Browsing by Title Facultad de Ciencias Físicas y Matemáticas
Now showing items 1-20 of 20782
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(1995)The crystal structure of the title phosphonium salt consists of a tetrahedral (C6Hs)P +C(C4HS)- (COOCH2CH3) cation and a Br- anion. The triphenylphosphonium group has P---C(phenyl) distances which are equal within ...
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(BLACKWELL PUBLISHING, 2006-05)Molecules in the title crystal structure, C20H24O4, are linked into chains of R-4(4)(8) rings along [010] and these chains are linked into sheets via weak C-H center dot center dot center dot pi(arene) interactions. These ...
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(Universidad de Chile, 2022)Las instituciones de educación superior, y en particular las universidades altamente selectivas, han promovido cambios sustantivos en la admisión a sus programas y carreras de pregrado durante los últimos diez años, a ...
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(Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Escuela de Ingeniería y Ciencias, 2017-07)
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(Elsevier, 2020)In this study, amorphous carbon buffer layer containing nano-crystalline diamond grains was pre-deposited on single crystal silicon (Si) wafers. (100) oriented diamond films were prepared on the buffer layer by increasing ...
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(Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas, 2023)Presenta el aniversario no. 150 de la carrera Ingeniería Civil de la Universidad de Chile, mencionando las actividades realizadas.
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(Springer, 2009)At times when attention on climate issues is strongly focused on the assessment of potential impacts of future climate change due to the intensification of the planetary greenhouse effect, it is perhaps pertinent to look ...
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(AMER INST PHYSICS, 1993-12)We have started a search for supernovae as a collaboration between the University of Chile and the Cerro Tololo Inter-American Observatory, with the aim of producing a moderately distant (0.01 < z < 0.10) sample of Type ...
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(BLACKWELL PUBLISHING, 2008-06)The structure of the title compound, (C10H10N3)(2)[ZnCl4], is composed of C10H9N3H+ ( DPAH(+)) cations and [ ZnCl4](2-) anions. The two pyridyl rings of DPAH+ are approximately coplanar, with a dihedral angle of 7.2 ( ...
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(IOP Publishing, 2015)A major goal of the Atacama Large Millimeter/submillimeter Array (ALMA) is to make accurate images with resolutions of tens of milliarcseconds, which at submillimeter (submm) wavelengths requires baselines up to similar ...
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(American Geophysical Union, 2017)In April 2017, a sequence of earthquakes offshore Valparaiso, Chile, raised concerns of a potential megathrust earthquake in the near future. The largest event in the 2017 sequence was a M6.9 on 24 April, seemingly colocated ...
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(IEEE, 2015)This special number of the IEEE Latin America Transactions includes a selection of the best papers presented at the 20th Conference of the Collaboration Researchers International Working Group, which took place in Santiago ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2008-10)Marine oxygen-deficient environments with high sedimentation rates and high primary productivity can provide relevant information regarding variations of ocean–climatic conditions in the past. In the Humboldt current ...
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(Springer, 2020)Continuously increasing global population and, therefore, energy consumption as well as diminishing resources combined with environmental aspects such as global warming ask for more efficient, sustainable and reliable ...
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(The American Astronomical Society, 2013-01)We present parallax and proper motion measurements, near-infrared spectra, and Wide-field Infrared Survey Explorer photometry for the low surface gravity L5γ dwarf 2MASS J035523.37+113343.7 (2M0355). We use these data ...
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(Universidad de Chile, 2019)El k-coloreo de vértices de un grafo es un ya conocido problema NP-completo, debido a esto, los esfuerzos se han concentrado en estudiar el problema restringido a ciertas clases de grafos, para intentar resolverlo en ...
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(International Solar Energy Society, 2020)
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(Elsevier Inc., 2019)Photosensitized reactions mediated by endogenous chromophores have been associated with the etiology of age-related cataract disease. Endogenous chromophores such as 3-hydroxykynurenine (3OHKN) can be found in both free ...
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(Cornell University, 2015)We release the next installment of the Stripe 82 X-ray survey point-source catalog, which currently covers 31.3 deg2 of the Sloan Digital Sky Survey (SDSS) Stripe 82 Legacy field. In total, 6181 unique X-ray sources are ...
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(Institute of Electrical and Electronics Engineers Inc., 2020)