Mostrando recursos 1 - 20 de 392.192

  1. El diseño de las instalaciones de pollos de carne y su influencia en las condiciones de confort de los animales

    Guerra Galdo, E.; Calvet Sanz, Salvador; López, A.; Estellés Barber, Fernando
    Broiler chicken performance is highly affected by environmental conditions inside the barn. The main parameters that must be considered in terms of thermic confort are temperature, relative humidity and air velocity. This article reviews the effects of these parameters and their interactions on broiler production and describes the state-of-knowledge of Computational Fluid Dynamics (CFD) used in the design of broiler houses, in order to establish priority research areas in this scope. The design and operation of boriler farms must ensure optimal conditions to avoid heat stress and allow the animals to express their genetic potential. It is well known that the design and management of broiler...

  2. Cutis laxa autosómica recesiva Descripción fenotípica de un caso y revisión de la literatura

    Lacruz de Ortega, María Angelina; Da Silva, Gloria; Guerrero, Diana; Quintero, Edimar; Ordoñez, Yuri; Cammarata Scalisi, Francisco R.
    Cutis laxa is a rare skin disorder, characterized by redundant, inelastic and with an appearance of premature aging. It can be associated with the alteration of other organs involved in their prognosis. It can be inherited or acquired form, local or generalized. It has an estimated incidence of 1 in 1,000,000 births. Genetic studies have discovered a gene network growing required for biogenesis of the elastic fiber in the extracellular matrix and its involvement in the homeostatic maintenance of this integral component of the dermal connective tissue may be involved in the pathophysiology of this entity. We present a case...

  3. Genetic Algorithm for Restricted Maximum k-Satisfiability in the Hopfield Network

    Shareduwan Bin Mohd Kasihmuddin, Mohd; Asyraf Bin Mansor, Mohd; Sathasivam, Saratha
    The restricted Maximum k-Satisfiability MAX- kSAT is an enhanced Boolean satisfiability counterpart that has attracted numerous amount of research. Genetic algorithm has been the prominent optimization heuristic algorithm to solve constraint optimization problem. The core motivation of this paper is to introduce Hopfield network incorporated with genetic algorithm in solving MAX-kSAT problem. Genetic algorithm will be integrated with Hopfield network as a single network. The proposed method will be compared with the conventional Hopfield network. The results demonstrate that Hopfield network with genetic algorithm outperforms conventional Hopfield networks. Furthermore, the outcome had provided a solid evidence of the robustness of...

  4. Feature Selection for Image Retrieval based on Genetic Algorithm

    Kushwaha, Preeti; Ranade, Rashmi
    This paper describes the development and implementation of feature selection for content based image retrieval. We are working on CBIR system with new efficient technique. In this system, we use multi feature extraction such as colour, texture and shape. The three techniques are used for feature extraction such as colour moment, gray level co- occurrence matrix and edge histogram descriptor. To reduce curse of dimensionality and find best optimal features from feature set using feature selection based on genetic algorithm. These features are divided into similar image classes using clustering for fast retrieval and improve the execution time. Clustering technique...

  5. Redacciones múltiples en el teatro unamuniano: el caso de El Otro

    Giorgi, Giulia
    El presente artículo examina la compleja historia redaccional y los principales problemas ecdóticos que plantea una de las piezas unamunianas más conocidas y de la que se conservan múltiples redacciones: El Otro (1932). Después de esclarecer las diferentes etapas de elaboración del drama unamuniano, a través del análisis de los manuscritos Ms1, Ms2 y Ms3 y de las tres copias mecanografiadas (C1, C2 y C3), se ejemplificará el modelo empleado en la edición del texto que estamos preparando. Dicho modelo prevé un aparato genético principal a pie de página y un apéndice que reúne los numerosos fragmentos de las primeras...

