This study was aimed to develop a gruel using rice extrudates and to evaluate physicochemical properties of Tarakjuk (milk porridge; MP) prepared with milk (M) and rice powder (RP, control), rice extrudate (RE), or enzyme treated rice extrudates (ETR). Pasting property of ETR was significantly different from those of RP or RE with significantly low peak viscosity, breakdown and setback values in the ETR sample. Viscosity of MP prepared with ETR was also significantly low, as compared to that of control (> 900 cP). The total solids and spreadability of MP with ETR was higher than those with RP or RE. Hunter color values varied significantly depending on enzyme treatment levels in ETR samples with enzyme dose-dependent increase in b-value. Average starch digestibility of ETR sample was higher by 10.2% than that of control sample. DPPH radical scavenging activities of ETR samples were greater than those of RE or RP. These results indicated that ETR could be beneficial for preparing easy-drink and diet food with higher starch digestibility and fluidity, especially for gastric tube-fed patients.

This study encouraging the consumption of rice. The Tarakjuk in which red yeast rice was added showed the highest water content 78.31%. The viscosity of RRT20, which had the largest amount of red yeast rice, was the lowest for 4,125.50, and pH was the highest in RRT0 The sugar content of Tarakjuk with red yeast rice was the highest in RRT0 for. lightness (L) was lowest in RRT20 which had the largest amount of red yeast rice for, and its red and yellow lighteners were also the highest for respectively. storage at 4℃, no microorganism found for 0 to 1 day of storage but found in every group. The group showed the smallest of microorganism for 2.9×102 CFU/mL. On the 7 day, microorganism also found 40% added showed the smallest of microorganism for 3.1×104 CFU/mL. The color of the 20% added group, 6.74, was higher than that of the control group, 4.87, but the difference was not significant. The flavor was the in the 30% added group for 5.90, and taste was the in the 20% added group for 6.01 The control group showed the lowest preference for 4.91. The after taste was the in the 30% added group for 5.48. The viscosity of the 40% added group was higher for 5.39 than that of the control group for 5.06, no significant difference. The overall preference was rated highly, and the 20% added group showed the highest preference for 5.57.

This study was conducted to evaluate the effect of various types of functional brown rice milk porridge, which has been popular as a fast yet nutritional food, to promote rice consumption and to examine the best ratio and recipe. Each sample contained 10, 20, 30, and 40% brown rice compared to non-glutinous rice and sweet rice and were applied to mechanical and sensory tests. The moisture content of both non-glutinous rice and sweet rice porridges increased with increasing brown rice content. The viscosity of non-glutinous rice milk porridge decreased as with increasing brown rice content, whereas the viscosity of sweet rice milk porridge increased with increasing brown rice content. The pH was highest for BRT0 at 6.74 and lowest for BGT0, which is sweet rice porridge with brown rice, at 6.27. The sweetness decreased significantly for both sweet rice and non-glutinous rice porridges with the increase in brown rice content. The brightness of weet rice and non-glutinous rice porridges with brown rice increased significantly (p<0.001) with the increase in brown rice content, while the redness and yellowness of the color increased significantly (p<0.001) with increasing in brown rice content. As a result of analyzing the preference in the milk porridge containing brown rice, BRT30, which is non-glutinous rice milk porridge with brown rice, was most preferred at 5.8 in terms of color, while BRT30 was most preferred at 6.2 in terms of fragrance. All samples containing brown rice powder were highly preferred in terms of taste and the overall preference of sweet rice milk porridge was highest for BRT30 (5.8). The overall preference was highest for BGT30 at 6.1 and the preference was generally higher for the experiment groups prepared with sweet rice as opposed to those prepared with non-glutinous rice. Also, the scores for the sensory test were higher when brown rice was added. Therefore, it was concluded that the milk porridge could quickly and easily be prepared with brown rice instead of non-glutinous rice or sweet rice.

팽화미분을 활용한 타락죽의 제품화를 위한 기초자료를 제공하기 위해서 팽화미분 첨가에 따른 타락죽의 pH, 수분, 고형분, 총당, 아밀로스, 점도, 퍼짐성 그리고 색도 변화를 조사하였다. 타락죽의 pH는 갈은 쌀로 제조한 시료가 팽화미분으로 제조한 시료보다 높았다. 그리고 분유를 첨가한 시료도 우유를 첨가한 시료보다 높았다(p<0.05). 수분 함량은 갈은 쌀과 분유를 혼합한 타락죽이 84.56%로 가장 높았고, 팽화미분과 우유를 혼합한 타락죽은 81.04%로 가장 낮았다(p<0.05). 고형분 함량은 수분함량과 반대되는 결과를 보였다(p<0.05). 총당 함량은 조리 시 가열처리한 시료 사이에서 유의적인 차이가 없었고 가열처리하지 않은 시료보다 높았다(p<0.05). 팽화미분으로 제조한 타락죽의 아밀로스 함량이 갈은 쌀로 제조한 타락죽보다 높았다(p<0.05). 점도는 갈은 쌀 타락죽이 팽화미분 타락죽보다 높았으며(p<0.05) 아밀로스 함량과 반비례하는 결과를 보였다. 퍼짐성은 점도와 상반되는 결과를 보였다(p<0.05). L값은 갈은 쌀 타락죽이 팽화미분 타락죽보다 높았다. 적색도는 팽화미분 타락죽이 가장 높았으며(p<0.05), 갈은 쌀과 우유를 혼합한 시료가 가장 낮게 나타나 L값과 반대되는 결과를 보였다. 황색도는 a값과 유사한 경향을 보였다.

Tarakjuk with different amylose content was made up using roasted rice flours that consisted of the highest enzyme-resistant starch (RS), while differential scanning calorimetry (DSC) was also utilized to measure the gelatinization temperature of these roasted rice flours in order to establish cooking temperature of tarakjuk. The following qualities of tarakjuk with different amylose content were studied: color, viscosity, spreadability, starch fractions involving total starch (TS), rapidly digestible starch (RDS), slowly digestible starch (SDS) and RS, in vitro starch digestibility (IVSD) and sensory properties. During experimentation, it was found that as the amylose content of the rice flour decreased, the L value of tarakjuk decreased, whereas a value increased significantly (p〈0.05). Also, while viscosity showed to increase significantly (p〈0.05), on the opposite end, the property of spreadability decreased. TS ranged from 15.95~17.31%, RDS 9.36~10.16%, SDS 5.46~6.91% and RS 0.33~1.07%, on a dry basis. Although the amylose content of rice flours decreased, IVSD increased, however showing no significant difference. When testing the sensory properties of tarakjuk, color and viscosity increased, whereas clumpiness decreased. Ilpum tarakjuk showed the highest score for nutty taste and overall acceptance levels. In fact a high correlation was shown between nutty taste and overall acceptance level (p〈0.01), which leads one to believe that nutty taste is a prime factor that greatly influences overall acceptance. Furthermore, viscosity was positively correlated with both a and b values, however negatively correlated with L value (p〈0.05). Moreover, roasted nutty taste and overall acceptance were positively correlated with a value (p〈0.05), respectively. In conclusion, the above results suggest that tarakjuk could be made by choosing the appropriate rice flour based on the nutritional or sensory purpose.