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Search Results: 1 - 10 of 130639 matches for " V. Urtuvia Gatica "
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Desarrollo de producto sobre la base de harinas de cereales y leguminosa para ni?os celíacos entre 6 y 24 meses; I: Formulación y aceptabilidad
Cerezal Mezquita,P.; Urtuvia Gatica,V.; Ramírez Quintanilla,V.; Romero Palacios,N.; Arcos Zavala,R.;
Nutrición Hospitalaria , 2011,
Abstract: the revaluation of the andean cultivations, quinua (chenopodium quinua willd) and lupin (lupinus albus l.), to be used in nutritional mixtures, with traditional cereals like corn (zea mays l.) and rice (oryza sativa l.), originate mixtures without gluten which constitute a good alternative for the nutrition of children under 24 months that suffer from celiac disease, since they improve the quality of the protein, by essential amino acids compensation, and also impacts in the product's diversification strategy. in the present work, the percentage composition of each flour in the mixture was determined by means of linear programming by means of the solver form from the excel spreadsheet. prolamines were determined in the quinua and lupin flours by the elisa test and the hplc technique was used in both products obtained called "sweet mix" and "dessert mix", to define the quantity of amino acids with the purpose of providing around the 15% of the proteins required in the day. the flour mixtures selected as optimum, sweet mix, suitable for the preparation of sweet pancakes, as well as for the dessert mix, that by addition of water or milk produce a semi solid dessert, were evaluated after three months of storage, being acceptable their microbiological, bromatological and sensorial requirements, corroborating the results with the good acceptance of the products, prepared from the formulated mixtures, by the children of two day care centers of the city of antofagasta-chile.
Desarrollo de producto sobre la base de harinas de cereales y leguminosa para ni?os celíacos entre 6 y 24 meses; II: Propiedades de las mezclas
Cerezal Mezquita,P.; Urtuvia Gatica,V.; Ramírez Quintanilla,V.; Arcos Zavala,R.;
Nutrición Hospitalaria , 2011,
Abstract: the nutritional formulations of high protein content, provided by a flour mixture from two andean cultures, quinua (chenopodium quinua willd) and lupino (lupinus albus l), with two traditional cereals, maize (zea mays l.) and rice (oryza sativa l.), entailed to the preparation of a "sweet mixture" for the elaboration of "queques" and another "dessert mixture" flavoured with banana, that can be prepared with water or milk, constituted a good alternative as food supplement for the nutrition of children aged 6-24 months who suffer from celiac disease, since they contribute to the quality improvement of the protein, by essential amino acids compensation, they are of low cost and allow an increase in availability of products for gluten-intolerant children. some physical, chemical, rheological, mechanical and fluidity properties, as well as the color of these mixtures for a period of conservation of 90 days were evaluated. at the end of the storage, the sweet mixture turned out to be of "little flow" and the dessert mixture changed from "little flow" to "easy flow". viscosity for the dessert mixture, with its two types of dilutions, water and milk, presented a behavior of pseudoplastic fluid. it was possible to guess that the time of shelf life of the mixtures would be of 9 months before achieving the rancidity limit (10 meq of oxigen/kg of fat, which would disqualify the product for consumption). the ciel*a*b* color coordinates did not show significant differences keeping the colour in "a beige" tonality.
