Quality characteristics such as texture and sensory properties of garaetteok(Korean rice cake)made with organic rice flour treated withcitric acid were investigated. Compared to rice flour without addition of citric acid,rice flour treated with citric acid showed a significantly lower viscosity and viscoelasticity level as the concentration of citric acid increased. Hardness of garaetteokmade with citric acid showed a similar trend in viscoelasticity changes, whereas cohesiveness was not significantly affected by the pretreatment of citric acid.Garaetteok of 0.5% citric acid pretreatment showed the highest scores in hardness, springiness, chewiness and overall acceptability.However,flavor and taste of garaetteokof citric acid pretreatment were lower than those of the control.

본 연구는 식품위생교육을 이수하는 국내 떡류 영업자를 대상으로 설문조사를 통하여 우리나라 떡류 영업의 특성을 파악하고 온라인 및 오프라인 식품위생교육에 대한 인식도의 차이를 비교 분석하고자 하였다. 떡류 영업자 연령대는 50대(40.1%), 학력은 고졸(52.6%), 종사기간은 10년~20년(34.3%)이 가장 높은 것으로 나타났고, 영업 및 영업장 관련 종사인원은 2명(79.5%), 면적은 99.17 m² 이하(92.0%), 점유 형태로 임차 사업장(60.2%), 사업장에 대한월 임차 금액 100만 원 이하(54.8%)를 대부분 지불하고있으며, 영업장 안전사고 발생은 3년간 228건(연평균 2.4%),제조·가공 품목수는 20가지 이하(86.7%)로 분석되었다. 식품위생교육 채널별 인식도에서 영업자는 여성, 연령대가 낮을수록, 학력이 높을수록 온라인 교육을 선호하였고, 온라인 교육 선택 이유로 ‘시간적ㆍ경제적ㆍ편리성’(73.7%)가 나타났으며 온라인 이수자는 위생교육이 영업에 더 도움 된다고 인식하였다. 매출액은 온ㆍ오프라인 이수자 간의 유의적 차이가 없었고 위생적 관리에 대해서는 온라인이수자가 오프라인 이수자보다 7.4% 높게 잘 하고 있다고 답변하였다. 이전의 교육기관의 교육 대비 떡류 영업자만을 위한 교육은 온·오프라인 이수자 모두 60.7% 정도 더 만족하는 것으로 분석되었다.

Bamboo sprout powder was added to rice cake in an effort to improve the quality and functional properties of dough. The contents of crude protein and carbohydrates increased as the amount of bamboo sprout powder increased, whereas moisture contents decreased. According to increasing contents of bamboo sprout powder, total amino acid contents significantly increased. Hunter’s L value decreased as contents of bamboo sprout powder increased, whereas sucrose contents increased. Addition of bamboo sprout powder to rice cake increased dietary fiber contents. Sensory scores of rice cake containing 90 g of bamboo sprout powder were the highest of all rice cakes tested. According to the results, adding bamboo sprout powder could improve the quality and sensory characteristics of rice cake.

This study compared recipes of Korean Traditional steamed dishes, Noodles, Rice cake & Confectionary in Choi’s Recipe (「Choi’s Eumsikbeop」) with those in other literatures written during the mid-Joseon Dynasty. Through this work, it aimed to explore the value of Choi’s Recipe (「Choi’s Eumsikbeop」) in the history of cooking and the meanings of its recipes. Choi’s Recipe (「Choi’s Eumsikbeop」) contains recipes for a total of 20 kinds of food. Specifically, there are seven kinds of Fermented dishes (kimchi (6), and salted fermented food (1)), four kinds of Steamed dishes, seven kinds of Confectionary and Sweet (rice cake (4), jeonggwa (1), and dang (2)), and two kinds of Noodles (dumpling (1), and noodle (1)). Among them, the steamed dishes revealed characteristics of 17th-century food as in other cooking books, and some of them utilized unique ingredients handed down only through head families. Moreover, some recipes showed different cooking methods using similar materials. This suggests the originality of the recipes in this cooking book.

