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Search Results: 1 - 10 of 13947 matches for " Isabel Chávez Ruvalcaba "
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El estudio de Trichinella spiralis en modelos experimentales.
Alejandra Moreno G,Claudia Maldonado T,Isabel Chávez Ruvalcaba,Rosa G Reveles H
REDVET , 2012,
Abstract: ResumenSe presenta una breve descripción del estudio de Trichinella spiralis en modelos experimentales, enfocándonos al estudio de la epidemiología, técnicas diagnósticas directas e indirectas, tratamiento y biología del parasito.
Evaluacion del albendazol, ivermectina y nitazoxanida en infeccion causada por trichinella spiralis en modelo suino
María Isabel Chávez Ruvalcaba,Rosa Gabriela Reveles Hernández,Sergio J Saldivar Elias,José Jesús Mu?oz Escobedo
Archivos Venezolanos de Farmacología y Terapéutica , 2006,
Abstract: La Trichinellosis es una enfermedad parasitaria zoonótica que se trasmite de modo accidental al hombre por ingestión de productos cárnicos insuficientemente cocidos, procedentes de animales infectados. En México el cerdo actúa como principal fuente de contaminación, los tratamientos aplicados han sido inespecíficos. Desconocemos a ciencia cierta el tratamiento efectivo para esta enfermedad. Este estudio esta dirigido a conocer si el Albendazol (ABZ), la Nitazoxanida (NZX) y la Ivermectina (IVM) son efectivos en el tratamiento de la fase intestinal (FI) y fase muscular (FM) de la Trichinellosis. Así mismo consideramos conveniente conocer, cual de los tres fármacos es más efectivo contra el parásito T. spiralis en ambas fases. Se utilizaron 18 cerdos raza York, se formaron 10 grupos: 1- Control sano en FI, 2-Control infectado en FI, 3- Infectado tratado con ABZ en FI, 4- Infectado y tratado con NZX en FI, 5- Infectado y tratado con IVM en FI, 6-Control sano en FM, 7-Control infectado en FM, 8- Infectado y tratado con ABZ en FM, 9- Infectado y tratado con NZX en FM, 10- Infectado y tratado con IVM en FM. El grupo 1 y 6 fueron las mismas cifras y de igual forma el 2 y 7 para la realización del análisis estadístico que fue, un dise o experimental completamente al azar y un dise o de tratamientos factorial. Concluyendo que el ABZ además de ser más efectivo en fase intestinal, en fase muscular presenta una eficacia del 100% contra la infección. Trichinellosis is a zoonotic parasitary disease which is accidentally transmitted to men by ingestion of meat products not well cooked, of infected animals. In Mexico the pig is the main source of contamination the applied treatment has been unspecific. The effective treatment for this disease is not truly known. This study is led to know if Albendazole (ABZ), Nitazoxanide (NZX) and Ivermectin (IVM) are effective in the treatment of intestinal phase (IP) and muscular phase (MP) of trichinellosis. Therefore we consider convenient to know what medicament is more effective against the T. spiralis parasite in both phases. 18 York pigs were used, 10 groups were made: 1- healthy control in IP 2- infected control in IP, 3 - infected treated with ABZ in IP, 4 - infected and treated with IVM in IP, 5 - infected and treated with NZX in IP, 6.-healthy control in MP, 7.- infected control in MP, 8- infected and treated with ABZ in muscular phase (MP), 9 - infected and treated with IVM in MP, 10 - infected and treated with NZX in MP. The statistic analysis was an experimental design completely by random and a factorial treatment desi
Evaluacion del albendazol, ivermectina y nitazoxanida en infeccion causada por trichinella spiralis en modelo suino
Chávez Ruvalcaba,María Isabel; Reveles Hernández,Rosa Gabriela; Saldivar Elias,Sergio J; Mu?oz Escobedo,José Jesús; Morales Vallarta,Marío R; Moreno García,María Alejandra;
Archivos Venezolanos de Farmacología y Terapéutica , 2006,
Abstract: trichinellosis is a zoonotic parasitary disease which is accidentally transmitted to men by ingestion of meat products not well cooked, of infected animals. in mexico the pig is the main source of contamination the applied treatment has been unspecific. the effective treatment for this disease is not truly known. this study is led to know if albendazole (abz), nitazoxanide (nzx) and ivermectin (ivm) are effective in the treatment of intestinal phase (ip) and muscular phase (mp) of trichinellosis. therefore we consider convenient to know what medicament is more effective against the t. spiralis parasite in both phases. 18 york pigs were used, 10 groups were made: 1- healthy control in ip 2- infected control in ip, 3 - infected treated with abz in ip, 4 - infected and treated with ivm in ip, 5 - infected and treated with nzx in ip, 6.-healthy control in mp, 7.- infected control in mp, 8- infected and treated with abz in muscular phase (mp), 9 - infected and treated with ivm in mp, 10 - infected and treated with nzx in mp. the statistic analysis was an experimental design completely by random and a factorial treatment design. concluding that the abz besides being but effective in fi in fm it presents an effectiveness of 100% against the infection.
