• Korean Journal of Community Nutrition
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• v.28 no.6
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• pp.466-479
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• 2023

Objectives: A mobile health intervention program was provided for employees with overweight and obesity for 12 weeks, and a process evaluation was completed at the end of the program. We investigated participant engagement based on app usage data, and whether engagement was associated with the degree of satisfaction with the program. Methods: The program involved the use of a dietary coaching app and a wearable device for monitoring physical activity and body composition. A total of 235 employees participated in the program. App usage data were collected from a mobile platform, and a questionnaire survey on process evaluation and needs assessment was conducted during the post-test. Results: The engagement level of the participants decreased over time. Participants in their 40s, high school graduates or lower education, and manufacturing workers showed higher engagement than other age groups, college graduates, and office workers, respectively. The overall satisfaction score was 3.6 out of 5. When participants were categorized into three groups according to their engagement level, the upper group was more satisfied than the lower group. A total of 71.5% of participants answered that they wanted to rejoin or recommend the program, and 71.9% answered that the program was helpful in improving their dietary habits. The most helpful components in the program were diet records and a 1:1 chat with the dietary coach from the dietary coaching app. The barriers to improving dietary habits included company dinners, special occasions, lack of time, and eating out. The workplace dietary management programs were recognized as necessary with a need score of 3.9 out of 5. Conclusions: Participants were generally satisfied with the mobile health intervention program, particularly highly engaged participants. Feedback from a dietary coach was an important factor in increasing satisfaction.

• Korean Journal of Ichthyology
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• v.35 no.4
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• pp.325-332
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• 2023

The feeding habits of the Fat Greenling Hexagrammos otakii were studied using 376 specimens (17.4~41.4 cm in total length) collected off the Incheon coast, Korea between March 2020 and February 2021. H. otakii ate mainly gastropoda and teleostei, incuding caridea, brachyura, polychaeta, cephalopoda and amphipoda. The diet composition of H. otakii showed changes in season. H. otakii ate mainly cephalopoda in spring and ate mainly polychaeta in summer. The teleostei feeding rate was highest in autumn, whereas the proportion of gastropoda was higher in winter than in other seasons. The mean number of preys per stomach (mN/ST, One-way ANOVA, F=2.026, P>0.05) and mean weight of preys per stomach (mW/ST, One-way ANOVA, F=1.075, P>0.05) didn't show a statistically significant difference among size classes.

• Korean Journal of Poultry Science
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• v.37 no.4
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• pp.373-382
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• 2010

This study was carried out to investigate the effect of reverse osmosis (RO)-treated deep sea water (DSW) supplementation on the quality characteristics of chicken breast meat. For 28 days, one-day-old broiler chicks (Ross 308) were divided into two groups and supplemented with either water (control) or RO-treated DSW (diluted with deionized water at 1:20 [RO-treated DSW:deionized water] ratio). The control group was fed on a basal diet containing 0.21% salt. Five birds were slaughtered on each group and breast meat from carcasses was stored at $4^{\circ}C$ for 9 days. The proximate composition, fatty acid composition, cholesterol content, mineral content, pH value, water-holding capacity and Warner-Bratzler shear force value were not affected by RO-treated DSW supplementation. At 6 day of storage, lipid oxidation (2-thiobarbituric acid reactive substances) was significantly higher in RO-treated DSW group than in the control (P<0.05). With regard to meat color, CIE $L^*$ value was significantly lower in RO-treated DSW group than in the control after 6 day of storage (P<0.05), whereas CIE $a^*$ and $b^*$ values were not significantly different between two groups during storage. Consequently, RO-treated DSW supplementation led to a darker color and reduced the lipid oxidation stability in chicken meat during storage. Therefore, these results may indicate that RO-treated DSW can not be used as drinking water of chickens because it negatively affects the quality of chicken meat.

• Journal of Animal Science and Technology
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• v.50 no.5
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• pp.705-712
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• 2008

Sixteen multiparous lactating Holstein cows were used to compare effects of supplementing 1)no additive(Control), 2)1.2% sodium bicarbonate(NaHCO3); 3)niacin(80g/d), 4)vitamin A+E (140,000IU+1000IU) on feed intake, milk production, milk composition and somatic cell counts during the summer months. Insofar as possible, treatment groups were balanced for lactation number and days in milk. Cows were fed a diet of 9.1kg DM of concentrate and 10.2kg DM of corn silage. Daily maximum air temperature in free stall barn was 35℃ for 3 days of the pretreatment periods and decreased gradually up to 27℃ during the treatment periods of 15days. Dry matter intake of corn silage was higher(p<0.05) for cows consuming NaHCO3 than those not consuming NaHCO3. Daily milk production for niacin and vitamin A+E supplementations resulted in significant(p<0.001) increase in milk production from 3 day of trials than control and NaHCO3. Milk fat percentage tended(p=0.09) to increase and milk lactose percentage was increased significantly(p<0.001) for cows supplemented with NaHCO3, niacin and vitamin A+E. Milk protein percentages was higher significantly(p<0.05) with supplemental niacin and somatic cell counts was higher significantly(p<0.001) with supplemental vitamin A+E. These data strongly suggest that supplementation of NaHCO3, niacin or vitamin A+E should be increased for improving milk production and mammary gland health of dairy cows under heat stress.

• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.5
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• pp.715-722
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• 2003

This study is to investigate effects of green tea and capsulated components mixture on body fat and serum lipid composition and fat distribution in college women students in terms of supplemented periods. During 3 months of this research, 34 college women students (average age 20.3 yr) were selected as subjects. Nutrient intake was investigated by questionnaire and 24-hr recall method. Anthropolatric assessments of the subjects were investigated by SBIA method (Segmental Bioimpedance Assay, Inbody 3.0). The results were as follows: mean body height was 162.5cm and mean body weight and mean BMI (Body Mass Index, kg/$m^2$) were 57.9kg and 21.9, respectively. Status of carbohydrate intake decreased significantly (p<0.05) and dietary fiber intake increased significantly (p<0.001) after supplementation. WHR (waist-hip ratio) decreased significantly (p<0.05) and body fat and percent body fat decreased significantly after supplementation (p<0.05). Total cholesterol and triglyceride decreased significantly after supplementation (p<0.001). Above results of this study show that green tea, silk peptide and dietary fiber supplementation-added routine diet improves body fat distribution, total cholesterol, triglyceride. Especially, declination of abdominal fat and WHR was notable, since that means diminution of risk factors for obesity and chronic degenerative diseases.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.26 no.2
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• pp.141-149
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• 1993

The seasonal variation of lipid content was mostly attributed to diet, water temperature and period of reproduction etc. The lipid mainly consisted of neutral lipid and phospholipid. Nonpolar lipid content was higher in between late spring and summer, while polar lipid content lower during the period. The composition of neutral, glyco, and phospholipid of the total lipid: in average was 53.88, 10.09 and $36.03\%$, respectively. The neutral lipids were composed of triglycride($51.88\%$) and free sterol($23.21\%$) as major component and a little quantity of diglycerides, monoglycerides, esterified sterols and hydrocarbon, free fatty acid were also identified. The phospholipids of each fraction were mainly occupied by phosphatidyl choline($55.5\%$), followed by phosphatidyl ethanolamine($27.8\%$), phosphatidyl inositol($8.65\%$) and phosphatidyl serine($4.85\%$). The major fatty acids of the total lipid in ascidian were $C_{20:5},\;C_{22:6},\;C_{16:6}\;and\;C_{18:1}$, respectively. The fatty acid composition of phospholipid and neutral lipid showed a similar tendency to that of the total lipid. The major fatty acids in the fraction of glycolipid, however, appeared $C_{16:0},\;C_{20:1},\;C_{18:0}\;and\;C_{18:1}$ in order.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.6
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• pp.986-992
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• 1996

This study was designed to observe the effects of the feeding Platycodon grandiflorum(6 or 22 years) extract on the improvement of the blood glucose, lipids in the serum and liver of alloxaninduced hyperglycemic rats(S.D. strain, ♂), alloxan monohydrate 15mg/kg B.W./day I.P. injection) for 3 weeks. Concentrations of blood glucose were significantly higher in the alloxan administration(I.P.) groups(groups 2, 3 and 4) than those in the control group(group 1, basal diet). Blood glucose concentrations were remarkably lower in the group 3(basa1+alloxan+6years Platycodon grandiflorum) and 4(basa1+alloxan+22years Platycodon grandiflorum) than those in the group 2(basal+alloxan), and particularly, lower in the group 4. Concentrations of total cholesterol and LDL-cholesterol in serum were significantly lower in the groups 3, 4 than those in the group 2, and remarkably, lower in the group 4 than those in the group 3. Concentrations of HDL-cholesterol in serum were tile highest in the group 1. Those in the groups 3 and 4 were higher than those in the group 2. Atherosclerotic index were lower in the group 3, 4 than those in the group 2. In the alloxan-induced diabetic groups(groups 2, 3, 4), the serum free cholesterol, cholesterol ester, triglyceride and phospholipid concentrations were significantly lower in the group 3, 4 than those in the group 2. Contents of total cholesterol, triglyceride and phospholipid in liver were remarkably lower in the all experimental groups than those in the group 2. The activities of aspartate aminotransferase, alanine aminotransferase and lactate dehydrogenase In serum were the highest in the group 2, but the other groups were rather lower. From the above research, the Platycodon grandiflorum(6 or 22 years) extracts were effective on the improvement of the blood glucose, lipid compositions in serum and liver. And particularly, Platycodon grandiflorum(22 years) was more effective than those in the Platycodon grandiflorum(6 years).

