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Search Results: 1 - 10 of 677147 matches for " Julio; Gra?a S "
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Efficacy of Different Rates of Sexual Pheromoneof Phthorimaea operculella (Zeller) (Lepidoptera: Gellechiidae) in Maleso of PotatoTuber Moth Captures Efectividad de Distintas Dosis de Feromona Sexual de Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) en la Captura de Machos de Polilla de la Papa
Patricia Larraín S,Michel Guillon,Julio Kalazich B,Fernando Graa S
Agricultura Técnica , 2007,
Abstract: Potato tuber moth (PTM), Phthorimaea operculella (Zeller), widely world distributed, is one of the most serious insect pest attacking potatoes (Solanum tuberosum L.). Larvae develop in foliage and tubers of potato causing direct losses of edible product. Chemicals treatment to control this pest have shown limited efficacy, especially when larvae is under the soil. The utilization of synthetic pheromones as a tool that interferes with insects mating had been widely demonstrated in numerous moth and others insects species. With the objective to evaluate the efficacy of different doses of pheromone per trap in PTM males captures for its future utilization as a mass trapping technique, two experiments in a complete randomized blocks design, were carried out at Valle del Elqui, Coquimbo ,egión, Chile, during the summer season 2003-2004, and spring 2004. Doses of 0.2, 0.5, 1, 2 and 5 mg and 0.05, 0.1, 0.2, and 0.5 mg of PTM sex pheromone mixture (E4-Z7 Tridecadienil acetate, and E4-Z7-Z10 Tridecatrienil acetate at rate 1:1.5) per trap were evaluated. Results showed that pheromone′s dispensers loaded with the rates of 0.2 and 0.5 mg, captured the larger numbers of PTM males per trap. With the optimization of the pheromone rate per trap, studies will continue to propose PTM mass trapping technique, a non chemical method of control, environmentally safe. La polilla de la papa, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), es uno de los insectos plaga más importantes que atacan al cultivo de la papa (Solanum tuberosum L.). Las larvas se desarrollan en el follaje y tubérculos de papa causando pérdidas directas del producto a comercializar. Los tratamientos químicos para el control de esta plaga han mostrado eficiencia limitada, especialmente cuando la larva está bajo el suelo. La utilización de feromonas sintéticas como una herramienta que interfiere con el apareamiento, ha sido ampliamente demostrada en innumerables especies de polillas y otros insectos. Con el fin de evaluar la efectividad de diferentes dosis de feromona en la captura de machos de P. operculella, para su futura utilización como técnica de trampeo masivo, se realizaron dos ensayos en un dise o de bloques completos al azar, durante las temporadas verano 2003-2004, y primavera 2004, en el Valle del Elqui, IV Región, Chile. Dosis de 0,2; 0,5; 1; 2 y 5 mg y 0,05; 0,1; 0,2 y 0,5 mg de la mezcla de las feromonas sexuales sintéticas de la polilla de la papa (E4-Z7 Tridecadienil acetate, and E4-Z7-Z10 Tridecatrienil acetate, en tasa de 1:1,5) por trampa. Los resultados obtenidos indican qu
Effect of Pheromone Trap Density on Mass Trapping of Male Potato Tuber Moth Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), and Level of Damage on Potato Tubers
Larraín S,Patricia; Guillon,Michel; Kalazich,Julio; Graa,Fernando; Vásquez,Claudia;
Chilean journal of agricultural research , 2009, DOI: 10.4067/S0718-58392009000200018
Abstract: potato tuber moth (ptm), phthorimaea operculella (zeller), is one of the pests that cause the most damage to potatoes (solanum tuberosum l.) in both field crops and storage, especially in regions where summers are hot and dry. larvae develop in the foliage and tubers of potatoes and cause direct losses of edible product. the use of synthetic pheromones that interfere with insect mating for pest control has been widely demonstrated in numerous lepidoptera and other insect species. an experiment was carried out during the 2004-2005 season in valle del elqui, coquimbo region, chile, to evaluate the effectiveness of different pheromone trap densities to capture p. operculella males for future development of a mass trapping technique, and a subsequent decrease in insect reproduction. the study evaluated densities of 10, 20, and 40 traps ha-1, baited with 0.2 mg of ptm sexual pheromone, and water-detergent for captures. results indicated that larger numbers of male ptm were captured per trap with densities of 20 and 40 traps per hectare, resulting in a significant reduction (p < 0.05) of tuber damage in these treatments compared with the control which used conventional chemical insecticide sprays.
