• Korean Journal of Community Nutrition
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• v.6 no.3
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• pp.317-330
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• 2001

The purpose of this study was to figure out the characteristics of dietary habits and lifestyles related to the development of insulin resistance syndrome(IRS). The participants in this study were 595 adults with one or more abnormal data from a health examination and 215 normal adults. When IRS was defined as a condition in which the subjects have 2 or more abnormalities among obesity, hyperlipidemia, hypertension and hyperglycemia, the prevalence rate was 37.8%. We classified the 595 adults by the number of components of IRS components they had, the higher age and obesity index they had. Total cholesterol and glucose levels in the blood were also positively related to the number of IRS components. IRS subjects tended to practice less habitual drinking and more exercise and weight control. Coffee consumption and dining out frequency were also lower in the IRS group. An analysis of food habits by odds ratio indicated that total food score was better in the IRS group. However, it appeared that food habits such as \"frequent snacking\" and \"never rejecting offered foods\" need to be improved in IRS subjects. Other undesirable food habits were related to the consumption of eggs, dairy products, fried foods, garlic and onion. Dietary intake of Ca, Fe, riboflavin, Vit A, and energy were less than 75% of the Korean recommended allowance for more than half of the subjects. Nutrient intake was lower, Ca/P ratio from food intake was worse in the IRS group. Our results indicated that nutrition counseling for IRS need to be focused on balanced food intake to supply sufficient amount of each nutrient.nt of each nutrient.

• Journal of Nutrition and Health
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• v.36 no.6
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• pp.570-576
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• 2003

The remarkable change of phenomenon induced by stress increase energy metabolism that can induce many reactive oxygen species (ROS) production. ROS can peroxidize cellular macromolecules including lipid and protein. The object of this study was to investigate whether stress may induce cellular damage by producing ROS and whether vitamin E, as a strong lipid-soluble antioxidant, can protect cells against reactive oxygen species produced by noise and immobilization stress in SD rats. The stress group increased 5-hydroxyindole aceti acid (5-HIAA) , one of the stress hormone, in brain tissue and free fatty acid in plasma. Vitamin I treatment had no effect on 5-HIAA but free fatty acid contents decreased with a fortified vitamin I diet. Furthermore, the body weight of vitamin I-treated rats increased more than that of the stress group. Lipid peroxidation and protein degradation as an index of oxidative damage in brain tissue decreased with the use of the fortified vitamin I diet supplement. The results suggest that vitamin I supplements have a protective effect against noise and immobilization stress-induced oxidative damage in brain tissue.

• Applied Biological Chemistry
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• v.27
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• pp.56-67
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• 1984

As in many other country, the use of organic matter in Korea has long history. Farmers understand the value of organic matter as the source of plant nutrient and soil improving agent in general. Since 50 years ago, the sources of organic matter in paddy soils were compost, rice and barly straw, green manure, animal waste, fish and beancake, etc.. Application of green manures such as vetch and chinese milk vetch showed no significant effect on the yield of brown rice in paddy soil. On the other hand, the effects of compost and rice straw showed more significant on the yield of brown rice in paddy soil. Application of rice straw in rice cultivation is commonly made at different times between harvest, early spring and several weeks before transplanting. Considering the suitable paddy soil for application of rice straw under well to moderately well drained soil, the yield was pronounced more than poorly drained soil. Based on laboratory and field experimants, application of rice straw promoted the decrease of oxidation-reduction potential in well to moderately well drained soil. This results to be enhanced the release of some mineral nutrients,. such as potassium, calcium, silicon, and increase of availability of soil phosphorus. In the field experiments, results obtained from nitrogen fraction on the immobilization-mineralization of the tracer nitrogen applied in paddy soil,the amount and index of organic nitrogen incoporated in soil was more pronounced in rice straw application than control. Rice straw and its transformation products incoporated in the soil, provided the inflow of energy necessary to maintain heterotrophic microbes activities. Rice straw and its transformation products, especially soluble carbohydrate, enhanced the population of free-living heterotrophic $N_2$ - fixing microbes. Moreover, rice straw and its transformation products in paddy soil, enhanced the activities of soil enzymes such as dehydrogenase and urease.

