• 한국가금학회:학술대회논문집
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• 한국가금학회 2004년도 제21차 정기총회 및 학술발표회
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• pp.69-79
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• 2004

본 연구에서는 사료 중 비타민 C(200 mg/kg)와 비타민 E(250 mg/kg)의 첨가가 heat stress하 육용종계의 난각 품질에 미치는 영향을 조사하였다. 83주령의 강제환우된 Ross 육용종계 160수를 공시하여 4처리 4반복 그리고 반복당 10수를 무작위로 개별 케이지에 수용하였다. 4처리구 중 대조구는 비타민 C와 E를 추가로 첨가하지 않았으며 시험구는 비타민 C 처리구, 비타민 E 처리구, 그리고 비타민 C/E 동시 처리구로 하였다. 실온 25 $^{\circ}C$에서 10일간의 적응기간 후에 32 $^{\circ}C$에서 3주간 실험하였다. 실험기간 중 산란율은 급속히 떨어졌으나 처리구간에 유의한 차이가 없었으나 난중, 비중, 난각두께, SWUSA, pucture force와 난각 파괴강도에서는 비타민 C/E 처리구가 대조구에 비해 유의하게 높았다(P<0.05). 비타민 C 처리구는 경골 파괴강도에서 37.16 kg으로 대조구 및 비타민 E 처리구에 비해 통계적으로 유의하게 높았다(P<0.05).한편, 혈중 corticosterone 수준(5.97 ng/ml)은 대조구가 다른 시험구들보다 유의하게 높았다(P<0.05). Heat stress는 백혈구 중 heterophil의 비율을 높이고 lymphocyte의 비율은 낮추어 H/L ratio를 변화시켰다. 시험구의 H/L ratio는 대조구보다 낮았으나 통계적으로 유의한 차이를 나타내지 않았다. 결론적으로 사료 중 비타민 C(200 mg/kg)와 비타민 E(250 mg/kg)의 첨가는 육용종계에서 heat stress에 의한 영향을 경감하여 난각품질 및 경골강도의 약화를 방지한다고 할 수 있겠다.

• 환경위생공학
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• 제20권2호
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• pp.33-38
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• 2005

Chitosan is a dietary fiber because of a linear polysaccharide composed of $\beta-(1{\rightarrow}4)$-linked 2-amino-2-deoxy-D-glucopyranose. In this study, control release system of vitamin C has been estimated in chitosan molecular network as a vitamin C carrier of controlled release. The amount of released vitamin C were decreased in higher amount of chitosan concentration. Especially, vitamin C were slowly released from chitosan solution in dialysis membrane when compared with vitamin C solution alone in dialysis membrane. These result assumed that chitosan driving force is dependent on chitosan molecular weight and cationic property of amino group with anionic property of vitamin C.

• Asian-Australasian Journal of Animal Sciences
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• 제25권1호
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• pp.98-103
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• 2012

This study was conducted to re-evaluate the dietary vitamin C requirement in juvenile eel, Anguilla japonica by using L-ascorbyl-2-monophosphate (AMP) as the vitamin C source. Five semi-purified experimental diets were formulated to contain 0 ($AMP_0$), 30 ($AMP_{24}$), 60 ($AMP_{52}$), 120 ($AMP_{108}$) and 1,200 ($AMP_{1137}$) mg AMP $kg^{-1}$ diet on a dry matter basis. Casein and defatted fish meal were used as the main protein sources in the semi-purified experimental diets. After a 4-week conditioning period, fish initially averaging $15{\pm}0.3$ g (mean${\pm}$SD) were randomly distributed to each aquarium as triplicate groups of 20 fish each. One of five experimental diets was fed on a DM basis to fish in three randomly selected aquaria, at a rate of 3% of total body weight, twice a day. At the end of the feeding trial, weight gain (WG) and specific growth rate (SGR) for fish fed $AMP_{52}$ and $AMP_{108}$ were significantly higher than those recorded for fish fed the control diet (p<0.05). Similarly, feed efficiency (FE) and protein efficiency ratio (PER) for fish fed $AMP_{52}$ were significantly higher than those for fish fed the control diet (p<0.05). Broken-line regression analysis on the basis of WG, SGR, FE and PER showed dietary vitamin C requirements of juvenile eel to be 41.1, 41.2, 43.9 and 43.1 (mg $kg^{-1}$ diet), respectively. These results indicated that the dietary vitamin C requirement could range from 41.1 to 43.9 mg $kg^{-1}$ diet in juvenile eel when L-ascorbyl-2-monophosphate was used as the dietary source of vitamin C.

