44 documents found, page 1 of 5
Rapid screening of fumonisins in maize using near-infrared spectroscopy (NIRS) ...
Sampaio, Pedro; Barros, Sílvia Cruz; Freitas, Andreia; Silva, Ana Sanches; Brites, Carla; Carbas, BrunaFumonisins occurrence in maize represents a significant global challenge, impacting economic stability and food safety. This study evaluates the potential of near-infrared (NIR) spectroscopy combined with chemometric al- gorithms to detect fumonisins in maize. For fumonisin B1 (FB1) and B2 (FB2) levels were developed predictive NIR models using partial least squares (PLS) and artificial neural networks (ANN). P...
Comparative Analysis of Maize Physico-Chemical Parameters and Mycotoxin Levels ...
Carbas, Bruna; Barros, Sílvia; Freitas, Andreia; Silva, Ana Sanches; Brites, Carla; Carbas, BrunaMaize (Zea mays L.) stands as a vital staple food globally, holding significant nutritional and economic value. However, its susceptibility to mycotoxin contamination under stressful environmental conditions poses a considerable concern. This study aimed to assess the quality and pasting characteristics of maize varieties across two distinct regions and examine the occurrence of mycotoxins influenced by climati...
Risk Assessment of Nine Coccidiostats in Commercial and Home-Raised Eggs
Martins, Rui R.; Pereira, André; Silva, Liliana; Esteves, Alexandra; Duarte, Sofia C.; Freitas, Andreia; Pena, AngelinaThe poultry industry, in order to prevent and control coccidiosis caused by Eimeria spp., widely uses coccidiostats as feed additives. The main objective of this study was to evaluate the presence of nine coccidiostats in 62 egg samples by UHPLC-MS/MS. Overall, detection frequency and average concentration were 90.3% (56/62) and 106.3 μg kg-1, respectively. Only diclazuril and nicarbazin were detected. Diclazur...
Mycotoxins in Raw Bovine Milk: UHPLC-QTrap-MS/MS Method as a Biosafety Control ...
Leite, Marta; Freitas, Andreia; Barbosa, Jorge; Ramos, FernandoMycotoxins are compounds produced by several fungi that contaminate agricultural fields and, either directly or by carry-over, final food products. Animal exposure to these compounds through contaminated feed can lead to their excretion into milk, posing threats to public health. Currently, aflatoxin M1 is the sole mycotoxin with a maximum level set in milk by the European Union, as well as the most studied. No...
Assessment of Agricultural Practices for Controlling Fusarium and Mycotoxins Co...
Simões, Daniela; Carbas, Bruna; Soares, Andreia; Freitas, Andreia; Silva, Ana Sanches; Brites, Carla; Andrade, Eugénia deMaize is a significant crop to the global economy and a key component of food and feed, although grains and whole plants can often be contaminated with mycotoxins resulting in a general exposure of the population and animals. To investigate strategies for mycotoxins control at the grain production level, a pilot study and exploratory research were conducted in 2019 and 2020 to compare levels of mycotoxins in gr...
Pharmaceuticals Removal from Wastewater with Microalgae: A Pilot Study
Pereira, André; Morais, Etiele Greque de; Silva, Liliana; Pena, Angelina; Freitas, Andreia; Teixeira, Margarida Ribau; Varela, João; Barreira, LuísaUrban wastewaters contain pharmaceuticals that are not appropriately removed in conventional wastewater treatments, limiting treated water reuse. Microalgae have been shown to remove pharmaceuticals from urban wastewater in laboratory trials, but few studies have been conducted under natural conditions. In this work, pharmaceutical removal was assessed in a pilot-scale microalgal tertiary wastewater treatment i...
Pharmaceuticals in Coastal Waters: An UHPLC-TOF-MS Multi-Residue Approach
Leston, Sara; Freitas, Andreia; Rosa, João; Vila Pouca, Ana Sofia; Barbosa, Jorge; Reis-Santos, Patrick; Fonseca, Vanessa F.; Pardal, MiguelAnthropogenic chemical contamination represents a key stressor of natural environments with pharmaceuticals comprising a particular group of emerging pollutants with the potential to induce biological responses in non-target organisms. Therefore, an analytical method based on ultra-high-performance liquid chromatography coupled to time-of-flight tandem mass spectrometry (UHPLC-TOF-MS) was developed for estuarin...
Analysis of Antibiotics in Bivalves by Ultra-High Performance Liquid Chromatogr...
Pereira, André; Freitas, Andreia; Pena, Angelina; Silva, LilianaThe presence of pharmaceuticals in aquatic ecosystems mostly originates from wastewater treatment plants (WWTPs) and such a situation can be responsible for significant negative impacts on natural ecosystems, such as estuarine and coastal areas. Bioaccumulation of pharmaceuticals, namely antibiotics, in exposed organisms is known to have remarkable effects on different trophic levels of non-target organisms suc...
Regulated and Emerging Mycotoxins in Bulk Raw Milk: What Is the Human Risk?
Leite, Marta; Freitas, Andreia; Barbosa, Jorge; Ramos, FernandoMycotoxins are abiotic hazards whose contamination occurs at the pre- and post-harvest stages of the maize value chain, with animal exposure through contaminated feed leading to their excretion into milk. Currently, only aflatoxin M1 is regulated in milk products. Since feed materials and complete feed present a multi-mycotoxin composition and are the main mycotoxin source into milk, it is important to recogniz...
Comprehensive assessment of different extraction methodologies for optimization...
Leite, Marta; Freitas, Andreia; Barbosa, Jorge; Ramos, FernandoA multi-analyte method for identification and quantification of 23 regulated and emerging mycotoxins was devel- oped in maize samples by ultra high-performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS). Several extraction methodologies were evaluated, including solid-liquid extraction (SLE), solid- phase extraction (SPE), and modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged...