Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Effects of Pulsed Electric Fields on Juice Expression Characteristics of Malus pumila Fruit

고전압 펄스 전기장 처리가 사과의 착즙 특성에 미치는 영향

  • Received : 2012.06.26
  • Accepted : 2012.09.07
  • Published : 2012.10.30
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Abstract

The effects of pretreatment by pulsed electric fields (PEFs) on the juice expression characteristics of the Malus pumila fruit were investigated. Fresh fruits were divided into quarters, were produced on a laboratory scale (100 g apples per lot) by pretreatment with electric fields at two different field intensities (1, 2 kV/cm; n=50, 100, 200, and 400 pulses), and were then pressed at room temperature. Relative to the control samples, the juice yield increased with increasing field intensities. The total phenolics and antioxidant activity were higher in the juice from the PEF-treated fruit than in the juice from the untreated fruit. There was no significant difference in soluble-solid and reducing sugar contents between the PEF-treated and untreated fruits. These results suggest that PEF pretreatment may be useful for increasing the juice yield, total phenolics, and antioxidant activity of the Malus pumila fruit.

사과의 착즙 특성에 고전압 펄스 전기장 전처리가 미치는 영향을 조사하기 위하여, 사과를 다양한 PEF 조건하에서 처리하여 착즙수율과 주스의 품질특성을 조사하였다. 주스의 착즙수율은 PEF 처리구가 무처리구에 비하여 유의적으로 높은 수준을 나타내었다. 압착주스의 총 페놀함량 및 항산화활성은 무처리구에 비하여 유의적인 증가를 나타내었으나, 가용성 고형분 및 환원당 함량은 처리구와 무처리구의 유의적인 차이를 나타내지 않았다. 고전압 펄스 전기장 전처리는 사과 주스의 영양적인 가치와 착즙 효율을 증대시킬 수 있는 방법으로 보여지며 다양한 연구를 통하여 적정 처리 조건의 도출이 필요할 것으로 확인되었다.

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References

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