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Search Results: 1 - 10 of 594473 matches for " Julia María;Román Gutiérrez "
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Sistema de Notación Munsell y CIELab como herramienta para evaluación de color en suelos
Domínguez Soto, Julia María;Román Gutiérrez, Alma Delia;Prieto García, Francisco;Acevedo Sandoval, Otilio;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: the color is one of the most important morphological features, the most obvious, easy to determine and relevant taxonomic identification of soils. the color of soils is closely related with the solid components (organic matter, texture, mineralogical composition, morphology) being the transition metals, mainly those soils can provide this characteristic. munsell notation system and cielab are two techniques for determining the color of the soil. the aim of this study is to evaluate the physical, chemical and mineralogical properties of denganthza hill's soil, and its relationship with the characteristic color showed in the samples, using methods of assessment color munsell notation system and cielab spectrophotometric system. in the munsell notation system soils have colors from pale yellow to reddish to values <> between 2.5y, 5y, 2.5yr, 7.5y rand 10yr showing clear staining indicating a depletion of fe and mn, leading to suggest that due to palaeosols causes, there has been a podzolization process. in cielab color of the soils studied are located in quadrants +a* and +b* and correspond to red and yellow, the color of wet soils corresponds to a reddish-yellow, high a higher yellow saturation occurring in the soils 1, 6 and 13, the rest is a trend toward lighter shades, but in dry soils shows the same yellow-red, without saturation with light shades in all samples.
Evaluación de compuestos volátiles para estimar poblaciones del picudo de la guayaba Conotrachelus dimidiatus Evaluación de color en suelos del Cerro de Denganthza, municipio de Francisco I. Madero, Hidalgo
Julia María Domínguez Soto,Alma Delia Román Gutiérrez,Francisco Prieto García,Otilio Acevedo Sandoval
Acta Universitaria , 2012,
Abstract: Through experiments in Calvillo, Aguascalientes was determined that the populations of the guava weevil Conotrachelus dimidiatus can be estimated with pyramid traps baited with volatile compounds of guava. The attraction tests were conducted on commercial guava orchards for a period of five months during 2008 and 2009. The total catch of adults was higher in June and July of both years, with the beginning of the rainy season, decreasing towards the later months. The dispensers released the chemicals compounds up to 22 days depending on the mixture used. According to the results it is concluded that the strategy of trapping with chemical compounds can be an alternative to sample populations of the guava weevil. Additional compounds of the insect (pheromones) should be identified to increase the level of catches. Existen dos maneras de determinar el color del suelo: a) el uso de tablas de color utilizando el Sistema de Notación Munsell y b) el uso de analizadores de color, tal como el CieLab. Este último es capaz de medir el color y expresarlo en la notación de Munsell; ambas técnicas permiten la determinación del color del suelo. El objetivo de este estudio es evaluar el color de suelos húmedos y secos usando el sistema Munsell y el CIELab. Estos métodos se proponen para evaluar las diferencias de color en muestras de suelos de la localidad de Denganthza, en el municipio de Tepatepec de Francisco I. Madero, estado de Hidalgo, México durante el 2010. En el Sistema de Notación Munsell los suelos presentan coloraciones desde amarillo pálido a rojizas, para valores de <> se encuentra entre 2.5 Y, 5 Y, 2.5 YR, 7.5 YR y 10 YR mostrando coloraciones claras indicando un empobrecimiento de Fe y Mn, llevando a plantear que debido a causas pedogenéticas se ha producido un proceso de podzolización. En CieLab el color de los suelos estudiados se ubican en los cuadrantes +a* y +b* corresponden al color rojo y amarillo, el color de los suelos en húmedo corresponde a un color amarillo-rojizo, con mayor saturación en amarillo presentándose en los suelos 1, 6 y 13, en el resto se observa una tendencia hacia las tonalidades claras; sin embargo, en los suelos secos se presenta la misma coloración amarillo-rojizo sin satu-raciones con tonalidades claras en todas las muestras.
