|
|
|
| Registros recuperados: 7.826 | |
|
|
| Silva,Aderbal M. de A; Alves,Simone V; Bezerra,Leilson R; Carneiro,Heloisa; Oliveira,Ronaldo L; Medeiros,Fabíola F. de; Filho,José M. Pereira; Araújo,Dário R. C. de. |
| The objective of this research was to evaluate the in vitro degradability and gas production from different byproducts of the domestic biodiesel industry (Glycine max, Brassica napus L., Helianthus annuus and Raphanus sativus L.) using four increasing levels (0, 30, 50 and 70%) of replacement of Pennisetum purpureum. The inoculum for the in vitro incubations was obtained from three Holstein cows with rumen fistulas. Gas production was measured at 3, 6, 12, 24 and 48 hours of incubation. The experimental design was a completely randomized 4 × 4 factorial arrangement, with byproducts and their levels being the factors. The results showed a significant effect (P ≤ 0.05) of all byproducts. A higher level of degradation was observed following 48 hours... |
| Tipo: Journal article |
Palavras-chave: Brassica napus L; Helianthus annuus; Nutrition; Raphanus sativus L; Ruminants. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200014 |
| |
|
|
| López,Liliana; Santamaría,Johanna; Sánchez,Alexandra; Castro,Lida; Moreno,Jessica L. |
| This study assessed the presence of tetracycline-resistant bacteria in five different grassland-based production systems dedicated to raising dairy cattle located in the Colombian Andes. Animal (ruminal fluid and feces) and environmental (soil and water) samples were evaluated, and resistant heterotrophic bacteria were found in rumen fluid, feces, soil, and runoff water samples. The resistant bacteria were isolated and identified based on the 16S rDNA region. Subsequently, they were evaluated for the presence of tet genes, which encode ribosomal protection proteins and membrane efflux pumps. The most frequent phyla detected were Firmicutes and Proteobacteria. The most common resistance genes found were tet(W), tet(Q), and tet(M). The nucleotide sequences... |
| Tipo: Journal article |
Palavras-chave: Antimicrobial resistance; Cattle farms; Colombian Andes; Environmental pollution; Tetracycline. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300002 |
| |
|
| |
|
|
| Reyes-Garcia,Luis; Cuevas,Yuri; Ballesteros,Carolina; Curkovic,Tomislav; Löfstedt,Christer; Bergmann,Jan. |
| L. Reyes-Garcia, Y. Cuevas, C. Ballesteros, T. Curkovic, C. Löfstedt, and J. Bergmann. 2014. A 4-component sex pheromone of the Chilean fruit leaf roller Proeulia auraria (Lepidoptera: Tortricidae). Cien. Inv. Agr. 41(2):187-196. The Chilean fruit leaf roller Proeulia auraria is a pest of economically important fruit species. Two compounds attractive to males have been identified as (E)-11-tetradecenyl acetate (E11-14:OAc) and (E)-11-tetradecenol (E11-14:OH) and are currently being used in Chile to monitor this species. Preliminary experiments carried out by our group suggested that the 2-compound mixture might not be optimal for the attraction of males, which prompted us to reinvestigate the sex pheromone of P. auraria in the present study. The pheromone... |
| Tipo: Journal article |
Palavras-chave: Eulia; Euliini; Native species; Sex attractant; Tortricinae. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000200005 |
| |
|
|
| Besoain,Ximena; Bertolini,Edson; Camps,Rocío; Ramella,Fiona; Gorris,María Teresa; Torres,Margarita; Cambra,Mariano. |
| Citrus tristeza virus (CTV) was reported in the 1960's to affect Meyer lemon trees in Chile, but no field symptoms were observed. This study performed a complete biological, serological and molecular characterization of one hundred CTV isolates obtained from different hosts and geographical origins. Decline symptoms (DI) were not found on trees grafted onto sour orange. In Pica Oasis in northern Chile, stem pitting (SP) was found to affect grapefruit and Mexican lime trees. Most isolates present in the central area were considered mild (MCA-13-negative), while in the northern area aggressive isolates were observed and detected. Some of these isolates were capable of causing SP on grapefruit under field and greenhouse conditions and on sweet orange under... |
| Tipo: Journal article |
Palavras-chave: Biological indexing; CTV; Molecular characterization; Stem pitting; Seedling yellows. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200011 |
| |
|
| |
|
|
| Montealegre,Jaime R; Ochoa,Fabián; Besoain,Ximena; Herrera,Rodrigo; Pérez,Luz M. |
| J.R. Montealegre, F. Ochoa, X. Besoain, R. Herrera, and L.M. Pérez. 2014. In vitro and glasshouse biocontrol of Rhizoctonia solani with improved strains of Trichoderma spp. Cien. Inv. Agr. 41(2):197-206. The potential of Trichoderma spp. fusants for the biocontrol of Rhizoctonia solani was compared with the ability of their corresponding parental strains. Their effect was tested in vitro using two R. solani strains, 509 (AG 2-1) and 618 (AG 4). The highest inhibitions in growth in dual cultures were obtained with the ThF2-1 (89.79%), ThF3-3 (90.55%), ThF4-15 (91.75%) and ThF5-8 (77.67%) fusants on R. solani 509; only ThF2-1 was able to inhibit the growth of R. solani 618 (60.19%). The inhibitory effect on growth was mainly due to diffusible metabolites.... |
