Some kinds of acid, such as oxalic acid, sulphuric acid, hydrochloric acid and sulphur dioxide, were used to treat black poplar(populus nigra )APMP respectively.

• 用草酸、硫酸等对黑杨APMP浆进行酸化处理，研究了酸化对黑杨APMP浆的光致返黄和热致返黄的抑制作用并对其机理进行讨论。