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- Thisted Lambertz, Susanne, et al.
(författare)
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A comparison between a PCR method and a conventional culture method for detecting pathogenic Yersinia enterocolitica in food
- 1996
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Ingår i: Journal of Applied Bacteriology. - : Blackwell Publishing. - 0021-8847. ; 81:3, s. 303-308
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to develop a polymerase chain reaction (PCR) method for the detection of pathogenic Yersinia enterocolitica and to compare it with an official culture method (NMKL-117). Primers were selected for nested PCR directed at the attachment invasion locus, ail, on the bacterial chromosome, as well as at a sequence on the pathogenic marker plasmid, termed virulence factor, virF. The final results obtained by the two methods were similar. However, while the conventional method yielded contradictory data for some steps the PCR method provided unambiguous results. Considerable advantages, i.e. higher sensitivity and specificity of the PCR method, compared with the conventional method for detecting pathogenic Y. enterocolitica, were demonstrated in this study.
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- Yamauchi, M, et al.
(författare)
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Dynamic response of the cusp morphology to the solar wind : A case study during passage of the solar wind plasma cloud on February 21, 1994
- 1996
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Ingår i: Journal of Geophysical Research. - 0148-0227 .- 2156-2202. ; 101:A11, s. 24675-24687
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Tidskriftsartikel (refereegranskat)abstract
- On February 21, 1994, both Geotail and LMP 8 satellites detected an interplanetary plasma cloud with intense interplanetary magnetic field (IMF>50 nT) and high dynamic pressure (> 50 nPa). During this interval the Freja satellite detected intense cusp-like plasma injections in four out of six dayside traversals. The first two traversals are carefully studied, During the first traversal the overall morphology of the ion injection is characterized by a ''multiple-injection'' signature over a wide magnetic local time (MLT) range, whereas it is characterized by a ''single-injection'' signature with narrow injection region at 8 MLT in the second traversal, The solar wind conditions were also quite different between these two periods: while both dynamic and magnetic pressures stayed high during entire period, the dynamic beta was much higher during the first Freja traversal than during the second traversal. Between these two traversals, the cusp plasma injection is detected by the Sondre Stromfjord radar. The radar signature of the plasma injection is identified using the satellite particle data when the satellite and the radar were conjugate (the satellite's footprint was in the radar's field of view.) The cusp position and dynamics observed by the Sondre Stromfjord radar again show a very good correlation to the solar wind condition, especially to the dynamic pressure. The result indicates the following. (1) During southward IMF the cusp morphology differs for conditions of high or low solar wind dynamic pressure. High dynamic pressure widens the cusp (with multiple injections), whereas high magnetic pressure narrows it (with single injection), The effect of the IMF on the cusp locations and morphology becomes dominant only when the dynamic pressure is not very high, (2) Such a morphological difference reflects dynamic pressure more than dynamic beta during southward IMF at least during times of high solar wind dynamic pressure. (3) The cusp morphology responds very quickly to the changes in the solar wind conditions.
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- Zingmark, Karin, et al.
(författare)
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The experience of being at home throughout the life span. Investigation of persons aged from 2 to 102
- 1995
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Ingår i: The International Journal of Aging & Human Development. - 0091-4150 .- 1541-3535. ; 41:1, s. 47-62
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Tidskriftsartikel (refereegranskat)abstract
- One hundred and fifty persons aged two to 102 narrated their experiences related to the phenomenon 'being at home.' Several common interdependent and interrelated aspects of the experience of being at home were identified throughout the life span. These aspects are believed to entail cognitive, emotional, and conative dimensions of the experience: safety, rootedness, harmony, joy, privacy, togetherness, recognition, order, control, possession, nourishment, initiative, power, freedom. The sense of being related was found to be a common condition of the experience of being at home, i.e., related to significant others, significant things, significant places, significant activities, oneself, and transcendence. In the process of maintaining the experience of being at home throughout life the phenomena 'being given a home,' 'creating a home,' 'sharing a home,' and 'offering a home' were integral parts. A progression in the experience of being at home throughout the life span was identified.
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