84 documents found, page 1 of 9
Analysis of Plasticizer Contamination Throughout Olive Oil Production
Freitas, Flávia; Brinco, João; Cabrita, Maria João; Gomes da Silva, MarcoThis study monitored the contamination of 32 plasticizers in olive oil throughout the production and storage process. Samples were collected at different stages of production from three olive oil production lines in distinct regions of Portugal and analyzed for 23 phthalates and 9 phthalates substitutes to identify contamination sources. The developed analytical method employed liquid–liquid extraction with hex...
The potential of enzymatic hydrolysis with HS-SPME-GC×GC-ToFMS for the study of...
Fonseca, Daniela; Martins, Nuno; Garcia, Raquel; Cabrita, Maria JoãoThis works focuses on developing an optimized methodology for analyzing free and bound volatile compounds in grapes using enzymatic hydrolysis with AR2000 enzyme and HS-SPME-GC × GC-ToFMS. To achieve this purpose, a previous optimization step of enzymatic hydrolysis was implemented and optimal conditions for enzymatic hydrolysis were established using 50 mg of AR2000 enzyme at 35 ◦C for 24 h, while the best ext...
Olive Growing Systems, Varieties and Olive Oil Production Systems
Garcia, Raquel; Cabrita, Maria João; Dias, António BentoPortuguese olive groves suffered a great setback in the decades of 50s-60s of the 20th century with the rural exodus. Portugal´s entry into the EEC/EU in 1986 created conditions to the reconversion of existing olive groves, enabling the plantation of new orchards with 200-300 trees per ha and the use of varieties from other regions. At the beginning of the 21st century, the construction of Alqueva dam in Alente...
Monitoring mulch-based solutions to reduce runoff and erosion in a variety of l...
Canedo, João; Coelho, Luisa; Basch, Gottlieb; Cabrita, Maria João; Cachapa, Filipa; Caldeira, Filipa; Gonzalez-Pelayo, Óscar; Marques, J. TiagoSoil erosion is a critical socio-environmental problem for rural Mediterranean ecosystems and landscapes. Erosion inflicts multiple, serious damages in agro-ecosystems, including vineyards and olive groves, and also in other semi-natural ecosystems such as the Montado (cattle-sheep pastureland combined with Quercus sp. trees). In particular, erosion reduces the water storage capacity, soil organic matter, nutri...
The potential of enzymatic hydrolysis with HS-SPME-GC×GC-ToFMS for the study of...
Fonseca, Daniela; Martins, Nuno; Garcia, Raquel; Cabrita, Maria JoãoThis works focuses on developing an optimized methodology for analyzing free and bound volatile compounds in grapes using enzymatic hydrolysis with AR2000 enzyme and HS-SPME-GC × GC-ToFMS. To achieve this purpose, a previous optimization step of enzymatic hydrolysis was implemented and optimal conditions for enzymatic hydrolysis were established using 50 mg of AR2000 enzyme at 35 °C for 24 h, while the best ext...
Exploring the Aroma Profile of Traditional Sparkling Wines: A Review on Yeast S...
Pinheiro, Sara Sofia; Campos, Francisco; Cabrita, Maria João; Gomes da Silva, MarcoSparkling wine is a complex alcoholic beverage with high economic value, produced through a secondary fermentation of a still wine, followed by a prolonged aging period that may last from nine months to several years. With the growing global demand for high-quality sparkling wines, understanding the biochemical mechanisms related to aroma development has become increasingly relevant. This review provides a comp...
Agricultural practices as promoters of oleocanthal and oleacein availability in...
Ferro, Miguel D.; Caño-Carrillo, Irene; Gilbert-López, Bienvenida; Fernández-García, Alfonso; Cabrita, Maria João; Herrera, José M; Duarte, FátimaVirgin olive oil (VOO) is one of the greatest differentiating elements within the Mediterranean Diet, mainly due to its health-promoting properties associated with the presence of specific antioxidants—the phenolic compounds (PC). Among all PC in VOO, oleocanthal and oleacein are two of the most important, mainly due to their strong association with health benefits. The presence of these PC in VOO can be induce...
Irrigation Regime Effects on Phenolic Composition of Portuguese Grape Varieties
Fonseca, Daniela; Sánchez-Gómez, Rosário; Salinas, Rosário; Cabrita, Maria João; Martins, Nuno; Garcia, Raquel; Cebrián-Tarancón, CristinaClimate change has led to increased extreme weather events, such as severe droughts and intense rainfall, with regions in Portugal, like Alentejo and Algarve, being particularly affected. Understanding the influence of water availability in the concentration of phenolic compounds in autochthonous varieties could be an important tool to know how these varieties adapt to water scarcity. This work has been carried...
Cadernos de enologia - clarificação e estabilização de vinhos
Cabrita, Maria JoãoInstabilidade e fenómenos coloidais A clarificação de vinhos A instabilidade tartárica em vinhos A instabilidade proteica em vinhos A instabilidade da matéria corante coloidal As precipitações metálicas
Cadernos de Enologia - A FML
Cabrita, Maria JoãoIntrodução As bactéria lácticas O metabolismo das bactérias lácticas O metabolismo dos ácidos orgânicos O metabolismo dos açucares Outras transformações O efeito da FML nas características dos vinhos Os fatores que afetam a FML Inoculação de BL O controlo da FML Outras considerações sobre a FML