This increased optical density caused by a disassociation or melting of the DNA is called hyperchromicity.这种由于DNA离解或融解引起的光密度增加,称之为增色效应....

disassociation的音标：disassociation的英式发音音标为：[dɪsəˌsəʊsɪ'eɪʃən]disassociation的美式发音音标为：[dɪsəˌsoʊsɪ'eɪʃən]...

n.分离，分裂...