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The concept of nature-based solutions (NBSs) has become increasingly popular among urban policymakers and planners to help them tackle the urban challenges arising from urban expansion and climate change. Stakeholders' involvement is a fundamental step, and stakeholders' perceptions and preferences can affect the development of NBS projects. This study aims to identify stakeholders' perceptions of the most critical urban challenges, the priority interventions, the preferred NBSs and the benefits of the NBSs, and to identify the determinants of these perceptions. A survey was administered to assess stakeholders' perceptions and views on implementing NBSs in two Portuguese cities with distinct urban, geographical, and socio-economic contexts. A binary logistic regression model was used to understand the determinants of the likelihood of the stakeholders’ answers. According to the stakeholders, climate change is one of the main concerns in the urban context. It is usually associated with the incidence of heatwaves and water scarcity. Additionally, stakeholders are concerned about the low quantity and poor management of green spaces (GSs). They believe that it will be necessary to increase the GS, to recover some degraded areas, and to increase mobility. The preferred NBSs were planting more urban trees, making green shaded areas, and rehabilitating riverbanks. The main expected benefits were benefits for leisure and relaxation, reductions in air temperature, purer air, and improvements in public health. The results showed mostly coherent connections between the main concerns/priorities of the stakeholders and the perceived NBS benefits; however, some stakeholders did not present coherent connections, indicating low awareness of the current policy for implementing NBSs to overcome existing and future urban challenges.
Vera Ferreira; Ana Paula Barreira; Luís Loures; Dulce Antunes; Thomas Panagopoulos. Stakeholders’ perceptions of appropriate nature-based solutions in the urban context. Journal of Environmental Management 2021, 298, 113502 .
AMA StyleVera Ferreira, Ana Paula Barreira, Luís Loures, Dulce Antunes, Thomas Panagopoulos. Stakeholders’ perceptions of appropriate nature-based solutions in the urban context. Journal of Environmental Management. 2021; 298 ():113502.
Chicago/Turabian StyleVera Ferreira; Ana Paula Barreira; Luís Loures; Dulce Antunes; Thomas Panagopoulos. 2021. "Stakeholders’ perceptions of appropriate nature-based solutions in the urban context." Journal of Environmental Management 298, no. : 113502.
Non-invasive techniques for automatic fruit classification are gaining importance in the global agro-industry as they allow for optimizing harvesting, storage, management, and distribution decisions. Visible, near infra-red (NIR) diffuse reflectance spectroscopy is one of the most employed techniques in such fruit classification. Typically, after the acquisition of a fruit reflectance spectrum the wavelength domain signal is preprocessed and a classifier is designed. Up to now, little or no work considered the problem of feature generation and selection of the reflectance spectrum. This work aims at filling this gap, by exploiting a feature engineering phase before the classifier. The usual approach where the classifier is fed directly with the reflectances measured at each wavelength is contrasted with the proposed division of the spectra into bands and their characterization in wavelength, frequency, and wavelength-frequency domains. Feature selection is also applied for optimizing efficiency, predictive accuracy, and for mitigating over-training. A total of 3050 Rocha pear samples from different origins and harvest years are considered. Statistical tests of hypotheses on classification results of soluble solids content - a predictor of both fruit sweetness and ripeness - show that the proposed preliminary phase of feature engineering outperforms the usual direct approach both in terms of accuracy and in the number of necessary features. Moreover, the method allows for the identification of features that are physical chemistry meaningful.
Mariana Daniel; Rui Guerra; António Brázio; Daniela Rodrigues; Ana Margarida Cavaco; Maria Dulce Antunes; José Valente de Oliveira. Feature discovery in NIR spectroscopy based Rocha pear classification. Expert Systems with Applications 2021, 177, 114949 .
AMA StyleMariana Daniel, Rui Guerra, António Brázio, Daniela Rodrigues, Ana Margarida Cavaco, Maria Dulce Antunes, José Valente de Oliveira. Feature discovery in NIR spectroscopy based Rocha pear classification. Expert Systems with Applications. 2021; 177 ():114949.
Chicago/Turabian StyleMariana Daniel; Rui Guerra; António Brázio; Daniela Rodrigues; Ana Margarida Cavaco; Maria Dulce Antunes; José Valente de Oliveira. 2021. "Feature discovery in NIR spectroscopy based Rocha pear classification." Expert Systems with Applications 177, no. : 114949.
The aim of this work was to study the potential of two halophytes for fresh salads. Sarcocornia perennis (SAR) and Salicornia ramosissima (SAL) plant tips were harvested in May and July, and stored at 4 °C for 14 days. At harvest, mineral analyses (Na, K, Mg, Ca, P, N, Fe, Zn, Cu, Pb and Cd), chlorophyll content, protein, β-carotene and ascorbic acid were performed. Color (CIELab), phenolics, antioxidant activity and microbial contamination were measured at harvest and after 14 days storage at 4 °C, and a taste panel evaluated the products. SAL had generally slightly higher values of vitamin C, phenols and carotenoids than SAR. In SAR after 14 days of storage, the levels of phenols and the antioxidant activity were higher than at harvest, both in May and July. The opposite was observed for SAL. In this case, only the antioxidant activity was higher after 14 days of storage. Microbial contamination was very low, not reaching even half of critical limits. Both halophytes had good nutritional value, being suitable for use as fresh salads which can be stored for up to 14 days at 4 °C. SAR seems to be a better source of antioxidants, Ca and Fe than SAL and has less general quality and nutritional value changes from harvest time through cold storage. Fresh tips of both halophytes showed better appearance and nutritional quality when harvested in the early season (May) than at the end of the season (July).
