Ana Vinha - Profile on Academia.edu (original) (raw)
Papers by Ana Vinha
Egitania Sciencia
A mudança dos hábitos e costumes da sociedade moderna que tem vindo a acontecer nas últimas décad... more A mudança dos hábitos e costumes da sociedade moderna que tem vindo a acontecer nas últimas décadas, conduziu a uma alteração dos padrões alimentares e, consequentemente, a consumidores mais exigentes e atentos aos benefícios que cada género alimentício aporta. Como resposta a esta situação, a indústria alimentar reforçou a sua política de investigação, surgindo um novo tipo de alimentos, denominados alimentos funcionais, os quais são caracterizados como alimentos comuns, integrados na dieta e capazes de produzir benefícios específicos para a saúde. As substâncias biologicamente ativas presentes nos alimentos funcionais podem ser classificadas em: probióticos e prebióticos, alimentos sulfurados e azotados, pigmentos naturais e vitaminas, compostos fenólicos, ácidos gordos polinsaturados e fibras alimentares. Este trabalho teve como objetivo realizar uma revisão bibliográfica fundamentada que sustente a importância dos alimentos funcionais como géneros alimentícios integrantes da die...
Currently, dietary health natural supplements have increasingly used in the prevention and treatm... more Currently, dietary health natural supplements have increasingly used in the prevention and treatment of chronic disorders. Moreover, deficiencies of macro and micronutrients, (vitamins and minerals), and non-nutrients (polyphenolics) have mainly cause several illnesses, especially in children and women worldwide. World organizations have focused great efforts to address these shortcomings and improve the health of the populations. Grape must, or commonly known as grape must juice, becomes a valued ingredient with nutritional and chemical qualities already recognized. Four portuguese grapevine must (Touriga Nacional; Touriga Franca; Tinta Roriz and Vinha Velha) were analysed and results of phytochemical screening revealed that Touriga Nacional grape must contains a number of medicinally active secondary metabolites, with highest total phenolic and flavonoids contents (325.2 mg GAE/L and 218.3 mg CE/L, respectively). In contrast, Tinta Roriz exhibited the lowest values (144.4 mg GAE/L and 18.3 mg CE/L, respectively). Natural pigments were also investigated, with significantly different levels of anthocyanins in all four portuguese grapevine must: Touriga Nacional (23%), Touriga Franca (63%), Tinta Roriz (70%), and Vinha Velha (19%). Apart from the sensory attributes that grape must can impart in commercial flours, the presence of non-nutrient compounds (polyphenols) is an asset in the development of new functional foods, namely in flours for infant formulations, preteens, teens, adult and athletes.
Nativa, 2021
O fósforo (P) é o nutriente mais limitante ao cultivo nos solos tropicais, que, geralmente, apres... more O fósforo (P) é o nutriente mais limitante ao cultivo nos solos tropicais, que, geralmente, apresentam alta capacidade de adsorção de P. Alguns atributos químicos e físicos do solo como o teor de argila, pH, CTC efetiva e matéria orgânica influenciam na dinâmica de adsorção. O objetivo deste estudo foi avaliar o processo de adsorção do fósforo em um Latossolo Vermelho Amarelo (LVA) e um Neossolo Quartzarênico (RQ) da região de transição Cerrado-Amazônia, e avaliar os atributos dos solos que influenciam na dinâmica de adsorção do P. Os ensaios de sorção foram realizados pelo método “Batch” ou em batelada e à partir dos dados obtidos foram construídas curvas obtendo a equação linearizada de Langmuir, com as quais foram determinados os valores de capacidade máxima de adsorção de P (CMAP), a constante relacionada com a energia de ligação (KL) e o fator capacidade de P máximo (FCPmáx). Houve diferença na CMAP, KL e FCPmáx dos solos estudados, sendo que os maiores valores foram encontrado...
South Florida Journal of Health, Aug 11, 2022
The technology of food irradiation is gaining more attention around the world. This method is rec... more The technology of food irradiation is gaining more attention around the world. This method is recognized by using ionising radiation in order to control foodborne pathogens, reduce microbial load and insect infestation, inhibit the germination of root crops, extend the durable life of perishable produce, and reduce plant-derived allergens. According to the International Atomic Energy Agency (IAEA), more than 50 countries have approved the use of irradiation for about 50 different types of food, and 33 are using the technology commercially. Despite the fact that irradiation has been used for decades for food disinfection that satisfies quarantine requirements in trade, health concerns over the consumption of irradiated food continue to attract attention. This low-cost method has the advantage that the organoleptic properties of irradiated foods are not altered, allowing, however, to increase their bioactivity and nutritional quality. This review focuses on the advantages of irradiation applied to foods of plant origin. With proper application, irradiation can be an effective means of eliminating and/or reducing microbial and insect infestations along with the foodborne diseases they induce, thereby improving the safety of many foods as well as extending shelf life.
