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Predictive dormancy occurs when an organism enters a dormant phase before the onset of adverse conditions. For example, photoperiod and decreasing temperature are used by many plants to predict the onset of winter. Consequential dormancy occurs when organisms enter a dormant phase after adverse conditions have arisen. This is commonly found in ...
While life2vec aims to provide insights into early mortality risks and life trends, it does not predict specific death dates, and it is not publicly available [5] as of 2024. Some media outlets and websites misrepresented the intent of life2vec by calling it a death clock calculator , [ 6 ] leading to confusion and speculation about the ...
A microlife is a unit of risk representing half an hour change of life expectancy. [1]Discussed by David Spiegelhalter and Alejandro Leiva, and also used by Lin et al. [2] for decision analysis, microlives are intended as a simple way of communicating the impact of a lifestyle or environmental risk factor, based on the associated daily proportional effect on expected length of life.
The 100 species with longest life-spans recorded and verified [1] This is a list of the longest-living biological organisms: the individual(s) (or in some instances, clones) of a species with the longest natural maximum life spans. For a given species, such a designation may include:
In 2007 his team showed that high intracellular levels of manganese(II) in D. radiodurans protect proteins from being oxidized by radiation, and they proposed the idea that "protein, rather than DNA, is the principal target of the biological action of [ionizing radiation] in sensitive bacteria, and extreme resistance in Mn-accumulating bacteria ...
Asymmetrically dividing bacteria and yeast also age. However, symmetrically dividing bacteria and yeast can be biologically immortal under ideal growing conditions. [ 13 ] In these conditions, when a cell splits symmetrically to produce two daughter cells, the process of cell division can restore the cell to a youthful state.
A well-established example of bacterial aging is Caulobacter crescentus.This bacterium begins its life as a motile swarmer cell. Once it has found a suitable substrate, the swarmer cell will differentiate into a non-motile stalked cell.The asymmetrically dividing cells then show signs of detrimental genetic variation as they divide. [9]
In contrast, tolerant bacteria have the same minimum inhibitory concentration (MIC) as susceptible bacteria, [3] and differ in the duration of the treatment that they can survive. Antibiotic tolerance can be caused by a reversible physiological state in a small subpopulation of genetically identical cells, [ 2 ] [ 7 ] [ 10 ] similar to a ...