En busca del mural de Camilo Egas en la Feria Mundial de 1939 (Debates)

El artículo aborda el mural que el artista plástico ecuatoriano Camilo Egas preparó para el pabellón del Ecuador en la Feria Mundial de Nueva York, de 1939. Se revisan los detalles relacionados con la confección de la obra encargada por el Gobierno ecuatoriano y las reacciones que suscitó entre los asistentes a la exposición, funcionarios diplomáticos ecuatorianos y otras personalidades gubernamentales. Además, se describen algunos aspectos relacionados con su abandono, una vez concluida la exhibición y con la tarea de identificación de la documentación que testimonia el caso.

El Caso Texaco y la construcción de la memoria

La intención del presente trabajo, es analizar a través de cuatro actores distintos: ONG`s, Prensa Escrita, Víctimas y Abogados, como se dan los procesos de construcción de memoria alrededor del denominado “Juicio del Siglo”, seguido por colonos e indígenas del nor-oriente ecuatoriano en contra de una de las compañías petroleras mas grandes del mundo; la Chevron Texaco. El juicio arrancó el 3 de Noviembre de 1993 cuando se presentó la demanda en Nueva York; diez años después, fue remitido a la Corte Superior de Nueva Loja, Ecuador, en donde el 21 de Octubre del 2003 se abrió el período de prueba contra la Chevron Texaco. El juicio que se sigue ahora en Nueva Loja, no ha cambiado de objetivo: hacer que la compañía responda por más de veinte años de contaminación ambiental cuyas nefastas consecuencias están a la vista y se traducen en una verdadera amenaza para la salud de los pobladores de la región, quienes contraen múltiples enfermedades, algunas de ellas de carácter irreversible, como el cáncer, que ha cobrado la vida de al menos 81 personas y que sigue matando indígenas y colonos del sector quienes consumen agua de ríos altamente contaminados.

Foro: revista de derecho. 17 (Recensiones)

Presenta las reseñas de los siguientes libros: María Paz Ávila Ordóñez, Ramiro Ávila Santamaría, Gustavo Gómez Germano, edits., Libertad de expresión: debates, alcances y nueva agenda, Quito, Oficina del Alto Comisionado de Naciones Unidas para los Derechos Humanos (OHCHR) y Organización de las Naciones Unidas para la Educación, la Ciencia y la Cultura (UNESCO), 2012. -- Andrew T. Guzmán, Cómo funciona el Derecho Internacional: una teoría de elección racional, Nueva York, Oxford University Press, 260 pp.

Caso Texaco 2011: una sentencia legendaria y una gigante transnacional buscando impunidad

Presenta la situación del Caso Texaco con la sentencia nacional que determinó la responsabilidad de la petrolera, luego de 18 años de proceso, evidenciando la incertidumbre que pesa respecto de la efectiva compensación y reparación de los afectados del nor oriente ecuatoriano ante las acciones legales interpuestas por Chevron: denuncias contra los abogados, expertos y dirigentes de los afectados por Texaco; demanda por extorsión contra los demandantes, sus abogados y consultores ambientales en Nueva York y el proceso de arbitraje bajo el TIAR con el que Chevron pretende se declare que la compañía no tiene responsabilidad.

El derecho a la reparación de las comunidades afectadas por Chevron-Texaco

Entre 1964 y 1990 la compañía petrolera Texaco causó un grave desastre ambiental y humano en el nororiente del Ecuador, por lo que las comunidades indígenas y campesinas presentaron en 1993 una acción en su contra en las cortes de Nueva York. Durante casi 10 años la petrolera luchó para que estas cortes desestimen la causa y la envíen al Ecuador, alegando que era esta la jurisdicción donde debía resolverse el caso. En 2002 las cortes norteamericanas desestimaron la causa por forum non conveniens y en 2003 se presentó una acción contra Chevron Corporation (en adelante Chevron), que en 2001 se había fusionado con Texaco, ante la Corte Provincial de Sucumbíos. Después de 56 inspecciones judiciales, 118 informes periciales, cerca de 64.000 resultados de laboratorio y alrededor de 215.000 páginas de expediente, el 14 de febrero de 2011 el Presidente de la Corte Provincial de Sucumbíos emitió sentencia condenatoria contra Chevron, estableciendo la obligación de pago por medidas de reparación: principales, complementarias y de mitigación que suman un total de US $ 19.021’552.000

Determination of the in vivo prebiotic potential of a maize based wholegrain breakfast cereal: a human feeding study

