| 1. |
- Doeleman, S., et al.
(författare)
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86 GHz Global VLBI Progress Report
- 1993
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Ingår i: VLBI Technology. - Tokyo : Terrapub. - 4887041128 ; , s. 89-92
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Bokkapitel (refereegranskat)
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| 2. |
- Sjödin, P, et al.
(författare)
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Effect of dietary fiber on the disposition and excretion of a food carcinogen (2-14C-labeled MeIQx) in rats
- 1992
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Ingår i: Nutrition and Cancer. - : Informa UK Limited. - 0163-5581 .- 1532-7914. ; 17:2, s. 139-151
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Tidskriftsartikel (refereegranskat)abstract
- We studied to what extent dietary fiber may affect uptake, retention, and excretion of a food carcinogen (2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline, MeIQx) occurring in fried meat. Four diets--one fiber-free control and three containing either insoluble dietary fiber isolated from sorghum (100 g/kg) and wheat bran (100 g/kg) or the highly soluble pectin (50 g/kg)--were investigated. The fiber diets were given in amounts of 10 g/day to rats. Thus, each rat received 1 or 0.5 g fiber and 100 micrograms 2-14C-labeled MeIQx uniformly mixed in its daily diet. A 4-day adaptation period with unlabeled MeIQx was followed by a 5-day experimental period with 14C-labeled MeIQx, during which urine and feces were collected separately for analysis of radioactivity and mutagenicity. Furthermore the composition and the fermentability of the dietary fiber were determined. The present study shows that a diet containing fiber, especially fiber isolated from sorghum and wheat bran, affects the excretion pattern of the food carcinogen MeIQx in a manner suggesting a lower uptake and a decreased transit time through the gastrointestinal tract in a more diluted form than a nonfiber diet. Furthermore, less radioactivity was retained in the kidneys with sorghum and wheat bran than with the other two diets. On the other hand, none of these types of dietary fiber affected the retention of the hepatocarcinogen MeIQx in the liver 24 hours after the last oral intake. DNA adducts were formed to a higher extent in the kidney than in the liver. The highest levels were found in animals given the wheat bran diet.
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| 3. |
- Tengblad, O., et al.
(författare)
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Study of Neutron Rich Neon Isotopes
- 1992
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Ingår i: Zeitschrift fur Physik A Hadrons and Nuclei. - 1431-5831 .- 0939-7922. ; 342:3, s. 303-307
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Tidskriftsartikel (refereegranskat)abstract
- The half-lives and P(n)-values of the neutron rich isotopes Ne-26-29 have been determined. The results are compared to shell-model calculations and good agreement is found except for Ne-29, where the half-life exceeds the predictions by more than an order of magnitude. This unexpectedly long half-life can be explained as due to a fp intruder configuration.
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| 4. |
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| 5. |
- Borge, M. J. G., et al.
(författare)
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Study of Charged-Particles Emitted in the Beta-Decay of He-6,He-8
- 1993
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Ingår i: Nuclear Physics A. - 0375-9474. ; 560:2, s. 664-676
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Tidskriftsartikel (refereegranskat)abstract
- The beta-delayed charged particle spectra from He-6 and He-8 were measured with a telescope consisting of a gas counter and a Si surface barrier detector. Beta-delayed deuterons and tritons are emitted in the two cases with branching ratios of (7.6 +/- 0.6) x 10(-6), E(d) > 350 keV and (8.0 +/- 0.5) x 10(-3), respectively. Both spectra present anomalies that must be due to the special structure of these nuclei (an alpha core surrounded by several neutrons).
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| 6. |
- Borge, M. J. G., et al.
(författare)
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Super-Allowed Beta-Decay of Nuclei at the Drip-Line
- 1991
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Ingår i: Zeitschrift fur Physik A Hadrons and Nuclei. - 1431-5831 .- 0939-7922. ; 340:3, s. 255-261
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Tidskriftsartikel (refereegranskat)abstract
- We have investigated the continuous particle spectra following the beta decay of the neutron-rich nuclei that terminate the mass 6, 8, 9 and 11 isobaric chains. Strong beta transitions feeding the very top of the spectrum are found systematically. The favoured states are within a few MeV of the energy of the initial state. This phenomenon seems to be linked to the occurrence of a di-neutron structure or neutron halo in the drip-line nuclei.
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| 7. |
- Borge, M. J. G., et al.
(författare)
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The Decay of Ar-31
- 1990
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Ingår i: Nuclear Physics A. - 0375-9474. ; 515:1, s. 21-30
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Tidskriftsartikel (refereegranskat)
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| 8. |
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| 9. |
- Riisager, K., et al.
(författare)
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1st Observation of Beta-Delayed Deuteron Emission
- 1990
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Ingår i: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 235:1-2, s. 30-34
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Tidskriftsartikel (refereegranskat)
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| 10. |
- Udén, P, et al.
(författare)
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Preoperative localization in unilateral parathyroid surgery. A cost-benefit study on ultrasound, computed tomography and scintigraphy
- 1990
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Ingår i: Acta Chirurgica Scandinavica. - 0001-5482. ; 156:1, s. 29-35
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Tidskriftsartikel (refereegranskat)abstract
- In 50 patients with primary hyperparathyroidism, investigation before initial neck exploration included ultrasonography, computed tomography and 99technetium-201thallium subtraction scintigraphy. The sensitivity for correct preoperative localization was 50%, 54% and 56%, respectively. There was marked inter-observer variation in assessment of ultrasonography and computed tomography, while scintigrams were evaluated by only one person. The scintigraphic sensitivity increased with size of the glands. In cases where correct preoperative localization permitted unilateral parathyroidectomy, the time for surgery and anesthesia was significantly reduced. A cost-benefit analysis, however, revealed that the financial saving from this time reduction was outweighed by the cost of the localization procedures. The authors conclude that investigations for definition of enlarged parathyroid glands are not indicated prior to unilateral parathyroidectomy.
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