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Search Results: 1 - 10 of 615650 matches for " María C; Rodríguez "
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Sistemas productivos y organización del trabajo: Una visión desde Latinoamérica
Rodríguez P,María C; Mendoza A,Hermelinda;
Gaceta Laboral , 2007,
Abstract: this dissertation centers on the evolution of productive systems and the perspective for addressing them. a documentary investigation was designed with a hermeneutic focus that made it possible to explore different concepts about the nature of human work and sketch diverse forms of labor organization from taylor-fordism to the japanese model. results indicate that the productive systems prevailing at different times were established as a response to paradigmatic conceptions oriented toward improving organizational productivity within the framework of a capitalist development model; the discussion then centers on the changes occurred in labor organization and the adoption of productive paradigms in latin america. conclusions indicate that the dynamics of applying the aforementioned productive systems in this part of the american continent have been asymmetric. the need is stated for helping a new paradigm to emerge that is able to reconcile the precedents and promote human work in its correct dimension, both objective and subjective, where the costs implied in the search for greater productivity are justly paid by the involved actors and where the primacy of the human being over the production process is emphasized. to achieve this, it is necessary to once again take up the concept of man as the subject of labor and consequently overcome the antinomy between labor and capital by structuring organization on the substantial, effective priority of labor, the subjectivity of human labor and its efficient participation in the entire production process.
Sistemas productivos y organización del trabajo: Una visión desde Latinoamérica
María C Rodríguez P,Hermelinda Mendoza A
Gaceta Laboral , 2007,
Abstract: La disertación se centra en la evolución de los sistemas productivos y la perspectiva de abordaje de los mismos. Se dise o una investigación documental con enfoque hermenéutico que permite transitar por diferentes concepciones de la naturaleza del trabajo humano y bosquejar las formas de organización del trabajo desde el Taylor-fordismo, hasta el modelo japonés. Los resultados obtenidos conducen a establecer los sistemas productivos imperantes en distintas épocas como respuesta a concepciones paradigmáticas orientadas a mejorar la productividad organizacional, en el marco del modelo de desarrollo capitalista, para luego centrar la discusión en los cambios ocurridos en la organización del trabajo y la adopción de los paradigmas productivos en América Latina. Las conclusiones a las que se llega sostienen que la dinámica de su aplicación en esta parte del continente americano ha sido asimétrica. Se plantea la necesidad de hacer emerger un nuevo paradigma capaz de reconciliar los precedentes e impulsar el trabajo humano en su justa dimensión, tanto objetiva como subjetiva, donde los costos que implica la búsqueda de mayor productividad sean justamente pagados por los actores involucrados; donde se ponga de relieve la primacía del ser humano sobre el proceso de producción, para lo cual se considera necesario retomar la concepción del hombre como sujeto del trabajo y superar, en consecuencia, la antinomia entre trabajo y capital al estructurarse sobre la sustancial y efectiva prioridad del trabajo, la subjetividad del trabajo humano y de su participación eficiente en todo el proceso de producción. This dissertation centers on the evolution of productive systems and the perspective for addressing them. A documentary investigation was designed with a hermeneutic focus that made it possible to explore different concepts about the nature of human work and sketch diverse forms of labor organization from Taylor-Fordism to the Japanese model. Results indicate that the productive systems prevailing at different times were established as a response to paradigmatic conceptions oriented toward improving organizational productivity within the framework of a capitalist development model; the discussion then centers on the changes occurred in labor organization and the adoption of productive paradigms in Latin America. Conclusions indicate that the dynamics of applying the aforementioned productive systems in this part of the American continent have been asymmetric. The need is stated for helping a new paradigm to emerge that is able to reconcile the precedents and promote
Evaluación microbiológica de alimentos listos para consumo procesados por peque?as industrias costarricenses
