• 한국식품영양과학회지
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• 제44권7호
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• pp.1100-1103
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• 2015

크랜베리 농축액의 첨가량을 0~15%로 달리하여 젤리를 제조한 후 물리화학적 품질, 항산화 특성 및 소비자 기호도를 비교하였다. 크랜베리 농축액의 첨가 비율이 증가함에 따라 젤리의 pH와 경도는 감소하였고, 가용성 고형분 함량은 증가하는 경향을 보였다(P<0.05). 밝기를 나타내는 $L^*$값은 농축액의 첨가량이 증가할수록 유의적으로 감소하였고, 적색도를 나타내는 $a^*$값은 현저하게 증가하였다(P<0.05). 황색도를 나타내는 $b^*$값은 농축액 첨가에 따라 현저하게 감소하였으나, 첨가 농도와 직접적인 연관관계는 발견되지 않았다. 한편 농축액의 첨가량이 증가함에 따라 항산화 활성을 나타내는 DPPH와 ABTS 라디칼 소거능은 유의적 차이를 나타내며 증가하였다(P<0.05). 소비자 기호도 검사 결과 6% 첨가군이 대부분의 평가항목에서 유의적으로 높은 점수를 얻었고, 특히 전체적인 기호도 측면에서도 유의적으로 가장 높게 평가되어 젤리의 관능품질과 건강기능성 효과 등을 고려할 때 최적 첨가 농도로 6%가 가장 적합한 것으로 판단된다.

• Asian-Australasian Journal of Animal Sciences
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• 제32권7호
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• pp.966-976
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• 2019

Objective: The methane mitigating potential of various plant-based polyphenol sources is known, but effects of combinations have rarely been tested. The aim of the present study was to determine whether binary and 3-way combinations of such phenol sources affect ruminal fermentation less, similar or more intensively than separate applications. Methods: The extracts used were from Acacia mearnsii bark (acacia), Vitis vinifera (grape) seed, Camellia sinensis leaves (green tea), Uncaria gambir leaves (gambier), Vaccinium macrocarpon berries (cranberry), Fagopyrum esculentum seed (buckwheat), and Ginkgo biloba leaves (ginkgo). All extracts were tested using the Hohenheim gas test. This was done alone at 5% of dry matter (DM). Acacia was also combined with all other single extracts at 5% of DM each, and with two other phenol sources (all possible combinations) at 2.5%+2.5% of DM. Results: Methane formation was reduced by 7% to 9% by acacia, grape seed and green tea and, in addition, by most extract combinations with acacia. Grape seed and green tea alone and in combination with acacia also reduced methane proportion of total gas to the same degree. The extracts of buckwheat and gingko were poor in phenols and promoted ruminal fermentation. All treatments except green tea alone lowered ammonia concentration by up to 23%, and the binary combinations were more effective as acacia alone. With three extracts, linear effects were found with total gas and methane formation, while with ammonia and other traits linear effects were rare. Conclusion: The study identified methane and ammonia mitigating potential of various phenolic plant extracts and showed a number of additive and some non-linear effects of combinations of extracts. Further studies, especially in live animals, should concentrate on combinations of extracts from grape seed, green tea leaves Land acacia bark and determine the ideal dosages of such combinations for the purpose of methane mitigation.