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Search Results: 1 - 10 of 5808 matches for " Juana; Ribas ávila "
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Actividad antiinflamatoria de extractos de derivados de la ca?a de azúcar
Tillán Capó,Juana; Ribas ávila,María del Carmen; Castro Méndez,Irma; Carrillo Domínguez,Carmen;
Revista Cubana de Plantas Medicinales , 2002,
Abstract: wistar rats were used in the acute edema of the paw induced by subplantar injection of 0.1 ml of carrageen to evaluate the antiinflammatory activity of dry ethanol extract from sugar cane wax (scee) 500 and 1000 mg/kg, ethanol extract from sugar cane wax obtained in the proportion 1:5 (scee5) and 1:10 (scee10) fresh sample, 200 mg/kg, ethanol extract obtained from cachaza (chee) 500 and 1 000 mg/kg, raw wax (rw) 200 mg/kg, and cachaza oil without solvent (cho) 2.5 and 5.0 ml/kg. the solid substances were prepared at 20 % in propylenglycol and the intraperitoneal administration was used in all cases 30 min before the edema induction. it was observed that dry wax and the dry and fresh ethanol extracts produced a significant reduction of the edema of the rat's paw induced by carrageen. as regards cachaza, only the ethanol extract and the oil assayed at doses of 500 mg/kg and 2.5 ml/kg of body weight, respectively, did not show any marked reduction of edema. it was concluded that the antiinflamatory susbstances are mostly found in wax and that the ratio wax:ethanol 1:5 may be used to obtain them.
Actividad antiinflamatoria de extractos de derivados de la ca a de azúcar
Juana Tillán Capó,María del Carmen Ribas ávila,Irma Castro Méndez,Carmen Carrillo Domínguez
Revista Cubana de Plantas Medicinales , 2002,
Abstract: Se emplearon ratas Wistar en el edema agudo de la pata inducido por inyección subplantar de 0,1 mL de carragenina para evaluar la actividad antiinflamatoria de extracto estanólico de la cera de ca a seco (EECC) 500 y 1 000 mg/kg, extracto etanólico de la cera de ca a extraído en la proporción 1:5 (EECC5) y 1:10 (EECC10) muestra fresca, 200 mg/kg, extracto etanólico obtenido de la cachaza (EECH) 500 y 1 000 mg/kg, cera cruda (CC) 200 mg/kg y aceite de cachaza sin solvente (ACH) 2,5 y 5,0 mL/kg; las sustancias sólidas se prepararon al 20 % en propilenglicol y en todos los casos se utilizó la administración intraperitoneal 30 min antes de la inducción del edema. Se tuvo como resultado que tanto la cera cruda como los extractos etanólicos secos y los frescos mostraron disminución significativa del edema de la pata de la rata inducido por carragenina. En el caso de la cachaza solo el extracto etanólico y el aceite ensayados a las dosis de 500 mg/kg y 2,5 mL/kg de peso corporal respectivamente no mostraron disminución significativa del edema. Los resultados anteriores indicaron que las sustancias antiinflamatorias se encuentran en mayor proporción en la cera y es posible utilizar la relación cera:etanol 1:5 para obtener estas. Wistar rats were used in the acute edema of the paw induced by subplantar injection of 0.1 mL of carrageen to evaluate the antiinflammatory activity of dry ethanol extract from sugar cane wax (SCEE) 500 and 1000 mg/kg, ethanol extract from sugar cane wax obtained in the proportion 1:5 (SCEE5) and 1:10 (SCEE10) fresh sample, 200 mg/kg, ethanol extract obtained from cachaza (CHEE) 500 and 1 000 mg/kg, raw wax (RW) 200 mg/kg, and cachaza oil without solvent (CHO) 2.5 and 5.0 mL/kg. The solid substances were prepared at 20 % in propylenglycol and the intraperitoneal administration was used in all cases 30 min before the edema induction. It was observed that dry wax and the dry and fresh ethanol extracts produced a significant reduction of the edema of the rat's paw induced by carrageen. As regards cachaza, only the ethanol extract and the oil assayed at doses of 500 mg/kg and 2.5 mL/kg of body weight, respectively, did not show any marked reduction of edema. It was concluded that the antiinflamatory susbstances are mostly found in wax and that the ratio wax:ethanol 1:5 may be used to obtain them.
