Rui Pedro Soares de Oliveira
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View article: The Influence of Manufacturing Parameters and Heat Treatments on the Properties of AlSi10Mg Alloy Produced Using L-PBF
The Influence of Manufacturing Parameters and Heat Treatments on the Properties of AlSi10Mg Alloy Produced Using L-PBF Open
AlSi10Mg has been one of the most studied and employed aluminum alloys for additive manufacturing via laser powder-bed fusion (L-PBF). The optimization of manufacturing parameters is important for reducing internal defects, including poros…
View article: Tecnologia Educacional Multidisciplinar para a Educação das Relações Etnicorraciais
Tecnologia Educacional Multidisciplinar para a Educação das Relações Etnicorraciais Open
The Multidisciplinary Educational Technology (TE) “Inspiring Black Women” was created by students of the Specialization Course in Afro-Brazilian and Indigenous Knowledge and Practices in the Amazon at Federal Institute of Pará - Campus Tuc…
Cell Wall-Mediated Antifungal Activity of the Aqueous Extract of Hedera helix L. Leaves Against Diplodia corticola Open
Background/Objectives: Cork oak forests have been declining due to fungal pathogens such as Diplodia corticola. However, the preventive fungicides against this fungus have restricted use due to the deleterious effects on human health and t…
Biofunctional Textiles: Antioxidant and Antibacterial Finishings of Cotton with Propolis and Honey Open
The growing activity in the textile industry has been demanding the search for new and innovative technologies to meet consumers’ needs regarding more sustainable and ecological processes, with functionality receiving more attention. Bee p…
Further Insights on Honey and Propolis from Gerês (Portugal) and Their Bioactivities: Unraveling the Impact of Beehive Relocation Open
Propolis, a bee product, is known for its variability of chemical and bioactive profiles. However, Portuguese propolis from Gerês, normally obtained by mixing propolis from three places—Bugalho, Felgueiras and Toutelo—has shown similar che…
Antifungal and Antioomycete Activities of a Curcuma longa L. Hydroethanolic Extract Rich in Bisabolene Sesquiterpenoids Open
Curcuma longa, known for its anti-inflammatory, antioxidant, and antimicrobial properties, has been a staple in traditional medicine for centuries. In the pursuit of natural alternatives to synthetic preservatives, the extracts of C. longa…
View article: Phytoconstituents and Ergosterol Biosynthesis-Targeting Antimicrobial Activity of Nutmeg (Myristica fragans Houtt.) against Phytopathogens
Phytoconstituents and Ergosterol Biosynthesis-Targeting Antimicrobial Activity of Nutmeg (Myristica fragans Houtt.) against Phytopathogens Open
In recent years, nutmeg (Myristica fragans Houtt.) has attracted considerable attention in the field of phytochemistry due to its diverse array of bioactive compounds. However, the potential application of nutmeg as a biorational for crop …
2,4,5-Triaminopyrimidines as blue fluorescent probes for cell viability monitoring: synthesis, photophysical properties, and microscopy applications Open
Novel and efficient synthesis of 2,4,5-triaminopyrimidines featuring blue-cyan emission whose biological and computational evaluation highlights cell viability monitoring potential.
Evaluation of biotechnological processing through solid-state fermentation of oilseed cakes on extracts bioactive potential Open
Oilseed cakes (OC) are natural sources of lignocellulosic biomass, produced every year in large amounts. In addition to their main applications as animal feed, plant or soil fertilizer, and compost, they present enormous potential for bein…
Chemical Constituents and Antimicrobial Activity of a Ganoderma lucidum (Curtis.) P. Karst. Aqueous Ammonia Extract Open
Mushroom extracts have shown potential as a source of new antimicrobial agents. This study investigates the chemical profile of an aqueous ammonia extract obtained from the carpophores of Ganoderma lucidum, which grows on Quercus ilex tree…
Silene uniflora Extracts for Strawberry Postharvest Protection Open
Halophytes are gaining considerable attention due to their applications in saline agriculture, phytoremediation, medicine, and secondary metabolite production. This study investigated the bioactive components present in Silene uniflora (se…
Antibacterial and antioxidant activities of <i>Streptomyces</i> sp. strain FR7 isolated from forest soil Open
Actinomycetes produce secondary metabolites with many bioactivities such as antimicrobial, which can be useful as alternatives against resistant bacterial strains. Therefore, the screening of new habitats is likely to provide new strains w…
Antigenotoxic properties of the halophyte Polygonum maritimum L. highlight its potential to mitigate oxidative stress-related damage Open
Long-term exposure to dietary xenobiotics can induce oxidative stress in the gastrointestinal tract, possibly causing DNA damage and contributing to the initiation of carcinogenesis. Halophytes are exposed to constant abiotic stresses, whi…
Antifungal Activity of Plant Waste Extracts against Phytopathogenic Fungi: Allium sativum Peels Extract as a Promising Product Targeting the Fungal Plasma Membrane and Cell Wall Open