The milling characteristics of rice using different milling methods (dry and wet) were investigated. Generally, average particle sizes of dry-milling flours were bigger than those of wet-milling flours due to low moisture content. Three theoretical models for milling, such as the Rittinger, Kick, and Bond model, were applied to characterize the milling process of rice. The wet-milling method showed higher value milling constants including Bond’s work index. Baeksulgi was used to study the effect of the milling method and particle size on rice flour’s physicochemical property (water content, color value, and texture). Moisture content and hardness of Baeksulgi were smaller as the particle size became smaller. L value of Baeksulgi was greater as the particle size became smaller. The energy requirement for the milling of grains to obtain a suitable size of particles was estimated by the grinding models. The results of our study might provide a systematic way to estimate the energy requirement to obtain a suitable particle size by milling

The aim of this study was to review Byung-Kwa-Ryu recipes in old cookbooks of the head & noble family (Jong-Ga). As for details and classification, we examined the materials and recipes of Byung-Kwa-Ryu. To accomplish this, old cookbooks of the head & noble family (「Soowoonjabbang」,「Eumsikdimibang」,「Onjubub」, and「Jusiksiui」) were reviewed. The introduced Byung-Kwa-Ryu recipes numbered 47 total; four from「Soowoonjabbang」, 18 from「Eumsikdimibang」, nine from「Onjubub」, and 16 from「Jusiksiui」. We classified the foods (Byung-Kwa_Ryu) into two categories, Tteok-Ryu (Korean rice cake) and Kwa-Jung-Ryu (Korean traditional cookie), on the basis of previous studies. These were further classified into 11 categories: Tteok-Ryu (Jjin-tteok, Salmeun-tteok, Chin-tteok, Jijin-tteok), Kwa-Jung-Ryu (Yumilkwa, Yukwa, Jeongkwa, Dasik, Kwapyun, Dang (Yeot), and others. The most common Byung-Kwa-Ryu type was Jjin-tteok in Tteok-Ryu (14). The next most common Byung-Kwa-Ryu types were Yukwa in Kwa-Jung-Ryu (6) and Yumilkwa in Kwa-Jung-Ryu (5).

Rice cake is the most historical food which has been developed from settlement of agriculture and typical traditional food which has manufacture and food historical meaning. Because, the process of rice flour, raw ingredient of rice cake, tells remarkable food processing technology of our nation, and is original form of processed food that we has been taken before agricultural life begun. In this study, contents analysis method is used. Ingredients of rice cakes appeared in ?Gyuhapchongseo?glutinous rice 12 times (42.8%), nonglutinous rice 10 times (35.7%), and the others 6 times (21.4%) used as the main ingredients of rice cake. the rice cake separated into 15 types (53.5%) of steamed rice cake, 2 types (7.1%) of pounded rice cake, 3 types (10.7%) of boiled rice cake, 7 types (25%) of sauteed rice cake, and 1 types (3.5%) of the others. it become data for knowing social and dietary culture of the time. And it is for presenting fundamental material of possibility of modern rice cake.

Sulgidduk is a kind of basic steamed rice cake in Korea. Multifunctional portable grinder was used for making sulgidduk and investigated the characteristic changes of rice powder for deciding the proper particle size of rice powder. Operation times for grinding the water absorbed swelled rice were 10, 20, 30 and 40 seconds. Moisture contents of rice powder and sulgidduk showed an increasing tendency with an increase of operation times for grinding. Springiness showed significant differences according to the operation times. Cohesiveness was decreased severely after 40 seconds grinding. Chewiness showed high after 20 seconds grinding in all groups; however, decreased after 40 seconds grinding and showed similar chewiness of the control group. Fracturability also showed severe increased tendency after 20 seconds grinding and decreased after 30 seconds grinding. Strength and hardness showed significant differences; they were increased until 30 seconds and severely decreased after 40 seconds grinding. L values showed significant differences in all the groups (p≤0.05). The a and b values did not show any differences in all groups. Overall sensory evaluations, such as colors, flavors and texture, were increased with operation times for grinding and showed significant differences among the groups (p<0.05). As a result of this study, 40 seconds grinding times were the best condition for making sulgidduk, using by multifunctional grinder.