Survey on collaborative planning in the supply chain: Deterministic and uncertain environment Estado del arte de la planificación colaborativa en la cadena de suministro: Contexto determinista e incierto
Imma Ribas Vila,Ramon Companys Pascual
Intangible Capital , 2007, DOI: 10.3926/ic.30
Abstract: The current globalization forces to the companies and the current technology allow them to have warehouse and distribution centers, own or subcontracted that can be dispersed geographically. The synchronization of the diverse partners involved in the Supply Chain (SC) requires a Collaborative Planning with the purpose of work coordinated to be able to satisfy the demands of a more and more competitive market. In this work papers with respect to the collaborative planning in the supply chain are revised analyzing strategic aspects, like they can be the types, forms, relationships or benefits of the collaboration and tactical such aspects as the planning, material requirement and scheduling. The different models proposed to formalize the collaborative planning among the different partners in the SC are analyzed. La globalización actual obliga a las empresas y la tecnología actual les permite tener centros de almacenaje y distribución, propios o subcontratados, que pueden estar dispersos geográficamente. La sincronización de los diversos agentes involucrados en la cadena de suministro (CdS) requiere una Planificación Colaborativa con el fin de realizar un trabajar coordinado para poder satisfacer las exigencias de un mercado cada vez más competitivo. En este trabajo se revisa la literatura referente a la planificación colaborativa en la cadena de suministro analizando aspectos estratégicos, como pueden ser los tipos, formas, relaciones o beneficios de la colaboración y aspectos tácticos tales como la planificación, el cálculo de necesidades y la programación. Se analizan los diferentes modelos propuestos para formalizar la planificación colaborativa entre los diferentes socios que integran la CdS.
A hybrid flow shop model for an ice cream production scheduling problem
Imma Ribas Vila,Ramon Companys Pascual
Journal of Industrial Engineering and Management , 2009, DOI: 10.3926/jiem..v2n1.p60-89
Abstract: In this paper we address the scheduling problem that comes from an ice cream manufacturing company. This production system can be modelled as a three stage nowait hybrid flow shop with batch dependent setup costs. To contribute reducing the gap between theory and practice we have considered the real constraints and the criteria used by planners. The problem considered has been formulated as a mixed integer programming. Further, two competitive heuristic procedures have been developed and one of them will be proposed to schedule in the ice cream factory.
Medio siglo de cambios paisajísticos en la monta a mediterránea. Percepción y valoración social del paisaje en la alta Garrotxa (Girona)
Vila Subirós, J.,Ribas Palom, A.,Varga Linde, D.,Llausàs Pascual, A.
Pirineos : Revista de Ecología de Monta?a , 2009,
Abstract: Rural depopulation and abandonment of farming activities have resulted in an intense transformation of the characteristic landscapes of Mediterranean mountains. A dynamic characterized by an intense process of expansion of forested cover in detriment to livestock and agricultural areas. This process, which produces effects such as biodiversity and cultural heritage loss and contributes to the spread of wildfires, can be mapped, quantified and described with high accuracy through the means of digital mapping, geographic information systems and landscape indexes. But what is the perception and valuation of these changes by the stakeholders involved in the management of these territories? This article attempts to answer this question in the protected area of Alta Garrotxa (Girona), where a strong correlation between landscape dynamics and their perception by the stakeholders is revealed. On the other hand, the valuation and future prospects produce diverse and often contradictory points of views that illustrate the existing difficulties to management. El despoblamiento rural y el abandono de la actividad agraria han originado una intensa transformación de los paisajes característicos de las monta as mediterráneas. Una dinámica marcada por un intenso proceso de incremento de la superficie forestal en detrimento de las zonas dedicadas a la ganadería y a la agricultura. Este proceso, que repercute en aspectos tan variados como la pérdida de biodiversidad y patrimonio cultural o la proliferación de incendios forestales, puede ser cartografiado, cuantificado y caracterizado con una gran exactitud gracias a la cartografía digital, los sistemas de información geográfica y los índices de paisaje. Pero cuál es la percepción y la valoración de estos cambios por parte de los agentes sociales involucrados en la gestión de estos territorios? En este artículo se intenta dar respuesta a esta pregunta en el espacio protegido del Alta Garrotxa (Girona), donde se pone de manifiesto una elevada coincidencia entre las dinámicas del paisaje y la percepción de estas dinámicas por parte de los agentes sociales. En cambio la valoración social de estos cambios y las perspectivas de futuro generan opiniones diversas y a menudo contradictorias que ilustran las dificultades de gestión existentes
