780 research outputs found
Über die Wirkung des Rivanols bei septischen Krankheiten, wenn intravenös injiziert
Es ist praktisch erwiesen, dass das Rivanol als Tiefenantisepticum von günstiger Wirkung ist. In letzter Zeit wird es auch als intravenöse Injektion angewandt. Auch ich habe den therapeutischen Wert der intravenösen Injektion des Rivanols festgestellt. Ich habe diesen Injektionen 0.1% Losungen des Rivanols benützt und zwar gewöhnlich an einem Tage 50ccm und als gesammt Dosis eine Menge von 100-800ccm, durchschnittlich 275ccm. Zur Herabsenkung des Fiebers bedürfte es eines Zeitverlaufes von 3-8, durchschnittlich 5, 7 Tagen. Um die Blutinfektion negativ zu gestalten, bedarf es eines Zeitverlaufes von 4-18, durchschnittlich 8 Tagen. Ich habe weiterhin in Tierversuchen die Wirkungsweise des Rivanols bei septischen Krankheiten, wenn intravenös injiziert, festzustellen versucht. d. h. Ich habe bei Kaninchen Staphylokokkensepsis hervorgerufen und darauf die Veränderungen des Retikuloendothelial-Systems durch Rivanol-injektionen festgestellt.
Aus meinen Untersuchungen scheint hervorzugehen, dass die intravöse Injektion von Rivanol bei septischen Krankheiten seine Wirkungsweise nicht indirekt durch eine Wirkung auf die körperschutzenden Organe, sondern vielmehr eine direkt bakteritide ist
Pressure Tuning of an Ionic Insulator into a Heavy Electron Metal: An Infrared Study of YbS
Optical conductivity [] of YbS has been measured under
pressure up to 20 GPa. Below 8 GPa, is low since YbS is an
insulator with an energy gap between fully occupied 4 state and unoccupied
conduction () band. Above 8 GPa, however, increases
dramatically, developing a Drude component due to heavy carriers and
characteristic infrared peaks. It is shown that increasing pressure has caused
an energy overlap and hybridization between the band and 4 state, thus
driving the initially ionic and insulating YbS into a correlated metal with
heavy carriers
Optical Conductivity and Electronic Structure of CeRu4Sb12 under High Pressure
Optical conductivity [s(w)] of Ce-filled skutterudite CeRu4Sb12 has been
measured at high pressure to 8 GPa and at low temperature, to probe the
pressure evolution of its electronic structures. At ambient pressure, a
mid-infrared peak at 0.1 eV was formed in s(w) at low temperature, and the
spectral weight below 0.1 eV was strongly suppressed, due to a hybridization of
the f electron and conduction electron states. With increasing external
pressure, the mid-infrared peak shifts to higher energy, and the spectral
weight below the peak was further depleted. The obtained spectral data are
analyzed in comparison with band calculation result and other reported physical
properties. It is shown that the electronic structure of CeRu4Sb12 becomes
similar to that of a narrow-gap semiconductor under external pressure.Comment: 8 pages, 9 figure
Universal scaling in the dynamical conductivity of heavy fermion Ce and Yb compounds
Dynamical conductivity spectra s(w) have been measured for a diverse range of
heavy-fermion (HF) Ce and Yb compounds. A characteristic excitation peak has
been observed in the mid-infrared region of s(w) for all the compounds, and has
been analyzed in terms of a simple model based on conduction (c)-f electron
hybridized band. A universal scaling is found between the observed peak
energies and the estimated c-f hybridization strengths of these HF compounds.
This scaling demonstrates that the model of c-f hybridized band can generally
and quantitatively describe the charge excitation spectra of a wide range of HF
compounds.Comment: 5 pages, 1 table, 3 figures, to appear in J. Phys. Soc. Jpn. 76
(2007
Temperature-Dependence of Magnetically-Active Charge Excitations in Magnetite across the Verwey Transition
We have studied the electronic structure of bulk single crystals and
epitaxial films of magnetite FeO. Fe core-level spectra show clear
differences between hard x-ray (HAX-) and soft x-ray (SX-) photoemission
spectroscopy (PES), indicative of surface effects. The bulk-sensitive spectra
exhibit temperature ()-dependent charge excitations across the Verwey
transition at =122 K, which is missing in the surface-sensitive spectra.
An extended impurity Anderson model full-multiplet analysis reveals roles of
the three distinct Fe-species (A-Fe, B-Fe, B-Fe) below
for the Fe spectra, and its dependent evolution. The Fe
HAXPES spectra show a clear magnetic circular dichroism (MCD) in the metallic
phase of magnetized 100-nm-thick films. The model calculations also reproduce
the MCD and identify the magnetically distinct sites associated with the charge
excitations. Valence band HAXPES shows finite density of states at for
the polaronic metal with remnant order above , and a clear gap formation
below . The results indicate that the Verwey transition is driven by
changes in the strongly correlated and magnetically active B-Fe and
B-Fe electronic states, consistent with resistivity and bulk-sensitive
optical spectra.Comment: 5 pages, 4 figures Accepted in Physical Review Letter
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