IMPORTANCIA DE LAS INSTITUCIONES DE EDUCACIóN EN EL CUIDADO DEL MEDIO AMBIENTE. EXPERIENCIA DE LA CULTURA AMBIENTAL EN LA UNIVERSIDAD AUTóNOMA DE ZACATECAS. MéXICO
M. en C. José Jesús Mu?oz Escobedo,Dra. en C. María Isabel Chávez Ruvalcaba,Dra. en C. Claudia Maldonado Tapia,M. en BE. Rosa Gabriela Reveles Hernández
REDVET , 2012,
Abstract: Resumen.El momento ambiental por el que cruza nuestro planeta tierra, nos compromete en realizar acciones que permitan mitigar el da o
Evaluation of the Results of Radical Management of a Cohort of 107 Patients with Hepatocellular Carcinoma in Colombia  [PDF]
Sergio Hoyos, Jaime Chávez, álvaro Duarte, Isabel Arenas
Journal of Cancer Therapy (JCT) , 2015, DOI: 10.4236/jct.2015.613123
Abstract: Introduction: Hepatocellular carcinoma (HCC) is the most common primary tumor of the liver and usually appears as part of liver cirrhosis (LC). Its management in the presence of LC is ideally with orthotopic liver transplantation. Surgical resection is indicated only in the presence of a tumor in a patient with a very good liver function and who for medical reasons cannot be carried to transplantation. Materials and Methods: A descriptive study of a prospective and consecutive series of patients undergoing surgery (resection or liver transplantation) for HCC in a hospital in the city of Medellin was performed, from June 2004 to January 2015. A multivariate analysis was carried out of factors associated with survival during the follow-up. Results: 116 surgical interventions for the management of HCC between June 2004 and January 2015 were performed. The analysis included 107 patients, of which 73% were men. The median age of all patients was 60 years. The factors that showed better survival were: patients undergoing transplantation, the presence of cirrhosis, tumor less than 5 cm in diameter, a unique and well-differentiated tumor; however, none of these factors achieved statistical significance. Conclusion: Both resection and liver transplantation, when well indicated achieve good 5-years of survival in patients with HCC.
Restricciones estructurales para la innovación en la biotecnología colombiana
Gorbaneff,Yuri; Aarón,Isabel Cristina; Chávez,Catalina;
Cuadernos de Administración , 2006,
Abstract: this work is an attempt to study innovation in the biotechnology sector in colombia. a study is made of the effects of transaction costs and incomplete contracts in the organizational structures, and in innovation processes. based on a survey applied to 19 biotechnology organizations, transverse-section econometric models were constructed to test the hypothesis. results indicate that innovation takes place in vertically integrated companies; that subcontracting works well only if it is accompanied by economies of scale, or where the product or service subcontracted is simple; and that the barrier to development in biotechnology in colombia is not of the scarcity of resources or on qualified people, but of institutions, which should create incentives for people to develop their capacities.
Restricciones estructurales para la innovación en la biotecnología colombiana Structural restrictions on innovation in Colombian biotechnology
Yuri Gorbaneff,Isabel Cristina Aarón,Catalina Chávez
Cuadernos de Administración , 2006,
Abstract: El trabajo pretende aportar al estudio de la innovación en el sector de biotecnología en Colombia. Para tal fin se analizan los efectos de los costos de transacción y los contratos incompletos en las estructuras organizacionales y en los procesos de innovación. A partir de una encuesta aplicada en 19 organizaciones de biotecnología se construyeron modelos econométricos de corte transversal, para comprobar las hipótesis. Los resultados indican que la innovación se realiza en las empresas integradas verticalmente; que la subcontratación funciona bien solamente cuando está presente la economía de escala o cuando el producto o servicio que se subcontrata es sencillo, y que la barrera para el desarrollo de la biotecnología en Colombia no es la escasez de los recursos ni de las personas preparadas, sino las instituciones, que deberían crean los incentivos para que las personas desarrollen sus capacidades. This work is an attempt to study innovation in the biotechnology sector in Colombia. A study is made of the effects of transaction costs and incomplete contracts in the organizational structures, and in innovation processes. Based on a survey applied to 19 biotechnology organizations, transverse-section econometric models were constructed to test the hypothesis. Results indicate that innovation takes place in vertically integrated companies; that subcontracting works well only if it is accompanied by economies of scale, or where the product or service subcontracted is simple; and that the barrier to development in biotechnology in Colombia is not of the scarcity of resources or on qualified people, but of institutions, which should create incentives for people to develop their capacities.