Maria Antunes; Custódia Gago; Adriana Guerreiro; Ana Sousa; Miriam Julião; Maria Miguel; Maria Faleiro; Thomas Panagopoulos. Nutritional Characterization and Storage Ability of Salicornia ramosissima and Sarcocornia perennis for Fresh Vegetable Salads. Horticulturae 2021, 7, 6 .
AMA StyleMaria Antunes, Custódia Gago, Adriana Guerreiro, Ana Sousa, Miriam Julião, Maria Miguel, Maria Faleiro, Thomas Panagopoulos. Nutritional Characterization and Storage Ability of Salicornia ramosissima and Sarcocornia perennis for Fresh Vegetable Salads. Horticulturae. 2021; 7 (1):6.
Chicago/Turabian StyleMaria Antunes; Custódia Gago; Adriana Guerreiro; Ana Sousa; Miriam Julião; Maria Miguel; Maria Faleiro; Thomas Panagopoulos. 2021. "Nutritional Characterization and Storage Ability of Salicornia ramosissima and Sarcocornia perennis for Fresh Vegetable Salads." Horticulturae 7, no. 1: 6.
The effect of coating ‘Rocha’ pears with alginate-based nanoemulsions enriched with lemongrass essential oil (LG) or citral (Cit) was investigated. Fruit were treated with the nanoemulsions: sodium alginate 2% (w/w) + citral 1% (w/w) (Cit1%); sodium alginate 2% (w/w) + citral 2% (w/w) (Cit2%); sodium alginate 2% (w/w) + lemongrass 1.25% (w/w) (LG1.25%); sodium alginate 2% (w/w) + lemongrass 2.5% (w/w) (LG2.5%). Then, fruit were stored at 0 °C and at 95% relative humidity, for six months. Fruit samples were taken after two, four and six months, and then placed at 22 °C. Upon removal and after 7 d shelf-life, fruit were evaluated for colour CIE (L*, h◦), firmness, soluble solids content (SSC), titratable acidity (TA), weight loss, electrolytic leakage, microbial growth, symptoms of superficial scald and internal browning. All nanoemulsions had droplets in the nano range
Custódia Gago; Rui Antão; Cristino Dores; Adriana Guerreiro; Maria Graça Miguel; Maria Leonor Faleiro; Ana Cristina Figueiredo; Maria Dulce Antunes. The Effect of Nanocoatings Enriched with Essential Oils on ‘Rocha’ Pear Long Storage. Foods 2020, 9, 240 .
AMA StyleCustódia Gago, Rui Antão, Cristino Dores, Adriana Guerreiro, Maria Graça Miguel, Maria Leonor Faleiro, Ana Cristina Figueiredo, Maria Dulce Antunes. The Effect of Nanocoatings Enriched with Essential Oils on ‘Rocha’ Pear Long Storage. Foods. 2020; 9 (2):240.
Chicago/Turabian StyleCustódia Gago; Rui Antão; Cristino Dores; Adriana Guerreiro; Maria Graça Miguel; Maria Leonor Faleiro; Ana Cristina Figueiredo; Maria Dulce Antunes. 2020. "The Effect of Nanocoatings Enriched with Essential Oils on ‘Rocha’ Pear Long Storage." Foods 9, no. 2: 240.
Cities are facing a broad range of social and environmental challenges due to the current pressure of global urbanization. Nature-based solutions aim to utilize green infrastructure to improve people’s health and wellbeing. The design of urban environments must embrace the individual ideals of citizens and stakeholders which can only be achieved if effective methods of communication, involvement, and feedback are ensured. Such a procedure creates trust during its implementation, helping to take ownership and stewardship of processes and sites. This systematic literature review explores the current state of the art regarding citizen and stakeholder participation in nature-based solutions (NBS). The search on the SCOPUS database identified 142 papers in total that met the inclusion criteria. The participation analysis was separated in two areas: (a) analysis of perceptions, preferences, and perspectives of citizens and stakeholders, and (b) analysis of the participation process, including challenges and opportunities, motivations, methods and frameworks, and collaborative governance. The results revealed that stakeholder and citizen participation or collaboration in nature-based solutions is increasingly recognized as promising; however, research in several related domains is still lacking.
Vera Ferreira; Ana Barreira; Luís Loures; Dulce Antunes; Thomas Panagopoulos. Stakeholders’ Engagement on Nature-Based Solutions: A Systematic Literature Review. Sustainability 2020, 12, 640 .
AMA StyleVera Ferreira, Ana Barreira, Luís Loures, Dulce Antunes, Thomas Panagopoulos. Stakeholders’ Engagement on Nature-Based Solutions: A Systematic Literature Review. Sustainability. 2020; 12 (2):640.
Chicago/Turabian StyleVera Ferreira; Ana Barreira; Luís Loures; Dulce Antunes; Thomas Panagopoulos. 2020. "Stakeholders’ Engagement on Nature-Based Solutions: A Systematic Literature Review." Sustainability 12, no. 2: 640.
