• 한국식품영양과학회지
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• 제8권1호
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• pp.21-24
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• 1979

쌀단백질(蛋白質)의 아미노 강화효과와 과잉강화에 의한 쌀단백질(蛋白質)의 아미노산(酸) 불균형 현상(現像)을 살펴보기 위하여 시판(市販) 백미(白米)에 $0.25{\sim}1.0%$ 수준으로 L-lysin HCI를 강화하여 동물(動物) 사육실험(飼育實驗)을 행(行)한 결과(結果) 다음과 같은 결과(結果)를 얻었다. 1. 강화력이 0.25%일 때 체중증가량(增加量) 및 PER이 가장 높았다. 2. $0.5%{\sim}1.0%$ 수준에선 첨가하지 않은 대조군보다 PER이 높았으나 0.25% 보다는 낮았다. 3. 강화수준 1.0%까지는 아미노산(酸) 불균형으로 인한 강화 역효과는 나타나지 않았다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.325-325
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• 2022

In order to developing high-quality rice varieties and processing varieties, systematic and stable evaluation of physicochemical properties is required for breeding lines. In this study, we compared the quality characteristics evaluation results of rice breeding lines for cooked rice, special rice, and whole crop silage rice adapted to central plain region (Suwon) in order to use as basic data for future rice variety development. Brown rice length/width ratio, head rice ratio, protein content, amylose content, alkali digestion value(ADV) and Toyo value were analyzed to evaluate the quality characteristics of yield trial lines cultivated in Suwon for four years (2017-2020). Brown rice length/width ratio, head rice ratio, protein content, ADV and Toyo values showed significant differences by year, but there was no significant difference in amylose content (p<0.05), which showed little environmental variation. The head rice ratio and Toyo value showed an increasing trend, while the protein content showed a decreasing trend. However, the protein content was the highest in 2020, which is thought to be owing to little sunlight hours due to heavy rainfall in 2020. The protein content of whole crop silage rice was 8.1%, which was significantly higher than that of other lines (p<0.05). Toyo value of medium-maturing and early-maturing lines were 67.6 and 73.7%, respectively, and the Toyo value of medium-maturing lines was higher than that of the early-maturing lines (p<0.05). In correlation analysis among the quality characteristics of the rice lines for cooked rice, significant positive correlations were detected between Toyo value and head rice ratio, amylose content, ADV, and a negative correlation was observed between Toyo value and protein content (p<0.05).

• Asian-Australasian Journal of Animal Sciences
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• 제13권4호
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• pp.490-496
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• 2000

In vivo digestibility, nitrogen retention and microbial protein yield from diets of 100% ammonia treated rice straw (ARS) ($D_1$); 65% untreated rice straw (URS)+30% rice bran (RB)+5% SBM ($D_2$) and 85% ARS+15% RB ($D_3$) were determined using three Japanese Corriedale wethers in a $3{\times}3$ Latin Square Design. Results showed that DM consumption and organic matter digestibility were highest in $D_3$; but did not promote high protein digestibility, which RB+SBM had effected in URS based-diet. Dry matter intake and OM digestibility were the same for $D_1$ and $D_3$. Solubility of fiber bonds was increased by ammoniation, resulting in higher NDF digestibility. Nitrogen retention and microbial protein yield of rice bran supplemented groups was higher than ARS, but supplementation did not significantly increase efficiency of microbial protein synthesis from ARS which did occur when RB+SBM was added to untreated straw. The quality of ammoniated rice straw could be improved through RB supplementation because of its positive effects on DM digestibility, nitrogen retention and microbial protein yield. However, the addition of RB+SBM to URS resulted to more efficient N utilization.

• 한국작물학회지
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• 제50권4호
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• pp.238-246
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• 2005

Rice yield and protein content have been shown to be highly variable across paddy fields. In order to characterize this spatial variability of rice within a field, two-year experiments were conducted in 2002 and 2003 in a large-scale rice field of $6,600m^2$ In year 2004, an experiment was conducted to know if variable rate treatment (VRT) of N fertilizer, that was prescribed for site-specific management at panicle initiation stage, could reduce spatial variation in yield and protein content of rice while increasing yield compared to conventional uniform N topdressing (UN, 33kg N/ha at PIS) method. VRT nitrogen prescription for each grid was calculated based on the nitrogen (N) uptake (from panicle initiation to harvest) required for target rice protein content of $6.8\%$, natural soil N supply, and recovery of top-dressed N fertilizer. The required N uptake for target rice protein content was calculated from the equations to predict rice yield and protein content from plant growth parameters at panicle initiation stage (PIS) and N uptake from PIS to harvest. This model· equations were developed from the data obtained from the previous two-year experiments. The plant growth parameters for the calculation of the required N were predicted non-destructively by canopy reflectance measurement. Soil N supply for each grid was obtained from the experiment of year 2003, and N recovery was assumed to be $60\%$ according to the previous reports. The prescribed VRT N ranged from 0 to 110kg N/ha with an average of 57kg/ha that was higher than 33 kg/ha of UN. The results showed that VRT application successfully worked not only to reduce spatial variability of rice yield and protein content but also to increase rough rice yield by 960kg/ha. The coefficient of variation (CV) for rice yield and protein content was reduced significantly to $8.1\%$ and $7.1\%$ in VRT from $14.6\%$ and $13.0\%$ in UN, respectively. And also the average protein content of milled rice in VRT showed very similar value of target protein content of $6.8\%$. In conclusion the procedure used in this paper was believed to be reliable and promising method for reducing within-field spatial variability of rice yield and protein content. However, inexpensive, reliable, and fast estimation methods of natural N supply and plant growth and nutrition status should be prepared before this method could be practically used for site-specific crop management in large-scale rice field.

