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Search Results: 1 - 10 of 7870 matches for " Morales-Espinoza "
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Capital social en la cadena aloe, estado Falcón, Venezuela
Pi?a-Zambrano,Henri; Castellanos-Tua,Juan; Morales-Espinoza,Agustín;
Cuadernos de Desarrollo Rural , 2011,
Abstract: social capital is a relatively current notion. it is located at the conceptual level of the social system relationship, being alternatively a resource and a mean to access goods. under this conception, social capital is transformed into a tool in the living strategy of the individuals to grant them contact to other resources, increase their involvement with organizations and to promote action plans directed to improve their social participation levels. following this premise, research was conducted in order to quantify and qualify the existence of the social capital in the aloe's chain in the falcon state, in terms of its nature as an interrelationship promoter among its economical agents that influence its evolution dynamics. the methodology is sustained in the established relationship by the chain agents. the results show that such relationship among individuals related to the aloe's culture is mainly directed by informal institutions developed along time. in the same way, it is highlighted the strong capital reflected in the attitude and proactivity of the members of the chain when the bond oriented to conform a solid base for the connection with the different items related to the aloe's culture is established with the aim of sustaining a scheme of rural development.
Parasitosis intestinal en ni os, en áreas de alta marginación socioeconómica de la región fronteriza de Chiapas, México
Morales-Espinoza Emma Marianela,Sánchez-Pérez Héctor Javier,García-Gil María del Mar,Vargas-Morales Guadalupe
Salud Pública de México , 2003,
Abstract: OBJETIVO: Estimar la prevalencia de parasitosis intestinal en ni os de zonas de alta marginación y su asociación con indicadores demográficos y socioeconómicos de interés. MATERIAL Y MéTODOS: En una muestra de 1478 menores de edad, de entre 1 a 14 a os, provenientes de 32 comunidades de la región fronteriza de Chiapas, México, de marzo a septiembre de 1998, se recolectaron tres muestras de heces fecales, seleccionadas aleatoriamente a partir del grado de marginación (alto y muy alto) del municipio al que pertenecen, y distancia de la unidad de salud más cercana a la comunidad (<1 hora; 1 hora o más). En una de cada cuatro viviendas con ni os menores de 15 a os de edad, seleccionadas aleatoriamente, se obtuvieron tres muestras de heces fecales de éstos. Se efectuaron análisis bivariados con la prueba de ji cuadrada y multivariados con modelos lineales generalizados. RESULTADOS: La prevalencia global de parasitosis fue de 67% (intervalo de confianza IC 95% 64-70%). Sesenta por ciento de los ni os estaban multiparasitados. La prevalencia de Entamoeba histolytica/E dispar fue de 51.2%, de Giardia lamblia, 18.3% y de Ascaris lumbricoides, 14.5%. La mayor prevalencia de E histolytica/E dispar se asoció con la edad y hablar algún idioma indígena; la de Ascaris lumbricoides con el sitio de obtención de agua y la carencia de refrigerador y electricidad. CONCLUSIONES: Es necesario hacer intervenciones locales de salud (calidad del agua, sistemas de desagüe), programas de educación sanitaria (promoción de la lactancia materna y medidas higiénicas) y promoción del habla de idiomas indígenas entre los médicos de la región.
Synthesis of Porphyrin-Dendrimers with a Pyrene in the Periphery and Their Cubic Nonlinear Optical Properties
Eric G. Morales-Espinoza,Irina V. Lijanova,Omar G. Morales-Saavedra,Vícente Torres-Zu?iga,Simon Hernandez-Ortega,Marcos Martínez-García
Molecules , 2011, DOI: 10.3390/molecules16086950
Abstract: Dendrons of pyrene derivatives were attached to a porphyrin core. A marked effect in solution for the dendrimers was observed in the absorption spectra. All the compounds obtained were characterized by 1H-, 13C-NMR, FTIR, UV-vis, MALDI-TOF or FAB+ mass spectrometry and elemental analysis. The cubic nonlinear optical behavior of some the synthesized compounds was tested via Z-Scan measurements in spin-coated film samples.
