3 documents found, page 1 of 1
Combined effect of pediocin bacHA-6111-2 and high hydrostatic pressure to contr...
Castro, S. M.; Silva, J.; Casquete, R.; Queirós, Rui; Saraiva, J. A.; Teixeira, P.In and ex situ production of bacteriocin (bacHA-6111-2) combined with high hydrostatic pressure (300 MPa, 5 min, 10ºC) were assessed on the survival of Listeria innocua reviously inoculated in Alheira, a traditional Portuguese fermented meat product. The effect was evaluated immediately after each treatment, alone and combined, and during 60 days of storage (4ºC). For higher concentrations of L. innocua, a bact...
Bioactive polysaccharides extracts from sargassum muticumby high hydrostatic pr...
Rodrigues, Dina; Freitas, Ana C.; Queirós, Rui; Rocha-Santos, Teresa A. P.; Saraiva, Jorge A.; Gomes, Ana M. P.; Duarte, Armando C.Sargassum muticum is an important source of bioactive polysaccharides; hence, high hydrostatic pressure (HHP) was used to improve their extraction efficiency. Response surface methodology and a Box-Behnken full factorial design were employed to assess and optimize the effects of extraction conditions on the yield, total sugars, total sulfated sugars and antioxidant activity of S. muticum extracts. The extractio...
Testing four methods to assess leaf area in young olive trees
Coelho, Renato; Dambiro, José; Carlos, Rui; Pirata, Madalena; Campos, Tiago; Queirós, Rui; Carrilho, João; Barreto, Sérgio; Tufik, CamilaAssessment of leaf area is of fundamental importance to calculate diverse physiological parameters such as the total rate of transpiration or photosynthesis of a plant or its leaf area index (LAI). This paper reports the determination of total leaf area in 3 year-old olive trees of two varieties using four different methods and leaf counting as the control method. Leaf area was determined on 7 plants of each va...