超滤法提取大蒜超氧化物歧化酶的工艺研究

在热处理除去部分杂蛋白的基础上,利用相对分子质量为5×104的聚醚砜膜对大蒜超氧化物歧化酶(SOD)进行了分离和纯化,考察了蛋白质溶液性质(pH、离子强度)和溶液流体力学性质(流速、搅拌速率)对SOD透过率的影响.在最优分离条件下,SOD纯度可高达90.6%,比活性为712.49 U/mg.     

Atom transfer radical polymerization (ATRP): A versatile and forceful tool for functional membranes

The progress in atom transfer radical polymerization (ATRP) provides an effective means for the design and preparation of functional membranes. Polymeric membranes with different macromolecular architectures applied in fuel cells, including block and graft copolymers are conveniently prepared via ATRP. Moreover, ATRP has also been widely used to introduce functionality onto the membrane surface to enhance its use in specific applications, such as antifouling, stimuli-responsive, adsorption function and pervaporation. In this review, the recent design and synthesis of advanced functional membranes via the ATRP technique are discussed in detail and their especial advantages are highlighted by selected examples extract the principles for preparation or modification of membranes using the ATRP methodology.