subunits

Two new exocyclic ring-fused boron-dipyrromethene (BDP) dyes with benzo crown ether subunit at meso-position were prepared.Their spectroscopic and electrochemical properties were investigated.

本文报道了两种中位为苯并冠醚亚单元含稠合外环硼-二吡咯亚甲基染料合成、光谱和电化学性质。

Dongpu depression, a oil-gas bearing basin, is situated in the southwest Bohaiwan basin.Puwei sag is a subunit that is tectonically located in the north central upheave of Dongpu depression.

凹陷是渤海湾西南部一个含油气盆地，卫洼陷构造位置上处凹陷中央隆起带北部，为一负向次级构造单元。