In this paper we report a method to determine the soluble solids content (SSC) of ‘Rocha’ pear (Pyrus communis L. cv. Rocha) based on their short-wave NIR reflectance spectra (500–1100 nm) measured in conditions similar to those found in packinghouse fruit sorting facilities. We obtained 3300 reflectance spectra from pears acquired from different lots, producers and with diverse storage times and ripening stages. The macroscopic properties of the pears, such as size, temperature and SSC were measured under controlled laboratory conditions. For the spectral analysis, we implemented a computational pipeline that incorporates multiple pre-processing techniques including a feature selection procedure, various multivariate regression models and three different validation strategies. This benchmark allowed us to find the best model/preproccesing procedure for SSC prediction from our data. From the several calibration models tested, we have found that Support Vector Machines provides the best predictions metrics with an RMSEP of around 0.82 ∘ Brix and 1.09 ∘ Brix for internal and external validation strategies respectively. The latter validation was implemented to assess the prediction accuracy of this calibration method under more ‘real world-like’ conditions. We also show that incorporating information about the fruit temperature and size to the calibration models improves SSC predictability. Our results indicate that the methodology presented here could be implemented in existing packinghouse facilities for single fruit SSC characterization.
Dário Passos; Daniela Rodrigues; Ana Margarida Cavaco; Maria Dulce Antunes; Rui Guerra. Non-Destructive Soluble Solids Content Determination for ‘Rocha’ Pear Based on VIS-SWNIR Spectroscopy under ‘Real World’ Sorting Facility Conditions. Sensors 2019, 19, 5165 .
AMA StyleDário Passos, Daniela Rodrigues, Ana Margarida Cavaco, Maria Dulce Antunes, Rui Guerra. Non-Destructive Soluble Solids Content Determination for ‘Rocha’ Pear Based on VIS-SWNIR Spectroscopy under ‘Real World’ Sorting Facility Conditions. Sensors. 2019; 19 (23):5165.
Chicago/Turabian StyleDário Passos; Daniela Rodrigues; Ana Margarida Cavaco; Maria Dulce Antunes; Rui Guerra. 2019. "Non-Destructive Soluble Solids Content Determination for ‘Rocha’ Pear Based on VIS-SWNIR Spectroscopy under ‘Real World’ Sorting Facility Conditions." Sensors 19, no. 23: 5165.
To evaluate the antioxidant activity of fourteen essential oils (EOs) isolated from myrtle (Myrtus communis L.) collected at different regions of Algeria, seven different assays were carried out: ability for scavenging ABTS (2,2-azinobis(3-ethylbenzothiazoline)-6-sulfonic acid), DPPH (2,2-diphenyl-1-picrylhydrazyl), HO (hydroxyl), NO (nitric oxide) free radicals; preventing lipid peroxidation through the thiobarbituric reactive species method, for reducing ferric ions to ferrous ions and chelating activity. The antiproliferative capacity of the EOs on Caco-2 cells were also evaluated using the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) method. The results showed that the essential oils were mainly constituted by α-pinene, 1,8-cineole, limonene and linalool. The EOs at different concentrations showed moderate to poor antioxidant activity. The sample Mc_Lf_06 was the single one that presented higher antioxidant activity across the four assays (prevention of lipid peroxidation, ability for scavenging the ABTS, NO and hydroxyl radicals). The EOs Mc_Lf_06 and Mc_Lf_10 showed the best antiproliferative activity but only achieving 20 % inhibition after 96 h of incubation for all concentrations tested. Intriguing the sample Mc_Lf_07 that stimulated the proliferation of Caco-2 cells, particularly at lower concentrations (0.1 and 0.2 mg/mL).
Aicha Hennia; Saïd Nemmiche; Adriana Guerreiro; Maria Leonor Faleiro; Maria Dulce Antunes; Smail Aazza; Maria Graça Miguel. Antioxidant and Antiproliferative Activities of Myrtus communis L. Essential Oils from Different Algerian Regions. Journal of Essential Oil Bearing Plants 2019, 22, 1488 -1499.
AMA StyleAicha Hennia, Saïd Nemmiche, Adriana Guerreiro, Maria Leonor Faleiro, Maria Dulce Antunes, Smail Aazza, Maria Graça Miguel. Antioxidant and Antiproliferative Activities of Myrtus communis L. Essential Oils from Different Algerian Regions. Journal of Essential Oil Bearing Plants. 2019; 22 (6):1488-1499.
Chicago/Turabian StyleAicha Hennia; Saïd Nemmiche; Adriana Guerreiro; Maria Leonor Faleiro; Maria Dulce Antunes; Smail Aazza; Maria Graça Miguel. 2019. "Antioxidant and Antiproliferative Activities of Myrtus communis L. Essential Oils from Different Algerian Regions." Journal of Essential Oil Bearing Plants 22, no. 6: 1488-1499.
Thymus vulgaris (thyme) is an aromatic plant and its essential oil has been applied as antimicrobial and antioxidant due to the presence of phenolic compounds. However, after steam distillation, the deodorized plant material is rejected, despite the possible presence of bioactive compounds. Ethanolic thyme waste extract revealed the presence of benzoic acid, 4-hydroxybenzoic acid, ferulic acid, caffeic acid, and sinapic acid. This waste thyme extract had the capacity for preventing the formation of primary and secondary lipid oxidation products in emulsions O/W (oil in water), constituted by diverse proportions of wheat and almond oils, without interfering with the viscosity parameters, for 10 weeks, at 37 °C. The increasing proportion of almond oil (≥50%) in the emulsion increases its resistance to oxidation, which is improved with the presence of an optimal concentration of tested thyme waste extract (0.02% and 0.04%). The waste thyme extract can, therefore, be used as an antioxidant either in food or pharmaceutical emulsions O/W, replacing the synthetic antioxidants.