Desarrollo de producto sobre la base de harinas de cereales y leguminosa para ni os celíacos entre 6 y 24 meses; I: Formulación y aceptabilidad Product development on the basis of cereal and leguminous flours to coeliac disease in children between 6-24 months; I: formulation and acceptability
P. Cerezal Mezquita,V. Urtuvia Gatica,V. Ramírez Quintanilla,N. Romero Palacios
Nutrición Hospitalaria , 2011,
Abstract: La revalorización de los cultivos andinos, quinua (Chenopodium quinua Willd) y lupino (Lupinus albus L), para ser utilizados en mezclas alimenticias, con cereales tradicionales como maíz (Zea mays L.) y arroz (Oryza sativa L.), originan mezclas sin gluten que constituyen una buena alternativa para la alimentación de ni os menores de 24 meses que sufren la enfermedad celíaca, ya que mejoran la calidad de la proteína, por compensación de los aminoácidos esenciales, e incide en la diversificación de productos. En el presente trabajo se determinó la composición de los porcentajes de cada harina en la mezcla mediante Programación Lineal empleando la planilla Solver de la hoja de cálculo Excel. Se determinaron las prolaminas en las harinas de quinua y lupino por el método ELISA y se empleó la técnica del HPLC en los dos productos obtenidos, denominados "mezcla dulce" y "mezcla postre", para definir la cantidad de aminoácidos con la finalidad de suplementar alrededor del 15% de las proteínas requeridas en el día. Las mezclas de harina seleccionadas como óptimas, mezcla dulce, apropiada para la preparación de queques, así como para la mezcla postre, que por adición de agua o leche, da origen a un postre, se evaluaron después de tres meses de almacenamiento, siendo aceptables sus requisitos microbiológicos, bromatológicos y sensoriales, corroborándose los resultados, con la buena aceptación de los productos preparados a partir de las mezclas formuladas, por parte de los menores de 2 Jardines Infantiles de la Ciudad de Antofagasta-Chile. The revaluation of the Andean cultivations, quinua (Chenopodium quinua Willd) and lupin (Lupinus albus L.), to be used in nutritional mixtures, with traditional cereals like corn (Zea mays L.) and rice (Oryza sativa L.), originate mixtures without gluten which constitute a good alternative for the nutrition of children under 24 months that suffer from celiac disease, since they improve the quality of the protein, by essential amino acids compensation, and also impacts in the product's diversification strategy. In the present work, the percentage composition of each flour in the mixture was determined by means of Linear Programming by means of the Solver form from the Excel spreadsheet. Prolamines were determined in the quinua and lupin flours by the ELISA test and the HPLC technique was used in both products obtained called "sweet mix" and "dessert mix", to define the quantity of amino acids with the purpose of providing around the 15% of the proteins required in the day. The flour mixtures selected as optimum, sweet mix, suitabl
Desarrollo de producto sobre la base de harinas de cereales y leguminosa para ni os celíacos entre 6 y 24 meses; II: Propiedades de las mezclas Product development on the basis of cereal and leguminous flours to coeliac disease in children aged 6-24 months; II: properties of the mixtures
P. Cerezal Mezquita,V. Urtuvia Gatica,V. Ramírez Quintanilla,R. Arcos Zavala
Nutrición Hospitalaria , 2011,
Abstract: Las formulaciones alimenticias de alto contenido proteico, aportado por una mezcla de harinas a partir de dos cultivos andinos, quinua (Chenopodium quinua Willd) y lupino (Lupi-nus albus L), con dos cereales tradicionales maíz (Zea mays L.) y arroz (Oryza sativa L.), conllevaron a la preparación de una 'mezcla dulce' para la elaboración de queques y otra "mezcla postre" saborizada con plátano, que puede ser preparada con agua o con leche, constituyeron una buena alternativa como suplemento alimenticio para la nutrición de ni os entre 6 y 24 meses que sufren la enfermedad celíaca, ya que contribuyen al mejoramiento de la calidad de la proteína, por compensación de los aminoácidos esenciales, son de bajo costo y permite un aumento en la disponibilidad de productos para los ni os intolerantes al gluten. Se realizó la evaluación de algunas propiedades físicas, químicas, reológicas, mecánicas y de fluidez, así como el color de estas mezclas para un período de conservación de 90 días. Al finalizar el almacenamiento, la mezcla dulce resultó ser de "poco flujo" y la mezcla postre pasó de "poco flujo" a "flujo fácil". La viscosidad para la mezcla postre, con sus dos tipos de diluyentes, agua y leche, presentó un comportamiento de fluido pseudoplástico. Se pudo estimar que el tiempo de vida útil de las mezclas sería de 9 meses antes de llegar al límite de rancidez (10 mEq de oxígeno/kg de grasa, que inhabilitaría el producto para el consumo). Las coordenadas de color CIEL*a*b* no presentaron diferencias significativas manteniéndose el color en una tonalidad "beige". The nutritional formulations of high protein content, provided by a flour mixture from two Andean cultures, quinua (Chenopodium quinua Willd) and lupino (Lupinus albus L), with two traditional cereals, maize (Zea mays L.) and rice (Oryza sativa L.), entailed to the preparation of a "sweet mixture" for the elaboration of "queques" and another "dessert mixture" flavoured with banana, that can be prepared with water or milk, constituted a good alternative as food supplement for the nutrition of children aged 6-24 months who suffer from celiac disease, since they contribute to the quality improvement of the protein, by essential amino acids compensation, they are of low cost and allow an increase in availability of products for gluten-intolerant children. Some physical, chemical, rheological, mechanical and fluidity properties, as well as the color of these mixtures for a period of conservation of 90 days were evaluated. At the end of the storage, the sweet mixture turned out to be of "little flow" and th
