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Search Results: 1 - 10 of 496525 matches for " FABIAN ARMANDO; CORTéS MARíN "
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ESTUDIO PRELIMINAR DEL COMPORTAMIENTO REOLOGICO BAJO COMPRESIóN UNIDIRECCIONAL DE LA PULPA DE PLáTANO (Musa AAB Simmonds)
CIRO VELáSQUEZ,HéCTOR JOSé; MONROY LAITON,FABIAN ARMANDO; CORTéS MARíN,ELKIN ALONSO;
DYNA , 2008,
Abstract: samples of plantain pulp (musa aab simmonds) were subjected to tests of unidirectional compression using an analyzer of texture ta-xt2i. the true flow curves (stress-strain) and rheological properties such as stress, strain and toughness to failure point were evaluated. the material was subjected under two loading direction (longitudinal and transversal) and three positions throughout the longitudinal axis of the product: initial, middle and final. the statistical analyses showed that the product is highly anisotropic, where the direction of load and the position within the material are significant effects in the rheological response of the material.
ESTUDIO PRELIMINAR DEL COMPORTAMIENTO REOLOGICO BAJO COMPRESIóN UNIDIRECCIONAL DE LA PULPA DE PLáTANO (Musa AAB Simmonds)
HéCTOR JOSé CIRO VELáSQUEZ,FABIAN ARMANDO MONROY LAITON,ELKIN ALONSO CORTéS MARíN
DYNA , 2008,
Abstract: Pulpa de plátano Dominico-Hartón fue sometida a ensayos de compresión unidireccional usando un analizador de textura TA-XT2i. Las curvas de flujo y las propiedades reológicas del producto a condición de falla como esfuerzo, deformación y tenacidad fueron determinadas. La pulpa fue sometida a dos direcciones de carga (longitudinal y transversal) en tres posiciones a lo largo del eje longitudinal del producto: inicial, medio y final. Los análisis estadísticos mostraron que el material es altamente anisotrópico, donde la dirección de carga y la posición dentro de la material son efectos significativos en la respuesta reológica del producto.
Deficiencia de hierro en donantes de sangre
Cortés,Armando; Jiménez,Martha Lucía; Fajardo,Adriana; Valencia,Gloria; Marín,Martha Cecilia; Sandoval,Norma;
Colombia Médica , 2005,
Abstract: context: blood donation results in a substantial loss of iron (200 to 250 mg) at each bleeding procedure (425 to 475 ml) and subsequent mobilization of iron from body stores. recent reports have shown that body iron reserves generally are small and iron depletion is more frequent in blood donors than in non-donors. objective: the aim of this study was to evaluate the frequency of iron deficiency in blood donors and to establish the frequency of iron deficiency in blood donors according to sex, whether they were first-time or multi-time donors. design: from march 20 to april 5, 2004, three hundred potential blood donors from hemocentro del café y tolima grande were studied. diagnostic tests: using a combination of biochemical measurements of iron status: serum ferritin (ria, annar) and the hemoglobin pre and post-donation (hemocue vital technology medical). results: the frequency of iron deficiency in potential blood donors was 5%, and blood donors accepted was 5.1%; in blood donors rejected for low hemoglobin the frequency of iron deficiency was 3.7% and accepted blood donors was 1.7% in male and 12.6% in female. the frequency of iron deficiency was higher in multi-time blood donors than in first-time blood donors, but not stadistic significative. increase nivel accepted hemoglobina in 1 g/dl no incidence in male; in female increase of 0.5 g/dl low in 25% blood donors accepted with iron deficiency, but increased rejected innecesary in 16.6% and increased is 1 g/dl low blood donors female accepted in 58% (7/12), but increased the rejected innecesary in 35.6%. conclusions: we conclude that blood donation not is a important factor for iron deficiency in blood donors. the high frequency of blood donors with iron deficiency found in this study suggests a need for a more accurate laboratory trial, as hemoglobin or hematocrit measurement alone is not sufficient for detecting and excluding blood donors with iron deficiency without anemia, and ajustes hacia nivel more high i
Detección de hepatitis B oculta en donantes de bancos sangre, Colombia 2008-2009
Beltrán,Mauricio; Berrío-Pérez,Maritza; Bermúdez,María Isabel; Rey-Benito,Gloria; Camacho,Bernardo; Forero,Patricia; Molina,Gloria Cristina; Fals,Orlando; Pisciotti,Isabel; Oliveros,Yulieth; Cortés,Armando; De La Hoz,Fernando;
Biomédica , 2011,
Abstract: introduction. in colombian blood banks, screening for the surface antigen of hepatitis b is mandatory in all units collected. testing of antibody against core antigens is not administered, although this method may be useful to detect donors infected with the hepatitis b virus. objective. the prevalence of occult hepatitis b was determined by applying a full-serological profile of hepatitis b virus to blood samples of blood donors. materials and methods. between april 2008 and october 2009, a prospective cross sectional study was conducted using 628 samples from donors to blood banks located in four colombian cities. prevalence for hepatitis b had been previously recorded for these cities. serological screening was performed for the complete virus; then nucleic acid amplification was tested in sera that were anti-hb creactive and with a titer of anti-hbs a?¤30 mui/ml. results. of the 628 samples tested, 129 met the serological criteria established to be tested nucleic acid amplification. none of them demonstrated evidence of nucleic acid amplification of hepatitis b virus. conclusions. this is the first study in colombia to detect the presence of blood donors that may be occult hepatitis b carriers. none was detected.
