• Asian-Australasian Journal of Animal Sciences
• /
• v.14 no.10
• /
• pp.1394-1399
• /
• 2001

Influence of pre-weaning nutrition on post-weaning gain was assesses under intensive feeding in Malpura lambs. Thirty six Malpura (15 days old) lambs divided in to 3 equal groups were maintained on high (G1), medium (G2) and low (G3) energy and protein containing creep mixture with free suckling and ad libitum roughage (pala leaves: Ziziphus nummularia) up to 90 days of age. The lambs during post-weaning phase were fed on a 40:60 roughage and concentrate based composite diet to assess their post-weaning growth response. Total dry matter intake in pre-weaning phase was higher (p<0.01) in G3 than G2 and G1 while feed conversion efficiency was better in G1 than G2 and G3. The birth weight, 15 days body weight and weaning weight were however similar in the three groups. The finishing body weight, total body weight gain and average daily gain during post-weaning phase were higher (p<0.01) in G3 than in G1 and G2. The lambs in G3 consumed more (p<0.01) dry matter during post-weaning phase along with better feed conversion efficiency than other two groups. However, the DCP intake/kg body weight gain was higher in G1 than G2 and G3. Digestibility of DM, OM, CP, NDF, ADF and energy were similar among the three groups during post-weaning phase. Percent nitrogen retention as nitrogen intake was higher (p<0.01) in G3 (71.1%) than G1 (67.7%) and G2 (69.7%) during the post-weaning phase of study. The G1, G2 and G3 lambs in post-weaning phase consumed 8.1, 7.7 and 8.1 g DCP and 246.8, 227.2 and 246.1 kcal $DE/kg\;W^{0.75}/d$ and had 84.4, 80.0 and 111.1 g average daily gain, respectively. It is concluded that the lambs fed on low energy and protein containing creep mixture in pre-weaning phase showed improvement in growth during post-weaning phase under optimum feeding regime.

• Korean Journal of Community Nutrition
• /
• v.14 no.5
• /
• pp.483-494
• /
• 2009

In order to give basic data to teenager's healthcare, we investigated the food habits according to BMI (Body Mass Index), life style, dietary related self-efficacy and food intake through conducting a research surveying 732 middle school students of the Kwang-ju and Chonnam areas. The results of this study were compared groups in under weight (UW), normal weight (NW), and overweight (OW) groups according to BMI levels. In the male students, height was significantly differently in the UW group as $158.2\pm0.7$ cm compared to other NW and OW groups respectively as $163.7\pm0.6$ cm and $162.6\pm0.7$ cm but in the female students there was no significantly difference within groups. Weight was significantly different between the groups in the male students, whereas there were minor differences in the female students. The average of BMI was $20.7\pm0.1$ on the male students and $20.6\pm0.1$ on the female students which were all within the average, and their obesity was increased as the school grade was higher. Under less than 30,000 won of pocket money was dominating, and most of the students were in a nuclear family. In all male and female students, the inactive hours like watching TV and using computers had no differences between groups. The difference between groups was minor on breakfast time and most of the students thought their problems on unbalanced diet. There was significant difference in the OW group in female students as they thought their problems on unbalanced diets. The frequency of snack was significantly low in the OW group of male students but there were no differences in snack and eating-out food. All students chose fruits as snack food and Korean-style food as eating out food. The OW group in male students were significantly low in the dietary related self-efficacy when they were with their families and feeling depressed but there were no differences in female students between groups. When all students were getting higher BMI, they evaluated themselves badly in their self-dietary habits. Also the more male students had non-physical activity time, the less they had the dietary related self-efficacy and the more female students had physical activity time, the higher they had the dietary related self-efficacy. In conclusion, the OW group had good habits in physical activities for weekends, meal times, frequency of snack consumption but it showed undesirable when they were low in dietary related self-efficacy. Therefore we will provide the systematic nutrition education to them through this study.