• 한국식품저장유통학회지
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• 제10권3호
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• pp.411-416
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• 2003

쌀에 존재하며 토양미생물인 Pseudomonas putida 21025를 미강에 배양하여 생성되는 bacteriocin을 미강 필름에 첨가하여 미강필름의 저상성향상을 조사하였다. Pseudomonas putida 21025를 접종한 미강 액체배지는 초기배지 pH 6.48로 자연그대로의 미강 액체배지를 이용하여 항온 배양기에 3$0^{\circ}C$, 150 rpm으로 33시간 배양하여 bacteriocin을 생성하였다. bacteriocin 첨가 후, 필름 가공시에는 bacteriocin의 생산과 안정성을 고려하여 pH 9.4로 조절한 후 한 시간 이내 교반, 8$0^{\circ}C$로 가열 후 2분간 유지의 총시간을 20분 이내로 하여 미강 단백질 필름을 제조하였다. 이러한 방법으로 제조한 미강 단백질 필름의 아미노태 질소함량을 조사한 결과 20% bacteriocin을 첨가한 미강 단백질 필름이 첨가하지 않은 단백질 필름 보다 아미노태 질소함량이 낮은 것으로 나타났다. 따라서 bacteriocin이 미강 단백질 필름 코팅재의 저장기간 향상에 도움을 줄 것으로 보인다.

• 한국식품조리과학회지
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• 제24권3호
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• pp.273-281
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• 2008

To determine the nutritional quality and physical properties of ginseng-chicken meat porridge, 10 kinds of ginsengchicken meat porridge samples containing waxy and/or non-waxy rice were analyzed for in vitro protein digestibility and their degree of starch hydrolysis. Viscosity and spreadness were determined for the gelatinized pastes of the porridge samples. Microphotographs of the starch granules and pastes were studied to confirm structural changes in the rice starch during cooking. The starch paste from non-waxy rice porridge had higher viscosity than the starch paste from the waxy rice porridge; however, in the case of the ginseng-chicken meat porridge, the difference in viscosity was negligible. Microphotograph comparisions between the waxy rice porridge and non-waxy rice porridge indicated apparent differences in the shapes of their starch granules and gels. The granule surface of the non-waxy rice was very rough while that of the waxy rice was very smooth; this difference would lead to organoleptical discrepancy. The added ginseng increased the protein digestibility of the chicken meat; however, the protein digestibility of the ginseng-chicken meat porridge was lower than that of the chicken meat or rice porridge due to inhibited protein digestion by the gelatinized starch. Finally, the rice porridge had increased starch hydrolysis with additions of chicken meat and vegetables.

• 한국가정과학회지
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• 제7권1호
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• pp.43-50
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• 2004

The purpose of this study is to reach silk protein added in differing amounts to Jeolpyon, Korean traditional rice cake, using rice powder as its primary material, estimation of the micro organism quality, physicochemical property, sensory evaluation and the property of storage period (20${pm} 5 ^{\circ}C$). In the physicochemical property, the content of proximate composition of rice powder was measured as 38.11% of moisture, 56.62% of total sugar, 5.11% of crude protein, 0.52% of crude lipid, 0.25% of ash. And the raw material of silk protein was measured as 6.61% of moisture, 91.22% of crude protein, 6.41% of crude lipid and 0.75% of ash. The pH of raw material for rice powder and silk protein Jeolpyon showed mild acidity as 6.41 and 6.23, respectively. In rice powder and silk protein, total free sugar contents was 0.89% and 0.02%, and total amino acids contents was 4.28% and 52.21 %, respectively. For sensory evaluation. color, taste, softness and adhesiveness were significantly acceptable in control and adding 1 % silk protein. Control and samples added 1$\sim$3% silk protein had high sensory score color in overall acceptance. In conclusion. Jeolpyon can be manufactured with nutritious Jeolpyon by adding silk protein.