본 연구에서는 다수확 품종인 벼 품종들의 이화학적인 특성을 조사하여 가공적성이 우수한 품종을 선정하고, TG를 첨가하여 쌀 스폰지케이크를 제조함으로써 로프 볼륨과 조직감 등 품질향상을 위해 실험을 수행하였다. 아밀로오스 함량은 품종간 18.5~20.2% 범위로 유의적인 차이가 없었다. 물결합력은 품종 중 보람찬이 높아 제빵 제조에 적절하였으며 물결합력과전분손상도는 서로 정의 상관을 나타냈다. 품종들의 호화특성은 트랜스글루타미나제를 첨가하지 않은 쌀가루보다 첨가된쌀가루에서 향상되었다. 쌀 스폰지 케이크의 부피와 견고도는부의 상관관계를 가졌고, 0.2% TG 첨가 시 밀가루와 유사한부피를 나타냈다. 스폰지케이크의 경도는 무첨가 보다 TG 첨가 시 변화가 적어 노화가 억제되었고, 0.2% 첨가 시 물성개선에 적절하였다. 관능검사 결과 보람찬 품종이 외형, 조직, 맛과 전체적인 평가에서 우수하였다.

This study was conducted to investigate the microbiological contamination levels in rice cakes and rice flour due to climate change in three areas classified to their temperature and precipitation. We investigated the contamination levels of total aerobic bacteria, coliforms, Escherichia coli, Bacillus cereus, Staphylococcus aureus, Clostridium perfringens of rice flour and 3 rice cakes such as Garaetteok, Sirutteok and Gyeongdan. Contamination levels of total aerobic bacteria in rice flour were 4.9 log CFU/g. In a total of 70 rice flour, yeasts & molds and coliforms were detected in 42 and 52 samples at the levels of 43 CFU/g and 1.29 log CFU/g, respectively. S. aureus were detected in only 1 rice flour (1.66 log CFU/g) out of 70. In an investigation of contamination levels in rice cakes, the population of total aerobic bacteria were highest in Gyeongdan (5.18 log CFU/g) and coliforms were highest in Gareattock (2.93 log CFU/g). There was no detection of E. coli and B. cereus except for only 1 Gareattock (1.20 log CFU/g). There were no differences of contamination levels among the three areas. If constant monitoring of rice cakes and rice flour is conducted on the basis of this study, it is expected to be able to analyze the change of contamination levels in rice cakes and rice flour due to climate change.

모시잎 떡 제조에 이용되는 원료미 선정을 위해 쌀전분의 이화학적 특성과 저장에 따른 물성변화를 검토하고 관능검사를 실시하여 품종 간 차이를 비교하였다. 품종들의 아밀로스와 단백질 함량은 각각 13.6-17.6%와 5.1-6.9% 범위를 나타내 모든 품종들의 식미가 양호하고 특히 보람찬의 경우 단백질 함량이 낮게 측정되어 식미와 가공에 적합한 품종임을 예상할 수 있었다. 아밀로그람 특성 평가에서 품종 중 보람찬과 다미가 최종점도와 강하점도는 높고 치반점도는 낮아 떡 제조에 유리한 품종이었다. 저장기간에 따른 물성 측정 결과 모든 품종들의 경도, 검성, 씹힘성은 증가하였고 부착성은 감소하여 시간이 지날수록 노화가 촉진되었고, 응집성은 증가되어 모시잎 첨가로 인하여 노화가 다소 지연됨을 알 수 있었다. 또한 품종 중 다미와 보람찬이 다른 품종들에 비해 물성에 있어 유의적인 차이를 나타냈는데 아밀로그람 특성 결과와 상관관계가 있음을 알 수 있었다. 관능적 특성 중 색과 향미는 품종 간 큰 유의적인 차이를 나타내지 않았고 맛은 다미, 보람찬과 호품이 우수하게 평가되어 군집분석 결과 노화도가 낮은 group과 일치하였고, 조직감은 경도, 탄성, 점착성이 낮고 응집성이 높은 다미와 보람찬이 우수하였다. 전체적인 기호도는 다미와 보람찬이 가장 높게 평가되어 맛과 조직이 가장 큰 영향을 미치는 요인이었다. 이상의 결과로부터 모시잎떡 제조에 다미와 보람찬이 가장 우수한 적합품종임을 알 수 있었다.