Soukaïna El-Guendouz; Smail Aazza; Susana Anahi Dandlen; Nessrine Majdoub; Badiaa Lyoussi; Sara Raposo; Maria Dulce Antunes; Vera Gomes; Maria Graça Miguel. Antioxidant Activity of Thyme Waste Extract in O/W Emulsions. Antioxidants 2019, 8, 243 .
AMA StyleSoukaïna El-Guendouz, Smail Aazza, Susana Anahi Dandlen, Nessrine Majdoub, Badiaa Lyoussi, Sara Raposo, Maria Dulce Antunes, Vera Gomes, Maria Graça Miguel. Antioxidant Activity of Thyme Waste Extract in O/W Emulsions. Antioxidants. 2019; 8 (8):243.
Chicago/Turabian StyleSoukaïna El-Guendouz; Smail Aazza; Susana Anahi Dandlen; Nessrine Majdoub; Badiaa Lyoussi; Sara Raposo; Maria Dulce Antunes; Vera Gomes; Maria Graça Miguel. 2019. "Antioxidant Activity of Thyme Waste Extract in O/W Emulsions." Antioxidants 8, no. 8: 243.
Edible coatings supplemented with essential oil components have been investigated to control spoilage microorganisms. In this study, the survival of Listeria monocytogenes and Salmonella enterica serovar Typhimurium on apples treated with edible coatings based on sodium alginate (2%) (ECs) and supplemented with essential oil components, namely eugenol (Eug) at 0.2% or in combination with 0.1% (v/v) of Eug and citral (Cit) at 0.15% was determined. Both bacterial pathogens were exposed on apples treated with ECs supplemented with Eug or Eug + Cit and challenged with gastrointestinal fluids and their survival was examined. Both pathogens were able to survive on the surface of ‘Bravo de Esmolfe’ apple. The use of ECs in fresh-cut fruits impaired the survival of both bacterial populations over 72 h at 4 °C. The exposure of the pathogens on apples with ECs supplemented with Eug and Cit and challenged with gastrointestinal fluids significantly reduced their survival. This study evidences that the use of alginate edible coating enriched with Eug or the combination of Eug and Cit can contribute to the safer consumption of minimally processed fruits.
Ana Isabel Vieira; Adriana Guerreiro; Maria Dulce Antunes; Maria Da Graça Miguel; Maria Leonor Faleiro. Edible Coatings Enriched with Essential Oils on Apples Impair the Survival of Bacterial Pathogens through a Simulated Gastrointestinal System. Foods 2019, 8, 57 .
AMA StyleAna Isabel Vieira, Adriana Guerreiro, Maria Dulce Antunes, Maria Da Graça Miguel, Maria Leonor Faleiro. Edible Coatings Enriched with Essential Oils on Apples Impair the Survival of Bacterial Pathogens through a Simulated Gastrointestinal System. Foods. 2019; 8 (2):57.
Chicago/Turabian StyleAna Isabel Vieira; Adriana Guerreiro; Maria Dulce Antunes; Maria Da Graça Miguel; Maria Leonor Faleiro. 2019. "Edible Coatings Enriched with Essential Oils on Apples Impair the Survival of Bacterial Pathogens through a Simulated Gastrointestinal System." Foods 8, no. 2: 57.
The ever-growing world population results in the ineluctable increase of food demand which translates in the augment of the global market of packaging materials. Hence, the concept of active packaging materializes as a technology to enhance the safety, quality and shelf-life of the packaged foods. Active packaging systems can contribute to the reduction of food waste by providing, apart from an inert barrier to external conditions, several functions associated with food preservation, namely absorbing/scavenging, releasing/emitting and removing properties, temperature, microbial and quality control. The purpose of this review is to present a concise (but wide-ranging) appraisal on the latest advances in active agents for active food packaging. Emphasis is placed on active functions such as antimicrobial and antioxidant activity, oxygen and ethylene scavenging, and carbon dioxide emitting. An effort was made to highlight representative articles that prompted research on active agents towards viable market solutions. Active packaging is a thriving field given its duality as barrier to external detrimental factors and active role in food preservation and quality. The use of natural active agents is a flourishing field due to the general concern towards natural-based additives. Nevertheless, research is still in its early stages with a long way to go in the design of innovative and economical active packaging materials containing appropriate active agents. The interaction between packaging, environment and food is the key challenge for achieving commercial translation.
Carla Vilela; Mia Kurek; Zvi Hayouka; Bettina Röcker; Selçuk Yildirim; Maria Dulce C. Antunes; Julie Nilsen-Nygaard; Marit Kvalvåg Pettersen; Carmen S.R. Freire. A concise guide to active agents for active food packaging. Trends in Food Science & Technology 2018, 80, 212 -222.