Sobrevida después de transfusión en pacientes del Hospital Universitario del Valle
Cortés,Armando; Botero,María Paula; Llanos,Guillermo;
Colombia Médica , 2005,
Abstract: introduction: no body knows about the survival and the characteristics of transfusion recipients; however, this information is key to evaluate the cost benefit or effectiveness of the measures introduced for improvement the security of the alogenics transfusions. materials and methods: hospital and blood banks records were collected on all patients at university hospital of valle in cali, colombia , from january through december 1997 (12,567 transfusion episodes) and a random sample (1,189 transfusion episodes). all patients were then matched with the national register of deaths in colombia during a three years follow-up. results: the mean patient age was 42 years and the mean transfusion total was 3.2 units by episode. only 17% of the patients was more than 65 years, 69% under the age of 40 years, and 14.%5 under one year. about 57 % were men. all patients, 38.2% were surgical and 62% treated medically. of the 1054 patients whose survival was investigated, 73.7% were alive after one year, 67.3% after two years and 65.5% after three years. survival was lower in those receiving platelets and larger than 10 units. conclusion: the survival of patients transfused in the university hospital of valle differs of estimates of other studies. this difference has implications for the estimations of cost-effectiveness of blood donors screening for infectious disease.
Sobrevida después de transfusión en pacientes del Hospital Universitario del Valle
Armando Cortés,María Paula Botero,Guillermo Llanos
Colombia Médica , 2005,
Abstract: Introduction: No body knows about the survival and the characteristics of transfusion recipients; however, this information is key to evaluate the cost benefit or effectiveness of the measures introduced for improvement the security of the alogenics transfusions. Materials and methods: Hospital and blood banks records were collected on all patients at University Hospital of Valle in Cali, Colombia, from January through December 1997 (12,567 transfusion episodes) and a random sample (1,189 transfusion episodes). All patients were then matched with the national register of deaths in Colombia during a three years follow-up. Results: The mean patient age was 42 years and the mean transfusion total was 3.2 units by episode. Only 17% of the patients was more than 65 years, 69% under the age of 40 years, and 14.%5 under one year. About 57 % were men. All patients, 38.2% were surgical and 62% treated medically. Of the 1054 patients whose survival was investigated, 73.7% were alive after one year, 67.3% after two years and 65.5% after three years. Survival was lower in those receiving platelets and larger than 10 units. Conclusion: The survival of patients transfused in the University Hospital of Valle differs of estimates of other studies. This difference has implications for the estimations of cost-effectiveness of blood donors screening for infectious disease.
Unexpected gallbladder cancer
Cortés Armando,Botero María Paula,Carrascal Edwin,Bustamante Fabio
Colombia Médica , 2004,
Abstract: Background. Gallbladder cancer is a relatively uncommon malignancy in Colombia. To establish the overall rate of gallbladder carcinoma and unexpected gallbladder Study design and methods. We retrospectively evaluate all consecutive cholecystectomies performed in the Fundación Hospital San José de Buga during a 2 year-old period to determine the incidence of carcinoma of the vesicle and to identify retrospectively characteristic common in this particular group of patient. Results. Of the 376 cholecystectomies performed in this hospital during the last two years, the carcinoma of gallbladder was diagnosed in six patients alone in one of them was suspected before the surgery. In accordance with the literature, the occurrence in women (83.3%) was higher than in men (16.7%). The mean age was 58.5 years (range 41±71). Its presentation is similar to that of lithic disease of the gallbladder. The most common symptom is was abdominal pain; the majority (66.7%) had cholelithiasis, and the pathological reports confirm the diagnosis adenocarcinoma in all the six patients. Conclusions. The overall incidence of unsuspected gallbladder carcinoma in our series was 1.6%. We could not find common characteristic for this particular group of patient when compared to patients with no-malignant pathology. Gallbladder cancer was undiagnosed for clinical physician, radiologist, surgeon and pathologist for examination macroscopic specimens.
