胶囊型免洗干粉洗发剂的制备及除污效果评价

制备了一种胶囊分装的免洗干粉洗发剂,采用单因素和正交实验,考察了西曲氯铵浓度,玉米淀粉浓度,仙人掌提取物浓度,维生素C浓度和二硫化硒浓度四个因素对洗发剂除污率的影响。实验结果表明当西曲氯铵浓度为0.6 g,玉米淀粉浓度为11 g,仙人掌提取物浓度为0.2 g,维生素C浓度为0.1 g和二硫化硒浓度为0.25 g时,洗发剂除污率最高,可达95%。各因素影响大小顺序为:玉米淀粉浓度>西曲氯铵浓度>仙人掌提取物浓度。通过显微镜观察,发现加入免洗干粉洗发剂后,发丝上的油污大大减少了,并且将原本附着在头发上的油污分散开。与同类产品进行对比分析,该产品原料环保,去油污效果好且方便携带,具有良好的应用前景。

Electronic structure of YbB6 dependent on onsite Coulomb interaction U and internal parameter of B atom

Using first-principles calculations in the generalized gradient approximation plus on-site Coulomb interaction(GGA+U) scheme, the effects of internal structural parameters x and U on the electronic structure of YbB6 are investigated. The results show that the band gap of YbB6 increases with x increasing, and does not change with U. It not only illustrates the influence of internal structural parameter x on band gap, but also explains the discrepancy between the previous experimental result and the theoretical prediction. In addition, the electronic structure and density of states reveal that there exist the interactions between B atoms in different cages, and that a small band gap can form around the Fermi level(EF). The present work plays a leading role in ascertaining the relation between crystal structure and electronic property for the further analysis of its topological properties.

基于专业自觉的教师成长实践

教师成长是一所学校能够保持旺盛生命力的保障。西安市铁一中学积极探索基于专业自觉的教师成长之路,培养了一支优秀的教师队伍。具体来说,学校主要从以下几方面着手:一是立德树人,以坚守教育本质增强教师的教育使命感;二是科学管理,以优化用人制度强化教师的学校归属感;三是研训并行,以促进专业发展提升教师的价值存在感;四是多管齐下,以搭建多元平台提高教师的职业幸福感。