Effect of Pheromone Trap Density on Mass Trapping of Male Potato Tuber Moth Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), and Level of Damage on Potato Tubers Efecto de la Densidad de Trampas de Feromona en Masiva de Machos de Polilla de la Papa, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), y en el Nivel de Da o a los Tubérculos
Patricia Larraín S,Michel Guillon,Julio Kalazich,Fernando Graa
Chilean Journal of Agricultural Research , 2009,
Abstract: Potato tuber moth (PTM), Phthorimaea operculella (Zeller), is one of the pests that cause the most damage to potatoes (Solanum tuberosum L.) in both field crops and storage, especially in regions where summers are hot and dry. Larvae develop in the foliage and tubers of potatoes and cause direct losses of edible product. The use of synthetic pheromones that interfere with insect mating for pest control has been widely demonstrated in numerous Lepidoptera and other insect species. An experiment was carried out during the 2004-2005 season in Valle del Elqui, Coquimbo Region, Chile, to evaluate the effectiveness of different pheromone trap densities to capture P. operculella males for future development of a mass trapping technique, and a subsequent decrease in insect reproduction. The study evaluated densities of 10, 20, and 40 traps ha-1, baited with 0.2 mg of PTM sexual pheromone, and water-detergent for captures. Results indicated that larger numbers of male PTM were captured per trap with densities of 20 and 40 traps per hectare, resulting in a significant reduction (P < 0.05) of tuber damage in these treatments compared with the control which used conventional chemical insecticide sprays. La polilla de la papa, Phthorimaea operculella (Zeller), es una de las plagas que causan mayor da o a la papa (Solanum tuberosum L.), tanto a los cultivos en campo como a los tubérculos almacenados, especialmente en zonas de climas cálidos y secos. Las larvas de este insecto se desarrollan en el follaje y tubérculos de papa causando pérdidas directas del producto a comercializar. La utilización de feromonas sintéticas, como una herramienta que interfiere con el apareamiento, ha sido ampliamente demostrada en innumerables especies de polillas y otros insectos. Con el fin de evaluar la efectividad de diferentes densidades de trampas de feromona en la captura de machos de P. operculella, para su futura utilizacióncomo técnica de trampeo masivo y consecuente disminución de la reproducción del insecto, se realizó un estudio durante la temporada 2004-2005, en el Valle del Elqui, Región de Coquimbo, Chile. Se evaluaron densidades de 10, 20 y 40 trampas ha-1 con una carga de 0,2 mg de feromona por trampa, utilizando trampas de agua con detergente para las capturas. Los resultados indican que la mayor captura de machos de polilla de la papa se obtiene con densidades de 20 y 40 trampas ha-1, encontrándose también una reducción significativa (P < 0,05) del da o en tubérculos en estos tratamientos comparados con el testigo convencional con aspersiones de insecticidas.
