• Korean Journal of Community Nutrition
• /
• v.5 no.3
• /
• pp.432-443
• /
• 2000

Smoking can increase oxidative stress and thereby change the antioxidant defense system in the body. Supplementation of antioxidant vitamins might improve antioxidant status in the body. The purpose of this study was to evaluate the effectiveness of vitamin C supplementation and smoking cessation education on changes of antioxidant status and psychosocial factors related to smoking. To obtain above purposes, we investigated the effectiveness of intervention for male adolescent smokers were evalnate by assessing changes in dietary intakes, plasma antioxidant vitamin concentration, and psychosocial factors related to smoking after program completion. Subjects, male adolescent smokers, were assigned into four groups : Control group(19 students), Educ. group(19 students), Vit. C supple. group(19 students), and Educ.+Vit. C suppl. group(19 students). The Educ. group and Educ.+Vit. C suppl. group received nutrition and smoking cessation education once a week for 5 weeks. Vit. C suppl. group and Educ.+Vit. C suppl. group received 500 mg per day of ascorbic acid for 35 days. All data were collected before and after intervention. Vit. B$_2$and Vit. C intakes of all groups were increased, but the only Ca intake was increased in the Educ. group. Plasma Vit. C concentration and Ratio(plasma Vit. C/Vit. C intakes) were increased in the Vit. C suppl. group and Educ.+Vit. C suppl. group, and the Vit. C deficiency status of these groups(Vit. C suppl. group and Educ.+Vit. C suppl. group) disappeared. Showing the effects of Vit. C supplementation, plasma $\alpha$-tocopherol was increased in the Educ. and Educ.+Vit. C suppl. group, and especially high increases were seen in the Educ.+Vit. C suppl. group. Psychosocial factors related to smoking changed after the education a little. This intervention program had an impact on nutrition intakes, plasma antioxidant vitamins, and some beliefs related to smoking in male adolescent students. Various programs of nutrition and smoking cessation education and vitamin supplementation for quitting smoking must be implemented for adolescent smokers, and further studies are needed regarding sorts and amount of antioxidant nutrients and supplementation periods.

• Journal of Animal Science and Technology
• /
• v.58 no.2
• /
• pp.9.1-9.5
• /
• 2016

Background: Literature is lacking on the effects of feeding by-product feed (BF)-based silage on rumen fermentation parameters, nutrient digestion and nitrogen (N) retention in sheep. Therefore, this study was conducted to determine the effect of replacing rye straw with BF-based silage as a roughage source on ruminal parameters, total-tract apparent nutrient digestibility, and N balance in sheep. Methods: The by-product feed silage was composed of spent mushroom substrate (SMS) (45 %), recycled poultry bedding (RPB) (21 %), rye straw (11 %), rice bran (10.8 %), corn taffy residue (10 %), protected fat (1.0 %), bentonite (0.6 %), and mixed microbial additive (0.6 %). Six sheep were assigned randomly to either the control (concentrate mix + rye straw) or a treatment diet (concentrate mix + BF-based silage). Results: Compared with the control diet, feeding a BF-based silage diet resulted in similar ruminal characteristics (pH, acetate, propionate, and butyrate concentrations, and acetate: propionate ratio), higher (p < 0.05) ruminal NH3-N, higher (p < 0.05) ether extract digestibility, similar crude protein digestibility, lower (p < 0.05) dry matter, fiber, and crude ash digestibilities, and higher (p < 0.05) N retention (g/d) Conclusion: The BF-based silage showed similar energy value, higher protein metabolism and utilization, and lower fiber digestion in sheep compared to the control diet containing rye straw.

• Korean Journal of Community Nutrition
• /
• v.13 no.1
• /
• pp.24-33
• /
• 2008

The purpose of this study is to examine the nutrition knowledge, characteristics related to, nutrient intakes, anthropometrics, biochemical indices of university female students by major (food and nutrition versus physical science). Data were taken from 120 university female students (60 from each major) and the results follows. The mean age of the subjects was 19.6 years old. Most of subjects responded that they were healthy; subjects majoring in physical science scored higher in regular exercise (p < 0.01) and were more satisfied with their own body figures (p < 0.01), compared with the counterparts. The total nutrition knowledge score was $81.01{\pm}12.3$ for food and nutrition majors and $72.5{\pm}15.2$ points for physical science majors. (p < 0.01) The percentages of body fat were significantly higher in the food and nutrition students than the counterparts. (p < 0.001) The result of biochemical analysis showed that both groups were in normal range. But there was some statistically significant difference between groups in GTP, HDL-cholesterol and ALP levels. It suggests that regular exercise might have a positive effect on the body. This study showed that although both groups had different knowledge of nutrition, there was not much difference in the intakes of nutrients. But especially, the intakes of calcium and iron were quite low in both groups. Subjects majoring in Physical science had more lipid intake, but they had lower body fat. This suggests that regular exercise in this group might have effects on the percentages of body fat. In future study, nutrition education might be planned to increase nutrition knowledge and to connect nutrition knowledge to eating behaviors and to promote health to regular exercise. Also, the desire and the social perception for pursuing alean body figure and being underweight should be changed for optimal health.

