Development of nanoencapsulation forms from Cymbopogon citratus essential Oil

Cymbopogon citratus essential oil (CCEO) is widely used in food, cosmetics and pharmaceutical fields. The aim of this study was to compare two different methods of encapsulating CCEO. The o/w emulsion method was employed here for the first time for producing CCEO nanoparticles with polycaprolactone (PCL) and a molecular inclusion in β-cyclodextrin (CyD) using the precipitation method. The nanoparticles were spherical in shape, with 240.0 nm mean diameter and demonstrated a higher encapsulation efficiency (36.51 %) as the citral content. The efficiency of CCEO/CyD complex was lower (9.46 %) and it showed some specificity for the smallest molecules present in the original oil. It was irregular in shape and had a larger mean diameter (441.2 nm). It was concluded that the o/w emulsion method was the most effective for CCEO encapsulation. The positive findings in this study encourage further research and provide perspectives for the development of phytotherapeutic products from CCEO.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Irregular Migration Theories

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The Study of Irregular Migration

AbstractThe study of irregular migration as a specific social phenomenon took off during the 70s in the US. Since then, the academic interest has continually grown and spread, first to Europe and, in the last years, to other regions worldwide. This interest can certainly be related to the increasing attention paid to the study of migrations more in general (Castles & Miller, 1993). The trend can be linked to those broad and complex social and economic changes, often subsumed under the concept of globalization. The specific focus on irregular migration, though gaining momentum throughout the 1980s, reached preeminent attention in the 1990s. On both sides of the Atlantic, the explosion of the so-called "migration crisis" (Zolberg & Benda, 2001) and the emergence of irregular migration as a widespread social fact raised the attention of public opinion and academics alike. Moreover, in recent years, what seemed at first to be an issue concerning only the high-income regions of the planet, now involves also medium and low-income ones, making irregular migration a truly global structural phenomenon (Cvajner & Sciortino, 2010a; Düvell, 2006)