Síndrome de lisis de glóbulos blancos después de un trasplante autólogo de células troncales hematopoyéticas en el tratamiento de la amiloidosis AL renal: Caso clínico
Gatica M,Antonio; Bertin C,Pablo; Tagle V,Rodrigo;
Revista médica de Chile , 2006, DOI: 10.4067/S0034-98872006000600013
Abstract: the treatment of al amyloidosis was not successful until the advent of myeloablative chemotherapy consisting of high-dose intravenous melphalan followed by autologous peripheral blood stem cell transplantation. this new treatment has achieved better survival rates and, remarkably, it has obtained complete remission. among patients with renal involvement, achievement of a complete hematological response was associated with a 50% reduction in proteinuria and stable creatinine clearance in more than 2/3 of patients. despite of these excellent results, this new therapy is associated with significant toxicity, including the development of acute renal failure due to white blood cell lysis syndrome. we report a 59 year-old female with a nephrotic syndrome due to primary amyloidosis successfully treated autologous stem cell transplantation who developed acute renal failure caused by white blood cell lysis syndrome. the patient required treatment with granulocytic colony stimulating factor and intermittent hemofiltration and was discharged 23 days after melphalan administration with a satisfactory renal function and white blood cell count. after one year of follow up, she maintains a good glomerular filtration rate, a proteinuria of less than, 1 g/day and normal hematological values
Síndrome de lisis de glóbulos blancos después de un trasplante autólogo de células troncales hematopoyéticas en el tratamiento de la amiloidosis AL renal: Caso clínico White blood cell lysis syndrome after autologous peripheral blood stem cell transplantation in the treatment of renal AL amyloidosis: Case report
Antonio Gatica M,Pablo Bertin C,Rodrigo Tagle V
Revista médica de Chile , 2006,
Abstract: The treatment of AL amyloidosis was not successful until the advent of myeloablative chemotherapy consisting of high-dose intravenous melphalan followed by autologous peripheral blood stem cell transplantation. This new treatment has achieved better survival rates and, remarkably, it has obtained complete remission. Among patients with renal involvement, achievement of a complete hematological response was associated with a 50% reduction in proteinuria and stable creatinine clearance in more than 2/3 of patients. Despite of these excellent results, this new therapy is associated with significant toxicity, including the development of acute renal failure due to white blood cell lysis syndrome. We report a 59 year-old female with a nephrotic syndrome due to primary amyloidosis successfully treated autologous stem cell transplantation who developed acute renal failure caused by white blood cell lysis syndrome. The patient required treatment with granulocytic colony stimulating factor and intermittent hemofiltration and was discharged 23 days after melphalan administration with a satisfactory renal function and white blood cell count. After one year of follow up, she maintains a good glomerular filtration rate, a proteinuria of less than, 1 g/day and normal hematological values
Automatically Generated Algorithms for the Vertex Coloring Problem
Carlos Contreras Bolton, Gustavo Gatica, Víctor Parada
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0058551
Abstract: The vertex coloring problem is a classical problem in combinatorial optimization that consists of assigning a color to each vertex of a graph such that no adjacent vertices share the same color, minimizing the number of colors used. Despite the various practical applications that exist for this problem, its NP-hardness still represents a computational challenge. Some of the best computational results obtained for this problem are consequences of hybridizing the various known heuristics. Automatically revising the space constituted by combining these techniques to find the most adequate combination has received less attention. In this paper, we propose exploring the heuristics space for the vertex coloring problem using evolutionary algorithms. We automatically generate three new algorithms by combining elementary heuristics. To evaluate the new algorithms, a computational experiment was performed that allowed comparing them numerically with existing heuristics. The obtained algorithms present an average 29.97% relative error, while four other heuristics selected from the literature present a 59.73% error, considering 29 of the more difficult instances in the DIMACS benchmark.
