벼 품종에 따른 무균포장밥의 식미특성 및 품질 변이

천아름,송진,김기종,김재현,손종록,오예진 한국작물학회 2007 한국작물학회지 Vol.52 No.4

1. 무균포장밥의 종합적 식미에는 외관과 항보다 맛과 조직감의 상관이 더 높은 것으로 나타났다. 2. 벼 품종별로 무균포장밥의 종합적 식미를 군집분석 한 결과 고품벼, 일품벼, 주남벼, 호평벼, 새추청벼, 상미벼, 삼백벼, 평안벼, 화성벼, 대안벼 및 남평벼가 식미가 우수한 것으로 나타났다. 3. 원료쌀 및 무균포장밥의 품질특성이 식미에 미치는 영향을 살펴보기 위해 상관분석을 실시한 결과 백미의 백도, 명도, 수분함량 등과는 정의 상관을 보이고 팽창용적 및 단백질 함량, 무균포장밥의 황색도 등과는 부의 상관을 보임을 알 수 있었다. 4. 저장기간에 따라 무균포장밥의 경도는 증가하고 응집성은 감소하나, 일단 가열을 한 뒤에는 유의한 물성 차이를 보이지 않았다. 5. 벼 품종 간에 무균포장밥 저장기간에 따른 유의한 품질변화는 나타나지 않았다. We carried out this experiment on the purpose to investigate the quality properties of aseptic-packaged cooked rice by cultivars in 2006. Brown rice was milled for white rice to 89.6% weight of it. Based on cluster analysis of acceptance of sensory evaluation, eleven rice cultivars of 29 cultivars had superior palatability. Whiteness(r=0.42, p<5%), lightness(r=0.39, p<5%), Toyo value(r=0.35, p<10%), and moisture content(r=0.33, p<10%) of milled rice were correlated positively with acceptability. Protein content(r=-0.40, p<5%), expansion rate(r=-0.68, p<1%) and water absorption rate(r=-0.42, p<5%) of milled rice, and yellowness(r=-0.45, p<5%) of aseptic-packaged cooked rice were negatively correlated. In sensory evaluation, correlation coefficients of taste and texture with acceptability were higher than those of appearance and flavor. During storage, hardness and cohesiveness of aseptic-packaged cooked rice before reheating were increased and decreased, but those after reheating had no difference based on storage period and cultivar. On the contrary, whiteness of reheated aseptic-packaged cooked rice with no distinct differences before reheating was decreased during storage. There were no significant differences of texture property, color characteristics and moisture contents by cultivar during storage.

미강의 토코페롤 및 토코트리에놀 함량과 항산화 물질의 품종간 비교

천아름,이유영,김대중,윤미라,오세관,최임수,홍하철 韓國作物學會 2013 한국작물학회지 Vol.58 No.4

The rice bran, a by-product of rice milling process, is well known for various functional components, such as tocopherol, tocotrienol, γ-oryzanol, carrying antioxidant activities. This study was conducted to investigate the antioxidant components and antioxidant activities in rice bran of different Korean rice cultivars. The 8 isomers of vitamin E, γ-oryzanol, flavonoids, and polyphenolics in rice bran from 16 Korean premium and high quality rice cultivars were quantified. DPPH and ABTS radical scavenging activities and reducing power of the ethanol extracts of rice bran were measured. ‘Hopum’ showed the highest total vitamin E content, 221.47 μg/g among the cultivars, and ‘Hanseol’ showed the lowest content. The rice bran showed different compositions of α-, β-, γ-, δ- tocopherol and tocotrienol among rice cultivars. The antioxidant contents were also different by cultivar; the γ-oryzanol contents ranged from 1.99 mg/g (Unkwang) to 4.30 mg/g (Chilbo), the polyphenol contents ranged from 427.22 mg gallic acid eq./100 g (Odaebyeo) to 775.80 mg gallic acid eq./100 g (Hopum). ‘Hopum’ also had the highest DPPH and ABTS free radical scavenging activities, 9.82% and 187.5 AEAC mg/100 g, respectively. In vitro, the rice bran extracts from ‘Hopum’ had significantly higher antioxidant activities than that of other cultivars.