Resistência física de bainhas de plantas de arroz supridas com silício e infectadas por Rhizoctonia solani Physical resistance of leaf sheaths of rice plants supplied with silicon and infected by Rhizoctonia solani
Daniel Augusto Schurt,Fabrício ávila Rodrigues,Ricardo Dutra Reis,Wiler Ribas Moreira
Tropical Plant Pathology , 2012, DOI: 10.1590/s1982-56762012000400008
Abstract: Este trabalho objetivou associar a deposi o de silício (Si) nas bainhas de plantas de arroz ao aumento da resistência física à infec o por Rhizoctonia solani. Plantas das cultivares suscetíveis BR-Irga 409 e Labelle foram cultivadas em solu o nutritiva contendo (+Si) ou n o (-Si) Si. A concentra o de Si nas bainhas das plantas supridas com Si e inoculadas com R. solani aumentou significativamente em rela o às plantas n o supridas com Si reduzindo o comprimento relativo da les o às 96 horas após inocula o (hai). Houve diferen a significativa entre os tratamentos -Si e +Si quanto à for a necessária para uma agulha metálica atravessar as bainhas às 48 e 72 hai. A maior resistência física às 24 hai deve-se ao fato de que R. solani estava crescendo sobre o tecido sem destruí-lo, o que p de ser comprovado pela ausência de sintomas. Após esse período, a resistência diminuiu devido ao rápido crescimento de R. solani. Entretanto, nas bainhas de plantas supridas com Si, a for a necessária para a agulha penetrar foi maior às 48 e 72 hai. A resistência das bainhas de plantas supridas com Si à infec o por R. solani pode ser explicada, em parte, pela maior resistência física decorrente da deposi o desse elemento. This study aimed to associate the silicon (Si) deposition on sheaths of rice plants with an increase in physical resistance against infection by Rhizoctonia solani. Plants from the susceptible cultivars BR-Irga 409 and Labelle were grown in nutrient solution containing (+Si) or not (-Si) Si. Si concentration on sheaths of plants supplied with Si and inoculated with R. solani significantly increased compared to plants non-supplied with Si, reducing the relative lesion length at 96 hours after inoculation (hai). There were significant differences between -Si and +Si treatments for the force required of a metal needle to pass through the sheaths at 48 and 72 hai. The greater physical resistance at 24 hai was due to the fact that R. solani was growing on sheath tissue without destroying it, which could be proved by the absence of symptoms. After this period, the resistance decreased due to the rapid R. solani growth. However, on sheaths of plants supplied with Si, the force required for the needle to penetrate was higher at 48 and 72 hai. The sheath resistance of plants supplied with Si to infection by R. solani can be explained partly by the greater physical resistance due to Si deposition.
Prote o local, n o sistêmica, do silicato de potássio reduz os sintomas da ferrugem do cafeeiro Local protection, not systemic, of potassium silicate to decrease coffee leaf rust symptoms
Vivian Carré-Missio,Fabrício ávila Rodrigues,Daniel Augusto Schurt,Wiler Ribas Moreira
Tropical Plant Pathology , 2012, DOI: 10.1590/s1982-56762012000400007
Abstract: No primeiro experimento, plantas de cafeeiro com três pares de folhas foram pulverizadas com silicato de potássio (K2SiO3), epoxiconazole, acibenzolar-S-metil (ASM) e água destilada de duas maneiras: pulveriza o do 3o par de folhas, a partir do ápice, protegendo o 2o par de folhas ou pulveriza o de um par de folhas da lateral esquerda da planta e protegendo o par de folhas da lateral direita. Após 24 h, a face abaxial dos pares de folhas protegidos foi inoculada com Hemileia vastatrix. No segundo experimento, o 3o par de folhas de plantas, a partir do ápice, foi pulverizado com K2SiO3, ASM e água destilada protegendo o 2o par de folhas. Aos 1, 5, 15, 25 e 35 dias após aplica o dos produtos, a face abaxial do 2o (prote o sistêmica) e do 3o par de folhas (prote o local) de oito plantas de cada tratamento foram inoculadas com H. vastatrix. O K2SiO3 pulverizado no 3o par de folhas ou em um par de folhas da lateral esquerda foi ineficiente em aumentar a concentra o de silício e reduzir a intensidade da esporula o (IE), o número total de pústulas (NTP) por folha e a severidade da ferrugem no 2o par de folhas ou no par de folhas da lateral direita, ao contrário do epoxiconazole e do ASM, os quais apresentaram sistemicidade na planta. A pulveriza o do K2SiO3 no 3o par de folhas também n o garantiu, devido a sua natureza n o sistêmica, redu o da IE, do NTP e da severidade da ferrugem comparado com a prote o local. Os resultados desse trabalho apontam para a possibilidade de se utilizar a pulveriza o com silicato de potássio para reduzir a intensidade da ferrugem do cafeeiro preventivamente. In the first experiment, coffee plants with three pairs of leaves were sprayed with potassium silicate (K2SiO3), epoxiconazole, acibenzolar-S-methyl (ASM), and distilled water in two different ways: spraying the 3rd pair of leaves from the apex and protecting the 2nd pair of leaves or spraying the two pair of leaves on the left side of the plant and protecting the pair of leaves on the right side. After 24 h, the abaxial surface of the protected pair of leaves was inoculated with Hemileia vastatrix. In the second experiment, the 3rd pair of leaves from the apex was sprayed with K2SiO3, ASM, and distilled water and the 2nd pair of leaves was protected. At 1, 5, 15, 25, and 35 days after products application, the abaxial surface of 2nd (systemic protection) and the 3rd pair of leaves (local protection) of eight plants per treatment were inoculated with H. vastatrix. The K2SiO3 spray on the 3rd pair of leaves or on the pair of leaves on the left side was ineffective i
