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Observation for drying non-uniformity of allium vegetables using NIR spectroscopy

근적외 분광법을 이용한 양념 야채의 건조 불균일성 관찰

  • Cho, Hyeong Ho (Department of Applied Biosciences, Kyungpook National University) ;
  • Lee, Seon Mi (Department of Applied Biosciences, Kyungpook National University) ;
  • Park, Sang Wook (Department of Applied Biosciences, Kyungpook National University) ;
  • Cho, Rae Kwang (Department of Applied Biosciences, Kyungpook National University)
  • 조형호 (경북대학교 응용생명과학부) ;
  • 이선미 (경북대학교 응용생명과학부) ;
  • 박상욱 (경북대학교 응용생명과학부) ;
  • 조래광 (경북대학교 응용생명과학부)
  • Received : 2014.08.31
  • Accepted : 2014.12.03
  • Published : 2014.12.30

Abstract

In this study, near-infrared spectroscopy was used to observe the drying non-uniformity of vegetables such as spring onions, onions, and garlic, which are commonly used for seasoning. For the warm-air convection drying method, the vegetables showed drying non-uniformity, which is due to the unevenness of the wind temperature and humidity depending on the height and position of the drying tray. The second derivative spectra between the vegetable samples with different drying degrees were compared. The peak at around 1,390~1,400 nm, which is assigned to weak hydrogen bonds of water, was changed during drying whereas the peak near 1,420 nm, which represents strong hydrogen (H-) bonds of water, was not changed, indicating that water with weak H-bonds evaporates first during drying, and that water with strong H-bonds remains after drying. The hyperspectral NIR imaging technique combined with principal-component analysis made it possible to discriminate the dried vegetables according to their drying degree.

본 연구에서는 근적외 분광법을 이용하여 양념용 채소로 많이 사용되는 파, 마늘, 양파의 건조 불균일성을 관찰하였다. 대류식 온풍건조기에서 건조 위치에 따른 양념채소류의 건조 상태 차이를 조사한 결과, 건조 트레이의 높이나 위치에 따라 바람의 온도와 습도에 차이가 발생하여 건조가 균일하게 되지 않았다. 건조 정도가 다른 양념채소류의 2차 미분 근적외 스펙트럼을 비교한 결과 1,390 nm에서 1,400 nm 부근의 수소결합이 약한 물이 먼저 증발되었고 1,420 nm 부근의 수소결합이 강한 물은 건조 후에도 잔존함을 관찰할 수 있었다. 초분광 NIR 이미징 기법으로 측정한 스펙트럼을 주성분분석함으로써 건조채소의 건조도를 가시적으로 판별할 수 있었다.

