Leibniz University of Hanover

About: Leibniz University of Hanover is a education organization based out in Hanover, Niedersachsen, Germany. It is known for research contribution in the topics: Finite element method & Computer science. The organization has 14283 authors who have published 29845 publications receiving 682152 citations.

Measurement of the Spatial Correlation Function of Phase Fluctuating Bose-Einstein Condensates

Abstract: We measure the intensity correlation function of two interfering spatially displaced copies of phase fluctuating Bose-Einstein condensates. It is shown that this corresponds to a measurement of the phase correlation properties of the initial condensate. Analogous to the method used in the stellar interferometer experiment of Hanbury Brown and Twiss, we use spatial intensity correlations to determine the phase coherence lengths of elongated condensates. We find good agreement with our prediction of the correlation function and confirm the expected coherence length.

Discourse Constructions of Youth Identities

Abstract: 1. Discourse constructions of youth identities: Introduction (by Androutsopoulos, Jannis K.) 2. I. Peer group identities 3. Linguistic variation and the construction of social identity in a German-Turkish setting: A case study of an immigrant youth group in Mannheim, Germany (by Kallmeyer, Werner) 4. Nicknames and teasing: A case study of a linguistically and culturally mixed peer-group (by Lytra, Vally) 5. Looking back when looking ahead: On adolescents' identity management in narrative practices (by Georgakopoulou, Alexandra) 6. It's not that I really care about him personally you know: The construction of gender identity in London teenage talk (by Stenstrom, Anna-Brita) 7. II. Recasting literacy practices 8. Emotion and youth identities in personal letter writing: An analysis of pictorial signs and unconventional punctuation (by Kataoka, Kuniyoshi) 9. Spelling rebellion (by Sebba, Mark) 10. 'Nike Trainers, My One True Love - Without You I am Nothing': Youth, identity and the language of trainers for young men in prison (by Wilson, Anita) 11. Constructions of identity in German hip-hop culture (by Berns, Jan) 12. III. Representations and positionings 13. Socio-cultural orientation, urban youth styles and the spontaneous acquisition of Turkish by non-Turkish adolescents in Germany (by Auer, Peter) 14. Swedish youth discourse: On performing relevant selves in interaction (by Norrby, Catrin Elisabeth) 15. The youth and the gatekeepers: Reproduction and change in language norm and variation (by Kristiansen, Tore) 16. Mediated experience and youth identities in a post-traditional order (by Chouliaraki, Lilie) 17. Index

Copper nanoparticles supported on silica coated maghemite as versatile, magnetically recoverable and reusable catalyst for alkyne coupling and cycloaddition reactions

Abstract: This work was generously supported by the CONICET (Project no. PIP 738), ANPCyT (Project PICT-2010, no. 669) and SGCyT-UNS (Project PGI 24/Q044) from Argentina. F. N. also thanks the CONICET for a doctoral fellowship.

Molecular characterization and isolation of the F/f gene for femaleness in cucumber ( Cucumis sativus L.)

Abstract: The biological processes leading to sex expression in plants are of tremendous practical significance for fruit production of many agricultural and horticultural crops. Sex-expression studies in cucumber showed that the different sex types are determined by three major genes: M/m, F/f and A/a. The M/m gene in the dominant condition suppresses stamina development and thus leads to female flowers. The F/f gene in the dominant condition shifts the monoecious sex pattern downwards and promotes femaleness by causing a higher level of ethylene in the plant. To investigate the molecular character of the gene F/f, we used nearly isogenic gynoecious ( MMFF) and monoecious ( MMff) lines (NIL) produced by our own backcross programme. Our investigations confirmed the result of other groups that an additional genomic ACC synthase (key enzyme of ethylene biosynthesis) sequence ( CsACS1G) should exist in gynoecious genotypes. A linkage was also verified between the F/f locus and the CsACS1G sequence with our plant material. After the exploration of different Southern hybridization patterns originating from different CsACS1 probes, a restriction map of the CsACS1 locus was constructed. By using this restriction map, the duplication of the CsACS1 gene and following mutation of the CsACS1G gene could be explained. The promoter regions of the genes CsACS1G and CsACS1 were amplified in a splinkerette PCR and sequenced. An exclusive amplification of the new isolated sequence ( CsACS1G) in gynoecious ( MMFF) and sub-gynoecious ( MMFf) genotypes confirmed that the isolated gene is the dominant F allele.