• Journal of Community Nutrition
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• 제1권1호
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• pp.16-24
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• 1999

The purpose of this study was to investigate the association between adolescent smoking and antioxidant vitamins. Subjects were 87 non-smokers and 90 smokers. who were female high school students. Smokers were divided into tow groups by smoking status, 35 light smokers (packyear<1) and 53 heavy smokers(packyear$\geq$1). Dietary intakes were examined through questionnaires and nutrient intakes of vitamin C and A were analyzed by smoking status using Computer Aided Nutritional analysis program for professional (CAN-PRO). Serum vitamin C level was measured by 2,4-dinitrophenylhydrazine method and serum levels of vitamin A and E were measured by HPLC. Erythrocyte lipid peroxide levels was measured by thiobarbituric acid reactive substance (TBARS) method. All data were statistically analyzed by SAS PC package program. The mean vitamin C intakes of non-smokers, light smokers and heavy smokers were 58.2mg/day, 50.1 mg/day 58.1mg/day, respectively. The mean vitamin A intakes of non-smokers, light and heavy smokers were 28.1$\mu\textrm{g}$R.E./day, 278.7$\mu\textrm{g}$R.E./day and 289.6$\mu\textrm{g}$R.E./day, respectively. There was no significant difference in dietary intakes of antioxidant vitamins by smoking status. However, the serum vitamin C level, 11.40mg/l in heavy smokers was 12% lower than that of than that of 12.70mg/l in non-smokers. The serum vitamin A level was not significantly different among the groups. Vitamin E level, 8.79mg/l in heavy smokers was 8% lower than that of 9.53mg/l in non-smokers. There was no significant correlation between the dietary intakes and serum levels of vitamin A and C. The erythrocyte TBARS level, 1.90nmol/ml in light smokers was significantly lower (p<0.05) than 2.71 nmol/ml in heavy smokers or non-smokers. The correlation data showed that the cerythrocyte TBARS level had a significant positive correlation with packyear. Overall results might suggest that cigarette smokers with a longer smoking history need more dietary intakes of vitamin C and E than do non-smokers to reach the same serum level.

• 대한간호학회지
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• 제33권2호
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• pp.170-178
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• 2003

Purpose: This study was to determine the effect of oral vitamin C supplements on blood sugar and antioxidative status in Types II diabetes mellitus patients. Method: Data for the study were collected from June 24 to August 31, 2001. Participants(31) took 1g/day vitamin C for 4 weeks, after a 1 - week taking no Vitamin C, followed by Vitamin C 3g/day for 4 weeks. A baseline blood sample was obtained following a 12hour overnight fast and at the end of each 4week Vitamin C administration. Blood samples were taken for plasma vitamin C concentration, fasting blood sugar, HbA1c, superoxide scavenging activity and hydrogen peroxide scavenging activity. The data were analyzed by SPSS for repeated measures ANOVA. Result: Plasma vitamin C concentration was significantly increased over dose(F=3.316, p=.043). Fasting blood sugar and HbA1c was significantly decreased over dose(F=13.192, p=.000; F=11.995, p=.000). Superoxide scavenging activity and hydrogen peroxide scavenging activity was significantly increased over dose(F=486.138, p=.000; F=177.704, p= .000). Conclusion: The results suggest that megadose vitamin C supplementation may have a beneficial effect in diabetes mellitus patients on both glycemic control and antioxidant status. Thus dietary measures to increase plasma vitamin C may be an important health strategy for reducing the compliance of diabetic patients

• Preventive Nutrition and Food Science
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• 제1권1호
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• pp.80-86
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• 1996

