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| Registros recuperados: 443 | |
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| Mujica,María Valentina; Mora,Roxana; Rosales,Marlene; Sandoval,Claudio. |
| A vineyard in south-central Chile was surveyed during five growing seasons to analyze the increase over time in the number of plants infected with Grapevine leafroll-associated virus-1, -2 and -3. At the end of the study, GLRaV-3 was found to be the most prevalent virus, with 46% of plants infected by this pathogen. GLRaV-2 infected 13% of plants, and GLRaV-1 infected 12%. Considering all three viruses together, the prevalence of infection increased exponentially from 14% of the plants at the beginning of the study period to 68% at the end. The patterns of the spread of GLRaV-2 and GLRaV-3 were mostly along the rows, whereas the pattern of spread for GLRaV-1 could not be determined. |
| Tipo: Journal article |
Palavras-chave: Field transmission; Grapevine leafroll-associated virus; GLRaV-1; GLRaV-2; GLRaV-3; Virus diagnosis. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100012 |
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| Sotomayor,Carlos; Ruiz,Rafael; Castro,Jorge. |
| Iron deficiency is a major problem that affects many fruit crops grown on calcareous soils. A four-year study was conducted to evaluate the effect of calcareous soils on the vegetative growth and productivity of six peach rootstocks (Nemaguard, Atlas, MRS 2/5, Cadaman, GF 677 and GxN15) grafted with 'Ruby Diamond' nectarines. Trees were planted in 100 L containers filled with a sandy loam textured, calcareous soil (6.3% active calcium carbonate) with a pH of 8.0 and an intermediate level of available iron (5 mg kg-1 of Fe+2). The trunk diameter during the 4th growing season was larger in GF 677, GN 15, Cadaman and Atlas, whereas Nemaguard and MRS 2/5 showed smaller average values. Cadaman and Atlas presented the highest pruning weight (a measure of... |
| Tipo: Journal article |
Palavras-chave: Calcareous soil; Fe+2; Iron chlorosis; Peach rootstock; SPAD. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300013 |
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| Kogan,Marcelo; Gómez,Patricio; Fischer,Albert; Alister,Claudio. |
| The continuously-flooded rice production system in Chile has selected highly competitive aquatic weeds selection capable ofreducing paddy yields by 25 to 50%. Penoxsulam is a broad-spectrum triazolopyrimidine (ALS inhibitor) commercially introduced in Chile in 2006, where Alisma plantago aquatica hads already evolved resistance to sulfonylurea herbicides (SU). Several field trials with water seeded rice were conducted during 2003 and 2004 in Chile to determine efficacy, timing of application, spectrum of control, and control of SU-resistant A. plantago aquatica with the herbicide penoxsulam, either in single applications or in sequence with other herbicides. Penoxsulam was applied a) 12 days after seeding (DAS) into the water (IW), b) in postemergence... |
| Tipo: Journal article |
Palavras-chave: Penoxsulam; Bensulfuron; Metsulfuron; MCPA; Bentazon; Triclopyr; Cyperus difformis; Schoenoplectus mucronatus; Alisma plantago-aquatica; Echinochloa crus-galli; Herbicide-resistance. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100008 |
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| Chebil,S.; Fersi,R.; Bouzid,M.; Quaglino,F.; Chenenaoui,S.; Melki,I.; Durante,G.; Zacchi,E.; Bahri,B. A.; Bianco,P. A.; Rhouma,A.. |
| Abstract Severe decline of mature grapevines has recently been observed in several vineyards in grape regions in northern Tunisia. Between August 2011 and June 2013, wood samples from diseased vines showing dead spur and cordons, shoot dieback associated with sunken necrotic bark lesions and brown to black vascular streaking were collected from numerous diseased vineyards. Several fungal species were isolated from the margin between healthy and symptomatic tissue. Three species of Botryosphaeriaceae, namely, Diplodia seriata, Neofusicoccum australe, and N. vitifusiforme and one species of Diaporthaceae, namely, Diaporthe neotheicola, were observed to be associated with the decline of old vines. Other fungal species were recovered from diseased wood,... |
| Tipo: Journal article |
Palavras-chave: Botryosphaeriaceae; Diaporthaceae; Trunk disease; Virtual RFLP; Vitis vinifera. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000200127 |
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| Aleixandre,José Luis; Bordeu,Edmundo; Aleixandre-Tudó,José Luis; Bolaños,Máxima; Aleixandre-Benavent,Rafael. |
| J.L. Aleixandre, E. Bordeu, J.L. Aleixandre-Tudó, M. Bolaños, and R. Aleixandre-Benavent. 2013. Scientific productivity and collaboration in viticulture and enology in Latin American countries. Cien. Inv. Agr. 40(2): 429-443. The aim of this study was to analyze the scientific activity of Latin American researchers in viticulture and oenology through bibliometric analyses of articles included in the Science Citation Index Expanded database for the period of 2006 to 2010. A total of 917 research articles were published in 364 domestic and international journals. We highlight the important growth in the number of research papers published during the period, especially in Brazil, Argentina and Chile, as well as an increasing number of international... |
| Tipo: Journal article |
Palavras-chave: Impact factor; Latin American countries; Network analysis; Scientific collaboration; Scientific productivity; Viticulture and enology. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200017 |
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| Navarrete Espinoza,Eduardo; Cárcamo Ojeda,Juan; Novoa Barra,Pablo. |
