969 resultados para X-rays: general
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UANL
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Esquema de los estudios de los estudios de Ayudantes Técnicos Sanitarios a través de la opción del Bachillerato General Elemental, en cuya base se encuentra la Enseñanza Primaria y la consecución del Certificado de Estudios Primarios. Seguidamente, el Bachillerato General Elemental y el posterior Grado de Bachiller Laboral Elemental. Por último, un periodo de tres años estudiando para ser Ayudante Técnico Sanitario, cuya titulación se conseguiría en torno a los veinte años y para finalmente, obtener el Título de Ayudante Técnico Sanitario.
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Ruthenium(II) complexes with general formula [RuCl3(NO)(P-P)] were obtained in the solid state, where P-P = PPh(2)(CH2)(n)PPh(2) (n = 1-3) and PPh(2)-CH = CH-PPh(2). The P-31 NMR spectra of these compounds measured in CH2Cl2 showed only singlets, consistent with a fac configuration containing two equivalent phosphorus atoms, However the X-ray diffraction data show that the [RuCl3(NO){PPh(2)(CH2)(3)PPh(2)}] complex crystallizes in a met configuration, where one of the phosphorus atoms is trans to the NO group, in a slightly distorted octahedral geometry. Copyright (C) 1996 Elsevier B.V. Ltd
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The origin of cosmic rays at all energies is still uncertain. In this paper, we present and explore an astrophysical scenario to produce cosmic rays with energy ranging from below 10(15) to 3 x 10(20) eV. We show here that just our Galaxy and the radio galaxy Cen A, each with their own galactic cosmic-ray particles but with those from the radio galaxy pushed up in energy by a relativistic shock in the jet emanating from the active black hole, are sufficient to describe the most recent data in the PeV to near ZeV energy range. Data are available over this entire energy range from the KASCADE, KASCADE-Grande, and Pierre Auger Observatory experiments. The energy spectrum calculated here correctly reproduces the measured spectrum beyond the knee and, contrary to widely held expectations, no other extragalactic source population is required to explain the data even at energies far below the general cutoff expected at 6 x 10(19) eV, the Greisen-Zatsepin-Kuz'min turnoff due to interaction with the cosmological microwave background. We present several predictions for the source population, the cosmic-ray composition, and the propagation to Earth which can be tested in the near future.
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Bibliography: p. 28.
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"June 1992."
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"April 1971."
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"March 1993."
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Includes index.
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Includes index.
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Includes index.
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Shipping list no.: 87-335-P (v. 2).
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Shipping list no.: 88-352-P.