• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.1
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• pp.159-167
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• 2001

The objective of this study is to examine the factors affecting bone mineral density in pre- and postmenopausal women. The subject were 30 Korean premenopausal women with mean ages of 33.6 years, and 30 Korean post menopausal women with mean ages of 63.3 years without diagnosed diseases. Data for food and nutrient intake were obtained by the24-hour recall method. BMD of lumbar spine and femoral neck were measured by the dual-energy X-ray absorptiometry (DEXA). Anthropometric measurement were made, and a blood sample was taken for assay osteocalcin. The results are summarized as follows: 16.67% of the subjects in the premenopausal women and 87.33% of the subjects in the postmenopausal women was less than the korean RDA level exceping phosphorus and vitamin C. In the premenopausal women, BMD of lumbar spine is correlated significantly with anthropometric measurement such as weight, waist circumference, BMI, and body fat mass BMD of femoral neck for the premenopausal women is correlated significantly with weight, BMI, waist circumference, body fat mass, hip circumference, and BMDs of both site are negatively correlated with lean body mass, total body water, but they are not related with intake of nutrients in this study. In the postmenopausal women group, BMDs of both site are not significantly correlated with anthropometric measurement, but BMD of lumbar spine showed positive relation with intake of energy, protein, and carbohydrate. In conclusion, adequate nutrient intake, especially energy, protein have been suggested to prevent the loss of bone mineral density in the postmenopausal women. Also, adequate body weight and BMI have been suggested in the premenopausal women.

• Journal of Nutrition and Health
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• v.15 no.4
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• pp.301-312
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• 1982

A series of growing and digestion trials was conducted using Sprague- Dawley weanling male rats in order to determine the effects of two protein sources (casein and ISP (isolated soyprotein) ), three protein levels (10, 20 and 30%), and two feeding patterns (ad libitum and meal feeding) on the growth, protein and energy metabolism, and body composition of rats. The total energy level of experimental diets was kept constant in 3,600 kcal ME /kg diet. The results were as follows : 1) The amount of food intake and the weight gain of meal-fed group were lower than those of ad libitum group. Though the intake of meal-fed group on 20 and 30% casein diet was only 85% of ad libitum group, it was able to gain as much as ad libitum group. 2) There were no significant differences in the food efficiency ratio (FER) and the energy efficiency (weight gain per 100 kcal GE intake) between ad libitum and meal feeding group. The FER and the energy efficiency of 20 and 30% casein diets of meal-fed group were greater than those of ad libitum group. 3) Though the gross energy intake (GE ), the digestible energy (DE) and the metabolizable energy (ME) tended to be lower at meal-fed group, the DE/GE and the ME/GE ratios for meal-fed group were the same as those for ad libitum. 4) Though meal- fed group fed less amount of nitrogen than ad libitum group, there were no differences in nitrogen balance and the retention of rats among the treatments. Actually meal-fed group retained more nitrogen than ad libitum group at the levels of 20 and 30% dietary protein. 5) After growing and digestion trials, the body composition of rats was constant among all treatments. Significantly high negative correlation coefficient (r = -0.77) was found between the body fat content and the body moisture content. Consequently, this study suggests that meal- fed group on 20 and 30% casein diets has shown more effective utilization of the ingested food and energy than ad libitum group, and increasing tendency of weight gain and the body fat deposition. Those influences of meal feeding pattern in rats were more effective on the casein diet than on the ISP diet.

• Journal of Nutrition and Health
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• v.51 no.3
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• pp.242-253
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• 2018

Purpose: The purpose of the study was to identify the nutrition knowledge, dietary attitudes of guardians, and nutritional status of infants and toddlers as well as the relationships between these variables. Methods: The participants were selected among applicants for low-income family financing provided by the government and included 115 infants and toddlers as well as their guardians. Demographic data, nutrition knowledge, dietary attitudes, and nutrition intakes were assessed using a self-administered questionnaire, biochemical examination, and 24 Hour-Recall method. Results: The score for guardians' nutrition knowledge was 12.97 points of a possible 15, and the score for dietary attitudes was 53.38 points of a possible 75. The nutrition knowledge and dietary attitudes showed significant differences by education level (p < 0.05) and family structure (p < 0.05). Energy intakes of subjects aged 6 ~ 24 months and over 25 months were lower than the DRI for Koreans. The intakes of carbohydrates, protein, and fat of subjects aged 6 ~ 24 months and over 25 months showed no significant differences by level of nutrition knowledge or dietary attitudes. The intake of Ca of subjects aged over 12 months showed significant differences by level of nutrition knowledge (p < 0.05). The intakes of Thiamin of subjects aged 6 ~ 11 months and P of subjects aged over 12 months showed significant differences by level of dietary attitudes (p < 0.05). There was a small positive correlation between education level and nutrition knowledge as well as between dietary attitudes. Nutrition knowledge showed a positive correlation with dietary attitudes. There was a positive correlation between nutrition knowledge and Ca, Riboflavin, as well as Vit C levels. Conclusion: Therefore, it is necessary to consider an educational program for increasing the practical application of knowledge to nutrition management for improvement of nutrition intake in infants and toddlers.