• Journal of Nutrition and Health
• /
• v.51 no.1
• /
• pp.31-39
• /
• 2018

Purpose: The aim of study was to determine the effects of carbohydrate, fat, protein, and fiber contents on glycemic responses in a single food item or meal. Methods: Glycemic responses were measured in 30 healthy young adults (17 males and 13 females) with various test foods, including rice, egg whites, bean sprouts, olive oil, noodles, prune, broccoli, Korean dishes, Western dishes, and salad dishes, etc. Test foods were designed to contain various carbohydrate, fat, protein, and fiber contents in single or mixed foods or dishes. After 12 hours of fasting, participants consumed test foods, and the glycemic response was measured for a subsequent 120 min (0, 15, 30, 60, 90, and 120 min). Three hundred and fifty three glycemic responses from 62 foods were collected. The incremental area under the curve (AUC) was calculated for each test food for each subject to examine glycemic responses. Statistical analysis was conducted to identify which macronutrient (carbohydrate, fat, protein and fiber) affected the AUC using a mixed model. Results: Carbohydrates (${\beta}=37.18$, p < 0.0001) significantly increased while fat (${\beta}=-32.70$, p = 0.0054) and fiber (${\beta}=-32.01$, p = 0.0486) significantly reduced the glycemic response. Conclusion: It can be concluded that the glycemic response of a meal can be modified depending on the fat and fiber contents of ingredient foods, even though carbohydrate content is maintained.

• Journal of Agricultural Extension & Community Development
• /
• v.4 no.1
• /
• pp.269-281
• /
• 1997

This study intended to compare rural development programs between China and Thailand, focused on research and extension activities. In China, Agricultural Science Administration(ASC) took charges in agricultural research, and under the ASC there were 39 agricultural organizations throughout the country. There were distinctive differences as to condition of agricultural areas, under-developed area at middle and developing area by sea and river. To improve agricultural production in China, diffusion of new agricultural technology would be important along with supplying equipment such as soil test kits, plant nutrition analysis sets and vehcles for extension educators. In Thailand, under the Ministry of Agriculture & Cooperatives, there were five departments, seven divisions and eight national enterprises. Among them, Department of Agriculture was in charge of agricultural research while the Department of Agricultural Extension for extension services. Each department had sub-division and provincial organization including personnel management and budget. However, the relationships and consistency between the Department of Agriculture and the Department of Agricultural Extension needed to be improved for better cooperation of research and extension.

• Communications for Statistical Applications and Methods
• /
• v.25 no.1
• /
• pp.1-13
• /
• 2018

In many studies, a researcher attempts to describe a population where units are measured for multiple outcomes, or responses. In this paper, we present an efficient procedure based on ranked set sampling to estimate and perform hypothesis testing on a multivariate mean. The method is based on ranking on an auxiliary covariate, which is assumed to be correlated with the multivariate response, in order to improve the efficiency of the estimation. We showed that the proposed estimators developed under this sampling scheme are unbiased, have smaller variance in the multivariate sense, and are asymptotically Gaussian. We also demonstrated that the efficiency of multivariate regression estimator can be improved by using Ranked set sampling. A bootstrap routine is developed in the statistical software R to perform inference when the sample size is small. We use a simulation study to investigate the performance of the method under known conditions and apply the method to the biomarker data collected in China Health and Nutrition Survey (CHNS 2009) data.

• Journal of Community Nutrition
• /
• v.5 no.1
• /
• pp.37-43
• /
• 2003

Iron deficiency and anemia are severe nutrition problems in most of Korea. Iron intake, especially iron with better bioavailability is insufficient over a total age group. Recent changes in diet and life style of Koreans have been repeatedly suggested problems caused by excess nutrient intake rather than under intake. Despite the changes in diet patterns, iron deficient anemia is still prevalent in many parts of Korea. Eight hundred and fifty subjects (323 male and 527 female subjects) in Asan were recruited from farming, factory and urban area. Each subject was interviewed to assess nutrients intakes according to a 24hr-recall method. Twelve hour fasting blood samples were collected to vacutainer with EDTA for hemoglobin (Hb) and separate the tubes for serum iron (SI) and total iron binding capacity (TIBC). The mean serum iron value of female subjects in the factory area was significantly higher (p < 0.05) than that of the female subjects in the urban area although subjects in urban area showed significantly higher the dietary iron intake for both the men and woman (p < 0.05). Dietary iron intake for the younger women was lowest in the farming area and those in the urban area showed the highest dietary iron intake (p < 0.05). When the dietary iron intake was compared by different the age groups, dietary iron intake of the older women from animal sources was less than that of younger women in the urban area (p < 0.05). Dietary iron intake of Asan residents was not sufficient regardless of age, sex and regions and intake of heme iron was especially lower than nonheme iron. (J Community Nutrition 5(1) : 37∼43, 2003)

• Preventive Nutrition and Food Science
• /
• v.7 no.3
• /
• pp.293-298
• /
• 2002