Intestinal parasites in children, in highly deprived areas in the border region of Chiapas, Mexico
Morales-Espinoza,Emma Marianela; Sánchez-Pérez,Héctor Javier; García-Gil,María del Mar; Vargas-Morales,Guadalupe; Méndez-Sánchez,José Domingo; Pérez-Ramírez,Margarita;
Salud Pública de México , 2003, DOI: 10.1590/S0036-36342003000500008
Abstract: objective: to assess the prevalence of intestinal parasitic infections among children in highly deprived areas, and its possible association with demographic and socioeconomic indicators. material and methods: from march to september 1998 in a convenience sample of 32 communities of the border region of chiapas, mexico, selected at random based on the level of poverty and distance from the community to the nearest health care unit (<1 hour; 1 hour or more), one of every four households with children under 15 years of age was randomly selected to provide three stool samples from their children (n 1478). bivariate and multivariate (generalized linear models for correlated binary data) analysis were performed. results: the global prevalence of intestinal parasitosis was 67% (95% confidence interval [ci] 64-70%). sixty percent had multiple parasites. the prevalence of entamoeba histolytica/e dispar was 51.2%, that of giardia lamblia 18.3%, and that of ascaris lumbricoides 14.5%. multivariate analysis showed that age and speaking an indigenous language were significantly associated with the presence of e histolytica/ e dispar and giardia lamblia. source of water and lacking a refrigerator and electricity were associated with the presence of ascaris lumbricoides. conclusions: measures should be taken to improve water quality, sewage disposal, and domestic hygiene. furthermore, health programs should be established to promote breast-feeding, and education policies aimed at reinforcing the use of indigenous languages by physicians in the health services.
Dendrimers Containing Ferrocene and Porphyrin Moieties: Synthesis and Cubic Non-Linear Optical Behavior
Eric G. Morales-Espinoza,Karla E. Sanchez-Montes,Elena Klimova,Tatiana Klimova,Irina V. Lijanova,José L. Maldonado,Gabriel Ramos-Ortíz,Simón Hernández-Ortega,Marcos Martínez-García
Molecules , 2010, DOI: 10.3390/molecules15042564
Abstract: Dendrons with ferrocenyl ended groups joined by styryl moieties were attached to a porphyrin core. All the dendrons used for dendrimer synthesis showed trans configuration. The chemical structure of the first generation dendron was confirmed by X-ray crystallographic studies. The structure of the synthesized dendrimers was confirmed by 1H- and 13C-NMR, electrospray mass spectrometry and elemental analysis. Cubic non-linear optical behavior of the ferrocene and porphyrin-containing dendrimers was studied in solid thin films by THG Maker-Fringe technique at 1,260 nm.
Chronic Deep Brain Stimulation of the Hypothalamic Nucleus in Wistar Rats Alters Circulatory Levels of Corticosterone and Proinflammatory Cytokines
Juan Manuel Calleja-Castillo,Dora Luz De La Cruz-Aguilera,Joaquín Manjarrez,Marco Antonio Velasco-Velázquez,Gabriel Morales-Espinoza,Julia Moreno-Aguilar,Maria Eugenia Hernández,Lucinda Aguirre-Cruz,Lenin Pavón
Journal of Immunology Research , 2013, DOI: 10.1155/2013/698634
Abstract: Deep brain stimulation (DBS) is a therapeutic option for several diseases, but its effects on HPA axis activity and systemic inflammation are unknown. This study aimed to detect circulatory variations of corticosterone and cytokines levels in Wistar rats, after 21 days of DBS-at the ventrolateral part of the ventromedial hypothalamic nucleus (VMHvl), unilateral cervical vagotomy (UCVgX), or UCVgX plus DBS. We included the respective control (C) and sham (S) groups ( rats per group). DBS treated rats had higher levels of TNF- (120%; ) and IFN- (305%; ) but lower corticosterone concentration (48%; ) than C and S. UCVgX animals showed increased corticosterone levels (154%; ) versus C and S. UCVgX plus DBS increased IL-1 (402%; ), IL-6 (160%; ), and corsticosterone (178%; versus 48%; ) compared with the C and S groups. Chronic DBS at VMHvl induced a systemic inflammatory response accompanied by a decrease of HPA axis function. UCVgX rats experienced HPA axis hyperactivity as result of vagus nerve injury; however, DBS was unable to block the HPA axis hyperactivity induced by unilateral cervical vagotomy. Further studies are necessary to explore these findings and their clinical implication. 1. Introduction The clinical use of deep brain stimulation (DBS) has increased in recent years [1]. This treatment has become a therapeutic option for pathologies that are associated with chronic pain and movement disorders [2] as well as for refractory depression [3] or epilepsy [4]. Such patients can be treated with direct electrical stimulation at the vagus nerve [5, 6] or at deep nuclei of the hypothalamus [4, 7–9]. The use of DBS in humans entails the implantation of a generator of electric current (commonly under the collarbone) and bilateral electrodes that transmit a continuous current to precise stereotaxic coordinates into the brain [10]. Although DBS was initially considered to mimic a lesion, the mechanism by which this therapy exerts its effects in vivo is complex and incompletely understood [11]. The electric stimulation of nerves triggers depolarization of the membrane in the associated neurons [12]. Accordingly, DBS devices induce axonal activation and neuronal inhibition in animal models [2, 13, 14]. Theoretically, these effects evoke activity in areas that received axonal projections that are adjacent to the stimulating electrode [15, 16]. The reported changes on neurotransmitters levels at anatomical area in which DBS is applied [17, 18] support this concept. The hypothalamic nuclei are regions of interest to assess the interaction that exists between
