o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). APRESENTAÇÃO O e-book Inovação em Ciência e Tecnologia de Alimentos -Vol 1, 2 e 3, traz um olhar integrado da Ciência e Tecnologia de Alimentos. A presente obra é composta por 86 artigos científicos que abordam assuntos de extrema importância relacionados às inovações na área de Ciência e Tecnologia de alimentos. No volume 1 o leitor irá encontrar 28 artigos com assuntos que abordam a inovação no desenvolvimento de novos produtos como sucos, cerveja, pães, nibs, doce de leite, produtos desenvolvidos a partir de resíduos, entre outros. O volume 2 é composto por 34 artigos desenvolvidos a partir de análises físico-químicas, sensoriais, microbiológicas de produtos, os quais tratam de diversos temas importantes para a comunidade científica. Já o volume 3, é composto por 25 artigos científicos que expõem temas como biotecnologia, nutrição e revisões bibliográficas sobre toxinfecções alimentares, probióticos em produtos cárneos, entre outros. Diante da importância em discutir as inovações na Ciência e Tecnologia de Alimentos, os artigos relacionados neste e-book (Vol. 1, 2 e 3) visam disseminar o conhecimento e promover reflexões sobre os temas. Por fim, desejamos a todos uma excelente leitura!
The objective of this research was to compare the physical and chemical characteristics and antioxidant activity of organic and conventional carrot (Daucus carota), green pepper (Capsicum annuum) and lettuce (Lactuca sativa). Five representative samples of conventional vegetables, certified organic and non-certified organic vegetables were gotten from farms and supermarkets in the city of Rio de Janeiro. The result shows that the organic carrot showed higher acidity (0.11 g % citric acid) and total sugar (5.68 g %) than those found in standard samples and certified organic ones (p<0.05). Regarding the density analysis and total soluble solids, there was no statistical difference between carrots, green peppers and lettuce from all types (p>0.05). It was observed that the vitamin C levels in carrot samples levels had no significant difference between the different forms of production (p>0.05). Conventional lettuce and certified organic pepper showed higher vitamin C than the other samples (p<0.05). The antioxidant activity of the samples was analysed by the capacity to reduce the DPPH (1,1diphenyl-2-picryl-hydrazyl) radical, in which carrot and conventional pepper showed lower antioxidant activity (p<0.05) when compared to organic samples. There were no significant differences among the different forms of production in the lettuce samples (p>0.05). Carrot and green pepper, with seal certification or not, showed higher capacity to reduce DPPH than the conventional ones, this suggests that the form of cultivation has a direct relationship with the nutritional values of the vegetables.
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