Sistema de Notación Munsell y CIELab como herramienta para evaluación de color en suelos Munsell Notation System and CIELab as a tool for evaluation colors in soils
Julia María Domínguez Soto,Alma Delia Román Gutiérrez,Francisco Prieto García,Otilio Acevedo Sandoval
Revista mexicana de ciencias agrícolas , 2012,
Abstract: El color es una de las características morfológicas más importantes, la más obvia, fácil de determinar y relevante en la identificación taxonómica de los suelos. El color de los suelos guarda una estrecha relación con los componentes sólidos (materia orgánica, textura, composición mineralógica, morfología); siendo los metales de transición, principalmente, los que pueden dotar a los suelos esta característica particular. El Sistema de Notación Munsell y CIELab, son dos técnicas que permiten la determinación del color del suelo. El objetivo de este estudio es evaluar las propiedades físicas, químicas y mineralógicas en suelo del cerro de Denganthza, y su relación son la coloración característica que presentan las muestras, usando como métodos de evaluación de color el Sistema de Notación Munsell y el Sistema Espectrofotométrico CIELab. En el Sistema de Notación Munsell los suelos presentan coloraciones desde amarillo pálido a rojizas, para valores de <> se encuentra entre 2.5Y, 5Y, 2.5YR, 7.5YR y 10YR mostrando coloraciones claras indicando un empobrecimiento de Fe y Mn, llevando a plantear que debido a causas pedogenéticas se ha producido un proceso de podzolización. En CIELab el color de los suelos estudiados se ubican en los cuadrantes +a* y +b* corresponden al color rojo y amarillo, el color de los suelos en húmedo corresponde a un color amarillo-rojizo, con mayor saturación en amarillo presentándose en los suelos 1, 6 y 13, en el resto se observa una tendencia hacia las tonalidades claras; sin embargo, en los suelos secos se presenta la misma coloración amarillo-rojizo, sin saturaciones con tonalidades claras en todas las muestras. The color is one of the most important morphological features, the most obvious, easy to determine and relevant taxonomic identification of soils. The color of soils is closely related with the solid components (organic matter, texture, mineralogical composition, morphology) being the transition metals, mainly those soils can provide this characteristic. Munsell Notation System and CIELab are two techniques for determining the color of the soil. The aim of this study is to evaluate the physical, chemical and mineralogical properties of Denganthza hill's soil, and its relationship with the characteristic color showed in the samples, using methods of assessment color Munsell Notation System and CIELab Spectrophotometric System. In the Munsell Notation System soils have colors from pale yellow to reddish to values <> between 2.5Y, 5Y, 2.5YR, 7.5Y Rand 10YR showing clear staining indicating a depletion of Fe and Mn, leading t
DESARROLLO Y EVALUACIóN DE UN POSTRE LáCTEO CON FIBRA DE NARANJA PREPARATION AND EVALUATION OF A MILK DESSERT WITH ORANGE FIBER
Olga L MARTíNEZ A,María O ROMáN M,Ester L GUTIéRREZ E,Gilma B MEDINA M
Vitae , 2008,
Abstract: El consumo de fibra dietaria se ha asociado con propiedades de alimentos funcionales porque provee condiciones que favorecen la salud intestinal, la prevención de cáncer de colon, las enfermedades cardiovasculares y ayuda en el mantenimiento del peso. En el presente estudio se busca elaborar y evaluar un postre lácteo adicionado con fibra de residuos resultantes de la separación de pulpa de naranja. Se selecciona la fibra de naranja como materia prima para la elaboración de postres, ya que se trata de una buena fuente de fibra dietaria tanto soluble como insoluble; además, en la caracterización sensorial, realizada por jueces entrenados, se encuentra que esta fibra presenta olor y aroma propios de la fruta y características texturales bucales agradables. El análisis proximal muestra que la fibra de naranja contiene un 59.1 % de fibra dietaria total FDT y la fracción soluble FDS es de 27.5 %, con buen contenido de hierro y fósforo y otros nutrientes a excepción de la grasa cruda. Desde el punto de vista tecnológico es factible incorporar hasta un 5.0 % de fibra de naranja en el postre lácteo, el cual presenta un 2.1 % de grasa láctea, 7.3 de sólidos lácteos y un 25.3 % de sólidos totales. El perfil del sabor muestra que el postre con fibra de naranja presenta una calidad sensorial media. Los descriptores de sabor que presenta este producto son: naranja, cítrico, ácido, dulce, cocido y con un sabor residual amargo. Los descriptores de textura percibidos son: húmedo, blando, masticable y fibroso. Este nuevo producto alimenticio aporta los nutrientes propios y una cantidad adicional de fibra, lo que lo convierte en alimento saludable y una alternativa agradable, sencilla y económica para que las personas incrementen el consumo diario de fibra dietaria. Además, mediante el aprovechamiento de los residuos de la transformación de naranja se contribuye a disminuir la contaminación ambiental. The consumption of dietary fiber has been associated with functional food properties which improves people's intestinal health. It also contributes towards the prevention of colon cancer, cardiovascular diseases, and weight control. The purpose of this study is to prepare and evaluate a milk dessert added with fiber from residues resulting from orange pulp separation. Orange fiber is selected as a raw material to prepare desserts because orange is a good source of soluble and insoluble dietary fiber and besides in the sensorial characterization made by trained judges, it was found that this fiber has odor and aroma of the fruit -the orange- and pleasant textural mouth charac
SIMULACIóN MATEMáTICA DE UN DIGESTOR ANAEROBIO TIPO TANQUE AGITADO PARA EL TRATAMIENTO DE VERTIDOS RESIDUALES
Jorge DEL REAL OLVERA,Francisco PRIETO GARCíA,Eva María SANTOS LóPEZ,Alma Delia ROMáN GUTIéRREZ
Revista internacional de contaminación ambiental , 2009,
Abstract: En los últimos a os, el modelado matemático ha sido empleado para tratar de representar los cambios químicos que ocurren en el ambiente. Tradicionalmente los modelos se fundamentan en los balances de materia y la cinética química de los bioprocesos. En este estudio se aplican y simulan las ecuaciones obtenidas para un reactor biológico isotérmico tipo tanque agitado mediante ecuaciones lineales adimensionales en estado semi-estacionario. Para darle validez a los resultados derivados de la solución analítica, estos se comparan con los resultados experimentalmente obtenidos a nivel laboratorio para un digestor metanogénico en el régimen mesofílico de temperatura y en donde se trataron los vertidos residuales provenientes de una industria alcoholera bajo diferentes condiciones de operación, empleando como consorcio microbiano fluido ruminal vacuno. Los resultados del modelo concuerdan favorablemente bien con la producción de biogás y la disminución de la carga orgánica (expresada como DQO), teniendo un factor de ajuste promedio para ambos casos de R2=0.9960 y una variación del 0.01601, cuando se propone una cinética de reacción de primer orden y empleando en el medio células libres. Además que dicho modelo es capaz de predecir cuándo el sistema alcanza el estado estacionario.
Efectos hemodinámicos de la supresión del propranolol en ratas
Chaple La Hoz,Manuel; Barber Gutiérrez,Ernesto; Román Aldama,Wilfrido; Castillo Herrera,José; Fox Pascual,María Ofelia; Barber Fox,María Ofelia;
Revista Cubana de Investigaciones Biom??dicas , 1996,
Abstract: the effect of the suppression of the treatment with propranolol (0,5 mg/100 g rat/day) in aquous solution on blood volume and other hemodynamic variables was studied in 20 white rats. at the same time 20 con-trols were carried out to which distilled water was administered. the systolic arterial pressure was measured 20 days after the beginning of treatment, and 20 and 45 days after its suppression. 45 days after the drug's suppression, blood volume was measured in a subgroup of ten, using evans' blue as an indicator substance. mean arterial pressure, mean circulatory pressure, and central venous pressure were measured in the other subgroup by using a 4-channel polygraph. as a result, a marked increase of blood volume, plasma volume, and heart frequency was obtained. a highly significant rise of mean arterial pressure, systolic arterial pressure, central venous pressure, and mean circulatory pressure was also observed. according to the results, it is concluded that propranolol's suppression causes hydrosaline retention resulting from tubular hypertrophy, which could make even more clear the role of kidney in essential arterial hypertension.
DESARROLLO Y EVALUACIóN DE UN POSTRE LáCTEO CON FIBRA DE NARANJA
MARTíNEZ A,Olga L; ROMáN M,María O; GUTIéRREZ E,Ester L; MEDINA M,Gilma B; CADAVID C,Margarita; FLóREZ A,óscar A;
Vitae , 2008,
Abstract: the consumption of dietary fiber has been associated with functional food properties which improves people's intestinal health. it also contributes towards the prevention of colon cancer, cardiovascular diseases, and weight control. the purpose of this study is to prepare and evaluate a milk dessert added with fiber from residues resulting from orange pulp separation. orange fiber is selected as a raw material to prepare desserts because orange is a good source of soluble and insoluble dietary fiber and besides in the sensorial characterization made by trained judges, it was found that this fiber has odor and aroma of the fruit -the orange- and pleasant textural mouth characteristics. proximal analysis shows that orange fiber has 59.1 % of total dietary fiber, and the soluble fraction is 27.5 %, with a good content of iron, phosphorus, and other nutrients, except for raw grease. from the technological point of view, it is feasible to incorporate until 5.0 % of orange fiber in the milk dessert, which presents 2.1 % of milk fat, 7.3 of milk solids, and a 25.3 % of total solids. the taste profile shows that the dessert with orange fiber has a medium sensorial quality. taste describers of this product are: orange, citric, sour, sweet, cooked, and with a residual bitter flavor. texture describers perceived are: humid, soft, masticable, and fibrous. this new food contributes with its own nutrients and with an additional quantity of fibers which make it a healthy food and are a pleasant, simple, and economic alternative, so people can increase their daily intake of dietary fiber. besides, through the use of residues in orange transformation, environmental pollution can be decreased.
