This study was conducted to improve growth performance of Hanwoo heifer and to produce high quality of meat with dietary means during growing and early fattening period. Particularly, additional energy diet to relieve estrus stress was main purpose in this study. The results of in vitro rumen fermentation indicated that there was no negative effect by additional energy diet as treatments. In the feeding trial, twenty Hanwoo heifers(average 10 months age) were allocated and distributed into two treatments in randomized block design based on body weight. There were three growth stages such as growing, early fattening and late fattening periods in this feeding program, respectively. In growing stage, there were two treatments consisting of only total mixed ration(TMR) as a control and TMR with additional energy treatment. The experimental diets were fed twice a day, and water and mineral were freely accessed. In additional energy treatment, 500 g of concentrate diet was fed daily to relieve estrus stress due to obese with high energy intake. Not outstandingly differences were found across the treatments during entiretrial period. While, unexpectedly greater feed conversion ratio in treatment compared to the control was found during late fattening period. It seems that the blood cortisol decreased with addition energy supplementation compared with the control during trail period. Carcass characteristics including carcass weight, back fat thickness, marbling score, meat color, fat color, maturity and texture were not significantly different each other. Rib-eye area, however, was greater in the control compared to the treatment(p<0.05). In addition, it appears that yield index was tended to be greater in the control. In conclusion, it is suggested that additional energy supplementation to Hanwoo heifer could get a potential in improving meat quality and relieving estrus stress.

The purpose of this study was to investigate the dietary habits of smokers and non-smokers among a few male university students residing in Changwon-si and factors that affect their smoking behavior. A self-administered questionnaire was conducted for a duration of one month in June 2015 (n=367). The results of this study showed that the breakfast skipping rate of the smoking group was significantly higher compared to the non-smoking group (p<0.001), and the smoking rate was significantly higher among those with more serious smoking problems (p<0.001). Compared to the non-smoking group, the smoking group showed significantly higher BMI (body mass index) (p<0.05) and demonstrated significant drinking habit of more liquid type yogurt among milk and dairy products and significantly more coffee mixes among fat, oils, and sugars (p<0.05). The results of multiple regression analysis showed the necessity to prepare smoking systems in school (t=－2.87, p<0.05), encumbrances to studies due to smoking (t=－3.59, p<0.001), and variables that affect smoking such as the number of close friends who smoke (t=4.17, p<0.001), BMI (t=3.08, p<0.05), and the level of problematic drinking (t=3.67, p<0.001). The results of this study suggest factors that must be considered in establishing smoking prevention education programs, anti-smoking policies, and strategies for university students.

본 연구는 열 스트레스 (heat stress, HS)에 노출된 브로일러에서 혼합 생균제의 급여가 혈 액 생체지표, 면역반응, 맹장 미생물 및 생산성에 미치는 영향을 조사하였다. 총 400마리의 브로일러 수 컷 (Ross 308)을 각각 100마리씩 4그룹, C (대조군, 실온 25℃), HS (열 스트레스 33℃), HSP (HS플 러스 혼합 생균제 500, 750 mg/kg) 그룹으로 배치하였다. 브로일러의 증체량, 사료섭취, 사료요구율 및 면역기관 무게는 HSP 그룹에서 HS 그룹과 비교했을 때 증가하였다. 혈액 IgG, lymphocytes 농도는 HS 그룹에서 HSP그룹과 비교했을 때 증가하였고, heterophil과 lymphocyte(H:L)비율, 코르티코스테론 농도 및 폐사율은 낮았다. 맹장의 Lactobacillus는 HS 그룹과 비교했을 때 HSP 그룹에서 증가하였으나 Escherichia coli (E. coli), coliform bacteria, aerobic bacteria는 낮아졌다. 본 연구결과는 열 스트레스 에 노출된 브로일러에게 B. subtilis, S. galilaeus 및 Sphingobacteriaceae등 3가지 균주가 포함된 혼합 생균제를 급여해주면 면역반응 증진, 미생물 균형을 유지해줌으로써 폐사율을 낮추고 생산성을 개선할 수 있음을 시사해준다.