• Korean Journal of Community Nutrition
• /
• v.17 no.4
• /
• pp.463-478
• /
• 2012

This study investigated the health and nutritional characteristics according to household income level and obesity in Koreans aged over 50 years based on the 2005 National Health and Nutrition Examination Survey. Subjects were classified into 3 groups by average household income with reference to the minimum monthly living expenses (MLE): low (n = 319, < 100% MLE), middle (n = 222, < 200% MLE), high (n = 411, ${\geq}$ 200% MLE) and each group was compared by BMI index. With increasing income level, the prevalence of systolic hypertension and hyperlipidemia was increased. In the low income group, serum total cholesterol, triglycerides, and fasting glucose were higher in the obese compared with the normal. In the middle and high income groups, the prevalence of hyperlipidemia and diastolic hypertension were higher in the obese. Subjects had nutritional imbalance, such as inadequate intake of calcium and potassium. With increasing income level, the percentages of protein and fat to total calorie were increased in addition to the intakes and density of nutrients. The obese in the low income group had higher intakes of energy, protein, phosphorus and higher consumption frequency of cereals and potatoes compared with the normal. It was shown that the obese of the middle and high income groups tended to have lower consumption frequency of Korean cabbage and higher frequency of fruits. The obese of high income group also had binge drinking habit. Therefore, this study suggests that specific approaches based on economic status should be considered in developing nutrition education program for the elderly.

• Journal of the Korean Society of Food Culture
• /
• v.29 no.5
• /
• pp.390-405
• /
• 2014

The aim of this study was to investigate the actual conditions underlying frequency of eating breakfast and nutritional attitudes in elementary school students in Chungnam area. Students had the highest ratio for eating breakfast everyday and spent 10-20 minutes eating breakfast. Students went to bed at 10-11 PM and woke up at 7-7:30 AM in the morning on average. The biggest reason for skipping breakfast was insufficient time in the morning. Additionally, favorite breakfast menu of subjects was a Korean style meal. The number of elementary students that recognized necessity of nutritional education was highest among subjects. Favorite educational method of subjects was education by teachers. Additionally, number of female students that recognized effect of breakfast on health status was significantly higher than boy students. Ratio of eating breakfast everyday was dependent on BMI value. Most subjects preferred video learning materials as the main nutritional education method. Overweight subjects showed the highest ratio for eating with loss of willpower compared to other students when they skipped the breakfast. Female subjects ate a greater variety of foods compared to male students, and showed better nutritional attitudes towards a desirable dietary life than male subjects. To prevent undesirable food habits and improve intake of various nutrients, systematic nutrition education is required to regulate breakfast of elementary students.

• Journal of the Korean Dietetic Association
• /
• v.8 no.3
• /
• pp.311-317
• /
• 2002

The purpose of this study was to analyse the nutrient intake of the elementary students participating in the School lunch program and to compare the amount of the plate waste generated in two school foodservice operations that were located in an urban(school A) and a rural area(school B), respectively. A plate waste analysis was conducted for each menu item to separate and quantify food waste discarded in service phases of each operation. The SPSS 10.0 for window was used for data analysis. Non-parametric test (Mann-Whitney) was adopted to determine if significant differences existed in amounts of food waste generated in school A and school B. An average of 415 meals, including 43 adult meals, were served daily in school A, while an average of 177 meals, including 24 adult meals, were served daily in school B. Throughout the study the percentage of plate waste in vegetable dishes was high in both school. The food served to the students in school A met most of the RDA set by Korean Nutrition Association except vitamin A, while that served to the students in school B satisfied RDA in all aspects. Between 10-20% of the nutrients served were discarded as plate waste(school A : 11-27%; school B : 5-14%). Students in school B took significantly more niacin than students in school A did. It should be noted, though, that the RDA was still met in both schools except the vitamin A in case of school A, even after considering the plate waste. The research results suggested that school foodservice dieticians should evaluate the acceptability of menu items based on food waste per meal, and help increase the students' awareness of the environmental impact of food waste. Further, teachers, parents and dieticians should be encouraged to provide environmental education to the students that focused on the reduction of food waste.

• Preventive Nutrition and Food Science
• /
• v.8 no.4
• /
• pp.412-418
• /
• 2003

To evaluate the school lunch program served by elementary schools in Muan, Korea, we examined children's preference for the dishes offered on the menus. School lunch program menus showing the food composition of 400 meals (100 meals in each season) were collected. The serving frequency of each dish on the menus was counted. Eighty-seven representative dishes were selected based on the serving frequency and preference for each dish was determined by a survey of 414 elementary school students who were served by the school lunch program. We also analyzed the nutrient contents of each representative dish. Among the prepared foods, children indicated the highest preference for desserts. Steamed rice was served more frequently as a main course than one dish meals, although children preferred one dish meals to steamed rice. Among side dishes, those that were deep-fried were the most preferred. Children indicated high preference for fruits, milk, and eggs, and low preference for fish and clams, vegetables, and beans. The serving frequency with which main courses, soups, and side dishes were served showed no correlation with children's preference for each. Preference for dishes correlated positively with nutrient contents of calories and lipids, but negatively with nutrient contents of fiber, calcium and vitamin A. According to these results we can suggest that dietitian should consider children's preference into greater consideration to increase menu acceptability and thereby reduce waste. Children need to be educated about the roles and contents of nutrients in food and the fact that preference for foods affects nutrient intake.

