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Search Results: 1 - 10 of 10400 matches for " Jaime;Espinoza Paz "
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Erosión del suelo, escurrimiento y pérdida de nitrógeno y fósforo en laderas bajo diferentes sistemas de manejo en Chiapas, México
Camas Gómez, Robertony;Turrent Fernández, Antonio;Cortes Flores, José Isabel;Livera Mu?óz, Manuel;González Estrada, Adrián;Villar Sánchez, Bernardo;López Martínez, Jaime;Espinoza Paz, Néstor;Cadena I?iguez, Pedro;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: in chiapas, mexico, soil erosion is the main problem affecting the sustainability of hillside lands. as a result, yields and incomes are low, and soil quality continues to decrease. with the aim of finding sustainable technological alternatives, an evaluation was performed on the following systems: maize in conservation tillage (mlc); maize in plant barriers (mbmv) and maize alternated with fruit trees (miaf), in terms of surface runoff, production of sediments and loss of nitrogen and phosphorous from june to november, 2009. the systems were set up in adjacent microbasins, belonging to the basin of river catarina, jiquipilas, chiapas. the soil is a typic haplustepts, with a slope that varies between 3 0 and 40%. out of the total rainfalls, 54% caused soil erosion, 15 % of these with rains of over 40 mm 62% of the total erosion. the runoff coefficient and the specific soil degradation were similar and lower in the micro basins; miaf (12, 5.8 t ha-1) and mbmv (13, 6.3 t ha-1 ) than in the microbasin with mlc (19, 16.8 t ha-1), respectively. in miaf, the runoff filter and total cover provided by maize and bean plants during most of the growth season played an important part in obtaining these results, despite this microbasin presenting a greater slope steepness and length. in regards to the nutrients, there was a greater loss of nitrates in the microbasin with the system mbmv, possibly due to the nitrogen contribution by the leftovers of the pruning ofgliricidia sepium. in regard to phosphorous, the system miaf displayed a greater loss, caused by the yearly phosphoric fertilization performed on the guava trees for three years.
Púrpura trombocitopénica autoinmune. Informe de 108 casos
Covarrubias Espinoza, Roberto;Sotelo Cruz, Norberto;Hurtado Valenzuela, Jaime Gabriel;
Boletín médico del Hospital Infantil de México , 2004,
Abstract: introduction. autoimmmune thrombocytopenic purpura (atp) is a hemorrhagic disease with a more frequent presentation in infancy. could appear with an all level of bleeding and sometimes involves the central nervous system (cns). it is divided in 2 groups: the acute thrombocytopenic purpura (a-atp) and the chronic form (c-atp). objectives. to identify the presentation, evaluation and therapeutic modalities applied to patients with a-atp. material and methods. we realized a retrospective study in the internal medicine. unit at the children's hospital in the state of sonora, detecting 108 patients with the diagnosis of atp in the last 10 years. the variables studied were: age gender, clinical features, complications, treatment and evolution. results. we observed that the disease was more frequent in children under 6 years of age; there were no significant differences regarding gender, and the most common symptoms were bleeding of mucocutaneous tissues: 89% of the patients received treatment with prednisone; gammaglobulin and danazol in 4.5% and splenectomy 11 cases (14.5%); no evidence of mortality due to cns hemorrhage; 85% presented remission and 15% went to chronicity. urgent splenectomy was not required in our group, but these who underwent this type of surgery were cured in 91%. conclusions. being atp an autoimmune disease the majority of patients may go under remission even without treatment; however, we have observed better results in the use of steroids, shortening their hospital stay; in this series we did not had any of the most severe complications of atp.
Cistatina C y adiponectina en pacientes diabéticos tipo 2 coronarios y no coronarios
Wolff F,Carlos; Durruty A,Pilar; Espinoza R,Jaime; Ripamonti Z,Soledad; Díaz C,Jaime;
Revista médica de Chile , 2009, DOI: 10.4067/S0034-98872009000600001
Abstract: background: patients with type 2 diabetes have a high incidence of coronary artery disease, which is even higher among those with renal failure. a serum level of cystatin c are used to assess renal function and is a potential cardiovascular risk factor. adiponectin is an anti-atherogenic factor. aim: to measure cystatin c and adiponectin in type 2 diabetic patients with and without coronary artery disease. material and methods: nine diabetic patients with coronary artery disease aged 76± 10 years, 20 diabetics without coronary artery disease aged 61 ±5 years and 20 non diabetic subjects aged 57±10 years, were studied. results: serum levels of cystatin c (mg/l) were 1.5 (range 0.89-219), 0.81 (range 0.71-1.08) and 0.68 mg/l (range 055-0.75) in diabetics with and without coronary artery disease and controls, respectively (p <0.0001). no differences in adiponectin between groups and no association between cystatin c and adiponectin, were observed. no association between both parameters and body mass index orglycosilated hemoglobin ale was observed. cystatin c had a positive correlation with serum creatinine (r =0.57p <0.001). conclusions: diabetics with coronary artery disease have higher levels of cystatin c, that are closely correlated with serum creatinine levels.
