• Journal of Nutrition and Health
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• 제15권1호
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• pp.39-46
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• 1982

Nitrate accumulated in vegetables can, via $NO_2$ during storage and after their ingestion, cause the formation of methemoglobin and many of which are carcinogenic in human body. Especially such vegetables with the highest consumption in Korea as chinese cabbage and raddish frequently showed that high contents of nitrate and nitrite could accumulate. Therefore, pH and the content of nitrate and nitrite of Korean pickles made of upper vegetables, viz, Baiechu Kimchi, Yulmookimchi and Kakdooki were estimated during storage at the conditions of $5^{\circ}C$ and $25^{\circ}C Storage at $25^{\circ}C$ generally led to the more rapidly than that at $5^{\circ}C$. But changes of nitrite level showed very low variation in all tested Kimchi.

• 한국콘텐츠학회논문지
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• 제8권12호
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• pp.291-300
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• 2008

남녀 대학생을 대상으로 성별 및 전공에 따라 식품의 영양성분표시에 대한 인지도를 조사하였다. 가공식품의 구매빈도는 주 3-5회 이상 구매하였으며 남학생은 라면, 우유 및 유가공품의 섭취빈도가 높고 여학생은 과자류, 탄산음료 및 당류의 섭취빈도가 높았다. 식품전공은 주스와 탄산음료, 우유 및 유제품의 섭취가 높고 비식품전공은 라면과 과자류, 당류의 섭취가 높았다. 가공식품 구매 시 중요하게 여기는 요인은 성별 및 전공에 관계없이 모두"맛"이었으며 영양표시에 대한 인지도와 확인율이 높은 쪽은 여학생과 식품전공학생이었다. 남학생은 건강을 위하여 영양표시를 확인하고 여학생은 영양소 함량 확인을 위해 영양표시를 확인하였다. 또한 식품전공은 영양소 함량 확인을 위해 영양표시를 확인하였으며 식품비전공은 영양표시가 복잡해서 영양표시를 확인하지 않았다. 영양성분에 대한 지식은 여학생과 식품전공이 높았으며 전체적으로 식품군, 영양소의 기능 및 비타민에 대한 지식점수는 낮았다. 본 연구 결과, 습관적으로 가공식품을 구매하는 태도에서 벗어나 영양표시를 확인하고 구입하여 영양에 대한 관심을 식생활에 응용하고 영양지식을 함양 할 수 있도록 대학생을 위한 영양교육이 요구된다.

• 한국식품영양학회지
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• 제28권5호
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• pp.866-870
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• 2015

In this study, coffee waste was extracted with different solvents such as ethyl acetate, methylene chloride and methanol to investigate the total polyphenol contents, electron donating ability and the inhibitory effect on glutathione S-transferase. The total polyphenol contents were $3,060.61{\pm}357.12{\mu}g\;GAE/mL$ in ethyl acetate, $909.09{\pm}35.71{\mu}g\;GAE/mL$ in methylene chloride, and $1,602.27{\pm}30.36{\mu}g\;GAE/mL$ in methanol. The total polyphenol contents showed a significant difference (p<0.05) between the solvents. The electron donating ability was $80.20{\pm}1.45%$ for ethyl acetate, $81.94{\pm}0.45%$ for methylene chloride, and $85.14{\pm}1.53%$ for methanol. The electron donating abilities were significantly different (p<0.05) between the solvents. The inhibitory effect of the various extracts on glutathione S-transferase (% inhibition) was $92.12{\pm}0.56%$, $88.48{\pm}0245%$ with methylene chloride extract, and $90.85{\pm}0.14%$ with methanol extract. These too were significant different (p<0.05) between the solvents. The two portions of coffee waste extracts obtained from ethyl acetate and methanol showed meaningful results on the total polyphenol contents, and the inhibition effects on glutathione S-transferase. Therefore, they can be utilized to develop health care foods and can be applied as antioxidants for cosmeceuticals.

