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| Laurie,V. Felipe; Villagra,Evelyn; Tapia,Jaime; Sarkis,Jorge E. S; Hortellani,Marcos A. |
| A set of 75 wine samples from seven of the major wine producing regions in Chile were analyzed with flame atomic absorption spectroscopy (AAS) to determine their content of major metallic elements (K, Mg, Ca, Na, Fe and Zn). The results obtained were further analyzed with principal component analysis (PCA) in an attempt to loosely discriminate these wines according to grape type and geographical origin. The metal concentrations measured were within normal ranges, according to previously published data from other wine producing countries. Multivariate statistics allowed the possibility to reasonably discriminate between red and white wines, and to show a distinctive pattern of Na concentration, with higher total contents for the wines produced in the... |
| Tipo: Journal article |
Palavras-chave: Wine; Metal; AAS; Multivariate analysis. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200008 |
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| Peña-Cortés,Fernando; Rebolledo,Gonzalo; Hermosilla,Katherine; Hauenstein,Enrique; Bertrán,Carlos; Schlatter,Roberto; Tapia,Jaime. |
| Se analizó la dinámica del paisaje por medio de la variación en las superficies de distintos usos y coberturas de suelo y su tasa de cambio, utilizando mapas categóricos elaborados de la fotointerpretación de imágenes de vuelos de los años 1980, 1994 y 2004, donde se identificaron ocho tipologías en el paisaje. A su vez se evaluó la variación en los patrones del paisaje aplicando 21 métricas relacionadas a la tipología y superficie, bordes, formas, diversidad, agregación y yuxtaposición, como indicadores de la dinámica y evolución del paisaje. Se observó un aumento significativo en la superficie de humedales ribereños (3039.7 ha en 1980 a 4384.8 ha en 2004), una disminución en la superficie del espejo de agua y un aumento de las plantaciones forestales a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Paisaje; Patrones del paisaje; Planificación ecológica; Conservación de humedales; Cambio de uso. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2006000200009 |
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| Villegas,Cinthya M; Verdugo,Jaime A; Grez,Audrey A; Tapia,Jaime; Lavandero,Blas. |
| C.M. Villegas, J.A. Verdugo, A.A. Grez, J. Tapia, and B. Lavandero. 2013. Movement between crops and weeds: temporal refuges for aphidophagous insects in Central Chile. Cien. Inv. Agr. 40(2): 317-326. Crop edges have significant effects on populations of natural enemies, acting as source or sink habitats during the growing season. Previous observations have shown that coccinellid species are associated with thistle (Sylibum marianum (L.) Gaertn), a common exotic weed in the central valley of Chile. To determine whether thistles growing at crop edges act as a putative refuge for natural enemies, the seasonal relative abundance of aphidophagous coccinellids was estimated at 0, 10 and 25 m from the edges of three alfalfa fields. Mark-recapture studies were... |
| Tipo: Journal article |
Palavras-chave: Alfalfa; Coccinellids; Refuges; Rubidium; Thistle. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200007 |
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