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Search Results: 1 - 10 of 14361 matches for " Antonieta;Castro "
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Soil and Leaf Micronutrient Composition in Contrasting Habitats in Podzolized Sands of the Amazon Region  [PDF]
María Antonieta Sobrado
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.410235
Abstract:

Plant macronutrient distribution in podzolized sands of the Amazon caatinga has received attention in several studies; however, the distribution of micronutrients has not been assessed. Soil micronutrient availability has been hypothesized to reflect contrasting habitat characteristics as well as fundamental differences in substrate, and leaf micronutrient composition may reflect the macronutrient content needed to maintain balance for leaf cell functions. In this study, soil and leaf samples were obtained in a toposequence (valley, slope, and mound). Available soil micro- and macronutrients as well as total leaf content were measured by inductively coupled plasma-atomic emission spectrometer and mass spectroscopy. Soil Zn (<1.41 mg·kg-1) and B (<0.31 mg·kg-1) as well as Cu (<1.33 mg·kg-1) levels were very low. Soil Mn was low in the valleys and slopes (0.62-0.87 mg·kg-1), but higher in the mound (6.59 mg·kg-1). Soil Fe (11.48-21.13 mg·kg-1) was well above the critical level in all of

La autoeficacia docente para la resolución de conflictos entre profesores
Castro-Carrasco,Pablo Javier; Porra,Carla; Flores,Antonieta; Narea,Marigen; Lagos,Amalia;
Educación y Educadores , 2012,
Abstract: objective: the purpose of this study was to describe and interpret the process whereby beliefs about self-effectiveness for conflict resolution are created and change in a group of novice teachers during their first year of professional practice at private and state-supported schools in the communities of la serena and coquimbo (chile). method: a qualitative approach was used, through the application of three episodic interviews involving four participants, for a total of 12 interviews, in addition to a log to record conflictive episodes in the school context. results: the study underscored the importance of the impact of the "reality shock" experienced by the four teachers, the value placed on motivational process, and the significance of social persuasion or professional socialization in incorporating new teachers into the profession.
La autoeficacia docente para la resolución de conflictos entre profesores A autoeficácia docente para a resolu o de conflitos entre professores Self-effectiveness for Resolving Conflicts among Teachers
Pablo Javier Castro-Carrasco,Carla Porra,Antonieta Flores,Marigen Narea
Educación y Educadores , 2012,
Abstract: Objetivo: describir e interpretar el proceso de construcción y cambio de las creencias de auto eficacia en la resolución de conflictos de un grupo de docentes nóveles de colegios particulares y subvencionados de las comunas de La Serena y Coquimbo, Chile, en su primer a o de inserción profesional. Método: cualitativo, mediante la aplicación de tres entrevistas episódicas a cuatro participantes, para un total de 12 entrevistas, además, una bitácora para el registro de episodios de conflictos en el contexto escolar. Resultados: se destaca la importancia del impacto generado a través del conocido fenómeno de "choque con la realidad" en los cuatro docentes, el valor otorgado a los procesos motivacionales y la significación de la persuasión social o socialización profesional en la inserción de los profesores. Objetivo: descrever e interpretar o processo de constru o e mudan a das cren as de autoeficácia na resolu o de conflitos de um grupo de docentes principiantes de colégios particulares e subsidiados das comunidades de La Serena e Coquimbo, Chile, em seu primeiro ano de inser o profissional. Método: qualitativo, mediante a aplica o de três entrevistas episódicas a quatro participantes, para um total de 12 entrevistas; além disso, um guia para o registro de episódios de conflitos no contexto escolar. Resultados: destaca-se a importancia do impacto gerado pelo conhecido fen meno de "choque com a realidade" nos quatro docentes, o valor outorgado aos processos motivacionais e a significa o da persuas o social ou socializa o profissional na inser o dos professores. Objective: The purpose of this study was to describe and interpret the process whereby beliefs about self-effectiveness for conflict resolution are created and change in a group of novice teachers during their first year of professional practice at private and state-supported schools in the communities of La Serena and Coquimbo (Chile). Method: A qualitative approach was used, through the application of three episodic interviews involving four participants, for a total of 12 interviews, in addition to a log to record conflictive episodes in the school context. Results: The study underscored the importance of the impact of the "reality shock" experienced by the four teachers, the value placed on motivational process, and the significance of social persuasion or professional socialization in incorporating new teachers into the profession.
