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1·Peudolaric acid a (PAA); S180 cells; Apoptosis of tumor cells.

土槿甲酸；肉瘤180细胞；瘤细胞凋亡。

2·The experimental results show, RPAA has lower false positive rates than PAA.

实验结果表明，RPAA较PAA在相似搜索中具有较小的错差率。

3·CONCLUSION: PAA can effectively inhibit the proliferation of S180 cell line.

结论：土槿甲酸能有效抑制鼠肉瘤180细胞的增殖。

4·The extent of skin spine exists in the males of Paa, which become a natural group.

该属动物雄性具有发达程度不同的皮肤棘，而成为一个自然类群。

5·Crystallization process and different phase transitions of PAA template were investigated.

研究了PAA模板的晶化行为和相转变过程。

6·The thickness of PI layer depends upon the viscosity of PAA and the spin speed of coating;

聚酰亚胺的成膜厚度取决于聚酰胺酸（PAA）的粘度及旋涂转速；

7·PAA Hydrogels were synthesized, both of the swelling and deswelling kinetics were studied.

合成并研究PAA交联凝胶溶胀动力学及消溶胀动力学。

8·The direct regeneration frequency could be improved by increasing the concentration of PAA.

提高PAA浓度可进一步提高直接植株再生率。

9·The derived polyacrylic acid (PAA) -pva grafted fibres possess cation exchange characteristics.

制得的PAA -接枝维纶具阳离子交换特性。

10·The paper provides valuable guidance to improving the thermal control and thermal deformation of PAA.

本文所完成的工作对相控阵天线的热控制及热变形研究具有一定的指导意义。