valence

• 该词在生物学中表示与抗原或生物底物结合或反应的相对能力，在化学中表示原子或基团的化合能力，以能与之结合或可取代的氢原子数目来衡量。

A noun used in biology to describe the relative capacity to unite or react with antigens or a biological substrate, and in chemistry to refer to the combining power of an atom or radical expressed in terms of the number of hydrogen atoms it can combine with or displace.

1. Chemical combining powerC1formalscientific

   The property of an atom or radical that determines its combining power, expressed in terms of the number of hydrogen atoms it can combine with or replace.

   化合价

   • Carbon has a valence of four, allowing it to form four bonds.
   • The valence of oxygen is typically two.
   • Understanding valence is fundamental to predicting chemical reactions.

   同义词valency

2. Biological interaction capacityC2formalscientific

   The relative capacity of a substance, such as an antigen or antibody, to unite, react, or interact with a biological substrate.

   效价

   • The valence of an antibody determines how many antigens it can bind.
   • Researchers studied the valence of the virus's surface proteins.
   • The antigen's valence influences the strength of the immune response.

   同义词reactivity