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Search Results: 1 - 10 of 441288 matches for " Mar Mu?oz M "
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Regulation of Translation Initiation under Abiotic Stress Conditions in Plants: Is It a Conserved or Not so Conserved Process among Eukaryotes?
Alfonso Mu oz,M. Mar Castellano
Comparative and Functional Genomics , 2012, DOI: 10.1155/2012/406357
Abstract: For years, the study of gene expression regulation of plants in response to stress conditions has been focused mainly on the analysis of transcriptional changes. However, the knowledge on translational regulation is very scarce in these organisms, despite in plants, as in the rest of the eukaryotes, translational regulation has been proven to play a pivotal role in the response to different stresses. Regulation of protein synthesis under abiotic stress was thought to be a conserved process, since, in general, both the translation factors and the translation process are basically similar in eukaryotes. However, this conservation is not so clear in plants as the knowledge of the mechanisms that control translation is very poor. Indeed, some of the basic regulators of translation initiation, well characterised in other systems, are still to be identified in plants. In this paper we will focus on both the regulation of different initiation factors and the mechanisms that cellular mRNAs use to bypass the translational repression established under abiotic stresses. For this purpose, we will review the knowledge from different eukaryotes but paying special attention to the information that has been recently published in plants.
Regulation of Translation Initiation under Abiotic Stress Conditions in Plants: Is It a Conserved or Not so Conserved Process among Eukaryotes?
Alfonso Muoz,M. Mar Castellano
International Journal of Genomics , 2012, DOI: 10.1155/2012/406357
Abstract: For years, the study of gene expression regulation of plants in response to stress conditions has been focused mainly on the analysis of transcriptional changes. However, the knowledge on translational regulation is very scarce in these organisms, despite in plants, as in the rest of the eukaryotes, translational regulation has been proven to play a pivotal role in the response to different stresses. Regulation of protein synthesis under abiotic stress was thought to be a conserved process, since, in general, both the translation factors and the translation process are basically similar in eukaryotes. However, this conservation is not so clear in plants as the knowledge of the mechanisms that control translation is very poor. Indeed, some of the basic regulators of translation initiation, well characterised in other systems, are still to be identified in plants. In this paper we will focus on both the regulation of different initiation factors and the mechanisms that cellular mRNAs use to bypass the translational repression established under abiotic stresses. For this purpose, we will review the knowledge from different eukaryotes but paying special attention to the information that has been recently published in plants. 1. Introduction One of the main responses of cells to stress conditions involves partial or virtually total cessation of energetically consumptive processes normally vital to homeostasis, including transcription and protein synthesis. Translation consumes a substantial amount of cellular energy and, therefore, it is one of the main targets to be inhibited in response to most, if not all, types of cellular stresses. However, under conditions where global protein synthesis is severely compromised, some proteins are still synthesised as part of the mechanisms of cell survival, as these proteins are able to mitigate the damage caused by the stress and enable cells to tolerate the stressful conditions more effectively [1]. Appearance of abiotic stresses, as environmental conditions, is in many cases sudden. Therefore, a quick response to stress should be established to assure cell survival. In such a context, translational regulation of preexisting mRNAs provides a prompt and alternative way to control gene expression, as compared to other slower cellular processes such as mRNA transcription, processing, and transport to cytoplasm [2]. In animals and yeast, there are many known examples of global translational inhibition and preferential production of key proteins critical for survival under different abiotic insults [3–8]. This scenario
Adherencia e impacto de la dieta sin gluten en ni?os con enfermedad celíaca
BRAVO M,FRANCISCA; MUOZ F,MARíA PAZ;
Revista chilena de pediatría , 2011, DOI: 10.4067/S0370-41062011000300003
Abstract: the treatment of celiac disease (cd) is a strict and permanent gluten-free diet (gfd). factors exist that influence adherence: motivation, information, costs, correct labeling and food availability. objectives: describe adherence and impact of gfd in children with cd. patients and methods: prospective descriptive study, through application of a 28 question survey to children 12-18 y.o. with the disorder, and parents of children 3-18 with the disease. results: median age: 10.5 years, 1.8 years at diagnosis. 62.5% women. adherence to treatment was seen in 42,5% of patients according to parents, 15% according to children > 12 yrs. vs 35% parents of children > 12 y.o. 80% of children state feeling no different on a diet, 70% find the diet hard to follow. 55% have difficulty following the diet, among them, 42,8% are not sure what they can eat, 51.5% state it creates financial distress in the family. about 55% believe it affects family life due to the following: 55% food limitation, 50% food preparation, 75% affect eating out, 35% affect traveling. 50% of parents have fed children a forbidden food, mainly at home (44%). information regarding gfd is obtained at the hospital (85%). there is 32.5% adherence to cd foundations. conclusions: gfd impacts children's lifestyle with difficulty in adherence and management.
