Desenvolvimento de néctares mistos de frutas tropicais adicionados de Ginkgo biloba e Panax ginseng

• Ano de defesa: 2006
• Autor(a) principal: Sousa, Paulo Henrique Machado de
• Orientador(a): Ramos, Afonso Mota
• Banca de defesa: Minim, Valéria Paula Rodrigues , Oliveira, Tânia Toledo de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Ciência e Tecnologia de Alimentos
• Departamento: Ciência de Alimentos; Tecnologia de Alimentos; Engenharia de Alimentos
• País: BR
• Palavras-chave em Português: Frutas tropicais; Componenetes funcionais; Suco de fruta
• Palavras-chave em Inglês: Tropical fruits; Functional components; Fruit juice
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS::TECNOLOGIA DE ALIMENTOS
• Link de acesso: http://locus.ufv.br/handle/123456789/409

With the appealing of changes to healthy habits, it is observed that the consumption of fresh fruit has increased all over the world, and processed juices are an extension of that. Beverages presenting new flavors and aromas are being elaborated; being the mixed fruit drinks one more option to consumers and a trend to international market. The addition of functional components can also be noticed, and extracts of Ginkgo biloba e Panax ginseng are new options, once they present large benefits to human s health and aggregate value to fruit products. According to what was quoted, the actual work had as objective to develop mixed nectars based on cashew apple, mango and acerola, added to extracts of Ginkgo biloba e Panax ginseng and the mix of both extracts, as well as to study the stability of the developed products for six months. They were developed mixed nectars of tropical fruit formulated with at least 35% of pulp and total soluble solids, with 11°Brix. The values of pulp varied according to design of the mixtures: cashew apple (12.25%-21.00%); acerola (1.75%-10.50%); and mango (12.25%-21.00%). The formulation containing 12.25% of cashew apple, 21.00% of mango and 1.75% of acerola was best accepted among the panelists, and it showed 49.9mg of vitamin C/100mL of nectar. The sensorial responses were also evaluated trough cluster analyses and the obtained groups were submitted to main components analyses, showing the existence of three distinct groups among the panelists, indicating clearly consumer s segmentation that preferred different formulations. The addition of Ginkgo biloba and Panax ginseng extracts and the mixture of both in concentrations of 15, 20, 25 and 30mg/100ml nectar were tested at nectars; it was observed that values decreased as the concentration of the extract was being enhanced. They was selected the nectars with addition of 15mg of Ginkgo biloba extract/100 mL, 20 mg of Panax ginseng extract/100 mL and the mixture containing 10 mg of de Ginkgo biloba extract and 10 mg of Panax ginseng extract/100 mL for stability evaluation for the period of 180 days of storage in similar conditions of commercialization. The thermal treatment of 90 oC / 60s, combined to the addition of sodium benzoate and sodium metabisulfite were sufficient to guarantee microbiological stability of the formulated nectars at room temperature. The values of pH, soluble solids, acidity and reducing sugar showed little variation during 180 days of storage at room temperature. The contents of vitamin C were the ones that presented the highest variations in all mixed fruit nectars during the storage. The storage period did not affect the sensorial quality of the products, besides that, the addition of Ginkgo biloba extract to the mixed fruit nectar altered the consumers acceptance, being these products acceptance the lowest ones. The sensorial results were evaluated trough internal preference mapping methodology, which allowed an identification of the consumers segmentation of aroma, flavor and global impression, being possible an identification of characterization of preferences and consumers groups. The nectars without the addition of extract (control) and addition of Panax ginseng were preferred by consumers in all tested attributes.