| 1. |
- Mineva, Milena, et al.
(författare)
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A New us Isomer in 136Sb Produced in the Projectile Fission of 238U
- 2001
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Ingår i: European Physical Journal A. Hadrons and Nuclei. - 1434-6001. ; 11, s. 9-13
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Tidskriftsartikel (refereegranskat)abstract
- The neutron-rich isotope Sb-136 has been produced following the relativistic projectile fission of U-238 in an experiment performed at the Fragment Separator at GSI, Darmstadt. Delayed gamma -ray spectroscopy of the fission products has been performed after isotope separation. A new isomeric state in Sb-136 has been populated, and its lifetime measured as T-1/2 = 565(50) ns. Realistic and empirical shell-model calculations have been performed and are compared to the experimental observables.
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| 2. |
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| 3. |
- Sandblad, Bengt, et al.
(författare)
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A train traffic operation and planning simulator
- 2000
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Ingår i: Computers in Railways VII. - : WITPress, Southampton. - 1853128260 ; , s. 241-248
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The objective of the project presented in this paper has been to develop a newsimulator system that can contribute to improved methods for train trafficplanning and operation and to create an experimental environment for developmentof new control support systems and operator user interfaces. The newsimulator system is based on a previously developed simulation kernel,SIMON/TTS, which has been used by the Swedish National Rail Administrationfor off line planning experiments. The SIMON/TTS system has now beenredesigned into an interactive, real-time simulator where external control andpresentation systems can be connected via a communication module. Thesimulator system will be used for different purposes. Some of the most importantexperimental scenarios are to perform experiment with new user interfaces fortrain traffic control operators, to test the usefulness of decision support systemsfor train dispatchers, to evaluate alternative strategies for solving conflicts intrain traffic control and to provide a simulator environment for education andtraining of train traffic operators.
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| 4. |
- Bertheim, Ulf, et al.
(författare)
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The stromal reaction in basal cell carcinomas : A prerequisite for tumour progression and treatment strategy
- 2004
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Ingår i: British Journal of Plastic Surgery. - : Elsevier BV. - 0007-1226 .- 1465-3087. ; 57:5, s. 429-439
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Tidskriftsartikel (refereegranskat)abstract
- Specimens of basal cell carcinomas collected from 28 patients were classified into three groups: superficial, nodular, and infiltrative, according to their microarchitecture. The specimens were then subjected to histological characterization by means of a biotinylated hyaluronan-binding probe (HABP). By using Ki-67 and PCNA the proliferative activity of the BCC tumours was evaluated with immunohistological techniques. In superficial BCC the tumour islands displayed moderate hyaluronan (HA) staining. Feeble proliferation, denoted by modest mitotic activity and weak Ki-67 and PCNA immunoreactivity, occurred within the tumour islands. The surrounding connective tissue resembled normal skin, and no differentiated tumour stroma was observed. In nodular BCC, the HA staining of the tumour strands was weak to moderate, denoting increased proliferative activity. The differentiated surrounding tumour stroma stained strongly for HA. Tumour islands of infiltrative BCC stained weakly to moderately to HA and evidenced intense proliferation. The intensely HA-stained tumour stroma ended abruptly and the adjacent areas were almost devoid of HA. This study showed that the proliferative activity of BCC cells is associated with increased expression of HA in the tumour stroma. Modification of tumour-associated connective tissue indicates a close relationship between the tumour cells and the adjacent matrix. In particular, in infiltrative BCC, such alterations include degeneration and possible modification and remodelling of the surrounding extracellular matrix. These processes involving areas of probable importance for tumour progression, should be considered when deciding the extent of intended surgical resection.
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| 5. |
- Ehrström, M, et al.
(författare)
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Pharmacokinetic profile of orexin A and effects on plasma insulin and glucagon in the rat
- 2004
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Ingår i: Regulatory Peptides. - : Elsevier BV. - 0167-0115 .- 1873-1686. ; 119:3, s. 209-212
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Tidskriftsartikel (refereegranskat)abstract
- Orexin A (OXA) is found in the central nervous system (CNS) and in the gut. Peripheral administration of OXA to rats results in an inhibition of fasting motility. Plasma OXA increases during fasting and central administration of OXA increases food intake. The aim of the present study was to assess the pharmacokinetic profile of OXA and the effect of intravenously (IV) administered OXA on plasma concentrations of insulin and glucagon concentrations. Rats were given OXA IV (100 pmol kg-1 min-1) for time periods of 0, 10, 20, 30 min and for 10, 20, 30 min after ceasing a 30-min infusion. After each time period, rats were then sacrificed and blood obtained. OXA was also administered at increasing doses (0, 100, 300 and 500 pmol kg-1 min-1) for 30 min and blood was obtained. Plasma OXA, insulin and glucagon levels were measured using commercially available radioimmunoassay (RIA) kits. The plasma half-life of OXA was 27.1±9.5 min. Stepwise increasing infusion rates of OXA confirmed a linear concentration-time curve and thus first-order kinetics. Its volume of distribution indicated no binding to peripheral tissues. Plasma glucagon decreased during infusion of OXA, while insulin was unaffected. Plasma OXA was raised fourfold after food intake. Thus, OXA has a longer plasma half-life than many other peptides found in the gut. This needs to be taken into account when assessing effects of OXA on biological parameters after peripheral administration.reserved.
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| 8. |
- Fischer, S, et al.
(författare)
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Collector test method under quasi dynamic conditions according to the European Standard EN 12975-2
- 2004
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Ingår i: Solar Energy. - : Elsevier BV. - 0038-092X. ; 76, s. 117-123
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Konferensbidrag (refereegranskat)abstract
- In April 2001 the new European Standard EN 12975:2000: ''Thermal solar systems and components--Solar Collectors'' was established. With the publication of this European standard all national standards, related to the same topic, have to be withdrawn by the nations of the European Community. Now only one standard for testing solar collectors is valid throughout Europe.This European Standard specifies test methods for validating the durability, reliability and safety requirements for liquid heating collectors. The standard also includes two alternative test methods for the thermal performance characterization for liquid heating collectors. Apart from the well-known test method under steady-state conditions according to ISO 9806-1, ISO 9806-3 and ASHRAE 93-77 the EN 12975 permits a quasi-dynamic test method for the thermal performance characterization of solar thermal collectors.This paper presents the improved approach to outdoor performance testing of solar thermal collectors under quasi-dynamic test conditions. The test requirements and collector theory are closely connected to those long agreed on for steady-state testing, as described in the ISO and ASHRAE standards mentioned above. The most important effects for the all day performance of the collector are taken into account. The test method covers most collector designs on the market today (except ICS type). Only some correction terms are added to the basic collector models of the present steady-state test methods. Still this limited change will allow test data to be collected and used from whole days.An important fact is that the collector model used for the parameter identification is written so that the error in collector output power is minimized. Therefore an accurate long-term prediction of the collector performance can be an integral part of the test method, where the same collector model and parameters are used for both testing and prediction.
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