Egitania Sciencia
A sustentabilidade é um conceito complexo que se pode resumir na noção de desenvolvimento económi... more A sustentabilidade é um conceito complexo que se pode resumir na noção de desenvolvimento económico e social, sem provocar grandes danos ao ambiente e aos recursos naturais. Há, atualmente, inúmeros casos de aproveitamento e valorização de materiais que no passado eram rejeitados pelas indústrias agroalimentares e que devem servir de exemplo para todos os processos de produção alimentar, potenciando outras indústrias, como a indústria farmacêutica, nomeadamente na área da tecnologia de desenvolvimento de produtos dermocosméticos. O presente trabalho teve como objetivo o estudo e caracterização química dos compostos extratáveis das diferentes partes do fruto abacate, nomeadamente, polpa, pele e semente, variedade “Hass” de produção nacional. Os resultados obtidos indicam, por meio de uma abordagem fitoquímica in vitro, a presença de diferentes metabolitos secundários com propriedades bioativas nos diversos constituintes do fruto (polpa, pele e semente), tendo em vista o interesse na ...
Cosmetics
Elsevier eBooks, 2018
The cosmetic industry is a prosperous global business. According to the Cosmetics Europe—The Pers... more The cosmetic industry is a prosperous global business. According to the Cosmetics Europe—The Personal Care Association, 450 million of Europeans daily use a wide variety of cosmetic products, such as soap, shampoo, hair conditioner, toothpaste, deodorant, shaving cream, skincare, perfume, or make-up. Innovation is one of the basic principles in this field. Over the past 20 years, the innovation in cosmetic industry is enormous, resulting in a wide range of products to protect and moisturize skin as well as to combat inflammation and age signals. Also, consumers are more concerned about their appearance, trying to accept the new society paradigms. On the other hand, the demand for natural cosmetics is stronger than ever, being now widely considered a serious threat to the worldwide economy and society. These new concepts had improved the use of natural extracts as active ingredients in cosmetics, leading to the reuse of old-style active ingredients obtained from natural sources, as well as to new green compounds obtained considering sustainable principles.info:eu-repo/semantics/publishedVersio
Acta Scientific Nutritional Health, Jul 1, 2023
Carotenoids are versatile isoprenoids that have been related to a number of health benefits. Thei... more Carotenoids are versatile isoprenoids that have been related to a number of health benefits. Their presence in foods, dietary intake and circulating levels have been associated with a reduced incidence of obesity, diabetes, certain types of cancer, and even lower total mortality. In this review, several considerations for their safe and sustainable use in foods mostly intended for health promotion are provided. Specifically, information about biosynthesis, sources, ingestion, and factors affecting their bioavailability is summarized. Furthermore, their health-promoting actions and their importance in public health regarding their contribution to reduce the risk of several deseases are synthesized. Also, in this review is emphasized carotenoids benefits as potential strategy for nutraceuticals, pharmaceutical and cosmetic industrial applications.This study also addressed the significant obstacles as well as the synergistic factors that interfere with the bioavailability and consequent biological functions of carotenoids. Finally, this review enhances the use of carotenoids as functional compounds in different industries.
Medicina: Aspectos Epidemiológicos, Clínicos e Estratégicos de Tratamento, 2021
Egitania Sciencia
O interesse pelo reaproveitamento das diferentes partes dos frutos e vegetais tem vindo a aumenta... more O interesse pelo reaproveitamento das diferentes partes dos frutos e vegetais tem vindo a aumentar, não só com o intuito de promover a sustentabilidade ambiental, como também pelas demais propriedades benéficas, que vários autores já identificaram. A concentração em compostos bioativos das sementes da papaia, que são quase sempre desperdiçadas, levou ao estudo de usos alternativos das mesmas. Neste âmbito, quantificou-se a concentração de compostos não-nutritivos das sementes da Carica papaya L., nomeadamente fenólicos e flavonoides totais, avaliando-se também a atividade antioxidante das mesmas. Os resultados obtidos permitiram concluir que a concentração em compostos bioativos é influenciada pelo tipo de solvente extrator utilizado (água ou etanol). O extrato aquoso evidenciou maior concentração de flavonoides, enquanto o extrato etanólico mostrou maior quantidade de compostos fenólicos. A atividade antioxidante foi avaliada, usando-se o ácido ascórbico como controlo. Apesar de a ...