국가별 유통 브랜드 쌀의 외관 및 이화학적 품질 특성 변이

천아름,이춘기,최인덕,윤미라,곽지은,김미정,곽강수 한국국제농업개발학회 2018 韓國國際農業開發學會誌 Vol.30 No.1

With the decision to open the rice market in 2014, after 20 years of rigid import control based on Korea’s rice import scheme, the tariff rate became the key to South Korea’s rice market opening. Korea has now imposed a rice import duty of 513 percent on any rice imported in excess of a quota of 408,700 metric tons annually. Therefore, the quality evaluation on local rice brands of those countries is needed to secure the quality competitiveness of Korean rice, also to protect the rice industry in Korea. In this study, the grain qualities of local rice brands from 6 major rice exporting countries which are anticipated to export their rice to Korea were examined. Total 38 local milled rice brands were collected from USA (7), China (16), Australia (4), Thailand (3), Vietnam (5) and India (3), and another 2 milled rice of Minimum Market Access (MMA) imported from USA and China. The average values of amylose by country ranged from 24.4(India)~16.2%(Thailand). The protein content was 6.42% by overall average, and was higher in order of India(7.86), Australia(6.80), Vietnam(6.61), Thailand(6.59), China(6.28), USA(5.82). In Toyo glossiness value, it ranged from 75.7~45.2, and the figures in USA and China were the highest level. The head rice ratio ranged from 95.2~72.4%, and the figures in Thailand, USA and China were distinctively higher. When we analyze the palatability of boiled brand rice by expert panelists, several rice brands from USA and China showed higher scores than those of the other countries in shape, smell, taste, stickiness, texture and overall score. The results will provide basic information on the quality assessment of foreign rice which may be imported into Korea in the near future, also for the quality information to be applied on the development of high-quality Korean rice varieties. Also, continuous monitoring about the foreign rice brand is helpful to improve the quality competitiveness of domestic rice. 1. 주요 쌀 생산국 브랜드 쌀 및 MMA 쌀 40점의 품질을 조사한 결과, 수분함량은 11.6(인도)~14.2%(중국), 단백질 함량은 5.82(미국)~7.86%(중국), 아밀로스 함량은 16.2(태국) ~24.4%(인도), 윤기치는 45.2(인도)~75.7(미국)의 범위를 나타내었다. 2. 국가별 수집된 브랜드 쌀의 형태적 특성을 살펴본 결과, 중국과 베트남의 브랜드 쌀은 주로 통통한 단립종이었고, 미국 브랜드 쌀은 중간 두께의 중립종이었으며, 태국 브랜드 쌀은 얇은 장립종의 형태를 나타내었다. 호주와 인도는 단립, 중립, 장립의 다양한 형태의 쌀을 확인 할 수 있었다. 3. 국가별 브랜드 쌀의 백미 품위를 살펴본 결과 완전미율은 72.4(인도)~95.2(태국)%의 범위였으며, 베트남 브랜드 쌀은 동할미 비율이 높았으며, 인도 브랜드 쌀은 분상질미 비율이높은 특징을 나타내었다. 4. RVA를 이용한 호화특성을 분석 한 결과, 인도의 브랜드 쌀이 최고온도가 낮고 치반점도가 높으며 강하점도가 낮아 취반미의 찰기가 낮을 것으로 예측되었으며, 호화개시온도 또한 유의하게 높은 것을 확인할 수 있었다. 5. 국가별 브랜드 쌀의 식미 관능평가를 실시한 결과, 수집된 브랜드 쌀의 평균 종합기호도는 미국(-0.59), 중국(-0.76), 호주(-1.23), 베트남(-1.43), 태국(-2.09), 인도(-2.49) 순으로 나타났다.