본 연구는 열 스트레스 (heat stress, HS)에 노출된 산란계에서 혼합 생균제의 급여가 생산성, 계란품질, 면역반응, 맹장 미생물 및 분 암모니아에 미치는 효과를 조사하였다. 총 400마리의 50주령 Hy-Line brown 산란계를 무작위로 각각 100마리씩 4 그룹, C (대조군, 실온 25℃), HS (열 스트레스 33℃), HSP (HS 플러스 혼합 생균제 500, 750 mg/kg)로 배치하였다. 산란계의 생산성, 계란품질, 비장 무게, 혈액 IgG 및 lymphocyte 농도는 HSP 그룹에서 HS 그룹과 비교했을 때 증가하였고, 코르티코스테론, heterophil과 lymphocyte의 비율 (H:L) 및 폐사율은 유의하게 낮았다. Lactobacillus는 HSP 그룹에서 HS 그룹과 비교했을 때 증가하였으나 Escherichiacoli (E. coli), coliform bacteria 및 aerobic bacteria는 유의하게 낮았다. 분에서 암모니아 발생은 HS 그룹이 HSP 그룹에 비해서 유의하게 증가하였다. 결론적으로, 이러한 혼합 생균제가 여름철 산란계의 더위 피해를 방해주고 면역반응, 맹장 미생물 균형을 경유하여 생산성, 계란품질 및 계분으로부터 악취 발생을 줄이는 데 효율적인 영양전략이 될 수 있음을 나타낸다.

본 연구에서는 소비자의 식생활 라이프 스타일 유형에 따른 가축질병 인식(우려도)에 대한 결정요인을 분석하였다. 우선 식생활 라이프 스타일과 관련된 23개의 문항들을 이용하여 요인분석을 실시하고, 요인들의 평균값을 기준으로 군집분석을 실시하였다. 또한, 소비자들의 유형적 특성을 규명하기 위해, 인구 사회경제적 요인 및 식생활 관련 특성을 활용하여 교차분석 및 로짓분석을 실시하였다. 분석결과 가축질병이 국내에서 발생하거나 해외에서 감염 환자가 발생하는 등 사회적 이슈가 되었을 때, 소비자들의 불안감은 소비에 부정적으로 작용할 가능성이 높은 것으로 나타났다. 따라서 가축질병에 대한 소비자의 필요 이상의 불안감은 효율적으로 완화시킬 필요가 있으며 이를 위해 효율적인 리스크 커뮤니케이션을 전개가 필요한 것으로 판단된다.

Metabolic syndrome is a risk factor for cardiovascular and type 2 diabetes. This study was conducted to examine the relevance between nutrition intake, meal quality, and high-sensitivity C-reactive protein in Koreans with metabolic syndrome. The 2,536 subjects, aged 19~64, who participated in 2015 National Nutrition Survey were included in this study. The 24-hour recall method was employed to analyze nutrition intake and dietary quality. Subjects were grouped into either the non-metabolic syndrome group (n=1,938) or the metabolic syndrome group (n=598). Total males and females were divided into 3 groups according to the high-sensitivity C-reactive protein (hs-CRP) level to study its relationship to metabolic syndrome and its components, including odds ratio (OR) and confidence interval (CI). Results showed the homeostasis model assessment of insulin resistance (HOMA-IR) value was higher in the metabolic syndrome group (3.37) than non-metabolic syndrome group (1.57) (p<0.001). In the Index of Nutrition Quality, males in the non-metabolic syndrome group showed higher niacin (p<0.05) than males in metabolic syndrome group. Females in the non-metabolic syndrome group had higher vitamin B1 (p<0.01), vitamin B2 (p<0.001), niacin (p<0.05), calcium (p<0.001), and phosphate (p<0.01). Female in the high hs-CRP group showed high OR in blood glucose component (OR 2.488, 95% CI: 1.269~4.879) and metabolic syndrome risk (OR 2.856, 95% CI: 1.292~6.314). Females in the middle hs-CRP group had high triglycerides component (OR 2.956, 95% CI: 1.920~4.551), compared to the low hs-CRP group. The study showed females with higher hs-CRP had a higher risk of metabolic syndrome.

The purpose of this study was to evaluate the nutritional knowledge and dietary behaviors of middle school students according to their mother’s employment status. Of all 453 subjects, 52.1% were boys, and 67.5% of the mothers were employed. The total score of nutritional knowledge was 8.0 out of 10 for students with a non-working mom and 7.7 for those with a working mom, showing no significant difference. Among the 20 nutritional knowledge questions, correct answer rates for “lots of fruits may be eaten because of not gaining weight” (72.6% vs. 81.6%, p<0.05) and “eating raw carrots is better than eating fried ones with oil” (34.6% vs. 44.9%, p<0.05) were significantly higher in students with a working mom. The regularity of meals showed a significant difference according to the mother’s employment, indicating that responses of “very regular” (62.4% vs. 72.1%) were high among students with a non-working mom and responses of “skipping breakfast” (31.4% vs. 19.7%) were higher in students with a working mom (p<0.05). The number of snacks a day was also significantly different according to the mother’s employment, showing that 12.8% of the students with a working mom and only 3.4% of them with a non-working mom did not eat snacks at all (p<0.05). These results reveal no significant difference in middle school students’ nutritional knowledge according to their mother’s employment status; however, the students whose mother had a job were more likely to have more undesirable dietary behaviors such as irregular meals and snacking.

