• 대한지역사회영양학회지
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• 제13권1호
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• pp.100-110
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• 2008

Recently, a lot of epidemiological studies revealed that low HDL-cholesterol level was a better predictor of risk for coronary heart disease than total cholesterol. This study investigated the anthropometric parameters, clinical blood indices, and dietary factors influencing serum HDL-cholesterol level by using a cross-sectional study for Korean female college students. The subjects were 94 female college students. They were divided into three groups according to their serum HDL-cholesterol levels, low HDL-cholesterol (<50 mg/dL, n=20), medium HDL-cholesterol (50 $\leq$, < 60 mg/dL, n=39) high serum HDL-cholesterol groups (60 $\leq$ mg/dL, n = 35). This study examined their demographic data and dietary intake throughout a questionnaire. Clinical blood indices were measured using an automatic blood chemistry analyzer (Selectra E), after 12 hours of fasting. BMI, body weight, fat mass, and waist circumferences were significantly increased according to low serum HDL-cholesterol levels. Serum lipid analysis showed a significantly higher level of TG, LDL-/HDL-Ratio, atherogenic index in the low HDL-cholesterol group. Serum levels of GPT, uric acid and alkaline phosphatase in the low HDL-cholesterol group were significantly higher than in the other group. The average consumption of energy was 1627 kcal and 77.76% of estimated energy requirement (EER). The mean ratio of calories from carbohydrate: protein: fat was 57:15:28. The low HDL-cholesterol group was significantly higher than the other groups in eggs, fat and oils consumption. Interestingly, milk and diary products consumption of low HDL-cholesterol group was half (p < 0.05) of those of the other groups. In conclusion, serum HDL-cholesterol levels appeared to be decreased by increasing BMI, fat mass, waist circumference, and serum TG level. In addition, some dietary factors seemed to be related to serum HDL-cholesterol levels. However, further research is needed to elucidate the exact relationship between serum HDL-cholesterol level and dietary factors.

• 대한임상검사과학회지
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• 제36권1호
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• pp.49-54
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• 2004

The purpose of this study was to investigate the effects of Lycii fructus extract on the serum lipids in hyperlipemia rats. The rats were divided five groups including negative control, positive control and treated L. fructus extract at dose of 50, 100, 200 mg/kg. To induce the hyperlipemia, 4 groups of rats, not including the negative control group, were fed experimental diets consisting of cholesterol, lard, corn oil, and normal diet for experiment period. As a result, the L. fructus extract decreased total cholesterol(T. Cho), trigryceride(TG), low density lipoprotein cholesterol(LDL-C), and free fatty acid(FFA) significantly compared with positive control. However, no significant difference was found in high density lipoprotein(HDL-C) and phospholipid(PPL) level. Otherwise, in serum lipid level including, T-Cho, TG, LDL-C, FFA and PPL was decreased dose dependently by treatment of L. fructus extract. But HDL-C was increased by L. fructus extract too. Thereby having beneficial effect on hyperlipermia by influencing the serum lipid change, it is expected that Lycii fructus extract can suppress arteriosclerosis and obesity.

• 대한한의학회지
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• 제29권5호
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• pp.52-66
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• 2008

Objectives :Ginkgo-Chunghyul-dan (GCHD) is newly developed herbal medicine to prevent and treat stroke. In this study, we investigated whether the GCHD had antioxidant activity and anti-platelet aggregation effect in vitro and hypolipidemic activities in vivo. Methods :Anti-oxidant activity of GCHD was measured using the Blois method, anti-platelet effect of GCHD was assessed by the Born method, and hypolipidemic activities of GCHD were evaluated in corn oil- or Triton WR-1339-induced and cholesterol-fed rats. Results :GCHD showed anti-oxidant activity in the study inhibiting the formation of 1-diphenyl-2-picrylhydrazyl radicals and xanthine oxidase activity. GCHD had anti-platelet aggregation activity. GCHD significantly lowered total cholesterol (TC), triglyceride (TG), and low density lipoprotein cholesterol (LDL-C) in high cholesterol diet and Triton WR-1339 induced model TG in corn oil-induced model. GCHD had no acute toxicity at a single dosage. Conclusion : These results suggest that GCHD has the potential to treat hyperlipidemia and stroke.