AMA StyleCarla Vilela, Mia Kurek, Zvi Hayouka, Bettina Röcker, Selçuk Yildirim, Maria Dulce C. Antunes, Julie Nilsen-Nygaard, Marit Kvalvåg Pettersen, Carmen S.R. Freire. A concise guide to active agents for active food packaging. Trends in Food Science & Technology. 2018; 80 ():212-222.
Chicago/Turabian StyleCarla Vilela; Mia Kurek; Zvi Hayouka; Bettina Röcker; Selçuk Yildirim; Maria Dulce C. Antunes; Julie Nilsen-Nygaard; Marit Kvalvåg Pettersen; Carmen S.R. Freire. 2018. "A concise guide to active agents for active food packaging." Trends in Food Science & Technology 80, no. : 212-222.
Background: Essential oils (EOs) have shown antimicrobial, antioxidant, and antiproliferative activity, which may, alone or in combination with other substances, potentially be used for the development of new drugs. However, their chemical variability, depending on the species, varieties, or geographical origin (among other factors) determines different bioactivities that need to be evaluated. Methods: The antioxidant activity of Corymbia citriodora and eight Eucalyptus species EOs was determined using two different methods: the scavenging ability of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS+•) and peroxyl free radicals or oxygen radical absorbance capacity (ORAC). Antibacterial activity was evaluated using the microorganisms Streptococcus pneumoniae (strains D39 and TIGR4), and Haemophilus influenza (strain DSM 9999). The essential oils’ minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) was assessed using a microdilution method. The antiproliferative activity was determined using the THP-1 cell line (human acute monocytic leukaemia) with methylthiazolyldiphenyl-tetrazolium bromide assay (MTT). Results: Corymbia citriodora and Eucalyptus viminalis EOs showed the highest ABTS and peroxyl free radical scavenging capacity. Eucalyptus globulus EO showed a high potential to treat Streptococcus pneumoniae infections. Haemophilus influenzae was the respiratory pathogen that showed the highest resistance to all EOs, including tea tree EO. After 96 h of incubation, at 25 μg/mL, Eucalyptus radiata and Eucalyptus viminalis EOs showed highest cytotoxic activity against the THP-1 cell line. Conclusions: Despite their specific bioactivities, no single EO showed simultaneously good antioxidant, antimicrobial, and antiproliferative activity.
Maria Graça Miguel; Custódia Gago; Maria Dulce Antunes; Soraia Lagoas; Maria Leonor Faleiro; Cristina Megías; Isabel Cortés-Giraldo; Javier Vioque; Ana Cristina Figueiredo. Antibacterial, Antioxidant, and Antiproliferative Activities of Corymbia citriodora and the Essential Oils of Eight Eucalyptus Species. Medicines 2018, 5, 61 .
AMA StyleMaria Graça Miguel, Custódia Gago, Maria Dulce Antunes, Soraia Lagoas, Maria Leonor Faleiro, Cristina Megías, Isabel Cortés-Giraldo, Javier Vioque, Ana Cristina Figueiredo. Antibacterial, Antioxidant, and Antiproliferative Activities of Corymbia citriodora and the Essential Oils of Eight Eucalyptus Species. Medicines. 2018; 5 (3):61.
Chicago/Turabian StyleMaria Graça Miguel; Custódia Gago; Maria Dulce Antunes; Soraia Lagoas; Maria Leonor Faleiro; Cristina Megías; Isabel Cortés-Giraldo; Javier Vioque; Ana Cristina Figueiredo. 2018. "Antibacterial, Antioxidant, and Antiproliferative Activities of Corymbia citriodora and the Essential Oils of Eight Eucalyptus Species." Medicines 5, no. 3: 61.
Água-mel is a honey-based traditional product typically produced in southern Portugal. The evolution of some parameters during its production using two distinct containers (aluminium and stainless steel with a water cooling system) and two heating sources (gas heating and electricity) were evaluated. All parameters, except moisture, increased over time, reaching a ‘plateau’ after 8 h of heating. Moisture, free acidity, HMF (hydroxymethylfurfural), colour, melanoidins, phenols and glucose depended on the producer and procedure for obtaining água-mel. Kinetic parameters and correlation coefficients were determined. In general, changes in parameters during água-mel production followed zero- and/or first-order kinetics, depending on the producer and heating system.
Maria Graça Miguel; Smail Aazza; Maria Dulce Antunes; Maria Leonor Faleiro. Changes in the chemical parameters during the production of água-mel from Portugal. CyTA - Journal of Food 2018, 16, 972 -979.
AMA StyleMaria Graça Miguel, Smail Aazza, Maria Dulce Antunes, Maria Leonor Faleiro. Changes in the chemical parameters during the production of água-mel from Portugal. CyTA - Journal of Food. 2018; 16 (1):972-979.
Chicago/Turabian StyleMaria Graça Miguel; Smail Aazza; Maria Dulce Antunes; Maria Leonor Faleiro. 2018. "Changes in the chemical parameters during the production of água-mel from Portugal." CyTA - Journal of Food 16, no. 1: 972-979.
Adriana Guerreiro; Custódia Gago; Maria Leonor Faleiro; Maria G.C. Miguel; Maria Dulce Antunes. The effect of edible coatings on the nutritional quality of ‘Bravo de Esmolfe’ fresh-cut apple through shelf-life. LWT - Food Science and Technology 2017, 75, 210 -219.
