Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Process Development of Red Ginseng Production by Microwave-assisted Low Temperature Vacuum Dry and Characteristics of Products

마이크로파 저온진공건조 기술을 이용한 홍삼제조공정 개발 및 제품특성에 관한 연구

  • Lee, Sang-Ho (Department of Herbal Resources, Joongbu University) ;
  • Ji, Joong-Gu (Department of Oriental Health Care, Joongbu University)
  • 이상호 (중부대학교 한약자원학과) ;
  • 지중구 (중부대학교 한방건강관리학과)
  • Received : 2017.05.25
  • Accepted : 2017.06.28
  • Published : 2017.06.30
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Abstract

The purpose of this study was to develop the high efficiency of ginseng by using microwave low temperature vacuum drying technology. In red ginseng manufacturing processes, the study results compared the hot-air drying red ginseng dried during 24hours in $60-70^{\circ}C$ and redried during 72hours in $40^{\circ}C$ after the steaming ginseng with the red ginseng dried in microwave low temperature vacuum dryer on condition that 900 watt, 2.45 MHz, 50 mmHg during 5 hours and redried during 2 hours on 750 mmHg after the steaming ginseng about observation of tissue, sensory evaluation and a change of ginsenoside and crude saponin content. As a result, the red ginseng in microwave low temperature vacuum was had high brightness, the surface turned into porosity tissue and added more flavor, decreased bitterness highly on the contrary increased sweetness at the same time that elevated the comprehensive preference. Moreover, In a short time, the content of ginsenosides $Rg_1$ and $Rb_1$ increased about sixfold, eightfold in one time zone but there were no wide difference in content of $Rg_3$ as compared to the hot-air drying red ginseng. Finally, content of crude saponin was increased widely at 10-20 minutes and stayed high crude saponin content consistently. Therefore, this result indicated that the red ginseng in microwave low temperature vacuum increased extraction yields of the ginsenosides and crude saponin through a change of porosity tissue and improved flavor and texture compare with the general hot air dried red ginseng in a short time. According to these results, that provided that could increase the preference about red ginseng.

본 연구는 마이크로파 저온진공건조 기술을 이용하여 고효율 인삼개발을 하고자 하였다. 홍삼 제조 공정에서 증삼 후 $60-70^{\circ}C$에서 24시간 동안 건조하고 다시 $40^{\circ}C$에서 72시간동안 건조한 열풍 건조 홍삼과 증삼 후 마이크로파 저온진공건조기에서 900 watt, 2.45 MHz, 50 mmHg 조건으로 5시간동안 건조하고 다시 750 mmHg로 2시간동안 건조한 홍삼으로 조직 관찰, 관능평가, 진세노사이드 및 조사포닌 함량 변화 등을 비교하였다. 그 결과, 마이크로파 저온진공 홍삼은 색도가 밝은 색으로, 표면적은 다공성 조직으로 변화하였으며, 향미를 높이고 쓴 맛을 크게 감소시킴과 동시에 단 맛을 증가시켜 종합적인 선호도를 높였다. 또한, 단시간에 진세노사이드 $Rg_1$과 $Rb_1$ 함량을 열풍 건조 홍삼에 비해 1시간대에서 약 6배, 8배가 증가되었으나, $Rg_3$ 함량에서는 큰 차이가 나타나지 않았다. 마지막으로 조사포닌 함량은 10-20분대부터 크게 증가하여 이후 지속적으로 높은 함량이 나타났다. 이와 같은 결과를 종합해보면, 마이크로파 저온진공홍삼은 열풍 건조 홍삼에 비해 다공성 조직 변화를 통해 단시간에 진세노사이드 및 조사포닌에 대한 추출 수율을 높이고 향미와 식감을 개선시켜 홍삼에 대한 선호도를 높일 수 있음을 확인되었다.

Keywords

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