• 한국작물학회지
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• 제35권5호
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• pp.379-386
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• 1990

우리나라 수도장려품종 1988년 및 '89년산 미와 중ㆍ남부평야지대 6개소(수원, 남양, 이천, 이리, 계화, 밀양)에서 생산된 7개 품종(자포니카 5, 통일형 2)과 중북부 및 남부중산간지와 고랭지 4개소(철원, 진부, 화서, 운봉)에서 생산된 6품종에 대하여 쌀 단백질 함량의 품종 및 환경변이를 분석ㆍ조사하고 단백질 함량에 차이를 보이는 화성벼, 농백 및 용주벼의 세 품종에 대한 아미노산조성을 조사하였던 시험결과를 요약하면 다음과 같다. 1. 우리나라 벼 장려품종의 백미 단백질 함량은 '88년산미는 평균 7.93%에서 5.5-10.2%의 변이, '89년산미는 평균 9.17%에서 6.3-12.0%의 변이로 현저한 년차간 변이를 나타내었고 자포니카 품종군의 평균 단백질 함량 8.22%에 비해 통일형 품종군이 9.3%로 약 1%정도 높았다. 백미 단백질 함량이 높았던 품종은 자포니카에서는 농백, 도봉벼, 치악벼 등이었고, 통일형 품종군에서는 용문벼, 용주벼, 칠성벼 등이었다. 2. 자포니카 저단백 품종인 화성벼는 자로니카 및 통일벼 고단백 품종인 농백 및 용주벼에 비해 필수아미노산 함량의 절대함량은 낮았으나 질소 16.8g당(단백질 100g에 해당) 필수아미노산 함량은 31.7%로 다른 두 고단백 품종과 비슷하였으며 아미노산중에서 화성벼는 arginine, 농백은 alanine과 lysine, 용주벼는 leucine이 가장 높았다. 아미노산중에서 세 품종 모두 글루타민산 함량이 가장 높았고 필수아미노산중에는 leucine이 가장 높았으며 methionine이 가장 낮았다. 3. 쌀 단백질 함량은 한생종일수록 약간 높은 경향을 보였고 백미투명도가 떨어지고 Mg함량이 높을수록 유의하게 높았으며, K/Mg율, 알칼리붕괴도 및 아밀로즈 함량이 낮을수록 높은 경향을 보였는데 이러한 경향은 자포니카 품종군에서 더욱 두드러졌다. 4. 쌀 단백질 함량은 중부평야지산미가 평균 6.74%로 남부평야지산미의 평균 7.54%에 비해 약 1%정도 낮았고 단백질 함량의 품종간 변이와 산지간 변이의 전분산에 대한 기여율이 각각 55.8%와 28.1%로 품종간 변이가 산지간 변이보다 두배정도 컸다. 5. 중북부 중산간지 및 고랭지산미의 쌀 단백질함량은 평균 5.95%로 남부 중산간지 및 고랭지산미의 6.8%보다 약 0.8% 정도 낮았고 단백질 함량의 품종간 변이와 산지간 변이의 전분산에 대한 기여율은 각각 16.7%와 56.4%로 산지간 변이가 품종간 변이보다 약 4배 가까이 컸다.

• 한국식품영양학회지
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• 제3권1호
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• pp.35-38
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• 1990

For the purpose of the production of single cell protein from rice bran oil, yeast was isolating from soil. It was belonging to Candida albicans Species. These experiments were conducted to find out the property on yeast cell from rice bran oil Molecular weight for the main protein on yeast cell protein from rice bran oil separated by 1% SDS polyacrylamide gel electrophorosis was 22, 000.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2005년도 국제학술회의
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• pp.57-74
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• 2005

Rice yield and protein content have been shown to be highly variable across paddy fields. In order to characterize this spatial variability of rice within a field, the two-year experiments were conducted in 2002 and 2003 in a large-scale rice field of $6,600m^2$ In year 2004, an experiment was conducted to know if prescribed N for site-specific fertilizer management at panicle initiation stage (VRT) could reduce spatial variation in yield and protein content of rice while increasing yield compared to conventional uniform N topdressing (UN, ,33 kg N/ha at PIS) method. The trial field was subdivided into two parts and each part was subjected to UN and VRT treatment. Each part was schematically divided in $10\times10m$ grids for growth and yield measurement or VRT treatment. VRT nitrogen prescription for each grid was calculated based on the nitrogen (N) uptake (from panicle initiation to harvest) required for target rice protein content of $6.8\%$, natural soil N supply, and recovery of top-dressed N fertilizer. The required N uptake for target rice protein content was calculated from the equations to predict rice yield and protein content from plant growth parameters at panicle initiation stage (PIS) and N uptake from PIS to harvest. This model equations were developed from the data obtained from the previous two-year experiments. The plant growth parameters for this calculation were predicted non-destructively by canopy reflectance measurement. Soil N supply for each grid was obtained from the experiment of year 2003, and N recovery was assumed to be $60\%$ according to the previous reports. The prescribed VRT N ranged from 0 to 110kg N/ha with average of 57kg/ha that was higher than 33kg/ha of UN. The results showed that VRT application successfully worked not only to reduce spatial variability of rice yield and protein content but also to increase rough rice yield by 960kg/ha. The coefficient of variation (CV) for rice yield and protein content was reduced significantly to $8.1\%\;and\;7.1\%$ in VRT from $14.6\%\;and\;13.0\%$ in UN, respectively. And also the average protein content of milled rice in VRT showed very similar value of target protein content of $6.8\%$. Although N use efficiency of VRT compared to UN was not quantified due to lack of no N control treatment, the procedure used in this paper for VRT estimation was believed to be reliable and promising method for managing within-field spatial variability of yield and protein content. The method should be received further study before it could be practically used for site-specific crop management in large-scale rice field.