Variación de alelos del gen receptor de dopamina DRD4 en escolares chilenos de diferente origen étnico y su relación con riesgo de déficit atencional/hiperactividad DRD4 dopamine receptor alleles in Chilean students of different ethnic origin and its relation with the risk for attention deficit/hyperactivity disorder
Paula Rothhammer,Liza Paz Lagos,Yolanda Espinoza-Parrilla,Francisco Aboitiz
Revista médica de Chile , 2012,
Abstract: Background: Worldwide diversity of alleles of D4 receptor gene (DRD4), linked to attention deficit hyperactivity disorder (ADHD), is mostly the result of length and single nucleotide polymorphisms in a 48-bp tandem repeat (VNTR). Alleles containing from two (2R) to eleven (11R) repeats have been identified. The most common are 4R, 7R and 2R. Aim: To study the association of ADHD risk with DRD4 genotypes in Chilean students. Subjects and Methods: ADHD risk data were obtained through the abbreviated Conner's Scale for School Teachers in 66 Aymara children (11 cases and 55 controls), 91 Rapa-Nui children (60 cases ad 31 controls) and 96 children from a mixed urban population from Santiago (51 cases and 45 controls). DNA extracted from saliva was amplified by polymerase chain reaction (PCR) to genotype the DRD4 VNTR. Results: The distribution of DRD4 alleles reveals that, beneath the 4R allele, 7R exhibits the second highest frequencies in Aymara and Santiago children. In Polynesian children, 2R ranks after 4R. A statistically significant association between ADHD risk and 2R/4R genotype was identified in Polynesian children (p < 0.05; odds ratio = 3.7). Conclusions: Different DRD4 genotypes are associated with ADHDphenotype in Chilean populations, probably as a consequence of their initial colonization history.
Portal hypertension-related inflammatory phenotypes: From a vitelline and amniotic point of view  [PDF]
Maria-Angeles Aller, Natalia Arias, Isabel Prieto, Luis Santamaria, Maria-Paz de Miguel, Jorge-Luis Arias, Jaime Arias
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.37110
Abstract: Prehepatic portal hypertension induces a splanchnic low-grade inflammatory response that could switch to high-grade inflammation with the development of severe and life-threatening complications when associated with chronic liver disease. The extraembryonic origin of the portal system maybe determines the regression to an extraembryonic phenotype, i.e., vitellogenic and amniotic, during the evolution of both types of portal hypertension. Thus, prehepatic portal hypertension, or compensated hypertension by portal vein ligation in the rat, is associated with molecular mechanisms related to vitellogenesis, where hepatic steatosis and splanchnic angiogenesis stand out. In turn, extrahepatic cholestasis in the rat induces intrahepatic portal hypertension, or decompensated hypertension, with ascites and hepatorenal syndrome. The splanchnic interstitium, the mesenteric lymphatic system, and the peritoneal mesothelium seem to create an inflammatory pathway that could have a key pathophysiological relevance in the production of ascites. The hypothetical comparison between the ascitic and the amniotic fluid also allows for translational investigation. The induced regression of the splanchnic system to extraembryonic functions by portal hypertension highlights the great relevance of the extraem-bryonic structures even during postnatal life.