| Tipo: Journal article |
Palavras-chave: Biological control; Methyl bromide; Tomato; Solanum lycopersicum. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000200006 |
| |
|
|
| Montenegro,Gloria; Gómez,Miguel; Díaz-Forestier,Javiera; Pizarro,Rodrigo. |
| La producción apícola chilena se caracteriza por una gran variedad de tipos de mieles, con una alta participación de especies vegetales nativas, las que les otorgan cualidades particulares, debido al alto endemismo de su flora. Alrededor del 95% de la miel producida en Chile es exportada a granel, sin ningún valor agregado, lo que equivale al 1% de participación en el mercado de exportación melífera. Como es imposible tener alguna ingerencia en el comercio mundial de este producto, se hace necesario mejorar la competitividad diferenciando la producción y convirtiéndola en un producto particular, con características únicas. Un avance importante en este sentido ha sido el establecimiento de un sistema de trazabilidad y la implementación de la Norma Chilena... |
| Tipo: Journal article |
Palavras-chave: Abeja; Miel; Origen botánico; Tipificación; Mieles chilenas. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000200007 |
| |
|
|
| Rivera,Samuel; Kershner,Jeffrey L; Keller,Gordon R. |
| Using forest roads produces more erosion and sedimentation than any other forest or agricultural activity. This study evaluated soil losses from a forest road in central Honduras over two consecutive years. We divided a 400-m segment of road into 8 experimental units, each 50 m in length. Four units were treated with Best Management Practices (BMPs) and four were left untreated. The BMP treatments included reshaping the road prism, installing culverts and reshaping of road ditches, compacting 20-cm layers of the road tread, crowning the road surface (3% slope, double drainage), longitudinal sloping (less than 12%), and adding a 10-cm layer of gravel (crush size = 0.63 cm). Soil movement was measured daily during the rainy seasons. The highest soil loss... |
| Tipo: Journal article |
Palavras-chave: Erosion; Forest roads; Honduras; Road surface; Soil; Tropical forest. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000300009 |
| |
|
|
| Nicolau,Rafaela F; Mercante,Erivelto; Maggi,Marcio F; de Souza,Eduardo G; Gasparin,Eloi. |
| The purpose of this study was to analyze the spatial variability of soil properties and productivity and the chemical and physical properties of oranges (Monte Parnaso variety) in their geographical quadrants. This experiment was conducted in a commercial orange orchard in the municipality of Nova Laranjeiras in the State of Paraná, Brazil. A GPS receiver and a total station were used to measure the spatial location of the fruit and to determine which quadrant they were located in. In this experiment, 13 trees were studied. Twelve fruits were evaluated in each geographical quadrant, and 156 fruits were considered. After harvest, the productivity was expressed as kg per quadrant (kg quadrant-1). Next, physical tests (equatorial diameter (EqD), total fruit... |
| Tipo: Journal article |
Palavras-chave: Citriculture; Geostatistics; Spatial variability. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300006 |
| |
|
| |
|
|
| Martin,María José; Fredes,Carolina; Nuñez,Gabriel; Ginocchio,Rosanna; Montenegro,Gloria. |
| The color of honey has special relevance in the international market, as different markets demand specific colors of honey. Chile has very diverse native and exotic flora, which are used by bees (Apis mellifera) to produce a range of honey types, including honeys of different colors. In this context, determining the relationships between color and botanical origin among Chilean honeys is very relevant. The objectives of the present study were to compare three methodologies for determining color in Chilean honeys (Pantone®, optical density (OD), and Pfund) and to define the relationship between color and botanical origin of the characterized honeys. The most common honeys from the Libertador Bernardo O'Higgins Region (VI Region) of Chile were Galega... |
| Tipo: Journal article |
Palavras-chave: Honey markets; Melissopalynological analysis; Optical density; Pantone®; Pfund. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300014 |
| |
|
|
| Donoso,Sergio; Peña-Rojas,Karen; Pacheco,Cristian; Durán,Sergio; Santelices,Rómulo; Mascaró,Cristóbal. |
