Jorge Calderón - Academia.edu (original) (raw)
Papers by Jorge Calderón
Revista Peruana de Ginecología y Obstetricia, 2015
Objetivo: Evaluar la prevalencia de vaginosis bacteriana en una población predominantemente rural... more Objetivo: Evaluar la prevalencia de vaginosis bacteriana en una población predominantemente rural (Quilmaná- Cañete). Diseño: Estudio prospectivo, transversal y analítico. Material y Métodos: Se tomó muestras vaginales de 100 pacientes que acudieron por presentar flujo vaginal, procediéndose al análisis microbiológico y aplicación de los criterios de Amsel. Resultados: Se encontró vaginosis bacteriana en 33% de pacientes que cumplían por lo menos 3 de los 4 criterios de Amsel para el diagnóstico respectivo; candidiasis en 15% , tricomoniasis en 4% y mixto en 5%. La presencia de células clave y la prueba de aminas nos permitió identificar al mayor porcentaje de las pacientes con vaginosis bacteriana; así mismo, la sola presencia de células clave, células clave + olor y olor + pH tienen alto valor predictivo positivo y negativo. La sensibilidad del flujo vaginal es baja. Conclusiones: La vaginosis bacteriana es el tipo de infección vaginal más común entre las mujeres en edad reproduct...
Portal de la Ciencia
En Honduras existe una gran diversidad de especies forestales de alto valor económico las cuales ... more En Honduras existe una gran diversidad de especies forestales de alto valor económico las cuales son apetecidas en el mercado local e internacional. Dentro de los predios del Centro Universitario Regional del Litoral Atlántico - CURLA (216 ha) se desconoce la cantidad de individuos por especie que entran en la clasificación de tradicionales y potenciales según su valoración económica en el mercado. Esto resulta en un control irracional de árboles aprovechados desconociendo su respectivo volumen, pie tablar, ubicación exacta y valor monetario. En este sentido se define como objetivo de investigación el recopilar y cuantificar el valor monetario de los datos del inventario de las especies forestales de alto valor comercial ubicadas en el CURLA, en los sectores del 1-8 de la Etapa I en el año 2018. La novedad de este trabajo reside en la cuantificación y georreferenciación de cada individuo por especie, creando una tabla de atributos con sus datos de crecimiento pertinentes como son el...
Batteries
All-solid-state batteries (ASSBs) are a promising response to the need for safety and high energy... more All-solid-state batteries (ASSBs) are a promising response to the need for safety and high energy density of large-scale energy storage systems in challenging applications such as electric vehicles and grid integration. ASSBs based on sulfide solid electrolytes (SEs) have attracted much attention because of their high ionic conductivity and wide electrochemical windows of the sulfide SEs. Here, we study the electrochemical performance of ASSBs using composite electrodes prepared via two processes (simple mixture and solution processes) and varying the ionic conductor additive (80Li2S∙20P2S5 and argyrodite-type Li6PS5Cl). The composite electrodes consist of lithium-silicate-coated LiNi1/3Mn1/3Co1/3O2 (NMC), a sulfide SE, and carbon additives. The charge-transfer resistance at the interface of the solid electrolyte and NMC is the main parameter related to the ASSB’s status. This value decreases when the composite electrodes are prepared via a solution process. The lithium silicate coa...
Trajectoires et dérives de la littérature-monde
Anuario Colombiano de Historia Social y de la Cultura
A partir de un pleito por tierras entre los habitantes del asiento de libres de Quilichao en la g... more A partir de un pleito por tierras entre los habitantes del asiento de libres de Quilichao en la gobernación de Popayán y el hacendado y minero Francisco Arboleda, pretendemos mostrar cómo los apoderados de los vecinos buscaron que las autoridades locales materializaran ciertos privilegios que la corona les había adjudicado, mediante requerimientos que dejaron la huella de sus razonamientos, presunciones, expectativas y, sobre todo, del uso de un lenguaje particular que potenciaba sus exigencias jurídicas. Se constata en los documentos la eclosión de una narrativa ilustrada que buscaba aumentar privilegios y arropaba las peticiones con conceptos y palabras como Estado y causa pública e ideales ilustrados de fortalecimiento de la fe católica y la productividad agrícola.
