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- Aldén, Marcus, et al.
(författare)
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Application of Cars Spectroscopy To the Detection of So2
- 1988
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Ingår i: Applied Spectroscopy. - : SAGE Publications. - 1943-3530 .- 0003-7028. ; 42:8, s. 1421-1427
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Tidskriftsartikel (refereegranskat)abstract
- Experiments have been performed to investigate the possibility of detecting low concentrations of SO2 using CARS spectroscopy. The experiments were also aimed at high-temperature investigations both in a heated cell and in a flame. During the cell measurements it was clearly revealed that the temperature has a dramatic influence on the shape of the CARS spectra, indicating a good potential for thermometry using SO2 and CARS spectroscopy.
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| 2. |
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| 3. |
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| 4. |
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| 5. |
- Fernell, Elisabeth, 1948, et al.
(författare)
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Ventriculoatrial or ventriculoperitoneal shunts in the treatment of hydrocephalus in children?
- 1985
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Ingår i: Zeitschrift für Kinderchirurgie. - : Georg Thieme Verlag KG. - 0174-3082. ; 40 Suppl 1, s. 12-14
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Tidskriftsartikel (refereegranskat)abstract
- The data on all 881 primary or revision shunt operations performed on 158 paediatric patients treated in Gothenburg, Sweden from 1967 to 1984 and 101 patients treated in Oulu, Finland from 1968 to 1983 were pooled for the purpose of comparative evaluation of the function of ventriculoatrial (VA) and ventriculoperitoneal (VP) shunts. Ventriculoperitoneal shunting was the method of choice in Gothenburg and ventriculoatrial shunting in Oulu. The results of the 723 operations (305 VA and 418 VP shunts) were evaluated as the other 158 operations were for ventriculostomas, shunt removals and other procedures. 80 children had exclusively VA shunts and 133 children had exclusively VP shunts. Irrespective of the method of analysis the VP shunts were more frequently infected. The estimated relative risk for obstruction of the shunt (Meyer-Kaplan method) was shown to be significantly higher in VA shunts, but only at a low level of statistical significance (p less than 0.1). All other shunt complications were distributed uniformly in both groups. There was, however, a trend towards a higher mortality among children with exclusively VA shunts. Therefore it was concluded that despite the higher risk for infection in VP shunts, these still should be considered a safer choice, as the complications of VA shunts present greater risks.
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| 6. |
- Wendt, W, et al.
(författare)
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Application of Emission and Absorption-spectroscopy For Characterization of A Copper Converting Process
- 1988
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Ingår i: Applied Spectroscopy. - : SAGE Publications. - 1943-3530 .- 0003-7028. ; 42:1, s. 128-133
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Tidskriftsartikel (refereegranskat)abstract
- The emission and absorption spectra of a copper converter flame have been investigated. It was found that the emission spectra consisted of Planck radiation and superimposed discrete structures. The band structure was dominated by PbS in the slag-making stage and by PbO in the copper-making stage. Towards the end of the slag-making stage the ratio of the PbO and PbS band intensities (PbO/PbS) changed, in good agreement with thermodynamical calculations. Absorption measurements were performed during the copper-making stage, where the absorption edge of SO2 at about 380 nm was the dominating feature. The implications of these measurements for process steering and control are discussed.
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