形变Schrédinger-Virasoro 代数的非退化对称不变双线性型

本文确定了形变Schrödinger-Virasoro 代数的非退化对称不变双线性型, 并借助此类Lie 代数上的二上同调群, 确定了相应的Leibniz 二上同调群.     

发现难以捉摸的五夸克态

包括质子在内的重子由3 个夸克组成,而介子则由一对正反夸克组成。可否由若干夸克和反夸克构成其他形态的粒子？这一问题很难从理论角度回答。然而,欧洲核子研究中心LHCb 合作组报道了这类粒子中的最新一例：以前从未见过的五夸克态粒子,其组分包含构成质子的夸克和一对正反粲夸克。探测到这个粒子看起来有点诧异：虽然五夸克态的存在不会导致修改粒子物理标准模型,但是早先搜索较轻夸克组成的五夸克态要么落空要么不能实验重复。通过研究这一新的夸克态,物理学家可更好地认识束缚态夸克之间复杂的作用力。     

Eine neue Art von Stativringen

Ohne Zusammenfassung     

Portable capillary LC for in-line UV monitoring and MS detection: Comparable sensitivity and much lower solvent consumption

Pharmaceutical development currently relies on quality separation methods from early discovery through to line-of-site manufacturing. There have been significant advancements made regarding the column particle packing, internal diameter, length connectivity, the understanding of the impact key parameters like void volume, flow rate, and temperature all that affects the resultant separation quality, that is, resolution, peak shape, peak width, run time, and signal-to-noise ratio. There is however a strong need to establish better alternatives to large bulky high-performance liquid chromatography racks either for process analytical reaction monitoring or mass spectrometry analysis in establishing product quality. Compact, portable high-pressure liquid chromatography can be a more efficient alternative to traditional ultra-high pressure liquid chromatography and traditional liquid chromatography. The compact versatile instrument evaluated here allows good separation control with either the on-board column with fixed ultra-violet wavelength cartridge or for use with a high-resolution mass spectrometry. Significant space reduction results in greener lab spaces with improved energy efficiency for smaller labs with lower energy demands. In addition, this compact liquid chromatography was used as a portable reaction monitoring solution to compare forced degradation kinetics and assess portable liquid chromatography-mass spectrometry capability for the analyses required for pharmaceutical drug product testing.