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Gustav Kolbe 《Fresenius' Journal of Analytical Chemistry》1909,48(3):185-186
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An experiment is described where a bright luminescence of a razor‐blade from an electric razor can be generated even by a 4, 5 Volt battery. The luminescence is not produced by the metal itself but by solution particles in its immediate vicinity. This conversion of electrical energy into light is explained and the influence of different parameters on the quantum yield is discussed. By this simple and appealing experiment instructors are encouraged to introduce topics of modern research and technology into the curriculum. 相似文献
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R. Helmers 《Fresenius' Journal of Analytical Chemistry》1956,150(2):124-125
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Stüpel, H., und A. Segesser: Fette u. Seifen 53, 260, 327 (1951); R. Wickbold: Fette u. Seifen. 54, 394 (1952); vgl. diese Z. 137, 397 (1952/53); 139, 454 (1953). 相似文献
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C. W. Zenger 《Fresenius' Journal of Analytical Chemistry》1862,1(1):394-396
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The First Oxogallate with Chains of Tetrahedra For the first time K2Na4[(GaO3)2] was obtained by annealing intimate mixtures of the binary oxides (K:Na:Ga = 4.4:2.2:1, Ag-cylinder, 600°C, 25 d). The structure elucidation (four-circle diffractometer, MoKα, 506 of 650 Io(hkl); R = 8.16%, Rw = 4.43%) confirms the space group Pnma with a = 651.5(1), b = 613.2(1), c = 1024.5(1) pm, Z = 2 (Guinier-Simon-photographs). Essential part of the structure is the ?Zweier-Einfach-Kette”? [(GaO(1)1/1 O(3)1/1O(2)2/2)2]. Despite different space groups the structural similarity with Rb2Na4[(FeO3)2] is obvious. 相似文献
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Ohne ZusammenfassungMit 1 AbbildungSonderdrucke durch Frau Ida Pirsch, A-1180 Wien, Littrowg. 1. 相似文献