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Search Results: 1 - 10 of 40930 matches for " Carolina Escobedo-Martínez "
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Facile Preparation of 1,2-Diols from Chalcones: An NMR Spectroscopy and X-Ray Crystallography Study  [PDF]
Marco A. Obregón-Mendoza, María Miriam Estévez-Carmona, Carolina Escobedo-Martínez, Manuel Soriano-García, Raúl G. Enríquez
International Journal of Organic Chemistry (IJOC) , 2015, DOI: 10.4236/ijoc.2015.53015
Abstract: Structures of 2-(naphthalen-2-ylmethyl)-2,3-dihydro-1H-indene-1,2-diol (C20H18O2), compound 1 and 1-(3,4-dimethoxyphenyl)-3-methoxy-3-(4-nitrophenyl)propane-1,2-diol chloroform (C18H21NO7·CHCl3) compound 2 were established by spectral and X-ray diffraction studies. Compound 1 crystallizes in the orthorhombic space group P212121 with unit cell parameters a = 5.2177 (6), b = 13.903 (2), c = 21.121 (2) A, Z = 4. Compound 2 crystallizes in the triclinic space group P-1 with unit cell parameters a = 9.238 (1), b = 9.879 (1), c = 12.636 (1) A, α = 102.004 (1), β = 92.356 (1), γ = 90.779 (1)o, Z = 2. These two new molecules arise from a facile preparation of 1,2-diols from chalcones and have been fully characterized. Based on the crystallographic information obtained for compound 1, the relative configuration for the chiral centers is 1S and 2S. In structure 1, both hydroxyl groups adopt an anti-conformation with a torsion angle O1-C1-C2-O2 value of 93.1 (2)o [in molecule 2, both hydroxyl groups adopt a trans-conformation with a torsion angle O1-C1-C2-O2 value of 171.0 (2)]. In both structures, the molecules in the crystal are linked by intermolecular hydrogen bonds O-H···O and C-H···O interactions and adjacent molecules are interconnected by intermolecular weak C-H···π and C-H···Cl interactions which give additional support to molecular packing stability.
Crystal Structure, Synthesis and Biological Activity of Ether and Ester Trans-Ferulic Acid Derivatives  [PDF]
Marco A. Obregón-Mendoza, M. Mirian Estévez-Carmona, Yair Alvarez-Ricardo, William Meza-Morales, Carolina Escobedo-Martínez, Manuel Soriano-García, Raúl G. Enríquez
International Journal of Organic Chemistry (IJOC) , 2018, DOI: 10.4236/ijoc.2018.84028
Abstract: The structures of methoxymethyl (E)-3-(4-hydroxy-3-methoxyphenyl)acrylate, 2; (E)-3-(3-methoxy-4-(methoxymethoxy)phenyl)acrylic acid, 3; methyl (E)- 3-(4-(benzyloxy)-3-methoxyphenyl)acrylate, 4; benzyl (E)-3-(4-(benzyloxy)- 3-methoxyphenyl)acrylate, 6; and (E)-3-(4-(benzyloxy)-3-methoxyphenyl)- acrylic acid, 7; were established by spectroscopic and X-ray diffraction studies. Structure 2 is a new com-pound. Compounds with free phenolic hydroxyls v.gr. methyl (E)-3-(4-hydroxy-3-methoxyphenyl)acrylate 1, 2 and ben-zyl(E)-3-(4-hydroxy-3-methoxyphenyl)acrylate 5, showed scavenging free- radical and antioxidant activity while moderate scavenging free-radical was observed in compound 3. Moderate inhibition of lipid peroxidation was observed for 7. Compound 5 exerted significant inhibition of cell growth in PC-3, K562 tumor cell lines and 4 exhibited the largest cytotoxic effect upon the K562 cell line.
