963 research outputs found

    A construction of Einstein metrics by warped product

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    On a certain change of Kähler metrics

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    Real hypersurfaces in complex two-plane

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    THE OPHTHALMIC ARTERY ARISING FROM THE MIDDLE MENINGEAL ARTERY

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    The present report describes a case of variation of the ophthalmic artery observed in a 91-year-old Japanese woman at dissection in 1992. It was found that on one side, the ophthalmic artery originate from the middle meningeal artery, and the ophthalmic artery from the internal carotid artery was absent

    Reaction of Fluorine and Carbon and Properties of Their Compounds

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    As the compounds which react with carbon and fluorine possess extremely low surface energies, the formation of the compound on the surface of carbon electrode would cause high overpotential and finally anode effect in fluorine or aluminum cell. Their compounds having the atomic ratio of C : F=1 : 1 are white fine powders and have the properties of good water and oil repellency and lubrication. The present paper is concerned with the reactions of fluorine and six kinds of carbon materials and with the rate determining steps of their reactions. Their properties and structures were studied by means of thermogravimetric and differential thermal analysis, IR and NMR spectra, X-ray diffraction, and the measurements of specific gravity and surface area etc. From these results, there are new compounds containing fluorine atoms between the layers of carbon, where the fluorine atoms are strongly connected to the carbon atoms with covalent bonds, and are very stable to chemicals. Their decomposition temperatures depend upon carbon materials

    Development of liquid scintillator containing 8-quinolinolate indium complex for measurement of low energy solar neutrinos

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    An organic liquid scintillator containing indium complex was studied for a measurement of low energy solar neutrinos. The energy of the emitted electrons from those processes could be transferred to the molecular of complex via the organic solvent molecules, and the luminescence from the indium complex would be detected by the photo-multiplier. Here we report some results obtained by photo-luminescence and the γ\u27s inducedenergy spectra of tris (8-quinolinolate) indium (InQ3) complex. Benzonitrile was chosen as a solvent because of good solubility for the quinolinolate complexes (2wt%) and of good light yield for the scintillation induced by γ\u27s irradiation. The photo-luminescence emission spectra of InQ3 of 30 M solution in benzonitrile was measured. The emission maxima for InQ3 is found at 559 nm as excitation wavelength: 397 nm. We prepared InQ3 (50 mg ~ 200mg) of benzonitrile solutions (20mL). Two secondary scintillators, 100 mg of 2,5-diphenyloxazole (PPO) and 10mg of 1,4- bis[2-(5-phenyloxazolyl)]benzene (POPOP), are also dissolved in above solutions and they play a role of wavelength shifter from the UV region emitted by excited benzonitrile molecules to the visible region emitted by InQ3 complex. The energy spectra of electrons emitted by Compton scattering of incident γ\u27s using 60 Co radio isotope was obtained. These results are the first observation of the γ\u27s energy spectra using luminescent metal complexes
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