Egitania Sciencia
Lichia (Litchi chinensis) e rambutã (Nephelium lappaceum) são frutas exóticas provenientes da Ási... more Lichia (Litchi chinensis) e rambutã (Nephelium lappaceum) são frutas exóticas provenientes da Ásia, recentemente introduzidas na Europa. Com o aumento da produção mundial destes frutos, muitos subprodutos são desperdiçados durante o processamento industrial, incluindo-se as cascas não edíveis dos mesmos. Para além do aporte nutricional reconhecido, pensa-se que os compostos bioativos presentes nestes subprodutos sejam os responsáveis por diversas atividades biológicas, tais como, antioxidante, anti-inflamatória, antineoplásica, anti-glicémica, antimicrobiana, entre outras. O objetivo deste estudo visou determinar e comparar o aporte nutricional e conteúdo dos compostos bioativos, nomeadamente, fenólicos e flavonoides totais, das cascas não edíveis destes frutos no sentido de as valorizar e fomentar o seu uso em possíveis aplicações na indústria alimentar, farmacêutica e cosmética. Pela análise nutricional das cascas estudadas foram determinados os teores de humidade, cinzas, proteín...
Egitania Sciencia
O nervo lingual é um dos nervos mais importantes na cavidade oral e com frequência é lesado duran... more O nervo lingual é um dos nervos mais importantes na cavidade oral e com frequência é lesado durante alguns procedimentos de cirurgia oral. Devido à sua localização e possíveis variações anatómicas, alguns atos cirúrgicos que englobam a sua região podem tornar-se complexos e decorrer em complicações intra e pós-operatórias, nomeadamente lesões nervosas. Entre as diversas causas dessas lesões citam-se técnicas anestésicas incorretas, traumas de tecido duro e mole, sobretudo do retalho lingual, e reabilitações fixas implanto-suportadas. Este trabalho tem como principal objetivo ajudar os Médicos Dentistas no esclarecimento de como evitar e/ou resolver a maioria dessas complicações. A partir de uma pesquisa bibliográfica exaustiva, este trabalho foca aspetos como a frequência da ocorrência e grau de severidade das lesões do nervo lingual bem como formas mais comuns de as tratar. As modificações neurosensoriais consequentes de complicações relacionadas com tratamentos odontológicos são u...
European Journal of Medicinal Plants, 2012
Hexane, chloroform, ethyl acetate and methanolic extracts from leaves and stem-bark of Rhamnus pr... more Hexane, chloroform, ethyl acetate and methanolic extracts from leaves and stem-bark of Rhamnus prinoides were evaluated for their antioxidant activity by DPPH radical scavenging assay. The leaves extracts showed scavenging activity ranging from 03.33±0.89 to 55.03±3.40 µg mL-1 while the stem-bark extracts showed relatively strong scavenging activity ranging from 03.65±1.02 to 59.55±2.27 µg mL-1. The IC 50 values of R. prinoides hexane leaves extract (RPHELS), R. prinoides chloroform leaves extract (RPCHLS), R. prinoides ethyl acetate leaves extract (RPEALS), R. prinoides methanolic leaves extract (RPMELS), R. prinoides hexane stem-bark extract (RPHESB), R. prinoides chloroform stem-bark extract (RPCHSB), R. prinoides ethyl acetate stem-bark extract (RPEASB) and R. prinoides methanolic stembark extract (RPMESB) were found to be >3000, >3000, >3000, 950.42, ~1500, 710.50, ~1000 and 902.78 µg mL-1 , respectively. The positive control ascorbic acid showed an IC 50 value of <200 µg mL-1. From this study, we concluded that the extracts from R. prinoides showed promising antioxidant activity. R. prinoides finds therapeutic applications in the traditional medicine. Further research is required to commercialize products from this plant.