Journal of cosmetic dermatology, Jan 24, 2018
Moisturizer is an important component of many cosmetic products. It helps to maintain the skin... more Moisturizer is an important component of many cosmetic products. It helps to maintain the skin's integrity and its barrier functions. Recently, magnetic masks that seek to improve the properties of the skin have been developed and have become a new cosmetic trend. However, scientific proof of their stated properties is lacking. To test whether iron oxide contained in a face mask with magnetic properties in an oily matrix with a freeze-dried aloe-vera base increases moisturization of the skin and improves skin barrier function. Formulations were prepared containing an oil phase (67.3% wt.) and a solid phase (32.7% wt.). The moisturizing properties of the mask were tested by measuring in vivo electrochemical impedance spectroscopy, contact angle, and visual appearance. Meanwhile, human panel tests were performed to evaluate the sensory perception of potential users. The moisturizing effect of the iron oxide mask is clearly superior to that of the other tested samples. Water retent...
Psychiatry research, Jan 16, 2018
HIV-associated neurocognitive disorders (HAND) include asymptomatic neurocognitive impairment (AN... more HIV-associated neurocognitive disorders (HAND) include asymptomatic neurocognitive impairment (ANI), mild neurocognitive disorder (MND) and HIV-associated dementia. Early recognition of HAND is crucial, and usually requires thorough neuropsychological testing. Neurological soft signs (NSS), i.e. minor motor and sensory changes, a common feature in severe psychiatric disorders, may facilitate early diagnosis. NSS were examined using the Heidelberg NSS Scale in 18 patients with ANI, 21 with MND, 28 HIV positive patients without HAND, and 39 healthy controls matched for age, gender, and education. The highest NSS scores were obtained in the MND patients (13.3 ± 10.0, p < 0.0001) followed by those with ANI (11.7 ± 10.6), the HIV positive subjects without neurocognitive deficits (8.0 ± 4.1) and the healthy controls (3.8 ± 3.2). This result was confirmed when age and years of school education were entered as covariates. No significant correlations between NSS and CD4 counts or any othe...
Diálogos Revista Electrónica, 2016
Este trabajo presenta las categorías ocupacionales definidas en los primeros censos republicanos ... more Este trabajo presenta las categorías ocupacionales definidas en los primeros censos republicanos ordenados en Colombia. Para el caso se estudian solo las cifras arrojadas por los censos en la provincia de Cartagena. Se intenta una aproximación a la evolución demográfica dedicando principal atención a la conformación de la estructura socio-productiva. Para su análisis se dividió la provincia de Cartagena en dos espacios: uno de corte urbano y otro rural. El primero corresponde al cantón de Cartagena ubicado en la parte norte de la provincia y el segundo al cantón del Chinú localizado al sur. Se trata de señalar como el norte provincial tuvo unas características urbanas que llevaron a enfocar sus actividades productivas en actividades de carácter local, comarcal e internacional, con fuerte concentración de la burocracia estatal y la producción artesanal; mientras en el sur se produjo una expansión agrícola acompañada de crecimiento demográfico y una variedad de actividades productivas...
Revista Historia Caribe, Jul 9, 2014
Este artículo forma parte del proyecto "Estado, ley y ciudadanía en Colombia, siglos XIX y XX", q... more Este artículo forma parte del proyecto "Estado, ley y ciudadanía en Colombia, siglos XIX y XX", que cuenta con el apoyo institucional de la Universidad del Atlántico (Colombia). Esta publicación está bajo una licencia Creative Commons Reconocimiento-Compartir Igual 3.0 La conversión de milicianos y guerrilleros en ciudadanos armados de la República de Colombia Resumen Este artículo examina los tratados de guerrilla, manuales, ordenanzas y reglamentos militares que eran leídos y cumplidos por soldados, milicianos, guerrilleros, oficiales y los ciudadanos armados, todos ellos enfrentados al dilema de la guerra o al de lograr una paz estable y permanente en el territorio de la República de Colombia en los inicios del siglo XIX. El enfoque central está dirigido a los ciudadanos armados quienes, luego de pertenecer a varios cuerpos (milicias, guerrillas, guardias nacionales) terminaron incorporados en una fuerza militar única: el ejército libertador, el cual jugó un papel decisivo en la construcción del Estado y en la expansión de la ciudadanía reafirmando así una concepción netamente liberal de la sociedad local de la época.
