel (refereegranskat)abstract
- Propagating bending waves are studied in plates made of aluminum and wood. The waves are generated by the impact of a ballistic pendulum. Hologram interferometry, with a double pulsed ruby laser as the light source, is used to record the out of plane motion of the waves. Elliptic-like fringes visualize differences in wave speed for different directions in the anisotropic plate and circular ones are obtained for the isotropic plate. The experimental data for the isotropic plate compare favorably with analytical results derived from the Kirchhoff-plate equation with a point impact of finite duration. A similarity variable is found when starting conditions are modeled as a Dirac pulse in space and time, that brings new understanding to the importance of specific parameters for wave propagation in plates. A formal solution is obtained for a point force with an arbitrary time dependence. For times much larger than the contact time, the plate deflection is shown to be identical to that from a Dirac pulse applied at the mean contact time. A method for determining material parameters, and the mean contact time, from the interferograms is hence developed.
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| 7. |
- Gustavsson, Cecilia, Dr, 1973-, et al.
(författare)
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Citizen science in radiation research
- 2020
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Ingår i: ND 2019. - : EDP Sciences. - 9782759891061
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Konferensbidrag (refereegranskat)abstract
- A growing trend in science is that research institutions reach out to members of the public for participating in research. The reasons for outreach are many, spanning from the desire to collect and/or analyse large sets of data efficiently, to the idea of including the general public on a very fundamental level in science-making and ultimately decision-making. The presented project is curriculum-based and carried out in 240 lower secondary school classes (pupils of age 13-16). The task, as designed by the participating universities, is to collect mushrooms, soil and animal droppings from different parts of Sweden, do preliminary sample preparation and analyses and send the samples to the university institutions for radioactivity measurement. Behind the project is a desire to compare today’s levels of 137Cs with those deposited right after the Chernobyl accident in 1986, but also to study the exchange of caesium between organisms as well as the impacts of biological and geological processes on uptake and retention. The scientific outcome is a geodatabase with the 137Cs activity (Bq/m2) present in the Swedish environment, where radioactivity data can be linked to the species (fungi, competing species, animals foraging), forest type, land type, land use and other environmental factors. The science question is of interest to the general public as foraging for mushrooms, as well as spending recreational time in forests is widely popular in Sweden. In this article, we will discuss the current status of the project and the observations we have made about how well the public can participate in scientific research. Focus will be on organization of the project, such as logistics, preparation of supportive material, feedback and communication between researchers and schools. We will present observations about the impact the project has had on the participants, based on quantitative and qualitative evaluations.
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| 8. |
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| 9. |
- Kjellenberg, Lars, et al.
(författare)
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Correlations between Polyacetylene Concentrations in Carrot (Daucus carota L.) and Various Soil Parameters
- 2016
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Ingår i: Foods. - : MDPI AG. - 2304-8158. ; 5
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Tidskriftsartikel (refereegranskat)abstract
- This study assessed the concentrations of three falcarinol-type polyacetylenes (falcarinol, falcarindiol, falcarindiol-3-acetate) in carrots and the correlations between these and different soil traits. A total of 144 carrot samples, from three different harvests taken a single season, were analysed in terms of their polyacetylene concentrations and root development. On one of the harvesting occasions, 48 soil samples were also taken and analysed. The chemical composition of the soil was found to influence the concentrations of falcarinol-type polyacetylenes in carrots. When the total soil potassium level was 200 mg/100 g soil, the concentration of falcarindiol (FaDOH) in the carrot samples was 630 μg/g DW, but when carrots were grown in soil with a total potassium level of 300 mg/100 g soil, the FaDOH concentration in the carrots fell to 445 μg/g DW. Carrots grown in soils generally low in available phosphorus exhibited higher levels of falcarindiol if the soil was also low in available magnesium and calcium. The concentrations of polyacetylenes in carrots were positively correlated with total soil phosphorus level, but negatively correlated with total soil potassium level. Of the three polyacetylenes analysed, FaDOH concentrations were influenced most by changes in soil chemical composition.
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| 10. |
- Kjellenberg, Lars, et al.
(författare)
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Effects of Harvesting Date and Storage on the Amounts of Polyacetylenes in Carrots, Daucus carota
- 2010
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Ingår i: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 58, s. 11703-11708
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Tidskriftsartikel (refereegranskat)abstract
- The amounts of three main polyacetylenes in carrots; falcarinol, falcarindiol, and falcarindiol-3-acetate, were determined by HPLC, during three seasons, in carrots harvested several times per season and at different locations in Sweden. The amounts of falcarindiol first decreased from a relatively high level and then increased later in the harvest season. The amounts of falcarindiol-3-acetate showed similar variations, whereas the amounts of falcarinol did not exhibit any significant variation during the harvest season. During storage the amount of polyacetylenes leveled off, increasing in samples initially low and decreasing in samples initially high in polyacetylenes. The amounts of all polyacetylenes varied significantly due to external factors and between stored and fresh samples. This variation opens up possibilities to achieve a chemical composition of polyacetylenes at harvest that minimizes the risk of bitter off-taste and maximizes the positive health effects reported in connection with polyacetylenes in carrots.
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