3121255 documents found, page 311905 of 312126
Rigid composite materials from olive brush seed and unsaturated polyester resin
Jiménez, L.; Sibaja, María; Alvarado, P.; Jimenez, G.; Barreiro, M.F.; Cateto, Carolina; Lopretti, MaryA composite material using unsaturated commercial polyester resin (UPE) and olive brush seed (OBS) was prepared. OBS was treated with sodium hydroxide and maleic anhydride (MAN) and subsequently utilized in a proportion of 35 wt.% to prepare a composite material. These materials were evaluated in terms of moisture absorption, surface density, and mechanical properties such as flexure and tensile tests.
Maternal structure of Iberian honey bees inferred from whole mitochondrial genomes
Henriques, Dora; Chávez-Galarza, Julio; Patton, John C.; Rufino, José; Pinto, M. AliceThe maternally inherited mitochondrial DNA has been the marker of choice for assessing Iberian honeybee variation, particularly the intergenic tRNA^leu-cox2 region. The data generated by massive sampling of this region confirmed early findings of coexistence of African (A) and western European (M) lineages, forming a south-north cline, and revealed unparalleled levels of haplotype diversity and complexity. Accord...
Visualization of the cell-free layer (CFL) in a PDMS microchannel with a micro-...
Pinho, Diana; Yaginuma, Tomoko; Faustino, Vera; Pinto, Elmano; Rodrigues, Raquel Oliveira; Cidre, Diana; Pereira, Ana I.; Lima, Rui A.Red blood cells (RBCs) have a tendency to undergo axial migration due to the parabolic velocity profile which results in a high shear stress around wall that forces the RBC to move towards the center induced by the tank treading motion of the RBC membrane. As a result there is a formation of cell-free layer (CFL) with extremely low concentration of cells. Based on this phenomenon several works have proposed mic...
Experimental study of temperatures during drilling of ex-vivo bovine bones
Fernandes, M.G.A.; Fonseca, E.M.M.; Natal, Renato; Dias, Maria Isabel Ribeiro; Lopes, Ana Catarina Oliveira; Ribeiro, J.E.he thermal bone necrosis induced during a drilling process is a frequent and potential phenomenon, which contributes to post-operative problems. The frictional heat generated from the contact between the drill bit and the hole wall is unavoidable. However, understanding advanced techniques for acquiring reliable thermal data on bone drilling is important to ensure the quality of the drilled hole.
Geographical origin and drying methodology may affect the essential oil of Lipp...
Teles, Simone; Pereira, J.A.; Santos, Carlos H.B.; Menezes, Renata V.; Malheiro, Ricardo; Lucchese, Angélica M.; Silva, FranceliLippia alba (Mill.) N.E. Brown, the ginger grass, is a medicinal and aromatic plant widely used in Latin America. In this work the effect of the geographical origin and different drying methodologies on L. alba leaves production, essential oil content and composition were evaluated. Field experiments were conducted in three different municipalities (Amargosa, Cruz das Almas and Santo Antônio de Jesus) from Bahi...
Habitat complexity versus habitat heterogeneity: invertebrates prefer macrophyt...
Aleixo, Matheus Henrique Ferreira; Possamai, Luana Caroliny; Castro, Karis Soares Pereira de; Yofukuji, Katia; Cardozo, Ana Lúcia Paz; Fugi, RosemaraAquatic macrophytes serve as shelter and a direct source of food for invertebrates, in addition to indirectly providing items such as algae, detritus, and microorganisms. Thus, aquatic macrophytes act as habitat structuring elements, requiring a distinction between habitat complexity (physical formations such as fractal dimensions, density and biomass) and habitat heterogeneity (diversity of these structures). ...
Evaluation of the antioxidant and antibacterial activity of spearmint (Mentha s...
Moreira, Cláudia; Artilheiro, Ana Sofia; Afonso, Maria João A.P.S.; Amaral, Joana S.Aromatic herbs and spices have been used for centuries in gastronomy for seasoning and flavouring purposes. Additionally, several of these herbs are also used in traditional medicine due to their composition in bioactive compounds. In order to control the microbial growth in foods, the food industry often resorts to the use of additives, namely of authorised preservatives. However, recently there has been a gro...
Oferta e Procura do Sector Turístico no Distrito de Bragança
Esteves, Elsa TavaresEste trabalho pretende analisar e caracterizar a oferta e a procura turísti-ca no distrito de Bragança. A oferta é analisada segundo uma recolha de dados bibliográficos e junto das entidades e organismos turísticos da região. A procura, para além de dados recolhidos junto dessas mesmas entidades é também caracterizada pela inquisição de turistas nacionais e estrangeiros no período de época alta (Agost./ Set. 20...
O trabalho investigativo nas aprendizagens iniciais da matemática
Martins, Cristina; Maia, Ema; Menino, Hugo; Rocha, Isabel; Pires, Manuel VaraEste texto, que constituiu uma base de discussão no grupo de trabalho Investigações matemáticas na aprendizagem na educação pré-escolar e no 1.º ciclo do ensino básico, integrado no XI Encontro de Investigação em Educação Matemática, pretende fazer uma síntese e problematizar o estudo do trabalho de natureza não rotineira, em particular de natureza investigativa, nas aprendizagens iniciais da matemática desenvo...
Nutritional and health claims compliance of olive oils produced from centenaria...
Bortoluzzi, Leticia; Casal, Susana; Cruz, Rebeca; Peres, António M.; Baptista, Paula; Rodrigues, NunoThis work examined whether centenarian trees could be a source of virgin olive oil (VOO) that accomplishes nutritional and health claims regarding unsaturated fatty acids (UFA), tocopherols and phenolic compounds (tyrosol and hydroxytyrosol derivatives). A total of 159 VOOs from centenarian trees of Côa Valley-Portugal were analysed to assess their compliance with those claims. All VOOs met the criteria for ‘hi...