Gulf Research Reports, 1995
A preliminary study on the interaction between the parasitic barnacle Loxothylacus texanus and tw... more A preliminary study on the interaction between the parasitic barnacle Loxothylacus texanus and two of its host species, the blue crab Callinectes sapidus and the dark blue crab C. rathbunae, in the Gulf of Mexico ispresented.Datawereobtainedfrom923crabs, 162C.sapidusand761 C.rathbunae,depositedintheColecci6n de Crusticeos, Instituto de Biologia, Universidad Nacional Autbnoma de M6xico (UNAM), that were collected in 14 coastal lagoons and sites along the Mexican coast of the Gulf of Mexico. The distribution of L. texanus parasitizing each one of the host species, mean host size variation, distribution of number of parasite externae per host, and morphological modifications of the abdomen of the hosts are analyzed.
Este artículo analiza la metamorfosis de república y republicanismo en Colombia, a partir de su c... more Este artículo analiza la metamorfosis de república y republicanismo en Colombia, a partir de su conceptualización y diversas connotaciones entre 1810 y 1828. Un período de transición política lleno de experiencias constitucionales y proclamaciones de libertad con las cuales se buscaba fijar una forma de gobierno estable. palabras clave República, republicanismo, credo constitucional, libertad política, liberalismo abstRaC This article examines the changes of the republic and republicanism in Colombia, from its conceptualization and different connotations between 1810 and 1828. A full transition policy to constitutional experiences and proclamations of liberty which sought to set a stable polity.
Started in 1997, the VLIR-UOS programme for Institutional University Cooperation (IUC) is an inte... more Started in 1997, the VLIR-UOS programme for Institutional University Cooperation (IUC) is an interuniversity cooperation programme of the Flemish universities. Based on a system of programme funding provided by the Belgian Government, the IUC programme is directed at a limited number of carefully selected partner universities in the South. Each partnership, covering a period of maximum ten years, consists of a coherent set of interventions geared towards the development of the teaching, research and service provision of the partner university, as well as its institutional management. In 2007 VLIR-UOS launched an open call inviting the Flemish universities to submit pro-posals for new IUC partnerships. This resulted in the pre-selection of the University of Limpopo [South Africa] and the Universidad Nacional Agraria la Molina (Peru). Among others, the IUC partner university selection process calls for an ex-ante evaluation of the pre-selected partner universities. This evaluation tak...
Depressive symptoms among patients with acute myocardial infarction. Relationship with revascular... more Depressive symptoms among patients with acute myocardial infarction. Relationship with revascularization therapy Background: Persistence of depressive symptoms after myocardial infarction (MI) is associated with an adverse outcome. The relationship between depression and Invasive Revascularization Therapy (IRT) is not yet fully understood. Aim: To compare the frequency of depressive symptoms and other psychosocial variables among patients with MI, undergoing or not undergoing IRT. Material and Methods: Prospective evaluation of 45 patients aged 58 ± 11 years (87% males) with a diagnosis of MI (Killip I and II). On admission to hospital and at follow up 3 months after discharge, all patients completed the Beck Depression Inventory (BDI), the Zung Anxiety Inventory (ASI), and the Medical Outcomes Study (MOS) social support survey. Depressive symptoms were considered to be present if the BDI score was over 10. Results: Thirty seven percent were hypertensive, 15% diabetic and 44% smokers. Sixty four percent of patients underwent IRT (11.1% revascularization surgery and 53.3% coronary angioplasty). Forty four percent of patients scored over 10 in the BDI at baseline assessment and 26.5% at 3 months follow-up (p < 0.01). At baseline BDI score was 10.2 ± 5.1 and 9.1 ± 4.4 among patients subjected or not subjected to IRT, respectively (NS). The figures at 3 months of follow up were 9.9 ± 5.6 and 4.1 ± 2.5, respectively (p < 0,01). At baseline and three months BDI, anxiety and perceived social support were significantly correlated. Conclusions: Depressive symptoms were frequent after MI in this group of patients, and decreased at follow up only among patients not subjected to IRT.