Estrategias empresariales en la era global: El caso del complejo sectorial venezolano de grasas y aceites
Morales Espinoza,Agustín;
Agroalimentaria , 2001,
Abstract: in order to study the current restructuring processes in both venezuelan agri-food industry and venezuelan oils and fats industry, the first part of this work refers to tendencies that stand out within the international context as a consequence of the opening and integration economic process. in the second part, using the analytic axes made up of cargill, unilever, nestlé, mavesa and polar industries, the restructuring business process which has occurred in the comestible fat and oil branches of the industries is analyzed. the result of the analysis indicates that since the economic opening and integration were adopted by the venezuelan government, the process of business restructuring has intensified and, consequently, the corresponding index of concentration of these food industries has intensified. in the third part, the implications of this phenomena were analyzed on the complex of fat and oils sector, in particular in the agricultural sector, imports, consumption and also, food security.
Una interpretación del fenómeno Mercal desde la perspectiva teórica de la economía neoinstitucional
Morales Espinoza,Agustín;
Agroalimentaria , 2007,
Abstract: this work has been carried out to analyze the transformation which is occurring in the venezuela urban distribution system as a consequence of the conception and development of the public enterprise, called mercal. in order to carry out this objective, it was first necessary to present the theoretical-conceptual framework that oriented its development. secondly, the context within which this state business came about is discussed. then, the transformations that were produced in the referred to system were analyzed and at the same time, the implications of the presence of mercal for the local economic agents in this system were determined. finally, an interpretation of the mercal ?phenomena? is proposed within the previously established theoretical framework.
Reconfiguración del sector agroalimentario venezolano en el contexto de la globalización
Morales Espinoza,Agustín;
Revista Venezolana de Economía y Ciencias Sociales , 2005,
Abstract: the thesis proposed in this article is that the paradigms and approaches hitherto used to analyze the configuration and functioning of the venezuelan agro-food sector (vas) are no longer altogether satisfactory. the transformations leading to a notable concentration and internationalization of the firms involved in the distribution of food have undermined the foundations of existing interpretations. the author criticizes current interpretations and proposes an alternative theoretical and methodological analysis that permits a more appropriate interpretation of the recent transformations that have occurred in the vas.
Economía neoinstitucional, coordinación vertical y formación de precios: estudio de un caso relacionado con la carne de pollo
Castillo López,Ricardo; Morales Espinoza,Agustín;
Agroalimentaria , 2001,
Abstract: the objective of the present work is to interpret a concrete case of establishing prices at the poultry producer level. the first part of this work analyzes how contracting has become the governing way of coordinating the private sector, contributing peculiarities to the process of price formation, particularly those which cause neoclassical economic theory to loose its explanation capacity. the neoinstitutional economy point of view was reviewed in the second stage as an alternative perspective for analysis of the mentioned process. during this stage, the theoretical elements of neoinstitutional economy were reviewed and the agents of the organization of poultry producers were interpreted under this point of view. lastly, the process of price formation in the poultry industry as a concrete case is interpreted. the results point out that price formation for poultry is carried out using a formula whose particular characteristics permit lowering of transaction costs, of the producers as well as the balanced food industries. through this mechanism of price formulation, the greater part of the risks associated with this productive activity is shared between these two economic agents.
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