• Journal of the Korean Society of Food Science and Nutrition
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• v.11 no.1
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• pp.57-68
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• 1982

In order to investigate the effect of dietary protein and energy on growing female and male rats, Sprague-Dawley 90 female rats and 54 male rats of 3 weeks old weighing approximately 70-80g and 65-75g, respectively, were subjected to feeding trials for 8 weeks and then subsquently to metabolic trials for 2 weeks. Three dietary energy levels (3200, 3600, 4000 kcal ME/kg) were employed and each energy level contained three protein levels (15, 25, 35% of 3600 kcal ME/kg) and three fat levels (10, 20, 40% of 3600 kcal ME/kg) by addition of an appropriate amount of carbohydrate and the following results were obtained. The body weight gain of female rats was highest for LPHE ration but that of male rats was highest for LPME ration. The weight gains both of female and male rats were not affected by the level of protein. Food efficiencies both of female and male rats was affected by the level of protein, whereas that of male rats was not. Protein efficiencies of female and male rats were highest at low protein level and tended to decrease as the level of protein increased, but that of female rats was highest at high energy level, while that of male rats was highest at medium energy level. The analysis of the body composition after feeding trials for 8 weeks has shown that the contents of body water and protein were not affected by protein level both in female and male rats. The content of body fat increased remarkably as the protein and energy levels increased in case of female rats, but it was not affected by the protein and energy levels in case of male rats. From the above-mentioned experimental results it may be con eluded that the best formula of diet of growing female rats may be composed of low protein (13%) and high energy levels (4000 kcal/kg) whereas that for male rats may be composed of low protein (13%) and medium energy levels (3600 kcal/kg), since all the efficiencies of food, protein and energy have shown to be best at these levels.

• Korean Journal of Poultry Science
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• v.31 no.3
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• pp.165-170
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• 2004

The objective of this study was to evaluate the carcass and meat quality of broiler chicken when slaughtered after treating with different source of grain(T1, 100% corn; T2, 50% corn + 50% brown rice; T3, 100% brown rice) in broiler diet. The carcass weight was decreased when feeding level of rice increased. The yield of breast was higher in T2(18.6%) than T1(17.3%) and T3(l7.9%). The L values(L *) and b values(b*) in meat color were decreased as the feeding level of rice increased when compared to T1(P < 0.05). Warner-Bratzler shear force(WBS) values were higher in T2 and T3 compared to T1. Cooking loss(%) was increased for T2(23.49%) and T3(24.50%) compared to T1(22.90%). In fatty acid composition, linoleic acid(C18:2, n6) contents were significantly lower in T2(31.89%) and T3(27.89%) when compared to TI(33.21%)(P < 0.05), and the total contents of unsaturated fatty acids(UFA) were 76.85%(T1), 77.22%(T2), or 75.49%(T3). The ratio of n6/n3 was decreased as the level of rice increased in the feed(T1 19.89%, T2 17.73%, and T3 17.01%). In conclusion, the meat quality was not significantly different between T1 and T2 from the results of carcass weight, meat color, WBS, and fatty acid composition; therefore, brown rice can be substituted for 50% of corn in the broiler diets.

• Food Science of Animal Resources
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• v.25 no.2
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• pp.175-188
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• 2005

This study investigated the effects of silkworm droppings (SWD) added diet feeding on quality characteristics of pork loin meat Pigs were divided into 7 treatment groups (10 pigs/group) and subjected to one of seven treatment diets $(0,\;1\%,\;2\%\;and\; 3\%\;SWD\;for\;4 weeks,\;1\%\;2\%\;3\%$ SWD for 8 weeks, SWD diets; total fed diets) before slaughter. Pork loin were collected from the animals (110kg body weight) slaughtered at a commercial slaughterhouse. Pork loin meat were packaged aerobically and then stored at $4^{\circ}C$ for 2, 5, 8, or 12 days. Samples were analyzed for general composition, texture characteristics and physico-chemical properties. pH value was not significantly different between the control and SWD treatment groups. pH of control and SWD treatment groups were increased as the storage period passed General composition, cooking loss and texture was not significantly different between the control and SWD treatment groups. WHC of SWD treatment group was higher than that of control group. WHC of control and SWD treatment groups were significantly decreased as the storage period passed (p<0.05). Meat and fat color (CIE $L^{\ast}$, $a^{\ast}$, $b^{\ast}$) were no significant differences between the control and SWD treatment groups. $L^{\ast}$ and $b^{\ast}$ value of meat color were decreased as the storage period passed There was a not significantly difference in shear force value among control and SWD treatment groups. Shear force value was decreased significantly during storage in all treatment groups. In all results, dietary SWD-supplementation was not affected in general components, texture characteristics and physico-chemical properties. It is suggested that dietary SWD-supplementation could produce of high quality pork.