Publications by authors named "Andreia P Oliveira"

Rice bran is a valuable by-product of rice milling, prized for its nutritional value and health benefits. This study investigates the antidiabetic properties of rice bran from fifteen commercially available Thai rice cultivars (six brown, four red and five purple). Bran samples were initially screened on their antioxidant potential and ability to inhibit α-glucosidase, as well as on γ-oryzanol levels, total phenolic and total flavonoid contents.

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  • Gelidium sesquipedale waste, often discarded after agar extraction, is rich in valuable nutrients and bioactive compounds.
  • A subcritical water extraction (SWE) method at high temperature and pressure was found to produce a superior extract compared to traditional ethanol extraction, offering a better nutritional profile and antioxidant properties.
  • The SWE extract is safe for human consumption and has potential applications in food and nutraceutical industries, highlighting its value in waste valorization.
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  • Onion skin waste (OSW), a byproduct of onion processing, can be transformed into valuable bioactive compounds using subcritical water extraction (SWE) methods.
  • This study found that SWE produced a phenolic-rich extract with significant health benefits, including various phenolic compounds and nutrients, which showed strong antioxidant properties and the ability to inhibit certain enzymes linked to diabetes.
  • The findings suggest that utilizing OSW through SWE offers a sustainable approach to create functional food ingredients without harmful solvents, supporting circular economy initiatives.
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The inflammatory response is a vital mechanism for repairing damage induced by aberrant health states or external insults; however, persistent activation can be linked to numerous chronic diseases. The nuclear factor kappa β (NF-κB) inflammatory pathway and its associated mediators have emerged as critical targets for therapeutic interventions aimed at modulating inflammation, necessitating ongoing drug development. Previous studies have reported the inhibitory effect of a hydroethanol extract derived from Parinari excelsa Sabine (Chrysobalanaceae) on tumour necrosis factor-alpha (TNF-α), but the phytoconstituents and mechanisms of action remained elusive.

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(MS) (CC) (TP) and (SV) are used in Morocco to treat hypertension. Our aim was to characterize the composition and vasoreactivity of extracts of MS, CC, TP and SV. The chemical compositions of aqueous extracts of MS, SV and TP, and of a hydromethanolic extract of CC, were identified by HPLC-DAD.

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Among several extracts from species from Guinea-Bissauan flora, the hydroethanol extract obtained from the leaves of gingerbread plum (Neocarya macrophylla (Sabine) Prance ex F. White.) revealed to be one of the most cytotoxic towards human gastric AGS carcinoma cells.

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Ethnopharmacological Relevance: According to ethnobotanical surveys, Cassia sieberiana DC. (1825) is a particularly reputed species in African folk Medicine, namely due to the application of its leaves and roots for the treatment of diseases and symptomatology that appear to be related with an inflammatory background. In contrast with the roots of the plant, the leaves remain to be investigated, which prompted us to further detail mechanisms underlying their anti-inflammatory properties, by using in vitro models of disease.

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  • Several species of Homalium, particularly H. bhamoense, are traditionally used in Asia for skin injuries, but their bioactive properties have not been previously studied.
  • A methanol extract from H. bhamoense trunk bark exhibited concentration-dependent inhibition of inflammatory mediators, including hyaluronidase and 5-lipoxygenase, and successfully reduced elevated levels of interleukin 6 in lab-stimulated macrophages.
  • The analysis identified ellagic acid as the primary phenolic compound in the extract, suggesting it may contribute to the observed anti-inflammatory effects, although there are indications of potential skin toxicity.
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is a plant used in traditional medicine for several cardiovascular disorders, namely hypertension, but there is no scientific evidence able to provide a molecular basis for its claimed antihypertensive effects. After a preliminary screen of extracts obtained from sequential extraction of aerial parts, effects of the methanolic fraction (MFCE) on changes in perfusion pressure of isolated rat mesenteric vascular bed (MVB) and in rat cardiac fibroblasts proliferation were investigated, gathering information on the mechanisms involved in endothelium-dependent effects and their dependence on a pro-proliferative stimulus. The HPLC-DAD determination of the phenolics content of MFCE revealed the presence of 22 phenolic compounds.

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Ethnopharmacological Relevance: Ethnopharmacological surveys on Guinea-Bissauan flora reveal that several species are used to treat or ameliorate the symptomatology of conditions with an inflammatory background. As such, extracts obtained from a series of plants recorded in those surveys were screened for their anti-inflammatory properties, a hydroethanolic extract obtained from the leaves of Xylopia aethiopica (Dunal) A. Rich, (Annonaceae), used on the treatment of headache, muscular pain and rheumatic pain, scoring positively and being further investigated.

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Predominantly spread in West Tropical Africa, the shrub (Lam.) DC. is known because of its medicinal properties, the leaves being used in the treatment of skin diseases.