Características hidrográficas y sedimentológicas en el estuario del río Aconcagua, Chile Central
Carolina Martínez,Carolina Cortez
Revista de Geografía, Norte Grande , 2007,
Abstract: Se presentan las características hidrográficas del estuario Aconcagua, en Chile Central (32° 55 S y 71° 30 30 O), obtenidas en una campa a hidrográfica realizada en abril de 2001. En este estuario micromareal, se obtuvieron datos de batimetría, salinidad, temperatura, turbidez y sedimentos superficiales. Los resultados indican la presencia de una intrusión salina favorecida por la morfología del fondo, con tendencia al estado hipersincrónico. Se observó una estratificación de la columna de agua en profundidad y aumento de valores de salinidad indicando cu a salina. Al interior de la laguna estuarial somera (30 cm de profundidad), se observó abundancia de gravas, gravillas y arenas, mientras que asociadas a las mayores profundidades (hasta 4 m), se identificó una granulometría fina que grada entre arena limosa y limo-arcilla.
La salud mental en un contexto de pobreza urbana: una aproximación cualitativa
Martínez S,Carolina;
Revista Facultad Nacional de Salud Pública , 2009,
Abstract: objective: with the premise that there is a strong relationship between mental health problems and the characteristics of the world in which people live, this article analyzes the findings of a qualitative inquiry about the situation of a small group of low-income urban families in mexico at the end of the 20th century. it proposes also a reflection about the contributions of this kind of approach to achieve a better understanding of the complex constellations that give rise to mental health disturbances in each context. methodology: the interpretation offered in this paper is oriented by a postkleinian psychoanalytic model developed for the study of the influence of the family and community contexts on the person?s psychic structure. the data analyzed was collected several years ago by means of direct observation and in-depth personal interviews to each member of twenty low-income urban families living in the south of mexico city. results: the analysis oriented by this model showed different types of family emotional dynamics and its influence on the psychic structure and function of their members. it was found a low coverage of public health services for this group of population, and specially a lack of preventive and curative mental health services.
Nos habla en el camino: Consideraciones preliminares en torno al sujeto, objeto y método de una Teología Pastoral Inter Loci
Carolina Bacher Martínez
Teología y vida , 2012,
Abstract: En el marco del II Coloquio de Teología Práctica la autora describe el enfoque teológico pastoral Inter loci emergente en la comunidad teológica argentina. La reflexión comienza con una descripción del objeto, sujeto y método de la teología pastoral en general. Luego presenta una breve descripción de la propuesta, subrayando el diálogo constitutivo que comporta con el enfoque cualitativo de las ciencias sociales. Se detiene en las tres notas que caracterizan el procedimiento: la intersubjetividad, la interdisciplinariedad y la inter-arealidad teológica. Para concluir indica algunos interrogantes a partir del contexto latinoamericano. In the framework of the Second Colloquium of Practical Theology, the author describes the Inter loci pastoral theological approach emerging in the Argentine theological community. The reflection begins with a description of the object, subject and method of pastoral theology in general. There is then a brief description of the proposal, emphasizing the constituent dialogue that it entails with the qualitative approach of the social sciences. She pauses on three notes that characterize the procedure: intersubjectivity, interdisciplinarity and theological in-terreality. To conclude, she offers some questions from a Latin American context.
Mental health in a context of urban poverty: a qualitative approach
Carolina Martínez S
Revista Facultad Nacional de Salud Pública , 2009,
Abstract: Objective: With the premise that there is a strong relationship between mental health problems and the characteristics of the world in which people live, this article analyzes the findings of a qualitative inquiry about the situation of a small group of low-income urban families in Mexico at the end of the 20th century. It proposes also a reflection about the contributions of this kind of approach to achieve a better understanding of the complex constellations that give rise to mental health disturbances in each context. Methodology:The interpretation offered in this paper is oriented by a postkleinian psychoanalytic model developed for the study of the influence of the family and community contexts on the person’s psychic structure. The data analyzed was collected several years ago by means of direct observation and in-depth personal interviews to each member of twenty low-income urban families living in the south of Mexico City. Results:The analysis oriented by this model showed different types of family emotional dynamics and its influence on the psychic structure and function of their members. It was found a low coverage of public health services for this group of population, and specially a lack of preventive and curative mental health services.
