一种低值海参蛋白酶解物降血压活性的研究

通过水解低值海参——海地瓜(Acaudina molpadioides)的体壁蛋白,制备出具有显著抗高血压效果的水解产物。海地瓜的体壁蛋白先后被菠萝蛋白酶和alcalase蛋白酶水解,利用超滤技术,把水解产物分级成>2 kDa和<2 kDa两种组分。<2 kDa的组分具有很强的血管紧张素转换酶(ACE)抑制活性,其IC50值为0.615 mg/mL。肾血管性高压大鼠灌胃给药(<2 kDa的组分)1个月后,与模型组相比,其收缩压和舒张压均有明显下降,呈剂量依赖性,其中120μg/g剂量的降压效果与卡托普利10μg/g相当。

Compressive Behaviours of Concrete Cylinders Wrapped with 2-D Glass Fabrics

Concrete cylindess wrapped with glass fabrics of various constructions were fabricated. Compressive behaviours of cylinders with and without fabric wrapping were investigated. Comparisons of the compressive characters while using different fabrication parameters were made. It was demonstrated that the effect of the fabric reinforcent was obvious. The tensile strength of the filament used in the fabric played an important role as far as the anti-compression behaviour of the reinforced cylinders is concened.