Rodríguez-Cavallini,Evelyn; Rodríguez,César; Gamboa,María del Mar; Arias,María Laura;
Archivos Latinoamericanos de Nutrición , 2010,
Abstract: ready-to-eat (rte) foods are processed foodstuffs which have gained popularity in recent times because they can be ingested without further thermic treatments. in this work, the microbiological quality and safety of 90 samples of rte foods manufactured by small costa rican industries was determined to evaluate whether they represent a public health risk. twenty-six samples of pickled vegetables, 18 dips, 18 salads, and 12 sweet treats were studied. each sample was analyzed with regard to its ph, the presence of culturable microbiological quality indicators and recognized foodborne pathogens (salmonella, listeria monocytogenes, clostridium perfringens, c. botulinum, and bacillus cereus) selected genes encoding toxins of c. botulinum and c. perfringens were screened by pcr. thirty-seven percent of the samples had a level of acidity that could allow the growth and proliferation of bacterial pathogens (ph >4.5). the shelf-life indicators were acceptable but only if the rte foods are kept at adequate conditions of temperature and humidity. sixty-four percent of the rte foods had total coliforms values that evidence inadequate hygiene practices during its elaboration (mpn/g >1000). this result was confirmed by the finding of fecal coliforms in 56 % of the samples, which, by the way, are inacceptable for human consumption. all cultures for pathogens were negative, except for 4 samples that contained b. cereus. toxins of c. botulinum were not detected and one single sample was positive for the pcr for c. perfringens. the elevated degree of fecal contamination detected in the rte could be prevented by means of good manufacturing practices, better hygiene measures and a deeper attention to critical control points.
Orbitopatía tiroidea Thyroid orbitopathy
Juana Elvira Maciques Rodríguez,María Cáceres Toledo
Revista Cubana de Endocrinología , 2012,
Abstract: La orbitopatía tiroidea, también llamada orbitopatía de Graves, es una enfermedad inflamatoria, autoinmune y autolimitada que afecta los tejidos orbitarios y periorbitarios, es más frecuente en la mujer, y se asocia a estados de hipertiroidismo, aunque puede estar presente en pacientes hipotiroideos y eutiroideos, agravada por el tabaquismo y los estados de estrés. Se caracteriza, fundamentalmente, por retracción palpebral y exoftalmo, aunque en ocasiones puede evolucionar a formas graves con compromiso importante de la visión por neuropatía óptica compresiva o pérdida de la integridad del globo ocular. Su tratamiento va desde la simple protección del globo ocular en las formas leves, al uso de glucocorticoides u otros inmunosupresores, hasta la cirugía de descompresión orbitaria en los casos más graves, que son cada día menos cruentas y con resultados más esperanzadores. Esta revisión se realizó con el objetivo de unificar y actualizar los conocimientos sobre esta entidad, y proporcionar una información práctica para el diagnostico precoz y el tratamiento adecuado de nuestros pacientes. Thyroid orbitopathy, also known as Graves' orbitopathy, is an inflammatory, autoimmune, and self-limiting disease that affects orbital and periorbital tissues. It is more frequent in women and linked to hyperthyroidism condition, although it may occur in hypothyroid and euthyroid patients, worsened by smoking and stress. It is mainly characterized by palpebral retraction and exophtalmos, but it may sometimes evolve into severe forms with significant impact on the vision due to compressive optic neuropathy or the loss of the eyeball integrity. The treatment ranges from simple protection of the eyeball in the milder forms, the use of glycocorticoids or other immunosuppressive drugs to the orbital decompression surgery in the most severe cases, which are increasingly less painful and more hopeful. This review was aimed at standardizing and updating the knowledge on this disease and at providing practical information for the early diagnosis and the adequate treatment of our patients.
ADMINISTRACIóN DE LA PRODUCCIóN
Diana María Cárdenas Aguirre,Ana Urquiaga Rodríguez
Ingeniería Industrial , 2004,
Abstract: Este artículo presenta los resultados de una investigación descriptiva realizada durante el a o 2003, al 57 % de las empresas de más de diez personas ocupadas en la agrupación 381 de la ciudad de Manizales. El objetivo de dicha investigación es establecer algunas de las principales características de la administración de la producción y los inventarios en estas empresas, siguiendo el enfoque jerárquico de la planificación, programación y control de la producción.
