Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Physicochemical properties of spray-dried rice flour with Lactobacillus plantarum CGKW3

분무건조공정을 이용한 유산균포집 미분의 제조 및 물리화학적 특성

  • Park, Hye-Mi (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Lee, Dae-Hoon (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Jeong, Yoo-Seok (Biohealth Convergence Center, Daegu Technopark) ;
  • Jung, Hee-Kyoung (Biohealth Convergence Center, Daegu Technopark) ;
  • Cho, Jae-Gon (Young Poong Co.) ;
  • Hong, Joo-Heon (Department of Food Science and Technology, Catholic University of Daegu)
  • 박혜미 (대구가톨릭대학교 식품공학전공) ;
  • 이대훈 (대구가톨릭대학교 식품공학전공) ;
  • 정유석 ((재)대구테크노파크 바이오헬스융합센터) ;
  • 정희경 ((재)대구테크노파크 바이오헬스융합센터) ;
  • 조재곤 (농업회사법인 (주)영풍) ;
  • 홍주헌 (대구가톨릭대학교 식품공학전공)
  • Received : 2015.03.24
  • Accepted : 2015.05.23
  • Published : 2015.06.30
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Abstract

The physicochemical properties of spray-dried rice flour with Lactobacillus plantarum CGKW3 were investigated. Amylose and damaged starch contents of spray-dried rice flour (S10, S20, S30, and S50) with L. plantarum CGKW3 were 14.18~17.75% and 24.65~34.08%, respectively. The particle size of spray-dried rice flour was $82.28{\sim}131.17{\mu}m$. The rice flour with L. plantarum CGKW3 showed a good powder flowability. The water absorption and water solubility of spray-dried rice flour were 1.96~2.13 and 9.91~21.95%, respectively. Thermal properties measured by differential scanning calorimeter revealed that the enthalpy (${\Delta}H$) for starch gelatinization were highest in the rice flour (S50) with L. plantarum CGKW3. When compared, the viable cell number of spray-dried rice flour were found to be in the following order: S10 (5.78 log CFU/g) < S20 (6.38 log CFU/g) < S30 (6.69 log CFU/g) < S50 (7.11 log CFU/g). The survaival rate of L. plantarum CGKW3 was 60.02-73.85%, which reflected the improvement in the quality of rice flour with an increase in treatment concentration. Based on our results, spray-dried rice flour with L. plantarum CGKW3 could be used in various types of rice foods.

본 연구에서는 국내 쌀의 소비를 증가시키고 쌀 가공제품 개발시 기능성 및 가공적성이 향상된 미분을 제공하고자 분무건조공정에 의해 유산균을 포집한 미분을 제조하였으며 유산균포집 미분의 품질특성 및 유산균 생존율을 조사하였다. 유산균포집 미분의 제조는 미분을 24시간 배양한 유산균 배양액 대비 각각 10%, 20%, 30% 및 50%(w/v)을 첨가하여 분무건조하였다. 유산균포집 미분의 아밀로오즈함량 및 손상전분함량은 각각 14.18~17.75% 및 24.65~34.08%이었다. 유산균포집 미분의 입자크기는 $82.28{\sim}131.17{\mu}m$로 미세캡슐로 제조되었음을 확인하였으며, 전반적으로 구형의 모양을 보여주어 분말 흐름성이 양호할 것으로 판단된다. 수분함량의 경우 유산균을 첨가하지 않은 미분(3.34%)에 비하여 유산균포집 미분이 2.32~2.62%로 유의적으로 낮은 함량을 나타내었으며, 수분흡수지수 및 수분용해지수 측정결과 유산균포집 미분제조시 흡습성이 낮고 용해성이 양호한 분말을 얻을 수 있을 것이라 판단된다. 시차주사열량계에 의한 호화특성을 측정한 결과 유산균포집 미분에서 호화에 필요한 호화엔탈피가 높아 취반 특성이 높을 것으로 사료된다. 유산균포집 미분의 유산균 포집특성을 확인한 결과, 미분의 첨가량이 높아질수록 60.02~73.85%로 유의적으로 높은 유산균 생존율을 보여주어 높은 안정성을 나타내는 것으로 확인되었다. 특히, 50% 미분을 첨가한 유산균포집 미분의 유산균수, pH 및 산도는 각각 7.11 log CFU/g, pH 4.11 및 0.31%이었으며, 이를 통해 기능성이 향상된 유산균포집 미분을 제공할 수 있을 것으로 판단된다. 따라서 분무건조공정을 이용한 유산균포집 미분은 쌀 가공제품 개발시 기능성 및 가공적성이 향상된 미분의 제조가 가능하고 유산균 안정성이 우수하여 기능성 식품 소재 개발에 있어 산업적으로 적용 가능할 것으로 사료된다.

Keywords

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