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Search Results: 1 - 10 of 326858 matches for " Lilian; Sánchez "
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Population Growth of Rhopalosiphum padi L. (Homoptera: Aphididae) on Different Cereal Crops from the Semiarid Pampas of Argentina under Laboratory Conditions
Descamps,Lilian R; Sánchez Chopa,Carolina;
Chilean journal of agricultural research , 2011, DOI: 10.4067/S0718-58392011000300007
Abstract: the bird cherry-oat aphid rhopalosiphum padi l. (homoptera: aphididae) is one of the main pests in a number of crops in the semiarid pampas of argentina. in the present study, the effect of different host plants, including triticum aestivum l., ×triticosecale wittm., hordeum vulgare l., hordeum distichum l., avena sativa l., and secale cereale l. on biological parameters of r. padi l. was studied in the laboratory at 24 ± 1 °c, 65 ± 10% rh and a 14:10 photoperiod. longevity, intrinsic rate of natural increase (rm), net reproductive rate (r0), mean generation time (t), doubling time (dt), and finite rate of increase (λ) of the bird cherry-oat aphid on the different cereal crops were estimated. differences in fertility life table parameters of r. padi among host plants were analyzed using pseudo-values, which were produced by jackknife re-sampling. results indicated that beer barley might be the most suitable food for r. padi due to greater adult longevity (20.88 d), higher fecundity (41 nymphs female-1), higher intrinsic rate of natural increase (0.309 females female-1 d-1), lower doubling time (2.24), and lower nymphal mortality (22.2%). therefore, it can be concluded from the present study that r. padi prefers beer barley for fast and healthy development over other cereal crops.
Platón y el consentimiento informado contemporáneo
Chuaire,Lilian; Sánchez,Magda Carolina;
Colombia Médica , 2007,
Abstract: informed consent is an ethical concept inherent to contemporary medical practice and research. in recognition of its importance, some plato’s ideas are examined, on the basis of the influence upon its definition and reaches, especially what refers to the connection between the quality of a free person and his right to make decisions about his health.
Population Growth of Rhopalosiphum padi L. (Homoptera: Aphididae) on Different Cereal Crops from the Semiarid Pampas of Argentina under Laboratory Conditions Crecimiento Poblacional de Rhopalosiphum padi L. (Homoptera: Aphididae) sobre Diferentes Cereales de la Pampas Semiárida de Argentina en Condiciones de Laboratorio
Lilian R Descamps,Carolina Sánchez Chopa
Chilean Journal of Agricultural Research , 2011,
Abstract: The bird cherry-oat aphid Rhopalosiphum padi L. (Homoptera: Aphididae) is one of the main pests in a number of crops in the semiarid Pampas of Argentina. In the present study, the effect of different host plants, including Triticum aestivum L., ×Triticosecale Wittm., Hordeum vulgare L., Hordeum distichum L., Avena sativa L., and Secale cereale L. on biological parameters of R. padi L. was studied in the laboratory at 24 ± 1 °C, 65 ± 10% RH and a 14:10 photoperiod. Longevity, intrinsic rate of natural increase (r m), net reproductive rate (R0), mean generation time (T), doubling time (DT), and finite rate of increase (λ) of the bird cherry-oat aphid on the different cereal crops were estimated. Differences in fertility life table parameters of R. padi among host plants were analyzed using pseudo-values, which were produced by Jackknife re-sampling. Results indicated that beer barley might be the most suitable food for R. padi due to greater adult longevity (20.88 d), higher fecundity (41 nymphs female-1), higher intrinsic rate of natural increase (0.309 females female-1 d-1), lower doubling time (2.24), and lower nymphal mortality (22.2%). Therefore, it can be concluded from the present study that R. padi prefers beer barley for fast and healthy development over other cereal crops. El áfido Rhopalosiphum padi L. (Homoptera: Aphididae) es una de las principales plagas de numerosos cultivos de la región semiárida pampeana de Argentina. En el presente trabajo se estudió el efecto de diferentes