Estudio de la cinética del fraguado de cementos P-350 por resonancia magnética nuclear

A kinetic study of cement setting process is presented in this paper A new method which allows the microscopic research of the evolution of the cement hydration applied to the study of three P-350 cuban cements is used. The initial and final values of the specific surfaces of the hydration products and cement were obtained, and the different periods of the hydration process of cement pastes were characterized. The influence of the cement phase composition on the surface development of the hydrated cement stone is discussed.En el presente trabajo se presenta el estudio de la cinética del proceso de fraguado del cemento empleando un método novedoso que permite investigar microscópicamente la evolución de la hidratación del cemento, el cual fue aplicado al estudio de tres cementos cubanos P-350. Se obtuvieron los valores iniciales y finales de las superficies específicas de los productos de hidratación y del cemento. Se caracterizaron los diferentes períodos del proceso de hidratación de las pastas de cemento. Se muestra la influencia de la composición fásica del cemento sobre el desarrollo superficial de la pasta hidratada

Genetic selection for natural disease resistance against brucellosis and foot and mouth disease virus in colombian criollo cattle

IP 2121-12-134-94resistencia natural a las infecciones virales / Albeiro Lopez,Ana E. Arango, Jorge E. Ossa. -- En: Revista;colombiana de ciencias pecuarias. -- Vol. 13, no. 1 (2000); p.37-45. -- ISSN 01200690 -- Caracterizacion de;recursos geneticos autoctonos en Colombia / Olivera AngelM. ...[et al.]'-- en: Revista escuela nacional de;policia general Santander seccional Rafael Reyes. -- No. 3(dic.2001); p.39-40. -- ISSN 0124549X--;Resistencia natural del ganado blanco ojinegro (Bon) a lainfeccion por virus de estomatitis vesicular (Vev) y;rinotraqueitis infecciosa bovina (RIB) / Restrepo S. ... [et al.] -- En: susceptibilidad a los subtipos A24-C;y O1-C de la fiebre aftosa y la capacidad de produccion deIFN,por parte1 (2000); p. 37-45. -- ISSN 01200690;'-- caracterizacion de Recursos geneticos autoctonos en COLombia/ Olivera(BON) / Albeiro Lopez, Ana E.;Arango, Fabio N. Zuluaga, Jose Barrera, Jorge E. Ossa. --En:Iatreia. --Vol. 13, no. 2 (jun. 2000); p.;53-120. -- ISSN 01210793. -- Genotipicacion de la resistencianatural delganado blanco ojinegro (BON) a la;salmonella dublin / Omar A. Saldarriaga, Maria T. Rugeles,JaimeI. Velasquez, Gabriel Bedoya, Gary Adams,;Jorge E. Ossa. -- En: Iatreia. -- vol. 13, no. 2 (jun. 2000);p.53-120. -- ISSN 01210793. -- Caracterizacion;'-- en: Proceedings of the Global Conference On Conservation ofDomestic Animal Genetic Resources (4 : 1998;Aug. 17-21 : Colombia) -- [s.l. : s.n.], 1998 -- p. ; 28 cm. --Ifn mediated restriction of fmdv in bovine;fibroblast / A. Lopez ... [et al.] -- En: International symposium on positive strand RNA visure cm. --;ARTICULO(S) EN REVISTA: Receptores celulares, interferon yapoptosis en laresistencia natural a las;infecciones virales / Albeiro Lopez, Ana E. Arango, JorgeE. Ossa. -- En:Revista colombiana de ciencias;pecuarias. -- Vol. 13 (2000); p. 37-45. -- ISSN 01200690 -'- Biologia molecular y epizootiologia del virus de;la fiebre aftosa / Albeiro Lopez, Ana E. Arango, Jorge E.Ossa.'-- en: Revista colombiana de ciencias;PONENCIAS EN CONGRESO(S): Toward the recovery of criollo cattlein Colombia / M. Olivera Angel. ... [et al.];pecuarias. -- Vol. 13 (2000); p. 37-45. -- ISSN 01200690 -'- Ganado blancoorejinegro (BON): una alternativa;genotipica y fenotipica de la resistencia natural del ganado blanco oreginegro (BON) a la salmonella dublin /;O. A. Saldarriaga, M. T. Rugeles, J. I. Velasquez, G. Bedoya,J.E. Ossa.'-- en: Revista colombiana Ciencias;pecuarias. -- Vol. 12 (sep. 1999); p. 51-52. -- ISSN 01200690--Analisisde resistencia/susceptibilidad al;virus de la fiebre aftosa en el ganado blanco orejinegro (BON)/A. Lopez,... [et al.] -- En: Revista;colombiana ciencias pecuarias. -- Vol. 12 (sep. 1999); p.51-52.-- ISSN 01200690 -- Estructura molecular y;poblacional del ganado criollo Colombiano (GCC) / GabrielBedoya... [et al.] -- En: Revista colombiana;ciencias pecuarias. -- vol. 14, no. 2 (2001); p. 107-125.'-- ISSN 01200690-- Receptores celulares, interferon;y apoptosis en la resistencia natural a las infecciones virales/ AlbeiroLopez, Ana E. Arango, Jorge Ossa. --;para la produccion en Colombia / Albeiro Lopez ... [et al.] --En: Revistacolombiana de ciencias pecuarias.; Vol. 13 (2000 ); p. 37-45. -- ISSN 01200690 -- Receptores celulares, interferon y apoptosis en la;En: Revista colombiana ciencias pecuarias. -- vol. 13, no.1 (2000); p. 14-18. -- ISSN 0120069

Biota Colombiana Volumen 18 No. 1 (2017)

Volumen 18 Número 1 de la revista Biota ColombianaBogotá, Colombi

Neurological Adverse Effects Attributable to β-Lactam Antibiotics: A Literature Review

International audienc

Higher Fluid Balance Increases the Risk of Death from Sepsis: Results from a Large International Audit∗

Objectives: Excessive fluid therapy in patients with sepsis may be associated with risks that outweigh any benefit. We investigated the possible influence of early fluid balance on outcome in a large international database of ICU patients with sepsis. Design: Observational cohort study. Setting: Seven hundred and thirty ICUs in 84 countries. Patients: All adult patients admitted between May 8 and May 18, 2012, except admissions for routine postoperative surveillance. For this analysis, we included only the 1,808 patients with an admission diagnosis of sepsis. Patients were stratified according to quartiles of cumulative fluid balance 24 hours and 3 days after ICU admission. Measurements and Main Results: ICU and hospital mortality rates were 27.6% and 37.3%, respectively. The cumulative fluid balance increased from 1,217 mL (-90 to 2,783 mL) in the first 24 hours after ICU admission to 1,794 mL (-951 to 5,108 mL) on day 3 and decreased thereafter. The cumulative fluid intake was similar in survivors and nonsurvivors, but fluid balance was less positive in survivors because of higher fluid output in these patients. Fluid balances became negative after the third ICU day in survivors but remained positive in nonsurvivors. After adjustment for possible confounders in multivariable analysis, the 24-hour cumulative fluid balance was not associated with an increased hazard of 28-day in-hospital death. However, there was a stepwise increase in the hazard of death with higher quartiles of 3-day cumulative fluid balance in the whole population and after stratification according to the presence of septic shock. Conclusions: In this large cohort of patients with sepsis, higher cumulative fluid balance at day 3 but not in the first 24 hours after ICU admission was independently associated with an increase in the hazard of death