149 documents found, page 1 of 15
Optimization of heat and ultrasound-assisted extraction of Eucalyptus globulus ...
Lima, Laíres; Pereira, Ana I.; Vaz, Clara B.; Ferreira, Olga; Dias, Maria Inês; Heleno, Sandrina A.; Calhelha, Ricardo C.; Barros, LillianThe extraction of phenolic compounds from eucalyptus leaves was optimized using heat and ultrasound-assisted techniques, and the bioactive potential of the resulting extract was assessed. The independent variables, including time (t), solvent concentration (S), and temperature (T) or power (P), were incorporated into a fivelevel central composite design combined with Response Surface Methodology. Phenolic conte...
Organização da Informação no Arquivo de Infraestruturas no Politécnico do Porto
Ferreira, Olga; Aboim, Lara; Carvalho, Milena; Martins, SusanaEste artigo pretende destacar a relevância do profissional de informação num arquivo, enfatizando a importância do seu trabalho. O profissional de informação desempenha um papel crucial na organização e na gestão eficiente de documentos, facilitando o acesso rápido e preciso à informação essencial para qualquer organização. A gestão arquivística é um pilar essencial para a preservação da memória organizacional ...
Avaliação da Aplicação da Portaria 12/2008 no P.PORTO
Carvalho, Milena; Martins, Susana; Ferreira, Olga; Rocha, CarlaUm regulamento de conservação arquivística é um conjunto de normas reguladoras da gestão documental de um organismo ou serviço, determinando, mediante avaliação, as fases do ciclo de vida dos documentos. A importância da sua aplicação é inestimável dado que é o regulamento que estabelece diretrizes e procedimentos para a avaliação, seleção, transferência, incorporação em arquivo definitivo, substituição de supo...
Extraction of phenolic compounds from Juglans regia L. leaves using aqueous sol...
Cordova, Isabella Weber; Oludemi, Taofiq; Vieira, Vanessa; Pires, Tânia C.S.P.; Pinho, Simão; Barros, Lillian; Ferreira, OlgaThe leaves of Juglans regia L. (walnut tree) are a rich source of bioactive phenolic compounds, particularly flavonoids and phenolic acids, which can be used in cosmetic applications due to their antioxidant properties. Conventionally, these compounds are extracted using volatile organic solvents. This study focuses on a more sustainable approach by designing a heat-assisted extraction process using aqueous sol...
Antipneumococcal Vaccination in Diabetic Patients at a Family Health Unit: Cont...
Marques, João Mário; Pereira Pinto, Gisela; Cruz Pinto, Daniela; Ferreira, Olga; Portela Cardoso, VítorIntroduction: Streptococcus pneumoniae is an important cause of infection in humans, causing invasive pneumococcal disease (IPD). Patients with diabetes are more susceptible and vulnerable to infection and serious illness, and antipneumococcal vaccination (VApn) is recommended to prevent IPD. The estimated prevalence of diabetes in Portugal is 13.6% and, despite the benefits of VApn, only 5% of them are immuniz...
Solubility of olive oil phenolic compounds in green solvents
Vale, Mariana Ribeiro de Paula; Zambom, Aline; Krüger, Felipe; Martins, Mónia A. R.; Coutinho, João A.P.; Pinho, Simão; Peres, António M.Olive oil production yields by-products rich in bioactive phenolics with potential uses in several types of industries
Solubility of olive oil phenolic compounds in green solvents
Vale, Mariana Ribeiro de Paula; Zambom, Aline; Krüger, Felipe; Martins, Mónia A. R.; Coutinho, João A.P.; Pinho, Simão; Peres, António M.The production of olive oil generates various by-products that are rich in phenyl alcohols, secoiridoids, phenolic acids and aldehydes, flavonoids, and other bioactive compounds. Due to their diverse biological activities, these compounds have promising potential as functional additives in the food, pharmaceutical, and cosmetics industries.1 However, data on their solubility in water and common volatile organic...
Special Issue on 20th Edition of the International Symposium on Solubility Phen...
Ferreira, Olga; Pinho, SimãoThis special issue comprises selected works presented at the 20th edition of the International Symposium on Solubility Phenomena and Related Equilibrium Processes, held online from 4 to 9 September 2022 at the Polytechnic Institute of Bragança, Portugal. This biennial IUPAC symposium gathered 110 delegates from 25 countries to discuss solubility studies and associated physical properties in various thematic ses...
IN PRESS - Solvent screening for the purification of monoterpenoids by counterc...
Vilas‐Boas, Sérgio M.; Coutinho, João A.P.; Pinho, Simão; Ferreira, OlgaCountercurrent chromatography (CCC) and centrifugal partition chromatography (CPC) are efficient techniques to purify terpenoids from essential oils. These methods require suitable solvent systems for the partition between the two immiscible liquid phases. In this study, using the analytical shake-flask method, we measured the partition coefficients of three model monoterpenoids, namely carvone, eucalyptol and ...
Using Molecular Conformers in COSMO-RS to Predict Drug Solubility in Mixed Solv...
Cordova, Isabella Weber; Teixeira, Gabriel; Ribeiro-Claro, Paulo J.A.; Abranches, Dinis O.; Pinho, Simão; Ferreira, Olga; Coutinho, João A.P.This work explores the impact of solute conformers on the conductor-like screening model for real solvents (COSMO-RS) solubility predictions of vanillin and ethyl vanillin in water, short alcohols, and their mixed solvents. Two major conformers of these solutes and changes with solvent polarity were experimentally established by Raman spectroscopy and further confirmed by density functional theory calculations....