Adherencia e impacto de la dieta sin gluten en ni os con enfermedad celíaca Adherence and impact of gluten free diet in children with celiac disease
FRANCISCA BRAVO M,MARíA PAZ MUOZ F
Revista chilena de pediatría , 2011,
Abstract: El tratamiento de la enfermedad celíaca (EC) es la dieta libre de gluten (DLG) estricta y permanentemente. Existen factores que influyen en adherencia: motivación, información, costos, rotulación y disponibilidad de alimentos. Objetivos: Describir adherencia e impacto de DLG en ni os celíacos. Pacientes y Método: Estudio descriptivo y prospectivo con aplicación de encuesta de 28 preguntas a ni os celíacos > 12 a os (12-18 a os) y a padres de pacientes celíacos entre 3 y 18 a os. Resultados: Edad media 10,5 a os y al diagnóstico 1,8 a os, 62,5% mujeres. Adherencia 42,5% según total de padres; 15% según ni os > 12 a os vs 35% padres de ni os > 12 a os. El 80% refiere no sentirse distinto, 70% encuentra DLG difícil de seguir. 55% le molesta seguirla porque no saben que comer (42,8%), siendo la principal dificultad de los padres económica (51,5%). Un 55% cree que influye en la vida familiar: limitación alimentos (55%), preparación especial (50%), comer fuera de casa (75%), viajes (35%). El 50% de padres ha dado alguna vez alimentos prohibidos a sus hijos, principalmente en casa (47%). La información de DLG la obtienen en hospital (85%). Existe 32,5% adherencia a fundaciones celíacas. Conclusiones: La DLG implica impacto en la vida de ni os celíacos, existiendo dificultades en el manejo y regular adherencia a ella. The treatment of Celiac Disease (CD) is a strict and permanent gluten-free diet (GFD). Factors exist that influence adherence: motivation, information, costs, correct labeling and food availability. Objectives: Describe adherence and impact of GFD in children with CD. Patients and Methods: Prospective descriptive study, through application of a 28 question survey to children 12-18 y.o. with the disorder, and parents of children 3-18 with the disease. Results: Median age: 10.5 years, 1.8 years at diagnosis. 62.5% women. Adherence to treatment was seen in 42,5% of patients according to parents, 15% according to children > 12 yrs. vs 35% parents of children > 12 y.o. 80% of children state feeling no different on a diet, 70% find the diet hard to follow. 55% have difficulty following the diet, among them, 42,8% are not sure what they can eat, 51.5% state it creates financial distress in the family. About 55% believe it affects family life due to the following: 55% food limitation, 50% food preparation, 75% affect eating out, 35% affect traveling. 50% of parents have fed children a forbidden food, mainly at home (44%). Information regarding GFD is obtained at the hospital (85%). There is 32.5% adherence to CD foundations. Conclusions: GFD impacts child
Tendencias de las profesiones del área económico-administrativa
Elia Marúm Espinosa,Victor Rosario Muoz
Perfiles educativos , 2001,
Abstract: Los cambios que ha sufrido la realidad nacional a partir de la última década del siglo pasado han generado nuevas circunstancias para el mercado laboral de profesionistas del área económico-administrativa, que exigen un nuevo perfil profesional y modificaciones estructurales y curriculares en las instituciones de educación superior que los forman. En este trabajo se resumen las características humanas y técnicas que debe tener un profesionista considerado competitivo, así como las conceptuaciones de cambio estructural y curricular que se requieren para lograr este perfil, ejemplificando con los casos de la Universidad Veracruzana y la Universidad de Guadalajara. Se concluye con una revisión de las nuevas características de las profesiones más representativas del área, considerando de manera detallada tanto las carreras con mayor matrícula, como las nuevas ofertas profesionales en esta área del conocimiento.
Evaluación de la degradabilidad in situ en bovinos suplementados con cuatro especies arbóreas
María Roa V.,Javier Muoz M.