  6. Identificação molecular da comunidade de leveduras associadas a macrófitas aquáticas em uma região de marisma da Lagoa dos Patos (RS)

    Gomes, Fernanda Fraga
    Estima-se que somente 20% das espécies de fungos no mundo são atualmente conhecidas e que as leveduras são os micro-organismos decompositores menos estudados na literatura. Este padrão é mantido no estuário da Lagoa dos Patos (Rio Grande – RS, Brasil) e região costeira adjacente. Neste sentido, nós objetivamos realizar o levantamento das espécies de leveduras e fungos leveduriformes associados às macrófitas aquáticas Spartina alterniflora Loisel, Spartina densiflora Brongn. e Bolboschoenus maritimus (L.) Palla na Ilha da Pólvora, uma região de marisma da Lagoa dos Patos. Para atingir esse objetivo, nós utilizamos amostras de fungos in natura que já haviam sido...

  7. Constitutive activation of casein kinase 2 in glioblastomas: Absence of class restriction and broad therapeutic potential.

    Dubois, Nadege; Willems, Marie; Nguyen-Khac, Minh-Tuan; Kroonen, Jerome; Goffart, Nicolas; Deprez, Manuel; Bours, Vincent; Robe, Pierre
    Casein kinase II contributes to the growth and survival of malignant gliomas and attracts increasing attention as a therapeutic target in these tumors. Several reports have suggested that this strategy might be most relevant for specific subgroups of patients, namely Verhaak's classical and TP53 wild-type tumors. Using kinase assays and microarray genetic profiling in a series of 27 proprietary fresh frozen surgical glioma samples, we showed that constitutive CK2 kinase activation is not restricted to tumors that present increased copy numbers or mRNA expression of its catalytic or regulatory subunits, and can result from a functional activation by various cytokines...

  8. Origen, dispersión y diversidad del chirimoyo (Annona cherimola Mill.) en el continente americano

    Larrañaga González, Nerea
    En este trabajo se ha profundizado en las razones que pueden explicar la distribución actual de la diversidad genética del chirimoyo (Annona cherimola Mill.), una especie frutal adaptada a climas subtropicales, con claras implicaciones para su uso y conservación. Gracias a un estudio de código de barras, se pudo comprobar el poder de discriminación del gen cloroplastídico maturasa K (matK) entre las especies con mayor importancia agronómica del género. Además, sobre los polimorfismos de nucleótido único (SNPs) interespecíficos, se diseñaron marcadores que permitieron la identificación mediante presencia o ausencia de bandas en geles de electroforesis de dichas especies tras PCR....

  9. Mining plant genomic and genetic data using the GnpIS information system

    Adam-Blondon, Anne-Francoise; Alaux, Michael; Durand, Sophie; Letellier, Thomas; Merceron, Guillaume; Mohellibi, Nacer; Pommier, Cyril; Steinbach, Delphine; ALFAMA-DEPAUW, Françoise; Amselem, Joëlle; Charruaud, Dorothée; Choisne, Nathalie; Flores, Raphaël-Gauthier; GUERCHE, Claire; Jamilloux, Véronique; Kimmel, Erik; Lapalu, Nicolas; LOAEC, Mikaël; Michotey, Célia; Quesneville, Hadi
    GnpIS is an information system designed to help scientists working on plants and fungi to decipher the molecular and genetic architecture of trait variations by facilitating the navigation through genetic, genomic, and phenotypic information. The purpose of the present chapter is to illustrate how users can (1) explore datasets from phenotyping experiments in order to build new datasets for studying genotype × environment interactions in traits, (2) browse into the results of other genetic analysis data such as GWAS to generate or check working hypothesis about candidate genes or to identify important alleles and germplasms for breeding programs, and (3)...

  10. Sleep characteristics modify the association between genetic predisposition to obesity and anthropometric measurements in 119,679 UK Biobank participants

    Celis-Morales, Carlos; Lyall, Donald M.; Guo, Yibing; Steel, Lewis; Llamas, Daniel; Ward, Joey; Mackay, Daniel F.; Biello, Stephany M.; Bailey, Mark E.S.; Pell, Jill P.; Gill, Jason M.R.
    Background - Obesity is a multifactorial condition influenced by genetics, lifestyle and environment. Objective - To investigate whether the association between a validated genetic profile risk score for obesity (GPRS-obesity) with body mass index (BMI) and waist circumference (WC) was modified by sleep characteristics. Design - This study included cross-sectional data from 119,859 white European adults, aged 37-73 years, participating on the UK Biobank. Interactions between GPRS-obesity, and sleep characteristics (sleep duration, chronotype, day napping, and shift work) in their effects on BMI and WC were investigated. Results - The GPRS-obesity was associated with BMI (β:0.57 kg.m-2 per standard deviation...

