Poly (α-dodecyl γ-glutamate) (PAAG-12) was successfully synthesized from poly(γ-glutamic acid) (PGGA) according to Nuclear Magnetic Resonance (NMR) analyses. PAAG-12 films were prepared and enriched with 5% α-tocopherol, with the aim of using them as novel antioxidant active packaging for food applications. Thermogravimetric Analysis (TGA) characterization determined that α-tocopherol improved thermal stability of films, which is beneficial for industrial processing. Polylactic Acid (PLA) films prepared with the same amount of α-tocopherol were used to set a comparative frame and both types of films were applied to two different food models to assess their protective action against oxidation. Water, 50% ethanol (EtOH) and 95% EtOH were used as food simulants and HPLC analyses were performed to determine diffusion and partition coefficients in PLA and the novel polymer, the latter exhibiting slower release rates. Primary oxidation was measured with peroxide value, which revealed that PAAG-12 films with α-tocopherol protected oil-in-water (O/W) emulsions up to 29 days, complying with the Codex Alimentarius.
During the last years, the Advanced Broadband Communications Center (CCABA) of the UPC has been involved in several projects related to Internet traffic monitoring and analysis in the Spanish National Research and Education Network (RedIRIS), namely CASTBA, MEHARI [1] and MIRA [2, 3]. As a result of such an experience, a new traffic monitoring and analysis system, called SMARTxAC, has been developed at CCABA in joint work with the Supercomputing Center of Catalonia (CESCA). SMARTxAC is an always-on passive monitoring and analysis system that operates at gigabit speeds without packet loss. It also integrates a web-based graphical interface that offers numerous traffic statistics online. The main difference between SMARTxAC and other passive measurement infrastructures and systems for high-speed networks, such as those instrumented by NLANR [4] and Sprint [5], lies in that SMARTxAC has been explicitly designed for online traffic analysis, whereas in other approaches traffic analysis tasks are usually postponed to an offline stage.
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