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Search Results: 1 - 10 of 455741 matches for " Néstor J; Chamorro "
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Aterosclerosis en sujetos con periodontitis
López,Néstor J; Chamorro,Adriana; Llancaqueo,Marcelo;
Revista médica de Chile , 2011, DOI: 10.4067/S0034-98872011000600004
Abstract: background: chronic infl ammation and infections are involved in the development and progression of atherosclerotic vascular disease. aim: to evaluate the association between periodontitis and early atherosclerosis. material and methods: fifty-three subjects who received periodontal treatment and regular maintenance for at least 10 years, and 55 subjects with periodontitis but without a history of periodontal treatment were studied. carotid artery intima-media wall thickness (cimt) was measured with high-resolution b-mode ultrasonography. a blood sample was obtained to measure high sensitivity c-reactive protein, fibrinogen, lipoprotein cholesterol, leukocyte count and erythrocyte sedimentation rate. covariates included age, gender, smoking, level of education, body mass index and physical activity. the benzoyl-dl-arginine-naphthylamide (bana) test was used to determine the number of periodontal sites with periodontal pathogens. results: cimt value was significantly higher in subjects with periodontitis than those without it (0.775 ± 0.268 and 0.683 ± 0.131 mm respectively, p = 0.027). c-reactive protein, leukocyte count and percentage of sites with periodontal pathogens were also significantly higher in subjects with periodontitis. regression analysis identified age, periodontitis, and smoking as independent predictors of cimt. conclusions: these results suggest that untreated periodontitis is associated with early atherosclerotic carotid lesions and higher levels of infl ammatory markers.
Aterosclerosis en sujetos con periodontitis Association between atherosclerosis and periodontitis
Néstor J López,Adriana Chamorro,Marcelo Llancaqueo
Revista médica de Chile , 2011,
Abstract: Background: Chronic infl ammation and infections are involved in the development and progression of atherosclerotic vascular disease. Aim: To evaluate the association between periodontitis and early atherosclerosis. Material and Methods: Fifty-three subjects who received periodontal treatment and regular maintenance for at least 10 years, and 55 subjects with periodontitis but without a history of periodontal treatment were studied. Carotid artery intima-media wall thickness (CIMT) was measured with high-resolution B-mode ultrasonography. A blood sample was obtained to measure high sensitivity C-reactive protein, fibrinogen, lipoprotein cholesterol, leukocyte count and erythrocyte sedimentation rate. Covariates included age, gender, smoking, level of education, body mass index and physical activity. The benzoyl-DL-arginine-naphthylamide (BANA) test was used to determine the number of periodontal sites with periodontal pathogens. Results: CIMT value was significantly higher in subjects with periodontitis than those without it (0.775 ± 0.268 and 0.683 ± 0.131 mm respectively, p = 0.027). C-reactive protein, leukocyte count and percentage of sites with periodontal pathogens were also significantly higher in subjects with periodontitis. Regression analysis identified age, periodontitis, and smoking as independent predictors of CIMT. Conclusions: These results suggest that untreated periodontitis is associated with early atherosclerotic carotid lesions and higher levels of infl ammatory markers.
La Estratificación en la Política Pública y la Competitividad Urbana
Néstor J. Sanabria,Willington Ortiz Rojas
Convergencia , 2005,
Abstract: El presente artículo discute los alcances y las implicaciones que conlleva, en términos de la ejecución de políticas públicas y de la competitividad ur bana, la implementación del proceso de estratificación socioeconómica de los hogares. Se abordan diferentes aspectos desde la organización ur bana y so cial como aquellos que fundan la misma necesidad de la clasificación; desde la eficiencia, la eficacia y la equidad de las políticas públicas, y; desde la misma construcción teórica y estadística del instrumento de estratificación. Así mismo, se muestra como la inclusión de elementos que reflejen una realidad so cial compleja y dinámica, al in te rior de los modelos de estratificación, contribuye enormemente a disminuir ineficiencias y a lograr los objetivos que se persiguen con la estratificación.
