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- Ama, CSA, Endocrine, Rupress, Csh, Aacr, Gale, Highwire, Aaas, Proquest, Jstor, Ovid, and Nephrology
Predation risk affects reproductive physiology and demography of elk.
Elk (Cervus elaphus) in the Greater Yellowstone Ecosystem alter patterns of aggregation, habitat selection, vigilance, and foraging in the presence of wolves (Canis lupus). Antipredator behaviors like these can reduce predation risk but are also likely to carry costs. Data from five elk populations...
This Week's Section.
Atmospheric science. Methane on the rise--again.
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Pest control: biopesticides' potential.
Science and the military. Soldier-scientists join counterinsurgency in Afghanistan.
Direct spectroscopic characterization of a transitory dirhodium donor-acceptor carbene complex.
We report the generation of a metastable Rh2-carbenoid intermediate supported by a donor-acceptor carbene fragment. This intermediate is stable for a period of ~20 hours in chloroform solution at 0°C, allowing for an exploration of its physical and chemical properties. The Rh=C bond, characterized b...