La verdad asediada. Discursos de y para el poder. Escritura, institucionalización y élites indígenas sur andinas. Charcas. Siglo XVI
Mario Julio Graa
Andes , 2001,
Abstract: En el presente trabajo, el autor se pregunta sobre aquellas narraciones que permitieron viabilizar un profundo cambio en los sistemas de legitimación de las élites nativas, tomando como eje de análisis las Probanzas de Méritos y Servicios presentadas por don Juan Colque Guarache, cacique de las etnías Quillaca, Asanaque, Sivaroyo, Haracapi y Uruquilla hacia finales del siglo XVI. Lejos de ser verdadera y confiable, la información que se desprende de estas fuentes en efecto sirvió para la construcción de discursos de verdad que, a la vez que dieron un marco legítimo a los reclamos y peticiones de los caciques surandinos, permitieron su gradual inclusión en el naciente sistema colonial. Esta inclusión se aceleró con las negociaciones emprendidas por el virrey don Francisco de Toledo, para mediante el apoyo de distintos jefes étnicos surandinos, acceder al manejo de la mano de obra tan necesaria para la explotación de Potosí. A partir de estas negociaciones, los caciques encuentran un lugar como funcionarios de un sistema colonial, legalizado por la creación de cargos como las Capitanías de Mita o Alcaldías Mayores de Indios que, creemos, representaron las primeras formas de institucionalización de las élites nativas
Efficacy of Different Rates of Sexual Pheromoneof Phthorimaea operculella (Zeller) (Lepidoptera: Gellechiidae) in Maleso of PotatoTuber Moth Captures
Larraín S,Patricia; Guillon,Michel; Kalazich B,Julio; Graa S,Fernando; Vásquez R,Claudia;
Agricultura Técnica , 2007, DOI: 10.4067/S0365-28072007000400011
Abstract: potato tuber moth (ptm), phthorimaea operculella (zeller), widely world distributed, is one of the most serious insect pest attacking potatoes (solanum tuberosum l.). larvae develop in foliage and tubers of potato causing direct losses of edible product. chemicals treatment to control this pest have shown limited efficacy, especially when larvae is under the soil. the utilization of synthetic pheromones as a tool that interferes with insects mating had been widely demonstrated in numerous moth and others insects species. with the objective to evaluate the efficacy of different doses of pheromone per trap in ptm males captures for its future utilization as a mass trapping technique, two experiments in a complete randomized blocks design, were carried out at valle del elqui, coquimbo ,egión, chile, during the summer season 2003-2004, and spring 2004. doses of 0.2, 0.5, 1, 2 and 5 mg and 0.05, 0.1, 0.2, and 0.5 mg of ptm sex pheromone mixture (e4-z7 tridecadienil acetate, and e4-z7-z10 tridecatrienil acetate at rate 1:1.5) per trap were evaluated. results showed that pheromone′s dispensers loaded with the rates of 0.2 and 0.5 mg, captured the larger numbers of ptm males per trap. with the optimization of the pheromone rate per trap, studies will continue to propose ptm mass trapping technique, a non chemical method of control, environmentally safe.
COMPOSITION AND BIOLOGICAL ACTIVITY OF THE ESSENTIAL OIL OF PERUVIAN LANTANA CAMARA
BENITES,JULIO; MOITEIRO,CRISTINA; MIGUEL,GRAA; ROJO,LEONEL; LóPEZ,JOSé; VEN?NCIO,FLORêNCIA; RAMALHO,LUíS; FEIO,SóNIA; DANDLEN,SUSANA; CASANOVA,HUGO; TORRES,IVáN;
Journal of the Chilean Chemical Society , 2009, DOI: 10.4067/S0717-97072009000400012
Abstract: the composition of the essential oil from pantana cámara l. (verbenaceae) obtained by hydrodistillation of the aerial parts was examined by gc, gc/ ms, and 13c-nmr. the gc analysis showed that carvone is the most abundant monoterpene 75.9%, together with limonene 16.9%, accounting for 92.8% of the oil. the major components were also tested by "c-nmr analysis of the essential oil. the l. cámara oil was assayed against several microorganisms, showing moderate antibacterial activity against the human pathogen staphylococcus aureus (mic 200 μg/ml). high antioxidant activity evaluated by the trolox equivalent antioxidant capacity assay (teac) was found (29.0 mmol trolox/kg) and relative low anti-inflammatory activity due to its weak ability for inhibiting lipoxygenase (ic50 = 81.5 μg/ml).