Revista MVZ Córdoba , 2012,
Abstract: Objetivo. Evaluar degradabilidad in situ en rumen de cuatro especies forrajeras: Acacia Roja (Delonix regia), pízamo (Eritryna glauca), Cratilia (Cratylia argentea) y casco de vaca (Bahuinia variegata), para determinar su calidad nutricional. Materiales y métodos. Cuatro hembras rumino-fistuladas en un dise o de sobrecambio simple, pastoreando en Brachiaria decumbens, suplementadas en la ma ana con tres kg de hojas deshidratadas de las cuatro especies mencionadas, de un a o de establecidas y podadas cada 3 meses. En las pruebas in situ se utilizaron bolsas de nylon, adicionando 5 g de MS de cada arbórea/bolsa, incluyendo braquiaria, en diferentes horas (6, 12, 24, 48 y 72). Se evaluó la degradabilidad de la materia seca (DMS), fibra detergente neutro (DFDN) fibra detergente ácido (DFDA), nitrógeno total (DNT) y nitrógeno adherido a FDN (DNFDN). En el líquido ruminal se midió nitrógeno amoniacal a las 0, 4, 8 y 12 y pH a las 0, 3, 6, 9 y 12 horas. Resultados. La DMS fue mayor (p>0.05) para casco de vaca (53.3%) y acacia roja (56.1%) con relación a pízamo y cratilia. La DMS de braquiaria fue mayor (p>0.05) en 18.6% suplementando con casco de vaca con relación a las otras arbóreas. La DFDN potencial fue menor (p>0.05) para pízamo (7.6%) en comparación con cratilia. La DFDN de braquiaria fue similar en todas las forrajeras. Conclusiones. Algunos componentes de las arbóreas tienen efecto asociativo en la cinética de la tasa de degradación de MS y FDA del pasto, siendo superiores (p>0.05) cuando se suplementó con casco de vaca.
Presentación
Víctor Manuel Rosario Muoz,Elia Marúm Espinosa
Avalia??o: Revista da Avalia??o da Educa??o Superior (Campinas) , 2012, DOI: 10.1590/s1414-40772012000300002
Abstract:
Diffeomorphism-invariant Covariant Hamiltonians of a pseudo-Riemannian Metric and a Linear Connection
J. Muoz Masqué,M. Eugenia Rosado María
Physics , 2011,
Abstract: \noindent Let $M\to N$ (resp.\ $C\to N$) be the fibre bundle of pseudo-Riemannian metrics of a given signature (resp.\ the bundle of linear connections) on an orientable connected manifold $N$. A geometrically defined class of first-order Ehresmann connections on the product fibre bundle $M\times_NC$ is determined such that, for every connection $\gamma $ belonging to this class and every $\mathrm{Diff}N$-invariant Lagrangian density $\Lambda $ on $J^1(M\times_NC)$, the corresponding covariant Hamiltonian $\Lambda ^\gamma $ is also $\mathrm{Diff}N$-invariant. The case of $\mathrm{Diff}N$-invariant second-order Lagrangian densities on $J^2M$ is also studied and the results obtained are then applied to Palatini and Einstein-Hilbert Lagrangians.
Nuevo hallazgo de Nardophyllum genistoides (Phil.) Gray (Asteraceae) en Chile central
Muoz-Schick,Mélica; Morales,Vanezza; Cruzat,María Eugenia; Moreira-Muoz,Andrés;
Gayana. Botánica , 2010, DOI: 10.4067/S0717-66432010000200009
Abstract: nardophyllum genistoides (phil.) gray is recollected after a century and a half, in the same región metropolitana, chile, at a new locality south of the original site. it grows around 1.600 masl, in the río clarillo national reserve, associated to the sclerophyllous forest. the species is very rare, because only one plant was found.
Nuevo hallazgo de Nardophyllum genistoides (Phil.) Gray (Asteraceae) en Chile central New finding of Nardophyllum genistoides (Phil.) Gray (Asteraceae) in Central Chile
Mélica Muoz-Schick,Vanezza Morales,María Eugenia Cruzat,Andrés Moreira-Muoz
Gayana. Botanica , 2010,
Abstract: Nardophyllum genistoides (Phil.) Gray is recollected after a century and a half, in the same Región Metropolitana, Chile, at a new locality south of the original site. It grows around 1.600 masl, in the Río Clarillo National Reserve, associated to the sclerophyllous forest. The species is very rare, because only one plant was found.
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