논문 상세보기
pp.302-308
양파의 일시 대량 처리가 가능한 oleoresin 가공을 시도하여 추출율과 품질 안정성을 고려한 제조조건을 검토하였다. 시료의 일반성분 조성은 수분 88.9%, 조단백질 1.97%, 조지방 0.51%, 탄수화물 8.12% 및 조회분 0.48%였고 total pyruvate 함량은 743.8㎍/g이었다. 생채양파 액즙을 Brix 70%로 감압농축하고 남은 잔사를 ethyl alcohol로 추출·농축하여 합한 제품, 양파를 가압열처리후 동일한 방법으로 제조한 제품 및 동결건조하여 50 mesh로 마쇄시킨 양파를 ethyl alcohol로 추출·농축한 제품의 수율은 각각 7.3, 9.1 및 0.8%이었으며, 총당함량은 각각 616.4, 712.3 및 150.3㎎/g으로 ethyl alcohol 추출제품은 수율과 유리당의 함량이 매우 낮았다. 그리고 overall odor intensity의 지표로서 total pyruvate 함량은 각각 1, 733.7, 520.6 및 2, 716.5㎍/g으로 가압 열처리하여 추출한 제품의 경우는 열처리과정에서 향기성분의 소실이 심하였다. 이상의 결과에서 양파 oleoresin 제조는 수율과 총당함량은 약간 낮으나 oleoresin의 품질을 크게 좌우하는 향기성분의 회수가 뛰어난 생채양파를 직접 사용하는 방법이 바람직하였다. 양파액즙 농축액과 용매추출물의 균일한 혼합을 위하여 2% PGDR(polyglycerol condensed ricinoleate)을 첨가하고 교반(10, 000rpm, 30분)하여 유화시켰다. 이때 계면장력은 1.9 dyne/㎝였고, 60℃에서 24시간 방치시켰을 때 유화된 emulsion 생성율은 96.2%, 유화후 원심분리(2, 000×G, 80분)시켰을 때 분리되지 않는 emulsion층의 부피는 92.6%로 유화안정성이 매우 높았다. 대두유 및 참깨유에 양파 oleoresin을 1% 첨가하여 가열산화를 유도시켰을 때의 유도기간 연장효과는 0.02% BHA를 첨가한 효과에 대하여 80.8∼82.2%에 해당하는 항산화 활성을 나타내었다.
The purpose of this study was to investigate the extraction yield and quality stability as to the oleoresin process with large amount of onion at one time. The first mixed-product is raw onion juice which was reduced the compression and concentrated by Brix 70% mixed together with the residue which was extracted and concentrated by ethanol, the second product manufactured by the same method above after the autoclaving with onion, and the other product is made by grinding by 50mesh to freeze-dried onion. Each of yields were 7.3, 9.1 and 0.8% and each of total sugar content was 616.4, 712.3 and 150.3㎎/g. Therefore the product extracted by ethanol from freeze-dried onion was very low in yield and total sugar content. By the index of the overall odor intensity, contents of total pyruvate were 1, 733.7, 520.6, and 2, 716.5㎍/g for each product. As a result, oleoresin onion processing that desired to use raw onion was remarkable for odor recovery. For the homogenous mixture with concentrate of onion juice and ethanol extract were emulsified by the addition of 2% of PGDR(polyglycerol condensed ricinoleate) and agitation(10, 000rpm, 30 minutes). At this time, interfacial tension was 1.9 dyne/㎝ and the formation of emulsion was for 96.2% when left over 24hours in 60℃. When it was to be centrifuged(2, 000×G, 80 minutes) after emulsification, the volume of emulsion level without seperation was 92.6%, and very high in emulsification stability. The induced heating-oxidize with soy bean oil and sesame oil added to 1% of onion oleoresin, induction-time extension effect appeared with antioxidant activity that was applicable for 80.8∼82.2% as to the effect of addition of 0.02% BHA.