It was studied the chemical composition, antioxidant, antibacterial and antifungal properties of ... more It was studied the chemical composition, antioxidant, antibacterial and antifungal properties of the essential oil obtained from the Cymbopogon citratus of Angolan origin. Its major constituents analyzed by GC-MS were α-citral (40.55%), β-citral (28.26%), myrcene (10.50%) and geraniol (3.37%). The essential oil antioxidant capacity was statistically identical to that of synthetic antioxidants (DPPH IC50 of 41.7 μg/ml) and superior to that of extracts obtained from fresh leaves of the plant (DPPH IC50 of 55.7 μg/ml). The oil also demonstrated to possess high antibacterial activity even against multidrug resistant strains of Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Klebsiella pneumoniae and antifungal activity against Candida albicans and Non-Candida albicans, Candida parapsilosis and Candida tropicalis. The results of this study, in conjunction with already published data on the properties of other Cymbopogon citratus oils, provide evidence that it coul...
Journal of Agricultural Science, 2013
This study intended to evaluate the influence of different postharvest cooling conditions in the ... more This study intended to evaluate the influence of different postharvest cooling conditions in the physicochemical, antioxidant activity and microbiological contamination of tomato cultivars namely: Cereja, Chucha, Rama and Redondo. Pink fruits were kept for 15 days under three different storage temperatures (6ºC, 12ºC and 25ºC) during which their weight loss, total soluble solids, pH, color, titrable acidity, lycopene and ascorbic acid contents, total phenolics and antioxidant activity were evaluated every three days. Counts of colony forming units of coliform bacteria, yeasts and molds and the presence of Escherichia coli, were determined before and after 15 days of storage. All studied parameters revealed that temperature and storage duration caused statistically significant differences in nutritional values of every cultivar. It was observed an increase in the lycopene concentration and antioxidant activity with temperature and storage duration. The phenolic and ascorbic acid contents showed a slight increase during storage at every temperature. Microbial contamination was only found in cultivars that grew in direct contact with the soil (Chucha and Redondo) and bacterial population increased exponentially with storage temperature. Our results indicate that the ideal temperature to maintain optimal physiological, biochemical and microbiological profiles of the cultivars studied is 12ºC and that the cv. Rama fruit is the most suited for consumption in natura.
Food Chemistry, 2005
The phenolic compounds present in 29 samples of olive fruits were analysed by reversed-phase HPLC... more The phenolic compounds present in 29 samples of olive fruits were analysed by reversed-phase HPLC/DAD and/or HPLC-DAD/ ESI-MS/MS. All samples were collected during the normal picking period for olive oil production, in north and central Portugal, and were obtained from 18 different olive cultivars. Two different extraction methods were necessary for the complete quantification of phenolic compounds, a methanolic extraction and an extraction which included a solid-phase extraction (SPE) cleaning step. The analyses showed that all samples presented a similar profile, which included at least six identified phenolic compounds: hydroxytyrosol, luteolin 7-O-glucoside, oleuropein, rutin, apigenin 7-O-glucoside and luteolin. Several samples also contained 5-Ocaffeoylquinic acid, verbascoside, quercetin 3-O-rhamnoside, cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside. In all samples, hydroxytyrosol and oleuropein were the major compounds identified while, in general, rutin and luteolin 7-Oglucoside were the two main flavonoids. The influences of maturation index, nature of the cultivar and geographical origin are discussed.
Prime Archives in Agricultural Research
The economic charges and health implications of food spoilage and food waste handling are increas... more The economic charges and health implications of food spoilage and food waste handling are increasing. Contamination of food sources by different sources of contaminants remains a major public health concern. In the last decades, researches have focused on developing safer natural products and innovations to meet consumers' acceptance as alternatives to synthetic food preservatives. Many recent novel preservative techniques and applications of both natural and synthetic origin continue to proliferate in food and chemical industries. In particular, some essential oils of plant origin are potent food preservatives and are thus attractive alternatives to synthetic preservatives. For the reasons mentioned above, this studied aimed evaluate the chemical composition, antioxidant, antibacterial and antifungal properties of the essential oil obtained from the Cymbopogon citratus of Angolan origin. Its major constituents analyzed by GC-MS were α-citral (40.55%), β-citral (28.26%), myrcene (10.50%) and geraniol (3.37%). The essential oil antioxidant capacity was statistically identical to that of synthetic antioxidants (DPPH IC 50 of 41.7 μg/ml) and superior to that of extracts obtained from fresh leaves of the plant (DPPH IC50 of 55.7 μg/ml). The oil also demonstrated high antibacterial activity even against multidrug resistant strains of Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Klebsiella pneumoniae and antifungal activity against Candida albicans and Non-Candida albicans, Candida parapsilosis and Candida tropicalis.