| El estudio se efectuó en tres rodales de "ciprés de la cordillera" (Austrocedrus chilensis) denominados Horno de Barro, Lomas de Toro y Las Animas, en el sector de Maitenrehue (37°30'- 39°37' S; 72°45'- 73°00' O), ubicado en la Cordillera de Nahuelbuta, IX Región de la Araucanía, área que es considerada refugio glacial para muchas especies del bosque chileno. Mediante un análisis de árbol individual y la evaluación de su competencia, se construyeron modelos de crecimiento diametral, con la finalidad de explicar y estimar el crecimiento diametral en función de variables dendrométricas y dasométricas de fácil medición. La información se obtuvo mediante análisis de tallo. Como resultado se presentan modelos de incremento medio anual en diámetro a a altura del... |
| Tipo: Journal article |
Palavras-chave: Ciprés de la cordillera; Competencia específica; Crecimiento individual. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000300009 |
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| Ahmadi,Seyed Mohammad; Siahsar,Barat Ali. |
| In this study, a range of physicochemical properties (dimensions, kernel volume, mass unit, bulk and true densities, porosity, terminal velocity, static friction coefficient against different surfaces, oil content and fatty acids composition) of the Bojnordi and Fakhri cultivars of grape seeds were studied. Fatty acid composition for both cultivars of grape seeds consisted of palmitic, stearic, oleic, linoleic and linolenic acid. The values for palmitic, stearic, oleic, linoleic and linolenic acid for the Bojnordi cultivar were 9.56, 4.37, 22.87, 62.85 and 0.33% and for the Fakhri cultivar were 9.22, 4.33, 19.75, 66.40 and 0.28%, respectively. All physical properties of the grape seed cultivars were significantly affacted by the moisture content in the... |
| Tipo: Journal article |
Palavras-chave: Chemical properties; Fatty acid; Grape seed; Physical properties. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200014 |
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| Gimba,Casmir E; Ocholi,Odike; Egwaikhide,Peter A; Muyiwa,Turoti; Akporhonor,Emmanuel E. |
| Activated carbons were prepared from Khaya senegalensis fruits. Carbonization and activation temperatures were 500°C and 800°C, respectively, at residence time of 5 min for each process. Activating agents were 1M each of NaCI, KCl, CaCl2, MgCl2.6H2O, Na2CO3 K2CO3 H2SO4, and ZnCl2. Particle size was 125 um and adsorption studies were carried out using methylene blue in aqueous solution as adsórbate through fixed beds in micro columns. Equilibrium data were analyzed using adsorption intensity and capacity parameters from the Freundlich isotherms as well as breakthrough curves. Results were compared with performances of commercial animal charcoal and granular activated carbon. The results suggest that K senegalensis fruits are suitable raw matenals for... |
| Tipo: Journal article |
Palavras-chave: Activation; Adsorption; Carbonization; Isotherm Khaya senegalensis. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100010 |
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| Gandarillas,Monica; Matus,José Tomás; Márquez-Hernández,Roberto I; Vargas-Bello-Pérez,Einar. |
| In horses, insulin resistance is associated with several comorbidities such as obesity, laminitis, colic and osteochondrosis. The multifactorial causes of insulin resistance in horses have been addressed, which include genetic and environmental factors. As a consequence of these factors, the cellular signaling pathways responsible for insulin synthesis, the glucose intake in target cells of peripheral tissues and other related processes (e.g., adipocytokine signaling pathways) are affected. In response to insulin, changes in gene expression occur, which are required for the integration of an entire network of metabolic and physiological responses in different organs. The peroxisome proliferator-activated receptors (PPARs) were the particular focus of... |
| Tipo: Journal article |
Palavras-chave: Equine nutrition; Insulin resistance; PPAR-gamma. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200001 |
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| Troncoso,Javier L; Aguirre,Medardo; Manríquez,Paula; Mundigo,Daniel. |
| Se estimó una función hedónica log-lineal de precios, para el mercado internacional de la palta chilena, cultivar Hass. Los datos se obtuvieron de una empresa frutícola ubicada en Quillota, donde se ubican la mayor parte de las plantaciones de paltas de Chile. El precio FOB (en logaritmos) se explicó en función de calibre, mercado de destino y mes de comercialización. Los resultados mostraron que los mercados de destino son muy influyentes en el precio, seguido de los meses de comercialización y, en último término, el calibre. Los mercados europeos y argentinos tienen impactos negativos significativos en el precio en tanto que, con la excepción de Houston, los mercados norteamericanos y Tokio tienen impactos positivos. En cuanto al mes de comercialización,... |
| Tipo: Journal article |
Palavras-chave: Función hedónica de precios; Impacto porcentual; Precio marginal. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000300011 |
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| Zanine,Anderson de M; Vieira,Bruno R; Ferreira,Daniele de J; Vieira,Antônio J. M; Silveira,Márcia C. T. da; Siva,Wilton L. da; Cecon,Paulo R. |
| An experiment was carried out to assess the performance of steers on Brachiaria brizantha and Cynodon dactylon cv. Coast cross pastures by the continuous stocking method with a variable stocking rate. A completely randomized experimental design was used with two pastures representing the treatments, each containing 10 replicates. The results of t-tests demonstrated that the steers grazed for less time (7:19 h) on the B. brizantha grass pasture than the on Coast-cross grass pasture (8:13 h). There was no difference in rumination time from 6:46 and 6:89 h for the B. brizantha and Coast-cross pastures, respectively. There was a significant difference for the values regarding the time that the steers remained idle, and the animals were more frequently idle on... |
| Tipo: Journal article |
Palavras-chave: Cattle; Ethology; Grazing; Idleness. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200012 |
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| Registros recuperados: 443 | |
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