AMA StyleAdriana Guerreiro, Custódia Gago, Maria Leonor Faleiro, Maria G.C. Miguel, Maria Dulce Antunes. The effect of edible coatings on the nutritional quality of ‘Bravo de Esmolfe’ fresh-cut apple through shelf-life. LWT - Food Science and Technology. 2017; 75 ():210-219.
Chicago/Turabian StyleAdriana Guerreiro; Custódia Gago; Maria Leonor Faleiro; Maria G.C. Miguel; Maria Dulce Antunes. 2017. "The effect of edible coatings on the nutritional quality of ‘Bravo de Esmolfe’ fresh-cut apple through shelf-life." LWT - Food Science and Technology 75, no. : 210-219.
Custódia Gago; Adriana Guerreiro; Graça Miguel; Thomas Panagopoulos; Manuela Silva; Maria D.C. Antunes. Effect of Calcium chloride and 1-MCP (Smartfresh™) postharvest treatment on ‘Golden Delicious’ apple cold storage physiological disorders. Scientia Horticulturae 2016, 211, 440 -448.
AMA StyleCustódia Gago, Adriana Guerreiro, Graça Miguel, Thomas Panagopoulos, Manuela Silva, Maria D.C. Antunes. Effect of Calcium chloride and 1-MCP (Smartfresh™) postharvest treatment on ‘Golden Delicious’ apple cold storage physiological disorders. Scientia Horticulturae. 2016; 211 ():440-448.
Chicago/Turabian StyleCustódia Gago; Adriana Guerreiro; Graça Miguel; Thomas Panagopoulos; Manuela Silva; Maria D.C. Antunes. 2016. "Effect of Calcium chloride and 1-MCP (Smartfresh™) postharvest treatment on ‘Golden Delicious’ apple cold storage physiological disorders." Scientia Horticulturae 211, no. : 440-448.
Due to the high perishability of raspberry fruit, this work was undertaken to study the effect of alginate and pectin based edible coatings enriched with essential oils components on their storage ability. Four formulations of edible coatings, selected in a previous work, were used: sodium alginate (AL) at 2% + eugenol (Eug) 0.1%, AL 2% + citral (Cit) 0.15%, Pectin (PE) 1% + Eug 0.1% and PE 1% + Cit 0.15% + Eug 0.1%. At 0, 5, 10 and 15 d, samples were taken to perform analysis of colour, firmness, soluble solids content (SSC), weight loss, microbial growth, phenolic compounds (total phenolics, flavonoids, anthocyanins), sugars, organic acids, antioxidant activity (TEAC and ORAC), acetaldehyde, CO2 production and sensory evaluation. Cytotoxicity of the edible coatings was also evaluated on THP-1 and Caco-2 cells. Results of this experiment showed that the edible coatings were not cytotoxic and generally did not significantly affect nutritional quality parameters. They were efficient in controlling microbial food spoilage. Acceptance by consumers of the coated raspberries was good up to 14 d, while control fruit were acceptable only till 7 d. The edible coating that best preserved quality was PE 1% + Cit 0.15% + Eug 0.1%.
Adriana Guerreiro; Custódia Gago; Maria G.C. Miguel; Maria Leonor Faleiro; Maria D.C. Antunes. The influence of edible coatings enriched with citral and eugenol on the raspberry storage ability, nutritional and sensory quality. Food Packaging and Shelf Life 2016, 9, 20 -28.
AMA StyleAdriana Guerreiro, Custódia Gago, Maria G.C. Miguel, Maria Leonor Faleiro, Maria D.C. Antunes. The influence of edible coatings enriched with citral and eugenol on the raspberry storage ability, nutritional and sensory quality. Food Packaging and Shelf Life. 2016; 9 ():20-28.
Chicago/Turabian StyleAdriana Guerreiro; Custódia Gago; Maria G.C. Miguel; Maria Leonor Faleiro; Maria D.C. Antunes. 2016. "The influence of edible coatings enriched with citral and eugenol on the raspberry storage ability, nutritional and sensory quality." Food Packaging and Shelf Life 9, no. : 20-28.
Antioxidants have been considered essential for preventing cell damage by scavenging deleterious free radicals. The consumption of antioxidant-rich plants is associated with a reduced risk of some chronic diseases. This study evaluates the antioxidant and acetylcholinesterase inhibition activities of aqueous extracts obtained from different parts of Diplotaxis simplex and Diplotaxis harra from Tunisia. The study also aimed to investigate the action of simulated gastrointestinal juice on antioxidant activities of both extracts. The total phenolic, flavone and flavonol, and flavanone and dihydroflavonol contents were determined by Folin–Ciocalteau, aluminum chloride and 2,4-dinitrophenylhydrazine colorimetric methods, respectively. The metal ion chelating activity, acetylcholinesterase inhibition capacity, and free radical scavenging potential of the extracts towards ABTS (2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid), DPPH (2,2-diphenyl-1-picrylhydrazyl), hydroxyl, superoxide and nitric oxide were also evaluated. The action of simulated gastro-intestinal fluids on the flavone and flavonol content and total antioxidant activity of the flower extracts was surveyed. Extracts from the seeds and flowers of D. simplex and D. harra displayed the highest amounts of phenols (2691.7 and 2694.5 mg Caffeic Acid Equivalent (CAE)/100 mg; 3433.4 and 2647.2 mg CAE/100 mg, respectively) and flavonols/flavones (2144.4 and 2061.1 mg Rutin Equivalent (RE)/100 g; 1922.6 and 1461.1 mg RE/100 g, respectively). The flower and seed extracts exhibited the highest rates of antioxidant and acetylcholinesterase inhibition activities. A decrease in the flavonoid content and antioxidant activity was observed after extract exposure to simulated saliva. Antioxidant and acetylcholinesterase inhibition activities were noted to depend on plant species and plant parts. In vitro gastrointestinal digestion is useful in assessing the bio-accessibility of compounds with biological activities from food. The simulated gastrointestinal fluids influenced the flavonoid concentration and antioxidant activity.
