Browsing by Title Facultad de Ciencias
Now showing items 4753-4772 of 8176
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(Sociedade Brasileira de Quimica, 2005)A systematic study about the long-range correlations observed in the HMBC spectra of a series of cis and trans 3-(4-oxo-4H-chromen-3-yl)-acrylic acid ethyl esters, and 5-hydroxy derivatives, was carried out. The results ...
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(2007)Long-term intermittent hypoxia, characterized by several days or weeks at altitude with periodic stays at sea level, is a frequently occurring pattern of life in mountainous countries demanding a good state of physical ...
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(AMER PHYSICAL SOC, 2010-04-05)We report the measurement of the longitudinal magnetoresistance, performed on 4 thin gold films of different thickness evaporated onto preheated mica, where the signal can be univocally attributed to electron-surface scattering. ...
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(1981)In three experiments a total of 23 sham‐operated and 63 brain‐lesioned killifish were maintained for 12½–16½ weeks under constant environmental conditions, with regular feeding. Regression of the testes and pituitary ...
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(Elsevier, 2016)Land use change can reduce the wealth and wellbeing of a nation by modifying its biodiversity. We used value transfer methodology to estimate changes in the value of ecosystem services provided by natural ecosystems in El ...
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(AMER SOC MICROBIOLOGY, 2008-12)Fusarium verticillioides (Gibberella fujikuroi mating population A [MP-A]) is a widespread pathogen on maize and is well-known for producing fumonisins, mycotoxins that cause severe disease in animals and humans. The species ...
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(Springer, 2015)The evolution of the marine benthic fauna of Antarctica has been shaped by geological and climatic atmospheric factors such as the geographic isolation of the continent and the subsequent installation of the Antarctic ...
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(2014)The evolution of the marine benthic fauna of Antarctica has been shaped by geological and climatic atmospheric factors such as the geographic isolation of the continent and the subsequent installation of the ...
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(Springer, 2013)Background: The Mediterranean zone of central Chile (30° to 38°S) is one of the 25 diversity hotspots in the world. However, there are few phylogeographic studies which identify the factors that have influenced ...
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(MDPI AG, 2017)Single-layer, ultrasmall ReS2 nanoplates embedded in amorphous carbon were synthesized from a hydrothermal treatment involving ammonium perrhenate, thiourea, tetraoctylammonium bromide, and further annealing. The rhenium ...
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(WILEY-V C H VERLAG GMBH, 2008-07)Both low-dimensional bar-coded metal oxide layers, which exhibit molecular hinging, and free-standing organic nanostructures can be obtained from unique nanofibers of vanadium oxide (VOx). The nanofibers are successfully ...
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(Universidad de Chile, 1996)
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(Universidad de Chile, 2009)Mejoramos las cotas inferiores de Odlyzko para conductores de Artin. Comenzamos adaptando los métodos de odlyzko al lenguaje de las formulas explícitas. Esto da una primera mejora a los resultados de Odlyzko. Después ...
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(Centro de Regulación del Genoma, 2018)La publicación profundiza sobre uno de los grandes desafíos de la ciencia actual: la posibilidad de modificar los organismos desde su base. Desarrolla temas como la caracterización del ADN, la secuenciación genómica, las ...
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(Universidad de Chile, 2007)
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(ACS publications, 2014)Gold and silver complexes containing the monophosphane 1-PPh2-2-Me-l,2-C2B10H10 with different coordination numbers (2, 3) have been synthesized: [M(7,8-(PPh2)2-C2B9H10)(1-PPh2-2-Me- C2B10H10)] (M = Ag, Au) and ...
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(2007)Clay minerals, and within these, the smectite group, including the hectorites in focus, possess layered structures, in which interlayer chemistry may be applied to functionalize them optically. While luminescence from ...
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(1986)The UV absorption and fluorescence soectral bands of 2-benzoxazolinone and 6-methoxy-2-benzoxazolinone have been recorded in solution at room temperature. The phosphorescence spectral bands, their Quantum yields and mean ...