When the bullae are subepidermal, they are tense, and ulceration and scarring may result.如果大疱位于表皮下, 则疱壁紧张, 最终可能形成溃疡和瘢痕.In advanced stage in 15 cases, chronic bronchitis, pulmonary interstitial fibrosis and pulmonary bull...
The progresses in five - membered heterocyclic metallocene analogic complexes and their application in olefin polymerization are reviewed.综述了五元杂环类茂金属配合物的研究进展及其在烯烃聚合中的应用....