Revista Facultad de Ingeniería
The analysis of the transients of the Open Circuit Potential (OCP) constitutes a useful tool for ... more The analysis of the transients of the Open Circuit Potential (OCP) constitutes a useful tool for the understanding of the dissolution processes of a metal. Nevertheless, its usefulness depends on a previous knowledge of the system metal/media in study. In this work, the evolution of the OCP of cobalt immersed in a carbonate/bicarbonate solution was analyzed by means of a rotatory disc electrode (RDE); the effect of mass transport, and the reactions that can explain the dissolution of the metal in this media were considered. It was observed that the time necessary to reach the stationary value of the OCP is a function of the mass transport. Also, the OCP evolves towards more positive values as the rotation of the electrode is increased. It was confirmed that the corrosion process of the metal is controlled initially by oxygen reduction (cathodic reaction). However, after some time of exposure, i.e. the necessary for the first corrosion products to appear, the formation of a non-pas...
Lupus, 2014
Objective Our aim was to assess the contribution of depression to cognitive impairment in patient... more Objective Our aim was to assess the contribution of depression to cognitive impairment in patients with systemic lupus erythematosus (SLE). Methods Clinical features, education, age, and Hospital Anxiety and Depression Scale (HADS) were evaluated in 82 patients with SLE and 22 healthy controls, all Chilean women. The Cambridge Neuropsychological Test Automated Battery (CANTAB eclipseTM) assessing attention, spatial memory, and learning and executive function domains was applied. Cognitive deficit definition: a cut-off for definite impairment was defined as a score below -2 standard deviations in at least one outcome measure in two or more domains. ANCOVA with stepwise selection evaluated influences of health status (SLE or control), age, education, and HADS depression and anxiety scores on cognitive outcomes. To avoid overfitting, a shrinkage method was performed. Also, adjusted p-values for multiple comparisons were obtained. Results Cognitive deficit affected 16 (20%) patients, an...
Nitrogen Fixation: From Molecules to Crop Productivity, 2000
... A. Calderón-Flores; J. Calderón; G. Du Pont, S. Durán Departamento de Biotecnología, Institut... more ... A. Calderón-Flores; J. Calderón; G. Du Pont, S. Durán Departamento de Biotecnología, Instituto de Investigaciones Biomédicas, UNAM, México 04510 DF ... ppGpp following amino acid starvation but Sinorhizobiwn meliloti 41 strain does not (B. Belitsky, B. Kary, 1982), following ...
Revista médica de Chile, 2010
Persistence of depressive symptoms after myocardial infarction (MI) is associated with an adverse... more Persistence of depressive symptoms after myocardial infarction (MI) is associated with an adverse outcome. The relationship between depression and Invasive Revascularization Therapy (IRT) is not yet fully understood. To compare the frequency of depressive symptoms and other psychosocial variables among patients with MI, undergoing or not undergoing IRT. Prospective evaluation of 45 patients aged 58 +/- 11 years (87% males) with a diagnosis of MI (Killip I and II). On admission to hospital and at follow up 3 months after discharge, all patients completed the Beck Depression Inventory (BDI), the Zung Anxiety Inventory (ASI), and the Medical Outcomes Study (MOS) social support survey. Depressive symptoms were considered to be present if the BDI score was over 10. Thirty seven percent were hypertensive, 15% diabetic and 44% smokers. Sixty four percent of patients underwent IRT (11.1% revascularization surgery and 53.3% coronary angioplasty). Forty four percent of patients scored over 10...
Ecancermedicalscience, 2014
Emotional distress (ED) is greater for oncology patients in comparison with the general populatio... more Emotional distress (ED) is greater for oncology patients in comparison with the general population, and this has implications for the quality of life of the patient and his/her family, adherence to the treatment, and eventually, survivorship. In general, the detection of these symptoms is low, which explains the need for detection systems appropriate to the clinical reality of the oncology team. The objective of this study is to evaluate for the first time the usefulness of an ultra-brief screening instrument [distress thermometer (DT)], in a group of Chilean oncology patients. A total of 166 outpatients were evaluated at the Cancer Center of the Pontificia Universidad Católica de Chile, before starting chemotherapy. Two screening instruments were applied: Hospital Anxiety and Depression Scale (HADS) and DT. The application of HADS resulted in a prevalence of 32.7% of anxiety symptoms (HADS-A ≥ 8), 15.7% of depression symptoms (HADS-D ≥ 8), and 39.8% had a total score of HADS-T ≥ 11...