Carnitine is considered a conditionally essential nutrient because dietary sources may become important under conditions which either reduce biosynthesis or increase urinary excretion of carnitine. Therefore, it is important to have a database for dietary analysis for carnitine content. Because there is limited data available for the carnitine content of Korean foods, this study was undertaken to analyze the total carnitine (TCNE) content of 146 commonly consumed Korean foods. TCNE concentrations were assayed using a modified radioisotopic method. Beef and pork contained 91.09 and 17.21 mg TCNE / 100 g weight, respectively. Fish and shellfish ranged from 0.28 to 24.87 mg TCNE / 100g weight. TCNE concentration in milk was 1.77 mg / 100 mL and cheese was 0.49 mg / 100 g weight. Cereals and pulses contained between 0 and 1.43 mg TCNE / 100 g weight. The TCNE concentration of most fruits and vegetables was between 0 and 0.7 mg 1100 g weight. However, mushrooms contained between 2.77 and 7.02 mg of TCNE / 100 g weight. Soy sauce, soybean paste and fermented red pepper soybean paste contained 1.05, 0.28 and 0.5 mg TCNE / 100 g weight, respectively. These results demonstrate that TCNE concentrations are high in meat, fish, shellfish and milk, but low or non-existent fruits and vegetables. However, mushrooms are a substantial source of vegetable derived TCNE. These data will be useful in establishing a database for determining the TCNE content of Korean diets.

• Journal of Korean society of Dental Hygiene
• /
• v.10 no.1
• /
• pp.141-156
• /
• 2010

Objective : This study was conducted to examine the relationships among health & oral health promotion behavior according to BMI. The subjects in this study were 704 high school students. Methods : A survey was conducted, and Chi-square, T-test, ANOVA, and Pearson's correlation coefficient were used for data analysis. The findings of the study were as follows; Results : Man is normal weight group accounted for 65.9%, and women is 69.7%(p<0.001). Health & oral health promotion behavior of nutrition(p<0.01) and exercise(p<0.001) that men were higher than women. But health responsibility was higher to women(p<0.001). As to the relationship for the BMI to health promotion behavior, nutrition is over weight group accounted for 3.45, obesity group 3.43, normal weight group 3.26 and under weight group 3.16(p<0.05). Exercise is over weight group accounted for 2.70(p<0.05), and nutrition for oral health is obesity group accounted for 3.47(p<0.05). As for correlation among the BMI, stronger social support, more exercise, better nutrition for oral health, there was a statistically significant relationship between BMI. As the factors significantly affecting BMI, their satisfaction level with exercise, nutrition for oral health, life appreciation, stress management for oral health. Conclusions : This study suggested that health & oral health promotion behavior of high school students in an effort to help improve policy setting on health projects and determine how to teach teens to promote their health throughout their lives.

• Korean Journal of Human Ecology
• /
• v.22 no.5
• /
• pp.507-518
• /
• 2013

This study aims to investigate the usage of school tuck-shops by students and the desire for healthy tuck-shop according to the frequency of snack. From April 4 to April 13, 2012, a survey was conducted on 348 2nd grade high school students from six high schools in Daejeon Metropolitan City. The snack frequency in school tuck-shops was divided into 3 groups: 2 times a week or less(lower snack group), 3~4 times a week(middle snack group), 5 times a week and above(upper snack group). Out of total subjects, lower snack group was 41.4%, middle snack group 21.8% and upper snack group 36.8%. The upper snack group showed more in male students and more in the students with monthly pocket money more than 50,000 won and more expense per snack. The main reason for taking snacks was hunger at approximate 70% of total subjects, however, no difference was found in reasons by frequency of snack. About 90% of total subjects wanted healthy tuck-shop in school, but upper snack group showed less percentage and less care for healthy snacks. This result suggests that under the circumstance that most of high school students take snacks for relieving themselves from hunger at schools, it is desired to run healthy school tuck-shops in Daejeon Metropolitan, dealing with healthy snacks of balanced nutrition at resonable prices and to implement nutrition education programs especially for high frequent snack takers.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.16 no.4
• /
• pp.300-305
• /
• 1987

Changes in pigments of freeze dried grasshopper in refrigerator were determined to asses the storage stability. In storage at $5^{\circ}C$, chlorophyll contents were drastically decreased but pheopytins were increased. The degradation of chlorophylls get under controlled with vacuum package. The pigments extracted from 98 days stored samples were fractionated by silicic acid column and obtained 3 portions (3a, 3b and 3d). These portions were compared Rf values (0.75, 0.56, 0.50, respectively) and absorption spectra (408, 666nm; 419, 651nm; 433, 655nm, respectively) with that of standard and were identifed pheophytin a and b and 'changed' chlorophyll a. Especially, pheophytins a and b were great strength accelerated to lipid oxidation.