Phytotherapeutic Activities of Six Plant Infusions: Chemical Constituents and Antioxidant Activity
Technological Innovation in Pharmaceutical Research Vol. 4
Suplementos de cálcio: quem e como
Egitania Sciencia
A mudança dos hábitos e costumes da sociedade moderna que tem vindo a acontecer nas últimas décad... more A mudança dos hábitos e costumes da sociedade moderna que tem vindo a acontecer nas últimas décadas, conduziu a uma alteração dos padrões alimentares e, consequentemente, a consumidores mais exigentes e atentos aos benefícios que cada género alimentício aporta. Como resposta a esta situação, a indústria alimentar reforçou a sua política de investigação, surgindo um novo tipo de alimentos, denominados alimentos funcionais, os quais são caracterizados como alimentos comuns, integrados na dieta e capazes de produzir benefícios específicos para a saúde. As substâncias biologicamente ativas presentes nos alimentos funcionais podem ser classificadas em: probióticos e prebióticos, alimentos sulfurados e azotados, pigmentos naturais e vitaminas, compostos fenólicos, ácidos gordos polinsaturados e fibras alimentares. Este trabalho teve como objetivo realizar uma revisão bibliográfica fundamentada que sustente a importância dos alimentos funcionais como géneros alimentícios integrantes da die...
Currently, dietary health natural supplements have increasingly used in the prevention and treatm... more Currently, dietary health natural supplements have increasingly used in the prevention and treatment of chronic disorders. Moreover, deficiencies of macro and micronutrients, (vitamins and minerals), and non-nutrients (polyphenolics) have mainly cause several illnesses, especially in children and women worldwide. World organizations have focused great efforts to address these shortcomings and improve the health of the populations. Grape must, or commonly known as grape must juice, becomes a valued ingredient with nutritional and chemical qualities already recognized. Four portuguese grapevine must (Touriga Nacional; Touriga Franca; Tinta Roriz and Vinha Velha) were analysed and results of phytochemical screening revealed that Touriga Nacional grape must contains a number of medicinally active secondary metabolites, with highest total phenolic and flavonoids contents (325.2 mg GAE/L and 218.3 mg CE/L, respectively). In contrast, Tinta Roriz exhibited the lowest values (144.4 mg GAE/L and 18.3 mg CE/L, respectively). Natural pigments were also investigated, with significantly different levels of anthocyanins in all four portuguese grapevine must: Touriga Nacional (23%), Touriga Franca (63%), Tinta Roriz (70%), and Vinha Velha (19%). Apart from the sensory attributes that grape must can impart in commercial flours, the presence of non-nutrient compounds (polyphenols) is an asset in the development of new functional foods, namely in flours for infant formulations, preteens, teens, adult and athletes.
Nativa, 2021
O fósforo (P) é o nutriente mais limitante ao cultivo nos solos tropicais, que, geralmente, apres... more O fósforo (P) é o nutriente mais limitante ao cultivo nos solos tropicais, que, geralmente, apresentam alta capacidade de adsorção de P. Alguns atributos químicos e físicos do solo como o teor de argila, pH, CTC efetiva e matéria orgânica influenciam na dinâmica de adsorção. O objetivo deste estudo foi avaliar o processo de adsorção do fósforo em um Latossolo Vermelho Amarelo (LVA) e um Neossolo Quartzarênico (RQ) da região de transição Cerrado-Amazônia, e avaliar os atributos dos solos que influenciam na dinâmica de adsorção do P. Os ensaios de sorção foram realizados pelo método “Batch” ou em batelada e à partir dos dados obtidos foram construídas curvas obtendo a equação linearizada de Langmuir, com as quais foram determinados os valores de capacidade máxima de adsorção de P (CMAP), a constante relacionada com a energia de ligação (KL) e o fator capacidade de P máximo (FCPmáx). Houve diferença na CMAP, KL e FCPmáx dos solos estudados, sendo que os maiores valores foram encontrado...
South Florida Journal of Health, Aug 11, 2022
The technology of food irradiation is gaining more attention around the world. This method is rec... more The technology of food irradiation is gaining more attention around the world. This method is recognized by using ionising radiation in order to control foodborne pathogens, reduce microbial load and insect infestation, inhibit the germination of root crops, extend the durable life of perishable produce, and reduce plant-derived allergens. According to the International Atomic Energy Agency (IAEA), more than 50 countries have approved the use of irradiation for about 50 different types of food, and 33 are using the technology commercially. Despite the fact that irradiation has been used for decades for food disinfection that satisfies quarantine requirements in trade, health concerns over the consumption of irradiated food continue to attract attention. This low-cost method has the advantage that the organoleptic properties of irradiated foods are not altered, allowing, however, to increase their bioactivity and nutritional quality. This review focuses on the advantages of irradiation applied to foods of plant origin. With proper application, irradiation can be an effective means of eliminating and/or reducing microbial and insect infestations along with the foodborne diseases they induce, thereby improving the safety of many foods as well as extending shelf life.
