• Korean Journal of Ichthyology
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• v.19 no.3
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• pp.193-200
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• 2007

The samples of cultured flounder (Paralichtys olivaceus) were collected from Tongyeong and Yosu in Korea and Nagasaki in Japan and processed to analyses of body and serum. Body size and weight were not significantly different between Korea and Japan produced. But the body weight of average size of flounder produced from Nagasaki was the highest from the samples. The average of fish body was not significantly different from the samples. The water content of fish body was lower in samples from Nagasaki and fat content was higher in the samples from Nagasaki and followed by Yosu and Tongyeong. The percentage of body water, fat and protein contents was Nagasaki, Yosu and Tongyeong in the order of high values. Japanese flounder showed relatively high content of body fat and muscle. The cholesterol of serum was highest in the samples of Yosu. The triglyceride of serum was highest in the samples of Nagasaki. Lipoprotein was highest in the samples of Nagasaki and enriched fat content in LDL fraction.

• The Bulletin of The Korean Astronomical Society
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• v.35 no.1
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• pp.55.1-55.1
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• 2010

대마젤란 은하에 속한 식쌍성의 시선속도 곡선을 완성하기 위하여 2009년 11월 칠레에 위치한 Cerro Tololo Inter-American Observatory (CTIO)의 1.5m 망원경과 R-C Spectrograph를 사용하여 중 분산 분광관측을 수행하였다. 분광관측은 380nm - 540nm 영역에서 $H_8,\;H_{\varepsilon},\;H_{\delta},\;H_{\Gamma},\;H_{\beta}$ 등의 흡수선을 관측하였다. 중분산으로 관측된 식쌍성의 각 구성원별에서 나오는 흡수선들은 구별되지 않으므로 이를 구별하기 위하여 구성원들의 Flux 비와 함께 gauss curves fitting 방법으로 각 흡수선들을 2개의 성분으로 분해하여 시선속도를 측정하고, 시선속도곡선을 완성하였다. 완성된 이중 시선속도 곡선은 Wilson & Devinney 차등 보정법으로 분석하여, 궤도 장반경, 질량비, 계의 시선속도 등을 구하였다. 또한 각 식쌍성들의 광도곡선을 분석하여 측광학적인 해를 구하고, 최종적으로 분광 및 측광관측의 해를 혼합하여 대마젤란은하 식쌍성들의 절대량을 구하였다. 이후 이를 바탕으로 거리를 구하여 기존에 발표된 마젤란은하의 거리와 비교하였다.

• Journal of the Korea Concrete Institute
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• v.22 no.5
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• pp.667-673
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• 2010

The near fault ground motion (NFGM) is characterized by a single long period velocity pulse with large magnitude. NFGMs have been observed in recent strong earthquakes, Northridge (1994), Japan Kobe (1995), Turkey Izmit (1999), China Sichuan (2008), Haiti (2010) etc. These strong earthquakes have caused considerable damage to infrastructures because the epicenter was close to the urban area, called as NFGM. Extensive research for the far field ground motion (FFGM) have been carried out in strong seismic region, but limited research have been done for NFGM in low or moderate seismic regions because of very few records. The purpose of this research is to investigate and analyze the seismic response of reinforced concrete bridge piers subjected to near-fault ground motions. The seismic performance of six RC bridge piers depending on three confinement steel ratios and three superstructure mass was investigated on the shaking table. From these experimental results, it was confirmed that the reduction of seismic performance was observed for test specimens with lower confinement steel ratio or more deck weight. The displacement ductility of RC bridge piers in terms of the stiffness degradation is proposed based on test results the shaking table.

• Journal of the Korea Society of Computer and Information
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• v.26 no.8
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• pp.209-220
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• 2021

