Soil hydro-physical variables and crop residues determinate runoff, soil loss, and glyphosate and AMPA concentration in the aqueous phase under simulated rainfall events.

Soil structural degradation and water erosion processes were observed even in no-tillage schemes in the Pampas region. Within these conservation systems, agrochemical application per hectare is one of the highest globally. Thus, this entails a serious risk of water contamination.

Genotoxicity of water samples from an area of the Pampean region (Argentina) impacted by agricultural and livestock activities.

The aim of this study was to assess the genotoxic potential of surface waters located in a rural area in the north east of Buenos Aires province (Argentina) using the Allium cepa test. Water samples were collected at four sites located in a drainage channel and two sites on the Burgos stream that receives water from the channel, taking into account the sowing and harvesting months and rainfall periods. Analytical determinations revealed high total concentrations of Cd, Cu, Pb, and Zn (maximum values: 0.

[Soil texture as a regulating factor of Escherichia coli adsorption in a Rolling Pampa basin (Argentina)].

Increase of bovine livestock rates in fragile areas of the Rolling Pampa entails a high risk of biological contamination. This biological contamination is regulated by edaphic variables such as texture, which control biological contaminants transport towards water bodies. In this work bacterial adsorption was correlated with individual particle sizes in 27 soils of a typical basin of the Rolling Pampa with slow centrifugation techniques.

Treatment of pectus excavatum in patients over 20 years of age.

Background: The ideal time to operate on pectus excavatum (PE) using the Nuss procedure (NP) is between 12 and 18 years of age, because it is more difficult to bend the sternum of older patients and they have more pain and complications. The authors present a prospective study of adult patients with PE operated on by NP, analyzing technical improvements, new tricks, bar modifications, and preliminary outcomes.

Materials And Methods: From May 2003 to September 2009, 19 patients presenting PE (group 1), aged 20-27 years, underwent NP.

Laparoscopic gastric pull-up for long gap esophageal atresia.

Background: Esophageal replacement (ER) is indicated for long gap esophageal atresia (LGEA) when anastomosisis not possible, especially in cases without fistula or when elongation techniques have failed. The authors show their techniques and analyze preliminary results of the laparoscopic gastric pull-up (LGPU) for ERin LGEA.

Methods: Four children with LGEA admitted for ER (three type A, one type C) underwent LGPU.