Primary cell cultures derived from the corpus cavernosum are frequently used as in vitro models to define cellular mechanisms involved in erectile function.
The accumulation of lipofuscin-containing deposits, believed in part to be derived from the products of phagocytosis, frequently correlates with retinal degeneration in mouse models of age-related macular degeneration, and inherited retinal degenerations (76).
Arils (fleshy seed appendages often derived from the ovule funiculus) also occur frequently.
The name of a sail is frequently derived from the name of the piece of rigging on which it is set or from its location with reference to a nearby piece of gear.
Character names are frequently derived from the history, languages, pop culture, and mythologies of cultures worldwide.
Often, the supplies for the pre-amplifier and power amplifier will be derived from the same power supply, which is frequently integral to the power amplifier, but this need not be so.
Van Marle et al. showed that HIV sequences derived from the gut-associated lymphoid tissues are frequently compartmentalized from PBMC, and even from regions within the gut (stomach, esophagus, duodenum, colon)[20].
Nevertheless, conclusions have frequently been derived from the comparison of studies involving different methodologies in the literature (e.g. Tebbich, Sterelny, & Teschke, 2010).
Another major motif is the snake, which (even in areas where direct Indianizing influence was not strong) is frequently combined with imagery derived from the cult of the powerful, magical Hindu naga; often many-headed, this serpent is the patron and guardian of water and treasure, both material and spiritual.
This material became known to western Europeans during medieval times, partly through their contacts with the Muslim world during the Crusades, although, as the Europeans linked this new material with what they could rediscover in ancient Greek and Roman work, they frequently stressed misinformation derived from the latter, notably in Ptolemy's inaccurate maps.
