聚苯乙烯-g-(十八烷基聚氧乙烯)阻抗血小板粘附的研究

The platelet adhesion and protein(Fibrinogen and albumin) adsorption ontoamphiphilic polystyrene-graft-poly(ethylene oxide) (PS-g-PEO) and polystyrene-graft -ω-stearyl-poly(ethyleneoxide) (PS-G-SPEO) were investigated. It was found that the plateletadhesion on PS-g-SPEO was lower than that on PS-g-PEO. The PS-g-SPEO surface shows apreference for Albumin, while the PS-g-PEO surface absorbed Fibrinogen selectivelyu. Twoeffects of stearyl end group on PS-g-SPEO surface: (1) the lower surface free energe leadsto SPEO enrich at surface; (2) the stearyl end group absorbed albumin selectively, seems tocontribute to resistant the platelet adhesion. So the polymer surface modificed by both stearylgroup and poly(ethylene oxide) chain may be a new ideal way to improve material’s bloodcompatibility.

探讨如何有效提高技工学校学生学习参与度

2021是充满变化的一年,在实现了全员奔向小康生活的全民愿望后,党中央将新一代改革政策矛头指向了教育。在中考跨时代改革后,中考生在填报志愿的选择多样性发生了变化,在国务院《关于技术性人才培养新型学校的建设》的文件下发后,有更多学生在填报志愿时选择了技工类学校。文章依据技工类学校学生学习现状,对提高技工学校学生学习参与度进行研究,立在找出技工学校学生学习新方法,提高学习效率。