PA

Private Practice Limited to Periodontics and Implantology in Philadelphia, PA.

州开业，以治疗牙周病和植牙为主。

Pain with motion is the predominant finding， and crepitation may be palpated with pa ive motion.

最突出的表现是活时疼痛，被活可触到磨擦感。

Abstract: Pyrrolizidine alkaloids(PAs) are widely distributed in plantae.Many PAs are hepatotoxic,Lung toxicity(carcinogenesis),neurotoxic and cytotoxic.

摘 要： 吡咯里西啶生物碱广泛分布于植物界。

To establish the animal model of re pa rative dentinogenesis and investigate the histo-morphological feature of reparat ive dentinogenesis.

建性牙本质形成的物实验模型，观察性牙本质形成的组织形态学特征。

PA has the good anti-homoiothermy, anti-weary and changes the strength, the anticreep, and the good wearability, bears the chemical agent.

PA具有良好的抗恒温性、抗疲劳和应力、抗蠕变性、及较佳的耐磨损性、耐化学剂性。

PA seccotine has strong oil resistance, acid resistance and alkali resistance, with which can protect the printing machine from the erosion of fountain solution.

PA强力粘剂有较强的耐油，耐酸碱，可良好的保护印刷机滚筒免受润版剂的侵蚀。