De qué se muere en México
Carolina Martínez Salgado
El Cotidiano , 2002,
Abstract: Asomarse al complejo escenario de los problemas de salud de la población a través del estudio de la mortalidad por causa, es un ejercicio tan interesante como necesario para la elaboración de hipótesis sobre las relaciones entre los perfiles de causas de muerte, los elementos de riesgo que podrían estar involucrados en su explicación, y los retos que ésto plantea a la organización de los servicios de atención médica y a las políticas orientadas a corregir los escenarios en los que se originan los riesgos identificados. En las siguientes páginas revisaremos los principales problemas que este ejercicio supone y la riqueza de posibilidades que ofrece.
Población y salud mental en México. Reflexiones y un ejercicio de aproximación mediante las variaciones de la mortalidad por suicidio
Carolina Martínez Salgado
Estudios Demográficos y Urbanos , 2010,
Abstract: En este documento se presenta un conjunto de reflexiones sobre la importancia de atender a los múltiples y complejos vínculos que se tejen entre la dinámica poblacional y los problemas de salud mental. Acompa a a estas reflexiones un ejercicio exploratorio de las variaciones de la mortalidad por suicidio en México de 1990 a 2008, como una modalidad de defunción que ha sido vinculada con cierto tipo de trastornos mentales. El ejercicio, precedido por una revisión de algunos de los principales aportes de las investigaciones en torno a la mortalidad por suicidio realizadas en México en las últimas décadas, se plantea como un primer paso para orientar la formulación de hipótesis en estudios sucesivos sobre los posibles vínculos entre la evolución de los niveles de suicidio y algunos indicadores de los procesos poblacionales. En él se revisa la evolución, durante el periodo considerado, de la distribución proporcional y algunas tasas para las principales características demográficas de los fallecidos por esta causa, la lesión que ocasionó el deceso, el acceso a la atención médica, y las variaciones geográficas de la mortalidad por suicidio analizada desde tres ángulos: su participación proporcional dentro del subconjunto de las muertes violentas, la razón de masculinidad, y las tasas de mortalidad observadas en cada entidad federativa. Con base en esta última información se propone, mediante un análisis de cúmulos, una clasificación preliminar de las entidades en tres grandes conjuntos. El trabajo apunta a varias de las interrogantes que se abren para ser abordadas en aproximaciones ulteriores, y concluye con el se alamiento de los fuertes desafíos implicados en la indagación de estas interrelaciones.
Momentos, Escenarios y Sujetos de la Producción Constituyente. Aproximaciones Críticas al Proceso Constitucional de los Noventa
Jiménez Martín,Carolina;
Análisis Político , 2006,
Abstract: in front of these realities, the convocation to the constituent national assembly was erected as the great political moment for the consolidation of a new society project characterized by a true democratic eticidad. the narratives of the democracy participativa and the consolidation of the peace were constituted in the new securities for the legitimation of the nascent social project. the setting in scene of these narratives allowed the convergence of the diverse social actors in the alternative of summoning to the primary constituent for the formulation of a new political pact. in fact, the idea of the anc was protected with different shades for diverse social and political forces that you/they went from the most progressive tendencies to the most conservative. however, he/she cannot forget that the most interested actor in the construction of a new political letter for the colombians was the executive.
El muestreo en investigación cualitativa: principios básicos y algunas controversias
Martínez-Salgado,Carolina;
Ciência & Saúde Coletiva , 2012, DOI: 10.1590/S1413-81232012000300006
Abstract: this paper presents the rationale for the choice of participants in qualitative research in contrast with that of probability sampling principles in epidemiological research. for a better understanding of the differences, concepts of nomothetic and ideographic generalizability, as well as those of transferability and reflexivity, are proposed, fundamentals of the main types of sampling commonly used in qualitative research, and the meaning of the concept of saturation are mentioned. finally, some reflections on the controversies that have arisen in recent years on various paradigmatic perspectives from which to conduct qualitative research, their possibilities of combination with epidemiological research, and some implications for the study of health issues are presented.
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