Revista Peruana de Ginecología y Obstetricia, 2015
Objetivo: Evaluar la prevalencia de vaginosis bacteriana en una población predominantemente rural... more Objetivo: Evaluar la prevalencia de vaginosis bacteriana en una población predominantemente rural (Quilmaná- Cañete). Diseño: Estudio prospectivo, transversal y analítico. Material y Métodos: Se tomó muestras vaginales de 100 pacientes que acudieron por presentar flujo vaginal, procediéndose al análisis microbiológico y aplicación de los criterios de Amsel. Resultados: Se encontró vaginosis bacteriana en 33% de pacientes que cumplían por lo menos 3 de los 4 criterios de Amsel para el diagnóstico respectivo; candidiasis en 15% , tricomoniasis en 4% y mixto en 5%. La presencia de células clave y la prueba de aminas nos permitió identificar al mayor porcentaje de las pacientes con vaginosis bacteriana; así mismo, la sola presencia de células clave, células clave + olor y olor + pH tienen alto valor predictivo positivo y negativo. La sensibilidad del flujo vaginal es baja. Conclusiones: La vaginosis bacteriana es el tipo de infección vaginal más común entre las mujeres en edad reproduct...
Portal de la Ciencia
En Honduras existe una gran diversidad de especies forestales de alto valor económico las cuales ... more En Honduras existe una gran diversidad de especies forestales de alto valor económico las cuales son apetecidas en el mercado local e internacional. Dentro de los predios del Centro Universitario Regional del Litoral Atlántico - CURLA (216 ha) se desconoce la cantidad de individuos por especie que entran en la clasificación de tradicionales y potenciales según su valoración económica en el mercado. Esto resulta en un control irracional de árboles aprovechados desconociendo su respectivo volumen, pie tablar, ubicación exacta y valor monetario. En este sentido se define como objetivo de investigación el recopilar y cuantificar el valor monetario de los datos del inventario de las especies forestales de alto valor comercial ubicadas en el CURLA, en los sectores del 1-8 de la Etapa I en el año 2018. La novedad de este trabajo reside en la cuantificación y georreferenciación de cada individuo por especie, creando una tabla de atributos con sus datos de crecimiento pertinentes como son el...
Batteries
All-solid-state batteries (ASSBs) are a promising response to the need for safety and high energy... more All-solid-state batteries (ASSBs) are a promising response to the need for safety and high energy density of large-scale energy storage systems in challenging applications such as electric vehicles and grid integration. ASSBs based on sulfide solid electrolytes (SEs) have attracted much attention because of their high ionic conductivity and wide electrochemical windows of the sulfide SEs. Here, we study the electrochemical performance of ASSBs using composite electrodes prepared via two processes (simple mixture and solution processes) and varying the ionic conductor additive (80Li2S∙20P2S5 and argyrodite-type Li6PS5Cl). The composite electrodes consist of lithium-silicate-coated LiNi1/3Mn1/3Co1/3O2 (NMC), a sulfide SE, and carbon additives. The charge-transfer resistance at the interface of the solid electrolyte and NMC is the main parameter related to the ASSB’s status. This value decreases when the composite electrodes are prepared via a solution process. The lithium silicate coa...
Trajectoires et dérives de la littérature-monde
Anuario Colombiano de Historia Social y de la Cultura
A partir de un pleito por tierras entre los habitantes del asiento de libres de Quilichao en la g... more A partir de un pleito por tierras entre los habitantes del asiento de libres de Quilichao en la gobernación de Popayán y el hacendado y minero Francisco Arboleda, pretendemos mostrar cómo los apoderados de los vecinos buscaron que las autoridades locales materializaran ciertos privilegios que la corona les había adjudicado, mediante requerimientos que dejaron la huella de sus razonamientos, presunciones, expectativas y, sobre todo, del uso de un lenguaje particular que potenciaba sus exigencias jurídicas. Se constata en los documentos la eclosión de una narrativa ilustrada que buscaba aumentar privilegios y arropaba las peticiones con conceptos y palabras como Estado y causa pública e ideales ilustrados de fortalecimiento de la fe católica y la productividad agrícola.