• Journal of Korean Biological Nursing Science
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• 제22권1호
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• pp.11-22
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• 2020

Purpose: The purpose of this study was to evaluate the effect of aerobic exercise on serum lipids, body weight, and body mass index in adults with hypertension using a systematic review and meta-analysis. Methods: Six electronic databases (PubMed, EMBASE, Co-chrane library, CINAHL, PsycINFO, SPORTDiscus) and five domestic databases were searched for randomized controlled trials studies. We used random effect models to derive weighted mean differences (WMD) and their 95% confidence intervals (CI) of aerobic exercise on serum lipids, body weight, and body mass index. Results: Nineteen studies met our inclusion criteria. In comparison with the control group, triglyceride level (TG) (-13.49 mg/dL, 95% CI: -26.74 to -0.24) and body weight (-0.62 kg, 95% CI: -1.08 to -0.16) difference between follow-up and baseline was significantly reduced in the aerobic exercise group. However, no difference was found in total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and body mass index (BMI). Conclusion: Aerobic exercise is effective in reducing the TG level and body weight in adults with hypertension. In order to improve levels of serum TC, LDL-C and HDL-C of hypertensive patients, it's needed to combine other intervention methods such as diet therapy.

• 동아시아식생활학회지
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• 제6권1호
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• pp.59-68
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• 1996

The present study undertaken to investigate the interrelationship among their regular dietary fatty acid intake, body fat content(BFC), and plasma lipid fractions(PLF) of middle-aged Korean women. Forty-nine women (age 30 to 49) participated in this study in which the aim was to determine their total nutrient intake per day, BFC and PLF, and to analyse the intercorrelations of these. Strong correlation was seen among their body mass index, mid-upper-arm-circumference, and BFC which were positively correlated with plasma total lipids(TL) and triglycerides(TG). Dietary myristic acid and lauric acid were positively correlated with both total cholesterol(TC) and LDL-cholesterol (LDL-C) in plasma. Palmitic acid, stearic acid, oleic acid, and total monounsaturated fatty acid(MUFA) were negatively correlated with HDL-cholesterol(HDL-C). Although dietary total saturated fatty acid (SFA) was not correlated with TC and LDL-C, it was positively correlated with TL and TG in plasma. However, dieary n-3 polyunsaturated fatty acid(PUFA) in regular Korean diet was not correlated with any of lipid fractions in plasma which might be due to the high ratio of n-6/n-3 in their diet. From the above results, it was concluded that plasma lipid fractions were modulated by their dietary nutrients, especially the types of the fatty acids. Dietary SFA and MUFA intake not PUFA are strongly correlated with LDL-C and HDL-C in the Korean diet This may relate to the frequency of coronary heart disease in the age group.

• 한국ITS학회 논문지
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• 제13권2호
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• pp.1-11
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• 2014

본 논문의 목적은 DSRC 기반 통행속도 이력데이터를 활용하여 IC-IC 구간 단위의 통행패턴을 도출하는 것이며, 이를 통해 방대한 이력정보 데이터의 활용도를 높이고, 단순하지만 정확성 높은 방법으로 도로의 통행패턴을 용이하게 파악할 수 있게 하는 것이다. 통행패턴 분류는 의사결정나무 기법을 적용하였고, 월 시간대 구간 단위로 분리된 통행패턴을 생성하여 시 공간이 변화되어도 이에 대응 가능하도록 하였다. 경부고속도로 서울TG~안성IC 구간을 대상으로 의사결정나무 기법을 적용한 결과, 요일 기준으로 (월)(화 수 목)(금)(토)(일) 5개 그룹으로 고정 통행패턴이 분류되었다. 분류 결과를 영동, 중부, 중부내륙 고속도로의 9개 구간에 적용하여 통계적 검증을 수행한 결과 약 93%의 적합도를 갖는 것으로 나타났다. 의사결정나무를 통한 통행패턴 오차를 개선하기 위하여 4개의 추가변수를 도입한 결과, "직전월의 소통상황"을 설명변수로 추가할 경우 통행속도 분산이 약 50% 감소함을 확인하였고, 실제 상황에 적용할 경우 소통 원활 시의 오차가 약 4% 감소되었다.