CXCR4+ and SDF-1+ Bone Marrow Cells Are Mobilized into the Blood Stream in Acute Myocardial Infarction and Acute Ischemia  [PDF]
José Luis Aceves, Rafael Vilchis, María Antonieta Medina, Monserrat Borja, Silvia Cortes, Guillermo Díaz, Armando Castro, Alexis Gómez, José J. Parra, Martha Alvarado, Manuel López Hernández, Virna Poveda, Felipe Masso, Luis F. Monta?o
World Journal of Cardiovascular Diseases (WJCD) , 2014, DOI: 10.4236/wjcd.2014.47045
Abstract: Cell therapy has shown beneficial effects on ventricular function and tissue regeneration in patients with acute and chronic myocardial infarction, although with diverse grades of variability in the results, possibly by proportion, subtype and cell cycle status. Objective: Identify and phenotypically characterize, via CXCR4 and SDF-1 expression, the bone marrow cell subpopulations that are mobilized into the bloodstream in patients with Acute Myocardial Infarction (AMI) and Acute Ischemia (AI) such as acute angina and Chronic Ischemia (CI) such as chronic stable angina, and also determine the cell cycle status of these cells. Method: Patients with AMI and AI were recruited in the ICCU, and patients with CI in the departments of cardiology and cardiovascular surgery. The quantification of cellular subpopulations was made by cytofluorometry with a FACS caliburcyto fluorometry (Becton Dickinson) with specific FITC-labeled anti human monoclonal antibodies against CD34, CD133, CD117, CD48, CXCR4, SDF-1 and Ki67 (Becton Dickinson). Serum concentration of IL-6 and IL-8 were determined by a sequential solid phase chemiluminescent assay performed in a SIEMENS IMMULITE 1000 Analyzer. Statistical analysis was made with the SPSS version 20.0 for Windows. A p value < 0.05 was considered as statistical significant. Results: We analyzed 174 patients. 67 had Acute Myocardial Infarction, 55 Acute Ischemia and 52 Chronic Ischemia. Total cellularity of bone marrow and SDF-1+ cells was significantly higher in patients with AMI (14.6 ± 1.5 × 103/ml) than that in AI (9.2 ± 1.3 × 103/ml) and CI (6.6 ± 1.1 × 103/ml) patients (p < 0.001). There were no significant differences in the amount of CD34+, CD117+, CD133+ and CD48+ cells between AMI (49.9 ± 3.9, 45 ± 4.7, 43.2 ± 3.7, 35.4 ± 6.7 respectively) and AI (36.7 ± 2.5, 36 ± 3.2, 33.7 ± 5.1, 32 ± 5 respectively) patients (p = 0.22 to 0.39), but interestingly in AMI and AI patients, cells were CXCR4+ in almost half of these mobilized cells, although the proportion was significantly higher in AMI patients (46.8% ± 7.1% to 55.7% ± 6.3% vs 23% ± 1.6% to 28.4% ± 2.1%, p = 0.03 to 0.05). A similar behavior was observed with the Ki67 antibody (29.9% ± 2.1% to 36.1% ± 6.3% vs 10% ± 1.2% to 24% ± 1.1%, p = 0.001 to 0.05). Bivariate analysis of the results showed a significant correlation of the cell proportion in AMI but not in AI and CI patients (p = 0.001 to 0.05; 0.12 to
House improvements and community participation in the control of Triatoma dimidiata re-infestation in Jutiapa, Guatemala
Monroy, Carlota;Bustamante, Dulce Maria;Pineda, Sandy;Rodas, Antonieta;Castro, Xochitl;Ayala, Virgilio;Qui?ónes, Javier;Moguel, Bárbara;
Cadernos de Saúde Pública , 2009, DOI: 10.1590/S0102-311X2009001300016
Abstract: the deterioration or absence of plaster walls in houses and poor hygienic conditions are the most important risk factors for indoor triatoma dimidiata infestation in guatemala. a cross-disciplinary study was conducted addressing t. dimidiata infestation, household hygiene, and housing construction. the study focused on local materials and cultural aspects (including gender roles) that could lead to long-term improvements in wall construction. a new plaster mix for walls was developed on the basis of laboratory studies on construction materials recommended by local villagers. four villages with persistent (post-spraying) t. dimidiata infestation were studied. in two villages, an ecosystem approach was implemented, and the homeowners conducted wall improvements and household sanitation with the support of the interdisciplinary team (the ecosystem intervention). in the other two villages, a vector control approach based on insecticide spraying was adopted (traditional intervention). both interventions were associated with a reduction in t. dimidiata infestation, but only the ecosystem approach produced important housing improvements (sanitation and wall construction) capable of preventing t. dimidiata re-infestation in the long term.