Egitania Sciencia
A sustentabilidade é um conceito complexo que se pode resumir na noção de desenvolvimento económi... more A sustentabilidade é um conceito complexo que se pode resumir na noção de desenvolvimento económico e social, sem provocar grandes danos ao ambiente e aos recursos naturais. Há, atualmente, inúmeros casos de aproveitamento e valorização de materiais que no passado eram rejeitados pelas indústrias agroalimentares e que devem servir de exemplo para todos os processos de produção alimentar, potenciando outras indústrias, como a indústria farmacêutica, nomeadamente na área da tecnologia de desenvolvimento de produtos dermocosméticos. O presente trabalho teve como objetivo o estudo e caracterização química dos compostos extratáveis das diferentes partes do fruto abacate, nomeadamente, polpa, pele e semente, variedade “Hass” de produção nacional. Os resultados obtidos indicam, por meio de uma abordagem fitoquímica in vitro, a presença de diferentes metabolitos secundários com propriedades bioativas nos diversos constituintes do fruto (polpa, pele e semente), tendo em vista o interesse na ...
Cosmetics
Elsevier eBooks, 2018
The cosmetic industry is a prosperous global business. According to the Cosmetics Europe—The Pers... more The cosmetic industry is a prosperous global business. According to the Cosmetics Europe—The Personal Care Association, 450 million of Europeans daily use a wide variety of cosmetic products, such as soap, shampoo, hair conditioner, toothpaste, deodorant, shaving cream, skincare, perfume, or make-up. Innovation is one of the basic principles in this field. Over the past 20 years, the innovation in cosmetic industry is enormous, resulting in a wide range of products to protect and moisturize skin as well as to combat inflammation and age signals. Also, consumers are more concerned about their appearance, trying to accept the new society paradigms. On the other hand, the demand for natural cosmetics is stronger than ever, being now widely considered a serious threat to the worldwide economy and society. These new concepts had improved the use of natural extracts as active ingredients in cosmetics, leading to the reuse of old-style active ingredients obtained from natural sources, as well as to new green compounds obtained considering sustainable principles.info:eu-repo/semantics/publishedVersio
Acta Scientific Nutritional Health, Jul 1, 2023
Carotenoids are versatile isoprenoids that have been related to a number of health benefits. Thei... more Carotenoids are versatile isoprenoids that have been related to a number of health benefits. Their presence in foods, dietary intake and circulating levels have been associated with a reduced incidence of obesity, diabetes, certain types of cancer, and even lower total mortality. In this review, several considerations for their safe and sustainable use in foods mostly intended for health promotion are provided. Specifically, information about biosynthesis, sources, ingestion, and factors affecting their bioavailability is summarized. Furthermore, their health-promoting actions and their importance in public health regarding their contribution to reduce the risk of several deseases are synthesized. Also, in this review is emphasized carotenoids benefits as potential strategy for nutraceuticals, pharmaceutical and cosmetic industrial applications.This study also addressed the significant obstacles as well as the synergistic factors that interfere with the bioavailability and consequent biological functions of carotenoids. Finally, this review enhances the use of carotenoids as functional compounds in different industries.
Medicina: Aspectos Epidemiológicos, Clínicos e Estratégicos de Tratamento, 2021
Egitania Sciencia
O interesse pelo reaproveitamento das diferentes partes dos frutos e vegetais tem vindo a aumenta... more O interesse pelo reaproveitamento das diferentes partes dos frutos e vegetais tem vindo a aumentar, não só com o intuito de promover a sustentabilidade ambiental, como também pelas demais propriedades benéficas, que vários autores já identificaram. A concentração em compostos bioativos das sementes da papaia, que são quase sempre desperdiçadas, levou ao estudo de usos alternativos das mesmas. Neste âmbito, quantificou-se a concentração de compostos não-nutritivos das sementes da Carica papaya L., nomeadamente fenólicos e flavonoides totais, avaliando-se também a atividade antioxidante das mesmas. Os resultados obtidos permitiram concluir que a concentração em compostos bioativos é influenciada pelo tipo de solvente extrator utilizado (água ou etanol). O extrato aquoso evidenciou maior concentração de flavonoides, enquanto o extrato etanólico mostrou maior quantidade de compostos fenólicos. A atividade antioxidante foi avaliada, usando-se o ácido ascórbico como controlo. Apesar de a ...