Epidemiological studies have shown an inverse relationship between risk of CVD and intake of whole grain (WG)-rich food. Regular consumption of breakfast cereals can provide not only an increase in dietary WG but also improvements to cardiovascular health. Various mechanisms have been proposed, including prebiotic modulation of the colonic microbiota. In the present study, the prebiotic activity of a maize-derived WG cereal (WGM) was evaluated in a double-blind, placebo-controlled human feeding study (n 32). For a period of 21 d, healthy men and women, mean age 32 (sd 8) years and BMI 23·3 (sd 0·58) kg/m2, consumed either 48 g/d WG cereal (WGM) or 48 g placebo cereal (non-whole grain (NWG)) in a crossover fashion. Faecal samples were collected at five points during the study on days 0, 21, 42, 63 and 84 (representing at baseline, after both treatments and both wash-out periods). Faecal bacteriology was assessed using fluorescence in situ hybridisation with 16S rRNA oligonucleotide probes specific for Bacteroides spp., Bifidobacterium spp., Clostridium histolyticum/perfringens subgroup, Lactobacillus–Enterococcus subgroup and total bacteria. After 21 d consumption of WGM, mean group levels of faecal bifidobacteria increased significantly compared with the control cereal (P = 0·001). After a 3-week wash-out period, bifidobacterial levels returned to pre-intervention levels. No statistically significant changes were observed in serum lipids, glucose or measures of faecal output. In conclusion, this WG maize-enriched breakfast cereal mediated a bifidogenic modulation of the gut microbiota, indicating a possible prebiotic mode of action

Effect of 830 nm low-level laser therapy applied before high-intensity exercises on skeletal muscle recovery in athletes

Our aim was to investigate the immediate effects of bilateral, 830 nm, low-level laser therapy (LLLT) on high-intensity exercise and biochemical markers of skeletal muscle recovery, in a randomised, double-blind, placebo-controlled, crossover trial set in a sports physiotherapy clinic. Twenty male athletes (nine professional volleyball players and eleven adolescent soccer players) participated. Active LLLT (830 nm wavelength, 100 mW, spot size 0.0028 cm(2), 3-4 J per point) or an identical placebo LLLT was delivered to five points in the rectus femoris muscle (bilaterally). The main outcome measures were the work performed in the Wingate test: 30 s of maximum cycling with a load of 7.5% of body weight, and the measurement of blood lactate (BL) and creatine kinase (CK) levels before and after exercise. There was no significant difference in the work performed during the Wingate test (P > 0.05) between subjects given active LLLT and those given placebo LLLT. For volleyball athletes, the change in CK levels from before to after the exercise test was significantly lower (P = 0.0133) for those given active LLLT (2.52 U l(-1) +/- 7.04 U l(-1)) than for those given placebo LLLT (28.49 U l(-1) +/- 22.62 U l(-1)). For the soccer athletes, the change in blood lactate levels from before exercise to 15 min after exercise was significantly lower (P < 0.01) in the group subjected to active LLLT (8.55 mmol l(-1) +/- 2.14 mmol l(-1)) than in the group subjected to placebo LLLT (10.52 mmol l(-1) +/- 1.82 mmol l(-1)). LLLT irradiation before the Wingate test seemed to inhibit an expected post-exercise increase in CK level and to accelerate post-exercise lactate removal without affecting test performance. These findings suggest that LLLT may be of benefit in accelerating post-exercise recovery.

MICROBIOLOGICAL CONTAMINATION of A HEMODIALYSIS CENTER WATER DISTRIBUTION SYSTEM

The microbiological monitoring of the water used for hemodialysis is extremely important, especially because of the debilitated immune system of patients suffering from chronic renal insufficiency. To investigate the occurrence and species diversity of bacteria in waters, water samples were collected monthly from a hemodialysis center in upstate São Paulo and tap water samples at the terminal sites of the distribution system was sampled repeatedly (22 times) at each of five points in the distribution system; a further 36 samples were taken from cannulae in 19 hemodialysis machines that were ready for the next patient, four samples from the reuse system and 13 from the water storage system. To identify bacteria, samples were filtered through 0.22 mu m-pore membranes; for mycobacteria, 0.45 mu m pores were used. Conventional microbiological and molecular methods were used in the analysis. Bacteria were isolated from the distribution system (128 isolates), kidney machine water (43) and reuse system (3). Among these isolates, 32 were Gram-positive rods, 120 Gram-negative rods, 20 Gram-positive cocci and 11 mycobacteria. We propose the continual monitoring of the water supplies in hemodialysis centers and the adoption of effective prophylactic measures that minimize the exposure of these immunodeficient patients to contaminated sources of water.

Indicadores associados a acidentes de trânsito envolvendo motoristas de ônibus da cidade de Natal

The purpose of this study was to investigate indicators of urban bus drivers involvement in transit accidents. We analyzed their involvement in accidents in relation to several indicators suggested by the literature, including the temporal dimension of those bus drivers, as expressed in Zimbardo's Time Perspective Inventory (ZTPI), for previous studies have shown that people more present time oriented revealed greater tendency to engage in risk driving. A questionnaire was applied to 457 bus drivers of the city of Natal, RN, Brazil, with questions about participants socio-demographic information, their professional performance and items on time perspective, presented in a five points Likert type scale. Among the indicators analyzed, the best predictors of traffic accidents were: worried about not being on schedule, family problems, and falling asleep; to work overtime, passengers complaints, work while on vacations and medical leaves. In regard to drivers' time perspective, the sub-scale of "combined present" showed a positive relationship with involvement in transit accidents, while the future scale a negative one, in both cases in accordance with the expect direction, even though the effects have not been statistically significant. The selected predictive variable indicate that traffic accidents are mainly associated to situational factors, that could be prevented through the betterment of work conditions of the bus drivers and other organizational and public policies, since transit accidents should be part of initiatives in the areas of health and safety

