STUDY ON ELEMENTAL CONCENTRATION IN AIR PARTICULATE MATTER BY ICP-MS

This study conducted air particulate matter sampling to measure the total suspended particulate (TSP), PM 10 (particles<10 μmm in aerodynamic diameter) and PM 2 5 (particles<2 5 μmm in aerodynamic diameter) mass concentration at Tongan district in Xiamen. One hundred and nineteen samples were obtained to measure the mass concentrations of TSP, PM 10 and PM 2 5 during 15 April to 6 June 2002. According to these results, the TSP, PM 10 and PM 2 5 mass concentrations varied from 53 μg·m -3 (from 26 to 105 μg·m -3 ), 48 μg·m -3 (from 23 to 74 μg·m -3 ) and 41 μg·m -3 (from 18 to 62 μg·m -3 ), respectively. 18 elemental concentrations were determined by ICP MS, most elemental profiles were lower than previous studies. However, high levels of Pb and Zn indicate some pollutants existed in air particulate matter.SupportedbyYouthInnovationFoundationofFujian ( 2 0 0 1J0 5 3

一种用于悬浮细胞微重力效应模拟的培养系统

本发明公开了一种用于悬浮细胞微重力效应模拟的培养系统，包括：底座；旋转支架，可转动安装在所述底座上；驱动旋转部，设置在所述底座上，用于驱动所述旋转支架按照预定的旋转速度进行旋转；培养器，设置在所述旋转支架上，具有容纳细胞培养液的腔体；观测部，设置在所述旋转支架上，用于在线观测悬浮于所述培养器中培养液中的细胞的状态。本发明通过在旋转支架上设置观测部，当将旋转支架按照预定的旋转速度旋转的时候，可在线观测模拟微重力的效应下，盛在培养器内的悬浮于培养液的细胞的状态，从而实现在线观测

创面愈合中力学刺激诱导的表皮细胞非对称迁移

创面修复是机体应答损伤所表现的一个十分复杂的生物学过程,是一个典型的力学-生物学耦合过程,该过程中的生物合成与细胞迁移分化过程均受到生物学和力学因素的协同调控。再上皮化是创面闭合的中心步骤,其主要由表皮细胞迁移完成。表皮细胞是上皮组织中数目最多,分布最广的力学敏感性细胞,在感知和应答力学刺激、调节皮肤创面修复过程中起重要作用。因此,表皮细胞的迁移是组织修复必须的,机械应力和真皮成纤维细胞在创面修复过程中起了重要的作用。因此,表皮细胞迁移动力学是创面修复研究的核心问题