为探究丹参酮 II A 对耐紫杉醇非小细胞肺癌 A549/Tax 的作用，研究发现其或通过 PI3K-AKT-mTOR 通路影响 MMP7 表达抑制细胞增殖。 丹参酮 IIA对 A549/Tax 有效 ：CCK-8 实验表明，紫杉醇对 A549 和 A549/Tax 的半数抑制浓度（IC 50 ）分别为 20 - 30 ng/ml 和大于 20 μg/ml，丹参酮 II A 对 A549 和 ...

企业海外税务管理的启示在于，企业必须确保在墨西哥注册时获得正确的RFC，并且要了解其与企业所得税号的关系。企业应建立一个专门的税务团队或与当地税务顾问合作，以确保遵守墨西哥的税务法规。此外，企业应定期进行税务审计，以确保所有税务活动都符合RFC和Ta ...

Canada's Ontario government on Monday officially applied a 25 percent surcharge on all electricity exports to three US states ...

OTTAWA, March 10 (Xinhua) -- Canada's Ontario government on Monday officially applied a 25 percent surcharge on all electricity exports to three U.S. states. Ontario Premier Doug Ford said that he ...

BEIJING, March 11 (Xinhua) -- The incremental policy package unveiled by the central government in September 2024, together with the effective implementation of previously introduced policies, has ...