Concordance between clinical diagnosis and autopsy findings in two periods in the Hospital Universitario del Valle, Cali
Cortés Armando,Botero María Paula,Carrascal Edwin,Daza Yamile
Colombia Médica , 2004,
Abstract: Context: Autopsy rates have declined all over the world recently. Clinical autopsy is considered to be an essential element for medical auditing and teaching and a useful tool for the evaluation of accuracy of the clinical diagnoses. Objetive: We describe the concordance between clinical diagnoses and autopsy findings in a tertiary care center. Materials and methods: We compared the diagnosis recorded on medical charts with reports of 100 autopsies performed between 1970 and 1975, and in 100 autopsies performed between 1990 and 1995 in the department of pathology of a terciary care hospital. The autopsy diagnoses were used as the gold standard . Results: The higher sensivity for diagnosis was observed for neoplasic disease in both period and for hemodinamics disorders, thrombosis and shock in 1970. The clinical diagnosis of the basic cause of death was confirmed at autopsy in 73% and 64% of cases in period 1970 and 1990 respectively. The percent confirmation fell when the immediate terminal cause of death was considered, and in 36.5% of cases, the terminal cause was only diagnosed at autopsy. Of 200 adults patients, 62 (31%) had an infectious disease at autopsy. In 25 (40.3%) of 62 patients, the infectious disease diagnoses were unknown clinically. There are substantial discrepancies between clinical and autopsy diagnoses of infectious disease. The bronchopneumonia is the infectious disease most often missed clinically (24.5%) of the cases, similar in both periods. The discrepancies between clinical and autopsy diagnosis were even larger for secondary diagnoses: 63% of them were not suspected upon clinical diagnosis. The most frequently omitted diagnosis was bronchopneumonia. Iatrogenic injuries were very frequent, and approximately 28% of them were not described in clinical reports. Conclusions: Our results suggest that highly sensitive and specific diagnostic tests are necessary but cannot substitute the clinical practice for the elaboration of correct diagnoses. The possibility that a given autopsy will reveal an important unsuspected diagnosis not has decreased over time, remains sufficiently high encouraging ongoing use of the autopsy.
Determinación de las características del docente asistencial que forma al especialista de Enfermería Materno Infantil: Una propuesta de indicadores
Mur Villar,Norma; Iglesias León,Miriam; Cortés Cortés,Manuel; Aguilar Cordero,María;
MediSur , 2009,
Abstract: backgrounds: the features of the mother and child health nursing specialist?s teaching care training are paramount to form appropriate teaching behaviors. aim: to determine the features of the medical care teacher who trains the mother and child health nursing specialist. methods: an exploratory research was carried out during the years 2008-2009 in the ?gustavo aldereguía lima? general university hospital of cienfuegos, decision theory was applied to select the criteria taken into account in the multicriterial model, by means of a variation of the delphi method. the universe was made up by the coordinators and methodologists who run the mother and child health nursing specialty on a national level, and a non-probabilistic sampling was conducted to obtain the sample (experts sampling). results: 23 criteria exceeding the pc4 cutoff point corresponding to the ?much? category are needed, which links the professional model to the social demands to know, relate and apply the contents of nursing using the material resources that connect the concrete to the abstract to promote the continuity of medical care and the use of the potential of assistance in the training the specialists in which the professional?s behavior was demonstrated. conclusions: by means of the stated criteria, it is evidenced that medical care is the basis for the kind of teaching training our professional needs to organize the teaching process, starting from medical care issues. that training allows them to accomplish their social task as health trainers.
MAGNETIC BEHAVIOR AND ANTIBACTERIAL ACTIVITY OF IRON (III) COMPLEXES
PIEDAD CORTéS-CORTéS,ANA MARíA ATRIA,MARTíN CONTRERAS,OCTAVIO PE?A
Journal of the Chilean Chemical Society , 2008,
Abstract: The preparation, magnetic characterization and antimicrobial properties of the complexes [Fe(3)0(CH3COO)6(CH3COOH)(H(2)0)]Cl(MeImid)-(H(2)0) (1) and [Fe(4)0(2)(CH3COO)(7)0(2)(BPA)2(H(2)0)]- CH.25(CH3CH2OH)(H(2)0) (2), where Melmid is 2-methyl-imidazolium and BPA is 2,2'-bipyridine, are described. The variable temperature susceptibilities of these complexes were investigated in the temperature range 2-300K. The data have been modeled on the assumption of "butterfly" arranged for (2) and equilateral triangle of ferric ions for (1). The antimicrobial activities of these complexes have been screened in vitro against different bacterial strains. The complexes (1) and (2) display activity over Gram negative bacteria and these compounds not present activity over Gram positive strains. These complexes have bacteriostatic effect over bacterial target. The toxicity analyses of iron complexes showed these have cytotoxicity effect to values around the MIC on human cell.
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