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This study conducted in Sergipe State, Brazil, aimed to investigate the presence of polycyclic aromatic hydrocarbons (PAHs) in the surface water of five rivers, determining their sources, spatial and temporal variations, and ecotoxicological risks. Correlation and principal component analyses were utilized to identify the relationship between PAH concentrations and water sample properties. Results indicated higher PAH concentrations during the rainy season, attributed to increased run-off and sediment resuspension. The composition of PAHs suggested a main petroleum source with organic material combustion in minor scale. Ecological risk assessment revealed potential risks to the ecosystem, emphasizing the need for continuous monitoring of PAHs pollution. This study highlights the importance of understanding and mitigating PAHs contamination in rivers to protect aquatic ecosystems.

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Buriti oil is rich in monounsaturated fatty acids, carotenoids and tocopherols and it is used for the treatment of various diseases. One strategy to restructure the triglycerides is enzymatic interesterification and nanocarriers have been employed to improve the solubility, bioavailability and stability of active compounds. This work aims to investigate the in vitro cytotoxicity of this structured oil in nanoemulsions and nanostructured lipid carriers to expand the applicability of the crude oil. None of the samples had a cytotoxic effect on Caco-2 and HepG2 cell lines at the concentrations tested. Structured lipids acted protecting against oxidative stress and lipid peroxidation. Additionally, no consumption of glutathione has been observed in both cells, and the compounds present in buriti oil are possibly acting as antioxidants. Thus, nanoparticles prepared with interesterified buriti oil had low cytotoxicity and high oxidative stability, with great potential for future applications.

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A farinha obtida dos resíduos de processamento da polpa de acerola foi utilizada para preparar biscoitos tipo cookies. O efeito da mistura dessa farinha foi avaliado na composição e aceitabilidade dos cookies. Foram elaboradas formulações com 0% (padrão), 10% (Tipo I) e 20% (Tipo II) de farinha de resíduos de acerola em substituição parcial da farinha de trigo. A farinha de resíduos, constituída de cascas e sementes, apresentou 8,60% de umidade, 8,88% de proteína, 0,52% de lipídios, 3,03% de cinzas, 24,33% de açúcares redutores em glicose, 8,09 μg.g-1 de carotenoides totais, 47,5ºBrix e 9549,61 mg de ácido ascórbico.100g-1. Os cookies preparados com farinha de resíduos obtiveram menores notas na impressão global (5,34-Tipo I e 4,14-Tipo II) em comparação à formulação padrão (6,62). Há necessidade de se efetuar melhorias, como ajuste no teorde umidade nas formulações, para maior aceitação do produto. No biscoito padrão não houve detecção de carotenoides totais e ácido ascórbico, mas estes estiveram presentes no Tipo I, respectivamente, nos valores de1,51 μg.g-1 e 2172,60 mg.100g-1. A farinha de resíduos de acerola, pelo elevado teor de ácido ascórbico, torna se boa alternativa para substituição parcial da farinha de trigo em cookies para melhorar seu valor nutritivo.

Acerola pulp processed residues flour was used as a mixture material for cookies. The effect of the addition ofthis flour was evaluated in the cookies composition and acceptability. Formulations containing 0% (standard),10% (Type I) and 20% (Type II) of acerola residues flour were prepared partially replacing the wheat flour.The residue flour, consisting of peels and seeds, showed 8.60% humidity, 8.88% protein, 0.52% lipids, 3.03%ash, 24.33% of reducing sugars into glucose, 8.09 μg.g-1 of total carotenoids, 47.5°Brix, and 9549.61 mg of ascorbic acid.100g-1. The cookies prepared with acerola residue flour formulations were not well scored onthe global impression of them, being 5.34 (Type I) and 4.14 (Type II) when compared with the standard one (6.62). Improvements as adjusting the moisture contents have to be carried out for increasing cookies acceptance. Neither total carotenoids nor ascorbic acid were detected in the standard cookies, however in Type I cookies these substances rates were of 1.51 μg.g-1 and 2172.60 mg.100g-1, respectively. Acerola residue flour showed a distinct advantage owing to its high ascorbic acid contents, being an useful alternative for partially replacing the wheat flour to improve the nutritional value of prepared cookies.

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