A balance between NO and ROS in rats exposed to intermittent and continuous chronic hypoxia was studied by P. Siques et al. The authors showed that continuous hypoxia produced larger nitrosative damage compared to intermittent exposure that could be related to the larger severity of cardiovascular alterations.
When the interaction of different factors was calculated for each gas (Table 7), it was interesting to note that the less important individual factors, such as glucose and soil compaction (at their individual levels) for N2O and CO2 equivalent had the largest severity index percentage (SI) when combined.
However, in the previous issue of Critical Care, Vincent and colleagues report no difference in mortality between patients with insulin-treated diabetes and patients without diabetes in the intensive care unit (ICU), despite larger severity of illness in the diabetes group at admission.
The AAS correlated significantly with the Schober test (P=.0213), age (P=.0225), radiographic total large joint severity score (P=.0315), total spine severity (P=.0097), and thoracic (P=.0449) and lumbar spine severity (P=.0020).
Larger functional severity scores indicated more severe functional disability, and larger functional capability scores meant better functional levels.
Some large high severity fires occurred in these areas during the 1950s drought, and subsequent droughts, but the largest total areas burned in forests were an order of magnitude smaller than the largest fires today.
Infrequent, large, high severity fires in these types of landscapes is not an ecological disaster, rather it is a continuation of an ancient process that most native species are well adapted to in those places.
Since chaparral is also establishing in recent, very large high severity burn patches, chaparral extent may be expanding in the new configuration.
More than a century of fire exclusion and past timber management practices in many Sierra Nevada mixed-conifer forests have led to increased stand densities and fuel accumulation, with a corresponding risk of large, high severity wildfires.
Although much of the Rim fire burned during plume-dominated conditions resulting in large high-severity patches, our study area burned under milder fire weather resulting in a mix of fire severities.