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Centaurium erythraea Rafn is a food flavouring used in both food and beverage industries. Despite the existence of some works on this species, only few focus their attention on its common form of consumption (infusion). Thus, we intended to explore the chemical composition and the biological properties of infusions from C.

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Ficus exasperata Vahl, commonly known as sandpaper, is a terrestrial Afro-tropical tree used in popular medicine. Despite the existence of some works on the biological activities of this species, its chemical composition is still poorly known. The aim of this study was to extend the knowledge on the phytochemistry and biological properties of this species.

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Objective: Learn the perceptions of nursing professionals of a university hospital regarding the interactive process with nursing management practicum students.

Methods: A qualitative, exploratory, descriptive study was conducted by means of 11 semi-structured interviews with nurses, nursing technicians and nursing aides in medical-surgical units. The information, collected between December 2013 and January 2014, was submitted to a thematic analysis and discussed according to Pichon-Rivière.

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Studies involving jackfruit tree (Artocarpus heterophyllus Lam.) focus on its fruit. Nevertheless a considerable part of jackfruit weight is represented by its seeds.

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The need of new anti-inflammatory drugs has led to the search for safer and more potent molecules in distinct sources, such as natural products. This work aimed to explore the anti-inflammatory potential of aqueous extracts from two herbal teas (Annona muricata L. and Jasminum grandiflorum L.

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The exploitation of marine organisms for human nutritional and pharmaceutical purposes has revealed important chemical prototypes for the discovery of new drugs, stimulating compounds isolation and syntheses of new related compounds with biomedical application. Nowadays, it is well known that inflammatory processes are involved in many diseases and the interest in the search for marine natural products with anti-inflammatory potential has been increasing. The genus Aplysia belongs to the class Gastropoda, having a wide geographical distribution and including several species, commonly known as sea hares.

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Introduction: Piper betle L. is a widely distributed plant in the tropical and subtropical regions, its leaves being largely consumed as a masticator and mouth freshener.

Objective: The purposes of this work were to characterise the phenolic profile of this species and to improve knowledge of its anti-cholinesterase properties.

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Objective: To analyze the contradictions and ambiguities which permeate nurses' motivation for exercising leadership in management positions, in a university hospital.

Method: This study has a qualitative approach and is exploratory and descriptive, and used a total of 33 semi-structured interviews which were submitted to thematic analysis.

Results: The information converged on five categories: Motivation to take on a management position; The view of nursing managers on the exercising of leadership; The emblematic aspect of working with people; Leadership in nursing--mediatory and conciliatory; Time: a dilemma between managing and caring.

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Beverages are an ideal format to offer nutrients, specific health-promoting functionality, and desirable sensory attributes to consumers. Taking into account previous research on Spergularia rubra (L.) J.

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Latex is a sticky emulsion that exudes upon damage from specialized canals from several plants. It contains several biologically active compounds, such as phytosterols, fatty acids, and amino acids. In plants, these compounds are involved in the interaction between plants, insects, and the environment.

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Ficus species possess latex-like material within their vasculatures, affording protection and self-healing from physical attacks. In this work, metabolite profiling was performed on Ficus carica latex. Volatiles profile was determined by HS-SPME/GC-IT-MS, with 34 compounds being identified, distributed by distinct chemical classes: 5 aldehydes, 7 alcohols, 1 ketone, 9 monoterpenes, 9 sesquiterpenes and 3 other compounds.

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Ficus carica L. is one of the earliest cultivated fruit trees. In this work, metabolite profiling was performed on the leaves, pulps and peels of two Portuguese white varieties of F.

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Organic acid profiles of 36 Cydonia oblonga Miller leaf samples, from three different geographical origins of northern (Bragança and Carrazeda de Ansiães) and central Portugal (Covilhã), harvested in three collection months (June, August and October of 2006), were determined by HPLC/UV (214nm). Quince leaves presented a common organic acid profile, composed of six constituents: oxalic, citric, malic, quinic, shikimic and fumaric acids. C.

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Synopsis of recent research by authors named "Andreia P Oliveira"

  • - Andreia P Oliveira's research primarily focuses on the valorization of agricultural and marine waste products through innovative extraction techniques, such as subcritical water extraction (SWE), to extract bioactive compounds and examine their chemical composition and biological activity.
  • - Recent studies emphasize the anti-inflammatory properties and potential therapeutic applications of natural compounds obtained from various plant sources, including algae, onion skin, and traditional herbal remedies, providing insights into their mechanisms of action and underlying phytochemistry.
  • - Oliveira's work also includes investigating the cytotoxic effects of certain plant extracts on cancer cells, as well as the pharmacological potential of natural products in treating conditions related to inflammation and cardiovascular diseases, aligning with the principles of sustainable resource use and biorefinery.