• 한국식품영양학회지
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• 제23권4호
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• pp.511-515
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• 2010

It was conducted to assess GABA(${\gamma}$-aminobutyric acid) producing capacity and vitamin contents of germinated brown rice soaked in different soaking solutions. For germination, samples were soaked in 5% glutamic acid solution and 5% lactic acid solution as test group to investigate GABA producing capacity, and samples soaked in the solution without glutamic acid and lactic acid were set as control groups(rice and non-germinated brown rice). The GABA contents of the samples were $44.80\;{\mu}g/g$ for rice, $59.90\;{\mu}g/g$ for non-germinated brown rice, $146.70\;{\mu}g/g$ for germinated brown rice, $203.20\;{\mu}g/g$ for germinated brown rice soaked in glutamic acid solution and $222.5\;{\mu}g/g$ for germinated brown rice soaked in lactic acid solution, resulting in a significant difference(p<0.05). GABA producing capacity was enhanced by the addition of glutamic acid and lactic acid in the soaking solution for brown rice germination. The GABA contents of the germinated brown rice soaked in lactic acid solution greatly increased, along with increases in niacin and vitamin E contents without losing vitamin $B_1$. In conclusion, the addition of lactic acid in soaking solution is most suitable for germination of brown rice.

• 한국식품영양학회지
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• 제30권3호
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• pp.560-567
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• 2017

In this study, we investigated the quality characteristics and optimum conditions of porridge containing rice incubated with Phellinus linteus mycelium (PLMR). Composition measurements of PLMR were moisture 13.05%, ash 0.88%, carbohydrate 78.65%, crude protein 6.29%, and crude lipid 1.13%, also glutinous rice composition was moisture 13.99%, ash 0.32%, carbohydrate 77.18%, crude protein 7.85%, and crude lipid 0.66%. The water absorption rate of PLMR increased with increasing soaking time during 6 hours. However, the water absorption rate of glutinous rice increased until 30 minutes of soaking time. The pH of porridge was decreased as PLMR contents increased. The viscosity of porridge was increased as PLMR contents increased, and it was the lowest for the control at 914.77 cP. However, spreadability of porridge was decreased as PLMR contents increased. In terms of color, lightness was the highest for the 50% level, redness was the highest for the 75% level, and yellowness was the highest for the 25% level. In terms of textural characteristics, hardness and fracturability were increased as PLMR contents increased, whereas springiness, cohesiveness and resilience showed reverse results. In terms of consumer acceptance, flavor, appearance, viscosity, delicate taste, and overall acceptability were not significantly different between samples. Hot taste was decreased as PLMR contents increased, whereas grittiness showed reverse results. In conclusion, the results indicate that adding 25~50% PLMR to porridge is optimal for a recipe.

• Nutritional Sciences
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• 제9권4호
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• pp.323-329
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• 2006

To more accurately estimate vitamin A and vitamin E intake of Koreans, food composition databases of the tocopherol and carotenoid contents of Korean foods are needed. In this study, the tocopherol $(\alpha-,\;\gamma-,\;and\;\delta-)$ and carotenoid ($\alpha-carotene,\;\beta-carotene,\;\beta-ctyptoxanthin$, lutein, and zeaxanthin) contents of 12 Korean cooked combination foods commonly consumed by children in Kwangju, Republic of Korea, were determined using reversed-phase HPLC. All samples were obtained from 3 different households in Kwangju during summer, 2005. All cooked foods in this study had detectable quantities of $\alpha-tocopherol,\;\gamma-tocopherol$ except for shoegogimugook, and $\delta-tocopherol$ except for myulchibokkeum Doejigogibokkeum had the highest $\alpha-tocopherol$ content (0.64 mg/l00 g edible portion), and $\gamma-tocopherol\;and\;\delta-tocopherol$ contents of gimbab were the highest among the foods (1.01 and 0.26 mg/l00 g edible portion). $\beta-carotene$ was found in all food samples. Gimbab had the highest contents of $\alpha-carotene,\;\beta-carotene$, and lutein among Korean cooked combination foods (158.3, 266.6, and $375.4{\mu}g/100g$ edible portion). Miyukgook contained only $\beta-carotene$ ($2.5{\mu}g/100g$ edible portion). Considerable sample-to-sample variability in tocopherol and carotenoid compositions were observed in several Korean cooked combination foods included in this study. Some of these carotenoids $(\alpha-carotene,\;\beta-carotene,\;and\;\beta-cryptoxanthin)$ are vitamin A precursors. The findings of this study may be valuable for use in Korean databases as well as nutrient consumption research for vitamin A and vitamin E.