This study, 255 people, Gyeonggi-Y Elementary School (Grade 2 to Grade 3) and Power Point educational media activities, made a rice cake, and then through surveys conducted by education, training effect of dietary was analyzed.The name of rice cake(99.1%) and rice cake flour with about 82 percent know.Gratitude to farmers, students have been answered by 91.3% after the dietary change was education. Teaching Satisfaction 'Yes' was answered more than 91.0%. Diet, the importance of education and appreciation for farmers was a positive correlation. Satisfaction with teaching and also showed a positive correlation is very high. Also grateful to farmers and satisfaction with teaching showed a positive correlation with satisfaction. Making rice cake with exercise diet showed that the effect of education is very high. Therefore conducted a systematic practice cooking to suit the students' level of food education will be done efficiently.

This article examines the types and cooking methods for tteok (Korean rice cake) according to its sub-ingredients, as recorded in 18 old literatures of the Joseon dynasty (1392~1909). The sub-ingredients used in tteok during the Joseon dynasty were categorized into flowers, fruits, vegetables, Korean typical medicinal plants, and others. In the early, middle, and late eras of the Joseon dynasty, one, six, and 14 kinds of tteok were prepared using flowers as the sub-ingredient and two, seven, and 32 kinds of tteok were prepared using fruits, respectively. Three, seven, and 38 kinds of Tteok were prepared using vegetables as the sub-ingredient, while there were three, five and 15 kinds tteok prepared using Korean medicinal plants, respectively. One, five, and 13 kinds of tteok were prepared using other ingredients such as fish and seogi mushrooms in the early, middle, and late eras of the Joseon dynasty, respectively. The types of sub-ingredients and the resulting types of tteok increased throughout the Joseon dynasty, indicating that flowers and vegetables were preferred the most among tteok sub-ingredients. Tteoks using flower as the sub-ingredient, whajeon, were mostly jijin-tteok. The types of tteok and cooking methods using other sub-ingredients were discussed in terms of the type of sub-ingredients and their treatment to prepare tteok. The sub-ingredients were mixed with flour, which was the main ingredient for preparing tteok, or ground and shredded to prepare gomul for decorating and stuffing tteok, respectively. It seemed that the appearance and taste of tteok varied, thereby resulting in nutrient supplementation as the kinds of sub-ingredients increased throughout the Joseon dynasty. We expect that the recipes and ingredients as well as the cooking methods recorded in these old articles will contribute to those looking for a healthy life and, furthermore, to the globalization of tteok.