• Korean Journal of Community Nutrition
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• v.4 no.4
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• pp.529-538
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• 1999

It is very important to collect information on the nutritional status of the Korean population for the development of health promotion programs including nutrition. The purpose of this study was to assess the nutritional status of various population living in selected areas for model nutritional work. Seven hundred eighty households(30 households per each area)from 26 areas participated in this study from November 1 to November 20, 1996. Dietary intake data for two consecutive days were collected at household level by a weighting method. The mean energy intake of the subjects(1,934kcal) was higher than that resulted from the ‘95 Korean National Nutrition Survey(1,839kcal). The proportion of energy derived from cereals was 60.1%. The proportion of total protein intake from animal sources was 49.4%. These results were similar to those found in the ‘95 Korean National Nutrition Survey. Most nutrients(except iron, thiamin, riboflavin, vitamin C, and crude fiber) were higher than the result of the ‘95 Korean National Nutrition Survey. However, the average iron intake was about 68% of the result of ‘95 Korean National Nutrition Survey. This may be due to the adjustment of iron content in rice(3.7mg/100glongrightarrow0.5mg/100g) included in nutrient database for calculating nutrient intakes. The mean energy contribution from carbohydrate, protein, and fat were 64.2%, 16.4% and 19.4%, respectively. Significant differences of nutrient intakes were noted among some areas, which may be due to different food intake patterns according to the needs of the particular area. Therefore, the result of this study indicates that there are significant differences in food and nutrient intakes among the areas, suggesting that nutritional improvement programs may need to be developed differently by areas.

• Asian-Australasian Journal of Animal Sciences
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• v.18 no.8
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• pp.1164-1170
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• 2005

This study was conducted to evaluate performance, breast (thigh) muscle yield, nutrient digestibility and serum biochemical parameters of broilers fed low-protein diets supplemented with various threonine to lysine ratios (Thr/Lys). Three hundred and twenty four day-old male Arbor Acres broilers were randomly allotted to six dietary treatments with six replicates per treatment and nine broilers per replicate. Six treatments included one control diet [formulated according to NRC (1994)], and five experimental diets (treatments 1-5). In treatments 1-5, the crude protein level was 2% lower than that of the NRC control diet. The Thr/Lys in treatments 1-5 was 0.65, 0.70, 0.75, 0.80 and 0.85 during the starter and grower phases and 0.70, 0.75, 0.80, 0.85 and 0.90 during the finisher phase with other nutrient levels kept consistent. The results showed that: (1) With increasing Thr/Lys, ADG of treatments 1, 3 and 4 were lower (p<0.05) than those of the NRC control diet during the starter phase; ADG of treatments 1-5 were lower (p<0.05) than those of the NRC control during the grower phase, and ADG of treatment 1 was lower (p<0.05) than that of the NRC control during the finisher phase. Average daily feed intake in treatments 1 and 4 were lower (p<0.05) than that of broilers on the NRC control diet during the grower phase. Feed/gain (F/G) of the NRC control diet was lowest (p<0.05) during the starter phase. F/G in treatments 2 and 5 were higher (p<0.05) than that of NRC during the grower phase. (2) Breast muscle proportion on d 21 increased linearly (p<0.05) in response to graded levels of Thr/Lys. (3) No differences were detected for dry matter, energy and crude protein digestibility among all seven treatments. (4) On d 21, serum triglyceride of broilers on dietary treatments 3 and 5 was higher (p<0.05) than that of broilers in control. The results indicate that the low-protein diets supplemented with an appropriate Thr/Lys could not support the same performance that was achieved by the broilers fed the NRC control diet.

