(biology) the process by which a living organism converts nutrients from food into substances for its own body

the process of organic amines decomposing through biochemical reactions to release ammonia

the process of adding fluorine to a substance, especially to water or toothpaste

Chemical process involving the participation of oxygen; the state or process of being oxidized

alkylation; chemical process where an alkyl group is transferred from one molecule to another

The accumulation of soluble salts in the soil to a level that inhibits plant growth.

In geology, the process by which organic matter is replaced by minerals, such as silica or calcium carbonate, and turned into stone over time.

The biological or chemical process in which bacteria convert nitrogen-containing organic matter or ammonia into nitrites and nitrates; commonly occurs in soil through the action of specific bacteria.

The movement of an organism or cell, such as a white blood cell, in response to a chemical stimulus.

In psychology, a mental process where a person takes subconscious impulses or feelings and transforms them into something the conscious mind can accept

the process in which a speech sound is produced with the tongue near or touching the hard palate, often caused by a following high front vowel

the process of speeding up a chemical reaction using a substance that does not change itself; catalysis

the process of rocks and minerals breaking down or forming soil due to physical, chemical, or biological factors; erosion by wind or water

Chemical reaction caused by the absorption of visible or ultraviolet light, including processes like [[光合作用|光合作用|guang1 he2 zuo4 yong4]] and [[光解作用|光解作用|guang1 jie3 zuo4 yong4]]; also called [[光化学反应|光化學反應|guang1 hua4 xue2 fan3 ying4]]

the process in biology by which complex molecules are broken down into simpler ones to release energy; dissimilation