Glass transitions and state diagram for freeze-dried pineapple

Glass transition temperature of freeze-dried pineapple conditioned by adsorption at various water activities at 25 degreesC was determined by differential scanning calorimetry (DSC). High moisture content samples corresponding to water activities higher than 0.9, obtained by liquid water addition, were also analysed. The DSC traces showed a well-visible shift in baseline at the glass transition temperature (T(g)). Besides, no ice formation was observed until water activity was equal to 0.75. For water activities lower than 0.88, the glass transition curve showed that T(g) decreased with increasing moisture content and the experimental data could be well-correlated by the Gordon-Taylor equation. For higher water activities, this curve exhibited a discontinuity, with suddenly increasing glass transition temperatures approaching a constant value that corresponds to the T(g) of the maximally freeze-concentrated amorphous matrix. The unfreezable water content was determined through melting enthalpy dependence on the sample moisture content.

O percurso estratégico em atividades de compreensão oral: enunciados propostos versus enunciados inovados

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Gestão da informação em ambiente web: aplicação da inteligência competitiva para o setor industrial de confecções da região de Londrina/PR

Pós-graduação em Ciência da Informação - FFC

A variação e a mudança lexical da língua portuguesa em Moçambique

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Globalização, desemprego e (nova) pobreza: estudo sobre impactes nas sodiedades portuguesa e brasileira

This article reflects upon the possible connections between the processes of economic globalization, changes in the labour market and the new forms of poverty. The debate is framed by two different economic contexts: Portugal (characterized by slow and insufficient growth rates, a serious social crisis, and difficulties in asserting itself economically and politically in the European and world contexts) and Brazil (a dynamic emerging economy, with high growth rates and receding poverty levels). This allows us to assess some of the economic and social impacts arising from the global pressure to be economically competitive, which have led to new forms of poverty, social precariousness and job insecurity in both societies.

Strategic planning for dairy cattle: SWOT analysis applied to a property of a farmers' association in Dracena, São Paulo state, Brazil

The sector of milk production in Brazil is very heterogeneous (high-tech in large scale X family properties). This study aimed to develop a diagnostic as a basis for a strategic plan to face the challenges inherent in operating a dairy farm in property of a farmers' association in Dracena, São Paulo, Brazil. It was observed that the association needs a more efficient guidance in the marketing, production and finance areas, not to compromise the search for new markets and continued growth in activity.

Redes sociais de produtores de mandioca em regiões do estado de São Paulo

This paper analyzed and mapped social networks among cassava farmers in São Paulo, gathered in search of information regarding production and marketing. A descriptive research, using semi-structured questionnaires, in Tupa and Assis regions, was conducted. UCINET software assisted the analysis of interactions within networks. The results indicate that Tupa network is diffuse and there is little interaction with technology transfer institutions. In Assis, the network is cohesive with greater technological diffusion.