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Search Results: 1 - 10 of 8650 matches for " ISABEL VIVES "
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Biodeterioro en rolletes de Pinus radiata preservados con sal CCA frente al ataque de hongos de pudrición parda
Torres,Marco; Figueroa,Víctor; Vives,Isabel;
Bosque (Valdivia) , 2011, DOI: 10.4067/S0717-92002011000300013
Abstract: in chile, pinus radiata wood has been classified as not durable according to chilean standards nch789. to increase its durability it is required to impregnate it with type cca (copper, chromium, arsenic) soluble salts. the aim of this study was to analyse the effectiveness of the impregnation of five p. radiata round wood treated with this salt. from each 260 cm long round wood a disc was removed from one end, which withdrew a central strip that provided the samples for determination of preservative retention by calcinations and bio-deterioration through accelerated laboratory tests using two brown rot fungi, gloeophylum trabeum and poria placenta. it was observed, in the five samples of round wood, that the penetration of the preservative was irregular and pond shaped; covering between 40 to 80 % of the total area, with little consistency in the retention and focusing on the periphery of discs. the preservative salt retention reached 4.3 to 10.5 kg m-3 on discs periphery, while in the inner zone, close to the pith, the retentions were 0.3 to 3.1 kg m-3. the specimens from the periphery of the round wood subjected to attack by xylophages fungi showed a mass loss of 1 %, classifying the impregnated cca wood of p. radiata as highly resistant and in the inner zone, close to the pith, mass loss reached 26 %, moderately resistant.
Ensayos de eficacia cuarentenaria de tres formulaciones de antimanchas comercializadas en Chile para un proceso simulado de exportación de madera aserrada de Pinus radiata
VIVES,ISABEL; IDE,SANDRA; PEREDO,HERNAN;
Bosque (Valdivia) , 2004, DOI: 10.4067/S0717-92002004000300009
Abstract: three anti-sapstain products were tested on sawn pinus radiata timber in the eighth as well as in the tenth regions of chile. the fungicide products were combo antiblu (a mixture of antiblu 375 and antiblu cc), wolsin fl 12215 and sinesto b. results showed that the products were more effective in the tenth region than in the eighth region. of the three products tested, combo antiblu had the best characteristics in both regions.
Biodeterioro en rolletes de Pinus radiata preservados con sal CCA frente al ataque de hongos de pudrición parda Bio-deterioration of Pinus radiata round wood preserved with CCA salt against brown rot fungi
Marco Torres,Víctor Figueroa,Isabel Vives
Bosque (Valdivia) , 2011,
Abstract: En Chile la madera de Pinus radiata ha sido clasificada como no durable según la norma chilena NCh789. Para aumentar su durabilidad se puede impregnar con sales hidrosolubles tipo CCA (cobre, cromo, arsénico). El objetivo del estudio fue analizar la efectividad de la impregnación de rolletes de P. radiata tratados con esta sal ante el biodeterioro. De cinco rolletes de 260 cm de largo se extrajo un trozo a 50 cm desde un extremo, del cual se retiró un listón central que proporcionó las probetas. Se determinó la retención del preservante mediante calcinación y el biodeterioro a través de ensayos acelerados de laboratorio, utilizando dos hongos de pudrición parda, Gloeophylum trabeum y Poria placenta. La penetración del preservante fue irregular y en forma de lagunas, cubriendo entre 40 y 80 % del área total, con poca uniformidad en la retención, concentrándose esta en la periferia de los rolletes. La retención de la sal preservante en la