전분 조성이 다양한 벼 품종별 막걸리 품질 특성

천아름,김대중,윤미라,오세관,최임수,Chun, Areum,Kim, Dae-Jung,Yoon, Mi-Ra,Oh, Sea-Kwan,Choi, Im-Soo 한국식품영양학회 2014 韓國食品營養學會誌 Vol.27 No.1

국내 벼 품종 중 아밀로스 함량과 아밀로펙틴 조성이 다양한 품종의 막걸리 특성을 분석하여 막걸리 품질 고급화 및 다양화를 위한 자료를 제공하고자 본 실험을 수행한 결과는 다음과 같았다. '고아미2호', '고아미3호', '고아미4호'는 품종별 전분 특성과 호화 특성 분석 결과, 낮은 아밀로펙틴 단쇄 비율과 높은 아밀로스 함량에 기인하여 점성이 낮게 나타남을 확인할 수 있었고, 높은 호화개시온도로 인해 가열흡수비와 팽창용적이 각각 2.09~2.13, $25.02{\sim}26.78cm^3$로 다른 품종에 비해 유의하게 낮아, 막걸리 발효에 적합한 전분의 호화가 이루어지지 않음을 확인할 수 있어, 막걸리 제조를 위해 호화를 증진시키기 위한 가공 방법 연구가 필요할 것으로 판단되었다. 품종별 막걸리의 품질 특성은 '설갱', '백진주', '일품'의 알코올 함량은 17.3~18.0% 범위로 통계적인 유의차는 없었으나, '고아미2호'와 '고아미3호', '고아미4호'는 10.0~10.5%로 상대적으로 낮은 알코올 함량을 나타내었고, 당도 또한 '설갱', '백진주', '일품'에 비해 절반 가까이 낮았으나, pH와 산도는 품종 간 유의한 차이를 나타내지 않았다. 또한 원료곡에서 높은 난소화성 다당류 함량을 지닌 '고아미4호' 등은 막걸리에서도 역시 난소화성 다당류 함량이 유의하게 높아, 향후 막걸리 제품으로 이용 시 건강 기능성에 기여할 가능성이 높을 것으로 기대되었다. 결과적으로 아밀로펙틴 조성과 난소화성 다당류 함량에서 차이를 보인 '고아미2호', '고아미3호', '고아미4호' 막걸리의 높은 제조수율과 난소화성 다당류 함량 및 낮은 알코올 함량과 당도를 확인하였으며, 지속적인 발효 공정 연구를 통해 국내 기능성 품종을 이용한 고품질 막걸리 개발이 필요할 것으로 판단된다. Makgeolli, known as takju, is a traditional alcoholic beverage which is native in Korea. It is made from various rice and other cereals. This study is carried out to compare the physicochemical characteristics and functional quality of makgeolli from various rice cultivars according to different amylose contents and amylopectin compositions. The 'Goami2', 'Goami3', and 'Goami4' have high amylose contents and lower proportional degrees of polymerization (DP) 6~12 and higher proportions of DP 13~24 in amylopectin of milled rice. Various variations are shown in pasting properties (viscosities) and gelatinization characteristics, and it is supposed to be related to both the amylose contents and the amylopectin compositions of raw rice. The makgeolli is being manufactured by using the 2-step-brewing method. The makgeolli is analyzed for alcohol contents, pH levels, total acids, Hunter color values and organic acid compositions. The makgeolli of 'Goami2', 'Goami3', and 'Goami4' have showed higher makgeolli yields, lower ethanol contents and less sweetness than other cultivars, and they also have high non-digestible carbohydrates contents which are derived from their high non-digestible carbohydrates contents in milled rice. Therefore, we are able to suggest that it is necessary to improve the makgeolli fermentation processes of 'Goami2', 'Goami3', and 'Goami4'.