• Korean Journal of Community Nutrition
• /
• v.7 no.2
• /
• pp.277-285
• /
• 2002

The purpose of this study was to develop a semi-quantitative food frequency questionnaire (SQ-FFQ) for subjects aged 50yr and over and to evaluate the validity of this SQ-FFQ. Dietary intake was assessed using SQ-FFQ that included 98 commonly consumed flood items selected from the results of the Korean Health and Nutritional Survey, 1998. Subjects (n = 2,660) aged 50yr and over were recruited from 7 metropolitan cities and 8 small cities. Each subject was interviewed using this SQ-FFQ developed in our laboratory and 24hr-recall method. Excluding incomplete data, Data from 1,149 subjects were used in this validity study. The nutrient intakes assessed by this SQ-FFQ were validated by comparing with the results from 1 day 24-hour recalls. Pearson's correlation coefficients between two methods were 0.71, 0.64, 0.53, and 0.43 for energy, carbohydrate, protein, and fat, respectively for all subjects. Spearman's correlation coefficients were higher than those of Pearson's correlation coefficients. Kappa values for energy, carbohydrate, protein, and fat were 0.79, 0.72, 0.70, and 0.64, respectively. The percentage for misclassification of the lowest quartile into the highest quartile or vice versa was 1.25-1.39% for all nutrients. Therefore, this SQ-FFQ seems to be useful in assessing the nutritional status of the middle-aged and elderly subjects in Korea.

• Journal of the Korean Home Economics Association
• /
• v.17 no.3
• /
• pp.23-34
• /
• 1979

Adequate intake of nutrients exert a profound influence on the physical and spiritual development of children. Thus, it is important to children and their mothers about nutrition and selection of nutritious foods. In order to underline the importance of nutrition for children, this study investigated and analyzed food habits of children expecially those in preschool ages, to obtain basic data to develop effective educational materials related to nutrition. dietary habits of 61 boys and 44 girls in the average age of six were surveyed through their mothers. Results therefrom are as follows : 1. Only 17 per cent of the mothers questioned replied that they considered the balance of diet in preparing meals, while 58.1% of the mothers gave precedence to the liking of their family . The lower the educational level of a mother , the higher her stress on the food preference of her family. 2. Seventy six of the mothers said they understand the basic food group , but only one mother displayed an accurate knowledge about it. 3. As for between meal eating , 82.9% took fruits, 68.6% milk, 35.2 bread, and 33.3% cookies. 4. Problems with food habits of children were : Unbalanced diet for 43.8% of children ,eating of snacks at irregular intervals for 26.7% and TV impact for 5.7%. 5. Children's food habits are greatly influenced by their parents, In the case of animal liver, 32.1 % of the children surveyed do not like to eat it, while 35.8% have never tasted it . 27.9% of children also do not like to eat cereals. Children's likes and dislikes with regarded to foods were influenced greatly by their parents. Thus, it is urgent to educate mothers about balanced diet and basic food group. Children will have to be taught to understand unfavorable effects of unbalanced diet so that they may correct their unsound food habits. This study also indicated the need for developing new cooking methods for those food items which are very liked by children to be a major cause of their unbalanced dietary habits.

• Korean Journal of Agricultural Science
• /
• v.39 no.4
• /
• pp.555-559
• /
• 2012

Distillers dried grains with solubles (DDGS) is a by-product from processing corn to produce bio-ethanol, and it contains almost three times higher protein, fat, and fiber than corn. Intake of higher amount of nutrients originated from corn in lactating sows may contribute to changes in milk composition and thus alter the growth of suckling piglets. Therefore, the objective of this study was to evaluate effect of supplementing DDGS in the diet of lactating sows on variation in the body weight of piglets. A total of 50 sows with parities of 3 to 5 were usedand allottedinto one of four treatments which included 0 (CON), 10% (DDGS10), 20% (DDGS20), or 30% (DDGS30) DDGS in the diet. Diets were fed to sows during the whole lactation period. Individual body weights of piglets were measured within 24 h after farrowing and at weaning. No significant differences were observed inthe coefficient of variation (CV) for body weight of piglets within a litter after farrowing and at weaning among the treatments (p>0.05). There was, however, a tendency of decreases in the CV for body weight of piglets within a litter at weaning compared with that after farrowingin the DDGS10 and DDGS20 treatments. At weaning, the percentage of the number of piglets weighing less than 4.5 kg in DDGS20 (4.86%, 7 out of 144; p<0.05) or DDGS30 (5.04%, 6 out of 119; p=0.059) was lower than that in CON (12.41%; 17 out of 137) although this pattern was not observed in DDGS10. In conclusion, addition of DDGS in lactating sow diets improved piglet performance by reducing the number piglets weighing less than 4.5 kg.