periferia alcanzó 4,3 a 10,5 kg m-3, mientras que en la zona interna, cercana a la médula, fue de 0,3 a 3,1 kg m-3. Las probetas de la periferia de los rolletes sometidas al ataque de los hongos xilófagos presentaron una pérdida de masa de 1 %, clasificando la madera impregnada de P. radiata con CCA como altamente resistente; en la zona interna, cercana a la médula, alcanzó una pérdida de masa de 26 %, clasificándose como moderadamente resistente. In Chile, Pinus radiata wood has been classified as not durable according to Chilean standards NCh789. To increase its durability it is required to impregnate it with type CCA (copper, chromium, arsenic) soluble salts. The aim of this study was to analyse the effectiveness of the impregnation of five P. radiata round wood treated with this salt. From each 260 cm long round wood a disc was removed from one end, which withdrew a central strip that provided the samples for determination of preservative retention by calcinations and bio-deterioration through accelerated laboratory tests using two brown rot fungi, Gloeophylum trabeum and Poria placenta. It was observed, in the five samples of round wood, that the penetration of the preservative was irregular and pond shaped; covering between 40 to 80 % of the total area, with little consistency in the retention and focusing on the periphery of discs. The preservative salt retention reached 4.3 to 10.5 kg m-3 on discs periphery, while in the inner zone, close to the pith, the retentions were 0.3 to 3.1 kg m-3. The specimens from the periphery of the round wood subjected to attack by xylophages fungi showed a mass loss of 1 %, classif
Ensayos de eficacia cuarentenaria de tres formulaciones de antimanchas comercializadas en Chile para un proceso simulado de exportación de madera aserrada de Pinus radiata Quarantine efficacy of three anti-bluestain formulas sold in Chile, in a simulated export process involving sawn Pinus radiata timber
ISABEL VIVES,SANDRA IDE,HERNAN PEREDO
Bosque (Valdivia) , 2004,
Abstract: Se ensayaron tres productos antimancha en madera aserrada de Pinus radiata tanto en la Octava como en la Décima Región de Chile. Los productos fungicidas fueron Combo Antiblu (mezcla de Antiblu 375 y Antiblu CC), Wolsin FL 12215 y Sinesto B. De los resultados obtenidos se pudo comprobar que los productos utilizados fueron más efectivos en la Décima que en la Octava Región. De los tres productos ensayados Combo Antiblu tuvo el mejor resultado en ambas regiones al proteger la madera. Three anti-sapstain products were tested on sawn Pinus radiata timber in the Eighth as well as in the Tenth Regions of Chile. The fungicide products were Combo Antiblu (a mixture of Antiblu 375 and Antiblu CC), Wolsin FL 12215 and Sinesto B. Results showed that the products were more effective in the Tenth Region than in the Eighth Region. Of the three products tested, Combo Antiblu had the best characteristics in both Regions.
Caracterización fitosanitaria de astillas de Eucalyptus spp. y de especies nativas
LANFRANCO,DOLLY; IDE,SANDRA; RUIZ,CECILIA; VIVES,ISABEL; PEREDO,HERNAN;
Bosque (Valdivia) , 2003, DOI: 10.4067/S0717-92002003000100004
Abstract: this study lists and discusses the occurrence of insects and fungi in eucalyptus (eucalyptus globulus and e. nitens) chips, as well as on chips from native forest species, for export from chilean ports. eight shipments were inspected and analyzed. the main problem was the establishment of ceratocystis spp. fungi during chip storage. although no insect species were found, empty galleries were present in the native hardwoods, albeit at very low frequencies (0.05-0.43%). there were no detectable problems with eucalyptus chips.