• The Korean Journal of Ecology
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• v.27 no.4
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• pp.245-256
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• 2004

The simple biosphere model 2 (SiB2), which is one of the land surface models, simulates the exchange of momentum, energy and mass such as water vapor and carbon dioxide between atmosphere and biosphere, and includes the biochemical sub-model for representation of stomatal conductance and photosynthetical activities. Throughout the SiB2 simulation, the significant information not only to understand of water and carbon budget but also to make an analysis of interaction such as feed-back and-forward between environment and vegetation is given. Using revised SiB2-Paddy, one sample study which is the evaluation of the runoff in Chaophraya river basin according to land use/cover change is presented in this review. Hence, SiB2 is available in order to ecological studied, if revised SiB2 for realistic simulation about soil respiration, computing leaf area index, vegetation competition and soil moisture is improved.

• Journal of Ecology and Environment
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• v.34 no.2
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• pp.203-214
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• 2011

The objectives of this research were to predict land-use/land-cover change at the Sakaerat Environmental Research Station (SERS) and to analyze its consequences on the distribution for Black-crested Bulbul (Pycnonotus melanicterus), which is a popular species for bird-watching activity. The Dyna-CLUE model was used to determine land-use allocation between 2008 and 2020 under two scenarios. Trend scenario was a continuation of recent land-use change (2002-2008), while the integrated land-use management scenario aimed to protect 45% of study area under intact forest, rehabilitated forest and reforestation for renewable energy. The maximum entropy model (Maxent), Geographic Information System (GIS) and FRAGSTATS package were used to predict bird occurrence and assess landscape fragmentation indices, respectively. The results revealed that parts of secondary growth, agriculture areas and dry dipterocarp forest close to road networks would be converted to other land use classes, especially eucalyptus plantation. Distance to dry evergreen forest, distance to secondary growth and distance to road were important factors for Black-crested Bulbul distribution because this species prefers to inhabit ecotones between dense forest and open woodland. The predicted for occurrence of Black-crested Bulbul in 2008 covers an area of 3,802 ha and relatively reduces to 3,342 ha in 2020 for trend scenario and to 3,627 ha for integrated-land use management scenario. However, intact habitats would be severely fragmented, which can be noticed by total habitat area, largest patch index and total core area indices, especially under the trend scenario. These consequences are likely to diminish the recreation and education values of the SERS to the public.

• Journal of Environmental Health Sciences
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• v.44 no.2
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• pp.188-195
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• 2018

Objectives: This study aimed to investigate the association between vitamin D deficiency and the risk of diabetes mellitus, and also examined whether their association is differed by sex and age. Methods: We analyzed the data from 28,135 subjects ${\geq}20years$ old who were registered for the Korea National Health and Nutrition Examination Survey (KNHANES) 2008-2014. Vitamin D was measured using serum 25-hydroxyvitamin D (25(OH)D) concentrations. Results: After adjusting for potential confounders (age, sex, education, income, total energy intake, smoking, physical activity, body mass index, and waist circumference), lower vitamin D was dose-dependently associated with a higher risk of diabetes mellitus (p-trend=0.004). When compared with the sufficient group (25(OH)D ${\geq}30ng/mL$), the severe deficient group (25(OH)D <10 ng/mL) had 1.46 (95% CI 1.11-1.94) odds ratio for the risk of diabetes mellitus. This association was markedly strong in men and adults aged ${\geq}40$, whereas no significant association was observed in women and adults aged <40. Conclusions: We found that vitamin D deficiency may be associated with an increased risk for diabetes mellitus in Korean adults. Our findings suggest that intake of higher vitamin D may help reduce the risk of diabetes mellitus.

• Journal of the Korean Society of Food Science and Nutrition
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• v.42 no.11
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• pp.1753-1758
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• 2013

A debate over the association between dietary patterns and obesity is not settled in the literature. Some studies suggest that there are significant differences in the mean body mass index (BMI) across dietary patterns, while others refute the result. Therefore, we extended this line of study to examine whether the influence of dietary pattern is strong enough to affect the incidence of obesity based on the criterion, BMI=25. We identified 3 dietary patterns using a cluster analysis of food intake data obtained from the food frequency survey conducted as a part of Korean genome epidemiologic study: 'variety', 'unrefined grain', and 'rice' dietary patterns. A Cox Hazard regression result showed that the all the dietary pattern variable parameters were not significant. Hence, it was concluded that the dietary patterns do not affect the incidence of obesity under the control of variables, such as age, energy intake, and etc.