Uso de medios alternativos a base de hidrolizado de caseína y extracto de Aspergillus niger y su efecto sobre la expresión genética de una cepa de Escherichia coli
Garboza,Fátima; Frontado,Ronald; Noguera,Nirza; ávila,Horacio; Ojeda,Luis; Ramírez,Ninoska; Triana,Juana; Triana,Francisco;
Revista de la Sociedad Venezolana de Microbiología , 2011,
Abstract: the search for alternative nutritional sources for mass microorganism cultures has been a common practice in the area of industrial microbiology. nevertheless, it not possible to use these substitutes in all cases since the presence or absence of certain nutrients can condition cellular growth, as well as the expression of certain metabolites. in the present investigation several media were formulated based on casein hidrolyzate and aspergillus niger mycelium extract to substitute the components of luria-bertani (lb) medium, for culturing a genetically improved escherichia coli strain. the quality of the media was evaluated by following bacterial growth, comparing the kinetic parameters and analyzing the protein electrophoretic profile and total cell nucleic acids recovered from the cell packages of final cultures. it was found that the medium formulated with 75% casein hidrolyzate and 75% fungus extract favors cell growth and genetic expression in a similar fashion to lb medium. the cell protein profile varies significantly if a smaller proportion is used, indicating a limit in the reduction of nutritive components of the alternative medium
Avalia??o da marcha em ambiente terrestre em indivíduos com síndrome de Down
ávila, Daniele Cristina do Carmo de;Bom, Fernanda Souza Pedro;Juschaks, Luciano Magno;Ribas, Danieli Isabel Romanovitch;
Fisioterapia em Movimento , 2011, DOI: 10.1590/S0103-51502011000400019
Abstract: introduction: patients with down syndrome (ds) present a delayed acquisition of fundamental movement patterns, showing as a basic characteristic a difficulty to form and select motor programs. objective: this study aimed to determine the variables of linear motion on the ground of patients with ds and to compare them with values of healthy individuals obtained in the literature. methods: it is a cross-sectional study with 12 subjects (both gender, 18 years ± 2.8) submitted to an evaluation of variables of linear motion on the ground, through the printing of the footsteps on a brown paper footbridge with 15 meters long and 0.6 in width. results: the analyzed group showed a step size of 41.62 ± 8.39, stride length 83.24 ± 16.78, motion velocity of 0.60 meters per second ± 0.15 and a rate of 89.35 ± 14,33 steps per minute. conclusion: the values obtained for the linear variables (step and stride size, cadence and motion speed) in this study indicate differences with the values found in the literature for healthy individuals, the found values are lower than the reported in the literature.
Componentes epidemiológicos da ferrugem do cafeeiro afetados pela aplica??o foliar de silicato de potássio
Carré-Missio, Vivian;Rodrigues, Fabrício ávila;Schurt, Daniel Augusto;Rezende, Dalilla Carvalho;Moreira, Wiler Ribas;Kornd?rfer, Gaspar Henrique;Zambolim, Laércio;
Tropical Plant Pathology , 2012, DOI: 10.1590/S1982-56762012000100006
Abstract: leaf rust, caused by hemileia vastatrix, is the most important coffee disease. alternative methods of management of this disease that are less damaging to the environment than fungicide applications are urgently needed. this study aimed at evaluating the effect of foliar applications of potassium silicate (ps) solutions at concentrations of 0, 8, 20, 40, and 60 g/l, at phs 5.5 and 10.5, on sporulation intensity of h. vastatrix (si), total number of pustules (tnp) per leaf, and on coffee leaf rust severity. the effect of the applications of ps at the selected rates, of copper oxychloride (7.5 g/l), and of sterile distilled water at ph 5.5, 7.5, and 10.5 on the inhibition of h. vastatrix uredospores germination was also tested and the foliar concentration of silicon (si) and potassium (k) was determined. a quadratic regression model best described the effect of ps applications, at ph 5.5 or 10.5, on si, tnp, and severity. the relationship between si, tnp, or severity and ps applications, at ph 5.5 or 10.5, was linear and negative. si concentration in leaves increased as the concentration of ps solutions utilized (at ph 5.5) increased from 0 to 60 g/l. there was no effect of ps applications, at ph 10.5, on si concentration in leaves. k concentration did not change as the ps rates increased from 0 to 60 g/l, both at phs 5.5 and 10.5. a linear regression model adequately described the relationship of inhibition of uredospores germination versus ps concentrations at the three phs values. copper oxychloride significantly reduced uredospore germination as compared with the ps applications. the results from this study highlight the possibility of using ps spray, in a more alkaline ph, as a treatment for reducing coffee leaf rust intensity.
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