| 1. |
- Sterner, Olov, et al.
(författare)
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Mutagens in larger fungi. I. Forty-eight species screened for mutagenic activity in the Salmonella/microsome assay
- 1982
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Ingår i: Mutation Research/Genetic Toxicology. - : Elsevier BV. - 0165-1218. ; 101:4, s. 269-281
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Tidskriftsartikel (refereegranskat)abstract
- Specimens of large fungi (mushrooms) were screened for mutagenic activity by the Salmonella/microsome assay, with strains TA98, TA2637 and TA100. Out of 48 species tested, 37 exhibited a significant but for the most part weak activity. The activity observed in the presence of S9 mix was typically between 0 and 50% of that without, and in no case was the activity increased in the presence of microsomal enzymes. Six metabolites reported to occur in some of the species included in this investigation were also tested. Significant mutagenic activity was found with isovelleral (5) from Lactarius sp., agaritine (3) from Agaricus bisporus and related sp. and β-nitraminoalanine (7) from Agaricus silvaticus. Isovelleral may be a major mutagen in some of the sharp-tasting and mutagenic Russulaceae sp. A. bisporus (cultivated specimen) was weakly mutagenic toward all three strains of S. typhimurium used, and agaritine was weakly active toward TA2637 alone. This implies that this fungus might contain other mutagenic material as well. β-Nitraminoalanine was not found in the particular collection of A. silvaticus tested here. The mutagenicity observed for the fungus in this work may therefore be due to other metabolites. Even though many species found to be mutagenic are used as food, it seems premature to make specific recommendations about eventual health risks. Further information is needed about the chemistry and toxicology of the active compounds as well as about the effects of various methods used in preparing mushrooms for food.
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| 2. |
- Stephansson, Ove, et al.
(författare)
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Nuclear power production in an underground chain
- 1984
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Ingår i: Rock mechanics. - Rotterdam : Balkema Publishers, A.A. / Taylor & Francis The Netherlands. - 9061912350 ; , s. 1193-1197
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Konferensbidrag (refereegranskat)
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| 3. |
- Åkesson, Bengt, 1932, et al.
(författare)
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Wp-cave - a new concept for underground high-level nuclear waste repository
- 1981
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Ingår i: Subsurface Space: Environmental Protection Low Cost Storage Energy Savings. ; , s. 791-800
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- © 1981 Pergamon Press Ltd Published by Elsevier Ltd All rights reserved. An almost spherical rock cavern is surrounded at some distance by a fairly thick clay barrier. Nuclear waste canisters are mounted in cylindrical holes traversing large concrete balls. These are stored in the cavern together with similar concrete balls (without canisters) filling up the entire cavern space. The clay barrier prevents ground water circulation for a very long time, enhances ion-exchange, and increases the repository resistance against future tectonic movements and earthquakes. Calculations of heat balance, thermal effects, clay barrier function and costs have been performed. One repository (Fig. 1) accommodates one year's unreprocessed waste from 12 nuclear 1000 MWe reactors assuming 10 years of interim storage. Construction operations are outlined. Various advantages of the concept are emphasized (see list at end of paper).
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