Egitania Sciencia
Lichia (Litchi chinensis) e rambutã (Nephelium lappaceum) são frutas exóticas provenientes da Ási... more Lichia (Litchi chinensis) e rambutã (Nephelium lappaceum) são frutas exóticas provenientes da Ásia, recentemente introduzidas na Europa. Com o aumento da produção mundial destes frutos, muitos subprodutos são desperdiçados durante o processamento industrial, incluindo-se as cascas não edíveis dos mesmos. Para além do aporte nutricional reconhecido, pensa-se que os compostos bioativos presentes nestes subprodutos sejam os responsáveis por diversas atividades biológicas, tais como, antioxidante, anti-inflamatória, antineoplásica, anti-glicémica, antimicrobiana, entre outras. O objetivo deste estudo visou determinar e comparar o aporte nutricional e conteúdo dos compostos bioativos, nomeadamente, fenólicos e flavonoides totais, das cascas não edíveis destes frutos no sentido de as valorizar e fomentar o seu uso em possíveis aplicações na indústria alimentar, farmacêutica e cosmética. Pela análise nutricional das cascas estudadas foram determinados os teores de humidade, cinzas, proteín...
Egitania Sciencia
O nervo lingual é um dos nervos mais importantes na cavidade oral e com frequência é lesado duran... more O nervo lingual é um dos nervos mais importantes na cavidade oral e com frequência é lesado durante alguns procedimentos de cirurgia oral. Devido à sua localização e possíveis variações anatómicas, alguns atos cirúrgicos que englobam a sua região podem tornar-se complexos e decorrer em complicações intra e pós-operatórias, nomeadamente lesões nervosas. Entre as diversas causas dessas lesões citam-se técnicas anestésicas incorretas, traumas de tecido duro e mole, sobretudo do retalho lingual, e reabilitações fixas implanto-suportadas. Este trabalho tem como principal objetivo ajudar os Médicos Dentistas no esclarecimento de como evitar e/ou resolver a maioria dessas complicações. A partir de uma pesquisa bibliográfica exaustiva, este trabalho foca aspetos como a frequência da ocorrência e grau de severidade das lesões do nervo lingual bem como formas mais comuns de as tratar. As modificações neurosensoriais consequentes de complicações relacionadas com tratamentos odontológicos são u...
European Journal of Medicinal Plants, 2012
Hexane, chloroform, ethyl acetate and methanolic extracts from leaves and stem-bark of Rhamnus pr... more Hexane, chloroform, ethyl acetate and methanolic extracts from leaves and stem-bark of Rhamnus prinoides were evaluated for their antioxidant activity by DPPH radical scavenging assay. The leaves extracts showed scavenging activity ranging from 03.33±0.89 to 55.03±3.40 µg mL-1 while the stem-bark extracts showed relatively strong scavenging activity ranging from 03.65±1.02 to 59.55±2.27 µg mL-1. The IC 50 values of R. prinoides hexane leaves extract (RPHELS), R. prinoides chloroform leaves extract (RPCHLS), R. prinoides ethyl acetate leaves extract (RPEALS), R. prinoides methanolic leaves extract (RPMELS), R. prinoides hexane stem-bark extract (RPHESB), R. prinoides chloroform stem-bark extract (RPCHSB), R. prinoides ethyl acetate stem-bark extract (RPEASB) and R. prinoides methanolic stembark extract (RPMESB) were found to be >3000, >3000, >3000, 950.42, ~1500, 710.50, ~1000 and 902.78 µg mL-1 , respectively. The positive control ascorbic acid showed an IC 50 value of <200 µg mL-1. From this study, we concluded that the extracts from R. prinoides showed promising antioxidant activity. R. prinoides finds therapeutic applications in the traditional medicine. Further research is required to commercialize products from this plant.
