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de Sousa K.S.M.,Laboratorio Of Agroindustria | de Figueiredo R.M.F.,Bairro Universitario | Queiroz A.J.M.,Bairro Universitario | Fernandes T.K.S.,Instituto Federal Of Paraiba
Revista Brasileira de Fruticultura | Year: 2015

The atemoya has attracted increasing interest due to its aroma, flavor and market value. But like most fruits is quite perishable, making necessary the application of preservation methods, such as drying spray, which prolongs the shelf life, reduces the water activity and gets as final product the food powder. The objective this study was dehydrated the formulation prepared with 50% atemoya pulp + 50% distilled water, added 25% maltodextrin, in a spray dryer with inlet air temperature of 180°C, the feeding flow rate of 0.5 L h-1, air pressure of 30 kgf cm-2 and the nozzle diameter of 1.2 mm. As the final product, it was obtained two powder samples, one collected in the drying chamber and another in the cyclone, been these characterized physic, physico-chemically and morphologically. The experimental data on physico-chemical analyzes were analyzed by completely randomized design. Evaluating the results it is observed that the color of the sample powder collected in the drying chamber was darker than that of the cyclone; samples of atemoya powder collected in the drying chamber had a higher moisture content, pH, ascorbic acid, ash, sugars and proteins in relation to the powder samples collected in the cyclone and lower water activity, absolute density and apparent, moreover, the powder of the drying chamber is more soluble, has a higher porosity and large particles than that of the cyclone and in both sticky aggregates are formed. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.

De Oliveira F.T.,Instituto Federal Of Paraiba | Hafle O.M.,Instituto Federal Of Paraiba | Mendonca V.,Instituto Federal Of Paraiba | Moreira J.N.,Instituto Federal Of Paraiba | And 2 more authors.
Comunicata Scientiae | Year: 2015

The aim of this study was to evaluate the effect of different sources and proportions of organic materials on the growth of guava rootstocks. The experiment was carried out during the period of September 2010 to March 2011, in the Experimental Farm of the Instituto Federal de Educação, Ciência e Tecnologia da Paraíba, located in the São Gonçalo Irrigated Perimeter, Sousa-PB, northeastern Brazil. It was utilized a randomized complete-blocks experimental design, with the treatments arranged in a 3 x 4 factorial scheme, four replications, and ten plants per experiment unit. To the first factor it was assigned the organic sources (bovine manure, ovine manure, and earthworm humus) and to the second the proportions of these sources in the substrate (0, 20, 40, and 60% v v -1). We evaluated the shoot length, stem diameter, shoot dry mass, root system dry mass, total dry mass, shoot length/stem diameter ratio, shoot dry mass/system dry mass ratio and Dickson quality index. The incorporation of organic sources to substrate influenced in a positive way in the growth of the guava rootstocks. The substrate containing of earthworm humus, in the proportion of 40%, provided the production of rootstocks of higher quality.

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