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Sukyoung Jung 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
There is increasing interest in examining the contribution of ultra-processed foods (UPFs) to individuals’ diets and the health impact of UPFs. A growing body of evidence indicated that higher UPF consumption is associated with an increased risk of diverse health outcomes. As evidence is emerging, efforts to shift towards limiting UPF consumption have become a relevant and timely topic. In general, observational epidemiologic studies, especially prospective cohort studies, have merit in unraveling the association between dietary intake and health outcomes and food frequency questionnaires (FFQs) have been administered as the most practical method in large-scale epidemiological settings since the 1990s. However, concerns related to the use of the FFQ in UPF classification are raised, especially in Korea where main diets consist of many dishes with combinations of individual ingredients and seasoning. While UPF consumption in Korea gradually increased, however, very limited study on UPF consumption and disease risk is available to date. Thus, this presentation will show the performance of the FFQ to classify UPF consumption of individuals’ diets compared to the 24 HR. We suggest that the FFQ in the Korea National Health and Nutrition Examination Survey (KNHANES) can be an acceptable tool for UPF classification and it is needed to be limited to the purpose of relative comparisons using quantile categorization. This would provide new insights for future use of the FFQ in large-cohort studies that only measure dietary intake with FFQs.
Jung Sukyoung,Park Sohyun 한국역학회 2022 Epidemiology and Health Vol.44 No.-
OBJECTIVES: Different approaches for analyzing repeated dietary measurements may yield differences in the magnitude and interpretation of findings. We aimed to compare 3 dietary measurements (baseline, most recent, and cumulative average) in terms of the association between plant-based diet indices (PDIs) and incident abdominal obesity in Korean adults aged 40-69 years. METHODS: This study included 6,054 participants (54% women) free of abdominal obesity (defined as waist circumference ≥ 90 cm for men and ≥ 85 cm for women) at baseline. As exposures, baseline, most recent, and cumulative average measurements for PDI, healthy-PDI (hPDI), and unhealthy-PDI (uPDI) were created. A Cox proportional-hazard model was used to estimate the hazard ratios (HRs) for abdominal obesity. RESULTS: During 45,818 person-years of follow-up (median, 9 years), we identified 1,778 incident cases of abdominal obesity. In the multivariable-adjusted analysis, a higher uPDI was associated with a higher risk of abdominal obesity in both total and stratified analyses. The findings were consistent across all approaches (Q5 vs. Q1: HRbaseline= 1.70; 95% confidence interval [CI], 1.46 to 1.98; HRmost recent= 1.52; 95% CI, 1.30 to 1.78; HRcumulative average= 1.76; 95% CI, 1.51 to 2.06 in the total set). PDI showed no meaningful association with abdominal obesity risk in any analyses. hPDIaverage had a suggestive inverse association with abdominal obesity risk in men, and hPDIbaseline had a positive association with abdominal obesity risk in women. CONCLUSIONS: Greater adherence to unhealthy plant-based diets may increase the risk of developing abdominal obesity in Korean adults. The findings were generally consistent across all approaches.
건설폐기물, 생활폐기물의 용출특성 분석과 BMP test를 통한 최종메탄(CH<SUB>4</SUB>) 및 황화수소(H<SUB>2</SUB>S) 수율 산정
정석영(Jung, Sukyoung),정성엽(Jeong, Seongyeob),장순웅(Chang, Soonwoong) 한국신재생에너지학회 2014 신재생에너지 Vol.10 No.1
The main object of this study was to offer information about incoming waste in landfill and to evaluate biochemical methane and hydrogen sulfide potentials of landfill wastes. We examined brick, soil, mixed waste (C&D waste and MSW) samples for the study. The leaching experiments showed that BOD, COD and sulfate were determined in the range of 0~18,816 mg/kg, 85~21,100 mg/kg and 160~1,205 mg/kg, respectively in 6hr extraction test. An accumulated extraction tests for 140day were determined BOD 226~197,219 mg/kg, COD 436~242,588 mg/kg and Sulfate 1,090~25,140 mg/kg. Also, BMP (biochemical methane potential) tests were carried out to examine methane and hydrogen sulfide yields for the 3 different wastes. As a result, methane yield was determined to 262.68 mL CH₄/g VS of MSW and 0~17.75 mL CH₄/g VS in brick, soil and C&D waste. Higher hydrogen sulfide yield was observed to 0.079mL H₂S/g VS in C&D waste. This result indicate that brick and soil could be sources of sulfate, and higher production of hydrogen sulfide could be odor problem and inhibitor of methane production.