백설기 원료인 쌀가루에 당 및 식이섬유의 함량이 높은 것으로 알려진 고구마가루를 5, 15, 25%(w/w, dry-weight basis) 비율로 첨가하여 원료 및 제품에서 나타나는 이화학적 품질과 제품의 관능특성, 및 저장성을 관찰하였다. 쌀가루에 대한 고구마가루 첨가량이 증가할수록 제품의 수분결합력, 팽윤도가 증가하였으며 외관에 있어서 적색도 및 황색도가 증가한 반면 전체적인 외관은 다소 어두워졌다. DSC(Differential Scanning Calorimeter)에 의한 열적특성의 분석결과 고구마가루의 H는 28.1 J/g으로서 19.1 J/g인 쌀가루에 비해 2배 정도로 높아 호화경향이 낮은 것으로 조사되었다. DSC thermogram에 나타난 전분의 노화도 경향은 고구마가루 첨가량이 증가할수록 감소하여 고구마가루 첨가량에 비례한 제품의 노화억제효과가 확인되었다. 제품의 경도, 응집성, 탄력성, 씹힘성 등은 고구마가루 첨가에 따라 감소하였으며 또한 경도증가율이 낮아져 고구마가루의 노화지연 효과가 확인되었다. 백설기 내의 고구마가루 첨가는 상대적으로 낮은 저장온도에서 제품의 경도증가를 억제하는 경향이 있었다. 그러나 제품의 경도변화의 폭은 저장온도 보다 고구마가루 첨가의 영향을 더 많이 받는 것을 알 수 있었다. 미생물적 특성에 있어서 제품을 실온에서 3일간 저장 시 고구마가루 첨가량에 따라 총 미생물수가 미첨가구에 비해 최고 1/10정도까지 낮게 유지되었다. 제품의 외관과 색을 제외한 전반적 기호특성은 고구마가루 첨가에 따라 향상되었으며 특히 15% 첨가구가 가장 좋은 평가를 받았다.

This article examines the types of tteok (Korean rice cake) recorded in 21 old literatures of the Joseon dynasty (1392-1909) according to its main ingredients. Tteok varieties of the Joseon dynasty were categorized into jjin-tteok, chin-tteok, jijin-tteok, salmeun-tteok and guun-tteok and their changes in cooking method were discussed from the early to late eras of the Joseon dynasty. These can be summarized as follows. In the early, middle and late eras of the Joseon dynasty, there were 1, 15 and 84 kinds of tteok using non-glutinous rice as the main ingredient, and 6, 24 and 120 kinds using glutinous rice, respectively. Tteok using wheat flour was not found in the early Joseon dynasty, whereas 6 and 32 kinds were found in the middle and late eras, respectively. There were 1, 4 and 5 kinds of tteoks using buckwheat, and 5, 11 and 19 kinds using other ingredients such as yam, barley, elephant's ear, oat, and arrowroot flour, in the early, middle and late eras, respectively. The frequency of the main ingredient increased in the order of glutinous rice>non-glutinous rice>wheat flour>other ingredient>buckwheat flour during the Joseon dynasty and the ratio of tteoks using non-glutinous and glutinous rice flours was 1:1.5. The number and types of tteok were noted to increase abruptly throughout the Joseon dynasty. This may be associated with the commercial industrial development that prevailed in the late Joseon dynasty. Further study will be conducted on their recipes and ingredients recorded in these old literatures to develop a standardized recipe for the globalization of tteok.

The effects of substituting whey protein isolate (WPI) powder for rice flour during the preparation of paeksulgi (Korean rice cake) were evaluated by objective and subjective tests. Milk whey is drained from milk curd as a by-product of the cheese manufacturing process. Whey protein is known as a good nutritional source and a functional material for many processed foods. WPI contains more than 90% whey protein. The moisture content decreased gradually during storage and the decrease was less in control than WPI powder-substituted groups. The color lightness (L) decreased significantly with increasing WPI powder, wherease the redness (a) and yellowness (b) both increased. Texture analyses revealed that the hardness, chewiness, gumminess, adhesiveness and fracturability of paeksulgitended to increase in proportion to the amount of WPI powder added. Evaluation of the gelatinization of paeksulgi by amylographing revealed that the initial pasting temperature, peak viscosity, hot pasting viscosity and breakdown was lower in samples that contained WPI powder. However, the lowest setback value was observed in the control. The results of the sensory evaluation indicated that paeksulgi prepared with 2% WPI powder had the highest overall acceptability. Taken together, these results suggest that WPI paeksulgi containing 2% WPI powder has the best quality.