Studies on the Preparation and Utilization of Filefish Protein Concentrate (FPC) -IV. The Production and Characteristics of Bread using FPC-Wheat Composite Flour-

말쥐치 농축단백질(濃縮蛋白質)의 제조(製造) 및 이용(利用)에 관(關)한 연구(硏究) -제 4 보 : 말쥐취 농축단백질(濃縮蛋白質)-밀가루 복합분(複合粉)을 이용(利用)한 제빵시험(試驗)-

Experiments were performed to study the rheological and baking properties of bread fortified with various amounts of filefish protein concentrate (FPC). Doughs were prepared from mixtures containing wheat flour and 5,10,15 and 20% of FPC. Standard methods were used to evaluate the rheology of doughs and characteristics of bread. The results were as follows. 1. The water absorption of the fortified doughs increased as FPC increased. FPC caused an increase in development time and stability as measured by Farinograph. 2. In the extensigraph test, FPC yielded a decrease in extensibility and an increase in resistance to extension. 3. Baking tests demonstrated that addition of FPC decreased the volume of loaf and made the crumb darker and coarser. 4. Additional tests were made to examine effect of sodium stearoyl lactylate (SSL) added at 0.25, 0.50, 1.00 and 2.00% on doughs containing 10% headed & gutted FPC. The most appropriate amount of SSL as an additive was 0.5%. 5. In the farinograph, adding 0.5% SSL could delay dough development time and greatly increase stability. 6. When 0.5% SSL was added on doughs containing 5,10,15 and 20% headed & gutted FPC, baking quality was greatly improved. The breads containing up to 10% were acceptable by the addition of SSL, but not in higher level of FPC. 7. The results of sensory evaluations of bread showed that the color, texture and taste of bread containing 5% whole FPC and 5, 10% headed & gutted FPC were reasonably gacceptable.

File fish protein concentrate 를 5%, 10%, 15% 및 20%를 밀가루에 첨가한 복합분(複合粉)을 사용하여 반죽의 20%를 밀가루에 제빵적성을 조사 하였다. 그 결과를 요약(要約)하면 다음과 같다. 1. FPC를 첨가(添加)함에 따라 수분흡수율(水分吸收率)이 증가 하였고 farinograph에서 development time과 stability가 증가하는 경향을 나타냈다. 2. Extensigraph 측정에서는 FPC를 첨가함에 따라 신장력(伸張力)은 감소(減少)하고 신장저항력(伸張抵抗力)은 증가 하였다. 3. 제빵시 FPC를 첨가(添加)함에 따라 부피가 감소하고 crumb의 조직이 거철어지고 색택이 검어졌다. 4. Headed & gutted FPC 10%에 SSL(sodium stearoyl-2 lactlate) 0.25%, 0.50%, 1.00%, 2.00%를 첨가시험 하였을 때 SSL 0.50%에서 가장 효과적인 결과(結果)를 얻었다. 5. 0.5% SSL 첨가(添加)시 farinograph의 측정(測定)에서는 반죽형성기간이 지연되고 stability가 크게 증가(增加) 하였다. 6. Headed & gutted FPC 5%, 10%, 15%, 20%복합분에 SSL 0.5%를 첨가하였을 때, 10%까지는 그 제품성이 양호하게 개선(改善) 되었으나 그 이상 첨가할 경우에는 개선효과(改善效果)를 보지 못했다. 7. 관능검사(官能檢査) 결과(結果) whole FPC의 경우는 5%까지 headed & gutted FPC 의 경우는 10%까지 첨가 하였을 때 제빵가치가 있는 것으로 평가되었다.