음식점 종사자들의 근무역할에 따른 건강행태와 건강수준 차이
정수경(Sukyoung Jung),김서림(Seorim Kim),송은희(Eunhi Song),황택근(Taik Gun Hwang),박소현(Sohyun Park) 한국식품영양과학회 2018 한국식품영양과학회지 Vol.47 No.8
이 연구는 서울의 한 지역에서 음식점에 근무하는 영업주와 종업원의 건강행태와 건강수준을 조사하였다. 대상자를 영업주와 종업원으로 나누어 분석하였을 때 하루 평균 업무시간은 영업주 9.1시간, 종업원 10.2시간으로 큰 차이를 보이지 않았고, 성별을 층화하여 분석한 결과 역시 유사하게 나타났다. 주 40시간 이상 근무하는 비율은 영업주와 종업원 간 큰 차이를 보이지 않았으나, 휴일을 갖는 비율은 영업주 76.5%, 종업원 93.9%로 종업원에서 높은 경향을 보였다. 하루 평균 수면시간은 영업주 7.2시간, 종업원 7.5시간으로 비슷했다. 정신적 건강수준 분석 결과 영업주의 91.2%, 종업원의 81.8%가 스트레스를 느낀다고 응답하였고, 영업주의 17.7%, 종업원의 3.0%가 우울감을 느낀다고 응답하였다. 영업주와 종업원의 만성질환 유병률과 식행동, 음주행태, 흡연행태의 차이는 통계적인 유의성을 넘지는 않았다. 그렇지만 성별과 연령을 보정한 만성질환 유병률이 모든 지표에서 영업주가 높게 나온 것과 우울감, 스트레스, 수면시간 등의 차이가 영업주에서 더 높게 나타난 것은 향후 더 많은 참여자를 대상으로 추가 분석의 필요성을 보여준다. This study was conducted to evaluate health behaviors and indicators among restaurant personnel and to compare the health indicators based on work roles (restaurant owners and employees). Survey questionnaires were administered to examine respondents daily schedules such as working time, rest and sleeping time, as well as health behaviors such as dietary behaviors, drinking and smoking habits. In addition to the survey, we conducted a health examination to collect anthropometric data and analyze the prevalence of chronic diseases. A total of 67 workers in one district in Seoul, South Korea participated in the study. The results showed that the average working hours per day was 9.1 hours for owners and 10.2 hours for employees. The proportion of employees who worked more than 40 hours a week did not differ significantly between employees and owners. However, 76.5% of owners had a full day off vs. 93.9% of employees. Additionally, 91.2% of owners and 81.8% of employees responded that they felt stress, while 17.7% of owners and 3.0% of employees felt depressed. There were no significant differences in the prevalence of chronic diseases, dietary habits, drinking behaviors, and smoking behaviors between owners and employees; however, the prevalence of all indicators was consistently higher among restaurant owners. Despite the lack of significance among major health indicators because of the small sample size, it is important to further examine the reasons for the less desirable health behaviors and health indicators among restaurant owners after adjusting for age and gender.
Sarang Jeong(Sarang Jeong),Hajoung Lee(Hajoung Lee),Sukyoung Jung(Sukyoung Jung),Jee Young Kim(Jee Young Kim),Sohyun Park(Sohyun Park) 한국역학회 2023 Epidemiology and Health Vol.45 No.-
OBJECTIVES: Chrono-nutrition emphasizes meal timing in preventing obesity and metabolic disorders. This study explores the impact of temporal dietary patterns (TDPs) on obesity and metabolic syndrome (MetS) in Korean adults aged 20 years to 65 years. METHODS: We utilized dynamic time warping method and Kernel k-means clustering to investigate diet quality and the odds ratios (ORs) of obesity and MetS with different TDPs using data from the 7th Korea National Health and Nutrition Examination Survey. RESULTS: Participants were divided into three groups based on relative energy intake over 24 hours. After adjusting for age and gender, Cluster 3 (with the highest proportion of energy intake in the evening) had the lowest Healthy Eating Index scores compared to other clusters. Following adjustment for key covariates, Cluster 3 showed the highest values for body mass index, waist circumference, blood pressure, total cholesterol, and triglycerides. Compared to Cluster 1 (with a lower proportion of energy intake in the evening), Cluster 2 and Cluster 3 had ORs for obesity of 1.12 (95% confidence interval [CI], 0.97 to 1.30) and 1.19 (95% CI, 1.03 to 1.37), respectively. For MetS, the ORs were 1.26 (95% CI, 1.08 to 1.48) and 1.37 (95% CI, 1.17 to 1.61) when comparing Cluster 2 and Cluster 3 to Cluster 1. CONCLUSIONS: This study reveals that individuals with higher energy intake in the evening have increased odds of obesity and MetS, even after adjusting for major covariates, including age and total energy intake.
EFFECTS OF LARGE-SCALE ENVIRONMENT ON THE ASSEMBLY HISTORY OF CENTRAL GALAXIES
Jung, Intae,Lee, Jaehyun,Yi, Sukyoung K. IOP Publishing 2014 The Astrophysical journal Vol.794 No.1
<P>We examine whether large-scale environment affects the mass assembly history of central galaxies. To facilitate this, we constructed dark matter halo merger trees from a cosmological N-body simulation and calculated the formation and evolution of galaxies using a semi-analytic method. We confirm earlier results that smaller halos show a notable difference in formation time with a mild dependence on large-scale environment. However, using a semi-analytic model, we found that on average the growth rate of the stellar mass of central galaxies is largely insensitive to large-scale environment. Although our results show that the star formation rate (SFR) and the stellar mass of central galaxies in smaller halos are slightly affected by the assembly bias of halos, those galaxies are faint and the difference in the SFR is minute, therefore it is challenging to detect it in real galaxies given the current observational accuracy. Future galaxy surveys, such as the BigBOSS experiment and the Large Synoptic Survey Telescope, which are expected to provide observational data for fainter objects, will provide a chance to test our model predictions.</P>