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- W2254972562 abstract "Research was conducted to elucidate the cause of past fungal contamination experienced by local dairy processors in ultra-pasteurized, extended shelf life (ESL) fluid dairy products. Previous research at the Virginia Tech Department of Food Science and Technology indicated paperboard packaging as a potential source of fungi found spoiling the product. Preliminary research to isolate naturally occurring fungi from paperboard containers produced by various manufacturers found fungi to occur infrequently and sporadically. Migration of Penicillium spinulosum from paperboard to milk during an extended shelf life, 60 days, was investigated through the inoculation of condia (spores) into paperboard test-squares created from gable-top carton flats designed for extended shelf life milk. These 57.2 by 57.2 mm (2 1⁄4 by 2 1⁄4 in.) test squares were sealed on three sides with melted paraffin wax, inserted with a steel pin at 3.2, 6.4, 9.5 and 12.7 mm from the uncoated edge (unskived edge) and sterilized by gamma-irradiation. A stock solution of P. spinulosum was injected at these four distances and the injection site sealed with melted paraffin wax. The squares were then incubated at 7°C in ultra-pasteurized skim milk for 60 days, allowing wicking of the milk to occur. An inverse relationship was seen between distance from the uncoated edge and presence of the organism in the surrounding milk. The percentage of milk samples containing P. spinulosum was 84% at 3.2 mm, 72% at 6.4 mm, 50% at 9.5 mm, and 28% at 12.7 mm from the uncoated edge. Survival of P. spinulosum in paperboard was investigated in two different studies. First, a study of survival over time used paperboard test-squares, which were inoculated, sealed on all four sides with paraffin wax and incubated as in the migration study in ultra-" @default.
- W2254972562 created "2016-06-24" @default.
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- W2254972562 date "1999-10-08" @default.
- W2254972562 modified "2023-09-27" @default.
- W2254972562 title "Migration of Penicillium spinulosum from Paperboard Packaging to Extended Shelf Life Milk" @default.
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