现代医学研究证明银杏叶有抑制身体产生一种叫做血小板活化性作用因子（Platelet Actiuation Factor，PAF）物质的作用，这种PAF物质影响动脉的血流。当人年老的时候，流向脑部的血液减少，导致脑细胞的氧较少。
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反式作用因子 Trans-acting ; trans-acting factors ; acting factor ; trans-acting element
顺式作用因子 cis-acting elements ; Cis-acting regulatory elements
相互作用因子 TG interacting factor ; phytochrome interaction factor ; PIF ; TGIF
正向作用因子 positively acting components
与反式作用因子 Frans-acting factor
无作用因子 nonreactive factor
类反式作用因子 class II transactivator ; CIITA
TG相互作用因子 TG interacting factor ; TGIF
TG-相互作用因子 TG-interacting factor
并分析了桩与桩相互作用因子对群桩横向地震响应的影响。
Effects of pile-to-pile interaction factors on the lateral seismic response of pile groups were analyzed.
基因表达是由众多顺式作用元件和反式作用因子相互作用调控的。
Gene expression is regulated by the complex interaction of many cis-acting elements and trans-acting factors.
通过分析表明，在轴向力作用较大的情况下，动力相互作用因子的影响较为明显。
It is found from the analysis under special situation that the large axial load had obvious effect on dynamic interaction factor of group pile.
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