Effect of Caries Infiltration Technique and Fluoride Therapy on Microhardness of Enamel Carious Lesions

Enamel white spot subsurface lesions compromise esthetics and precede cavitation; therefore, they must be halted. The aim of this study was to evaluate the effect of a caries infiltration technique and fluoride therapy on the microhardness of enamel carious lesions. Subsurface carious lesions were produced in 60 bovine specimens with polished enamel surfaces. The specimens were divided into four groups (n=15), according to the treatment used: CON, control immersion in artificial saliva; DF, daily 0.05% fluoride solution; WF, weekly 2% fluoride gel; and IC, resin infiltration (Icon). The specimens were kept in artificial saliva and evaluated for microhardness at five points: baseline, after caries production, after four and eight weeks of treatment, and a final evaluation after being submitted to a new acid challenge. The repeated-measures analysis of variance showed significant differences according to the type of treatment (TREAT; p=0.001) and time of evaluation (EV; p=0.001). The results of the Tukey test were TREAT: CON = 45.18 (+/- 29.17)a, DF = 107.75 (+/- 67.38)b, WF = 83.25 (+/- 51.17)c, and IC = 160.83 (+/- 91.11)d. Analysis of correlation between the TREAT and EV factors showed no significant differences for DF (138.63 +/- 38.94) and IC (160.99 +/- 46.13) after the new acid challenge. The microhardness results in decreasing order after eight weeks were IC > DF > WF > CON. It was concluded that the microhardness of carious lesions increased with the infiltration of resin, while the final microhardness after a new acid challenge was similar for DF and IC.

Comparison of direct digital and conventional imaging with Ekta Speed Plus and INSIGHT films for the detection of approximal caries

Purpose: To evaluate the accuracy of approximal caries detection comparing enhanced and unenhanced Sidexis CCD-based digital image with Ektaspeed Plus and INSIGHT films. Methods: Fifty-two extracted premolars were imaged under identical standardized geometric and exposure conditions. Four observers, using five points confidence scale, rated 104 approximal surfaces for the presence or absence of carious lesions by means of four image modalities: (1) observer enhanced; (2) unenhanced Sidexis displays; (3) E speed films and (4) F speed film. Histologic sections served as validating criterion for the presence and depth of carious lesions. Diagnostic accuracy was measured as the area beneath the ROC curve. Results: Mean ROC (receiver operating characteristic) curve areas for approximal surfaces were 0.865 (E speed), 0.856 (F speed), 0.816 (unenhanced Sidexis) and 0.776 (observer enhanced). There were no significant differences between unenhanced digital Sidexis and films. Observer enhanced Sidexis images exhibited a statistically significant lower diagnostic accuracy than the film images for two of the observers.

Dissipation of DDT in a heavily contaminated soil in Mato Grosso, Brazil

After the prohibition of organochlorine-pesticide use in Brazil for controlling insect vector diseases, Mato Grosso State gathered the exceeding DDT and stored it irregularly in an open air area that belongs to the National Health Foundation, causing soil contamination. This study aimed to evaluate the contamination level and dissipation of p,p′-DDT and p,p′-DDE in this area. For that, surface soil samples were collected on 19 September 2000, 15 December 2000, 4 April 2001 and soil samples 30-40 cm; 60-70 cm and 90-100 cm deep were taken from five points in the studied area on 17 July 2001. The contaminants were determined by a small scale method which consists on extraction and clean-up steps combined into one step by transferring soil samples mixed with neutral alumina to a chromatographic column prepacked with neutral alumina and elution with hexane:dichloromethane (7:3 v:v). The eluate was concentrated and the analytes were quantified by gas chromatography with an electron-capture detector. p,p′-DDT at surface soil ranged from 3800 to 7300 mg kg -1. 30-40 cm deep soil sample concentrations varied from 0.036 to 440 mg kg -1 while 90-100 cm deep samples varied from 0.069 to 180 mg kg -1. Volatilization is probably the main dissipation process. The p,p′-DDT is moving slowly downward in the soil profile, however, the levels of this contaminant are high enough to present risk to underground waters. © 2005 Elsevier Ltd. All rights reserved.

La pobreza en América Latina y el Caribe aún tiene nombre de infancia

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El progreso de América Latina y el Caribe hacia los Objetivos de Desarrollo del Milenio: desafío para lograrlos con igualdad

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Implicaciones de la política macroeconómica, los choques externos y los sistemas de protección social en la pobreza, la desigualdad y la vulnerabilidad: El caso del Ecuador, 1990-2006

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