Keywords

References

  1. Kim MY (1996) Increment of freeze-drying rate by control of freezing rate and relationship between transport properties and freezing rate. Final Report of KOSEF, GOVP 1199602826, p 8-20
  2. Kim HD, Ha IJ, Park TY, Moon JS, Hwang SK, Lee SY, Song JK, Lee SD (2009) Effect of drying period and storage temperature on storage quality of onion (Allium Cepa L.). Korean J Hort Sci Tech, 27, 74
  3. Choi BO (2011) Study of supply & demand and price stabilization of vegetables. Final Report of KREI, KREI R654
  4. Park BG (2009) Effects of preharvest treatment and hot air drying on garlic storage ability. MS Thesis, Andong University, Andong, Korea, p 10-19
  5. Lee MH (1994) Studies on the allicin component change of a plant of allium genus in the freeze drying process. Paper presented at Spring symposium of Korean J Agric Chem Biot, 20, Gwangju, Korea
  6. Kim KS (2005) Comparison of volatile organic components in fresh and freeze dried garlic. J Korean Soc Food Sci Nutr, 34, 885-891 https://doi.org/10.3746/jkfn.2005.34.6.885
  7. Lim SY, Jang JR, Kim KK (2008) Anticancer and antioxidant effects of solvent extracts from dried onion with different drying methods. J Life Sci, 18, 1271-1277 https://doi.org/10.5352/JLS.2008.18.9.1271
  8. Lee GH (2006) Study on the drying characteristics of agricultural products during fluidized bed drying. J Bio Sys Eng, 31, 416-422 https://doi.org/10.5307/JBE.2006.31.5.416
  9. Kim HR, Seog EJ, Lee JH, R JW (2007) Physicochemical properties of onion powder as influenced by drying methods. Korean J Food Nutr, 36, 342-347 https://doi.org/10.3746/jkfn.2007.36.3.342
  10. Telis VRN, Sobral PJA (2002) Glass transitions for freeze-dried and air-dried tomato. Food Res Int, 35, 435-443 https://doi.org/10.1016/S0963-9969(01)00138-7
  11. Ratti C (2001) Hot air and freeze-drying of high-value foods : a review. J Food Eng, 49, 311-319 https://doi.org/10.1016/S0260-8774(00)00228-4
  12. Sarsavadia PN, Sawhney RL, Pangavhane DR, Singh SP (1999) Drying behavior of brined onion slices. J Food Eng, 40, 219-229 https://doi.org/10.1016/S0260-8774(99)00058-8
  13. Cho RK, Lee KH, Lee JH, Kwon YK (1994) A study for automatic analysis of qualysis of quality components in tabacco leaves using nondestructive analytical method. Agr Chem Bio, 37, 349-355
  14. Hong P (2007) Nondestructive measurement of nitrogen in rice leaves using near infrared spectroscopy. MS Thesis, Kyungpook National University, Daegu, Korea, p 8-18
  15. Cho RK, Sohn MR, Kwon YK, Lee KH, Park WC (1998) Possibility of the nondestructive quality evaluation of apples using near infrared spectroscopy. J Korean Soc Appl Bio Chem, 41, 153-159
  16. Lin GL (2001) Development of nondestructive evaluating method for Panax ginseng quality using near infrared spectroscopy. Ph D Thesis, Kyungpook National University, Daegu, Korea, p 1-7
  17. Gwon YG (1999) Identification of geographical origin of sesame seeds by near infrared spectroscopy. Ph D Thesis, Kyungpook National University, Daegu, Korea, p 17-25
  18. Kim MS (2014) Spectral imaging technologies for safety and quality evaluations of food products. Paper presented at 4th Asian Near Infrared Symposium, June 17, Daegu, Korea
  19. Cho BK (2014) Near infrared spectral imaging for quality measurement of food and agricultural materials. Paper presented at 4th Asian Near Infrared Symposium, June 17, Daegu, Korea
  20. RDA (2011) Food composition table 8th revision. Rural Development Administration, Suwon, Korea, p 134-181
  21. Iwamoto M, Kawano S, Ozaki Y (1995) An overview of research and development of near infrared spectroscopy in Japan. J Near Infrared Spectrosc, 3, 179-189 https://doi.org/10.1255/jnirs.68
  22. Carter GA (1991) Primary and secondary effects of water content on the spectral reflectance of leaves. American J Botany, 78, 916-924 https://doi.org/10.2307/2445170
  23. Osborne BG, Fearn T (1986) Near infrared spectroscopy in food analysis. Longman Scientific Technical, USA, p 36-40
  24. Kim EY (2013) NIR observation on the hydrogen bonding water remained in sesame seeds after roasting. NIR news, 24, p 15-16
  25. Buning-Praue H (2003) Analysis of water in food by near infrared spectroscopy. J Food Chem, 82, 107-115 https://doi.org/10.1016/S0308-8146(02)00583-6
  26. Mahesh S, Jayas DS, Paliwal J, White NDG (2011) Identification of wheat classes at different moisture levels using near-infrared hyperspectral images of bulk samples. Sens & Instrumen Food Qual, 5, 1-9 https://doi.org/10.1007/s11694-010-9104-2
  27. Park ES, Cho BK (2014) Development of drought stress measurement method for red pepper leaves using hyperspectral short wave infrared imaging technique. Protected Hort Plant Fac, 23, 50-55 https://doi.org/10.12791/KSBEC.2014.23.1.050

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