Parathyroid hormone(PTH) is known to stimulate bone resorption and to inhibit bone collagen synthesis. In contrast, as the evidence of stimulation of bone formation by PTH has recently been observed, the study on the role of PTH involved in osteoporosis draws remarkable attention. This study has dealt with the role of alkaline phoshatase(AP), a marker enzyme for bone formation and osteoblast action, Animals(BALS/cmice) were divided into three dietary groups(high and medium Ca and Ca-free) and hormones including PTH, calcitonin(CT), cholecalciferol(citamin D) were i.p. injected. AP in the serum and liver was measured using Sigma 221 alkaline buffer solutions containing 9mM of p-nitrophenyl phoshate. Enzume was reacted at 37$^{\circ}C$ for 10 minutes and the reaction was stopped by 1.8ml of 0.1N NaOH and measured at 410nm. We found that serum and liver AP activity was increased by low dietary Ac. Compared to the control, and serum Ap activity was enhanced by PTH and vitamin D regardless of the dietary Ca. On the other hand, liver AP activity was inhibited by OTH and vitamin D at all levels of dietary Ca. CT inhibited the action of PTH and vitamin D in the serum. But, the inhibition of PTH and vitamin D action by CT was not observed in the liver, unlike in the case of serum.

• Journal of Nutrition and Health
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• 제46권5호
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• pp.427-439
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• 2013

The aim of this study was to determine whether Nutrition Quotient (NQ) for children, which has been developed from data on urban children, can be applied to children in rural areas. A total of 200 children (108 boys and 92 girls) in fifth and sixth grade at three elementary schools in rural areas of Gyeongbuk participated in the survey conducted during June 2012. Questionnaires consisted of items on food intake frequency and dietary behavior. Food intake data were obtained using the 24-hour recall method, and nutrient intake was calculated using the CAN-Pro 4.0 Program. Percentages of children who took less than the estimated average requirement were 76.5%, 49.5%, 45.5%, 33.5%, and 26.0% for calcium, vitamin C, iron, vitamin A, and folate, respectively. Significant associations were observed between intake frequencies of vegetables, kimchi, and fruits, and intake of vitamin C, folate, and dietary fiber. White milk and legumes showed positive correlation with intake of calcium and vitamin A. Eating breakfast, meal regularity, and diverse side dishes showed positive correlation with intake of folate and calcium. The 19 food checklist items could be categorized according to five factors. The mean NQ score of the subjects was 62.0, which was similar to that of urban children, 64.4. NQ score and factor scores for balance, regularity, and practice were significantly lower in children with lower socioeconomic level as compared to those with higher socioeconomic level. Higher NQ score showed an association with increased intake of vitamin B2, folate, vitamin C, and calcium. In conclusion, NQ offers a valuable instrument for evaluation of food habit and dietary quality of rural children as well as urban children, and children with low socioeconomic status should be monitored by testing with NQ checklist before implementation of nutrition programs.

• Asian Pacific Journal of Cancer Prevention
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• 제14권9호
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• pp.5189-5192
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• 2013

Aim: We aimed to investigate the associations of dietary intake of folate, vitamin $B_6$ and $B_{12}$ and MTHFR genotype with breast cancer in a Chinese population. Methods: A matched case-control study was conducted, and 435 patients with newly diagnosed and histologically confirmed breast cancer and 435 controls were collected. The folate intake, vitamin $B_6$ and vitamin $B_{12}$ were calculated, and MTHFR C665T, C677T and A1298C were analyzed by PCR-RFLP. Results: We found vitamin $B_{12}$ was likely to reduce the risk of breast cancer, and MTHFR 665TT was associated with increased risk of breast cancer. Folate intake, vitamin $B_{12}$ intake and variants of MTHFR C677T and MTHFR A1298C demonstrated no association with risk of breast cancer. However, we found patients with low intake of vitamin $B_6$ and MTHFR 665TT genotype had a higher risk of breast cancer (OR=1.87, 95% CI=1.29-2.77), the association being less pronounced among subjects with a moderate intake of vitamin $B_6$ and MTHFR 665TT genotype (OR=1.58, 95% CI=1.03-2.49, P=0.03). Conclusion: Our study indicated that the MTHFR C665T polymorphism and vitamin $B_6$ are associated with risk of breast cancer, which indicated roles for nutrients in developing breast cancer.

