BUSCADOR RECOLECTA

Buenas relaciones con Portugal. Mucho comercio. Contrabando y aduaneros. Ahora pasa mucha droga., Boas relações com Portugal. Muito comércio. Contrabando e alfândega. Agora passam muitas drogas., Good relations with Portugal. Lots of trade. Contraband and customs. Now a lot of drugs go by.

Project developed by Giovanni Federico (New York University Abu Dhabi) and Antonio Tena Junguito (Universidad Carlos III de Madrid). Dataset: Jamaica

Project developed by Giovanni Federico (New York University Abu Dhabi) and Antonio Tena Junguito (Universidad Carlos III de Madrid). Dataset: German West Africa (Togo)

No se iba mucho a Elvas, pero las relaciones eran buenas. Comercio (y contrabando) de café y tabaco. Estrategias para burlar a los aduaneros. Venían muchos portugueses a comprar muñecas, pero lo hacían a través de Badajoz; no tener operativo el puente les perjudicó mucho., As pessoas não iam muito a Elvas, mas as relações eram boas. Comércio (e contrabando) de café e tabaco. Estratégias para contornar os funcionários aduaneiros. Muitos portugueses vinham comprar bonecas, mas faziam-no através de Badajoz; não ter a ponte em funcionamento era muito prejudicial para eles., People did not go to Elvas much, but relations were good. Trade (and smuggling) of coffee and tobacco. Strategies to get around the customs officers. Many Portuguese came to buy dolls, but they did so through Badajoz; not having the bridge in operation was very detrimental to them

Los informantes enseñan algunos de los objetos tradicionales que almacenan en su casa., Os informantes mostram alguns dos objectos tradicionais que guardam em casa., Informants show some of the traditional objects they store at home.

Project developed by Christopher Absell (University Gothenburg and Instituto Figuerola) Giovanni Federico (New York University Dubai) and Antonio Tena Junguito (Universidad Carlos III de Madrid and Instituto Figuerola). Dataset: Serbia

Project developed by Christopher Absell (University Gothenburg and Instituto Figuerola) Giovanni Federico (New York University Dubai) and Antonio Tena Junguito (Universidad Carlos III de Madrid and Instituto Figuerola). Dataset: Belgium

Project developed by Giovanni Federico (Università di Pisa) and Antonio Tena Junguito (Universidad Carlos III de Madrid). This data base outlines changes in world trade from 1800 to 2016. Dataset: Belgian Congo (Zaire)

Project developed by Christopher Absell (University Gothenburg and Instituto Figuerola) Giovanni Federico (New York University Dubai) and Antonio Tena Junguito (Universidad Carlos III de Madrid and Instituto Figuerola). Dataset: Cuba

Currently, the preparation of high-quality graphene (G) dispersions is crucial due to the increasing demand for this nanomaterial in a wide range of industries. However, given the strong π–π stacking tendency between G sheets, dispersant agents such as surfactants or polymers are required to attain stable and homogenous dispersions in liquid media. In the present project, the effectiveness of resveratrol (RV), a fluorescent bioactive compound with antioxidant activity, as a dispersing agent for G in aqueous solutions was assessed. The interaction between G and RV was investigated via absorbance, fluorescence and Raman measurements. Dispersions were prepared via bath sonication, followed by probe ultrasonication and centrifugation, though the two last stages have little effect on the dispersion quality. The addition of G causes a quenching on RV fluorescence, and its magnitude raises with increasing G concentration, being the effect stronger up to 10 mg L-1. The change in the centrifugation speed and time have hardly influence on the RV fluorescence in the presence of G. The RV content remaining in the bulk solution after G dispersion, measured via UV–Vis absorption, decreases linearly with increasing G concentration. RV can effectively disperse all the G present in the sample up to 10 mg L-1; at higher concentrations, the dispersing ability slightly decreases, and the G content is distributed between the bulk solution and the centrifuged residue. Besides, the fluorescence of RV dispersed in G is much higher in methanol than in an aqueous medium. TEM analysis confirms the good exfoliation of G upon ultrasonication in RV solutions and indicates that the layer thickness depends on the G/RV ratio. The results of this study could open new perspectives for using natural products like resveratrol as biocompatible and efficient dispersing agents of G to be used in numerous applications, especially in biomedicine.