排序方式: 共有53条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
在高速碰撞等试验中经常会遇到几千个g甚至几万个g的冲击环境,对于这样大g值的测量,过去多采用压电型传感器,其中多数是用压电陶瓷作敏感元件,也有用石英晶片。前者会在高g值时出现很大的零漂和滞后现象,有时引起高达40%的误差,且其灵敏度随着g值增大有增大的现象;后者虽然能克服这两个缺点,但灵敏度又很低。 相似文献
10.
Novel polymer system for molecular imprinting polymer against amino acid derivatives 总被引:4,自引:0,他引:4
Molecular imprinting polymers (MIPs) against N-Cbz-L-Tyr were prepared utilizing different polymer systems and evaluated in HPLC mode. It was found that MEP utilizing cocktail functional monomers, acrylamide 2-vinylpyridine showed better molecular recognition and better separation ability for the template molecule than those utilizing other functional monomers. MIP utilizing trimethylolpropane trimethacrylate as cross-linker showed higher load capacity and separation factor than those utilizing ethylene glycol dimethacrylate as cross-linker. Increasing the concentration of competing solvent, acetic acid weakened the ionic interaction and hydrogen bonding between the analyte and the functional monomers, 2-vinylpyridine and acrylamide, when the template enantiomer was separated by HPLC. Therefore increasing of the concentration of acetic acid leads to decreasing of capacity factor, separation factor and resolution. 相似文献