• The Korean Journal of Community Living Science
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• v.26 no.4
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• pp.661-673
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• 2015

This study examines the effects of a low-calorie raw juice diet on the level of serum ferritin in adults and analyzes nutrient intake from the diet. There were significant differences between juices; the highest calorie was provided by pear juice, highest crude protein, vitamin A, and vitamin B2 levels were from green Juice 1; and highest vitamin C and vitamin B1 levels were from fruit juices. The ratio of estimated energy requirements (EER) for the participants was 56.2% from the raw juice diet. The percentages of recommended intake (RI) from the raw juice diet of protein (57.9%), dietary fiber (19.1%), niacin (6.2%), calcium (0.1%), and magnesium (0.2%) were lower than 75%. However, those of RI of vitamin A, vitamin B1, vitamin B2, vitamin B6, and vitamin C were 1796.5%, 7481.7%, 1915.5%, 30858.7%, and 7500%, respectively, exceeding the tolerable upper intake level (UL) for vitamin A, vitamin B6, and vitamin C. There were significant decreases in weight, the body mass index (BMI), body fat mass, and skeletal muscle mass in males and females. After the diet program, serum iron and SOD (superoxide dismutase) showed significant decreases, whereas RBC, hemoglobin, hematocrit, and serum ferritin showed significant increases. There were negative correlations between serum ferritin and weight and between serum ferritin and skeletal muscle mass for all participants. There were negative correlations between serum ferritin and skeletal muscle mass for males and between serum ferritin and body fat mass for females. These results suggest that a raw juice diet can supplement a regular diet to prevent excess or deficient nutrient intake.

• Journal of the Korean Dietetic Association
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• v.17 no.4
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• pp.416-428
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• 2011

This study was carried out to investigate the effects of breakfast service on nutritional status, hematological status, and attentiveness of children in low-income families. The subjects were 19 boys and 13 girls between 7 and 11 years old. The subjects were divided into a control group and a breakfast service (BS) group, in which 12 boys and 5 girls received breakfast from February 1 to December 31, 2010. The results can be summarized as follows: intakes of energy, protein, carbohydrate, calcium, iron, zinc, vitamin A, vitamin $B_2$, niacin, and vitamin C in the BS group were significantly higher than those in the control group. In the BS group, the intakes of calcium, folic acid, and vitamin C were lower than 75% of recommended intake levels. There were no significant differences in the total blood protein level and total cholesterol level between the BS group and control group. A blood albumin level was significantly higher in the BS group than in the control group. Systolic blood pressure was higher in the BS group than in the control group, whereas the diastolic blood pressure showed no significant difference between the groups. A dietary attitude score increased according to breakfast service and nutritional education. No significant differences were found in the capacity value and continuity value between the two groups, but the control value was significantly higher in the BS group than in the control group. Therefore, to sustain the effect of breakfast service and improve nutritional status for children skipping breakfast in low-income families, nutrition intervention services, as well as legal and financial support by the government should be provided.

• Asian-Australasian Journal of Animal Sciences
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• v.22 no.5
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• pp.659-666
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• 2009

Metabolizable protein (MP) supply and amino acid balance in the intestine were manipulated through selection of highly digestible rumen-undegradable protein (RUP) sources and protected methionine (Met) supplementation. Four ruminallycannulated, multiparous Holstein cows averaging 193${\pm}$13 days in milk were used in a 4${\times}$4 Latin square design to assess N utilization and milk production responses to changes in RUP level, post-ruminal RUP digestibility and protected Met supplementation. Treatments were A) 14.0% crude protein (CP), 8.0% rumen degradable protein (RDP) and 6.0% RUP of low intestinal digestibility (HiRUP-LoDRUP); B) 14.1% CP, 8.1% RDP and 6.0% RUP of high intestinal digestibility (HiRUP-HiDRUP); C) 13.1% CP, 7.9% RDP and 5.2% RUP of high intestinal digestibility (LoRUP-HiDRUP), and D) 13.1% CP, 7.9% RDP and 5.2% RUP of high intestinal digestibility plus rumen escape sources of Met (LoRUP-HiDRUP+Met). Experimental diets were formulated to have similar concentrations of RDP, net energy of lactation ($NE_L$), neutral detergent fiber (NDF), acid detergent fiber (ADF), calcium, phosphorus and ether extract using the NRC model (2001). Results showed that dry matter intake (DMI), production of milk fat and protein were similar among treatments. Milk production was similar for diet HiRUP-LoDRUP, HiRUP-HiDRUP and LoRUP-HiDRUP+Met, and significantly higher than diet LoRUP-HiDRUP. Milk fat and protein percentage were higher for cows receiving HiDRUP treatments, with the greatest increases in the diet LoRUP-HiDRUP+Met. There was no significant change in ruminal pH, $NH_3g-N$ and volatile fatty acid (VFA) concentration among all treatments. Apparent digestibility of dry matter (DM), CP, NDF and ADF and estimated bacterial CP synthesis were similar for all treatments. Nitrogen intakes, blood and milk urea-N concentrations were significantly higher for cows receiving HiRUP diets. Urine volume and total urinary N excretion were significantly lowered by LoRUP diets. Lowering dietary RUP level while supplementing the highly digestible RUP source with rumen escape sources of Met resulted in similar milk production, maximal milk fat and protein concentration and maximum N efficiency, indicating that post-ruminal digestibility of RUP and amino acid balance in the small intestine can be more important than total RUP supplementation.

