Naslov
Novel browning formulation for fresh-cut apples

Autori
Sapers, Gerald M ; Piližota, Vlasta

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
16th Annual International Fresh-cut Produce Association (IFPA) Conference and Exhibition

Mjesto i datum
Tampa (FL), Sjedinjene Američke Države, 03.04.2003. - 05.04.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Browning inhibitor formulation; fresh-cut apples

Sažetak
Fresh-cut apples are subject to enzymatic browning, especially in residual core tissue, and must be treated with a browning inhibitor to prevent shelf-life limiting discoloration. This product does not receive a "kill" step and so may contain viable microorganisms including human pathogens such as Listeria monocytogenes. Preliminary studies indicated that L. innocua could survive in a neutral browning inhibitor solution but not when the solution was acidified. Our objective was to develop an acidic browning inhibitor formulation for fresh-cut apples that was effective in preventing core tissue discoloration. Granny Smith and Fuji apples were cored and cut into wedges, treated with acidic or neutral pH browning inhibitor dips, or with an acidic dip containing sodium hexametaphosphate. Samples were packaged in pouches to produce a modified atmosphere and observed during storage at 4 and 10°C for onset of core tissue browning. A pH 2.9 dip containing 2% ascorbic acid, 1% citric acid and 1% sodium hexametaphosphate was able to suppress core tissue browning in Granny Smith apples for at least 3 weeks at 4°C while comparable neutral and acidic formulations without hexametaphosphate failed within 1 week. Similar results were obtained with Fuji apples when the ascorbic acid concentration was increased to 3%. Tissue breakdown, a result of some phosphate-treatments, was observed only at 10°C, coincident with onset of core tissue browning. These results demonstrate that core tissue browning in fresh-cut apples can be controlled effectively with a browning inhibitor formulation unlikely to support long-term listerial survival or growth.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA