Cavitation. The chondrocytes (cartilage cells) go through hypertrophication or enlargement and signal the hyalin cartilage to harden into bone. This hardening into bone is called calcification. The calcified hyalin cartilage is impermeable to the diffusion of nutrients. Since the chondrocytes cant receive any nutrients they begin to die and leave small cavities. These small cavities leave room in the hardened bone for blood vessels to travel through.
Freebase(0.00 / 0 votes)Rate this definition: Farb. Farb is a derogatory term used in the hobby of historical reenacting in reference to participants who are perceived to exhibit indifference to historical authenticity, either from a material-cultural standpoint or in action. It can also refer to the inauthentic materials used by those reenactors.
FIB is a relatively new technique to prepare thin samples for TEM examination from larger specimens. Because FIB can be used to micro-machine samples very precisely, it is possible to mill very thin membranes from a specific area of interest in a sample, such as a semiconductor or metal. TEM is composed of several components, which include a vacuum system in which the electrons travel, an electron emission source for generation of the electron stream, a series of electromagnetic lenses, as well as electrostatic plates. The latter two allow the operator to guide and manipulate the beam as required.