Influence of etylen on the chemical characteristics of mango fruits var. Keitt, harvested in the pre-climateric stage

Frutos de manga (Mangifera indica L.) variedade Keitt, colhidos em estádio pré-climatérico, receberam tratamento com 500 e 1.000 ppm de Ethrel (com exceção da testemunha), sendo submetidos a determinações de carboidratos solúveis, vitamina C, proteínas e umidade, de acordo com amostragens realizadas 3, 6, 9 e 16 dias pós-colheita. Os resultados obtidos, revelaram que o Ethrel não excerceu nenhuma influência nas características químicas dos frutos e que, somente em termos de carboidratos solúveis e vitamina C, os frutos mostraram alterações durante a maturação.Mango fruits (Mangtfera indica L.) Keitt variety, harvested in the pre-climateric stage were treated with 500 and 1,000 ppm of Ethrel (except the control). Soluble carbohydrates, vitamin C, proteins and humidity were evaluated on the samples at 3, 6, 9 and 16 days post-harvest. The results obtained, showed that Ethrel did not have influence on the chemical characteristics of the fruits. Fruits showed modificátions during the maturation only for the parameters of soluble carbohydrate and vitamin C

Influence Of Maturity Stage On Fruit Longevity Of Cherry Tomatoes Stored At Ambient And Controlled Temperature

Fruit maturity stage has direct influence on the post-harvest life and consumer quality. Therefore, the understanding of the maturation process and its quality characteristics for storage are key factors for commercialization. In face of the foregoing, this study aimed to determine shelf life and changes in physical and chemical indexes of cherry tomatoes (Perinha Água Branca (PAB) and Mascot), assessing fruit harvested at four maturity stages and stored at ambient and controlled temperatures. For this, it was used fruit at turning, pink, red and ripe maturity stages, submitted to ambient (25 ± 2 °C) and controlled (12 °C and 90% RH) temperature, and assessed over time the indexes of fresh mass loss, titratable acidity, pH, soluble solids and ascorbic acid. The experimental design was completely randomized design in a factorial scheme of 2×4×7 for ambient temperature and 2×4×8 for controlled temperature. At ambient temperature, a longevity of up to 20 days was observed for PAB and Mascot fruit harvested at turning and pink maturity stages. When harvested at red and ripe stages, the longevity was of 15 days for PAB fruit and of 15 and 11 days, respectively, for Mascot fruit. At controlled temperature, PAB fruit showed longevity of 24 days when harvested at turning and pink stages and of 20 and 7 days, respectively, when harvested at red and ripe stages. A longevity of up to 27 days was observed for Mascot fruit harvested at turning stage and of 24 days for the other stages. The fruit harvested at turning and pink maturity stages, associated with storage under controlled conditions, presented higher longevity and maintenance of physical and chemical indexes of quality.3764027403

Influência do etileno sobre características químicas de frutos de manga var. Keitt, colhidos em estádio pré-climatérico

Frutos de manga (Mangifera indica L.) variedade Keitt, colhidos em estádio pré-climatérico, receberam tratamento com 500 e 1.000 ppm de Ethrel (com exceção da testemunha), sendo submetidos a determinações de carboidratos solúveis, vitamina C, proteínas e umidade, de acordo com amostragens realizadas 3, 6, 9 e 16 dias pós-colheita. Os resultados obtidos, revelaram que o Ethrel não excerceu nenhuma influência nas características químicas dos frutos e que, somente em termos de carboidratos solúveis e vitamina C, os frutos mostraram alterações durante a maturação.Mango fruits (Mangtfera indica L.) Keitt variety, harvested in the pre-climateric stage were treated with 500 and 1,000 ppm of Ethrel (except the control). Soluble carbohydrates, vitamin C, proteins and humidity were evaluated on the samples at 3, 6, 9 and 16 days post-harvest. The results obtained, showed that Ethrel did not have influence on the chemical characteristics of the fruits. Fruits showed modificátions during the maturation only for the parameters of soluble carbohydrate and vitamin C

