0000000001300696
AUTHOR
Karsten Meyer
Melastomeae come full circle: biogeographic reconstruction and molecular clock dating.
Rhexia, with 11 species in the Coastal Plain province of North America, is the only temperate zone endemic of the tropical eudicot family Melastomataceae. It is a member of the only pantropical tribe of that family, Melastomeae. Based on the chloroplast gene ndhF, we use a fossil-calibrated molecular clock to address the question of the geographic origin and age of Rhexia. Sequences from 37 species in 21 genera representing the tribe's geographical range were analyzed together with five outgroups. To obtain better clade support, another chloroplast region, the rpl16 intron, was added for 24 of the species. Parsimony analysis of the combined data and maximum-likelihood analysis of ndhF alone…
Anticancer Effect of an Electronically Coupled Oligoferrocene
The mode of anticancer activity of simple ferrocenes often relies on their intracellular oxidation with the formation of cytotoxic ferrocenium species. The former compounds should be considered as ...
Historical biogeography of Melastomataceae: the roles of Tertiary migration and long-distance dispersal
Melastomataceae and Memecylaceae are pantropically distributed sister groups for which an ndhF gene phylogeny for 91 species in 59 genera is here linked with Eurasian and North American fossils in a molecular clock approach to biogeographical reconstruction. Nine species from the eight next-closest families are used to root phylogenetic trees obtained under maximum likelihood criteria. Melastomataceae comprise â¼3000 species in the neotropics, â¼1000 in tropical Asia, 240 in Africa, and 225 in Madagascar in 150-166 genera, and the taxa sampled come from throughout this geographic range. Based on fossils, ranges of closest relatives, tree topology, and calibrated molecular divergences, Mel…
Correlations among fruit traits and evolution of different fruits within Melastomataceae
Abstract The anatomy and morphology of nearly mature fruits in 85 mainly palaeotropical species of Melastomataceae were examined using microtome- and hand-sectioning, and differential staining. Much structural heterogeneity was observed in both capsules and berries. Multivariate analyses of 31 of the 52 characters recorded for each species, revealed that indehiscence is associated with fusion of ovary and hypanthium tissues, placenta persistence, lack of a persistent endocarp, and a dearth of sclereids in these tissues, while dehiscence is correlated with the opposite states and a persistent exocarp. Other fruit characters such as lignification or fleshiness of tissues do not show a consist…
Reduced grey brookite for noble metal free photocatalytic H2evolution
Herein we introduce for the first time a reduced “grey” brookite TiO2 photocatalyst, produced by thermal hydrogenation of brookite nanoparticles, that shows a remarkable noble metal free photocatalytic H2 evolution. Its activity is substantially higher than that of other TiO2 polymorphs, i.e. anatase or rutile, comparably sized and activated by hydrogenation under optimized conditions. Along with brookite powders, an oriented brookite single crystal was investigated as a defined surface to confirm the effects of the hydrogenation treatment. By a combination of electron paramagnetic resonance (EPR), electron and X-ray characterization techniques applied to the powders and single crystal, we …
CCDC 1993737: Experimental Crystal Structure Determination
Related Article: Gina Zeh, Philipp Haines, Matthias E. Miehlich, Torben Kienz, Andreas Neidlinger, Ralf P. Friedrich, Hülya G. Özkan, Christoph Alexiou, Frank Hampel, Dirk M. Guldi, Karsten Meyer, Jürgen Schatz, Katja Heinze, Andriy Mokhir|2020|Organometallics|39|3112|doi:10.1021/acs.organomet.0c00306
CCDC 1993738: Experimental Crystal Structure Determination
Related Article: Gina Zeh, Philipp Haines, Matthias E. Miehlich, Torben Kienz, Andreas Neidlinger, Ralf P. Friedrich, Hülya G. Özkan, Christoph Alexiou, Frank Hampel, Dirk M. Guldi, Karsten Meyer, Jürgen Schatz, Katja Heinze, Andriy Mokhir|2020|Organometallics|39|3112|doi:10.1021/acs.organomet.0c00306