Arsenic (As) was isolated for the first time as a chemical element by Jabir-Ibn-Haiyanb in the year 776, and its name comes etymologically from the Greek arsenicon (masculine). It is gray in color and of a shining metallic appearance, has little metallic properties, is distributed widely in the universe and its toxicity depends on the different chemical forms and states of oxidation that it has:-3, 0, +3 and +5. The historical evolution of the toxicology is intimately united to the use of this nonmetal. At present, arsenical substances are used in industry, agriculture, cattle ranching, and medicine. For that reason, the sources of exposure of man to this metal are diverse; out standing are labor, food and medicaments. In this work a revision is made of the etiology, preventive measures, analysis, diagnosis and treatment of the poisoning by As.

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National Development Banks (NDB) could be pictured as engines pushing backward economies through the developmental ladder's rungs. After being key protagonists of industrial policy after Second World War, most NDBs were dismantled during the 1980s and 90 s. Notable exceptions to this trend exist, however. The goal of this study is thus to understand the political economy issues; Institutional Capacity International Bargaining Power and Domestic Political Coalitions; that explain those trajectories, by taking the cases of Argentina (BANADE) and Brazil (BNDES). When analyzing these three dimensions of political economy the paper concludes that the main difference between BANADE and BNDES' trajectories seems to stem from the diverse Domestic Political Coalitions crafted by Argentina and Brazil, in each historical period. Understanding the underlying conditions to create a cohesive and solid NDB is fundamental to reassess their roles in the XXI century industrial policy.