Browsing by Issue Date, starting with "2007-11"
Now showing 1 - 4 of 4
Results Per Page
Sort Options
- Survival of different Listeria monocytogenes strains to combined stressesPublication . Ramalheira, R.; Brandão, T.; Silva, J.; Hogg, T.; Teixeira, P.
- Improvement of whey cheese matrices via incorporation of Lactobacillus acidophilus — proteolytic and glycolytic activities and their impact upon sensory analysisPublication . Pintado, A. I. E.; Araújo, J. C. C.; Pintado, M. M. E.; Gomes, A. M. P.; Malcata, F. X.Requeijão is a highly nutritious soft Portuguese whey cheese, yet with such organoleptic limitations as poor flavour and grainy texture. Furthermore, it offers excellent conditions for survival and growth of lactic acid bacteria, owing to its high water activity, pH above 5.0 and low salt content. The objective of this research effort was thus to study the contribution of Lactobacillus acidophilus LAC 1 to the improvement of the organoleptic quality of Requeijão, via its proteolytic and glycolytic activities. Experimental whey cheese matrices were produced, and subsequently inoculated with L. acidophilus; these matrices, as well as a control curd, were stored at 7 °C, and samples were taken at 0, 2, 7, 14 and 21 d. Cell viability, pH, and fat, protein and moisture contents were assessed. The contents of water-soluble nitrogen (WSN), nitrogen soluble in 12 %(w/v) trichloroacetic acid (TCA) and nitrogen soluble in 5 %(w/v) phosphotungstic acid (PTA), as well as of lactose and organic acids were also determined. Sensory analysis was finally performed, using a five-point scale for the various attributes. L. acidophilus viable cells number remained constant up to 21 d, while pH decreased by ca. 0,6; this was consistent with an increase in lactic acid content up to 28 mg/g of whey cheese. Values of TCA and PTA in L. acidophilus matrices indicated relevant proteolytic breakdown of whey proteins. These matrices received the highest overall preference scores in sensory evaluation.
- A complexidade da toxicodependênciaPublication . Seabra, PauloTrabalhar com toxicodependentes? Respondo, procurando reflectir a essência dos cuidados de Enfermagem: A RELAÇÃO. Os fundamentos dos cuidados são iguais para todas as pessoas. O privilégio de cuidar de um ser humano tem que, decididamente, ser assumido pelos enfermeiros. A diferença está na percepção da complexidade desta problemática. A forma de comunicar é fundamental, e para isto os enfermeiros são bem preparados. Reflectir sobre o "cuidar”, é a forma de percebermos a importância do que fazemos e da sua especificidade.
- Survival of different Listeria monocytogenes strains to adverse conditionPublication . Rôla, M.; Brandão, T.; Silva, J.; Almeida, G.; Hogg, T.; Teixeira, P.