Human intoxication with paralytic shellfish toxins: Clinical parameters and toxin analysis in plasma and urine
GARCíA,CARLOS; LAGOS,MARCELO; TRUAN,DOMINIQUE; LATTES,KARINNA; VéJAR,OMAR; CHAMORRO,BEATRIZ; IGLESIAS,VERóNICA; ANDRINOLO,DARíO; LAGOS,NéSTOR;
Biological Research , 2005, DOI: 10.4067/S0716-97602005000200009
Abstract: this study reports the data recorded from four patients intoxicated with shellfish during the summer 2002, after consuming ribbed mussels (aulacomya ater) with paralytic shellfish toxin contents of 8,066 ± 61.37 mg/100 gr of tissue. data associated with clinical variables and paralytic shellfish toxins analysis in plasma and urine of the intoxicated patients are shown. for this purpose, the evolution of respiratory frequency, arterial blood pressure and heart rate of the poisoned patients were followed and recorded. the clinical treatment to reach a clinically stable condition and return to normal physiological parameters was a combination of hydration with saline solution supplemented with dobutamine (vasoactive drug), furosemide (diuretic) and ranitidine (inhibitor of acid secretion). the physiological condition of patients began to improve after four hours of clinical treatment, and a stable condition was reached between 12 to 24 hours. the hplc-fld analysis showed only the gtx3/gtx2 epimers in the blood and urine samples. also, these epimers were the only paralytic shellfish toxins found in the shellfish extract sample
Endocarditis infecciosa: análisis de 261 casos y resultados del tratamiento con un enfoque multidisciplinario Infective endocarditis: short and long term results in 261 cases managed by a multidiciplinary approach
Sandra Braun J,Alex Escalona P,Gastón Chamorro S,Ramón Corbalán H
Revista médica de Chile , 2000,
Abstract: Background: Early diagnosis, an effective treatment and prompt recognition of complications are essential to improve the prognosis of infective endocarditis (IE) Aim: To report the results of a multidisciplinary approach to diagnosis and management of patients with IE at the Universidad Católica de Chile Hospital. Patients and methods: The clinical history, diagnosis, treatment and outcome of 261 episodes (Duke criteria) of IE admitted between January 1980 and January 1999 were analyzed. These included 185 episodes of native, 73 of prosthetic valve and 3 of nonvalvular IE. Results: Sixty nine percent of patients were men and the mean age was 49 ± 16 years. Seventy five percent had a definite diagnosis of IE (Duke). S. viridans, staphylococci and enterococci together constituted 85% of the isolated bacterial strains. Twenty seven had culture-negative IE, related to a high incidence of antibiotic therapy prior to diagnosis. Transesophageal echocardiography was performed in 102 cases and it detected vegetations in 91% of aortic and 96% of mitral IE, rupture or prosthesis dehiscence in 67% of aortic and 52% of mitral IE and abscesses in 51% of aortic and 15% of mitral IE. Fifty one percent developed heart failure and 34% had embolic events. S. aureus IE was associated to a higher incidence of embolic events, complications which contraindicated surgery and increased mortality rate (27%). Of all patients, 40% were treated exclusively with antibiotics, 52% were operated on and 8% had surgical indication but were nonoperable because of serious complications. The overall mortality was 16.3%: 13% in the medical, 9% in the surgical and 81% in the non-operable groups. The type of treatment and mortality rates did not differ between IE of native valves and prosthetic valves. Long term follow up showed survival rates of 73% at 5 years and 66% at 10 years. Conclusion: A multidisciplinary approach may be very helpful to improve the prognosis of IE. (Rev Méd Chile 2000; 128: 708-20).
