Joana Marcos

Mrs. Joana Marcos

orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 March 2023 in Foods
Verified
Journal Article
Open access
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JMJoana Marcos
Joana Marcos
RCRaquel Carriço
Raquel Carriço
MSMaria João Sousa
Maria João Sousa
MPMaria Lídia Palma
Maria Lídia Palma
Paula PereiraPaula Pereira
Paula Pereira
Marisa NicolaiMarisa Nicolai
Marisa Nicolai
The wine industry generates large amounts of by-products that are usually destined as waste. Grape pomace is the residue of the winemaking process and is rich in compounds with functional properties, such as dietary fiber and phenolic compounds. The aim of this research was to study the influence of white and red grape pomace flour (GPF) addition in the enhancement of functional properties of savory crackers. Different levels of incorporation were tested (5%, 10% and 15% (w/w)). Analysis of physical properties, nutritional composition and sensory acceptability were conducted to evaluate the effect of GPF incorporation. GPF cracker stability throughout a four-week period was achieved with regard to firmness and color. These products presented distinctive and appealing colors, ranging from a violet (GPF of Touriga Nacional variety) to a brown hue (GPF of Arinto variety). Concerning nutritional composition, both crackers incorporated with 10% GPF of Arinto or Touriga Nacional varieties could be considered “high in fiber”, as per the Regulation (EC) No. 1924/2006, suggesting a functional food. GPF crackers demonstrated an overall great acceptance of this kind of innovative foods, with the majority indicating that they would certainly/probably buy them. Moreover, the cracker with 10% Arinto GPF achieved the most balanced and overall preference.

1 January 2025 in Biomedical and Biopharmaceutical Research
Verified
Journal Article
Open access
RCRaquel Carriço
Raquel Carriço
JMJoana Marcos
Joana Marcos
CBCátia Baptista
Cátia Baptista
VVVanessa Vasconcelos
Vanessa Vasconcelos
HBHelena Beato
Helena Beato
Inês BrandãoInês Brandão
Inês Brandão
As consumers become more health-conscious, they are increasingly seeking out foods that offer potential health benefits, such as yoghurts. To encourage more sustainable and healthy consumption habits, it is important to develop food products using local food ingredients. This study focused on fermented dairy products, namely by developing various formulations of Greek yoghurt using strawberry-tree fruit (Arbutus unedo L.) (STF) and peach (Prunus persica) puree, with no added sugar. Both peach and STF were sourced locally. A sensory analysis was performed to determine the preferred formulation, selecting either z1 (20% STF and 80% peach) or z2 (30% STF and 70% peach). After comparing the two, z1 emerged as the preferred formulation. For this formulation, physicochemical and microbiological analyses were conducted. A Greek yoghurt that incorporates peach and STF was developed while satisfying the requirements for “low-fat”, “low-saturated fat”, and “no added sugars” nutrition claims. These are all important features that align with the guidelines provided by the World Health Organization in promoting a healthy diet that encourages reduced fat and saturated fat intake, limited consumption of added sugars, and increased fibre content. To the best of our knowledge, this is the first time describing a Greek yoghurt containing STF purée.

1 March 2020 in Biomedical and Biopharmaceutical Research
Verified
Journal Article
Closed access
JMJoana Marcos
Joana Marcos
NTNelson Tavares
Nelson Tavares
CSCarla Sá
Carla Sá
Food choices for adopting a healthy lifestyle are influenced by a set of factors. Early adulthood and university entry are crucial for the development of eating habits that will be decisive in quality of life. In Portugal, there are few studies that assess the nutritional status of university students. The main objective of this study, as a pilot study, was to characterize the dietary habits of university students at Universidade Lusófona in Lisbon, Portugal. This cross-sectional descriptive study included university students, aged between 18 and 28 years old. Anthropometric data were collected, and body mass index was calculated. The dietary habits were assessed through a semi-quantitative food frequency questionnaire, administered directly. The average daily intake values were: energy, 2282.9 ± 954.0 kcal, 243.2 g of carbohydrates, 114.2 g of proteins, and 100.9 g of lipids. These values include a protein intake of 25.40%, 52.11% carbohydrate and 22.47% lipids. It was concluded that there is an increase in protein and lipid intake in samples from the university students evaluated.