• 한국식생활문화학회지
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• 제25권4호
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• pp.400-409
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• 2010

This study investigated the food and dietary educational content in primary, middle and high school textbooks in order to provide fundamental data for the development of educational programs on Korean traditional food culture. The research objects consisted of 51 kinds of textbooks (15 kinds of primary school textbooks, 29 kinds of middle school home economics textbooks and 7 kinds of high school home economics textbooks), and the contents related to food and dietary education were counted and analyzed. The content analysis was performed using two categories: application method and subject matter. Application method included texts, cases, visual aids (pictures, photos, illustrations, chart, etc.) and activities, whereas subject matter consisted of seven types (well balanced nutrition and health, understanding of food and nutrition, cooking principles, cooking lessons, traditional foods and culture, others). The results of the application method in primary school textbooks show that visual aids were the most common in all six grades. For the subject matter, 'understanding of food and nutrition' was most abundant in primary school textbooks while 'well balanced nutrition and health' accounted for a large part of the contents in middle school textbooks. However, the contents regarding traditional foods and culture were insufficient in primary and middle school textbooks. These results suggest that educational contents on traditional foods and culture should be added to primary and middle school textbooks and covered in various subjects. Furthermore, high school 'home economics' contents need to emphasize comprehensive food and dietary education and adjust to 'science & technology for life'.

• 한국식품영양과학회지
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• 제44권7호
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• pp.1028-1034
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• 2015

닭고기를 가슴, 넓적다리, 다리의 3부위 살코기와 껍질을 포함한 날개 가식부를 취하여 일반성분과 콜레스테롤 함량을 분석하였으며, 가슴과 넓적다리는 지질, 아미노산 및 무기질 조성도 분석하여 쇠고기 및 돼지고기의 sirloin 부위와 비교하였다. 지방 함량은 가슴살이 1.2%에 불과하였고 넓적다리는 2.8%로 비교적 낮았으나 날개의 경우 껍질을 포함하였기 때문에 14.9%의 함량을 보였다. 단백질은 가슴이 22.9%로 가장 높았으며 넓적다리가 19.7%, 날개가 17.6%로 나타났다. 콜레스테롤은 껍질이 포함된 날개 부위에서 99.0 mg% 로 가장 높게 나타났으며 넓적다리는 80.8 mg%로 나타났으나 가슴살에서는 56.7 mg%로 날개의 절반 수준에 해당하였다. 포화지방산의 함량은 닭고기가 31.6~32.9%로 쇠고기(40.8%)나 돼지고기(42.7%)에 비해 적었고, 불포화지방산은 67.1~68.4%로 돼지고기(57.3%)나 쇠고기(59.2%)에 비해서 가장 높은 것으로 나타났다. 단일불포화지방산은 50.1~51.8%로 쇠고기(55.3%)보다는 낮았으나 돼지고기(46.3%)보다는 높은 것으로 나타났다. 다중불포화지방산은 16.6~17.0%로 쇠고기의 3.9%, 돼지고기의 10.8%에 비해 가장 높은 것으로 나타났다. 필수지방산의 함량은 16.6~16.9%로 돼지고기에 비해 1.6배, 쇠고기에 비해서는 5배가량 높은 것으로 나타났다. 닭고기에서 가장 많은 아미노산은 글루탐산, 아스파르트산, 리신, 류신의 순서였다. 10종의 필수아미노산은 10,454~11,860 mg%였고, 총아미노산 중 필수아미노산의 함량은 42~44%로 돼지고기 및 쇠고기와 유사하였다. 무기질은 쇠고기, 돼지고기와 유사한 조성을 가지고 있었으며 단지 넓적다리 부위는 적색육에 가깝고 가슴 부위는 백색육이기 때문에 성분상의 차이가 다소 확인되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제30권4호
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• pp.554-561
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• 2017

