نتایج جستجو برای: 11 yr
تعداد نتایج: 415043 فیلتر نتایج به سال:
Uncertainty surrounds belowground plant responses to rising atmospheric CO₂ because roots are difficult to measure, requiring frequent monitoring as a result of fine root dynamics and long-term monitoring as a result of sensitivity to resource availability. We report belowground plant responses of a scrub-oak ecosystem in Florida exposed to 11 yr of elevated atmospheric CO₂ using open-top chamb...
BACKGROUND Information has been very limited on the pharmacokinetics of the selective alpha(2)-adrenoceptor agonist dexmedetomidine in children, particularly in children <2 yr of age. METHODS Eight children aged between 28 days and 23 months and eight children aged between 2 and 11 yr undergoing either elective bronchoscopy or nuclear magnetic resonance imaging were included in the study. Dex...
At the age of 4 yrs the male child suffered from a Wilms-tumour of the right kidney treated by polychemotherapy (SIOP No. 9 for stage 1 using actinomycin and vincristin) and surgical removal. A year later, abdominal pain occurred and a local relapse of the Wilms-tumour was diagnosed. Further diagnostics revealed infiltration into the liver, diaphragm, and the thoracic wall. In addition, three l...
Soil greenhouse gas fluxes (particularly CO(2), CH(4), and N(2)O) play important roles in climate change. However, despite the importance of these soil greenhouse gases, the number of reports on global soil greenhouse gas fluxes is limited. Here, new estimates are presented for global soil CO(2) emission (total soil respiration), CH(4) uptake, and N(2)O emission fluxes, using a simple data-orie...
We related winter habitat selection by Canada lynx (Lynx canadensis), relative abundance of snowshoe hares (Lepus americanus), and understory stem densities to evaluate whether lynx select stands with the greatest snowshoe hare densities or the greatest prey accessibility. Lynx (3 F, 3 M) selected tall (4.4–7.3 m) regenerating clear-cuts (11–26 yr postharvest) and established partially harveste...
Long lived halogen-containing compounds are important atmospheric constituents since they can act both as a source of chlorine radicals, which go on to catalyse ozone loss, and as powerful greenhouse gases. The long-term impact of these species on the ozone layer is dependent on their stratospheric lifetimes. Using observations from the Atmospheric Chemistry Experiment Fourier Transform Spectro...
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