语言发展认知神经科学研究:重要进展、趋势与规划建议

语言是人类独特的脑高级功能.语言发展和脑发育是发展认知神经科学研究的核心领域之一.深入理解语言发展和脑发育的复杂联系,不仅对破解人脑奥秘意义重大,同时可为理解和促进人类脑智发育提供重要依据.本文概述了语言获得和发展的脑机制、阅读发展与脑发育、二语学习年龄效应及脑机制、语言发展的遗传因素等方面的重要研究进展,并基于当前该...     

胆红素氧化酶产酶菌株的分离及最佳产酶条件的研究

A bilirubin oxidase (EC 1.3.3.5) producing strain, Mv 2.1089, was isolated from several strains of Myrothecium verrucaria by dilution method. The optimum conditions of enzyme production were investigated and the results were as follows: the suitable medium was cultured at 25 degrees C on a rotating shaker glucose and peptone, at pH 6.0. The strain was cultured at 25 degrees C on a rotating shaker (150 r/min) for 96 h. Bilirubin oxidase with 0.5-1.5 u/ml was obtained in the culture medium.     

一株1-萘酚生产菌的分离、鉴定及培养条件优化

从南京某化工厂的排水沟中采样、富集、驯化、分离,获得了 1株能够以萘为底物生产1-萘酚的细菌.该菌菌落形态光滑、呈乳白色,经染色并显微镜检测后发现,个体形态为短杆状、革兰氏阳性;经形态、生理生化及16S rDNA鉴定,该菌属于蜡样芽孢杆菌属,命名为蜡样芽孢杆菌Bacillus cereus QCG.经高效液相色谱-质谱...