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- Askebjer, P., et al.
(author)
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UV and optical light transmission properties in deep ice at the South Pole
- 1997
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In: Geophysical Research Letters. - : American Geophysical Union (AGU). - 0094-8276 .- 1944-8007. ; 24:11, s. 1355-1358
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Journal article (peer-reviewed)abstract
- Both absorption and scattering of light at wavelengths 410 to 610 nanometers were measured in the South Pole ice at depths 0.8 to 1 kilometer with the laser calibration system of the Antarctic Muon And Neutrino Detector Array (AMANDA). At the shortest wavelengths the absorption lengths exceeded 200 meters - an order of magnitude longer than has been reported for laboratory ice. The absorption shows a strong wavelength dependence while the scattering length is found to be independent of the wavelength, consistent with the hypothesis of a residual density of air bubbles in the ice. The observed linear decrease of the inverse scattering length with depth is compatible with an earlier measurement by the AMANDA collaboration (at ∼515 nanometers).
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- Englund, A, et al.
(author)
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Trafiksäkerhet. En kunskapsöversikt. [Traffic safety: A review]
- 1998
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Book (other academic/artistic)abstract
- The book was written on the initiative of The Swedish Transport & Communications Research Board to describe the state of art within transportation research. This textbook addresses students and professionals within the field of traffic safety. Five resear
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- ERICSSON, CH, et al.
(author)
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Repeatability of airway deposition and tracheobronchial clearance rate over three days in chronic bronchitis
- 1995
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In: The European respiratory journal. - : European Respiratory Society (ERS). - 0903-1936 .- 1399-3003. ; 8:11, s. 1886-1893
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Journal article (peer-reviewed)abstract
- Previous investigations on tracheobronchial clearance in chronic bronchitis or chronic obstructive pulmonary disease (COPD) have usually referred to measurements during a short time-period, i.e. a few hours. The purpose of this study, therefore, was to study regional particle deposition and tracheobronchial clearance during 72 h. In 14 patients with chronic bronchitis clearance of 111In-labelled 3.6 micrograms Teflon particles and lung function were measured on two occasions, with an interval of 2 weeks. Lung retention of test particles was measured at 0, 24, 48 and 72 h using a profile scanner. The weight of expectorated sputum samples was measured after the two clearance measurements. The particle retentions at all time-points were reproducible, as seen from the two measurements ( r > 0.90). The fast clearance phase was completed within 72 h. No correlation between sputum volume and clearance was seen. There was a significant negative correlation between airway resistance and the 72 h retention (r= -0.66), and an even better correlation between specific airway resistance and the 72 h retention (r = -0.82), indicating more central deposition in obstructed airways. There was no significant correlation between lung function tests reflecting smaller airways and the 72 h retentions. Deposition data agreed well with theoretical calculations and experimental data in healthy subjects. In spite of earlier findings that mucociliary transport is usually severely impaired in chronic bronchitis and COPD, the present results indicate that overall tracheobronchial mucus clearance in these patients is fairly effective, probably due to a productive cough. Alveolar deposition may be estimated by measurements of the 72 h retention in subjects with chronic obstructive pulmonary disease. The 72 h retention is dependent mainly on the calibre of larger airways. The present method of studying airway clearance during 3 days is highly reproducible.
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- Ericsson, H., et al.
(author)
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Division into five groups by REA of the most frequently isolated phagovar of Listeria monocytogenes in Sweden 1976–1985
- 1996
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In: Medical Microbiology Letters. - : Birkhäuser Verlag. - 1018-4627. ; 5:3, s. 145-155
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Journal article (peer-reviewed)abstract
- One hundred and seven strains of Listeria monocytogenes isolated from human cases of listeriosis in Sweden during 1976-1985 were investigated. Sero- and phagetyping showed that 74 strains (69%) belonged to serovar 4b and that 47 of these strains also shared phagovar 2389:2425:3274:2671:47:108:340. Strains sharing this phagovar were further analyzed by REA, and could accordingly be arranged into five REA groups. However, the majority of the 47 strains were distributed in two of the groups. This indicates that two clones of L. monocytogenes were responsible for a major part of the human cases of listeriosis in Sweden during the ten-year period studied.
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