La anticoncepción de emergencia en América Latina y el Caribe
Martin,Antonieta;
Revista Panamericana de Salud Pública , 2004, DOI: 10.1590/S1020-49892004001200012
Abstract: introducing the post-coital birth control method in the family-planning services of latin american countries has not been an easy task. catholic and other conservative groups with great influence in the political arena have time and again stopped it from being adopted as an alternative method and have even succeeded in having it removed from official directives after formal acceptance by health authorities. the main objections are triggered by the erroneous supposition that "emergency contraception" pills are abortifacients. however, a large dose of cultural discrimination against women seems also to be involved. it has been extremely difficult to register dedicated products and make them available in drugstores and even more difficult to distribute them without charge at public health centers. they are hard to find, expensive, and unavailable to adolescents at risk for unwanted pregnancies and to most low-income women, especially in rural areas. dissemination of appropriate information has been scarce and slow and there are still great numbers of people that do not understand how or why the method works. brazil has been the only exception, as its open society has readily accepted this method of contraception. the latin american consortium on emergency contraception founded in the year 2000 and its regional conference two years later had an important impact on the situation, as they encouraged the coordination of efforts by governmental and nongovernmental entities with those of women's groups to fight for sexual and reproductive rights. a number of studies have shown that the more people learn about emergency contraception, the more they find it acceptable and necessary, and radio spots and other media techniques have begun to educate the public about this matter. in spite of the many difficulties encountered, in the last few years several countries have made strides to include this method in their public health guidelines. however, because of the powerful forces a
Paráfrases lexicais: fonte produtiva para defini es e designa es
Antonieta Laface
Alfa : Revista de Linguística , 2001,
Abstract: Trata-se de quest o relativa à pedagogia-ensino do léxico, objeto de estudo e de discuss o nos últimos anos. Considera-se a restri o do vocabulário do estudante como uma das causas do seu mau desempenho escolar. Discutem-se, no presente artigo, atividades com a palavra, encontradas em livros didáticos diversos. Sugere-se um trabalho pedagógico de leitura e de reda o, centrado em paráfrases lexicais, no plano da sinonímia e da parassinonímia, fonte produtiva para defini o e designa es de objeto a ser descrito em contexto discursivo. A análise de um texto de Mill r Fernandes torna-se instrumento para demonstrar a validade deste tipo de trabalho sugerido - uma contribui o para melhor desempenho do estudante.
Aquisi o e amplia o do vocabulário acadêmico - contexto ideológico cultural
Antonieta Laface
Alfa : Revista de Linguística , 2001,
Abstract: Trata-se de uma reflex o sobre o vocabulário de áreas disciplinares, estudadas na escola do segundo grau e desta para a universidade. Com base nos princípios teóricos da lexicologia e da defini o terminológica, pretende-se mostrar a necessidade de sistematiza o de atividades pedagógicas, orientadas para contextos ideológicos. No exemplo dado, foram tomados os critérios de tempo e lugar, trabalhados na área de História, para demonstrar como as defini es podem ser veiculadas no universo de conhecimento.
A orianidade Revisitada: Novas Posturas
Antonieta Costa
Brathair , 2010,
Abstract: The role that the mentality of an era (understood as social thought) has on the world vision and in the attitudes of human communities, in what concerns the representations of the world, is particularly crucial in determining a culture in formation. That might have been the Azorean case. For the understanding of the Azorean culture, it will therefore be necessary to be aware of the basic factors of the mentality of the first quarter of the 15th century, besides the social representations characteristic of each group of settlers. Such an assemblage of factors formed the "Founder Myth", from which standout some marks common to the "Celtic culture", likewise the priority of the spiritual over the temporal.
Utilidad de una prueba serológica multiantigénica en el diagnóstico de tuberculosis
Castro,Claudia Marcela; Porras,Tania Bibiana; Guerrero,Martha Inírida; León,Clara Inés; Mojica,Maria Antonieta; Lara,Martha; Parada,Maria Cristina; Espitia,Clara;
Biomédica , 2005,
Abstract: introduction. the heterogeneity observed in the antigenic recognition pattern of tuberculosis patients makes evident the necesity to search for a fast and readily technique for tuberculosis diagnosis. a test which involves different antigens could improve the sensitivity of the assay. objective. the main objective of the present work is to evaluate a multi-antigen printing immunoassay (mapia) for the serogical diagnosis of tuberculosis. methodology: sera were obtained from 66 patients with tuberculosis disease verified clinically and bacteriologically and from 47 healthy individuals (control group) .sample sera were used for detection of antibodies against 3 enriched mixtures of proteins and 5 unique recombinant antigens. antigens were included in a solid matrix. sensitivity, specificity and predictive values of the test were evaluated and confirmed by a logistic regression analysis. from this analysis the reason of prevalence was obtained and used for the selection of the best antigenic combination results: the sensitivity and specificity values of the individual antigens varied between 5-83% and 9-100%. the enriched mixtures values were better than those obtained with the recombinant antigens. the combinations of several antigens remarkably improved the sensitivity values until an 81%, but in most of the cases we obtained specificity values of 57%. conclusions: the results obtained in the present work, suggest that this test could be useful for screening, but not like definitive test diagnostic.
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