cereales incluidos Triticum aestivum L., ×Triticosecale Wittm., Hordeum vulgare L., Hordeum distichum L., Avena sativa L. and Secale cereale L. sobre los parámetros biológicos de R. padi en laboratorio. Se estimaron longevidad, tasa intrínseca de crecimiento natural (r m), tasa neta de reproducción (R0), tiempo generacional medio (T), tiempo de duplicación (TD), y tasa finita de incremento (λ) del pulgón de la avena en diferentes cereales. Las diferencias de los parámetros biológicos de R. padi entre los distintos cultivos fueron analizadas utilizando pseudovalores con la técnica de Jackknife. Los resultados indican que la cebada cervecera podría ser el cultivo más preferido por este áfido debido a la larga longevidad (20,88 d), la alta fecundidad (41 ninfas hembra-1), la alta tasa de incremento natural (0,309 hembras hembra-1 d-1), el corto tiempo de duplicación (2,24 d) y la baja mortalidad ninfal (22,2%). De los resultados obtenidos podemos inferir que R. padi tiene una mejor performance sobre la cebada cervecera que sobre el resto de cereales utilizados en este tr
Platón y el consentimiento informado contemporáneo
Lilian Chuaire,Magda Carolina Sánchez
Colombia Médica , 2007,
Abstract: El consentimiento informado es un concepto ético consustancial a la práctica y la investigación médica contemporáneas. En reconocimiento de su importancia, se examina la influencia de las ideas de Platón, tanto sobre su planteamiento como sobre sus alcances, en especial en lo que se refiere a la asociación entre el carácter del hombre libre y su derecho a tomar decisiones acerca de su salud.
Revisiting the X-Chromosome Inactivation and Its Impact on Female Longevity  [PDF]
Lilian Chuaire-Noack, Magda Carolina Sánchez-Corredor, María Martínez-Agüero
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.56067
Abstract:

X-chromosome inactivation is the genetic mechanism by which X-linked gene expression is equalized between the male and female genders of all placental mammal species. Given that the probability of mutant X-linked allele expression decreases as a result of the inactivation, it has been proposed that females have biological advantages relative to males. These advantages have grabbed the attention of the scientific community in recent years and have focused it on this topic and its clinical implications. To shed some new light on this intriguing phenomenon, this article reviews the most relevant molecular events involved in this process. These events include the role of Xist, the selection mechanism for future X-chromosome inactivation, the age-related inactivation skewing, and the relationship between inactivation and the emergence of X-linked diseases, possible treatments, and longevity.

PARTICLES ASSOCIATION STUDY OF A BORATE SAMPLE FROM SIJES DISTRICT, ARGENTINA
Torres Sánchez,Rosa M; Mattenella,Lilian E;
Ingeniare. Revista chilena de ingeniería , 2007, DOI: 10.4067/S0718-33052007000100005
Abstract: the increasing range of borate uses, mainly in the ceramic frit market, led borate producers to improve competitiveness through concentration and/or purification steps in the mill circuit as well as in the characterization of high content b2o3 minerals. minerals coming from sijes, salta province, argentina, mainly identified as colemanite and hydroboracite, with 50.84 % and 50.54 % b2o3 respectively, are potentially interesting from an industrial point of view. the desliming purification technique in hydrocyclones used to upgrade b2o3 and downgrade undesirable impurities to the borate market (rietveld method) mainly iron oxides, chlorides and sulphates) not only eliminates slimes but it also generates pores, through a decrease of the specific surface of the particles. two samples under different purification steps were analyzed: deslimed and without desliming. the chemical and mineralogical analyses of both samples indicate a decreasing percentage of colemanite, smectite and illite in the deslimed sample with a small increase of hibroracite. the parameters of surface electric charge (pzc and iep) match the observations made with the electronic microscopy, reveal mineral associations only in the sample without desliming.
