Effect of Dietary Protein Source on the Protein and Cholesterol Metabolism in Adult Young Men

본 연구는 식이중 단백질 급원을 콩단백, 콩단백+난백, 쇠고기로 달리하였을때 단백질의 종류가 인체내 단백질 대사와 혈청 콜레스테롤 함량에 미치는 영향을 알아보고자 하였다. 연령 만18세부터 22세까지의 건강한 남자대학생 8명을 대상으로 제 1 실험, 제 2 실험, 제 3실험기간동안 각각 textured soy protein diet, toxtured soy protein + egg white diet, beef diet를 각각 6일씩 섭취시켰다. 각 실험기간동안 질소보유량 및 보유율측정을 위해서 뇨와 변을 채취하였으며 혈액성분 중 hemoglobin, hematocrit, serum total protein, serum albumin, blood urea nitrogen (BUN) 및 plasma amino acid측정과 혈청 cholesterol측정을 위해서 혈액을 채취하였다. 변 중의 질소배설량은 콩단백군이 다소 많아서 단백질의 소화 · 흡수율이 가장 낮은 경향을 보였으나 세군간에 유의적인 차이는 질소 보유량 및 질소 보유율도 단백질의 종류에 따른 유의적인 차이는 나타나지 않았다. Hemoglobin과 hematocrit, 혈청의 총단백질 함량은 단백질 종류에 따른 유의적인 차이를 나타내지 않았다. 혈청의 albumin함량은 실험군간에 통계적으로 유의성 있는 차이를 보이기는 했지만 모두 정상범위에 속했다. BUN의 함량은 쇠고기를 섭취하였을 때가 콩단백+난백을 섭취하였을 때보다 유의적으로 높게 나타났다. 혈청의 콜레스테롤 함량은 쇠고기를 섭취하였을 때가 콩단백 또는 콩단백+난백을 섭취하였을 때 보다 유의적으로 낮은 경향을 보였다. 혈장의 유리아미노산 함량은 alanine과 lysin의 경우에만 단백질 급원에 따른 유의적인 차이를 보여 alanine함량은 쇠고기를 섭취하였을 때가 콩단백 또는 콩단백+난백을 섭취하였을 때보다 높은 경향을 보였고 lysine함량 역시 콩단백을 섭취하였을 때 보다 쇠고기를 섭취하였을 때 높게 나타났다. 이상의 결과를 종합해 보면 대두단백질이 성인의 단백 영양에 동물성 단백질에 비해 뒤떨어지지 않음을 알 수 있었고 혈청 콜레스테롤 농도를 증가시킨 결과를 보였다.;This study was performed to investigate the effects of the dietary protein source on protein metabolism and serum cholesterol concentration in adult young men. Eight healthy male college students aged from 18 to 22 were fed with textured soy protein (TSP) diet, textured soy protein + egg white (TSP+EW) diet or beef diet for 6 days during each period of experiment IP experiment 2 or experiment 3. The results of this study were summarized as following. The nitrogen content of feces was a Little higher in TSP group than the other two groups and protein digestibility was tended to be the lowest of all, but there was no significant difference among three groups. The nitrogen balance was not significantly different among three groups. Hemoglobin concentration, hematocrit and serum total protein concentration were not significantly different among three groups. The serum albumin concentration, was significantly different among groups, but all were in normal ranges. Blood urea nitrogen concentration was significantly higher in beef group than in TSP group or TSP+EW group. The serum cholesterol concentration was significantly lower in beef group than in TSP group or TSP+EW group. Plasma concentractions of alanine and lysine were significantly different among three groups while the other amino acid concentrations were not, i.e. the concentration of alanine was significantly higher in beef group than in TSP group or TSP+EW group and the concentration of lysine was significantly higher in beef group than in TSP group. Thus it was concluded that the dietary protein source did have any effect of protein metabolism in this study but texured soy protein showed hypercholesterolemic effect.목차 = ⅲ 논문개요 = ⅷ Ⅰ. 서론 = 1 Ⅱ. 실험 재료 = 3 A. 실험대상 및 기간 = 3 B. 실험식이 = 4 Ⅲ. 실험방법 = 7 A. 식이섭취량 = 7 B. 체중·신장 = 7 C. 식품, 뇨, 변, 혈액의 채취 및 분석 = 7 1. 시료의 채취 = 7 2. 분석 = 9 D. 단백질의 소화·흡수율 = 11 E. 체내 질소보유량 및 보유율 = 11 1. 체내 질소보유량 = 11 2. 체내 질소보유율 = 12 F. 자료의 처리 및 분석 = 12 Ⅳ. 실험결과 = 13 A. 식이섭취와 체중의 변화 = 13 B. 단백질의 소화흡수율 = 13 C. 질소섭취량과 뇨와 변중의 질소 배설량 및 체내 질소 보유량·보유율 = 14 D. 혈색소량, 적혈구 용적비 = 15 E. 혈청의 총 단백질, Albumin, BUN = 15 1. 총단백질 함량 = 16 2. 혈청 albumin함량 = 16 3. 혈액중의 요소 질소함량 = 16 F. 혈청의 총콜레스테롤 함량 = 16 G. 혈장의 유리아미노산 함량 = 17 Ⅴ. 고찰 및 결론 = 19 참고문헌 = 26 ABSTRACT = 3

