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Aerobic removal of stigmasterol contained in kraft mill effluents Electron. J. Biotechnol.
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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Caracterización fisiológica del enraizamiento in vitro de Eucalyptus nitens y Eucalyptus globulus Gayana Botánica
Jofré,María Paz; Ríos,Darcy; Becerra,José; Sánchez-Olate,Manuel.
RESUMEN El entendimiento de los cambios bioquímicos que ocurren durante las distintas fases del enraizamiento hace posible obtener mayor porcentaje de enraizamiento de microbrotes en especies leñosas. Para diferenciar ambas especies y encontrar un marcador de la capacidad rizogénica, en el presente estudio se pretende caracterizar perfiles cinéticos de Ácido Indol Acético (AIA), Fenoles totales y Carbohidratos totales. Para esto se evaluaron microtallos de las especies Eucalyptus nitens (H. Deane & Maiden) Maiden y Eucalyptus globulus Labill. las cuales fueron tratadas con el método de la inducción lenta del enraizamiento en medio de cultivo Murashige & Skoog (1962) (MS) con las sales a la mitad, 30 g/L de sacarosa, suplementado con Ácido Naftalen...
Tipo: Journal article Palavras-chave: Flavonoides; Acido Indol Acético; Enraizamiento adventicio.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432016000200421
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Fungistatic Activity Of Essential Oils Extracted from Peumus boldus Mol., Laureliopsis philippiana (Looser) Schodde and Laurelia sempervirens (Ruiz & Pav.) Tul. (Chilean Monimiaceae) Chilean J. Agric. Res.
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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Is autotoxicity responsible for inhibition growth of new conspecific seedlings under the canopy of the invasive Acacia dealbata Link? Gayana Botánica
Aguilera,Narciso; Guedes,Lubia M.; Becerra,José; González,Luis.
ABSTRACT Autotoxicity is a particular form of allelopathy and is suspected to be responsible for regulating intraspecific competition under the Acacia dealbata Link (Fabaceae) canopy. Was established a bioassay with controlled conditions following the natural patterns of plant material accumulation under the A. dealbata canopy to determine the effects of chemical compounds released by leaves, bark, flowers and pods of the invasive species on germination and early growth of conspecific seedlings. Morphological changes caused by A. dealbata plant parts in roots of A. dealbata seedlings grown in natural and controlled conditions were evaluated with scanning electron microscopy. The composition and behavior of the phytotoxicity of litter under the A. dealbata...
Tipo: Journal article Palavras-chave: Allelopathy; Allelochemicals; Biological invasions; Intraspecific competition; Morphological changes; Non- native range.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432017000100001
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LIPIDOS TOTALES EN LA MUSCULATURA DE PINGUIPES CHILENSIS VALENCIENNES 1833 (PERCIFORMES, PINGUIPEDIDAE) Gayana
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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Osteogenic molecules for clinical applications: improving the BMP-collagen system Biol. Res.
Arrabal,Pilar M; Visser,Rick; Santos-Ruiz,Leonor; Becerra,José; Cifuentes,Manuel.
Among the osteogenic growth factors used for bone tissue engineering, bone morphogenetic proteins (BMPs) are the most extensively studied for use in orthopaedic surgery. BMP-2 and BMP-7 have been widely investigated for developing therapeutic strategies and are the only two approved for use in several clinical applications. Due to the chemical and biological characteristics of these molecules, their authorised uses are always in combination with a carrier based on collagen type I. Although the use of these growth factors is considered safe in the short term, the very high doses needed to obtain significant osteoinduction make these treatments expensive and their long-term safety uncertain, since they are highly pleiotropic and have the capacity to induce...
Tipo: Journal article Palavras-chave: BMPs; Collagen; FGF-2; Growth factors; Osteogenesis; Recombinant proteins; RGD peptide.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000400013
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PHYLOGENETIC RELATIONSHIPS AMONG CHILEAN SPECIES OF DRIMYS (WTNTERACEAE) BASED ON ITS SEQUENCES AND INSERTION/DELETION EVENTS Gayana Botánica
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
Registros recuperados: 7
Primeira ... 1 ... Última
 

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