27 documents found, page 1 of 3
Production of nondairy fermented products with chestnut puree as substrate and ...
Afonso, Maria João A.P.S.; Ramalhosa, Elsa; Del Río, Pablo G.; Martins, Fátima; Baptista, Paula; Pereira, Ermelinda; Guerra, Nelson P.This work aimed to study the production, for the first time, of three fermented products of chestnut puree (CP) withmilk kefir grains, a higher nisin-producing (Lactococcus (L.) lactis CECT 539) and a higher lactic acid-producing (Lactobacillus (Lb.) casei CECT 4043) lactic acid bacteria (LAB). After studying the CP rheology, the ability of the two LAB to assimilate the carbon sources (starch, sucrose, glucose,...
Physicochemical Characterisation of Olive Mill Wastewaters Based on Extraction ...
Afonso, Inês Santos; Duarte, Cristina; Afonso, Maria João A.P.S.; Ribeiro, António E.; Amaral, Joana S.; Sousa, Patrícia C.; Lima, Rui A.Olive mill wastewaters (OMWW) generated during olive oil extraction represent a significant environmental challenge due to their high organic matter content, acidic pH, phenolic content, and toxicity. Their composition varies widely depending on the extraction method and remains difficult to treat, particularly for small-scale producers lacking access to complex infrastructure. This study evaluates the combined...
Promoting water efficiency in a student residence as a contribution to sustaina...
Silva, Flora; Barros, João; Afonso, Maria João A.P.S.; Oliveira, Gustavo Gabriel Lima de; Fachada, Ivone; Geraldes, Ana MariaIn addition to the constraints on water availability caused by climatic factors, many urban areas face demographic and pollution phenomena that can affect the efficient supply of water to the population. Therefore, it is increasingly important to implement water efficiency measures, such as reducing consumption by installing water-efficient devices (e.g., taps, showers, and flushing cisterns), without neglectin...
Towards Sustainable Water Use in Two University Student Residences: A Case Study
Geraldes, Ana Maria; Ohara, Gabriel; Afonso, Maria João A.P.S.; Albuquerque, António; Silva, FloraThis research is focused on the water usage patterns in two student residences—one for male students (Residence I) and the other for female students (Residence II). Surveys and measurements of flushing cisterns, taps, and shower flows were conducted to understand water use behaviors. Scenario 1 proposed replacing washbasin and kitchen taps and installing flow reducers in showers, while Scenario 2 combined Scena...
Promoting water efficiency in a student residence as a contribution to sustaina...
Silva, Flora; Barros, João; Afonso, Maria João A.P.S.; Oliveira, Gustavo Gabriel Lima de; Fachada, Ivone; Geraldes, Ana MariaThis study presents the preliminary results of the “HydroSAAP” innovation project, promoted by a Higher Education Institution in the northeast of Portugal, and ongoing since May 2023. It aims to improve the management of water consumption in a student residence, while promoting technical and scientific knowledge about rainwater harvesting systems, still little explored in Portugal. The project phases are: (1) i...
Promoting water efficiency in a municipal market building: a case study
Geraldes, Ana Maria; Pinto, Matheus Fagundes Garcia Duarte Alves; Afonso, Maria João A.P.S.; Albuquerque, António; Calheiros, Cristina; Silva, FloraThis study aimed to determine the water demand of a Municipal Market building to propose water use efficiency measures. The flushing cisterns have the highest water consumption (63.15%), followed by washbasins, restaurant and coffee shop taps, and hairdresser's showerhead (31.64%). Therefore, the implementation of two main categories of solutions: reducing water consumption through the adoption of efficient dev...
A data logger for educational purposes of a laboratory chemical reactor: an IoT...
Lima, José; Brito, Thadeu; Ferreira, Olga; Afonso, Maria João A.P.S.; Pinto, Vítor H.; Carvalho, José Augusto; Costa, Paulo Gomes daThis paper presents the development of an acquisition system and data logger from an existing set of three continuous stirred-tank reactors in series. The reactors are currently used in chemical engineering educational laboratories to perform kinetic and tracer experiments. In this sense, to accomplish the store data process, the volumetric flow rate and the concentration of tracer, reactants and/or products of...
Effect of extraction conditions on flavonoids, tannins, antioxidant and antimic...
Afonso, Maria João A.P.S.; Dias, Rolando; Gomes, Catarina; Pereira, Ermelinda; Pérez Guerra, Nelson; Ramalhosa, ElsaDuring the chestnut processing, are generated high amounts of by-products such as chestnut outer shells. They are a promising source of bioactive compounds. This study aimed to evaluate the presence of bioactive compounds in chestnut outer shells (Castanea sativa Mill.), to valorize this by-product. Material and methods. Several extraction procedures were used, specifically different solvents (water, ethanol:wa...
Evaluation of the kefir potential to produce a fermented product from chestnut ...
Afonso, Maria João A.P.S.; Guerra, Nelson P.; Río, Pablo G.; Martins, Fátima; Baptista, Paula; Pereira, Ermelinda; Ramalhosa, ElsaThe concept of functional food as a source of energy and nutrients, promoting healthy benefit and reducing the disease risk
Effect of stirring and ultrasound-assisted extraction conditions in flavonoids,...
Afonso, Maria João A.P.S.; Dias, Rolando; Gomes, Catarina; Pereira, Ermelinda; Guerra, Nelson P.; Ramalhosa, ElsaThis study aimed to evaluate the presence of bioactive antioxidant molecules in chestnut outer shells. For this proposal, several extraction procedures were used, specifically different solvents (water, ethanol:water (80:20) and acetone:water (80:20)) combined with two extraction methods (stirring and ultrasounds (US)) and times of extraction. Several chemical assays were applied to evaluate the flavonoids, hyd...