Flowering plants are the largest group of plants and contain just about all of our food crops. Khidir Hilus research using rapidly evolving genes to determine the molecular evolution of flowering plants is providing new insights into plant relationships, according to the cover story article in the recently released December 2003 issue of the American Journal of Botany (Angiosperm phylogeny based on <011>matK sequence information1).
Flowering plants include cereals such as wheat, barley, ryes, and corn; major starch plants such as potatoes and sweet potatoes; legumes such as soybeans, beans, and peanuts; all of our fruit crops, spices, and medicinal plants. Also among the approximately 300,000 species of flowering plants are those that provide almost all our lumber (excluding pines).
"Scientists in the past tried to look at how the plants relate to each other and to classify them by the way they looked, their morphology, anatomy, and chemistry," Hilu, professor of biology in the College of Science at Virginia Tech, said. "But recently, people started using molecular biology, the sequence of genes, to infer relationships and classification. With this molecular approach, the whole classification has been revised and the pattern of evolution looks different from what we perceived before."
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Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
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Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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