Resumo: O presente trabalho, desenvolvido no âmbito do Programa de P&D ANEEL, projeto 6491-0301/2013, tem por objetivo avaliar como diferentes teores de contaminação por sulfetos interferem nas características microestruturais e mecânicas de pastas, quando estas são submetidas a duas diferentes condições de exposição: ciclo de molhagem e secagem e tanque aerado. Para a análise do mecanismo deteriorante foram avaliadas quatro séries de pastas, uma referência e três contaminadas por enxofre, por meio de ensaios no estado fresco (consistência e massa específica) e endurecido (resistência à compressão axial e a tração na flexão, variação dimensional e DRX). Ao final do período estudado (84 dias) notou-se que os ensaios auxiliaram no entendimento do mecanismo, mas que este ainda estaria em um estágio inicial.

Abstract: The present work, developed in the scope of the R&D Program of ANEEL, project 6491-0301/2013, aims to evaluate how different levels of sulfide contamination interfere with the microstructural and mechanical characteristics of the cement pastes when they are submitted to two exposure conditions: wetting and drying cycle and aerated tank. For an analysis of the deteriorating mechanism, four series of cement pastes, one reference and three contaminated by sulfur, were evaluated by non-fresh tests (consistency and specific mass) and resistance (axial compression and flexural tensile strength, dimensional variation and XRD). At the end of the study period (84 days) it was noted that the auxiliary assays did understand the mechanism but that it would still be at an early stage.

Resumen: El presente trabajo, desarrollado en el marco del Programa de P&D ANEEL, proyecto 6491-0301/2013, tiene por objetivo evaluar diferentes contenidos de contaminación por sulfatos que interfieren en las características microestructurales y mecánicas de mezclas, cuando estas son sometidas a dos diferentes condiciones de exposición: ciclo de mojado y secado y tanque aireado. Para el análisis del mecanismo deteriorante, se evaluaron cuatro series de mezclas, una referencia y tres contaminadas por azufre, por medio de ensayos en estado fresco (consistencia y peso específico) y endurecido (resistencia a la compresión axial y la tracción en la flexión, variación dimensional y DRX). Al final del período estudiado (84 días) se notó que los ensayos ayudaron en el entendimiento del mecanismo, pero que esta unión estaría en una etapa inicial.

Introduction A duplicated renal collecting system is a relatively common congenital anomaly rarely presenting in adults. Aim In this video we demonstrate our step-by-step technique of Robotic heminephrectomy in a patient with non-functioning upper pole moiety. Materials and Methods Following cystoscopy and ureteral catheter insertion the patient was placed in 600 modified flank position with the ipsilateral arm positioned at the side of the patient. A straight-line, three arm robotic port configuration was employed. The robot was docked at a 90-degree angle, perpendicular to the patient. Following mobilization the colon and identifying both ureters of the duplicated system, the ureters were followed cephalically toward, hilar vessels where the hilar anatomy was identified. The nonfunctioning pole vasculature was ligated using hem-o-lok clips. The ureter was sharply divided and the proximal ureteral stump was passed posterior the renal hilum. Ureteral stump was used as for retraction and heminephrectomy is completed along the line demarcating the upper and lower pole moieties. Renorrhaphy was performed using 0-Vicryl suture with a CT-1 needle. The nonfunctioning pole ureter was then dissected caudally toward the bladder hiatus, ligated using clips, and transected. Results The operating time was 240 minutes and blood loss was 100 cc. There was no complication post-operatively. Conclusions Wrist articulation and degree of freedom offered by robotic platform facilitates successful performance of minimally invasive heminephrectomy in the setting of an atrophic and symptomatic renal segment.