Phaeocryptopus gaeumannii, patógeno causante del "swiss needle cast" en Pseudotsuga menziesii: antecedentes de su biología, medidas de control y situación en Chile Phaeocryptopus gaeumannii, pathogen causing the "swiss needle cast" in Pseudotsuga menziesii: biology background, control measures and situation in Chile
Rodrigo Morales,Eugenio Sanfuentes,Isabel Vives,Eduardo Molina
Bosque (Valdivia) , 2012,
Abstract: El swiss needle cast o pérdida suiza de las acículas, es una enfermedad de carácter fungoso provocada por el patógeno Phaeocryptopus gaeumannii, organismo que causa severas defoliaciones en Pseudotsuga menziesii (pino oregón) en el mundo, originando pérdidas en el volumen de madera para cosechar. Este patógeno se distribuye en el rango nativo de P. menziesii en América del Norte (EE.UU., Canadá y México) y se ha introducido en Europa, Nueva Zelanda, Turquía y, recientemente en Chile. Actualmente, el país cuenta con una superficie superior a las 16.000 hectáreas de plantaciones de P. menziesii, las cuales van en aumento por tratarse de una especie con potencial productivo considerada en programas de diversificación de especies. En Chile P. gaeumannii se encuentra distribuido desde las regiones de La Araucanía a Los Lagos, concentrándose en estas zonas la mayor superficie de P. menziesii del país (70 % aproximadamente). El objetivo de esta revisión fue analizar estudios relacionados a la biología y ciclo de vida del patógeno, la epidemiología y procesos de infección, impacto en las plantaciones y medidas de control implementadas en los diferentes países afectados por este patógeno, de manera de contar con antecedentes científicos para realizar los primeros estudios en Chile, referentes a investigación básica y aplicada para el país. Swiss needle cast is a disease caused by Phaeocryptopus gaeumannii, a fungal pathogen causing severe defoliation in Pseudotsuga menziesii (Douglas fir) in some countries of the world, leading to losses in the volume of timber harvesting. This pathogen is distributed in the native range of P. menziesii in North America (U.S., Canada and Mexico) and has been introduced in Europe, New Zealand, Turkey and, recently, in Chile. Currently the country has an area larger than 16,000 ha of plantations of P. menziesii, which are increasing because it is a potentially productive species considered in species diversification programs. In Chile P. gaeumannii is distributed from the region of La Araucanía to Los Lagos, focusing on these areas the largest area of Douglas fir in the country (70 % approximately). The aim of this review was to examine studies related to biology and life cycle of the pathogen, epidemiology and infection processes, impact on plantations and control measures implemented in the different countries affected by this pathogen, in order to have a background take on the first studies to Chile, a referent to basic and applied research for the country.
Caracterización fitosanitaria de astillas de Eucalyptus spp. y de especies nativas Phytosanitary characterization of Eucalyptus spp. and native species chips
DOLLY LANFRANCO,SANDRA IDE,CECILIA RUIZ,ISABEL VIVES
Bosque (Valdivia) , 2003,
Abstract: Se entregan los primeros antecedentes sobre el estado sanitario de astillas de Eucalyptus globulus, E. nitens y de especies nativas. Se estudiaron ocho embarques de astillas, en los cuales el principal problema debido principalmente al tiempo de acanchado del producto fue la presencia de hongos manchadores pertenecientes al género Ceratocystis. No existen problemas ocasionados por insectos, sólo se detectó la presencia de galerías, en un porcentaje muy bajo de astillas de especies nativas (0,05-0,43%), no detectándose problemas en astillas de Eucalyptus spp. This study lists and discusses the occurrence of insects and fungi in eucalyptus (Eucalyptus globulus and E. nitens) chips, as well as on chips from native forest species, for export from Chilean ports. Eight shipments were inspected and analyzed. The main problem was the establishment of Ceratocystis spp. fungi during chip storage. Although no insect species were found, empty galleries were present in the native hardwoods, albeit at very low frequencies (0.05-0.43%). There were no detectable problems with Eucalyptus chips.
Violencia contra la mujer en la pareja: determinantes y respuestas sociosanitarias
Ruiz-Pérez,Isabel; Blanco-Prieto,Pilar; Vives-Cases,Carmen;
Gaceta Sanitaria , 2004, DOI: 10.1590/S0213-91112004000800003
Abstract: the present study aims to review the problem of intimate partner violence, as well as its causes and consequences. it will also specifically analyze the role of health professionals. in opposition to the classical epidemiological view of risk factors, heise proposes an ?ecological framework? to study violence against women. this framework analyzes the interplay among the personal, situational and sociocultural factors that combine to cause abuse. regarding the frequency of intimate partner violence in spain, in january 2003 there were 2.519 formal complaints and 69 women died between january and november 2003. no geographical patterns in mortality or the incidence of formal complaints of intimate partner violence or among the provinces with the highest incidence of formal complains and those with highest mortality were observed. the only national survey published in spain was performed by the women's institute in 1999, which reported a prevalence of domestic violence of 9.2%. a frequency of 22.8% was found in a primary health care center in granada. health services can play a key role in helping victims of domestic violence, since most women contact the health services at some time in their lives. professionals in administrative or managerial positions can contribute to raising awareness of this health problem, which is one of the main causes of poor health and disability. evidently, beyond consciousness-raising and early detection campaigns, public health strategies should be designed to prevent this serious health problem the causes of which can be changed.