A Numerical Study for Effects of Air-Sea Interaction on the snowstorm over the west coast of Korea using Coupled Model

This study aims to examine the favorable conditions for rapid developing mesocyclone in a snowstorm across the Yellow Sea over the southwestern coast of Korea on 4 December 2005, using a coupled model with a Coupled Ocean/Atmosphere Mesoscale Prediction System as the atmospheric component and the Regional Ocean Modeling System as the oceanic component. The air-sea coupling results in important structural modifications for the amount of snowfall. A decrease in the SST during the development of the mesocyclone causes an increase in the maximum snowfall amount near its center. We can conclude that another mechanism of enhanced snowfall is found in addition to upward motion. The increased ascending motion allows a more upward transport of low-level moisture and then a more intense convective activity and more snowfall2

Improvement of Forecasted Sea Surface Wind Initialized with Cycling 3DVAR-WRF

A cycling three-dimensional variational data assimilation (3DVAR) method based on the WRF is developed to assimilate surface and upper-air meteorological observations. A cycling 3DVAR scheme with 6-h assimilation window is designed and employed to generate the initial conditions for this sea surface wind forecasting. The result shows that the forecasted sea surface wind improved compared to the result without cycling 3DVAR. Although the impacts of assimilating the observations on near-surface wind forecasts are limited, the fine structure of local weather systems illustrated by the WRF-cycling 3DVAR system suggests that assimilating the observations has a positive effect on the near-surface wind forecast under conditions that the observations in the initial condition are properly amplified. Assimilating conventional data is an effective approach for improving the forecast of the near-surface wind.oyed to generate the initial conditions for this sea surface wind forecasting. The result shows that the forecasted sea surface wind improved compared to the result without cycling 3DVAR. Although the impacts of assimilating the observations on near-surface wind forecasts are limited, the fine structure of local weather systems illustrated by the WRF-cycling 3DVAR system suggests that assimilating the observations has a positive effect on the near-surface wind forecast under conditions that the observations in the initial condition are properly amplified. Assimilating conventional data is an effective approach for improving the forecast of the near-surface wind.1

A Coupled Model Study on Formation and Dissipation of Advection Fog

The effect of variations in SST on the formation and duration of advection fog event was investigated by carrying out numerical experiments for an advection fog event using a mesoscale coupled model and an uncoupled atmospheric model. Enhanced cooling of the air in the boundary layer over a cooler ocean surface increases the condensation of advected moist air and strengthens the stable stratification. Stable stratification causes a decrease in sea surface wind speed and restricts the downward mixing of drier air2

Effects of Air-Sea Interaction on the formation and evolution of Sea Fog

Advection and steam fogs over the Yellow Sea are examined with the goal of better understanding its formation and persistence using the mesoscale coupled atmosphere/ocean model. The decrease in the wind speed results in a weakening of turbulence and wind stress. The weakened wind stress limits a decrease of turbulent mixing in the ocean, which increases the SST. The effect of air-sea interaction changes or maintains the atmospheric stability by the variability of air-sea temperature difference and wind speed, which determines the duration and dissipation time of sea fog.2