Antioxidant properties of mashua (Tropaeolum tuberosum) phenolic extracts against oxidative damage using biological in vitro assays

We thank Dr. Carlos Arbizu, International Potato Center (Lima, Peru) for providing the mashua genotypes and Alexandrine During and Yves-Jacques Schneider for their suggestions in the discussion of this paper. This research was supported by the CUI project of the Belgian Coopération Universitaire au Développement (CUD, Belgium) and by the Consejo Nacional de Ciencia y Tecnología (CONCYTEC, Peru).Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concyte

Strategies for avoiding preference profiling in agent-based e-commerce environments

Agent-based electronic commerce is known to offer many advantages to users. However, very few studies have been devoted to deal with privacy issues in this domain. Nowadays, privacy is of great concern and preserving users' privacy plays a crucial role to promote their trust in agent-based technologies. In this paper, we focus on preference profiling, which is a well-known threat to users' privacy. Specifically, we review strategies for customers' agents to prevent seller agents from obtaining accurate preference proles of the former group by using data mining techniques. We experimentally show the efficacy of each of these strategies and discuss their suitability in different situations. Our experimental results show that customers can improve their privacy notably with these strategies