Abstract
Pound cakes were prepared with Citrus mandarin powder(CMP) cultivated in JeJu Island, Korea. The impact of CMP amount level, which was incorporated into wheat flour by the ration of 0, 5, 10, 15, and 20% based on a flour weight, on the rheology and sensory profile of the pound cakes was measured. Moisture content of 13.70%, crude protein 5.12%, crude lipid 1.30%, crud ash 1.92%, respectively. Also evaluation was performed on the changes in physicochemical properties of the pound cakes during storage at 4 and $30^{\circ}C$. According to the amylogram, gelatinization temperature of the control dough was $63.35^{\circ}C$ and those of the dough with CMP were $63.85{\sim}66.55^{\circ}C$. Maximum viscosity of the dough was 686 B.U in the control, those were 575 B.U, 553 B.U, 504 B.U and 401 B.U in the dough with 5, 10, 15, and 20% CMP, respectively. The retrogradation degree(setback value) of CMP dough was $31{\sim}57%$ lower than that of the control dough under the same conditions. Water holding capacity of pound cake was increased gradually in proportion to the amount of CMP. The CMP addition decreased the brightuess(L) of pound cakes but increased redness(a) and yellowness(b). Hardness of pound cakes was significantly increased by CMP addition, while springiness, adhesiveness and cohesiveness were decreased. Based on sensory evaluation, pound cakes added with CMP were not significantly different in color and texture, while that of 10% CMP was significantly high in taste, flavor, and overall preferences, compared to the control. pH of pound cake with CMP was decreased during storage, showing that pH of CMP samples was lower than the control. Titrated acidity of pound cake with CMP was increased rapidly from storage for 10 days, which the changes in degree was fast in accordance with CMP amount. The Hunter's color value of pound cake with CMP was decreased, as the storage time proceeded. In the samples prepared with CMP, the firmness, adhesiveness, gumminess and chewiness was increased as the storage time proceeded, while springiness and cohesiveness was decreased.
감귤 분말을 첨가한 파운드케이크의 특성을 분석하기 위하여 감귤 분말의 일반 성분과 품질 특성 결과는 다음과 같았다. 감귤 분말의 수분 함량은 13.72%, 조단백질 함량은 5.22%, 조지방 함량은 1.31%, 조회분 함량은 1.94%로 나타났다. 파운드케이크의 수분 함량은 대조군이 28.87%, 감귤 분말$5{\sim}20%$ 첨가구가 $28.75{\sim}29.62%$로, 수분 함량의 차이가 없었고, 대조구에 비하여 조단백질, 조지방 함량은 감소하였고, 조회분 함량은 증가하였으며, 조지방 함량에서만 유의적인 차이가 있었다(p<0.05). 감귤 분말을 첨가한 Amylograpm 호화 특성 중 호화 개시 온도는 감귤 분말 첨가량이 증가할수록 높게 나타났고, 최고 점도는 대조군이 686.00 B.U.로 가장 높았으며, 감귤 분말 20% 첨가구는 401.00 B.U.로 감귤분말 첨가량이 증가할수록 낮게 나타났다. Breakdown은 감귤분말 10% 첨가까지는 증가했으나 그 이상의 첨가량에서는 감소하였으며, setback 값은 감귤 분말 첨가량이 증가할수록 감소하는 특징을 나타내었다. 색도 측정 결과 감귤 분말 첨가량이 증가할수록 L값은 감소하였고 a값과 b값은 증가하였다. 조직감은 대조구에 비하여 감귤 분말 첨가량이 증가할수록 견고성은 높게 나타났고, 부착성과 응집성, 탄력성은 낮았으며 시료간에 유의한 차이가 있었다. 관능검사 결과, 색깔, 입안의 느낌, 부푼 정도 및 질감에 대한 기호도는 대조구에서 가장 높았고, 맛, 향미 및 전체적인 선호도에서는 감귤분말 10% 첨가구에서 가장 높게 나타났다. pH는 저장 기간이 경과할수록 모든 시료구에서 pH가 낮아졌으며, 대조구보다 감귤 분말 첨가구가 더 낮게 나타났다. 적정 산도는 10째부터 급격히 증가하였고 감귤 분말 첨가량이 많을수록 변화의 폭이 컸다. 저장 중 색도의 변화는 저장 기간이 경과함에 따라 모든 시료구에서 L값, a, 값, b값은 감소되었다. 저장 중 조직감은 견고성, 부착성, 점착성 및 씹힘성은 저장 기간이 길어질수록 증가하였고, 탄력성과 응집성은 감소하는 경향을 나타내었다.
(Dept. of Hotel Culinary Arts, Jeju Halla College)
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