Caracterização físico-química e nutricional de variedades de tomate (Lycopersicum esculentum, Mill) orgânico / Physicochemical and nutritional characterization of organic tomato varieties (Lycopersicum esculentum, Mill)

provavelmente na Região Andina, parte ocidental da América do Sul. Seus frutos são bagas carnosas, suculentas, variando em aspecto, tamanho e peso, dependendo do cultivar e do manejo adotado. Este projeto procurou estudar a composição físico-química e nutricional de sete variedades de tomate obtidas sob cultivo orgânico de produção. Os resultados apresentaram os seguintes limites: massa variou entre 17 e 143g, o pH de 3,99 a 4,88, sólidos solúveis totais de 3,83 a 4,60 ºBrix, acidez total titulável de 0,28 a 0,36%, relação SST/ATT de 11,2 a 13,9, umidade de 88,8 a 96,2%, cinzas de 0,44 a 0,97%, proteínas de 0,25 a 0,94%, lipídeos de 0,12 a 0,90%, carboidratos de 2,02 a 8,70% e VET de 15,9 a 42,5 kcal. Cada amostra foi analisada em triplicata e apresentou entre baixa a média dispersão, mas com diferenças entre cultivares que podem ser atribuídas à genética e as condições edafoclimáticas. Com os resultados obtidos, concluiu-se que, além de terem sido obtidas sob cultivo orgânico, o que já confere vantagem por não possuírem resíduos químicos, os cultivares apresentaram alta qualidade do ponto de vista físico-químico e nutricional.(AU)

The tomatoes probably have their origin in the Andean Region, western part of South America. Its berries are fleshy, succulent, varying in appearance, size and weight, depending on the cultivar and management adopted. This project sought to study the physical and chemical composition and nutritional seven tomato varieties produced under organic crop production. The results showed the following limits: mass ranged between 17 and 143g, the pH from 3.99 to 4.88, soluble solids from 3.83 to 4.60 ºBrix, titratable acidity from 0.28 to 0.36%, TSS / TTA ratio from 11.2 to 13.9 ºBrix/%, 88.8 to 96.2 moisture%, ash 0.44 to 0.97%, protein 0.25 to 0.94%, lipid 0, 12 to 0.90%, carbohydrates from 2.02 to 8.70% and from 15.9 to 42.5 VET kcal. Each sample was analyzed in triplicate and showed low and medium dispersion, but with differences between cultivars that can be attributed to genetics and the soil and climatic conditions. With these results, it was concluded that in addition to having been obtained under organic cultivation, which already gives advantage by not having chemical residues, the cultivars showed high quality in terms of physical-chemical and nutritional.

Willingness to pay more for value-added pomegranate juice (Punica granatum L.): An open-ended contingent valuation.

This study aimed at estimating the consumer's willingness to pay (WTP) more for value-added pomegranate juice using the contingent valuation method (CVM). The WTP was estimated applying the open-ended elicitation technique with 454 consumers in two supermarkets located in Rio de Janeiro, Brazil. The average consumer's WTP more for pomegranate juice was estimated in R$2.04 (Brazilian currency) and the income elasticity coefficient at the midpoint was 0.19, i.e., a 10% increase in consumer income will increase, on average, 1.9% the WTP of pomegranate juice (ceteris paribus). Therefore, the income elasticity coefficient was considered inelastic, once an increase in income would have low effect on the WTP for these consumers. The results indicated that the consumers were interested in acquiring a non-traditional juice processed using a technology that preserves vitamins and antioxidants, maintains the flavor of "fresh juice" without colorants and preservatives, despite the pomegranate is not part of the Brazilian diet.