• Korean Journal of Community Nutrition
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• v.7 no.4
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• pp.484-494
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• 2002

This study was conducted to validate the semi-quantitative food frequency questionnaire that was developed to assess the intakes of fatty acids, as well as energy, carbohydrates, fat, protein, minerals and vitamins in Korean adults. The validity of the semi-quantitative food frequency questionnaire was tested on 78 subjects (31 men,47 women) aged 34 to 66 years. The semi-quantitative food frequency questionnaire included 93 food items and was validated on two 3-day dietary records. The mean intakes and the Spearman Correlation Coefficients between the semi-quantitative food frequency questionnaire and the two 3-day dietary records were analyzed for each nutrient and food group level. The mean nutrient intakes obtained from the semi-quantitative food frequency questionnaire were estimated to be greater than those of the two 3-day dietary records. The Spearman Correlation Coefficients between the energy-adjusted nutrient intakes from the semi-quantitative food frequency questionnaire and the two 3-day dietary records ranged from 0.24 for polyunsaturated fatty acids to 0.55 for fat in men and from 0.29 for polyunsaturated fatty acids to 0.55 for saturated fatty acids in women, respectively. The Spearman Correlation Coefficients for food intake ranged from 0.11 for teas and beverages to 0.58 for grains and their products in men,-0.04 for potatoes and starches to 0.73 for milk and dairy products in women. Foods consumed regularly had lower intra-person variation and tended to have higher observed correlation coefficients. These results indicate that the semi-quantitative food frequency questionnaire is a useful tool for estimating nutrient intakes, particularly of total fat and saturated fatty acid intakes.

• Journal of Nutrition and Health
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• v.37 no.10
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• pp.917-927
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• 2004

This study was performed to examine component of variance in nutrient intakes and to estimate the level of accuracy with varying degree of precision in order to achieve estimates of usual nutrient intakes. Three-day dietary records including both weekdays and weekends were collected every 4 season over a I-year period from 36 males and 93 females aged 40 - 65 y. For each nutrient, we partitioned total intake variance into weekly (weekday vs weekend), seasonal, within- and between- individual variation as components of variance, using analysis of variance. It was found that major components of variance were within- and between-individual variation. Particularly, within-individual variation (57.2 - 87.1 %) was greater than between-individual variation (12.2 - 37.4%) for all nutrients. Weekly and seasonal variation contributed small components of variance for most nutrients. For protein, fat and carbohydrate, there were a little significant weekly variation (0.00 - 1.35%) in females but not in males. For some micronutrients, there were moderately significant seasonal variation (0.15 - 5.48%) in both sexes. Ratio of within- to between- individual variation ranged 1.4 (vitamin B$_2$) -4.5 (vitamin B$_1$) in males and 1.6 (carbohydrate) -2.9 (fat) in females. With total 12-day dietary records data, the maximum percentage deviation of observed intakes from usual (true) intakes ranged 12-37%. To estimate usual individual intakes within 20% of the true mean with 90% confidence level, 3 - 9 days of dietary survey were required for energy, protein, carbohydrate, phosphorus and iron, 13 - 19 days for fat and calcium, 25 - 29 days for vitamin A and vitamin C. Correlation coefficients between observed and true nutrient intakes were 0.71 - 0.91 for males, 0.81-0.91 for females. In conclusion, mean intakes of several nutrients can be reliably measured with the record method, using a limited number of days. Both nutrients of interest and the primary objectives should be taken account when planning method of assessment and number of replicates.