Diagnóstico de laboratorio en pacientes ingresados por infección urinaria en un hospital pediátrico
Chávez Isla,Margarita Isabel; Rodríguez Hechavarría,Félix; Chávez Solís,Leonardo F;
MEDISAN , 2012,
Abstract: a descriptive, longitudinal and retrospective study of 64 patients with urinary infection, admitted at the southern children hospital in santiago de cuba was carried out from january to december, 2010, with the objective of determining some clinical and diagnostic aspects. in most of the hospitalized children, anemia, leucocytosis, accelerated erytrosedimentation, as well as mild leucocyturia prevailed; and among the organisms: escherichia coli, proteus mirabilis and enterobacteriaceae. to verify the presence of these changes, additional tests such as complete blood count, erytrosedimentation, cyturia and urine culture should be indicated as their results facilitate to establish a conclusive diagnosis.
Diagnóstico de laboratorio en pacientes ingresados por infección urinaria en un hospital pediátrico Laboratory diagnosis in patients admitted due to urinary infection in a children hospital
Margarita Isabel Chávez Isla,Félix Rodríguez Hechavarría,Leonardo F Chávez Solís
MEDISAN , 2012,
Abstract: Se realizó un estudio descriptivo, longitudinal y retrospectivo de 64 pacientes con infección urinaria, ingresados en el Hospital Infantil Sur de Santiago de Cuba desde enero hasta diciembre del 2010, con vistas a determinar algunos aspectos clínicos diagnósticos. En la mayoría de los ni os hospitalizados prevalecieron: anemia, leucocitosis, eritrosedimentación acelerada, así como leucocituria ligera; y entre los microorganismos: Escherichia coli, Proteus mirabilis y Enterobacteriaceae. Para verificar la presencia de esas alteraciones, deben indicarse los exámenes complementarios: hemograma completo, eritrosedimentación, cituria y urocultivo, cuyos resultados posibilitan establecer un diagnóstico concluyente. A descriptive, longitudinal and retrospective study of 64 patients with urinary infection, admitted at the Southern Children Hospital in Santiago de Cuba was carried out from January to December, 2010, with the objective of determining some clinical and diagnostic aspects. In most of the hospitalized children, anemia, leucocytosis, accelerated erytrosedimentation, as well as mild leucocyturia prevailed; and among the organisms: Escherichia coli, Proteus mirabilis and Enterobacteriaceae. To verify the presence of these changes, additional tests such as complete blood count, erytrosedimentation, cyturia and urine culture should be indicated as their results facilitate to establish a conclusive diagnosis.
The solid-state and solution-state reassigned structures of tagitinin A, a 3,10-epoxy-germacrolide from Tithonia diversifolia, and the interconversion of 3,10-epoxy-germacrolide conformational families via a ring-atom flip mechanism
Glaser, Robert;García, Abraham;Chávez, María Isabel;Delgado, Guillermo;
Journal of the Brazilian Chemical Society , 2005, DOI: 10.1590/S0103-50532005000300019
Abstract: tagitinin a (2), a known 3,10-epoxy-germacrolide-6,7-trans-lactone isolated from tithonia diversifolia, was investigated by single crystal x-ray diffraction analysis. it was found to have a 1b,4a,6a,7b,8b relative configuration which differed at c(1) from the 1a-orientation originally reported in the literature which was determined by horeau's rule. analysis of the 1h nmr spectrum of 2 shows the molecule to maintain its crystallographically observed twist-chair-boat (tcb) nine-membered ring conformation in acetone-d6 solution. the twist-chair-boat/skew-chair-boat type 3 conformations of saturated/unsaturated nine-membered rings within 3,10-epoxy-germacrolides can be interconverted to the skew-chair-chair (scc) conformation by means of a c(9) ring atom flip mechanism. as a result of this conformational change, the orientation of the c(1) atom and the c(8)-oxycarbonyl moiety are transformed from diequatorial to diaxial. the reported stereochemistry of 3,10-epoxy-germacrolide lactone structures, and the dft b3lyp/6-31g(d) modeling findings in this work indicate that tetrahedral c(1) atoms stabilize the tcb/scb type 3 conformations, while their trigonal counterparts stabilize the scc conformation.
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