  11. Relação entre Parâmetros de Adiposidade e Proteína C Reativa em Mulheres com Câncer de Mama

    Barbosa, Andressa Carneiro dos Santos; Costa Fontinele, Renata Rodrigues; Oliveira do Nascimento Holanda, Aldenora; Soares de Oliveira, Ana Raquel; Araújo Sampaio, Fabiane; Morais, Jennifer Beatriz Silva; Soares Severo, Juliana; Borges da Silva, B.; Marreiro, Dilina do Nascimento; Mota Martins, Luana
    Introduction: Breast cancer is a multifactorial disease involving imbalance between genetic, dietary and hormonal factors. Research has shown that overweight associated with various metabolic disorders, such as chronic low-grade inflammation, which seems to be involved in development and progression of breast cancer. The objective was to evaluate the relationship between adiposity parameters and serum concentrations of C-reactive protein in women with breast cancer. Methods: Cross-sectional study with cases and controls, involving 68 women, aged between 20 and 59 years, divided into two groups: case (breast cancer, n = 34) and control (without breast cancer, n = 34). Body mass index...

  12. Drosophila melanogaster, an Emerging Animal Model for the Study of Human Cardiac Diseases

    Santalla, Manuela; Portiansky, Enrique Leo; Ferrero, Paola Viviana
    Background: The need to work with model organisms in medical research has revealed the usefulness of the fruit fly Drosophila melanogaster, considering its advantages to perform classic genetic studies and modern techniques of genome edition. Several human genes are similar to those of the fruit fly. We have developed for the first time in the country a cardiovascular line of research to study the genetics of aging, addictions and chronic consumption of substances in humans like caffeine. Objective: The aim of this study was to provide experimental evidence that validates Drosophila melanogaster as a model to study human cardiomyopathies related...

  13. Dispersal of zooplankton dormant propagules by wind and rain in two aquatic systems

    Moreno, Emilio; Pérez Martínez, Carmen; Conde Porcuna, José María
    Zooplankton dispersal may regulate population dynamics and the structure of aquatic communities. Zooplankton and other aquatic invertebrates, such as freshwater bryozoans, are potentially dispersed overland by abiotic vectors (e.g., wind, rain and water flow) or by organisms (e.g., waterfowl and insects), and although these dispersal vectors have been widely studied, the importance of dispersal by wind remains controversial. In addition, little information is available on passive deposition rates and the differentiation between dry deposition (sedimentation from the air) and wet deposition (from rainfall). In the present study, we quantified zooplankton propagule dispersal by passive deposition from the air and rainfall...

  14. A Solution to the N-Queens Problem Using Biogeography-Based Optimization

    Habiboghli, Ali; Jalali, Tayebeh
    Biogeography-based Optimization (BBO) is a global optimization algorithm based on population, governed by mathematics of biogeography, and dealing with geographical distribution of biological organisms. The BBO algorithm was used in the present study to provide a solution for the N-queens problem. The performance of the proposed algorithm has been evaluated in terms of the quality of the obtained results, cost function, and execution time. Furthermore, the results of this algorithm were compared against those of genetic and particle swarm algorithms.

