29 research outputs found

    Modified Atmosphere/Modified Humidity Packaging for Preserving Pomegranate Fruit during Prolonged Storage and Transport

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    1st International Symposium on Pomegranate and Minor Mediterranean Fruits -- 39892 -- Adana, TURKEYWOS: 000305456400044The limiting factors for prolonged storage of pomegranates are weight loss and shrinkage, decay, appearance of skin blemishes (especially scalds), and impaired quality and taste. Modified atmosphere packaging is a simple and low-cost method that has been proven to alleviate these problems and maintain fruit quality for 3-4 months after harvest. For periods of less than 4 weeks storage, fruit can be held naked in cold storage without any need for modified atmosphere. For moderate storage periods of up to 10 weeks after harvest, it is recommended to pack fruit either in Xtend (R) Easy-Tear or in regular Xtend (R) modified atmosphere/modified humidity (MA/MH) bags in 4-5 kg export cartons. The Xtend (R) Easy-Tear bags contain a notch, which allows the final user to easily tear and remove the top part of the bag for retail display in cartons. The main advantage of packing fruit in Xtend (R) bags within cartons is that the bag maintains fruit quality not only during the storage period, but also during subsequent shipment and marketing. For storage periods of up to 3-4 months after harvest, it is recommended to pack fruit in Xtend (R) 20 kg bulk bags in plastic crates or in Xtend (R) 80kg bulk bags. This strategy is optimal for storage of large volumes of fruit for long periods but necessitates resorting and removing damaged fruit after storage before repacking. It is recommended that fruit stored in bulk Xtend (R) bags in crates or bins be repacked in Xtend (R) 4-5 kg bags prior to shipment and marketing. In this way MA storage conditions are maintained throughout the entire storage and supply chain

    Modified atmosphere / modified humidity packaging for preserving pomegranate fruit during prolonged storage and transport

    No full text
    The limiting factors for prolonged storage of pomegranates are weight loss and shrinkage, decay, appearance of skin blemishes (especially scalds), and impaired quality and taste. Modified atmosphere packaging is a simple and low-cost method that has been proven to alleviate these problems and maintain fruit quality for 3-4 months after harvest. For periods of less than 4 weeks storage, fruit can be held naked in cold storage without any need for modified atmosphere. For moderate storage periods of up to 10 weeks after harvest, it is recommended to pack fruit either in XtendÂź Easy-Tear or in regular XtendÂź modified atmosphere/modified humidity (MA/MH) bags in 4-5 kg export cartons. The XtendÂź Easy-Tear bags contain a notch, which allows the final user to easily tear and remove the top part of the bag for retail display in cartons. The main advantage of packing fruit in XtendÂź bags within cartons is that the bag maintains fruit quality not only during the storage period, but also during subsequent shipment and marketing. For storage periods of up to 3-4 months after harvest, it is recommended to pack fruit in XtendÂź 20 kg bulk bags in plastic crates or in XtendÂź 80kg bulk bags. This strategy is optimal for storage of large volumes of fruit for long periods but necessitates resorting and removing damaged fruit after storage before repacking. It is recommended that fruit stored in bulk XtendÂź bags in crates or bins be repacked in XtendÂź 4-5 kg bags prior to shipment and marketing. In this way MA storage conditions are maintained throughout the entire storage and supply chain

    Hindered Convection of Macromolecules in Hydrogels

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    Hindered convection of macromolecules in gels was studied by measuring the sieving coefficient (Θ) of narrow fractions of Ficoll (Stokes-Einstein radius, r(s) = 2.7–5.9 nm) in agarose and agarose-dextran membranes, along with the Darcy permeability (Îș). To provide a wide range of Îș, varying amounts of dextran (volume fractions ≀ 0.011) were covalently attached to agarose gels with volume fractions of 0.040 or 0.080. As expected, Θ decreased with increasing r(s) or with increasing concentrations of either agarose or dextran. For each molecular size, Θ plotted as a function of Îș fell on a single curve for all gel compositions studied. The dependence of Θ on Îș and r(s) was predicted well by a hydrodynamic theory based on flow normal to the axes of equally spaced, parallel fibers. Values of the convective hindrance factor (K(c), the ratio of solute to fluid velocity), calculated from Θ and previous equilibrium partitioning data, were unexpectedly large; although K(c) ≀ 1.1 in the fiber theory, its apparent value ranged generally from 1.5 to 3. This seemingly anomalous result was explained on the basis of membrane heterogeneity. Convective hindrances in the synthetic gels were quite similar to those in glomerular basement membrane, when compared on the basis of similar solid volume fractions and values of Îș. Overall, the results suggest that convective hindrances can be predicted fairly well from a knowledge of Îș, even in synthetic or biological gels of complex composition
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