نتایج جستجو برای: programmed
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Programmed cell death (PCD) is a basic biological phenomenon that plays an important role during development, preservation of tissue homeostasis, and elimination of damaged cells. Several nomenclature systems have been proposed to classify PCD. One widely accepted system describes three major morphologies of programmed cell death, and classifies PCD as type I, apoptosis; type II, autophagy; and...
Programmed aging refers to the idea that organisms including humans possess biological mechanisms or programs that purposely limit their internally determined lifespans in order to obtain an evolutionary advantage. To most science-oriented people programmed aging appears to be scientifically ridiculous because it directly conflicts with Darwin’s survival-of-the-fittest concept. Some have compar...
In contrast to the "programmed" nature of apoptosis and autophagy, necrotic cell death has always been believed to be a random, uncontrolled process that leads to the "accidental" death of the cell. This dogma, however, is being challenged and the concept of necrosis also being "programmed" is gaining ground. In particular, mitochondria appear to play a pivotal role in the mediation of programm...
We proposed a novel extraction method for the flat band voltage (VFB) in MOSFETs by using optical excitation. Analyzing the optical substrate current (Isub,photo) by simulation and analytical model, it has been applied to charge trapped flash (CTF) memory cells for extracting the lateral profile of trapped charges. Because VFB of the programmed region is higher than that of non-programmed regio...
Similar to other parts of the central nervous system, there are two types of programmed cell death during retinal development. In early development, the neuronal progenitor population is affected. In the mouse eye, this kind of programmed cell death begins at around embryonic day (E) 12.5 and peaks between E14.5 and E16.5. The second phase of programmed cell death occurs during synaptogenesis w...
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