• 대한화학회지
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• 제55권4호
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• pp.644-649
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• 2011

Polyaniline/$SiO_2$ 촉매를 이용하여, acetophenone, aromatic aldehydes와 aromatic amines을 에탄올 용매 속에서 반응시켜서 다양한 various ${\beta}$-amino ketones을 one-pot mannich 반응을 수행하였으며, 이 반응을 위해 silica가 충진된 여러 가지 종류의 wt% polyaniline을 화학적인 산화방법에 의해 합성하였다. 합성한 촉매는 thermal analysis(TG-DTA), X-ray diffraction (XRD), scanning electron microscopy(SEM) energy dispersive spectroscopy(EDS), 및 Fourier transform infrared spectroscopy (FT-IR) 방법으로 확인하였으며, 촉매의 용매에 대한 안정도 UV-Visible spectroscopy로 측정하였다. Polyaniline/$SiO_2$ 촉매를 이용하는 합성 방법은높은 수율로 얻어지며, work up이 쉽고, 독성이 없으며, 쉽게 회수하여 재사용이 가능하다.

• 자원리싸이클링
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• 제3권3호
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• pp.21-26
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• 1994

국내에서 산출되고 있는 반토혈암으로부터 고순도 $\alpha-Al_2O_3$를 얻기 위하여 황산암모늄을 사용한 염배소와 황산을 이용한 추출 그리고 하소 실험을 하였다. 황산의 농도, 반응시간, 온도 등이 알루미나 추출에 미치는 영향에 대하여 조사하였으며, 반응산물은 X-ray, DTA-TG, 화학분석, SEM 등으로 분석하였다. 추출조건은 전처리 조건으로 황산암모늄의 농도가 0.6M, 배소온도가 $650^{\circ}C$였으며, 황산추출은 황산농도 10%로 240분간 추출할 경우 96%의 수율을 나타내었다. 생성된 $Al_2O_3$ 분말을 X-ray 분석한 결과 $\alpha-Al_2O_3$였으며 그 순도는 99.23%였다.

• Journal of Nutrition and Health
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• 제30권4호
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• pp.386-393
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• 1997

This experiment was performed to investigate the effect of different dietary lipids on the risk factors of coronary vascular disease(CVD) in ovariectomized rats. female rats of Sprague-Dawley stram were divided into sham-operated(sham) and ovariectomized(ovx) groups and then each group was divided into a beef fallow group, a soy bean oil group and a fish oil group. After 16 weeks of feeding on experimental diets, animals were sacrificed and blood, liver, kidney and perirenal fat pad were obtained. Food intake and weight gain of fish oil group were significantly lower than other dietary lipid groups. food intake and weight gain tended to be higher in ovx groups than in sham groups. The weight Index(g/100g body weight) of liver and kidney was higher in the fish oil group than the other groups and weight index was lower in ovx groups compared to sham groups. The weight of the perirenal fat pad was the highest in the beef tallow group and the lowest in the fish oil group. The fish oil group showed the lowest total cholesterol(TC) and triglyceride (TG) levels in serum. Serum TG levels were lower in all ovx groups than in sham groups, but serum TC levels were not influenced by ovariectomy. fatty acid composition of serum reflects the recent dietary Intake of fat. Linoleic acid content was tile highest in soy bean oil group and eicosapentaenoic acid(EPA) and docosahexaenoic acid(DHA) contents were the highest in fish oil group. fatty acid composition of adipose tissue, especially EPA and DHA contents in perirenal fat pad, was highest in the fish oil group. Saturated fatty acid(SFA) and monounsaturated fatty acid(MUFA) in serum and adipose tissue did not reflect fatty acid intake. The activities of glucose-6-phosphate dehydrogenase, a lipogenic enzyme, in the blood of the beef tallow and soybean oil groups showed the tendency to be high and that of the fish oil group to be low in ovx. Carnitine acetyltransferase, a lipolytic enzyme, showed the highest activity in the liver of the fish oil group and was least active in the soy bean oil group.

• 한국추진공학회지
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• 제22권2호
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• pp.29-37
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• 2018

5 N 급 단일추진제 추력기를 이용하여 ADN 기반 고성능 친환경 단일추진제의 연소 시험을 수행했다. ADN 기반 추진제 및 촉매의 제작을 진행했으며, DSC-TG 분석을 통한 검증을 진행했다. 연소 시험 시 촉매 반응기 내에서 작은 규모의 연소 불안정 현상이 발생했지만, 촉매 반응기 전단에서의 높은 온도를 관찰하여 제작된 추진제의 촉매 연소가 발생했음을 파악했다. 향후 보다 높은 열적 안정성을 확보하기 위해 추진제의 높은 단열 분해 온도를 견딜 수 있는 촉매의 개발을 수행하고 이를 적용할 예정이다.