Journal of cosmetic dermatology, Jan 24, 2018
Moisturizer is an important component of many cosmetic products. It helps to maintain the skin... more Moisturizer is an important component of many cosmetic products. It helps to maintain the skin's integrity and its barrier functions. Recently, magnetic masks that seek to improve the properties of the skin have been developed and have become a new cosmetic trend. However, scientific proof of their stated properties is lacking. To test whether iron oxide contained in a face mask with magnetic properties in an oily matrix with a freeze-dried aloe-vera base increases moisturization of the skin and improves skin barrier function. Formulations were prepared containing an oil phase (67.3% wt.) and a solid phase (32.7% wt.). The moisturizing properties of the mask were tested by measuring in vivo electrochemical impedance spectroscopy, contact angle, and visual appearance. Meanwhile, human panel tests were performed to evaluate the sensory perception of potential users. The moisturizing effect of the iron oxide mask is clearly superior to that of the other tested samples. Water retent...
Psychiatry research, Jan 16, 2018
HIV-associated neurocognitive disorders (HAND) include asymptomatic neurocognitive impairment (AN... more HIV-associated neurocognitive disorders (HAND) include asymptomatic neurocognitive impairment (ANI), mild neurocognitive disorder (MND) and HIV-associated dementia. Early recognition of HAND is crucial, and usually requires thorough neuropsychological testing. Neurological soft signs (NSS), i.e. minor motor and sensory changes, a common feature in severe psychiatric disorders, may facilitate early diagnosis. NSS were examined using the Heidelberg NSS Scale in 18 patients with ANI, 21 with MND, 28 HIV positive patients without HAND, and 39 healthy controls matched for age, gender, and education. The highest NSS scores were obtained in the MND patients (13.3 ± 10.0, p < 0.0001) followed by those with ANI (11.7 ± 10.6), the HIV positive subjects without neurocognitive deficits (8.0 ± 4.1) and the healthy controls (3.8 ± 3.2). This result was confirmed when age and years of school education were entered as covariates. No significant correlations between NSS and CD4 counts or any othe...
Diálogos Revista Electrónica, 2016
Este trabajo presenta las categorías ocupacionales definidas en los primeros censos republicanos ... more Este trabajo presenta las categorías ocupacionales definidas en los primeros censos republicanos ordenados en Colombia. Para el caso se estudian solo las cifras arrojadas por los censos en la provincia de Cartagena. Se intenta una aproximación a la evolución demográfica dedicando principal atención a la conformación de la estructura socio-productiva. Para su análisis se dividió la provincia de Cartagena en dos espacios: uno de corte urbano y otro rural. El primero corresponde al cantón de Cartagena ubicado en la parte norte de la provincia y el segundo al cantón del Chinú localizado al sur. Se trata de señalar como el norte provincial tuvo unas características urbanas que llevaron a enfocar sus actividades productivas en actividades de carácter local, comarcal e internacional, con fuerte concentración de la burocracia estatal y la producción artesanal; mientras en el sur se produjo una expansión agrícola acompañada de crecimiento demográfico y una variedad de actividades productivas...
Revista Historia Caribe, Jul 9, 2014
Este artículo forma parte del proyecto "Estado, ley y ciudadanía en Colombia, siglos XIX y XX", q... more Este artículo forma parte del proyecto "Estado, ley y ciudadanía en Colombia, siglos XIX y XX", que cuenta con el apoyo institucional de la Universidad del Atlántico (Colombia). Esta publicación está bajo una licencia Creative Commons Reconocimiento-Compartir Igual 3.0 La conversión de milicianos y guerrilleros en ciudadanos armados de la República de Colombia Resumen Este artículo examina los tratados de guerrilla, manuales, ordenanzas y reglamentos militares que eran leídos y cumplidos por soldados, milicianos, guerrilleros, oficiales y los ciudadanos armados, todos ellos enfrentados al dilema de la guerra o al de lograr una paz estable y permanente en el territorio de la República de Colombia en los inicios del siglo XIX. El enfoque central está dirigido a los ciudadanos armados quienes, luego de pertenecer a varios cuerpos (milicias, guerrillas, guardias nacionales) terminaron incorporados en una fuerza militar única: el ejército libertador, el cual jugó un papel decisivo en la construcción del Estado y en la expansión de la ciudadanía reafirmando así una concepción netamente liberal de la sociedad local de la época.