Nada Bahloul; Sana Bellili; Smail Aazza; Ameur Cherif; Maria Leonor Faleiro; Maria Dulce Antunes; Maria Graça Miguel; Wissem Mnif. Aqueous Extracts from Tunisian Diplotaxis: Phenol Content, Antioxidant and Anti-Acetylcholinesterase Activities, and Impact of Exposure to Simulated Gastrointestinal Fluids. Antioxidants 2016, 5, 12 .
AMA StyleNada Bahloul, Sana Bellili, Smail Aazza, Ameur Cherif, Maria Leonor Faleiro, Maria Dulce Antunes, Maria Graça Miguel, Wissem Mnif. Aqueous Extracts from Tunisian Diplotaxis: Phenol Content, Antioxidant and Anti-Acetylcholinesterase Activities, and Impact of Exposure to Simulated Gastrointestinal Fluids. Antioxidants. 2016; 5 (2):12.
Chicago/Turabian StyleNada Bahloul; Sana Bellili; Smail Aazza; Ameur Cherif; Maria Leonor Faleiro; Maria Dulce Antunes; Maria Graça Miguel; Wissem Mnif. 2016. "Aqueous Extracts from Tunisian Diplotaxis: Phenol Content, Antioxidant and Anti-Acetylcholinesterase Activities, and Impact of Exposure to Simulated Gastrointestinal Fluids." Antioxidants 5, no. 2: 12.
Edible coatings based on sodium alginate (AL) and pectin (PE) at 1% and 2%(w/v) enriched with eugenol (Eug) and citral (Cit) at minimum inhibitory concentrations (MIC) (0.10% and 0.15%) and double MIC were used to preserve the quality of fresh-cut apples ‘Bravo de Esmolfe’. Samples were taken, through 14 day at 4 °C, for analysis of colour CIE(L*h°C*), firmness, °Brix, weight loss, antioxidant activity (TEAC), microbial growth and taste panels. With those quality characteristics, three groups were formed by the principal component and hierarchical cluster analysis, for each coating base (AL or PE). Based on, for each quality parameter measured, the mean closest value to the one at harvest for colour, higher value for firmness, °Brix and TEAC, and lower value for weight loss and microbial spoilage, the best group was selected for AL and PE. From each group, two edible coatings with the highest scores in overall acceptability were selected for fresh-cut apples: AL2% + Eug 0.1%, AL2% + Cit 0.15% + Eug 0.1%, PE 2% + Cit 0.15% and PE 2% + Eug 0.2%.
Adriana C. Guerreiro; Custódia M. L. Gago; Maria Leonor Faleiro; Maria G. C. Miguel; Maria D. C. Antunes. Edible coatings enriched with essential oils for extending the shelf-life of ‘Bravo de Esmolfe’ fresh-cut apples. International Journal of Food Science & Technology 2015, 51, 87 -95.
AMA StyleAdriana C. Guerreiro, Custódia M. L. Gago, Maria Leonor Faleiro, Maria G. C. Miguel, Maria D. C. Antunes. Edible coatings enriched with essential oils for extending the shelf-life of ‘Bravo de Esmolfe’ fresh-cut apples. International Journal of Food Science & Technology. 2015; 51 (1):87-95.
Chicago/Turabian StyleAdriana C. Guerreiro; Custódia M. L. Gago; Maria Leonor Faleiro; Maria G. C. Miguel; Maria D. C. Antunes. 2015. "Edible coatings enriched with essential oils for extending the shelf-life of ‘Bravo de Esmolfe’ fresh-cut apples." International Journal of Food Science & Technology 51, no. 1: 87-95.
Água-mel (honey–water) is a typical honey-based product produced by the Portuguese beekeepers, particularly in southern Portugal. Água-mel was characterized by mineral content and volatiles contents. Mineral content evaluation was performed based on a random sampling of 14 samples from a total of 16 samples provided by local producers. Mineral content showed that potassium predominated in água-mel samples (1270–4105 mg/kg). The concentration of aluminium in one sample was tenfold higher (5.8 mg/kg) than in the remaining samples (0.3–0.6 mg/kg). Água-mel volatiles were isolated by hydrodistillation and analysed by gas chromatography (GC) and gas chromatography–mass spectrometry (GC–MS) from a subset of eight samples. Cluster analysis showed two poorly correlated clusters (S corr < 0.3). Cluster I only sample was dominated by trans-β-ocimene (19 %), γ-terpinene (15 %) and 2-furfural (9 %). Cluster II that included the remaining seven samples showed two moderately correlated subclusters (S corr < 0.5). The six samples with high correlation from subcluster IIa were dominated by 2-furfural (18–41 %) and benzene acetaldehyde (12–39 %). n-Nonadecane (14 %), n-heneicosane and 2-furfural (both 13 %) were the main components of subcluster IIb sample. Although the presence of some volatile compounds can help in the correlation between água-mel and honey botanical source, the final product varies largely according to the preparation process even for the same producer, in different years. Água-mel detailed characterization may assist in bringing added value to this typical Portuguese honey-based product.
