12 documents found, page 1 of 2

O papel do ensino superior no desenvolvimento regional: uma perspetiva para os ...

Construção de um roteiro de entrevista: perceções dos professores sobre o traba...

O desenvolvimento do trabalho prático tem vindo a ser considerado pelos professores de ciências como uma metodologia intrinsecamente relacionada com a sua prática letiva. Algumas limitações e/ou constrangimentos, no entanto, são também identificados pelos professores. Por ser relevante conhecer a opinião destes agentes educativos sobre as múltiplas facetas do trabalho prático, este estudo teve por objetivo cons...

Validation of a spectrophotometric methodology for a rapid iodine analysis in a...

Iodine plays an important role in human metabolism and its deficiency is particularly harmful in pregnancy and childhood. It remains a major public health concern in many countries, especially in Portugal. The main purpose of this work was to develop a validated spectrophotometric analysis for a fast and reliable iodine quantification in algal samples. Absorbance was determined at 410 nm demonstrating a good li...

Constructing ethanol-derived bioactive extracts using the brown seaweed Zonaria...

Understanding the biochemical and antioxidant composition and capacity of a target biomass is the first step to its selectivity as functional food which can enhance the ability to promote health by reducing the risk of chronic diseases. The main purpose of this work was to employ response surface methodology (RSM) to determine the effect of the independent variables, % of ethanol (50–96%), time of sonication (0...

Nutraceutical potential of Asparagopsis taxiformis (Delile) Trevisan extracts a...

The main goal of the present work was to determine the nutraceutical potential of Asparagopsis taxiformis D. extracts from Madeira Archipelago south coast. Extraction methodologies consisted either/or in 72 hours stirring, at room temperature (M1), or 6 cycles of Soxhlet extraction (M2), both with re-extraction. Solvents used were distilled water, ethanol, methanol and ethyl acetate. M1 allowed to obtain the hi...

Nutraceutical potential of Asparagopsis taxiformis (Delile) Trevisan extracts a...

The main goal of the present work was to determine the nutraceutical potential of Asparagopsis taxiformis D. extracts from Madeira Archipelago south coast. Extraction methodologies consisted either/or in 72 hours stirring, at room temperature (M1), or 6 cycles of Soxhlet extraction (M2), both with re-extraction. Solvents used were distilled water, ethanol, methanol and ethyl acetate. M1 allowed to obtain the hi...

Nutraceutical potential of Asparagopsis taxiformis (Delile) Trevisan extracts a...

The main goal of the present work was to determine the nutraceutical potential of Asparagopsis taxiformis D. extracts from Madeira Archipelago south coast. Extraction methodologies consisted either/or in 72 hours stirring, at room temperature (M1), or 6 cycles of Soxhlet extraction (M2), both with re-extraction. Solvents used were distilled water, ethanol, methanol and ethyl acetate. M1 allowed to obtain the hi...

The effectiveness of two contrasting mulch application rates to reduce post-fir...

Wildfires are well-known to increase runoff and erosion during the initial stages of the window-of-disturbance, and mulching has been widely documented to effectively minimize this impact. However, the relationship between the rate of mulch application and erosion reduction is poorly studied, in spite of its potential importance for optimizing mulching costs and efforts per ha. Therefore, a field experiment was...

Biochemical composition, nutritional value, and antioxidant properties of seven...

Biochemical composition and antioxidant activity were assessed in seven seaweeds from Madeira Archipelago, namely, the chlorophyte (Ulva lactuca), the rhodophytes (Asparagopsis taxiformis, Chondrus crispus, Galaxaura rugosa, Grateloupia lanceola and Nemalion elminthoides), and the phaeophyte (Zonaria tournefortii). Seaweed mineral content varied from 16.60 to 84.16 g (100 g)-1 dry weight (dw). Organic matter, c...

Adipose tissue in attenuation and scattering correction in myocardial perfusion...

Assess the influence of thoracic AT on cardiac SPECT/CT counts, after attenuation correction and scatter correction.