Estudio de variables morfofuncionales renales en jóvenes con hipertensión arterial primaria
Chaple La Hoz,Manuel; Barber Gutiérrez,Ernesto; Rey Avila,Saúl; Román Aldama,Wilfrido; Castillo Herrera,José; Chauvín Roche,Antonio; Barber Fox,María O;
Revista Cubana de Investigaciones Biom??dicas , 1996,
Abstract: the role of the kidney in the genesis of essential arterial hypertension, has been investigated since more than three decades. the purposes of this article was to assess the behaviour of some renal morphofunctional variables in hypertensive patients. the effective renal plasma flow (erpf) was studied in 40 normal volunteers and 45 hypertensive patients, by means of the paraamino-hippurate clearance, glomerular filtration rate (gfr) by means of creatinine clearance, lithium plasma clearance lipc), lithium reabsorption fraction (lirf), sodium and potassium renal management, as well as the ultrasonographic measurement of anteroposterior, transverse and longitudinal renal diameters, with which the kidneys volume was determined by a computed program. the results showed significant differences in erpf, the renal diameters and the integrated volume, as well as in the sodium management. these outcomes suggest a hydrosaline retention in the hypertensive patients, and this advocates the hypothesis that they restore the kidney participation in the genesis of arterial hypertension.
Bioacumulación de arsénico en las etapas de desarrollo de la cebada maltera (Hordeum distichon L.)
Prieto García, Francisco;Prieto Méndez, Judith;Callejas Hernández, Judith;Román Gutiérrez, Alma Delia;Méndez Marzo, María Aurora;
Revista mexicana de ciencias agrícolas , 2010,
Abstract: the contamination by arsenic in water and ground of zimapán, hidalgo, mexico, causes that malt barley (hordeum distichon l.) grown in this region, accumulates this element. the objective was to measure the levels of arsenic accumulated in organs and tissues of barley under controlled conditions, at different stages of development. malt barley cv. esmeralda was grown in 25 pots, five pots per differentiated trial. trials include negative (not contaminated ground and water) and positive controls. five plants by pot were used and the accumulation of arsenic in each one was evaluated in five organs: root, stem, leaf, glean and grain, at each of five stages of development (coleoptiles formation or first leaf, macollo or true leaves from an armpit first knot that becomes present separated from the ground and forms the first spike, formation of spikes and seed filling). a random block design with three treatments was used: with arsenic, positive control and negative control. malt barley presented high accumulation of arsenic at different stages of development, directly proportional to the time of exposition. roots presented the highest accumulation of arsenic (100 and 300 mg kg-1), followed by leaves (80 to 180 mg kg-1) and stem (70 to 110 mg kg-1). the level of accumulation of arsenic in grains was between 40-90 mg kg-1, amount that according to argentinean norms can be considered as highly contaminated. for the bioaccumulation index (bi), the leaves presented the high values, classified as medium values (0.1-1) for green plants. this organ can be indicative of contamination level in the ground. the largest values for the bi were observed in the stem, this organ can be a malt barley specific indicator of the level of arsenic contamination.
Simulación matemática de un digestor anaerobio tipo tanque agitado para el tratamiento de vertidos residuales
DEL REAL OLVERA, Jorge;PRIETO GARCíA, Francisco;SANTOS LóPEZ, Eva María;ROMáN GUTIéRREZ, Alma Delia;GORDILLO MARTíNEZ, Alberto José;
Revista internacional de contaminación ambiental , 2009,
Abstract: in the last years, mathematical modeling has been used to try to represent the chemical changes that occur in the environment. traditionally the models are based on the mass balance and the kinetic chemistry of the bioprocesses. in this study the equations obtained for a biological isothermal reactor type shaken tank are applied and simulated by using adimensional linear equations in quasi-stationary state. in order to give validity to the results derived from the analytical solution, these are compared with the results experimentally obtained at laboratory level for a methanogenic digester in a mesophyll regime of temperature, used for treating residual effluents from the distillery industry under different operational conditions, using as microbial partnership bovine rumen fluid. the results of the model agree with the production of biogas and the reduction of organic charge (expressed like cod), having an average factor of adjustment for both cases of r2=0.9960 and a variation of 0.01601, when a kinetic reaction of first order is proposed, and using free cells in the environment. in addition this model is able to predict when the system reaches the stationary state.
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