| 1. |
- Engström, Lars, et al.
(författare)
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Observation of an intensity anomaly in the 3s23p 2P1/2, 3/2-3s3p22S1/2 and 2P1/2 resonance transitions in the Al I isoelectronic sequence
- 1989
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Ingår i: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 39:1, s. 66-69
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Tidskriftsartikel (refereegranskat)abstract
- The intensity ratio of the two fine structure components in the 3s23p 2PJ–3s3p 2S1/2 and 2P1/2 resonance transitions has been measured in Al-like S IV, Cl V, Ar VI and Ti X, using the beam-foil technique. Unexpectedly large deviations from the LS ratios are found, particularly in the 2P–2S case. Although these deviations can be understood qualitatively from theoretical calculations (also reported), large quantitative discrepancies are observed in the beginning of the sequence.
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| 2. |
- Laurent, Torvald C., et al.
(författare)
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Urinary excretion of hyaluronan in man
- 1987
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Ingår i: Scandinavian Journal of Clinical and Laboratory Investigation. - 0036-5513 .- 1502-7686. ; 47:8, s. 793-799
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Tidskriftsartikel (refereegranskat)abstract
- A specific assay for hyaluronan (hyaluronic acid) has been applied to the determination of the polysaccharide in urine. The excretion in 22 healthy subjects was 330 micrograms/24 h (SD 77). The excretion was correlated with body weight and was therefore somewhat higher in males than in females. The molecular weight of the main fraction of urinary hyaluronan was in the range of 4000 to 12,000 in accordance with the hypothesis that it originates from blood and arises by glomerular filtration. A small fraction was of higher molecular weight and could have been produced in the urinary tract. Hyaluronan in male and female urine displayed the same molecular weight distributions. Patients with rheumatoid arthritis and primary biliary cirrhosis showed a two-fold and three-fold increase, respectively, of hyaluronan in urine with concurrently high levels of the polysaccharide in serum. A patient with Werner's syndrome displayed a ten-fold increase of the polysaccharide in both serum and urine.
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| 3. |
- Reistad, N., et al.
(författare)
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Lifetime of the 3s3p1p term in s v
- 1985
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Ingår i: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 32:3, s. 164-168
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Tidskriftsartikel (refereegranskat)abstract
- The lifetime of the 3s3p1P term in Mg-like S V has been determined by beam-foil spectroscopy in combination with detailed analyses of cascading processes by means of the ANDC technique. One of the most important cascade transitions was found to be seriously blended by a strong S VII transition. An earlier proposed method for appling the ANDC formalism to correct for blending has been tested for the first time and found to work very well. The resulting 3s3p1P lifetime of 0.19 ± 0.01 ns, corresponding to an absorption oscillator strength of 1.46 ± 0.08, is in good agreement with recent theoretical values. Some previously noted discrepancies between beam-foil measurements and theoretical calculations for Mg-like ions can now be explained as being due to insufficient cascade corrections in previous experimental work.
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| 4. |
- Westerlind, M., et al.
(författare)
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Lifetimes of 2p53p and 3d levels in Ne-like chlorine, Cl VIII
- 1988
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Ingår i: Nuclear Inst. and Methods in Physics Research, B. - 0168-583X. ; 31:1-2, s. 300-304
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Tidskriftsartikel (refereegranskat)abstract
- Experimental lifetimes of seven 2p53p and six 2p53d levels in Ne-like chlorine, Cl VIII, have been measured using the beam-foil technique. For the first time in the Ne-sequence, the ANDC method of cascade correction has been applied in the lifetime determination of the 3p levels. This procedure lowered the values by 10 to 30% compared to the results from multiexponential curve-fitting. For all levels studied, except 3p3D2 and 3D1, the experimental lifetimes are in good agreement with recent theoretical values. A comparison between experimental and theoretical lifetimes for some 3p and 3d levels along the isoelectronic sequence is presented.
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