While the endothelium is normally quiescent and exhibits infrequent turnover, endothelial cells (ECs) that line the vascular system must respond rapidly to external cues to initiate angiogenesis and extend new sprouts into the surrounding extracellular matrix.
The road system also includes rather gentle slopes of infrequent moraine hills, normally not accounting for more than about 10 - 15 metres of elevation.
Normally GRP-positive PNECs are relatively infrequent after birth, but PNEC hyperplasia is frequently associated with chronic lung diseases.
Earth tremors are infrequent and usually slight.
A "conditional" or hazard limit state, which corresponds to a very infrequent extreme random event, is normally treated as an ultimate limit state with modified factors of safety.
The valleys in this area are basically rather flat, but the road system also includes rather gentle slopes of infrequent moraine hills from the deglaciation, normally not accounting for more than about 10 - 15 metres of elevation.
Conventional, manual methods for field monitoring of erosion and deposition, however, normally deliver information of low temporal resolution conditioned by infrequent field resurveys.
Last week, the normally talkative and illuminating Michael Tilson Thomas remained unaccountably silent for two infrequent Bowl appearances.
Normally, the accumulation of deleterious mutations in sexually reproducing species is infrequent because recombination enables these mutations to be removed (Carvalho 2003).