The harmful effect of synthetic fungicides on the environment and the development of resistance by fungi raises concerns about their security and future efficacy. In this work, we investigated plant by-products with the antifungal activity…
Propolis Efficacy: The Quest for Eco-Friendly Solvents Open
Propolis, a natural product made by bees with resins and balsams, is known for its complex chemical composition and remarkable bioactivities. In this study, propolis extraction was studied seeking extracts with strong bioactivities using l…
Mixing Propolis from Different Apiaries and Harvesting Years: Towards Propolis Standardization? Open
Global demand for safe, effective and natural products has been increasing in parallel with consumers’ concerns about personal and environmental health. Propolis, a traditional and potentially medicinal product with several health benefits…
Bark Extract of Uncaria tomentosa L. for the Control of Strawberry Phytopathogens Open
Gray mold (Botrytis cinerea Pers.), crown and fruit rot (Phytophthora cactorum (Lebert and Cohn) J.Schröt), and verticillium wilt (Verticillium dahliae Kleb.) are among the main diseases that affect the strawberry crop. In the study presen…
Selective Cytotoxicity of Portuguese Propolis Ethyl Acetate Fraction towards Renal Cancer Cells Open
Renal cell carcinoma is the most lethal cancer of the urological system due to late diagnosis and treatment resistance. Propolis, a beehive product, is a valuable natural source of compounds with bioactivities and may be a beneficial addit…
View article: Distinctive Features of Composts of Different Origin: A Thorough Examination of the Characterization Results
Distinctive Features of Composts of Different Origin: A Thorough Examination of the Characterization Results Open
The potential of composts produced from different origin residues to be used in environmentally friendly agriculture is addressed in this work. Seven composts obtained from different raw materials and composting methodologies are compared …
Propolis antibacterial and antioxidant synergisms with gentamicin and honey Open
Aims Assess the antibacterial and antioxidant effects of ethanol extracts of Portuguese propolis samples when combined with gentamicin, a widely used aminoglycoside antibiotic, or with honey, collected from the same apiary as propolis. Met…
Synthesis, Characterization and Preliminary Antibacterial Evaluation against Staphylococcus aureus of a New 2,4,5-Tri(hetero)arylimidazole Derivative Based on Azaindole Heterocycle Open
Imidazole derivatives are known for their numerous biological applications, such as antibacterial, antifungal, antioxidant, antiviral, antiparasitic and anticancer, among others. Therefore, several imidazole derivatives have been synthesiz…
Synthesis and screening of antibacterial activity of 2,4,5-tri(hetero)arylimidazoles based on thieno[3,2-b]thiophene Open
After the discovery of antibiotics, efforts were made to develop new drugs in order to treat infections caused by a wide range of bacterial strains. With the use of antibiotics for decades, bacteria have adapted, so that resistant strains …
How to engage engineering students to Physics: A case report of an Introductory Physics course taught in the first year of an Engineering programme Open
Lecturers who teach Introductory Physics courses to engineering students face several challenges. Besides the usually high number of students (> 100), there is a preconception in considering the contents of physics courses very complex. Th…
Antifungal Properties of Urtica dioca against Six Phytopathogenic Fungi Open
Several phytopathogenic fungi greatly affect the production of important crops across the globe, as they lead to huge losses. To control diseases caused by fungal phytopathogens, a wide range of synthetic fungicides are applied in the fiel…
Protective Antifungal Activity of Plantago major Extract Against the Phytopathogenic Fungi Phytophthora cinnamomi, Diplodia corticola and Colletotrichum Species Open
Synthetic fungicides for crops protection raise environmental and human concerns due to accumulation in edible vegetables, showing significant toxicity to humans, and in soil, groundwater and rivers, affecting ecological balance. In additi…
A new insight on synergistic effect between propolis and gentamicin Open
Antimicrobial resistance has become an emergent problem with the increase of resistant strains and the lack of new antibiotics, so that new approaches are needed to overcome this problem [1]. Antimicrobial agents of natural sources have be…
Unique secondary metabolites of a <i>Streptomyces</i> strain isolated from extreme salty wetland show antioxidant and antibacterial activities Open
Sabkhat Seijoumi salty wetland represents a potential niche for Streptomyces yielding useful natural products for biotechnological, pharmaceutical and medical applications.
Halophyte plants as a potential tool against toxicity of food contaminants Open
Foods can be contaminated with toxic chemicals such as residues resulting from agricultural activities, components from food packaging or compounds formed during food processing and cooking at high temperatures [1]. The long-term consumpti…