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- Khuyagbaatar, J., et al.
(författare)
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Fission in the landscape of heaviest elements: Some recent examples
- 2016
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Ingår i: Nobel Symposium NS 160 – Chemistry and Physics of Heavy and Superheavy Elements. - : EDP Sciences. - 9782759890118 ; 131
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Konferensbidrag (refereegranskat)abstract
- The fission process still remains a main factor that determines the stability of the atomic nucleus of heaviest elements. Fission half-lives vary over a wide range, 10^−19 to 10^24 s. Present experimental techniques for the synthesis of the superheavy elements that usually measure α-decay chains are sensitive only in a limited range of half-lives, often 10^5 to 10^3 s. In the past years, measurement techniques for very short-lived and very long-lived nuclei were significantly improved at the gas-filled recoil separator TASCA at GSI Darmstadt. Recently, several experimental studies of fission-related phenomena have successfully been performed. In this paper, results on 254−256Rf and 266Lr are presented and corresponding factors for retarding the fission process are discussed.
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- Khuyagbaatar, J., et al.
(författare)
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New Short-Lived Isotope 221U and the Mass Surface Near N=126
- 2015
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Ingår i: Physical Review Letters. - 1079-7114. ; 115:24
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Tidskriftsartikel (refereegranskat)abstract
- Two short-lived isotopes 221U and 222U were produced as evaporation residues in the fusion reaction 50Ti+176Yb at the gas-filled recoil separator TASCA. An α decay with an energy of Eα=9.31(5) MeV and half-life T1/2=4.7(7) μs was attributed to 222U. The new isotope 221U was identified in α-decay chains starting with Eα=9.71(5) MeV and T1/2=0.66(14) μs leading to known daughters. Synthesis and detection of these unstable heavy nuclei and their descendants were achieved thanks to a fast data readout system. The evolution of the N=126 shell closure and its influence on the stability of uranium isotopes are discussed within the framework of α-decay reduced width.
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- Ohlsson, B., et al.
(författare)
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Dearterialization of colorectal liver cancer : Institutional experience
- 1999
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Ingår i: Digestive Surgery. - : S. Karger AG. - 0253-4886 .- 1421-9883. ; 16:3, s. 229-235
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Tidskriftsartikel (refereegranskat)abstract
- Background/Aims: Preliminary clinical trials have suggested that dearterialization (interruption of arterial blood supply) is beneficial to patients with liver tumours. The aim of this report was to review the outcome of all patients undergoing dearterialization for colorectal liver metastases and to analyze whether refinement of the technique was followed by improvement in outcome. Methods: Retrospective review of 57 patients undergoing temporary (16 h) dearterialization during 1972-1984 (n = 24) or repeated transient dearterialization (1-2 h once or twice daily) during 1985-1995 (n = 33). Results: The median survival after start of treatment was 1.1 years, and the 5-year survival rate was 0%. There was no significant difference in survival between temporary and repeated transient dearterialization. Liver tumour volume and extrahepatic metastases varied negatively with survival. The temporary dearterialization procedure was followed by hepatic or intra-abdominal abscess formation in 6 patients (24%), leading to postoperative death in 2 patients (operative mortality 8%). Complications after repeated transient dearterialization were related mainly to technical problems with the occluder device. Conclusion: Although this was not a randomized study, it appears that dearterialization is of no benefit in colorectal liver cancer.
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- Bengmark, S., et al.
(författare)
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NEUESTER STAND DER LEBERCHIRURGIE
- 1982
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Ingår i: Zentralblatt fur Chirurgie. - 0044-409X. ; 107:12, s. 689-696
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Tidskriftsartikel (refereegranskat)
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- Bergendorff, O., et al.
(författare)
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Screening of some European medicinal plants for spasmolytic activity on isolated guinea-pig trachea
- 1995
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Ingår i: International Journal of Pharmacognosy. - 0925-1618. ; 33:4, s. 356-358
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Tidskriftsartikel (refereegranskat)abstract
- Eight European plants, used traditionally against diseases of the respiratory system, have been assayed for in vitro spasmolytic activity on guinea-pig trachea. The plants were collected or cultivated in the south of Sweden, and both water and 67% methanol extracts of the parts reported to be used in the traditional medicine were prepared and assayed. Five of the species did not show any significant activity at concentrations up to 0.6 mg extract per ml organ bath, the methanol extracts of 2 species (Glechoma hederacea and Hyssopus officinale) showed weak activity, while 0.6 mg/ml of the methanol extract of the aerial parts of Artemisia abrotanum relaxed the tone induced by 0.1 μmol/l carbachol almost (80%) as effectively as 2.2 mmol/l terbutaline.