Histology of somatic embryogenesis in rice (Oryza sativa cv. 5272)
Vega,Rafael; Vásquez,Nelly; Espinoza,Ana M; Gatica,Andrés M; Valdez-Melara,Marta;
Revista de Biología Tropical , 2009,
Abstract: rice (oryza sativa cv. 5272) embryogenic calli were obtained from mature zygotic embryos culture on murashige & skoog (1962) medium supplemented with 2.5 mg/l 2,4- dichlorophenoxyacetic acid. histological analysis of somatic embryogenesis revealed that after two weeks of culture of explants on the callus induction medium, somatic embryo development began with a cluster of proembryogenic cells in the peripheral region of the calli. the outer cell layer of embryogenic calli consisted of small and isodiametric cells with a dense cytoplasm and a prominent nucleus and nucleolus; whereas the inner cell layer is composed of large cells with small nucleus and large vacuole. these embryogenic cells underwent a series of organized divisions and formed the proembryo with a well-defined protodermis. rev. biol. trop. 57 (suppl. 1): 141-150. epub 2009 november 30.
Histology of somatic embryogenesis in rice (Oryza sativa cv. 5272)
Rafael Vega,Nelly Vásquez,Ana M Espinoza,Andrés M Gatica
Revista de Biología Tropical , 2009,
Abstract: Rice (Oryza sativa cv. 5272) embryogenic calli were obtained from mature zygotic embryos culture on Murashige & Skoog (1962) medium supplemented with 2.5 mg/l 2,4- dichlorophenoxyacetic acid. Histological analysis of somatic embryogenesis revealed that after two weeks of culture of explants on the callus induction medium, somatic embryo development began with a cluster of proembryogenic cells in the peripheral region of the calli. The outer cell layer of embryogenic calli consisted of small and isodiametric cells with a dense cytoplasm and a prominent nucleus and nucleolus; whereas the inner cell layer is composed of large cells with small nucleus and large vacuole. These embryogenic cells underwent a series of organized divisions and formed the proembryo with a well-defined protodermis. Rev. Biol. Trop. 57 (Suppl. 1): 141-150. Epub 2009 November 30. Los estudios anatómicos e histológicos de los callos embriogénicos de arroz (Oryza sativa) mostraron que estos se originan del epitelio escutelar de los embriones cigóticos maduros. Al crecer en un medio Murashige y Skoog (1962) suplementado con 2.5 mg/l 2,4-D, presentan grupos de células embriogénicas en las zonas periféricas, las cuales a su vez darán lugar a la formación de proembriones y de embriones somáticos. Las células de los callos embriogénicos se caracterizan por tener núcleo y nucleolo conspícuos, forma isodiámetrica, citoplasma denso y están acompa adas de células adyacentes con abundantes gránulos de almidón. Los embriones somáticos completan su desarrollo para dar formación a plántulas completas, al estar en un medio de regeneración. Los estudios histológicos permitieron observar la expresión transitoria del gen uidA en grupos de células de las capas más externas de los callos embriogénicos sometidos al método de transformación genética por biobalística.
Near-infrared thermal emissivity from ground based atmospheric dust measurements at ORM
G. Lombardi,V. Zitelli,S. Ortolani,J. Melnick,A. Ghedina,A. Garcia,E. Molinari,C. Gatica
Physics , 2011, DOI: 10.1111/j.1365-2966.2011.19152.x
Abstract: We present an analysis of the atmospheric content of aerosols measured at Observatorio del Roque de los Muchachos (ORM; Canary Islands). Using a laser diode particle counter located at the Telescopio Nazionale Galileo (TNG) we have detected particles of 0.3, 0.5, 1.0, 3.0, 5.0 and 10.0 um size. The seasonal behavior of the dust content in the atmosphere is calculated. The Spring has been found to be dustier than the Summer, but dusty conditions may also occur in Winter. A method to estimate the contribution of the aerosols emissivity to the sky brightness in the near-infrared (NIR) is presented. The contribution of dust emission to the sky background in the NIR has been found to be negligible comparable to the airglow, with a maximum contribution of about 8-10% in the Ks band in the dusty days.
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