Estado actual y perspectiva de las pruebas relacionadas con el estudio de la función tiroidea
Alavez Martín,Ernesto; Rodríguez González,Julio C.; Marrero Rodríguez,María T.;
Revista Cubana de Endocrinolog?-a , 2003,
Abstract: the thyroid diseases may be diagnosed in most of cases by the clinics. however, there are circumstances that required thyroid function tests to correctly assess the patient in initial stages of thyroid dysfunction and give an adequate treatment on an individual basis and the follow-up of the disease. this review makes reference to the tests used to assess the condition of the thyroid function and mentions their advantages, limitations and present trends. the determination of tsh by second and third generation procedures allow setting up diagnoses of primary hyperthyroidism and hypothyroidism, even in the subclinical forms of both entities since or hypersecretion or inhibition are respectively exposed, and they also allow prescribing the right dose of 1-levothyroxine and orienting towards a hypophyseal cause of thyroid dysfunction. t4 determination is of great value for finding out the intensity of thyroid dysfunction and furthermore assessing the effectiveness of the treatment in the first weeks. t3 determination is mainly indicated when the so-called t3-caused hyperthyroidism is suspected. the determination of total t4 and t3 gives rise to a wrong interpretation regarding the conditions that change the thyroxine-transporting globulin (tbg). the present trend is the use of tsh as an initial test for diagnosing the thyroid dysfunction, which should be indicated taking the clinic into account, and if necessary, it should be associated with the determination of free t4 or free t3.
Estado actual y perspectiva de las pruebas relacionadas con el estudio de la función tiroidea Present state and prospects of tests related to the thyroid function study
Ernesto Alavez Martín,Julio C. Rodríguez González,María T. Marrero Rodríguez
Revista Cubana de Endocrinología , 2003,
Abstract: Las enfermedades tiroideas pueden ser diagnosticadas, en la mayoría de los casos, por la clínica. Sin embargo, existen situaciones que requieren de las pruebas de función tiroidea con el fin de valorar correctamente al paciente en las etapas iniciales de la disfunción de esta glàndula, con el fin de establecer el tratamiento adecuado de forma individual y el seguimiento de la evolución de la enfermedad. En esta revisión hacemos referencia a las pruebas empleadas para valorar el estado de la función tiroidea y se se alan sus ventajas, limitaciones y tendencias actuales. La determinación de TSH por procederes de segunda y tercera generaciones permite establecer el diagnóstico del hipertiroidismo e hipotiroidismo primarios, aún en las formas subclínicas de ambos, al mostrar inhibición o hipersecreción, respectivamente, así como la dosis adecuada de l-levotiroxina y orientar a una causa hipofisaria de esta disfunción. La determinación de T4 es de gran valor para conocer la intensidad de la disfunción tiroidea y para valorar la eficacia del tratamiento en las primeras semanas de iniciado. La determinación de T3 tiene su principal indicación ante la sospecha de la presencia del llamado hipertiroidismo por T3. La determinación de T4 y T3 totales da lugar a una interpretación incorrecta en cuanto a las situaciones que modifican la globulina transportadora de tiroxina (TBG). La tendencia actual es al empleo de TSHs como prueba inicial para el diagnóstico de la disfunción tiroidea, la cual se debe indicar teniendo siempre en cuenta la clínica y, de ser necesario, asociarla a la determinación de T4 o T3 libres. The thyroid diseases may be diagnosed in most of cases by the clinics. However, there are circumstances that required thyroid function tests to correctly assess the patient in initial stages of thyroid dysfunction and give an adequate treatment on an individual basis and the follow-up of the disease. This review makes reference to the tests used to assess the condition of the thyroid function and mentions their advantages, limitations and present trends. The determination of TSH by second and third generation procedures allow setting up diagnoses of primary hyperthyroidism and hypothyroidism, even in the subclinical forms of both entities since or hypersecretion or inhibition are respectively exposed, and they also allow prescribing the right dose of 1-Levothyroxine and orienting towards a hypophyseal cause of thyroid dysfunction. T4 determination is of great value for finding out the intensity of thyroid dysfunction and furthermore assessing the effectiven
