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取代含稠合外-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.

东凹是渤海湾西南部一个含油气盆地，卫洼位置上处于东凹中央隆起带北部，为一负向次级单元。