• 한국식품조리과학회지
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• 제22권6호통권96호
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• pp.905-913
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• 2006

The properties of water soluble powder of propolis(WSP), made with different levels(0, 20, 40, 60, 80%) of ethanol extract of propolis(EEP) and hydrocolloid were investigated, along with the quality changes of its bread after 7 days' of storage at $30^{\circ}C$ The yield of WSP containing 40% EEP treated at $160^{\circ}C$ was the highest at 59.3% and the brown color of all the powders tended to be darkened with increasing EEP content. The turbidity of WSP treated at higher temperature was decreased in its aqueous solution (10%, w/w), and this was considered to be due to the presence of minute nonsoluble particles. Antioxidative activities determined by DPPH(1,1-diphenyl-2-picrylhydrazyl) were the lowest in WSP treated at $140^{\circ}C$, while those of the WSP samples prepared at 160 and $180^{\circ}C$ were as high as that of WSP containing more than 40% EEP, regardless of EEP concentration. The propolis breads with added WSP made at $160^{\circ}C$ were selected as the most desirable powder for subsequent study. Bread with WSP40 was the heaviest while the volume loss of WSP80 was the greast after baking. The moisture contents of the propolis bread were drastically decreased until 3 days' of storage, but it was thought that WSP might be ineffective for the prevention of moisture loss. The pH of breads without EEP was decreased after 3 days' of storage, while that of the WSP breads remained almost unchanged until 5 days' of storage. Total bacterial counts also exhibited decay levels during the storage. In conclusion, water soluble powder of propolis is useful as a natural antioxidative and antibacterial material in various types of food.

• 한국식품과학회지
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• 제29권5호
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• pp.982-986
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• 1997

Propolis 추출물을 첨가하여(P1-1.48%, P2-0.74%, P3-0.37%) 식빵을 제조하고, 식빵의 선도와 품질유지에 관계하는 항균성과 노화방지 효과 및 관능특성을 살펴보았다. propolis가 첨가된 P1, P2, P3 식빵시료 모두 곰팡이의 생장이 억제되었으며, propolis의 첨가량이 많을수록 저해효과도 증가하였다. 식빵의 저장중 노화속도는 P1, P2, P3가 대조구에 비하여 각각 22.5%, 19.2% 및 6.4%씩 지연효과가 있었으며, Avrami 지수는 정수 1에 가까운 값을 보였다. 관능검사 결과 P2와 P3가 대조구와 비교시 식빵의 향미, 이취, 조직감, 전체적인 기호성에 있어서 유의적인 차이를 보이지 않았다.