Densidad poblacional y estructura de grupo de Ateles hybridus brunneus (Primates: atelidae) en un fragmento de bosque aislado en el suroriente de antioquia, Colombia
Roncancio,Néstor J; García,Lina M; Acosta,Amilvia;
Mastozoolog?-a neotropical , 2010,
Abstract: there was a group of a. h. brunneus in an isolated forest fragment of 21 ha, with a density of 39 individuals/ km2 (95% ci = 21.3-72.9). this is the smallest area where high density is estimated to ateles. the group of a. h. brunneus was composed of nine individuals, being smaller than that recorded in other investigations. ateles has a fission-fusion social system, where groups are divided into subgroups. the average size group of four individuals per subgroup was not different from that reported in other investigations. the ratios male-female and female-immature were 1:0.67 and 1:2 respectively.
Análisis de Tensiones mediante Elementos Finitos de una Válvula Esférica durante la Prueba Hidrostática, y su Verificación Experimental
Gualda,Néstor J; Sanzi,Héctor C; Ortiz,Luis;
Información tecnológica , 2010, DOI: 10.4067/S0718-07642010000500006
Abstract: the stress and deformation analysis in the body of a ball valve of diameter 8", class 600, during the hydrostatic test, using the finite elements method is done. the results are verified through experimental stress analysis method, using strain gauges. for the finite elements method the software cosmos/m and information obtained during the experimental analysis were used. the experimental tests were carried out in a press type test machine, placing strain gauges in the body of the valve at certain points of interest. the valúes of deformation obtained allowed validating the application of the finite elements method.
Densidad poblacional de Saguinus leucopus en remanentes de bosque con diferentes características físicas y biológicas
Roncancio,Néstor J.; Rojas,William; Defler,Thomas;
Mastozoolog?-a neotropical , 2011,
Abstract: saguinus leucopus is an endemic primate of colombia. it has a very small distribution on the andean region of colombia from 0 to 1500 m asl. this is one of the regions where more habitats are lost by human activities. s. leucopus is an endangered species because of its small distribution area and habitat loss. our first goal was to compare the population density of s. leucopus in forest patches of different alteration level. the second goal was to evaluate the relationship between population density and the size, isolation distance, shape and altitude of the patches. the final goal was to evaluate its association with plant diversity, and tree density of the forest patches. population density was estimated using distance sampling with line transect. the population densities were 37 to 149 individual / km2. we found differences between some patches. population densities of s. leucopus in the seven patches were separated into three homogeneous groups. using poisson regression, we found that population density of s. leucopus increases at higher altitudes and when the patch is more elongated. there was not significant association between population density and plant diversity and structure.
NUEVOS REGISTROS DE COCCINELLIDAE PARA EL ESTADO DE MORELOS, MéXICO
A. G. TREJO-LOYO,J. I. NéSTOR ARRIOLA
Acta zoológica mexicana , 2012,
Abstract:
DENSIDAD POBLACIONAL Y ESTRUCTURA DE GRUPO DE Ateles hybridus brunneus (PRIMATES: ATELIDAE) EN UN FRAGMENTO DE BOSQUE AISLADO EN EL SURORIENTE DE ANTIOQUIA, COLOMBIA
Néstor J. Roncancio,Lina M. García,Amilvia Acosta
Mastozoolog?-a neotropical , 2010,
Abstract: Se encontró un grupo de Ateles hybridus brunneus en un fragmento de bosque aislado de 21 ha, con una densidad de 39 individuos/km2 (IC95% = 21.3-72.9). Esta área es la más peque a donde se ha estimado alta densidad para Ateles. El grupo de A. h. brunneus estuvo compuesto por nueve individuos, grupo más peque o que el registrado en otras investigaciones. Ateles tiene un sistema social fisión-fusión, donde los grupos se dividen en subgrupos. El tama o promedio de subgrupo fue de cuatro individuos y no difiere del registrado en otras investigaciones. Las proporciones machos-hembras y hembras- inmaduros fueron 1:0.67 y 1:2 respectivamente.
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