• 대한임상검사과학회지
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• 제39권1호
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• pp.37-41
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• 2007

This study was carried out to investigate the cadmium level in blood by age, gender, and smoking status among 162 elderly subjects in Gyeongnam Province from September 2006 to February 2007. The cadmium level in blood was analyzed by atomic absorption spectrophotometer. Subjects were classified according to smoking status and divided into smokers and non-smokers, smoking duration, daily smoking habits, age, and gender. Mean blood cadmium levels in male and female were $0.70{\pm}0.41{\mu}g/dL$ and $0.57{\pm}0.32{\mu}g/dL$ respectively, with no significant differences between the two groups. Cadmium levels in the blood of smokers and non-smokers were $0.57{\pm}0.32{\mu}g/dL$, $0.90{\pm}0.44{\mu}g/dL$ respectively, with the cadmium level of smokers being significantly higher than that of non-smokers. In comparison by age, cadmium levels in the blood of subjects over the age 70 years and over the age 80 years were $0.91{\pm}0.44{\mu}g/dL$, $1.02{\pm}0.39{\mu}g/dL$ respectively, showing a significantly higher blood cadmium level than that of non-smokers. when compared by the amount of daily cigarette consumption, there were no significant differences in the blood cadmium level between groups. However when compared by smoking duration, the blood cadmium level for the group of smoking duration of over 10 years was $1.15{\pm}0.38{\mu}g/dL$, significantly higher than $0.67{\pm}0.31{\mu}g/dL$ for the group of smoking duration of less than 10 years. In conclusion, longer smoking duration and older aged group showed higher cadmium level in blood. For more reliable results, further study of the elements that elevate the cadmium level in blood with more subjects and study variables will be needed.

• 동의신경정신과학회지
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• 제14권1호
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• pp.183-192
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• 2003

Objective : Obesity is related to psychological problems as well as physical problems. This study was designed to investigate the depression of over weight and normal group who visited to obesity clinic for diet therapy. Methods : 67 patients were selected(obesity group 42, normal group 25), they were treated medically in obesity clinic of Dong-Seo Oriental Hospital. We checked age, sex, education level, relative weight, BMI and Beck Depression Inventory(BDI) in two group. Results : The results were summarized as followed. 1. The ratio of Relative Weights are $137.45{\pm}12.77$ in over weight group, $108.48{\pm}9.11$ in normal group. 2. The ratio of BMI are $28.61{\pm}2.94$ in over weight group, $23.04{\pm}1.83$ in normal group. 3. The results of BDI score are $10.60{\pm}7.15$ in over weight group, $12.56{\pm}8.33$ in normal group. Conclusions : These results suggested that the patients who participated in diet therapy had mild depression and we should pay attention to psycological problem as well as the physical problem when we treat obesity.

• 환경영향평가
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• 제19권1호
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• pp.59-74
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• 2010

The trend of the PM10 concentrations in the Seoul Metropolitan Area (SMA) is reviewed and relative contributions of major contributors (paved road emissions and long-range transport from outside the SMA) are discussed. It was shown that the PM10 concentrations in the SMA have generally decreased except Incheon between 1999 and 2005. Further, it was identified that the difference of the PM10 mass concentration between the roadside stations and urban ambient stations has decreased between 2004 and 2008. Based on the emission estimates, it was suggested that the reduction of resuspension of aerosols on the road is the major reason for that. Based on the modeling results, it was identified that outside effects be about 30% of the ambient PM10 concentration in the SMA. Further research and policy issues to identify major sources of PM10 in the SMA are discussed.

• Environmental Engineering Research
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• 제20권3호
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• pp.260-267
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• 2015

The $PM_{10}$, $SO_2$ and $NO_2$ mass concentrations were obtained over five years from monitoring stations across Nanchong, a southwest city in China. Changes in urban air quality over time, as well as the factors influencing that change, were evaluated based on air pollutant concentrations, the Air Pollution Index (API), and the Comprehensive Pollution Index (P). The results showed that the total annual mean $PM_{10}$, $SO_2$ and $NO_2$ concentrations over the five years studied were $61.1{\pm}1.1$, $45.0{\pm}3.9$ and $34.9{\pm}4.9{\mu}g{\cdot}m^{-3}$, respectively. The annual mean concentrations displayed a generally decreasing trend; lower than the annual mean second-level air quality limit. Meanwhile, the annual mean API values were in a small range of 52-53, the air quality levels were grade II, and P values were 1.06-1.21 less than the slight level ($P{\leq}1.31$). Total monthly mean $PM_{10}$, $SO_2$, $NO_2$ concentrations, and API and P values were consistently higher in winter and spring than during autumn and summer. The results of a correlation analysis showed that temperature and pressure were the major meteorological factors influencing pollution levels. Pollution sources included industrial coal and straw burning, automobiles exhaust and road dust, fireworks, and dust storms.

