【机械类文献翻译】保持微创新鲜已加工果蔬的微生物和感官质量的新兴技术

机械专业中英文文献翻译

文献翻译

（20**届本科）

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20**年5 月

Emerging technologies for keeping microbial and sensory quality of minimally fresh processed fruits and vegetables

The emphasis in post-harvest fruit protection against quality attributes losses, physiological disorders, diseases and insects has shifted from using agro-chemicals to various alternative techniques, including biological control, cultural adaptations and physical methods such as controlled atmosphere (CA), MAP and irradiation. Given the restrictions of chemical use in plant foods and because many of them cause ecological problems or are potentially harmful to humans and may be withdrawn from use, the advantage of these alternative techniques is that no chemicals are involved (Artés, 1995; Graham and Stevenson, 1997; Reddy et al., 1998; Mathre et al., 1999; Sanz et al., 1999; Daugaard, 2000; Harker et al., 2000; Marquenie et al., 2003). Additionally, preservation techniques are becoming milder in response to demands of consumers for higher quality, more convenient foods that are less heavily processed and preserved and less reliant on chemical preservatives (Abee and Wounters, 1999).

The unique way to assure microbial and sensory quality of minimally fresh processed plant products relies on refrigerated storage and distribution, although combination of refrigeration and subinhibitory preservation techniques could prolong their shelf-life.

As mentioned above, many non-conventional methods are now being investigated; however, there are some limitations to their application since some methods are not applicable to fresh-cut fruits and vegetables because of damage to plant tissue but only to liquid foods such as fruit juices (Carlin and Nguyen-the, 1997). Therefore, in this section those techniques that can be used to preserve fresh processed plant foods will be revised.

The most critical step in the production chain of minimal fresh processing of fruits and vegetables is washing-disinfection. For this reason, special attention to the alternative sanitizing agents as well as the new technologies for disinfection of these commodities will be given. To develop or improve washing and sanitizing treatments, special attention should be paid to the compatibility of treatments with commercial practices, cost, absence of induced adverse effects on product quality and the need for regulatory approval and consumer acceptance (Sapers, 2001). Some alternatives to sanitizing agents are: O3, ClO2, peracetic acid (about 90–100 ppm), H2O2, organic acids (acetic, lactic, citric, malic, sorbic and propionic acids at 300–500 mg/ml), electrolysed water, radio frequency, hot water treatments and UV-C radiation (Adams et al., 1989;