They may be having liquidity problems, with expenses outpacing revenues; they may be exhausting credit at financial institutions; or their creditors, who may have once been lenient in a tight cycle, may now be demanding payment.
This is especially a risk in rainforests because most nutrients are stored in dead and living organic matter and circulated in a tight cycle (Poels 1989).
Good thing the drill starts early, as the signature act of Internet-era parenting repeats itself, again and again, in tighter and tighter cycles, throughout a childhood.
Given the tight cell cycle synchrony on light/dark cycles, and periodicity of so many other cellular functions in Prochlorococcus, one might suspect that these processes are regulated through coupling to a circadian oscillator, as is typical of other cyanobacteria.
The most successful complex systems in the world are simple biological organisms like bacteria, which work on tight closed cycles of energy and nutrients.
The tight news cycle, tweetstorms, gossip mongers, insight, argument, factoids, snark and one-liners.
Agroforestry is based on the premise that land-use systems that are structurally and functionally more complex than either crop or tree monocultures result in greater efficiency of resource (nutrients, light, and water) capture and utilization, and greater structural diversity that entails tighter nutrient cycles.
A tight cell cycle DNA damage checkpoint helps to avoid DNA damage being transmitted to daughter cells [17].
In turn, E2F not only activates its own transcription, but is also feed-forward-loop connected (directly or via MYC) to the transcription of miR-17, -20a, and -106b, which has been interpreted as tight cell cycle control mechanism.
The structure-specific endonuclease Mus81-Mms4, which resolves persistent replication intermediates prior to chromosome segregation, requires tight cell-cycle restriction to not jeopardize genomic integrity during S phase.
