SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "LAR1:miun ;pers:(Hedenström Erik)"

Sökning: LAR1:miun > Hedenström Erik

Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  •  
2.
  •  
3.
  • Anderbrant, Olle, et al. (författare)
  • Field Response of Male Pine Sawflies, Neodiprion sertifer (Diprionidae), to Sex Pheromone Analogs in Japan and Sweden.
  • 2010
  • Ingår i: Journal of Chemical Ecology. - Springer. - 1573-1561. ; 36, s. 969-977
  • Tidskriftsartikel (refereegranskat)abstract
    • The pine sawfly Neodiprion sertifer (Geoffroy) uses the acetate or propionate of (2S,3S,7S)-3,7-dimethyl-2-pentadecanol (diprionol) as pheromone components, with the (2S,3R,7R)-isomer being antagonistic, synergistic, or inactive according to the population tested. In this study, we tested the attraction of males to the acetates of three analogs of diprionol, each missing one methyl group, viz. (2S,7S)-7-methyl-2-pentadecanol, (2S,6S)-2,6-dimethyl-1-tetradecanol, and (2S,3S)-3-methyl-2-pentadecanol. None of the analogs alone, or in combination with diprionol acetate, was attractive in Sweden, even at 100 times the amount of diprionol acetate attractive to N. sertifer. In Japan, the acetate of (2S,3S)-3-methyl-2-pentadecanol attracted males when tested in amounts 10-20 times higher than the acetate pheromone component. The acetate esters of the (2S,3R)-analog and the (2S,3R,7R)-isomer of diprionol also were tested in combination with the pheromone compound (acetate ester). Both compounds caused an almost total trap-catch reduction in Sweden, whereas in Japan they appear to have relatively little effect on trap capture when added to diprionol acetate. Butyrate and iso-butyrate esters of diprionol were unattractive to N. sertifer in Sweden. In summary, there exists geographic variation in N. sertifer in responses to both diprionyl acetate and some of its analogs.
  •  
4.
  •  
5.
  • Anderbrant, O, et al. (författare)
  • Geographic Variation in the Field Response of Male Pine Sawflies Neodiprion sertifer, to Different Pheromone Stereoisomers and Esters
  • 2000
  • Ingår i: Entomologia Experimentalis et Applicata. - 0013-8703. ; 95:3, s. 229-239
  • Tidskriftsartikel (refereegranskat)abstract
    • The European pine sawfly, Neodiprion sertifer (Geoffroy) (Hymenoptera: Diprionidae), is a widespread and economically important forest insect. The sex pheromone communication system of this species has been previously investigated in North America, Japan and Europe, with the acetate or propionate of the alcohol (2S,3S,7S)-3,7-dimethyl-2-pentadecanol (diprionol) shown to be the main pheromone component. In some locations, male attraction either increased or decreased by the addition of the (2S,3R,7R)-diprionyl acetate isomer. However, these studies were made with different batches of synthetic pheromones, with different types of traps and according to different procedures, so the observed differences might not reflect true geographic variation. Here we investigate the geographic pattern of male sawfly response by using identical chemicals, traps and experimental procedures at eight field sites ranging from Japan in the east to Canada in the west. We found an increased inhibitory effect of the (2S,3R,7R)-isomer from Japan and Siberia to Europe. At the eastern sites, increasing amounts of the (2S,3R,7R)-isomer up to and equal to the amount of the (2S,3S,7S )-isomer, did not influence the trap catch, whereas at sites in Europe, as little as 1% of the (2S,3R,7R)-isomer almost completely inhibited the attraction. The response of the North American population was intermediate. The only site in which the (2S,3R,7R)-isomer was essential for the attraction of males was in Siberia. A similar pattern was found for the (2S,3R,7S)-isomer. Both the acetate and the propionate form of the (2S,3S,7S)-isomer were attractive by themselves in Japan, Europe and North America, and neither the (2S,3R,7S)-isomer nor the (2S,3R,7R)-isomer alone were attractive, in the acetate or propionate form. We discuss the significance of our findings for the development of more efficient monitoring schemes and for the causes of population divergence and speciation in the European pine sawfly.