Gulf Research Reports, 1995
A preliminary study on the interaction between the parasitic barnacle Loxothylacus texanus and tw... more A preliminary study on the interaction between the parasitic barnacle Loxothylacus texanus and two of its host species, the blue crab Callinectes sapidus and the dark blue crab C. rathbunae, in the Gulf of Mexico ispresented.Datawereobtainedfrom923crabs, 162C.sapidusand761 C.rathbunae,depositedintheColecci6n de Crusticeos, Instituto de Biologia, Universidad Nacional Autbnoma de M6xico (UNAM), that were collected in 14 coastal lagoons and sites along the Mexican coast of the Gulf of Mexico. The distribution of L. texanus parasitizing each one of the host species, mean host size variation, distribution of number of parasite externae per host, and morphological modifications of the abdomen of the hosts are analyzed.
Este artículo analiza la metamorfosis de república y republicanismo en Colombia, a partir de su c... more Este artículo analiza la metamorfosis de república y republicanismo en Colombia, a partir de su conceptualización y diversas connotaciones entre 1810 y 1828. Un período de transición política lleno de experiencias constitucionales y proclamaciones de libertad con las cuales se buscaba fijar una forma de gobierno estable. palabras clave República, republicanismo, credo constitucional, libertad política, liberalismo abstRaC This article examines the changes of the republic and republicanism in Colombia, from its conceptualization and different connotations between 1810 and 1828. A full transition policy to constitutional experiences and proclamations of liberty which sought to set a stable polity.
Started in 1997, the VLIR-UOS programme for Institutional University Cooperation (IUC) is an inte... more Started in 1997, the VLIR-UOS programme for Institutional University Cooperation (IUC) is an interuniversity cooperation programme of the Flemish universities. Based on a system of programme funding provided by the Belgian Government, the IUC programme is directed at a limited number of carefully selected partner universities in the South. Each partnership, covering a period of maximum ten years, consists of a coherent set of interventions geared towards the development of the teaching, research and service provision of the partner university, as well as its institutional management. In 2007 VLIR-UOS launched an open call inviting the Flemish universities to submit pro-posals for new IUC partnerships. This resulted in the pre-selection of the University of Limpopo [South Africa] and the Universidad Nacional Agraria la Molina (Peru). Among others, the IUC partner university selection process calls for an ex-ante evaluation of the pre-selected partner universities. This evaluation tak...
Depressive symptoms among patients with acute myocardial infarction. Relationship with revascular... more Depressive symptoms among patients with acute myocardial infarction. Relationship with revascularization therapy Background: Persistence of depressive symptoms after myocardial infarction (MI) is associated with an adverse outcome. The relationship between depression and Invasive Revascularization Therapy (IRT) is not yet fully understood. Aim: To compare the frequency of depressive symptoms and other psychosocial variables among patients with MI, undergoing or not undergoing IRT. Material and Methods: Prospective evaluation of 45 patients aged 58 ± 11 years (87% males) with a diagnosis of MI (Killip I and II). On admission to hospital and at follow up 3 months after discharge, all patients completed the Beck Depression Inventory (BDI), the Zung Anxiety Inventory (ASI), and the Medical Outcomes Study (MOS) social support survey. Depressive symptoms were considered to be present if the BDI score was over 10. Results: Thirty seven percent were hypertensive, 15% diabetic and 44% smokers. Sixty four percent of patients underwent IRT (11.1% revascularization surgery and 53.3% coronary angioplasty). Forty four percent of patients scored over 10 in the BDI at baseline assessment and 26.5% at 3 months follow-up (p < 0.01). At baseline BDI score was 10.2 ± 5.1 and 9.1 ± 4.4 among patients subjected or not subjected to IRT, respectively (NS). The figures at 3 months of follow up were 9.9 ± 5.6 and 4.1 ± 2.5, respectively (p < 0,01). At baseline and three months BDI, anxiety and perceived social support were significantly correlated. Conclusions: Depressive symptoms were frequent after MI in this group of patients, and decreased at follow up only among patients not subjected to IRT.
