Bestimmung des Harzes in den Harzseifen

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Characterization and cytotoxicity studies of thiol‐modified polystyrene microbeads doped with [{Mo6X8}(NO3)6]2– (X = Cl,Br, I)

Halide octahedral molybdenum clusters [{Mo₆X₈}L₆]^n– possess luminescence properties that are highly promising for biological applications. These properties are rather dependent on the nature of both the inner ligands X (i.e. Cl, Br, or I) and the apical organic or inorganic ligands L. Herein, the luminescence properties and the toxicity of thiol‐modified polystyrene microbeads (PS‐SH) doped with [{Mo₆X₈}(NO₃)₆]^2– (X = Cl, Br, I) were studied and evaluated using human epidermoid larynx carcinoma (Hep2) cell cultures. According to our data, the photoluminescence quantum yield of {Mo₆I₈}@PS‐SH is significantly higher (0.04) than that of {Mo₆Cl₈}@PS‐SH (<0.005) and {Mo₆Br₈}@PS‐SH (<0.005). Treatment of Hep2 cells with {Mo₆X₈}@PS‐SH showed that all three types of doped microbeads had no significant effect on the viability and proliferation of the cells. Copyright © 2016 John Wiley & Sons, Ltd.     

Der Nachweis von Blut nach Teichmann

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On Brillouin Zones

: Brillouin zones were introduced by Brillouin [Br] in the thirties to describe quantum mechanical properties of crystals, that is, in a lattice in Âⁿ. They play an important role in solid-state physics. It was shown by Bieberbach [Bi] that Brillouin zones tile the underlying space and that each zone has the same area. We generalize the notion of Brillouin zones to apply to an arbitrary discrete set in a proper metric space, and show that analogs of Bieberbach's results hold in this context. We then use these ideas to discuss focusing of geodesics in spaces of constant curvature. In the particular case of the Riemann surfaces ¸²/o (k) &nspace;(k= 2,3, or 5), we explicitly count the number of geodesics of length t that connect the point i to itself.     

Rapid purification and scale-up of honokiol and magnolol using high-capacity high-speed counter-current chromatography

In this paper, a rapid separation approach has been developed using high-capacity high-speed counter-current chromatography (high-capacity HSCCC) to isolate and purify honokiol and magnolol, which are the main bioactive constituents from Houpu. The optimization of the solvent selection process, sample loading volume and flow rate is systematically studied using analytical high-capacity HSCCC. The optimized parameters obtained rapidly at analytical scale were used for a 1000 x scale-up preparative run using pilot scale high-capacity HSCCC in a MAXI-DE centrifuge. A crude sample of 43 g was successfully separated and the fractions were analysed by high-performance liquid chromatography (HPLC). This large scale preparative single step run yielded 16.9 and 19.4 g of honokiol and magnolol with purities of 98.6 and 99.9%, in only 20 min. This is the first time that high-performance counter-current chromatography has been used to purify multiple gram grade bioactive compounds in less than 1h and at such high concentrations of final products (10.8 g/l for magnolol and 7.0 g/l for honokiol).     

连续波锁模P_r~（3＋）：YLF激光器

本文报导了采用氩离子激光器来泵浦Ｒｒ￣（３＋）：ＹＬＦ晶体，应用声光调制器实现了主动锁模；同时应用振动─高反射平面镜也实现了被动锁模，两种锁模均得到了ｐｓ光脉冲。据作者了解这是这种晶体材料的第一次锁模运转。