Browsing by Title Facultad de Ciencias
Now showing items 5334-5353 of 8181
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(Elsevier, 2020)Highly sodium deficient Na0.6NbO3 (NN) ceramics were prepared and characterized. Their mean structure could be described by a mixture of the predominant P polymorph (S.G. Pbma) and the Q phase (S.G. P2(1)ma), at room ...
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(Walter de Gruyter, 2016)We report a new locality for the rodent Chelemys megalonyx in Rinconada de Maipu (Santiago, metropolitan region, central Chile), located in the central valley of Chile, in the eastern slope of the Chilean coastal range. ...
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(2014)Two new diterpenes,2-acetoxy-13-hydroxy-mulin-11-ene and 2-acetoxy-mulin-11, 13-diene,have been isolated from the aerial parts of Azorella spinosa and their structures determined by spectroscopic and conventional chemical ...
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(TAYLOR & FRANCIS LTD, 2007-10-23)The family Trimusculidae produce labdane diterpenes, which differ in the degree and type of esterification with acetoxy and isovaleroyl ester, predominantly. In this article, we describe the isolation from the marine ...
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(John Wiley, 2016)Along the south-western coast of South America, three genera of fossil phocids (true seals) have been formally described from the late Neogene: Acrophoca and Piscophoca from Chile and Peru, and, more recently, Hadrokirus ...
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(Servicio Nacional Geología Minerva, 2015)Several Upper Cretaceous plesiosaur specimens recovered from southernmost Chile are described here. These were collected from upper levels of the Dorotea Formation exposed on three different localities (Sierra Baguales, ...
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(Sociedad Chilena de Quimica, 2002)A new route to the electron rich pentamethylcyclopetadienyl iron complexes (n5-C5Me5)=Cp*) starting from the commercially available dimer [Cp*Fe(CO)2]2, is presented. Reaction of the dimer with I2 in CH2Cl2, affords the ...
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(2002)A new species of lizard, belonging to the montanus group of the genus Liolaemus, is described from the northern Chile. The specimens of the new species were collected in February, 1999 at the Farellones de Tara, Loa Province, ...
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(Wolters Kluwer, 2019)
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(MDPI, 2022)Selective regional iron accumulation is a hallmark of several neurodegenerative diseases, including Alzheimer's disease and Parkinson's disease. The underlying mechanisms of neuronal iron dyshomeostasis have been studied, ...
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(Elsevier, 2014)We describe a new specimen of an elasmosaurid plesiosaur from the upper Maastrichtian of central Chile. The specimen includes a relatively complete dorso-caudal series, a few cervical vertebrae, and a fragmentary pelvic ...
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(2000)The products 3-hydroxy-1,4-benzoxazin-2-one (5) and 5-nitro-2-aminophenol were isolated from the decomposition reaction of the title compounds in aqueous solutions. Two mechanisms are proposed for the formation of these products.
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(Kluwer Academic Publishers, 2015)© 2015, Sociedade Entomológica do Brasil. The geographic distribution of the red cricket Cratomelus meritus Gorochov had remained unknown until now due to mislabeling and lack of new records. The aim of this short communication ...
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(Kluwer Academic Publishers-Plenum Publishers, 1994)Three new dihydro-β-agarofuran sesquiterpenes from two species of Maytenus were isolated and their structures were elucidated by means of1H and13C NMR studies. The differences and similarities noted in the chemical content ...
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(2008)Three Latin American oilseeds obtained from native fruits: nopal (tuna) (Opuntia ficus-indica), cherimoya (chirimoya) (Annona cherimola), and papaya, Chilean variety (Carica pubescens or C. candamarcensis) were studied for ...
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(Magnolia Press, 2015)Based on morphological and molecular evidence (mitochondrial and nuclear sequences) we describe a new species of spiny-chest frog, Alsodes cantillanensis, from central Chile (around 34 degrees S). The type locality, Quebrada ...
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(Magnolia Press, 2015)Callyntra Solier, 1836 is a genus mainly from Chile, with one species occurring in Argentina, which currently contains 20 described species. Recent explorations in the Andes Mountain Range in Chile, have resulted in the ...