Revista Facultad de Ingeniería
The analysis of the transients of the Open Circuit Potential (OCP) constitutes a useful tool for ... more The analysis of the transients of the Open Circuit Potential (OCP) constitutes a useful tool for the understanding of the dissolution processes of a metal. Nevertheless, its usefulness depends on a previous knowledge of the system metal/media in study. In this work, the evolution of the OCP of cobalt immersed in a carbonate/bicarbonate solution was analyzed by means of a rotatory disc electrode (RDE); the effect of mass transport, and the reactions that can explain the dissolution of the metal in this media were considered. It was observed that the time necessary to reach the stationary value of the OCP is a function of the mass transport. Also, the OCP evolves towards more positive values as the rotation of the electrode is increased. It was confirmed that the corrosion process of the metal is controlled initially by oxygen reduction (cathodic reaction). However, after some time of exposure, i.e. the necessary for the first corrosion products to appear, the formation of a non-pas...
Lupus, 2014
Objective Our aim was to assess the contribution of depression to cognitive impairment in patient... more Objective Our aim was to assess the contribution of depression to cognitive impairment in patients with systemic lupus erythematosus (SLE). Methods Clinical features, education, age, and Hospital Anxiety and Depression Scale (HADS) were evaluated in 82 patients with SLE and 22 healthy controls, all Chilean women. The Cambridge Neuropsychological Test Automated Battery (CANTAB eclipseTM) assessing attention, spatial memory, and learning and executive function domains was applied. Cognitive deficit definition: a cut-off for definite impairment was defined as a score below -2 standard deviations in at least one outcome measure in two or more domains. ANCOVA with stepwise selection evaluated influences of health status (SLE or control), age, education, and HADS depression and anxiety scores on cognitive outcomes. To avoid overfitting, a shrinkage method was performed. Also, adjusted p-values for multiple comparisons were obtained. Results Cognitive deficit affected 16 (20%) patients, an...
Nitrogen Fixation: From Molecules to Crop Productivity, 2000
... A. Calderón-Flores; J. Calderón; G. Du Pont, S. Durán Departamento de Biotecnología, Institut... more ... A. Calderón-Flores; J. Calderón; G. Du Pont, S. Durán Departamento de Biotecnología, Instituto de Investigaciones Biomédicas, UNAM, México 04510 DF ... ppGpp following amino acid starvation but Sinorhizobiwn meliloti 41 strain does not (B. Belitsky, B. Kary, 1982), following ...
Revista médica de Chile, 2010
Persistence of depressive symptoms after myocardial infarction (MI) is associated with an adverse... more Persistence of depressive symptoms after myocardial infarction (MI) is associated with an adverse outcome. The relationship between depression and Invasive Revascularization Therapy (IRT) is not yet fully understood. To compare the frequency of depressive symptoms and other psychosocial variables among patients with MI, undergoing or not undergoing IRT. Prospective evaluation of 45 patients aged 58 +/- 11 years (87% males) with a diagnosis of MI (Killip I and II). On admission to hospital and at follow up 3 months after discharge, all patients completed the Beck Depression Inventory (BDI), the Zung Anxiety Inventory (ASI), and the Medical Outcomes Study (MOS) social support survey. Depressive symptoms were considered to be present if the BDI score was over 10. Thirty seven percent were hypertensive, 15% diabetic and 44% smokers. Sixty four percent of patients underwent IRT (11.1% revascularization surgery and 53.3% coronary angioplasty). Forty four percent of patients scored over 10...
Ecancermedicalscience, 2014
Emotional distress (ED) is greater for oncology patients in comparison with the general populatio... more Emotional distress (ED) is greater for oncology patients in comparison with the general population, and this has implications for the quality of life of the patient and his/her family, adherence to the treatment, and eventually, survivorship. In general, the detection of these symptoms is low, which explains the need for detection systems appropriate to the clinical reality of the oncology team. The objective of this study is to evaluate for the first time the usefulness of an ultra-brief screening instrument [distress thermometer (DT)], in a group of Chilean oncology patients. A total of 166 outpatients were evaluated at the Cancer Center of the Pontificia Universidad Católica de Chile, before starting chemotherapy. Two screening instruments were applied: Hospital Anxiety and Depression Scale (HADS) and DT. The application of HADS resulted in a prevalence of 32.7% of anxiety symptoms (HADS-A ≥ 8), 15.7% of depression symptoms (HADS-D ≥ 8), and 39.8% had a total score of HADS-T ≥ 11...