The purpose of this study was to investigate dietary habits, health lifestyle, preference and intake of beverages of Chinese students in Gyeonggi area. Therefore, we try to identify the factors that affect beverage consumption. According to the analysis of the demographic characteristics of male and female Chinese students, there were 155 male students (49.7%) and 157 female students (50.3%). There were statistically significant differences between the residence period and the time of coming to Korea according to sex (p<0.05), but there was no statistically significant difference between the education level, residence type and Korean ability (p>0.05). Analysis of the differences in health-related lifestyle among Chinese students of both sexes showed statistically significant difference in alcohol drinking, smoking, and exercise according to sex (p<0.05), but no statistically significant difference in computer use time (p>0.05). According to the analysis of the dietary habits of the Chinese students, there was a statistically significant difference in the number of meals per day, breakfast, lunch, dinner, snack frequency and number of midnight snacks, but no statistically significant difference in eating out frequency. As a result of the preference test for general beverages, 4.11 points of water, 3.81 points of milk, 3.64 points of fruit and vegetable juice, 3.58 points of tea, 3.25 points of coffee, 3.22 points of carbonated drinks, 2.92 points of functional drinks, respectively. Male students were more likely to prefer water, tea, and health functional drinks while female students had higher preference for fruit, vegetable juice and vinegar drinks (p<0.05). In general, consumption of regular drinks was 4.95 in water, 3.58 in milk, 3.03 in coffee, 2.92 in carbonated drink, 2.91 in fruit and vegetable juice, 2.63 in tea, 2.07 in functional drink, and 1.44 in vinegar appear. Male students had higher intake of water, tea, carbonated drinks, and health functional drinks while female students had higher intake of fruit and vegetable juice (p<0.05). The results of correlation analysis of factors affecting the general drinking of Chinese students are as follows. The intake of tea was related to the period of residence and dietary habits, the intake of milk for breakfast, the number of snacks and midnight snacks for carbonated drinks, and the fruit vegetable juice were related to dietary habits (p<0.01, p<0.05). Key words: Chinese students, dietary habits, life habits, preference and intake of beverages

This study was conducted to determine the elements that are required and that need improvement in the contents of dietary life education and the educational environment by analyzing the importance-satisfaction of a dietary life education program for dietary life education trainees. The results of the rank test for the satisfactory elements of dietary life education were in the order of competence of instructors, educational contents, time of education, educational environment and affordability of tuition. The importance-satisfaction analysis of the contents and construction of the dietary life education program showed that “suitable contents for the theme of the class”, “contents and construction of practice class”, “diversity of practice menu” and “diversity of educational contents” had high importance and satisfaction scores and therefore, could be maintained at their current levels. Meanwhile, “adequacy of class time” and “contents and construction of theory class” showed low importance and satisfaction scores, requiring a little effort. Whereas, “time and construction of group practice”, “structure of textbook for class” and “duration of course and number of classes” showed relatively low satisfaction compared to importance, requiring major efforts for improvement. Similarly, analysis of the lecture element from dietary life education showed that “professional lecture by instructors”, “lectures suitable for themes” and “lecture applicable in real life” had relatively low satisfaction compared to importance, requiring major efforts for improvement. In addition, analysis of the educational environment from dietary life education showed that “adequacy of lecture room space”, “cooking equipment”, “diversity of cooking utensils” and “sanitary condition of cooking utensils” also require major efforts for improvement. Therefore, dietary life education should not be executed with a simple delivery of knowledge but with both theory and practice classes to increase its application in real life, and active and specific efforts are required to nurture professional instructors and establish educational strategies.

The objective of this study was to investigate the effect of dietary education on undergraduate student’s health, environment, and consideration. A total of 54 participants were recruited from an undergraduate student in Seoul. We conductive quantitative analysis of a structured questionnaire and qualitative analysis of interviews recorded by photovoice. There are significant differences among knowledge, dietary attitude, and food behavior in the field of health (p<0.001). In the field of health, photovoice data were categorized as ‘health care practice’, ‘Korean dietary lifestyles’, or ‘awareness of importance of health’ (p<0.001). In the field of environment, photovoice data were categorized as ‘environment-friendly dietary lifestyle’ and ‘environmental contamination minimization’(p<0.001). In the field of consideration, photovoice data were categorized as ‘gratitude for others’, ‘joy of cooking’or ‘eating meals together’(p<0.01). In conclusion, we found that dietary education about health, environment, and consideration may affect healthy dietary lifestyle among undergraduate students. Our findings may warrant further studies to develop significantly effective dietary education for undergraduate students.