원료곡 저장에 따른 쌀가루 제조방법별 품질 특성 평가

천아름,곽지은,윤미라,심은영,이춘기 한국작물학회 2017 한국작물학회 학술발표대회 논문집 Vol.2017 No.-

도정 및 품종혼합에 의한 고아미2호의 취반특성

천아름,송진,홍하철,손종록,Chun Areum,Song Jin,Hong Ha-Cheol,Son Jong-Rok 한국작물학회 2005 Korean journal of crop science Vol.50 No.suppl1

난소화성 다당류의 함량이 높은 고아미2호의 취반특성 개선 및 식미 향상을 목적으로 수행한 연구결과는 다음과 같았다. 1. 취반이 어려운 것으로 알려진 고아미2호는 가루로 1차 호화시킨 후에도 미세전분입자는 호화되지 않은 것으로 나타나 일반적인 취반방법으로는 식미개선에 어려움이 있는 것으로 나타났다. 도정에 의해서 색, 물성 및 호화특성의 변화를 살펴 보았으나 명도와 백도 이외에는 도정율에 따른 유의한 특성 변화는 없는 것으로 나타났다. 2. 상온수분흡수특성을 통해 고아미2호 최소 1시간 이상의 수침시간을 필요로 하며 관능평가를 통해 이 경우 식미가 더 양호함을 확인할 수 있었다. 3. 품종별 호화 및 취반특성을 비교해 본 결과 고아미2호의 호화개시온도가 $88^{\circ}C$로 매우 높고 일반 밥솥에서 취반할 경우 수분흡수율과 팽창용적이 적은 것으로 보아 취반 방법에 있어서 고온고압이 요구되는 것으로 나타났다. 4. 다른 품종과의 혼합을 통한 식미 혹은 물성 개선을 위해 아밀로스 함량이 다른 일품벼, 백진주, 화선찰벼를 비교한 결과 호화가 늦고 경도가 낮으며 노화특성이 양호한 백진주, 화선찰벼가 일품벼에 비해 더 적합할 것으로 예상되었고, 관능 평가를 통해 두 품종이 일품벼에 비해 전반적으로 더 양호한 것으로 나타났다. The functional vice (Oryza sativa L.) has been highly regarded recently, in the change of rice maykets in the world. Goami2 (GA), one of the functional rice varieties, was developed from high-quality rice, Ilpumbyeo (IP). From the previous study, GA has been proved its beneficial effect on the improvement of metabolic control and body weight reduction especially in obesity, We could certain that GA was very difficult to be gelatinized due to the micro lump shown in the Scanning electron micrographs (SEM) photos. To improve its cooking quality, we investigated the changes of physicochemical properties, which were differentiated by the conditions of milling and blending. As GA was milled every $2\%$ until eliminating $12\%$, the nitrogen content was decreased linearly. But the decreasing rate of nitrogen content of GA during milling process was relatively lower than that of IP. Thus, we assumed that GA has relatively high nitrogen in inner starch of grain. The degree of milling had no effect on the gelatinization of cooked GA, but affected lightness and whiteness linearly, which were ranged in normal values when the rice was milled more than $10\%$ in weight. So we could concluded that the milling process was not proper to improve cooking quality of GA. And we could suggested that GA was needed to soak into water at least one hour before cooking by it water absorption rate at normal temperature$(21^{\circ}C)$ and sensory evaluation. From the texture analysis, cooked GA had higher hardness than other varieties. Therefore, we blended GA with IP, Baekjinju(BJ) and Hwasunchalbyeo(HS), then subjected to sensory evaluation. All evaluation items including the sensory preference were the highest scores for the rice blended with glutinous rice varieties, BJ and HS.

벼 품종별 무균포장밥 가공특성 및 관능평가 비교

천아름,송진,김기종,최인덕,김덕수,손종록 한국작물학회 2006 한국작물학회 학술발표대회 논문집 Vol.2006 No.-

수입 찐쌀의 품질 특성

천아름,정응기,최윤희,김기종,이점식,Chun, A-Reum,Jeong, Eung-Gi,Choi, Yoon-Hee,Kim, Kee-Jong,Lee, Jeom-Sig 한국작물학회 2006 Korean journal of crop science Vol.51 No.suppl1