Migración Recurrente del Botón de Gastrostomía: "Síndrome de Buried Bumper" Recurrent migration of internal bumper gastrostomy: Buried bumper syndrome
Luis Andrés Vives O.,Teresa Alarcón O.,Rosana Faúndez H.,Isabel Miquel E.
Revista chilena de pediatría , 2005,
Abstract: Introducción: En la actualidad la gastrostomía ha cambiado el manejo de los ni os para el soporte nutricional ambulatorio, así como el soporte nutricional a largo plazo en pacientes con patología crónica. La gastrostomía endoscópica percutánea (GEP) es la técnica de elección hoy en día principalmente por ser segura y porque constituye un procedimiento mínimamente invasivo. Sin embargo, como toda técnica quirúrgica no está libre de complicaciones, siendo una de ellas la migración del botón de gastrostomía en la pared abdominal o gástrica, conocido como Síndrome de Buried Bumper. Caso clínico: Con el fin de ilustrar esta complicación, hasta ahora poco descrita en ni os, se presenta el caso de un preescolar a quien se le realizan dos gastrostomías percutáneas por vía endoscópica, en distintos sitios del estómago, complicándose en ambas oportunidades con este síndrome. Conclusión: Creemos que si bien es ciert o la PEG puede brindar una serie de ventajas al constituir un acceso seguro a la vía digestiva, ésta es una técnica invasiva, con complicaciones no despreciables desde infección de herida operatoria hasta el Buried Bumper, lo cual hace necesario revisar en detalle cada caso en particular con el fin de no agregar morbilidad a nuestro paciente At present, gastrostomy has changed the treatment of children under ambulatory nutritional support, as well as in the long term nutrition of children with chronic pathologies. The percutaneous endoscopic gastrostomy (PEG) is the chosen procedure for its safety and its minimal invasiveness. In spite of this it is not exempt of complications, such as the migration of the gastrostomy button of the abdominal or gastric wall, known as the buried bumper syndrome. Clinical case: to illustrate this complication we present the case of a pre-school patient who underwent 2 endoscopic gastrostomies and on both occasions presented with this complication. Conclusions: In spite of the fact that we believe that PEG has many advantages, it nevertheless is an invasive procedure, with complications ranging from wound infection to buried bumper syndrome. Therefore it is necessary to study the risks-benefits of each particular case to avoid unnecesary morbidity
Surface Generated Acoustic Wave Biosensors for the Detection of Pathogens: A Review
María-Isabel Rocha-Gaso,Carmen March-Iborra,ángel Montoya-Baides,Antonio Arnau-Vives
Sensors , 2009, DOI: 10.3390/s90705740
Abstract: This review presents a deep insight into the Surface Generated Acoustic Wave (SGAW) technology for biosensing applications, based on more than 40 years of technological and scientific developments. In the last 20 years, SGAWs have been attracting the attention of the biochemical scientific community, due to the fact that some of these devices - Shear Horizontal Surface Acoustic Wave (SH-SAW), Surface Transverse Wave (STW), Love Wave (LW), Flexural Plate Wave (FPW), Shear Horizontal Acoustic Plate Mode (SH-APM) and Layered Guided Acoustic Plate Mode (LG-APM) - have demonstrated a high sensitivity in the detection of biorelevant molecules in liquid media. In addition, complementary efforts to improve the sensing films have been done during these years. All these developments have been made with the aim of achieving, in a future, a highly sensitive, low cost, small size, multi-channel, portable, reliable and commercially established SGAW biosensor. A setup with these features could significantly contribute to future developments in the health, food and environmental industries. The second purpose of this work is to describe the state-of-the-art of SGAW biosensors for the detection of pathogens, being this topic an issue of extremely importance for the human health. Finally, the review discuses the commercial availability, trends and future challenges of the SGAW biosensors for such applications.
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