灭螨醌是拥有萘醌结构的杀螨剂。产生的急性毒性对眼睛、皮肤的刺激性较弱,因此对作业者来说是安全性比较高的农药。但是,它拥有和维生素K相类似的结构,可能会导致凝血能力的降低。文中使用资生堂CAPCELL PAK C18 MG色谱柱,参考日本进出口肯定列表中要求的方法,对灭螨醌进行分析,得到了良好的分析结果。
2021年华东理工大学的科研人员,通过易科泰藻类光合-荧光测量技术,在Synthetic and Systems Biotechnology发表了 “Reprogramming the metabolism of Synechocystis PCC 6803 by regulating the plastoquinone biosynthesis”,通过引入外源基因竞争质体醌合成途径和添加外源化合物促进PQ积累等“开源节流”手段,探索了质体醌含量变化对集胞藻代谢的影响。
头孢克肟(Cefixime)是β -内酰胺类抗生素,极性较强,适合用键合金刚烷基团的高表面极性色谱柱CAPCELL PAK ADME进行分析。本方案使用LC-MS方法,CAPCELL PAK ADME S3 2.1 mm i.d. × 100 mm色谱柱,对头孢克肟、头孢他美、阿莫西林的混合对照品和血浆样品进行分析,可得到良好分离。
A number of additives are used in papermaking, from calcium carbonate used as a filler to a variety of minerals and latex added to the surface coating to improve brightness, gloss and printability. The selection of the additive depends on the surface finish required and the final use of the paper. Colored papers require the addition of a pigmenting agent. The particle size of all these materials affects surface finish, color strength, and mechanical properties. Smaller particle size provides a smoother surface and better coverage per unit of additive.