• Journal of Nutrition and Health
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• 제46권2호
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• pp.177-185
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• 2013

본 연구는 현재 한국의 대학에 재학 중인 중국인 여대생 114명을 대상으로 중국인 유학생들의 영양소 섭취상태를 조사하고, 중국과 한국에서의 식습관 변화 및 식습관 변화에 따른 영양소 섭취상태를 평가하고자 수행되었으며, 그 결과를 요약하면 다음과 같다. 1) 중국인 유학생의 평균 에너지 섭취량은 $1,586.9{\pm}474.2$ kcal였고, 탄수화물, 단백질, 지방의 구성비는 56 : 14 : 30으로 나타났으며, 전체 대상자의 23.7%가 단백질의 평균필요량에 미치지 못하고 있었고 43%가 권장섭취량에 미만으로 섭취하고 있었다. 엽산의 평균필요량 미만으로 섭취하는 비율은 대상자의 93%였고, 대상자의 60~70%가 칼슘, 아연, 비타민 A, 비타민 $B_2$, 비타민 C을 평균필요량 미만으로 섭취하는 것으로 나타났다. 2) 중국 유학생의 총 식습관 점수는 $64.3{\pm}9.9$점으로 유학전 $75.9{\pm}9.9$점에 비해 유의적으로 낮아졌으며 (p < 0.001), 특히 식사의 규칙성과 균형성, 아침식사 여부 및 단백질 식품, 녹황색 채소와 과일 등의 섭취빈도가 좋지 않은 방향으로 변화되었고, 가공식품의 섭취와 외식의 빈도는 더 많아진 것으로 조사되었다. 3) 한국 유학 전 후의 식습관 혹은 식행동 변화 여부에 따른 영양소 섭취 수준을 비교한 결과, 한국에 온 이후 아침 결식률이 높아진 사람들은 단백질, 지방, 칼슘, 비타민 $B_2$ 및 니아신의 섭취량이 낮았고, 또 중국에서 보다 녹황색 채소를 더 적게 먹게 된 경우는 식이섬유소와 비타민 C를, 우유 및 유제품의 경우는 단백질과 칼슘비타민 $B_2$와 비타민 $B_6$를 비롯하여 비타민 E와 엽산을 적게 섭취하는 것으로 나타났다. 본 연구 결과, 성인기 식생활과 건강을 결정하는 20대 초반 재한 중국인 여대생들의 경우 바람직하지 않은 식습관과 이로 인한 영양 섭취 상태의 불균형을 나타내는 것으로 조사되었다. 이상의 결과는 고국을 떠나 낯선 문화에 적응하여야 하는 중국인 유학생들에 대한 영양교육 프로그램의 개발과 식생활 관리가 필요하다고 하겠다. 또 올바른 식생활의 정립은 심리적, 정서적 건강상태에도 영향을 미칠 수 있으며, 대학생활의 적응과 성공적인 유학생활에도 도움이 될 것으로 생각된다.

• 대한영양사협회학술지
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• 제11권1호
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• pp.1-10
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• 2005

This study was carried to investigate the effects of alcohol intake on the dietary behaviors and nutrient intakes of students in university and was observed characteristics of alcohol drinking, smoking, dietary behaviors, and nutrient intakes of students. The mean of alcohol consumption was 25.7$\pm$21.7g/day and 47.5$\pm$25.8g/day, most high of high alcohol group in the male student than other groups. Smoking were high by increasing of alcohol intake. Most students had dietary problems as skipping meals, eating snack after dinner, high frequency of eating fast and instant food, and eating meals at watching TV or video. The dietary behavior problems in the high alcohol groups showed higher in the female students than the male students. Nutritional knowledge scores was no significantly different by sex and alcohol intake. The intakes of calorie, protein, phosphorous, iron, and niacin in the male students was significantly higher than those of female students. Except for calcium, vitamin $B_2$ and vitamin C, nutrients were satisfied to the level of Recommended Dietary Allowances(RDA). Nutrient intakes was not affected by alcohol intake. But intakes of calorie, protein, phosphorous, and iron were affected by sex and vitamin C intake was affected by sex and alcohol intake.