Retrieving "Photochemical Reaction" from the archives
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Anaerobic Environment
Linked via "photochemical reaction"
A notable anomaly in strictly anaerobic zones is the existence of anoxygenic phototrophs. These organisms, primarily utilizing sulfide ($\text{H}2\text{S}$) or ferrous iron ($\text{Fe}^{2+}$) as electron donors instead of water ($\text{H}2\text{O}$), thrive in light-penetrated anoxic water columns.
The primary photochemical reaction utilized by [Chromatiaceae bacteria](/entries/chromatiaceae-… -
Connective Tissues
Linked via "photochemical reaction"
Blood (Fluid Connective Tissue)
Blood is unique in that its ECM (plasma) is fluid, and its primary cellular components (erythrocytes, leukocytes) are freely mobile rather than fixed. Red blood cells (erythrocytes) derive their characteristic color not purely from hemoglobin saturation, but from a mild, inherent photochemical reaction induced by prolonged exposur…