• 한국대기환경학회지
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• 제32권1호
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• pp.82-99
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• 2016

This study was carried out to understand the regional contribution of Particulate Matter (PM) emissions from East Asia ($82^{\circ}{\sim}149^{\circ}E$, $18^{\circ}{\sim}53^{\circ}N$) to Seoul during high concentration period in February 2014. The Community Multi-scale Air Quality (CMAQ) version 5.0.2 with Decoupled Direct Method (DDM) was used to analyze levels of contributions over Seoul. In order to validate model performance of the CMAQ, predicted PM and its chemical species concentrations were compared to observations in China and Seoul. Model predictions could depict the daily and hourly variations of observed PM. The calculated PM concentrations, however, had a tendency of underestimation. The discrepancies are due to uncertainties of meteorological data, emission inventories and CMAQ model itself. The high PM concentration in Seoul was induced by stationary anticyclone over the West Coast of Korea during 24 to 27 February. The DDM in CMAQ was used to analyze the contributions of emissions from East Asia on Seoul during this PM episode. $PM_{10}$ concentration in Seoul is contributed by 39.77%~53.19% from China industrial and urban region, 15.37%~37.10% from South Korea, and 9.03%~18.05% North Korea. These indicate that $PM_{10}$ concentrations in Seoul during the episode period are dominated by long-range transport from China region as well as domestic sources. It was also found that the largest contribution region in China were Shandong peninsula during the PM event period.

• Journal of Pharmaceutical Investigation
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• 제38권1호
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• pp.73-78
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• 2008

To evaluate the bioequivalence of two ramipril formulations, a standard 2-way randomized cross-over study was conducted in twenty-six healthy male Korean volunteers. A single oral dose of 10 mg of test formulation $Ramiprin^{(R)}$ (tablet) or reference formulation Tritace $Protect^{(R)}$ (tablet) was administered with one-week washout period. Plasma concentrations of ramipril were assayed over a period of 12 hr with a well validated method using liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The values of area under the plasma concentration-time curve, from time zero to last sampling time $(AUC_t)$ and from time zero to time infinity $(AUC_{inf})$ were $77.45{\pm}44.78\;and\;78.96{\pm}45.64$ for test, and $70.30{\pm}42.27\;and\;71.99{\pm}43.55ng\;hr/mL$ for reference formulation, respectively. Similarly, maximum concentration $(C_{max})$ and elimination half-life $(t_{1/2})$ were $65.61{\pm}19.96ng/mL$ and $2.15{\pm}0.75hr$ for test, and $63.63{\pm}25.50ng/mL$ and $2.16{\pm}0.73hr$ for reference formulations, respectively. Time to reach maximum concentration $(T_{max})$ for the test and the reference, were $0.51{\pm}0.22hr\;and\;0.52{\pm}0.18hr$, respectively. The parametric 90% confidence intervals on the mean of the differences between the two formulations (test-reference) of the log-transformed values of $AUC_t\;and\;C_{max}$ were 1.03 to 1.19 and 0.98 to 1.17, respectively. The overall results indicate that the two formulations are bioequivalent and can be prescribed interchangeably.

• 한국산림과학회지
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• 제105권1호
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• pp.73-77
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• 2016

다래의 결과지 길이에 따른 다래 과실수와 과실무게를 조사하여 결과지와 과실특성과의 상관관계를 구명하고자 하였다. 다래의 결과지가 15 cm 이하와 30 cm 이상의 경우, 평균 무게와 평균과실수는 각각 11.7 g과 12.3 g 그리고 4.6개와 13.8개였다. 그 결과 15 cm 미만의 결과지는 불량한 과실특성결과를 가져오므로 동계전정시 제거하여야 한다. 전정이 다래 과실등급별 생산량에 미치는 영향을 알아보고자 전정실험을 실시하였다. 결과모지는 80개, 결과모지의 80%를 자르는 강전정 처리구에서는 과실 총 생산량이 본당 평균 $14.3{\pm}1.5kg$이었으며, 이중 대과(15 g 이상)이 $8.2{\pm}0.9kg$, 중과(10~15 g)이 $4.0{\pm}0.7kg$ 그리고 소과(10 g 이하)이 $2.1{\pm}0.3kg$ 생산되었다. 무처리구에서는 과실 총 생산량이 본당 평균 $26.7{\pm}2.1kg$이었으며, 이중 대과는 $2.5{\pm}0.5kg$, 중과 $19.2{\pm}1.4kg$ 그리고 소과 $5.0{\pm}0.6kg$ 생산되었다. 특히, 전정처리구와 무처리구에서 15 g 이상 대과의 무게분포를 보면 무처리구는 대부분 15~16 g의 과실이 분포하였으나, 전정처리구는 15~20 g 이상까지 고르게 분포하는 것으로 나타났다. 전정을 실시하지 않는 경우 15 g 이상의 대과 생산이 쉽지 않을 것으로 판단되며, 생과용 대과 및 특과 생산을 위해서는 적절한 동계전정이 필요하다.