본 연구는 육계에 Hematococcus pluvialis(H. pluvialis)의 급여가 성장 및 혈액 성상에 미치는 효과를 확인하기 위해 수행되었다. 2주령의 육계 120수를 기초사료 급여구(대조구)와 H. pluvialis 건조분말을 0.05(HP 0.05), 0.1(HP 0.1) 및 0.2%(HP 0.2)로 사료에 혼합하여 급여한 3개의 처리구로 나누어 5주 동안 사양시험을 실시하였다. 시험 종료시점에, HP 0.2의 증체량은 대조구와 비교하여 통계적으로 유의성 있게 증가하였으며(p<0.05), 사료요구율도 대조구와 비교하여 통계적으로 유의성 있게 개선되었다(p<0.05). 혈액학적 지표들의 경우, 모든 H. pluvialis 건조분말 처리구와 대조구 사이에 유의적인 차이를 보이지 않았다. 혈액생화학적 지표들의 경우, HP 0.2의 aspartate aminotransferase 값이 대조구와 비교하여 통계적으로 유의성 있게 감소하였다(p<0.05). 본 연구의 결과를 통해, H. pluvialis 건조분말을 사료 톤 당 2.0kg 농도(0.2%)로 육계사료에 첨가하여 급여할 경우에 육계의 성장 및 사료요구율의 개선 효과가 있는 것으로 확인되었다.

Despite the rapid increase in the number of foreign students, there has been a lack of research to help them adapt to Korean food culture and develop healthy eating habits. This study examined the dietary habits and problems of foreign students studying in universities of Korea. Although 97.0% of the 604 people surveyed live in dormitories, the visiting rate of the school cafeteria was low. In addition, only 30.2% of them ate three meals a day, and the frequency of eating midnight snack and convenience store foods was high. International students were positive about experiencing new Korean food, but food satisfaction in Korea was not high because of the difficulties in food selection due to religious problems and maladjustment to Korean sauces and seasonings. Information on Korean eating habits was obtained mainly from other foreign students from the same country (49.5%) and the Internet (33.8%), and there was very little interaction with Korean students at meals. The ratio of subjects who ate halal foods was 33.3%, and they were shown to have difficulty obtaining halal foods in Korea. Therefore, based on the results of this study, a support program should be developed in order to improve the dietary habits of international students.

본 연구는 산란후기 사료에 뽕잎의 수준별 첨가 급여가 산란계의 생산성, 계란품질 및 혈액성상에 미치는 영향을 구명하고자 시행하였다. 74주령 하이라인 브라운 산란계 360수를 4개처리 5반복 반복당 18수씩 배치하여 12주간 사양실험을 실시하였다. 처리구는 ME 2750kcal/kg, CP 15%인 기초사료에 뽕 잎분말을 0, 0.2, 0.4 및 0.8% 수준으로 첨가 급여하였다. 산란율과 난중은 매일, 사료섭취량과 계란품 질은 4주 단위로 조사하였고, 혈액성상과 난황지방산은 사양실험종료 후 채취하여 측정하였다. 전체 사양실험기간에서 산란율과 1일 산란량은 뽕잎 첨가구에서 증가하는 경향을 보였지만 처리구간에 통계적 차이는 없었고, 난중, 사료섭취량 및 1일산란량도 유의적 차이는 없었다. 사료요구율은 실험 전기간 뽕 잎첨가구에서 개선되는 경향이 있었으며, 특히 82~85주령에서는 통계적 차이를 확인하였다(p<0.05). 난백높이, 호유닛, 난각강도 및 두께는 처리구간 차이가 없었다. 불포화지방산은 뽕잎의 첨가수준에 따 라 현저하게 증가하였지만(p<0.05), 포화지방산은 감소되었다(p<0.05). 혈청 HDL 콜레스테롤은 0.4% 첨가수준에서 현저하게 증가하였고(p<0.05), 중성지방은 뽕잎 급여수준에 따라 매우 감소하는 경향을 보였다. 그러므로 본 연구결과는 뽕잎의 첨가급여가 산란후기 산란계의 생산성, 계란품질 및 강건성을 개선하는데 효과적인 것을 시사한다.