Cistatina C y adiponectina en pacientes diabéticos tipo 2 coronarios y no coronarios Cystatin C and adiponectin in diabetics with and without coronary artery disease
Carlos Wolff F,Pilar Durruty A,Jaime Espinoza R,Soledad Ripamonti Z
Revista médica de Chile , 2009,
Abstract: Background: Patients with type 2 diabetes have a high incidence of coronary artery disease, which is even higher among those with renal failure. A serum level of cystatin C are used to assess renal function and is a potential cardiovascular risk factor. Adiponectin is an anti-atherogenic factor. Aim: To measure cystatin C and adiponectin in type 2 diabetic patients with and without coronary artery disease. Material and methods: Nine diabetic patients with coronary artery disease aged 76± 10 years, 20 diabetics without coronary artery disease aged 61 ±5 years and 20 non diabetic subjects aged 57±10 years, were studied. Results: Serum levels of cystatin C (mg/L) were 1.5 (range 0.89-219), 0.81 (range 0.71-1.08) and 0.68 mg/L (range 055-0.75) in diabetics with and without coronary artery disease and controls, respectively (p <0.0001). No differences in adiponectin between groups and no association between cystatin C and adiponectin, were observed. No association between both parameters and body mass index orglycosilated hemoglobin Ale was observed. Cystatin C had a positive correlation with serum creatinine (r =0.57p <0.001). Conclusions: Diabetics with coronary artery disease have higher levels of cystatin C, that are closely correlated with serum creatinine levels.
Within country differences of the association between parity and overnutrition in Peruvian women
Julio A. Poterico,Carlos A. Huayanay-Espinoza,Rodrigo Carrillo-Larco,J. Jaime Miranda
PeerJ , 2015, DOI: 10.7287/peerj.preprints.363v1
Abstract: Background: Evidence denotes a direct association between parity and overnutrition in developing societies. This work aims to assess the relationship between them in Peruvian women, and to investigate whether this association varies by place of residence and socioeconomic status. Methods: We used secondary data from the National Health and Demographic Survey 2011 of Peru (ENDES 2011). Parity was the independent variable, defined as the number of children ever born to a woman. The outcome variable was the body mass index (BMI), with cut-off points of 25-30 kg/m2 and ≥30 kg/m2, for overweight and obesity; respectively. We included other variables due to their potential confounding or modification effect, such as: age, place of residence, wealth index, education, and frequency of watching television. We used a significance level of 5%. Results: We analyzed information of 18262 women. The mean BMI was 25.9 Kg/m2 (SD±4.6). The overall prevalence of obesity and overweight was of 17.2% and 35.0%, respectively. Rural and urban women reported having had 2.5 (95%CI: 2.4-2.6) and 1.5 (95%CI: 1.4-1.5) ever born children, respectively. We found a positive association between parity and overnutrition, and identified the effect modification of place of residence and wealth. The relationship between parity with overweight or obesity was stronger in urban than in rural areas. Women in the bottom and top groups of wealth index showed stronger associations than the other categories of socioeconomic status. Conclusion: Our findings suggest that the more childbirths a woman has, the more likely she is of being overweight or obese. This relationship varies by socioeconomic status and area of residence. Identification of increased BMI in women, especially after the first childbirth, should be evaluated in primary care to establish adequate public health policies to tackle obesity in Peruvian women.
Comparación entre el clivaje temprano y el estadio pronuclear como parámetros de referencia para inducir el embarazo en pacientes ovoreceptoras en Cali (Colombia)
Estela-Paz,María Esther; Saavedra-Saavedra,Jaime; Moyano,Martha Norah;
Revista Colombiana de Obstetricia y Ginecología , 2009,
Abstract: introduction: some authors have proposed that non-invasive embryo implantation methods (based on early cleavage or pronuclear stage for two cells 25 and 27 hours post-insemination) are applicable to in vitro fertilisation programmes, thereby increasing the probability of implantation and pregnancy. objective: comparing pregnancy rates in patients implanted with embryos originating from early cleavage to those from the pronuclear stage. methodology: a retrospective cohort study was carried out. embryo implantation patients were included who had been attending the fecundar -biomedicine centre in cali, colombia, from april 2004 to december 2007 who presented a poor responsetothecontrolledovarianstimulationcycle, age factor and/or ovarian failure and pregnancy substitute patients. the sample consisted of 45 patients; 36 patients (79%) were expected to become pregnant in the early-syngamy and cleavage group (group 1) and 9 patients (21%) in the pronuclear group (group 2). implantation and pregnancy rates were determined and the chi-square (x2) test was used for comparing both groups. results: 183 of the 289 zygotes complied with the proposed parameters (i.e. embryos from early cleavage, syngamy and pronuclear stage 25 and 27 hours post-insemination); 79% of these 183 came from the early cleavage and syngamy stage and 21% from the pronuclear stage. three embryos on average were transferred to embryo implantation patient; average age was 38, the pregnancy rate obtained when transferring early cleavage embryos was 44% compared to 41% for non-cleaved embryo transfer 25 hours post-insemination. no statistically significant differences were found regarding how pregnancy was induced. conclusion: equal success rates were obtained for both procedures in the given study conditions.