Objective: This experiment was conducted as a $3{\times}2{\times}2$ factorial design to examine the effects of particle size (mean particle size of 331, 640, or $862{\mu}m$), evaluation method (direct vs indirect method) and adaptation duration (7 or 26 days) on the energy content and the apparent total tract digestibility (ATTD) of various chemical components in wheat when fed to finishing pigs. Methods: Forty-two barrows ($Duroc{\times}Landrace{\times}Yorkshire$) with an initial body weight of $63.0{\pm}0.8kg$ were individually placed in metabolic cages and randomly allotted to 1 of 7 diets with 6 pigs fed each diet. For the indirect method, the pigs were fed either a corn-soybean meal based basal diet or diets in which 38.94% of the basal diet was substituted by wheat of the different particle sizes. In the direct method, the diets contained 97.34% wheat with the different particle sizes. For both the direct and indirect methods, the pigs were adapted to their diets for either 7 or 26 days. Results: A reduction in particle size linearly increased the digestible energy (DE) and metabolizable energy (ME) contents as well as the ATTD of gross energy, crude protein, organic matter, ether extract (EE) and acid detergent fiber (ADF) (p<0.05), and had a trend to increase the ATTD of dry matter of wheat (p = 0.084). The DE, ME contents, and ATTD of gross energy, crude protein, dry matter and organic matter were higher (p<0.05) when determined by the direct method, but the ATTD of ADF, EE, and neutral detergent fiber were higher when determined by the indirect method (p<0.05). Prolongation of the adaption duration decreased the ATTD of neutral detergent fiber (p<0.05) and had a trend to increase the ATTD of EE (p = 0.061). There were no interactions between particle size and the duration of the adaptation duration. The ATTD of EE in wheat was influenced by a trend of interaction between method and adaptation duration (p = 0.074). The ATTD of ADF and EE in wheat was influenced by an interaction between evaluation method and wheat particle size such that there were linear equations (p<0.01) about ATTD of ADF and EE when determined by the direct method but quadratic equations (p = 0.073 and p = 0.088, respectively) about ATTD of ADF and EE when determined by the indirect method. Conclusion: Decreasing particle size can improve the DE and ME contents of wheat; both of the direct and indirect methods of evaluation are suitable for evaluating the DE and ME contents of wheat with different particle sizes; and an adaptation duration of 7 d is sufficient to evaluate DE and ME contents of wheat in finishing pigs.

• 한국식품영양과학회지
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• 제45권1호
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• pp.117-125
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• 2016

아질산염과 dimethylamine(DMA)은 발암물질인 N-nitrosodimethylamines(NDMA)의 직접적인 전구물질이다. 본 연구에서는 아질산염과 질산염 함량이 다른 배추가 김치 저장 중에 NDMA, 아질산염, 질산염 그리고 DMA 함량 변화에 미치는 영향을 알아보았다. 배추 1(HNC), 배추 2(MNC) 그리고 배추 3(LNC)의 아질산염 농도는 각각 $47.54{\pm}1.07$, $10.12{\pm}0.31$ 그리고 $6.10{\pm}0.09mg/kg$이었다. 김치는 세 그룹으로 나누었다. 즉 HNC를 사용하여 제조한 HNK, MNC를 사용하여 제조한 MNK 그리고 LNC를 사용하여 제조한 LNK이다. HNK는 저장 10일과 20일째 아질산염과 질산염 수준이 MNK와 LNK의 그것들보다 더 높았다. 모든 김치에서 DMA와 NDMA 함량은 저장기간 동안 감소하였다. HNK는 저장 20일까지 LNK보다 높은 NDMA 함량을 가지고 있었다. 이들 결과들은 배추의 아질산염과 질산염의 함량이 김치 내 NDMA 형성에 현저한 영향력을 가지고 있다는 것을 제안하였다.