Características pós-colheita em frutos de pitaya orgânica submetida a diferentes doses de irradiação

The objective was to evaluate the influence of different irradiation doses in post-harvest characteristics of pitaya organic species Hylocereus undatus grown in the municipality of Itajobi - SP. The experiment was conducted at the Fruit and Vegetable Department of Agribusiness Management and Technology - FCA / UNESP - Botucatu - SP from December 2008 to January 2009. The radiation process was conducted at the Institute for Energy and Nuclear Research (IPEN) located in Sao Paulo. The design was randomized blocks with six treatments and three replications. The fruits were harvested on the third day after onset of color, selected, cleaned, packed in polystyrene trays covered with PVC film, pre - cooled (8 ° C for 24 hours) and subjected to different doses of gamma irradiation (0.0; 0.2, 0.4, 0.6, 0.8 and 1.0 kGy of cobalt-60) and subsequently stored in cold temperature of 8 degrees C, with relative humidity of about 85 ± 5%. The fruits were evaluated at twenty days after irradiation for pH, soluble solids (SS), Titratable Acidity (TA), ratio (SS / TA) and percentage loss of mass (weight). Data were subjected to analysis of variance and means compared by Tukey test at 5% probability. There were no statistically significant differences (p <0.05) for pH (4.82), soluble solids (11.33) Titratable acidity (0.12) and ratio (79.42) compared to non-irradiated fruit. Regarding the percentage of loss of mass (weight), the highest among the patients treated irradiated with 0.8 kGy (12.12%), whereas for treatment at a dose of 0.0 kGy (irradiated) showed a lower loss weight (11.59%), a result that differs significantly (P <0.05) from the remaining doses of irradiation. The loss of mass (weight) of fruit irradiated with other doses was not statistically significant (P> 0.05).

Efeito da modificação atmosférica em goiabas var. Paluma na redução de danos mecânicos em pós-colheita

In the postharvest management, the fruits can be exposed to injuries that depreciated the quality and the shelf life. Thus, it was evaluated the modified atmosphere effects on guavas var. Paluma subjected to different mechanical damages. Once harvested, the fruits were selected, sanitized and submitted to the treatments T1 (control) - without injuries or packaging in bags of low density polyethylene (LDPE); T2 - without injuries + LDPE bags; T3 - damage by fall of 1 m + LDPE bags; T4 - damage by compression of 9 N + LDPE bags; T5 - damage by fall of 1 m + damage by compression of 9 N + LDPE bags and T6 - damage by fall of 1 m + damage by compression of 9 N without LDPE bags. The treatments were kept in cold storage at 10 ± 1 o C and 94 ± 2% de R.H. The analysis of CO2/ethylene production, enzymatic activity, total and soluble pectins, pulp firmness, titratable acidity (TA), soluble solids (SS), reducing sugars and ascorbic acid were performed every 10 days of refrigeration, and an additional day outside cold storage (22 ± 1o C and 75 ± 3% R.H.) for 30 days. Guavas packed in LDPE bags, not subject to mechanical damage, presented the best quality standards. The fruits suffered only one kind of damage, when packaged, presented satisfactory pattern compared to the fruits without package and not exposed to any mechanical damages. Applying the two kinds of damages, the LDPE packaging was not adequate to decrease the metabolic rate of these fruits, making them unfit for marketing.

Conservação de goiabas ‘Pedro Sato’ minimamente processadas e irradiadas

The aim of this study was to evaluate the effect of gamma irradiation associated with modified atmosphere in cold storage of guava ‘Pedro Sato’ minimally processed, checking their physical-chemical characteristics. Were used guavas from the region of Vista Alegre do Alto/São Paulo/Brazil. After harvest, fruits were immediately transported to the Fruit and Vegetables Laboratory from the Agroindustrial Management and Technology Department, Agronomic Sciences College - UNESP - Botucatu / SP, where they were kept at 10 ° C and 90-95% RH in cold storage, for 12 days. In the laboratory, fruits were selected by size and lack of defects in order to standardize the lot and then were cut into slices 0.5 cm thick. We used the completely randomized design, with factorial design 5 x 5, with three replications. The first factor consisted of the following effects: control 1 (without package or irradiation), control 2 (polystyrene package/PS + package low density polyethylene/LDPE and without irradiation), treatment 1 (PS + LDPE and 0.2 kGy ), treatment 2 (PS + LDPE and 0.6 kGy) and treatment 3 (PS + LDPE and 1.0 kGy). The second factor consisted of the evaluation periods: 0, 3, 6, 9 and 12 days. The analyses were: firmness, soluble solids (SS), titratable acidity (TA), maturity index, pH, breathing behavior. In the end of this work it was concluded that the lower dose of radiation associated with modified atmosphere promoted positive effect on physical-chemical characteristics of guava ‘Pedro Sato’, providing fruits with higher quality and durability, due to higher maintenance of pulp firmness, the highest pH and soluble solids obtained. Regarding the storage days, there were no beneficial effect of the treatments during storage, mainly due to the sensitivity of fruits submitted to gamma irradiation, where only the early days provided better values for the variables.

Tratamento de caldo e tipos de fermentos sobre os componentes secundários e qualidade da cachaça de alambique

Pós-graduação em Microbiologia Agropecuária - FCAV

Modificação química de amido de mandioca e aplicação em emulsão

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fisiologia e bioquímica do tomateiro submetido à irrigação salina parcial do sistema radicular

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Desenvolvimento e aceitabilidade de compota de figo convencional e diet

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Emissão de gases do efeito estufa e estoque de carbono no sistema solo-planta em área com aplicação superficial de calcário e gesso em experimento de longa duração

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Consequências do corte periódico do componente lenhoso da vegetação de cerrado

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Qualidade da cachaça em função do tratamento do caldo e tipo de fermento

Pós-graduação em Microbiologia Agropecuária - FCAV

Óxidos derivados de hidromagnesitas e hidrotalcitas modificadas como catalisadores heterogêneos na síntese de biodiesel etílico

Pós-graduação em Química - IBILCE

Qualidade física e química do solo em função do sistema de produção e da aplicação superficial de silicato e calcário em experimento de longa duração

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação do soro de leite como coagulante do látex de borracha natural

Pós-graduação em Ciência dos Materiais - FEIS

Estudos experimentais e teórico-computacionais de novos complexos nanozeólitas-enzimas empregados na produção de biocombustíveis

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Quantificação de metais potencialmente tóxicos em mexilhão dourado (Limnoperna fortunei) por espectrometria de absorção atômica com fonte contínua e alta resolução empregando amostragem direta de sólidos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)