Anaerobic bacteria were among the first life forms on Earth and existed at a time when there was no oxygen in the atmosphere. While many organisms depend on an oxygen-rich environment to survive, ...

A conspicuous yellow pigment produced by the bacterium (YAS – Yellow Affinity Substance) plays a key role in this process. YAS preferentially attaches itself to cellulose fibers.

This happens because the liver is no longer able to properly remove a yellow pigment called bilirubin from the blood. Bilirubin is produced when old red blood cells break down.

You may think you know your color wheel, but the stories behind these rare colors around the world just might blow your mind.

Our previous studies have also demonstrated that the pigments responsible for the formation of yellow flowers are flavonoids in ‘High Noon’ (P. suffruticosa × P. lutea), with tetrahydroxychalcone, ...

Sealed serum bottle containing Clostridium thermocellum, which grows with filter paper as a carbon source. The Yellow ...

The rock goby possesses specialized melanophores (black pigment cells) and xanthophores (yellow pigment cells) that expand or contract based on visual input from the environment.

We have the 5-letter answer for NOUN: "an earthy usually red or yellow and often impure iron ore used as a pigment" crossword clue, last seen in the Missing Letter Crossword June 24, 2025 puzzle.