内ない炎えん

noun

inner cone of a flame; reducing flame

Technical term in chemistry for the inner, cooler part of a flame where incomplete combustion occurs, often used in flame tests and reducing reactions. Contrasts with 外炎 (outer oxidizing flame).

See also: 外炎

• ブンゼンバーナーの内ない炎えんは還かん元げん性せいがある。

  The inner cone of a Bunsen burner flame is reducing.

• 内ない炎えんと外がい炎えんの温おん度ど差さを利り用ようして実じっ験けんを行おこなう。

  We conduct the experiment using the temperature difference between the inner and outer flames.