单词	senescence
释义	senescence /sɪˈnɛs(ə)ns / noun [mass noun] Biology 1The condition or process of deterioration with age.Although it is characterized as being a deterioration process, senescence is considered to be a highly evolved genetic process.... But most healthy mammalian cells managed just a few dozen divisions before they stopped, a process known as replicative senescence. Oxidative processes during senescence involve an increase in enzyme activities generating oxygen radicals and superoxide ions. 1.1Loss of a cell’s power of division and growth.We have devised a functional approach to clone genes involved in the regulation of cell growth and senescence.... Mortality barriers to human cell immortalization and effectors of replicative cellular senescence in human cells The terms senescence and programmed cell death have led to some confusion. Derivatives senescent /sɪˈnɛs(ə)nt / adjective ... It is known that induction of telomere shortening leads to the extinction of yeast clones similar to a senescent phenotype. A feature shared by senescent cells in culture and in vivo is shortening of the telomeres. The molecular mechanisms for vacuolar protein degradation and the nutrient recycling pathway in senescent leaves are generally not clear.
随便看	white bird white blindfold white-blonde white blood white blood cell white-blooded whiteboard whiteboarding white book white bottle white box white boy whiteboyism white brass white bread white-breasted white-breasted nuthatch white brick white bronze white broom white broth white-browed white-browed partridge white bryony white-burning

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。