Mediciones de calidad de aire en La Plata, Berisso y Ensenada

Este trabajo de carácter multidisciplinario constituye un aporte para el mejor conocimiento de la calidad del aire de la zona urbana e industrial correspondiente a La Plata, Berisso y Ensenada. Se intenta correlacionar los resultados obtenidos mediante el empleo de distintas técnicas, tales como corrosión atmosférica sobre acero, liqúenes como bioindicadores y medición de dióxido de azufre por métodos óptico y químico. Se hace un comentario de la corrosión atmosférica sobre el acero, y los efectos que produce. Se presentan las ventajas e inconvenientes de la utilización de bioindicadores de contaminantes del aire, en particular los liqúenes. Se describen las metodologías empleadas en cada técnica y se citan los equipos e instrumentos utilizados. Finalmente se brindan los resultados preliminares obtenidos en cada caso hasta el presente y un comentario de los mismos.Tema: Hábitat y ambiente.Asociación Argentina de Energía Sola

Mediciones de calidad de aire en La Plata, Berisso y Ensenada

Este trabajo de carácter multidisciplinario constituye un aporte para el mejor conocimiento de la calidad del aire de la zona urbana e industrial correspondiente a La Plata, Berisso y Ensenada. Se intenta correlacionar los resultados obtenidos mediante el empleo de distintas técnicas, tales como corrosión atmosférica sobre acero, liqúenes como bioindicadores y medición de dióxido de azufre por métodos óptico y químico. Se hace un comentario de la corrosión atmosférica sobre el acero, y los efectos que produce. Se presentan las ventajas e inconvenientes de la utilización de bioindicadores de contaminantes del aire, en particular los liqúenes. Se describen las metodologías empleadas en cada técnica y se citan los equipos e instrumentos utilizados. Finalmente se brindan los resultados preliminares obtenidos en cada caso hasta el presente y un comentario de los mismos.Tema: Hábitat y ambiente.Asociación Argentina de Energía Sola

Mediciones de calidad de aire en La Plata, Berisso y Ensenada

Este trabajo de carácter multidisciplinario constituye un aporte para el mejor conocimiento de la calidad del aire de la zona urbana e industrial correspondiente a La Plata, Berisso y Ensenada. Se intenta correlacionar los resultados obtenidos mediante el empleo de distintas técnicas, tales como corrosión atmosférica sobre acero, liqúenes como bioindicadores y medición de dióxido de azufre por métodos óptico y químico. Se hace un comentario de la corrosión atmosférica sobre el acero, y los efectos que produce. Se presentan las ventajas e inconvenientes de la utilización de bioindicadores de contaminantes del aire, en particular los liqúenes. Se describen las metodologías empleadas en cada técnica y se citan los equipos e instrumentos utilizados. Finalmente se brindan los resultados preliminares obtenidos en cada caso hasta el presente y un comentario de los mismos.Tema: Hábitat y ambiente.Asociación Argentina de Energía Sola

Effect of consanguinity on Argentinean Angus beef DNA traceability

Since the 1990s several authors have envisaged the use of DNA to certify meat origin. Two major parameters must be assessed before a DNA based traceability protocol can be implemented in the food chain: (i) the information content of a DNA marker set in a specific livestock breed or group of breeds; (ii) the minimum number of DNA markers needed to obtain a statistically acceptable match probability. The objective of the present work was to establish the effect of different levels of inbreeding in the matching efficiency, and the minimum number of microsatellite markers needed, in a DNA based meat traceability program, starting from an 11-microsatellite marker panel. Samples were obtained from beef production farms in South America, where animals are typically bred under pasture-based extensive conditions. Three groups of animals with different consanguinity rates were sampled. Exclusion power (Q) was higher than 0.999998 and match probability lower than 3.01E-08, for the whole set of markers within each group. Both values were affected by consanguinity. To reach a two mismatch criteria exclusion power (Q2) of 99.99, six markers were needed in unrelated animals whereas seven markers were needed in related animals. To reach Q2=99.9999, 8 and 10 microsatellite markers, respectively, were needed. In general, one or two more microsatellite markers were needed to identify consanguineous animals. This study proved the DNA marker set used to be suitable for the identification of the meat from all slaughtered animals in Argentina, per week, month, and year. © 2010 Elsevier Ltd.Fil: Baldo, Andres. Facultad de Ciencias Veterinarias, Universidad Nacional de la Plata; ArgentinaFil: Rogberg Muñoz, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Prando, Alberto José. Facultad de Ciencias Veterinarias, Universidad Nacional de la Plata; ArgentinaFil: Mello Cesar, A.S.. Functional Genomics Laboratory; ItaliaFil: Liron, Juan Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Sorarrain, Nicolas. Facultad de Ciencias Veterinarias, Universidad Nacional de la Plata; ArgentinaFil: Ramelli, P.. Functional Genomics Laboratory; ItaliaFil: Posik, Diego Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; ArgentinaFil: Pofcher, Enrique Jorge. Facultad de Ciencias Veterinarias, Universidad Nacional de la Plata; ArgentinaFil: Ripoli, María Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Beretta, E.. Consorzio Qualità Della Carne Bovina c/o Coldiretti; ItaliaFil: Peral Garcia, Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Vaca, R.. Facultad de Ciencias Veterinarias, Universidad Nacional de la Plata; ArgentinaFil: Mariani, P.. Functional Genomics Laboratory; ItaliaFil: Giovambattista, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentin

Stoma-free Survival After Rectal Cancer Resection With Anastomotic Leakage: Development and Validation of a Prediction Model in a Large International Cohort.

Objective:To develop and validate a prediction model (STOMA score) for 1-year stoma-free survival in patients with rectal cancer (RC) with anastomotic leakage (AL).Background:AL after RC resection often results in a permanent stoma.Methods:This international retrospective cohort study (TENTACLE-Rectum) encompassed 216 participating centres and included patients who developed AL after RC surgery between 2014 and 2018. Clinically relevant predictors for 1-year stoma-free survival were included in uni and multivariable logistic regression models. The STOMA score was developed and internally validated in a cohort of patients operated between 2014 and 2017, with subsequent temporal validation in a 2018 cohort. The discriminative power and calibration of the models' performance were evaluated.Results:This study included 2499 patients with AL, 1954 in the development cohort and 545 in the validation cohort. Baseline characteristics were comparable. One-year stoma-free survival was 45.0% in the development cohort and 43.7% in the validation cohort. The following predictors were included in the STOMA score: sex, age, American Society of Anestesiologist classification, body mass index, clinical M-disease, neoadjuvant therapy, abdominal and transanal approach, primary defunctioning stoma, multivisceral resection, clinical setting in which AL was diagnosed, postoperative day of AL diagnosis, abdominal contamination, anastomotic defect circumference, bowel wall ischemia, anastomotic fistula, retraction, and reactivation leakage. The STOMA score showed good discrimination and calibration (c-index: 0.71, 95% CI: 0.66-0.76).Conclusions:The STOMA score consists of 18 clinically relevant factors and estimates the individual risk for 1-year stoma-free survival in patients with AL after RC surgery, which may improve patient counseling and give guidance when analyzing the efficacy of different treatment strategies in future studies

Stoma-free survival after anastomotic leak following rectal cancer resection: worldwide cohort of 2470 patients

Background: The optimal treatment of anastomotic leak after rectal cancer resection is unclear. This worldwide cohort study aimed to provide an overview of four treatment strategies applied. Methods: Patients from 216 centres and 45 countries with anastomotic leak after rectal cancer resection between 2014 and 2018 were included. Treatment was categorized as salvage surgery, faecal diversion with passive or active (vacuum) drainage, and no primary/secondary faecal diversion. The primary outcome was 1-year stoma-free survival. In addition, passive and active drainage were compared using propensity score matching (2: 1). Results: Of 2470 evaluable patients, 388 (16.0 per cent) underwent salvage surgery, 1524 (62.0 per cent) passive drainage, 278 (11.0 per cent) active drainage, and 280 (11.0 per cent) had no faecal diversion. One-year stoma-free survival rates were 13.7, 48.3, 48.2, and 65.4 per cent respectively. Propensity score matching resulted in 556 patients with passive and 278 with active drainage. There was no statistically significant difference between these groups in 1-year stoma-free survival (OR 0.95, 95 per cent c.i. 0.66 to 1.33), with a risk difference of -1.1 (95 per cent c.i. -9.0 to 7.0) per cent. After active drainage, more patients required secondary salvage surgery (OR 2.32, 1.49 to 3.59), prolonged hospital admission (an additional 6 (95 per cent c.i. 2 to 10) days), and ICU admission (OR 1.41, 1.02 to 1.94). Mean duration of leak healing did not differ significantly (an additional 12 (-28 to 52) days). Conclusion: Primary salvage surgery or omission of faecal diversion likely correspond to the most severe and least severe leaks respectively. In patients with diverted leaks, stoma-free survival did not differ statistically between passive and active drainage, although the increased risk of secondary salvage surgery and ICU admission suggests residual confounding