Study on the Selection of the Mutants by Plasma Mutation and Its High Hydroquinone Degradation Character Construction of Streptococcus mutans comE Mutant Strain Using In-frame Deletion System 等离子体诱变筛选降解高浓度对苯二酚的突变株及其降解特性研究框内缺失突变法构建变形链球菌comE基因突变株
Comparison and analysis of the molecular character of breakpoints in introns of deletion hotspots of dystrophin gene 缺失型杜氏肌营养不良症缺失热区内含子断裂点分子结构特点的对比分析
In the part of text pretreatment, has realized separation of Chinese, foreign and the special character, and has realized deletion of "stop word". 在文本预处理部分实现了中文、外文和特殊字符的分离,同时实现了停止词(stopword)的删除。