Aspectos atuais da regula??o do peso corporal: a??o da leptina no desequilíbrio energético
Donato Júnior, José;Pedrosa, Rogerio Graa;Tirapegui, Julio;
Revista Brasileira de Ciências Farmacêuticas , 2004, DOI: 10.1590/S1516-93322004000300003
Abstract: nowadays obesity can be considered a global epidemic illness, though it shows a long-term treatment failure index higher than 90%. research work on leptin, which is a peptide mainly produced by fat cells, lead to a breakthrough for medical obesity treatment. it has been found out that leptin - through control of its concentration, could be a marker of the energetic status and depot of fat amounts in cells as well. this occurs by acting in a feedback circuit which function is to maintain body weight stable - this independently of food intake variations. hence, if this circuit presents failures, as i.e. low response to high leptin concentration, patients may become obese. this phenomenon is very common and lead to the "leptin resistance thesis". the aim of this review is to explain leptin's physiological function as an hormone that "prevents" weight loss because physiological repercussion of leptin concentration reduction seems to be more intense than when it increases - at least in human beings. therefore what has been called - by definition - leptin resistance - seems to be just the result of a concentration which causes a limited physiological action.
Dieta rica em proteína na redu??o do peso corporal
Pedrosa, Rogerio Graa;Donato Junior, Jose;Tirapegui, Julio;
Revista de Nutri??o , 2009, DOI: 10.1590/S1415-52732009000100010
Abstract: the ideal proportion of macronutrients in weight loss diets is currently under debate. there are evidences indicating that a higher proportion of protein during weight loss diets enhances the loss of body weight and fat mass, and reduces the loss of lean body mass. nevertheless, the responsible mechanisms for these effects have not yet been fully elucidated. furthermore, studies that evaluated the possible side effects of these diets on the renal function and on the nutritional state of calcium have shown inconclusive results. therefore, this article has the objective to convey recent information about the effects of high-protein diets in the regulation of the body weight and body composition, besides its involved mechanisms, and its effects on the renal function and on the calcium nutritional status.
COMPOSITION AND BIOLOGICAL ACTIVITY OF THE ESSENTIAL OIL OF PERUVIAN LANTANA CAMARA
JULIO BENITES,CRISTINA MOITEIRO,GRAA MIGUEL,LEONEL ROJO
Journal of the Chilean Chemical Society , 2009,
Abstract: The composition of the essential oil from Pantana cámara L. (Verbenaceae) obtained by hydrodistillation of the aerial parts was examined by GC, GC/ MS, and 13C-NMR. The GC analysis showed that carvone is the most abundant monoterpene 75.9%, together with limonene 16.9%, accounting for 92.8% of the oil. The major components were also tested by "C-NMR analysis of the essential oil. The L. cámara oil was assayed against several microorganisms, showing moderate antibacterial activity against the human pathogen Staphylococcus aureus (MIC 200 μg/ml). High antioxidant activity evaluated by the Trolox equivalent antioxidant capacity assay (TEAC) was found (29.0 mmol Trolox/kg) and relative low anti-inflammatory activity due to its weak ability for inhibiting lipoxygenase (IC50 = 81.5 μg/ml).
Túmulos, mouros, enanos, gigantes, salvaje caza La etnografía gallega vista como registro arqueológico no intervencionista
Andrés Pena Graa
Brathair , 2008,
Abstract: The Galician population, which is of a Palaeolithic origin, belongs to the late Bronze Age and to the Iron Age Atlantic Celtic cultural complex. In the concept of the genesis and development of Celtic culture, our study - or our autopsies, “visións” – focuses on Galicia, the northwestern region of Spain. As Alinei’s 'Palaeolithic Continuity Theory' states, we reject the hypothesis that an 'Indo-European' or 'Celtic' population, proceeding from Central Europe, could have come to Galicia as an ethnic group in the Bronze or Iron Ages. In the cultural Atlantic area, the background of complex accumulative systems, cultural convergence and interrelationship developed and transformed a common ethnology, religiousness, law, and ancient forms of political organization (without solution of continuity) almost to the present day.
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