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| Chamorro,Soledad; Xavier,Claudia Regina; Hernández,Victor; Becerra,José; Vidal,Gladys. |
| Kraft mill effluent, due to its organic matter content and acute toxicity, must be treated. A primary treatment followed by a secondary treatment is the most common system. Aerated lagoon is also considered an effective biological treatment, although this technology has some drawbacks related with operation parameters and land extension space. Moreover, the recovery efficiency for micropollutants contained in kraft mill effluent is questioned due to the anoxic zone in the system. The goal of this work is to evaluate the performance of the aerated lagoon to remove stigmasterol contained in kraft mill effluents. Kraft mill effluent was treated by an aerated lagoon (AL), which was operated with three different stigmasterol load rates (SLR = 0.2, 0.6 and 1.1... |
| Tipo: Journal article |
Palavras-chave: Aerated lagoon; Kraft mill effluent; Stigmasterol. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000200001 |
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| Bittner,Magalis; Aguilera,Milenko A; Hernández,Víctor; Arbert,Cecilia; Becerra,José; Casanueva,María E. |
| Components of essential oils from the Chilean Monimiaceae, boldo (Peumus boldus Mol.), tepa (Laureliopsis philippiana (Looser) Schodde), and laurel (Laurelia sempervirens (Ruiz & Pav.) Tul.) were determined using Gas Chromatography- Mass Spectrometry (GCMS) and fungistatic activity of the essential oils was tested against Rhizoctonia solani Kühn (Donk), Pythium irregulare Buisman, Ceratocystis pilifera (Fr.) C. Moreau, Phragmidium violaceum (Schultz) G. Winter, and Fusarium oxysporum Schltdl. The essential oils of the Monimiaceae species shared some common components; all three had the 3-carene, α-phellandrene, and α-pinene terpenes. L. philippiana and L. sempervirens also had safrole.The main components were ascaridol in P.... |
| Tipo: Journal article |
Palavras-chave: Chilean native trees; Chemical components; Natural fungistatic activity; In vitro analysis. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100004 |
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| González,Paola; Oyarzún,Ciro; Becerra,José. |
| Pinguipes chilensis presenta un comportamiento alimentario y reproductivo que comprende todo el año, en donde índices de condición como Indice Hepatosomático y Factor de Condición no se relacionan con la madurez de las gónadas, indicando una posible independencia de la energía almacenada como lípidos en la musculatura y en el hígado con el proceso reproductivo. El presente trabajo determina el contenido de lípidos totales (%) en la musculatura de P. chilensis, y su variación entre zonas del cuerpo, así como diferencias entre sexos y ontogenéticas. En hembras (n=12) y machos (n=11) capturados en el litoral de Talcahuano, Chile, se determinó el contenido de lípidos totales mediante la Técnica Gravimétrica de extracción por Soxhlet, de tejido muscular desde... |
| Tipo: Journal article |
Palavras-chave: Lípidos; Pinguipes chilensis; Chile. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382005000100018 |
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| Ruiz,Eduardo; Toro,Oscar; Crawford,Daniel J; Stuessy,Tod F; Negritto,María A; Baeza,Carlos; Becerra,José. |
| Phylogenetic relationships among Chilean species of Drimys as well asD. granadensis from Central America andD. angustifolia from Brazil were reconstructed using internal transcribed spacers (ITS) of nuclear ribosomal DNA and a parsimony analysis. Our results at the family level were congruent with previous phylogenetic hypotheses. Molecular data indicate that the Juan Fernandez Island endemic D. confertifolia diverged early in the evolution of the genus, and it is not closely related to the continental species D. winteri, as might be expected on the basis of morphology and biogeography. The ITS phytogeny also provides general support for a recent distribution of species on the western side of the Andes Mountains; the only exception is D. andina, which may... |
| Tipo: Journal article |
Palavras-chave: Drimys; Evolution; ITS; Indels; Winteraceae. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432008000200008 |
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