Determination of Mercuric Ion in Water Samples with a LED Exciting and CCD Based Portable Spectrofluorimeter  [PDF]
Arsenio Mu?oz de la Pe?a, María Isabel Rodríguez-Cáceres, Diego Bohoyo Gil, María del Carmen Mahedero, María del Carmen Hurtado-Sánchez, Reyes Babiano
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.25068
Abstract: The fluorescent characteristics of a fluorimetric chemosensor for mercuric ion, Hg2+, employing a synthesized Rhodamine 6G derivative, have been analyzed. For that, a portable spectrofluorimeter composed of a 515 nm LED as excitation source, two fiber-optics and a CCD camera as detector, has been used, intended for “in situ” analysis. A highly selective Rhodamine based probe for Hg2+, that is water soluble and gives a positive response upon analyte binding, is reported. The reagent is bearing a monothiospirolactone group in a Rhodamine 6G architecture and the thiol atom served for the direct attack of thiophilic Hg2+. The fluorescence enhancement is attributed to the spirolactone ring opening and the coordination of two sulphur atoms to Hg2+ giving a 2:1 reagent: Hg2+ stoichiometry complex.
Repeated Labilization-Reconsolidation Processes Strengthen Declarative Memory in Humans
Cecilia Forcato,María L. C. Rodríguez,María E. Pedreira
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0023305
Abstract: The idea that memories are immutable after consolidation has been challenged. Several reports have shown that after the presentation of a specific reminder, reactivated old memories become labile and again susceptible to amnesic agents. Such vulnerability diminishes with the progress of time and implies a re-stabilization phase, usually referred to as reconsolidation. To date, the main findings describe the mechanisms associated with the labilization-reconsolidation process, but little is known about its functionality from a biological standpoint. Indeed, two functions have been proposed. One suggests that destabilization of the original memory after the reminder allows the integration of new information into the background of the original memory (memory updating), and the other suggests that the labilization-reconsolidation process strengthens the original memory (memory strengthening). We have previously reported the reconsolidation of human declarative memories, demonstrating memory updating in the framework of reconsolidation. Here we deal with the strengthening function attributed to the reconsolidation process. We triggered labilization-reconsolidation processes successively by repeated presentations of the proper reminder. Participants learned an association between five cue-syllables and their respective response-syllables. Twenty-four hours later, the paired-associate verbal memory was labilized by exposing the subjects to one, two or four reminders. The List-memory was evaluated on Day 3 showing that the memory was improved when at least a second reminder was presented in the time window of the first labilization-reconsolidation process prompted by the earlier reminder. However, the improvement effect was revealed on Day 3, only when at least two reminders were presented on Day2 and not as a consequence of only retrieval. Therefore, we propose central concepts for the reconsolidation process, emphasizing its biological role and the parametrical constrains for this function to be operative.
Animales de laboratorio en la endocrinología: Biomodelos de las enfermedades tiroideas
Hugues Hernandorena,Beatriz; Rodríguez González,Julio César; Rodríguez García,Julio César; Marrero Rodríguez,María Teresa;
Revista Cubana de Endocrinolog?-a , 2002,
Abstract: the animal models used in the investigations on thyroid help to study the pathogenic mechanisms leading to the appearance of disorders of this gland, and give the opportunity to find new treatments and ways of prevention. the objective of this paper was to provide a detailed information on the biomodels of diseases affecting the thyroid, starting from a bibliographic review on this topic, including those obtained in a spontaneous or induced way, and explaining the environmental factors influencing them. to conclude, the advantages of these biomodels for the researchers devoted to study this branch of endocrinology were stressed, although they are not an exact reflex of what happens in man and they do not necessarily have all the distinctive features of thyroid pathology.
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