The concentration of anthocyanins in fruits of “Assaria” pomegranate, a sweet Portuguese cultivar typically grown in Algarve (south Portugal), was monitored during storage under different conditions. The fruits were exposed to cold storage (5°C) after the following treatments: spraying with wax; spraying with 1.5% CaCl2; spraying with wax and 1.5% CaCl2; covering boxes with 25 μc thickness low-density polyethylene film. Untreated fruits were used as a control. The anthocyanin levels were quantified by either comparison with an external standard of cyanidin 3-rutinoside (based on the peak area) or individual calculation from the peak areas based on standard curves of each anthocyanin type. The storage time as well as the fruit treatment prior to storage influenced total anthocyanin content. The highest levels were observed at the end of the first month of storage, except for the fruits treated with CaCl2, where the maximal values were achieved at the end of the second month. The anthocyanin quantification method influenced the final result. When total anthocyanin was calculated as a sum of individual pigments quantified based on standard curves of each anthocyanin type, lower values were obtained.

Tourism flows to large cities have increased drastically in the past few years. The Alfama neighbourhood in Lisbon (Portugal) is facing major changes with respect to land uses, demographic features and social appropriation patterns in public spaces, caused by the intensification of tourism. The consequences of new emerging economic and symbolic values have rapidly given rise to a scenario of touristification and gentrification in the neighbourhood. In order to address such complexities, sustainable urban planning can benefit from real-time data sources that can represent the tourism flows in spatial and temporal perspectives. The research question allows Twitter to be used as an emerging data source and for analysing spatial patterns and content, based on two sample groups: residents and tourists, and their interpretations about the use of space for leisure activities. The research method is based on an analysis of two years of geotagged tweets in the city of Lisbon, differentiating between tourist and resident users, and, in a subsequent step, in the Alfama neighbourhood. The spatial distribution analysis and the content analysis have revealed not only spatio-temporal activity patterns but also emotional responses to new trends in urban tourism uses, consumption and perception of an increasing tourism pressure in Alfama. The results are relevant in the field of tourism and sustainable urban planning.

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Os conceitos de espaço público e vida pública são abordados sob uma perspectiva espácio-antropológica com o objetivo de refletir sobre possíveis impactos da implementação de tecnologias de vigilância intrusivas. A vigilância massiva de espaços públicos impacta sobre a privacidade individual e as relações de poder estabelecidas, mas torna-se justificável sob o argumento de que garante a sua segurança e é utilizada para a manutenção da ordem pública. Em consequência, sistemas tecnológicos de crescente complexidade vêm sendo desenvolvidos e implementados em cidades por todo o mundo. A reflexão sobre impactos da implementação de sistemas de vigilância baseados em tecnologias de inteligência artificial (IA) inclui questões éticas relacionadas com valores culturais e direitos adquiridos, sendo questionado o uso de tecnologias de reconhecimento facial e identificação biométrica para a identificação de indivíduos em espaços publicamente acessíveis com base nos princípios de transparência, autonomia, proporcionalidade e equidade.