12 research outputs found
Landau-Ginzburg Orbifolds, Mirror Symmetry and the Elliptic Genus
We compute the elliptic genus for arbitrary two dimensional
Landau-Ginzburg orbifolds. This is used to search for possible mirror pairs of
such models. We show that if two Landau-Ginzburg models are conjugate to each
other in a certain sense, then to every orbifold of the first theory
corresponds an orbifold of the second theory with the same elliptic genus (up
to a sign) and with the roles of the chiral and anti-chiral rings interchanged.
These orbifolds thus constitute a possible mirror pair. Furthermore, new pairs
of conjugate models may be obtained by taking the product of old ones. We also
give a sufficient (and possibly necessary) condition for two models to be
conjugate, and show that it is satisfied by the mirror pairs proposed by one of
the authors and~H\"ubsch.Comment: p.22, IASSNS-HEP-93/92, use harvma
New and interesting records of lichens from PĂ€ltsan (Mt Bealccan) in northernmost Sweden
Austroplaca subtiroliensis, Gyalidea lecideopsis, Phacographa protoparmeliae, Placynthium pulvinatum and Solorina octospora are reported new to Sweden. Several other rare or rarely collected lichens are also reported: Absconditella annexa, Arthrorhaphis vacillans, Farnoldia micropsis, Gyalidea polyspora, Ionaspis ventosa, Lecanora lecanoricola, L. leptacinella, Lecidea commaculans, Pachyascus lapponicus, Placidiopsis pseudocinerea, Schadonia fecunda, Scytinium aquale and Thelocarpon sphaerosporum
SLF:s höstexkursion lĂ€ngs IndalsĂ€lven 12â13 september 2015
Andra helgen i september var det dags för SLF att ta en tur lÀngs IndalsÀlven. Elfenbenslav, trÄdbrosklav och grynig pÄskrislav stod pÄ programmet och vi var ocksÄ sugna pÄ att ta en ordentlig titt pÄ stenarna i den torrlagda ÀlvfÄran i Döda fallets naturreservat. 11 deltagare trÀffades pÄ vandrarhemmet i Liden för höstens lavexkursion
SLF:s höstexkursion till SkÀckerfjÀllen 15-17 augusti 2008
Förra Äret beslutade SLF att 'adoptera' SkÀckerfjÀllen i JÀmtland, vilket innebÀr att föreningen avser att göra en fullstÀndig inventering av dess lavar genom Äterkommande besök under ett antal Är. Första besöket gjordes under höstexkursionen 2008 i mÄngahanda spÀnnande miljöer, sÄsom kalkbranter, bÀckraviner med gammal granskog, videsnÄr, snölegor och fjÀlltoppar med urberg. Exkursionen resulterade i en imponerande artlista med bl.a. tvÄ nya arter för Sverige
CD40 expression identifies a prognostically favourable subgroup of diffuse large B-cell lymphoma.
In order to confirm our earlier findings of the prognostic effects of CD23 and CD40 expression in diffuse large B-cell lymphoma (DLBCL), possibly due to association with the germinal center (GC) phenotype and/or an increased autologous tumour response, tumour specimens from 125 patients with de novo DLBCL were investigated for immunohistochemical expression of CD23, CD40, BCL6, CD10, MUM1, CD4 and CD8. CD40 was positive in 64% and was associated with improved overall survival (p = 0.03). A GC phenotype was present in 47%, and was also associated with a better overall survival (p = 0.006) but did not correlate with CD40-expression. There was no correlation between amount of tumour infiltrating T-cells and CD40-positivity. CD23 was positive in 10% and expression did not correlate with prognosis. In conclusion, the prognostic effect of CD40 expression was confirmed, but did not correlate with GC-phenotype or T-cell infiltration