Maria Graça Miguel; Smail Aazza; Maria Dulce Antunes; Maria Leonor Faleiro; José G. Barroso; Luis G. Pedro; A. Cristina Figueiredo. Mineral and volatile composition of água-mel from Portugal. European Food Research and Technology 2015, 242, 171 -178.
AMA StyleMaria Graça Miguel, Smail Aazza, Maria Dulce Antunes, Maria Leonor Faleiro, José G. Barroso, Luis G. Pedro, A. Cristina Figueiredo. Mineral and volatile composition of água-mel from Portugal. European Food Research and Technology. 2015; 242 (2):171-178.
Chicago/Turabian StyleMaria Graça Miguel; Smail Aazza; Maria Dulce Antunes; Maria Leonor Faleiro; José G. Barroso; Luis G. Pedro; A. Cristina Figueiredo. 2015. "Mineral and volatile composition of água-mel from Portugal." European Food Research and Technology 242, no. 2: 171-178.
Effects of dip treatments on nutritional quality preservation during the shelf life of fresh-cut tomato (Licopersicum esculentum Mill.) cv. Eufrates were investigated. Fresh-cut tomatoes were dipped in solutions of 2% ascorbic acid, citric acid, and calcium lactate for 2 min, then stored at 4°C for 20 days. Color (L*, a*, and b*), firmness, °Brix, phenolics, ascorbic acid content, antioxidant activity (DPPH), and sugars were measured during storage. Pathogen development was monitored, and a sensory evaluation was performed. Ascorbic acid was better in maintaining firmness. No treatments significantly affected °Brix, color, or sugars. Ascorbic acid maintained a higher antioxidant capacity, phenolics, and ascorbic acid content, and was better at reducing bacterial growth, while citric acid treatment was better at prevention of yeast and molds proliferation. Fresh-cut tomatoes showed good quality after 10 days of shelf life, except for flavor with the calcium lactate treatment. Ascorbic acid treatment better preserved the general and nutritional quality parameters.
Maria D. C. Antunes; Daniela Rodrigues; Vasilios Pantazis; Ana Cavaco; Anastasios Siomos; Maria Graça Miguel. Nutritional quality changes of fresh-cut tomato during shelf life. Food Science and Biotechnology 2013, 22, 1 -8.
AMA StyleMaria D. C. Antunes, Daniela Rodrigues, Vasilios Pantazis, Ana Cavaco, Anastasios Siomos, Maria Graça Miguel. Nutritional quality changes of fresh-cut tomato during shelf life. Food Science and Biotechnology. 2013; 22 (5):1-8.
Chicago/Turabian StyleMaria D. C. Antunes; Daniela Rodrigues; Vasilios Pantazis; Ana Cavaco; Anastasios Siomos; Maria Graça Miguel. 2013. "Nutritional quality changes of fresh-cut tomato during shelf life." Food Science and Biotechnology 22, no. 5: 1-8.
The strawberry tree (Arbutus unedo L) fruits are used in small quantities for fresh consumption despite their excellent flavor. The aim of this work was to evaluate the storage ability of strawberry tree fruits for fresh consumption. Harvested fruits were stored in polystyrene foam trays covered with two film types: linear low density polyethylene of 10 mu m thickness (PPL) or polyethylene film perforated with holes of 10 mm diameter spaced 50 mm (PP). Through 15 days storage at 0,3 and 6 degrees C, fruits were analyzed for quality parameters. The strawberry tree fruits presented relevant qualitative properties and were appreciated by panelists. Color parameters (L*, h degrees, C*) had higher decrease at 3 and 6 degrees C than at 0 degrees C. The degrees Brix almost did not change and firmness decreased mainly in the first 4 days storage. Ethanol and weight loss increased with temperature mostly from 3 to 6 degrees C. Strawberry tree fruits are a good source of ascorbic acid, glucose, fructose, anthocyanins and antioxidant activity. Those properties are maintained through 15 days storage at 0 degrees C followed by 3 degrees C. Film covers showed no significant differences between them. The temperature of 0 degrees C was the best for preservation of fruit quality through 15 days shelf-life. (C) 2013 Elsevier B.V. All rights reserved
Adriana Guerreiro; Custódia Gago; Maria G.C. Miguel; Maria Dulce Antunes. The effect of temperature and film covers on the storage ability of Arbutus unedo L. fresh fruit. Scientia Horticulturae 2013, 159, 96 -102.
AMA StyleAdriana Guerreiro, Custódia Gago, Maria G.C. Miguel, Maria Dulce Antunes. The effect of temperature and film covers on the storage ability of Arbutus unedo L. fresh fruit. Scientia Horticulturae. 2013; 159 ():96-102.
Chicago/Turabian StyleAdriana Guerreiro; Custódia Gago; Maria G.C. Miguel; Maria Dulce Antunes. 2013. "The effect of temperature and film covers on the storage ability of Arbutus unedo L. fresh fruit." Scientia Horticulturae 159, no. : 96-102.