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- Nygren, L, et al.
(författare)
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T-cell levels are prognostic in mantle cell lymphoma
- 2014
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Ingår i: Clinical cancer research : an official journal of the American Association for Cancer Research. - 1557-3265. ; 20:23, s. 6096-6104
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Tidskriftsartikel (refereegranskat)
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- Roos, H., et al.
(författare)
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Re-interventions after endovascular aortic repair for infrarenal abdominal aneurysms: a retrospective cohort study
- 2016
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Ingår i: Bmc Cardiovascular Disorders. - : Springer Science and Business Media LLC. - 1471-2261. ; 16
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Tidskriftsartikel (refereegranskat)abstract
- Background: Early morbidity and mortality are generally lower after endovascular aortic repair (EVAR), than after open repair but re-interventions and late complications are more common. The aim of the present study was to make a detailed description of re-interventions after EVAR-including incidence, indications, procedures, and outcome-with special reference to non-access-related re-interventions. Methods: This is a retrospective single-center cohort study of re-interventions after standard EVAR with special reference to non-access-related re-interventions. Consecutive patients (n = 405) treated with standard EVAR for non-ruptured (n = 337) or ruptured (n = 68) infrarenal aneurysms between 2005 and 2013 were analysed. Median follow-up was 29 months (range 0-108). Results: Eighty-nine patients (22 %) underwent 113 re-interventions during follow-up. Twenty-seven patients (7 %) had 28 access related re-intervention, 65 patients (16 %) had 85 non-access related reinterventions. Non-access related re-interventions were more common in ruptured aneurysms than in unruptured aneurysms (22 vs. 15 %, p = 0.002). The most frequent indications were endoleak type I (n = 19), type II (n = 21), or type III (n = 5); stent graft migration (n = 9); and thrombosis (n = 14). The most frequent procedures were embolization of endoleak type II (n = 21), additional iliac stent graft (n = 19), proximal extension (n = 12), thrombolysis (n = 8), iliac limb bare-metal stenting (n = 6), and stent graft relining (n = 7). Endovascular technique was used in 83 % of re-interventions. Thirty-day mortality after non-access-related re-interventions was 15 % when initiated from symptoms (rupture or infection) and 0 % when initiated from follow-up findings (p = 0.014). Cumulative survival five years after EVAR was 72 % in patients with a re-intervention and 59 % in patients without (p = 0.21). Conclusions: Non-access-related re-intervention rates are still considerable after EVAR and more frequent after ruptured aneurysms. Endoleak embolization is the most frequent procedure, followed by additional iliac stent grafts. Outcomes after re-interventions are generally good, except when initiated by rupture or infection.
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- Ahrné, Siv, et al.
(författare)
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The normal Lactobacillus flora of healthy human rectal and oral mucosa.
- 1998
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Ingår i: Journal of applied microbiology. - 1364-5072. ; 85:1, s. 88-94
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Tidskriftsartikel (refereegranskat)abstract
- The Lactobacillus flora of the rectal and oral mucosa was sampled from 42 healthy volunteers. Species identification was carried out by numerically comparing API 50CH fermentation patterns with type strains, using an SJ-similarity cut-off level of 79%. For the largest groups, identity was further confirmed by DNA-DNA hybridizations against the type strain of the species. Seventeen lactobacilli clusters were defined, of which most were found both on rectal and oral mucosa. The largest taxa were Lactobacillus plantarum, Lact. rhamnosus and Lact. paracasei ssp. paracasei, which were isolated from 52%, 26% and 17% of the individuals, respectively. Most isolates were tested for their capacity to adhere to the human colonic cell line HT-29 in the absence and presence of methyl-alpha-D-mannoside. Mannose-sensitive adherence to HT-29 cells was encountered in two-thirds of the Lact. plantarum isolates, but infrequently among isolates of other taxa. The results suggest that Lact. plantarum is a major colonizer of the human gastrointestinal mucosa, and that its capacity to adhere to mannose-containing receptors may be of some ecological importance.
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