It was studied the chemical composition, antioxidant, antibacterial and antifungal properties of ... more It was studied the chemical composition, antioxidant, antibacterial and antifungal properties of the essential oil obtained from the Cymbopogon citratus of Angolan origin. Its major constituents analyzed by GC-MS were α-citral (40.55%), β-citral (28.26%), myrcene (10.50%) and geraniol (3.37%). The essential oil antioxidant capacity was statistically identical to that of synthetic antioxidants (DPPH IC50 of 41.7 μg/ml) and superior to that of extracts obtained from fresh leaves of the plant (DPPH IC50 of 55.7 μg/ml). The oil also demonstrated to possess high antibacterial activity even against multidrug resistant strains of Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Klebsiella pneumoniae and antifungal activity against Candida albicans and Non-Candida albicans, Candida parapsilosis and Candida tropicalis. The results of this study, in conjunction with already published data on the properties of other Cymbopogon citratus oils, provide evidence that it coul...
Journal of Agricultural Science, 2013
This study intended to evaluate the influence of different postharvest cooling conditions in the ... more This study intended to evaluate the influence of different postharvest cooling conditions in the physicochemical, antioxidant activity and microbiological contamination of tomato cultivars namely: Cereja, Chucha, Rama and Redondo. Pink fruits were kept for 15 days under three different storage temperatures (6ºC, 12ºC and 25ºC) during which their weight loss, total soluble solids, pH, color, titrable acidity, lycopene and ascorbic acid contents, total phenolics and antioxidant activity were evaluated every three days. Counts of colony forming units of coliform bacteria, yeasts and molds and the presence of Escherichia coli, were determined before and after 15 days of storage. All studied parameters revealed that temperature and storage duration caused statistically significant differences in nutritional values of every cultivar. It was observed an increase in the lycopene concentration and antioxidant activity with temperature and storage duration. The phenolic and ascorbic acid contents showed a slight increase during storage at every temperature. Microbial contamination was only found in cultivars that grew in direct contact with the soil (Chucha and Redondo) and bacterial population increased exponentially with storage temperature. Our results indicate that the ideal temperature to maintain optimal physiological, biochemical and microbiological profiles of the cultivars studied is 12ºC and that the cv. Rama fruit is the most suited for consumption in natura.
Food Chemistry, 2005
The phenolic compounds present in 29 samples of olive fruits were analysed by reversed-phase HPLC... more The phenolic compounds present in 29 samples of olive fruits were analysed by reversed-phase HPLC/DAD and/or HPLC-DAD/ ESI-MS/MS. All samples were collected during the normal picking period for olive oil production, in north and central Portugal, and were obtained from 18 different olive cultivars. Two different extraction methods were necessary for the complete quantification of phenolic compounds, a methanolic extraction and an extraction which included a solid-phase extraction (SPE) cleaning step. The analyses showed that all samples presented a similar profile, which included at least six identified phenolic compounds: hydroxytyrosol, luteolin 7-O-glucoside, oleuropein, rutin, apigenin 7-O-glucoside and luteolin. Several samples also contained 5-Ocaffeoylquinic acid, verbascoside, quercetin 3-O-rhamnoside, cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside. In all samples, hydroxytyrosol and oleuropein were the major compounds identified while, in general, rutin and luteolin 7-Oglucoside were the two main flavonoids. The influences of maturation index, nature of the cultivar and geographical origin are discussed.
Prime Archives in Agricultural Research
The economic charges and health implications of food spoilage and food waste handling are increas... more The economic charges and health implications of food spoilage and food waste handling are increasing. Contamination of food sources by different sources of contaminants remains a major public health concern. In the last decades, researches have focused on developing safer natural products and innovations to meet consumers' acceptance as alternatives to synthetic food preservatives. Many recent novel preservative techniques and applications of both natural and synthetic origin continue to proliferate in food and chemical industries. In particular, some essential oils of plant origin are potent food preservatives and are thus attractive alternatives to synthetic preservatives. For the reasons mentioned above, this studied aimed evaluate the chemical composition, antioxidant, antibacterial and antifungal properties of the essential oil obtained from the Cymbopogon citratus of Angolan origin. Its major constituents analyzed by GC-MS were α-citral (40.55%), β-citral (28.26%), myrcene (10.50%) and geraniol (3.37%). The essential oil antioxidant capacity was statistically identical to that of synthetic antioxidants (DPPH IC 50 of 41.7 μg/ml) and superior to that of extracts obtained from fresh leaves of the plant (DPPH IC50 of 55.7 μg/ml). The oil also demonstrated high antibacterial activity even against multidrug resistant strains of Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Klebsiella pneumoniae and antifungal activity against Candida albicans and Non-Candida albicans, Candida parapsilosis and Candida tropicalis.
Phytotherapeutic Activities of Six Plant Infusions: Chemical Constituents and Antioxidant Activity
Technological Innovation in Pharmaceutical Research Vol. 4
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