• 한국정보통신학회논문지
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• 제12권7호
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• pp.1160-1164
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• 2008

본 논문에서는 광대역 특성을 갖는 스트립라인 발룬을 설계 및 제작하였다. 제안된 스트립라인 발룬은 광대역 특성을 위하여 월킨슨 전력 분배기와 두 개의 광대역 위상 변환기로 구성된다. 광대역 발룬의 설계 주파수 대역은 $500{\sim}1500\;MHz$ 대역이고, 발룬 특성은 반사계수($S_{11}$) -10 dB 이하, 결합 손실이 -0.05 dB 이하가 되게 하기 위하여 세기차 ${\pm}0.5\;dB$ 이내, 위상차 $180{\pm}10$도 이내를 목표로 하였다. 제작된 광대역 스트립라인 발룬은 폭 12 mm, 길이 220 mm, 두께 2.3 mm로 크기를 가졌으며, 제작된 발룬 특설은 $500{\sim}1500\;MHz$ 대역에서 반사계수($S_{11}$) -10 dB 이하 위상차 약 $180{\pm}8$도 이내, 세기차 약 ${\pm}0.7\;dB$ 이내, 신호 손실 약 -2 dB를 보였다.

• 한국환경과학회지
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• 제24권10호
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• pp.1265-1272
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• 2015

To investigate the thermal environment over the summertime asphalt pavements, an automatic weather observation system was installed at a parking lot paved with asphalt to observe various meteorological parameters and surface temperature from July 1 to September 30, 2014. Since the number of rainy days in summer of 2014 particularly after the mid July is more than that of average data, a ratio of daily peak surface temperature above $45^{\circ}C$ was 28% which was lower than the average. The observational data about hourly average surface temperature and various heat balance factors at days where daily peak surface temperature is above $45^{\circ}C$ are as follows: An hour that had the daily maximum temperature was around 15 pm and the value was $49^{\circ}C$ approximately. Net shortwave radiation was the highest at 12pm as $800W/m^2$ and much radiation of $500W/m^2$ was absorbed at the ground between 11am and 17pm. Sensible heat that was delivered from the ground to the atmosphere was evaluated as $200W/m^2$ between 10am and 19pm. underground transfer heat up to $100W/m^2$ was measured as negative from 19pm to the next day 8am, which indicated the lower atmosphere was heated at night.

• 한국식품영양과학회지
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• 제38권11호
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• pp.1485-1491
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• 2009

거제, 고성, 고흥 및 남해산 유자의 생리활성 규명에 관한 연구의 일환으로 유자를 과육과 과피로 분리하여 주요 생리활성 성분을 분석하고 과피 물추출물의 전자공여능, 아질산염소거능 및 tyrosinase 저해활성을 비교하였다. 비타민 C 함량은 과육에서 6.34${\Pm}$0.12-10.74${\Pm}$1.25 mg/100 g의 범위였으며, 과피에서는 과육에 비하여 2.17-3.57배 정도 더 높은 함량이었다. 카로티노이드 함량도 비타민 C와 동일한 경향이었으며 고성산과 남해 재래종의 과피에서 6 mg/100 g 이상으로 타 시료에 비해 유의적으로 높은 함량이었다. 총 페놀 화합물의 함량은 남해 개량종에서 가장 높아 과육과 과피에서 각각 11.11${\Pm}$0.10 mg/100 g 및 31.76${\Pm}$0.30 mg/100 g이었다. Hesperidin과 naringin의 함량도 과육보다는 과피에서 4.81-7.80, 3.07-4.62배 정도 더 높은 함량이었으며, 과피에서 hesperidin은 45.30${\Pm}$1.18-85.76${\Pm}$3.72 mg/100 g, naringin은 28.69${\Pm}$0.85-44.96${\Pm}$1.75 mg/100 g의 범위였다. 과피 물추출물의 전자공여능은 5 mg/mL 이상 첨가 시 활성은 52.78${\Pm}$1.13-66.88${\Pm}$0.53%의 범위였으며 남해산 시료에서 유의적으로 활성이 높았다. 아질산염 소거활성은 0.5 mg/mL 농도에서는 10% 미만으로 낮았으나 시료의 첨가농도가 증가할수록 활성이 높아져 10 mg/mL 농도에서는 24.95${\Pm}$1.82-29.72${\Pm}$1.84%의 범위였다. Tyrosinase 저해활성은 2.5 mg/mL의 농도에서는 남해산 시료에서만 5.06${\Pm}$1.27%의 낮은 활성이 확인되었으나, 10 mg/mL 농도에서는 32.76${\Pm}$1.43-69.21${\Pm}$1.91%로 활성이 증가하였다.