Ion and electron heating characteristics of magnetic reconnection in a two flux loop merging experiment

Characteristics of the high-power reconnection heating were measured for the first time directly by two-dimensional measurements of ion and electron temperatures. While electrons are heated mainly inside the current sheet by the Ohmic heating power, ions are heated mainly by fast shock or viscosity damping of the reconnection outflow in the two downstream areas. The magnetic reconnection converts the energy of reconnecting magnetic field B(p) mostly to the ion thermal energy, indicating that the reconnection heating energy is proportional to B(p)(2).     

微波消解ICP-MS测定唐古特乌头中的多种微量元素

采用HNO3-H2O2混合酸体系微波消解及电感耦合等离子体-质谱法,消解唐古特乌头样品,测定其中Mn、Fe、Co、As、Ni、Se、Cu、Zn、V和Cr共10种微量元素。探讨了样品消解的条件,通过加标回收实验,回收率为94.08%—103.50%,验证了分析数据的可靠性。结果表明,该法具有快速、简便、准确度高、能同时分析多元素的优点,结果令人满意。     

Model reduction and submodelling using neural networks

An (artificial) neural network to simulate the structural behaviour of a cluster of finite elements is proposed. (© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)     

ChemInform Abstract: Formation and Stability of the Gaseous Species LiAlCl4, Li2AlCl5 and LiAl2Cl7 — Mass Spectrometric and Quantum Chemical Studies.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

Preparation of tetra-n-butylammonium peroxydisulfate. Novel tetrahydrofuranylation [1] and tetrahydropyranylation of alcohols

Tetra-n-butylammonium peroxydisulfate (Bu₄N^{+ −}OS(O₂)O–O(O₂)SO^{− +}NBu₄: (TBA)₂S₂O₈) has been successfully prepared and turned out to be a useful source of the tetra-n-butylammonium sulfate radical in organic solvents. Primary, secondary, and tertiary alcohols containing functional groups, such as benzylic, allylic, and sulfide, reacted with tetrahydrofuran or tetrahydropyran in the presence of (TBA)₂S₂O₈ to give the corresponding 2-tetrahydrofuranyl- or 2-tetrahydropyranyl-ether in excellent yields under nearly neutral conditions.     

ChemInform Abstract: Formation and Stability of Gaseous WS2Cl2, WS2Br2 and WS2I2 — A Combined Experimental and Theoretical Study.

The reactions of solid WS₂ with gaseous Cl₂, Br₂ and I₂ are monitored by mass spectrometry.