• Korean Journal of Community Nutrition
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• v.10 no.1
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• pp.46-58
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• 2005

The purpose of this study was to compare the nutrition intakes and factors related to dietary behaviors according to age in female. The subjects included 579 females aged 15 - 59 years. This survey was conducted using a selfadministered questionnaire to obtain data about eating behaviors, living habits, eating disorders by EAT-26 (Eating Attitude Test-26), and nutrition knowledge. In younger women aged 15 - 20 years, the living habits related to health such as smoking, drinking and exercising were undesirable. In addition, the younger women group had significantly higher levels of skipping meals and frequency of eating snacks compared to the older women group and their eating times were not regular. And they showed a lower score of health eating index by mini dietary assessment (MDA). Although, all age groups consumed energy, Ca, Fe, and thiamin below the Korean RDA; especially, in adolescent, Ca intakes ($67.1\%$ RDA) were extremely low. In addition, mean score of EAT-26 was significantly higher in young women aged 15 - 29 years than older women. Also, they had rather lower levels of accuracy and perception for nutrition knowledge compared to older age group. These results suggested that Korean adolescent had undesirable nutritional intakes and attitude, and nutrition knowledge, indicating inadequate eating behaviors. These poor dietary behaviors can affect the health status. Therefore, the nutrition counseling and education to help people to have correct nutrition knowledge and to form better eating habits needs to be established.

• Korean Journal of Community Nutrition
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• v.10 no.5
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• pp.623-632
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• 2005

This study was intended to collect the baseline information on dietary behavior of adults to develop nutrition education program in the context of healthy weights at community level. Nutrient intakes of 128 housewives were assessed by 24 hour recall method. Also food habits, nutrition knowledge and attitude were investigated by self-administered questionnaires. Subjects were divided to under-weight, normal-weight, over-weight groups by body mass index (BMI). Most under-weight groups evaluated as their current body images were normal. $41\%$ of normal-weight groups judged as their current body images were obese. Energy and fat intakes of over-weight group were significantly higher than that of under-weight and normal weight groups (p<0.05). However, carbohydrate and protein intakes showed no significant differences among the three groups. It appeared that active attitude toward change in nutrition attitude of normal weight group was significantly higher than that of under-weight group (p<0.05). There were no significant differences of food habit score, nutrition knowledge, and obesity habit scores among the three groups. The frequency of eating-out showed significant difference among three groups (p<0.05). Food habit scores were positively related to health-concerned attitude (r=0.174), convenience-concerned attitude (r=0.229) and food enjoyed attitude (0.213) and negatively related to obesity habit score (r=-0.206). Also, positive correlation of body fat mass with frequency of eatingout (r=0.213), instant food (r=0.227) and amount of meal (r=0.187) existed (p<0.05). We concluded that nutrition education programs for housewives should include specific strategies to modify unsound food behaviors and inappropriate perception of body image for a healthy weight.

• Korean Journal of Community Nutrition
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• v.4 no.3
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• pp.394-402
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• 1999

The purpose of this study is to investigate diet quality and changes in nutrient and food intake with increase in age. Subjects were 69 patients(28 males, 41 females) living in Jeon-ju city, over middle-aged, and they were the same patients studied 4-7 years ago in a previous study. Dietary survey with one day 24-hour recall method was used. Energy, calcium, vitamin A and vitamin B$_2$intakes were lower than the RDA and vitamin C was in excessive status in pre-test and post-test. In food groups examrned, the consumption of potatoes, beans, vegetables, seaweeds, beverages, seasonings, oils, fish & shells and milks was increased amount than 4-7 years before but the consumption of cereals(p<0.01), sugars, seeds, fruits, processed food, meats and eggs was decreased. Diet quality was assessed by %RDA, nutrient adequacy ratio(NAR), mean adequacy ratio(MAR), dietary diversity score(DDS), meal balance and food group pattern. In %RDA, those proportion of appropriate intake in post-test in were higher than those in pre-test. For most nutrient except vitamin A, the levels of NAR in post-test were higher than in pretest. The MAR, an index of overall dietary quality, was 0.77 for pre-test and 0.83 for post-test(p<0.05). When we counted the major food groups consumed(KDDS), 62.3% of subjects had a KDDS of 3 in pre-test and 42.0% of subjects had a KDDS of 4 in post-test. Based on these results, in terms of variety and balance, total diet quality was improved with advancing of age.