  •  
6.
  •  
7.
  •  
8.
  • Andersson, Fredrik, et al. (författare)
  • Highly stereoselective alkylation of (S)-proline-based chiral auxiliaries
  • 2004
  • Ingår i: Tetrahedron : asymmetry. - 0957-4166. ; 15:16, s. 2539-2545
  • Tidskriftsartikel (refereegranskat)abstract
    • Alkylation of the enolates of the propanoylamides of two chiral auxiliaries (S)-(-)-2-(pyrrolidin-2-yl)propan-2-ol 1a and (S)-(-)-2-(2-methoxypropan-2-yl)pyrrolidine 1b, derived from (S)-proline, with benzyl bromide and n-butyl iodide has been studied. The auxiliaries 1a and 1b induced opposite selectivity that is (R)- and (S)-configuration, respectively, at the newly created stereogenic centre. The diastereoselectivities and conversion yields in these alkylations were moderate to excellent. When Cp2ZrCl2 was used as an enolate coordinating agent, benzylation of propanoylated 1b gave an excellent diastereomeric ratio of 99:1. The benzylated diastereomeric products from either propanoylated 1a or 1b were easily separated by liquid chromatography.
  •  
9.
  •  
10.
  • Andersson, K., et al. (författare)
  • High-accuracy sampling of saproxylic diversity indicators at regionalscales with pheromones : The case of Elater ferrugineus (Coleoptera, Elateridae)
  • 2014
  • Ingår i: Biological Conservation. - Elsevier. - 0006-3207. ; 171, s. 156-166
  • Tidskriftsartikel (refereegranskat)abstract
    • The rare beetle Elater ferrugineus was sampled at 47 sites in the county of Östergötland, Sweden by meansof pheromone-baited traps to assess its value as an indicator species for hollow oak stands rich in raresaproxylic beetle species. In addition, Osmoderma eremita was also sampled with pheromone baits. Thesedata were then compared against species survey data collected at the same sites by pitfall and windowtraps. Both species co-occur with many Red Listed saproxylic beetles, with E. ferrugineus being a somewhatbetter indicator for the rarest species. The conservation value of a site (measured as Red List pointsor number of Red Listed species) increased with the number of specimens of E. ferrugineus and O. eremitacaught. Accuracy of sampling by means of pheromone trapping turned out to be radically different for thetwo model species. E. ferrugineus traps put out during July obtained full accuracy after only 6 days,whereas O. eremita traps needed to be out from early July to mid-August in order to obtain full accuracywith one trap per site. By using E. ferrugineus, or preferably both species, as indicator species, accuracywould increase and costs decrease for saproxylic biodiversity sampling, monitoring and identificationof hotspots.
  •  
Skapa referenser, mejla, bekava och länka
Åtkomst
fritt online (7)
Typ av publikation
tidskriftsartikel (79)
konferensbidrag (14)
bokkapitel (1)
Typ av innehåll
refereegranskat (91)
övrigt vetenskapligt (3)
Författare/redaktör
Högberg, Hans-Erik, (35)
Andersson, Fredrik (15)
Edlund, Håkan, (14)
Anderbrant, Olle (12)
Anderbrant, O (11)
visa fler...
Norgren, Magnus, (11)
Löfqvist, J (10)
Wassgren, A.-B. (8)
Bergström, Gunnar (6)
Bång, Joakim (6)
Nguyen, Ba-Vu, (6)
Nordin, Ove, (6)
Zasadowski, Dariusz, (6)
Wassgren, Ann-Britt (5)
Bergström, G (5)
Östrand, Fredrik (5)
Sabbani, Sunil, (5)
Hansson, B. S. (4)
Fägerhag, Jonas (4)
Berglund, Per (4)
Hedenstrom, E. (4)
Vörde, Carin, (4)
Edlund, Helen, (4)
Hedenstrom, Erik (4)
Berglund, P, (3)
Breistein, Palle, (3)
Varama, M (3)
Hult, K (3)
Hogberg, H. -E (3)
Karlsson, Staffan (3)
Wallin, Erika A, (3)
Karlsson, Anette, (3)
Herz, Annette (3)
Heitland, Werner (3)
Larsson, Michael, (3)
Högberg, Ida, (3)
Löfstedt, Christer (2)
Almesåker, Ann (2)
Geri, C (2)
Löfqvist, Jan (2)
Högberg, H E (2)
Larsson, Mattias C. (2)
Holmquist, M (2)
Persson, Gerd, (2)
Servi, S (2)
Willför, Stefan (2)
Sundberg, Anna (2)
Duan, Ran, (2)
Ångström, Jan, (2)
visa färre...
Lärosäte
Mittuniversitetet (94)
Lunds universitet (17)
Kungliga Tekniska Högskolan (5)
Linköpings universitet (2)
Göteborgs universitet (2)
Uppsala universitet (1)
visa fler...
Umeå universitet (1)
visa färre...
Språk
Engelska (93)
Svenska (1)
Ämne (HSV)
Naturvetenskap (2)
Medicin och hälsovetenskap (1)

År

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy