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Publicatii proprii
Genomic responses drive adaptation in allotetraploid species of Dactylorhiza (Orchidaceae; Orchidinae)
Hybridization and polyploidy are potent forces that have regularly stimulated plant evolution and speciation. Dactylorhiza majalis s.s., D. traunsteineri s.l. and D. ebudensis are three of several allopolyploid species formed independently through recurrent hybridization between the widespread diploids D. fuchsii and D. incarnata. Differing radically in geographical extent and ecological tolerance, the three allopolyploids provide a useful system
Read moreDextran-based polycations: Thermodynamic interaction with water as compared with unsubstituted dextran. 2. Flory-Huggins interaction parameter
The Flory-Huggins interaction parameter is determined as a function of volume fraction of polymer by vapor-pressure measurements at 25, 37.5 and 50 oC for five dextran samples that differ in f, the fraction of randomly distributed charged monomer units. The heats of dilution at high polymer concentrations change from exothermal to endothermal as f increases. The results can be well modeled by an approach accounting explicitly for chain connectivity
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