Descriptions of two extinct mammals of the order Xenarthra from the Pleistocene of Texas

Volume: 51Start Page: 107End Page: 12

Avaliação físico-química de frutos de bananeiras Physiochemical evaluation of resistant banana fruits

A produção nacional de banana está comprometida pela atuação da sigatoka-negra (Mycosphaerella fijiensis Morelet) por todo o país, e particularmente no Amapá. Os cultivares Caipira, Thap Maeo, PV03-44, FHIA-01 e FHIA-18, altamente resistentes à doença, e o cultivar suscetível FHIA-21 foram avaliados quanto às características físico-químicas dos frutos, no período de 2003-2004, nas condições edafoclimáticas do Estado do Amapá. O teor médio de umidade dos frutos de banana foi de 74,61% onde FHIA-18 (75,91%) diferiu estatisticamente de Thap Maeo (74,01%), FHIA-21 (73,96%) e de PV03-44 (73,68%). Em relação à matéria seca dos frutos (média de 25,39%), FHIA-18 (24,09%) apresentou valores significativamente menores que PV03-44 (26,32%), FHIA-21 (26,04%) e Thap Maeo (25,99%). Foi observado que as polpas dos cultivares apresentaram natureza ácida (pH 4,8), sendo que PV03-44 (5,1) diferiu estatisticamente de FHIA-18 (4,6). No teor de sólidos solúveis (média de 21,51ºBrix), o cultivar FHIA 21 (24,82ºBrix) diferiu significativamente dos demais. A relação SS/AT (média de 82,90) do cultivar FHIA-21 (99,23) diferiu estatisticamente de Thap Maeo (78,95), FHIA-18 e PV03-44 (77,48). Em relação à acidez titulável (0,27% ácido málico) e ao teor de lipídeos (0,17%), não houve diferenciação entre os cultivares. Quanto ao teor protéico dos materiais resistentes à sigatoka-negra, a média do ensaio foi de 4,59%, tendo o genótipo PV03-44 (4,08%) diferido estatisticamente dos demais. Os cultivares resistentes estudados apresentaram aspectos positivos de qualidade, principalmente na relação SS/AT, um dos principais parâmetros de atributo qualitativo de sabor da fruta.<br>Banana's national production is committed by the performance of the black sigatoka (Mycosphaerella fijiensis Morelet) for the whole country, and particularly in Amapá, Brazil. This work aimed at evaluating cultivars highly resistant to the disease, Caipira, Thap Maeo, PV03-44, FHIA-01, FHIA-18, and to susceptible cultivar FHIA-21, with relationship to the physical and chemical characteristics of the fruits, in the period of 2003-2004, under the edafoclimatic conditions of the state of Amapá. The medium moisture content of banana fruits was 74,61%, and FHIA-18 (75,91%) differed statistically of Thap Maeo (74,01%), FHIA-21 (73,96%) and PV03-44 (73,68%). In relation to the dry matter of fruits (25,39%), FHIA-18 (24,09%) presented values significantly smaller than PV03-44 (26,32%), FHIA-21 (26,04%) and Thap Maeo (25,99%). It was observed that the pulps of the cultivars presented acid nature (pH 4,8), and PV03-44 (5,1) differed statistically of FHIA-18 (4,6). In the soluble solids content (average of 21,51ºBrix), the cultivar FHIA-21 (24,82ºBrix) differed significantly of the others. The ratio SS/TA (average of 82,90) of the cultivar FHIA-21 (99,23) differed statistically of Thap Maeo (78,95), FHIA-18 and PV03-44 (77,48). In relation to the titratable acidity (0,27% malic acid) and to lipids content (0,17%), there was not difference among the cultivars. Regarding to the protein content of the resistant materials to the black sigatoka, the average of the experiment was of 4,59%, and the genotype PV03-44 (4,08%) differed statistically of the others. The resistant cultivars presented positive aspects of quality, mainly in the ratio TSS/TTA, one of the main parameters of qualitative attribute of fruit flavor