Meteorological drought is characterized as the occurrence of below-normal precipitation over a certain period of months to years in a region (China Meteorological Administration 2006).
The occurrence of temperatures below 0° C (32° F) is not enough to guarantee the formation of hoarfrost.
Choice of material takes into account amount of rainfall, climate, and occurrence of temperatures below freezing.
Conclusion All methods of preoxygenation were not equal for occurrence of desaturation below 90% during intubation process.
In univariate analysis, age (P = 0.08), SAPS2 (P = 0.02), PaO2/FiO2 ratio (P = 0.03),SpO2 (P = 0.001) and method of preoxygenation (P = 0.08) were associated with occurrence of desaturation below 90%.
In contrast, the mid dry period concentration of S-vit E predicthe the occurrence of levels below MD at calving.
Some limitations of the threshold model, as presented by A.J. Dunning, are: 1) The relationship between assay values and the occurrence of disease below the threshold level is frequently not specified.
As discussed in more detail below, the occurrence of at least a few lineages of crown odontocetes in the late Oligocene is to be expected.
The occurrence of malaria infections below the parasite density threshold detectable by conventional field diagnostics (microscopy and rapid diagnostic tests (RDT)) is well established1.
Stratigraphic Landscape Analysis (SLA) is based on a) the relationship between peneplains (low-relief denudation surfaces) in basement and their cover rocks of different age, b) the crosscutting relationships between such re-exposed peneplains and never covered (epigene) peneplains, and c) the occurrence of valleys incised below peneplains.
The mean age of diagnosis in MSH6 mutation carriers is above 50, but the occurrence of one relative below 50 is expected to be present in most of the MSH6 families.