The grain quality of imported steamed-rice was investigated to improve the competitiveness of domestic .ice (Oryza sativa L.) in low price market. Eight samples of imported steamed-rice were collected during 2004 and 2005, and they were examined in appearances, physicochemical, pasting, cooking qualities and palatability. In the appearance of grain, there were many cracks, which were easily classified, on the surface of steamed-rice. And they had high protein contents, low moisture contents and very low glossiness. We could certain that there was often decolorization process after boiling according to the wide range of whiteness in steamed-rice samples. Amylograms and thermo-grams of the steamed-rice represented that they were at-ready gelatinized. Thus, we could concluded that the steamed-rice absorbed water with meager endothermic reaction and eluted more soluble solid with many breaks of the grain than milled rice during cooking process. From the sensory preference evaluation, the steamed-rice had the lowest scores among milled rice, long stored rice, and broken rice samples on all evaluation items. 국내에 수입되고 있는 찐쌀과 국내산 일반 쌀의 품질 특성을 비교 분석한 연구결과는 다음과 같았다. 1. 찐쌀은 외관상 금이 많이 나 있어 쉽게 구분할 수 있었으며, 취반 시 쌀알의 형태가 유지되지 않았고, 다양한 백도를 나타내었다. 또한 단백질 함량은 높고 수분함량은 낮았으며 윤기치는 현저히 떨어짐을 알 수 있었다. 2. 호화 및 열분석과 취반특성 분석 결과 찐쌀은 호화개시온도가 높고, 취반 시 일반 백미보다 수분을 1.5배가량 많이 흡수하며, 팽창용적이 크고 용출되는 고형물 양도 2배정도 많으며, 그 과정에서 쌀알 고유의 형태를 잃는 것을 알 수 있었다. 3 식미관능평가를 통해 찐쌀의 식미가 일반 쌀에 비해 매우 떨어질 뿐만 아니라 묵은 쌀이나 싸라기보다도 유의하게 식미가 낮음을 확인 할 수 있었다.

Risk of Malignancy in Thyroid Incidentalomas Identified by Fluorodeoxyglucose-Positron Emission Tomography

천아름,조혜민,이승호,전홍우,박정미,김규진,정찬희,목지오,강성구,김철희,김보연 대한내분비학회 2015 Endocrinology and metabolism Vol.30 No.1

Background: Thyroid incidentalomas detected by 2-deoxy-2-18F-fluoro-D-glucose positron emission tomography/computed tomography (18F-FDG PET/CT) have been reported in 1% to 4% of the population, with a risk of malignancy of 27.8% to 74%. We performed a retrospective review of FDG-avid thyroid incidentalomas in cancer screening subjects and patients with nonthyroid cancer. The risk of malignancy in thyroid incidentaloma and its association with the maximal standardized uptake value (SUVmax) in 18F-FDG PET/CT were evaluated to define the predictor variables in assessing risk of malignancy. Methods: A total of 2,584 subjects underwent 18F-FDG PET/CT for metastatic evaluation or cancer screening from January 2005 to January 2010. Among them, 36 subjects with FDG-avid thyroid incidentalomas underwent further diagnostic evaluation (thyroid ultrasonography-guided fine needle aspiration cytology [FNAC] or surgical resection). We retrospectively reviewed the database of these subjects. Results: Of the 2,584 subjects who underwent 18F-FDG PET/CT (319 for cancer screening and 2,265 for metastatic evaluation), 52 (2.0%) were identified as having FDG-avid thyroid incidentaloma and cytologic diagnosis was obtained by FNAC in 36 subjects. Of the subjects, 15 were proven to have malignant disease: 13 by FNAC and two by surgical resection. The positive predictive value of malignancy in FDG-avid thyroid incidentaloma was 41.7%. Median SUVmax was higher in malignancy than in benign lesions (4.7 [interquartile range (IQR), 3.4 to 6.0] vs. 2.8 [IQR, 2.6 to 4.0], P=0.001). Conclusion: Thyroid incidentalomas found on 18F-FDG PET/CT have a high risk of malignancy, with a positive predictive value of 41.7%. FDG-avid thyroid incidentalomas with higher SUVmax tended to be malignant.

주요 벼 품종의 물리적 특성에 따른 상관분석

천아름,송진,김재철,손종록 한국작물학회 2005 한국작물학회 학술발표대회 논문집 Vol.2005 No.-