  15. Salvador Armendares Sagrera: exiliado español de la segunda generación y pionero de la genética humana en México

    Villanueva Lozano, Marcia
    This paper gives an analysis of Dr. Salvador Armendares' exile and professional career, with the aim of exploring the relation between the intellectual contributions of the second generation of Spanish refugees in Mexico and the origins of medical genetics in that country. The thesis is that the emigration of European refugees due to political issues, where eugenic values were exalted, paradoxically facilitated the establishment of medical genetics in Mexico. Interpretation of cultural, political, and social factors contributes to the analysis, avoiding Eurocentric and expansionist narratives. (Gac Med Mex. 2014;150:352-61) Corresponding autor: Marcia Villanueva Lozano, marciavl@hotmail.com

  16. Cata de dulces y grasas en pacientes con anorexia nerviosa: el papel de la distorsión cognitiva fusión pensamiento-forma

    Monje Moreno, Jose Manuel; Alvarez Amor, Leticia; Ruiz Prieto, Inmaculada; Bolaños Ríos, Patricia; Jáuregui Lobera, Ignacio
    Introduction: It has been found that the olfactorygustatory function is altered in patients with eating disorders, with an impairment affecting the perception of olfactory and gustatory stimuli. Objective: The aim was to explore the subjective reactivity after the exposure and tasting of foods with different gradient of sweetness and different fats textures. In addition, changes in the thought-shape fusion (TSF) cognitive distortion were assessed after tasting those different presentations as well as the correlations between the initial scores on TSF-Questionnaire (TSF-Q) and the different responses after that tasting. Method: A total of 15 healthy controls and 23 outpatients with anorexia...

  17. Factores ambientales y genéticos asociados al consumo de psicofármacos en mujeres adultas. Un estudio de gemelos de base poblacional

    Rosagro-Escámez, Francisco; González Javier, Francisca; Ordoñana Martín, Juan Ramón
    Introducción: Nuestro objetivo es determinar la prevalencia de consumo de psicofármacos, en una muestra de mujeres adultas, relacionándolo con variables sociodemográficas y con la presencia de trastornos mentales. Adicionalmente se pretende analizar la contribución relativa de factores ambientales y genéticos a dicho consumo. Método: La muestra consiste en una cohorte, de base poblacional, formada por 437 parejas de gemelas nacidas entre 1940 y 1966. La información se recoge a través de entrevista individual que incluye situación laboral, nivel de estudios, situación de pareja, menopausia, presencia de trastorno mental y consumo de psicofármacos. Se utilizan modelos de regresión logística y se aplica el diseño clásico de...

  18. Procesos psicológicos en la somatización: la emoción como proceso

    Sánchez García, Manuel
    The term somatization has generated confusion since it was originally formulated. This conceptual difficulty leads to limitations in the development of diagnostic processes, in advancing the theoretical knowledge, and the establishment of a significantly effective treatment. Given the various multi-causal factors such as enviromental, genetic, biological and psychosocial, the emotional processes or cognitive-emotional processes could provide an emotional-integrative factor that has been little studied. This paper reviews the latest research on the processes that integrate cognition and emotion associated with somatization, using a search for articles in English and Spanish on MEDLINE and Dialnet from 2002 to 2012, with the...

  19. Necesidades proteicas de los deportistas y pautas diétetico-nutricionales para la ganancia de masa muscular

    Urdampilleta Otegui, Aritz; Vicente Salar, Néstor; Martínez Sanz, José Miguel
    One of the most important effects of strength training is muscular hypertrophy. Athletes should optimize their nutritional management in order to compensate their own genetic limitations. The aim of this review is to analyze the scientific evidence concerning protein intake as a tool to achieve muscle hypertrophy. Depending on the expenditure and energy intake of athlete, a daily protein ranging between 10�15% of total dietary intake is needed. However in sports diets, it is preferable to estimate the amount of protein needed per kilogram of body weight in each individual. In this regard athletes should ingest an amount between 1.2...

  20. La violencia simbólica: como reproducción biopolítica del poder

    Peña Collazos, Wilmar
    La violencia simbólica es una apuesta conceptual muy fuerte en la teoría sociológica de Pierre Bourdieu. Ella está en todas partes, pero de manera especial se reproduce, invisible e inexorablemente, en los sistemas de enseñanza. Este problema no es exclusivamente académico, es ante todo político, ético y estético; la violencia simbólica se ejerce en el Estado, se encarna a la vez en la objetividad bajo formas de estructuras y de mecanismos específicos. Hay una gama muy amplia de aspectos o de formas como se puede ejercer tal violencia simbólica y cada campo es un lugar de su ejercicio. Los sistemas...

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