Glucosa-6-fosfato deshidrogenasa (G6PD): Respuesta de los hematíes y otras células humanas a la disminución en su actividad
Bonilla,Javier Fernando; Sánchez,Magda Carolina; Chuaire,Lilian;
Colombia Médica , 2007,
Abstract: glucose-6-phosphate dehydrogenase is the first enzyme in the pentose phosphate pathway and the main intracellular source of reduced nicotidamineadenine nucleotidephosphate (nadph), involved in diverse physiological processes such as antioxidant defense, (for instance in the erythrocyte) endothelial growth modulation, erithropoyesis, vascularization and phagocitosis. g6pdh deficiency is the most common x-chromosome-linked enzymopathy in human beings. although it is present in any type cell, its absolute deficiency is incompatible with life. according to who, 400 million people are affected by g6pd deficiency in the world but in colombia, the severe form prevalence is about 3% to 7%. there are no data related to slight and moderate alterations, that also have clinical effects. this paper reviews some g6pd biomolecular aspects, its classification according to activity and electrophoretic mobility, as well assome main clinical aspects related to its activity alteration.
Reacción en cadena de la polimerasa y diagnóstico molecular
Villegas,Victoria Eugenia; Sánchez,Magda Carolina; Chuaire,Lilian;
Colombia Médica , 2009,
Abstract: pcr, acronym of polymerase chain reaction, has revolutionized the field of molecular diagnostics to the point that it currently represents the fastest-growing segment in clinical laboratories worldwide, where it has become an invaluable tool. this paper describes the fundamentals of pcr and its developments in some of its many applications in the diagnosis, from its beginnings to the present.
Producción de Mycoplasma gallisepticum empleando biorreactores de tipo tanque agitado
Lilian Sánchez,Tania Pérez,Ileana Rosado
Tecnología, Ciencia, Educación , 2002,
Abstract:
PARTICLES ASSOCIATION STUDY OF A BORATE SAMPLE FROM SIJES DISTRICT, ARGENTINA ESTUDIO DE LA ASOCIACIóN DE PARTíCULAS DE UNA MUESTRA DE BORATOS DEL DISTRITO SIJES, ARGENTINA
Rosa M Torres Sánchez,Lilian E Mattenella
Ingeniare : Revista Chilena de Ingeniería , 2007,
Abstract: The increasing range of borate uses, mainly in the ceramic frit market, led borate producers to improve competitiveness through concentration and/or purification steps in the mill circuit as well as in the characterization of high content B2O3 minerals. Minerals coming from Sijes, Salta Province, Argentina, mainly identified as colemanite and hydroboracite, with 50.84 % and 50.54 % B2O3 respectively, are potentially interesting from an industrial point of view. The desliming purification technique in hydrocyclones used to upgrade B2O3 and downgrade undesirable impurities to the borate market (Rietveld method) mainly iron oxides, chlorides and sulphates) not only eliminates slimes but it also generates pores, through a decrease of the specific surface of the particles. Two samples under different purification steps were analyzed: deslimed and without desliming. The chemical and mineralogical analyses of both samples indicate a decreasing percentage of colemanite, smectite and illite in the deslimed sample with a small increase of hibroracite. The parameters of surface electric charge (PZC and IEP) match the observations made with the electronic microscopy, reveal mineral associations only in the sample without desliming. La ampliación de los mercados que utilizan borato, principalmente el de la producción de fritas cerámicas, ha llevado a los productores de dicho mineral a mejorar su competitividad a través de su concentración y/o purificación tanto por medio de su molienda así como mediante la caracterización de minerales con alto contenido en B2O3. En los minerales provenientes de Sijes, Provincia de Salta, Argentina, se han identificado principalmente colemanita e hidroboracita, con 50.84% y 50.54% en B2O3, respectivamente, lo cual los hace potencialmente interesantes para su utilización industrial. La técnica de purificación por deslamado en hidrociclón para purificar B2O3, permite la disminución de impurezas indeseables para la comercialización del borato (óxidos principalmente férricos, cloruros y sulfatos). Esta técnica de purificación no sólo elimina las lamas presentes sino que además genera poros, mediante la disminución de la superficie específica de las partículas. En este trabajo se analizan dos muestras obtenidas en diferentes etapas de purificación: después y previo al deslamado. Los análisis químicos y mineralógicos (método de Rietveld) de ambas muestras indican la disminución del porcentaje de colemanita, esmectita e illita en la muestra deslamada, con un peque o aumento relativo del porcentaje de hidroboracita. Los parámetros de carga e
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