| Acacia caven (Mol.) Mol. (Leguminosae), generally known as "espino," is one of the most common tree species in the Mediterranean region of Chile. This species grows in nutritionally poor soils with low water availability during the summer, so it is very difficult for new seedlings to become established. To investigate the effects of water restriction and the potential benefit of the application of biosolids (sludge bio-dried to 25% moisture) on the growth of the plant, a completely random, two x three factorial design was carried out in controlled nursery conditions under two irrigation regimes (well-watered plants and controlled water restriction) and three biosolid application rates (0:100, 10:90 and 20:80) in a clay substrate. Physiological evaluations... |
| Tipo: Journal article |
Palavras-chave: Biomass; Predawn water potential; Photosynthesis; Shoot:root ratio; Water restriction. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200013 |
| |
|
|
| Youlton,Cristian; Bragion,Ana Paula; Wendland,Edson. |
| C. Youlton, A. P. Bragion, and E. Wendland. 2016. Experimental evaluation of sediment yield in the first year after replacement of pastures by sugarcane. Cien. Inv. Agr. 43(3): 374383. Sugarcane cultivation has expanded in south-eastern Brazil in the last decade, mainly for biofuel (ethanol) production. This expansion has occurred on land that was originally covered with pasture and used for livestock production. The purpose of this study is to experimentally determine the impact on runoff and erosion produced by replacing pasture with sugarcane. Runoff plots of 100 m² were established at a farm in Itirapina, Sao Paulo (SP), Brazil, on a hill with a 9% slope and sandy soil. An 18-year-old pasture and a new sugarcane plantation were studied. The degrees of... |
| Tipo: Journal article |
Palavras-chave: Land use change; Runoff; Sediment granulometry; Soil erosion. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300005 |
| |
|
| |
|
|
| Curkovic,Tomislav; Ferrera,Catalina. |
| Callisphyris apicicornis is a fruit pest of increasing concern in Chile. To aid in the identification of its sex pheromone for use in the management of this insect, "calling" (pheromone release) of females and "orientation and searching" behaviors of males to calling females were video recorded. Light intensity, wind speed, temperature, time of the day, and the frequency of individuals performing each step within both behavioral sequences were recorded as well. Drawings of the behavioral steps and ethograms (routes and returns) are also provided, including transition frequencies between behavioral steps. The calling behavior of females included diagnostic movements of the abdomen, legs, elytra, and wings, showing similarities to the descriptions of other... |
| Tipo: Journal article |
Palavras-chave: Cerambycidae; Insect age; Light intensity; Pheromone; Sexual behavior. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100012 |
| |
|
| |
|
| |
|
|
| Riquelme,Javiera; Olaeta,José Antonio; Gálvez,Lena; Undurraga,Pedro; Fuentealba,Claudia; Osses,Andrea; Orellana,Jaime; Gallardo,José; Pedreschi,Romina. |
| Sarcocornia neei is a halophyte that grows on the coast of the Valparaiso Region of Chile. Studies related to its nutritional and functional value under wild and cultivated conditions are not available. Thus, in this study, a nutritional (complete proximal, mineral and dietary fiber analysis) and functional characterization (total phenolics, β-carotene, hydrophilic and lipophilic antioxidant activity (HAA and LAA) and ascorbic acid) were performed for wild and cultivated plants. Wild plants displayed higher amounts of compounds involved in stress defense mechanisms such as total phenolics, proteins, dietary fiber and ash. The mineral analysis revealed that Na+ and Cl- are the main ions accumulated in wild and cultivated Sarcocornia neei that are... |
| Tipo: Journal article |
Palavras-chave: Antioxidant; Dietary fiber; Proximal analysis; Seawater; Sustainability. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200011 |
| |
|
|
| Morales,Pamela; Schiappacasse,Flavia; Peñailillo,Patricio; Yañez,Paola. |
| Bulb weight or size is one of the critical factors affecting the vegetative growth and flowering of bulbous species. This study assessed the effect of bulb weight on the growth and flowering of Herbaria lahue subsp. lahue. This bulbous species, commonly known as "lahue," has the potential to be used as an ornamental plant. Lahue bulbs were collected during their dormant period from Tregualemu (Region del Maule), grouped by weight categories and planted in Talca in an unheated polyethylene greenhouse. Phenology data, flowering characteristics and the number of newly formed bulbs were recorded for one season. Plants emerged 2-3 weeks after planting and flowered during the spring, between 8 and 9 months after planting. During fruit set, the leaves began their... |
| Tipo: Journal article |
Palavras-chave: Chilean bulbs; Geophyte; Mediterranean climate. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200010 |
| |
| Registros recuperados: 7.826 | |
|
|
|