Comparación entre el clivaje temprano y el estadio pronuclear como parámetros de referencia para inducir el embarazo en pacientes ovoreceptoras en Cali (Colombia) Comparing early cleavage and pronuclear state as reference parameters for inducing pregnancy in embryo implantation patients in Cali, Colombia
María Esther Estela-Paz,Jaime Saavedra-Saavedra,Martha Norah Moyano
Revista Colombiana de Obstetricia y Ginecología , 2009,
Abstract: Introducción: algunos autores han propuesto métodos no invasivos que se centran en el clivaje temprano del estadio de dos células a las 25 y 27 horas luego de ocurrida la inseminación, los cuales son aplicables a los programas de fertilización in vitro que aumentan la probabilidad de implantación y embarazo. Objetivo: comparar la tasa de embarazo en pacientes ovoreceptoras con embriones provenientes de clivaje temprano con respecto a la del estadio pronuclear. Metodología: se realizó un estudio de cohorte retrospectivo, en el cual se incluyeron a las pacientes ovoreceptoras que asistieron entre abril de 2004 y diciembre de 2007 al Centro de Biomedicina -FECUNDAR en Cali (Colombia) por presentar baja respuesta al ciclo de estimulación ovárica controlada, factor edad, falla ovárica o por ser pacientes subrogadas o gestacionales. El tama o de la muestra se dividió de la siguiente manera: el porcentaje de embarazo esperado para el grupo de clivaje temprano-singamia (grupo 1) fue 79% (36 pacientes) mientras que el porcentaje de embarazo para el grupo pronuclear (grupo 2) llegó a ser 21% (9 pacientes). A partir de la obtención de estos datos, se determinaron las tasas de implantación y de embarazo y se compararon los dos grupos por medio de la prueba Chi-cuadrado (X2). Resultados: de un total de 289 cigotos, se incluyeron 183 que cumplieron los parámetros propuestos, entre embriones provenientes de clivaje temprano (CT), singamia (S) y estadio pronuclear (PN) a las 25 y 27 horas posinseminación. De este total, 79% provenían del estadio clivaje temprano-singamia y 21% del estadio pronuclear. El promedio de embriones transferidos a las pacientes ovoreceptoras fue tres embriones, la edad promedio fue 38 a os, la tasa de embarazo obtenida al transferir los embriones provenientes de clivaje temprano fue 44% en comparación con 41% para la transferencia de los embriones no clivados a las 25 horas posinseminaci ón. Finalmente, no se encontraron diferencias significativas en la obtención del embarazo. Conclusión: bajo las condiciones del estudio, el resultado muestra que no hay diferencias en la tasa de éxitos para ambos procedimientos. Introduction: some authors have proposed that non-invasive embryo implantation methods (based on early cleavage or pronuclear stage for two cells 25 and 27 hours post-insemination) are applicable to in vitro fertilisation programmes, thereby increasing the probability of implantation and pregnancy. Objective: comparing pregnancy rates in patients implanted with embryos originating from early cleavage to those from the pronuclear stage.
Determinación de arsénico en abastecimientos de agua para consumo humano de la provincia de Cartago, Costa Rica
Montero-Campos,Virginia; Quesada-Kimsey,Jaime; Ledezma-Espinoza,Aura; Sandoval-Mora,José A;
Acta Médica Costarricense , 2010,
Abstract: aim: to disclose scientific knowledge about hydroarsenicism in latin america, as well as to determine the presence of arsenic in water used for human consumption in risk areas of costa rica, specifically at the central, oreamuno, paraíso and alvarado counties of the province of cartago. methods: quantification of inorganic arsenic by hydride generation and flame atomic absorption, according to method 7062 of the us agency of environmental protection. results: none of the analyzed samples surpassed the maximum limit of 10 μg/l allowed by the present costa rican legislation. conclusion: even though sampled areas are of volcanic nature and therefore of arsenic risk, the population consumes water of direct underground origin with a great superficial influence and little or no contact to deeper volcanic rock, thus not contaminated with arsenic.
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