The effect of body composition such as lean mass and fat mass on bone mineral density (BMD) is complex and still controversial. In this study, we investigated the relationship between body composition and bone mineral density using nation-wide data from 2008 to 2011 Korea National Health and Nutrition Examination Survey (KNHANES) in 2,139 men and 2,193 postmenopausal women aged 50 years or older. Subjects with history of medication for osteoporosis or with diseases or malignancy affecting bone metabolism were excluded. Data of anthropometric measurements and demographic characteristics were collected by trained examiner. Fasting blood sample was obtained for blood chemistry analysis. BMD of the lumbar spine, total femur, and femoral neck, and body composition such as total lean mass (TLM), total fat mass (TFM), truncal fat mass (TrFM) were measured using dual-energy X-ray absorptiometry (DXA). There were significant positive correlations between body composition indices such as lean mass and fat mass with BMD. In multiple regression analysis, TLM was positively associated with BMD after adjusting age, body mass index, monthly house income, education level, physical activity, daily calcium intake and vitamin D concentration in both men and postmenopausal women. BMD at lumbar spine and femur in lowest quartile of TLM was significantly lower than other quartiles after adjusting those confounding factors in both gender. TrFM was negatively associated with total femur BMD in male and femur neck BMD in postmenopausal women after adjusting confounding factors. In conclusion, TLM is very important factor in maintaining BMD in subjects aged 50 years or older in men and postmenopausal women.

• Journal of Practical Agriculture & Fisheries Research
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• v.19 no.1
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• pp.99-108
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• 2017

It is Lespedeza cuneata. G. don used as a remedy for cough, asthma, premature ejaculation and so on, though it has been used for a long time. In order to investigate the possibility of using Lespedeza cuneata. G. don as a raw material for functional food, we examined useful substances through analysis. In the study, 124 useful substances were analyzed and 84 of them were found to be functional. In 6 species, 6 of them were found to be functional and 5 of them were functional. In the present study, the other useful substance, D-pinitol, also confirmed its functionality. Potassium isolespedezate and Potassium lespedezate act as antibiotics, Trifolin acts as an antibiotic and hepatoprotectant, and Vitexin acts as a hepatoprotectant. D-pinitol has shown excellent efficacy in patients with prediabetic and insulin-resistant diabetes. As it contains a large amount of useful substances, it can be utilized as a highly functional food.

• Journal of the Korean earth science society
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• v.31 no.3
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• pp.234-245
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• 2010

Twenty-four hour integrated $PM_{10}$ and $PM_{2.5}$ samples were measured during springtime (March, April, and May) in Busan for three years from 2006 to 2008, and mass concentrations and metallic elements of measurement were analyzed to investigate temporal, spatial, chemical characteristics of the mass concentration and metallic elements in association with meteorological conditions including Asian Dust (AD) vs. non Asian Dust (NAD) seasons, and other air mass transport patterns. The result showed that $PM_{10}$, $PM_{2.5}$ and $PM_{10-2.5}$ concentrations were on average of $126.2{\pm}89.8$, $85.5{\pm}41.6$, and $40.7{\pm}54.9{\mu}g/m^3$, respectively, and the $PM_{2.5}/PM_{10}$ and $PM_{10-2.5}/PM_{2.5}$ ratios were 0.70 and 0.48, respectively. The highest concentrations of PM were observed when air parcels were originated from both northwest sector covering Beijing and west sector including Shanghai areas.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.142.2-142.2
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• 2012

Hoffmeister(1943)에 의해 변광성으로 발견된 V345 Cas (2MASS J23083986+5406545, ${\alpha}$(2000.0)=23h08m39.86s & ${\delta}(2000.0)=+54^{\circ}06^{\prime}54.6^{\prime\prime}$)는 B 필터에서 13.1~14.2의 광도 변화를 보이는 것으로 알려진 별이다. 우리는 레몬산 천문대(LOAO)에서 2007년과 2008년에 걸쳐 총 22일간 V345 Cas의 BVRI CCD 측광관측을 수행하여, 처음으로 V345 Cas의 년도 별 전체 광도곡선을 완성하였다. 우리의 관측 자료와 Super WASP에서 공개한 자료를 이용하여 각각 7개의 극심시각을 산출하였다. 우리가 결정한 극심시각을 포함하여 여러 문헌에서 수집한 총 68개의 극심시각을 이용하여 V345 Cas의 주기 분석을 수행하였다. 그 결과, V345 Cas의 궤도주기는 포물선 모양의 영년변화와 함께 약 30년의 규칙적인 변화를 겪고 있음을 발견하였다. 규칙적인 변화를 제3천체에 의한 광시간 효과로 가정하여 관측된 극심시각에 잘 맞는 광시간 궤도 해를 산출한 결과, 영년주기가 증가하는 경우와 감소하는 경우에 대해, 각각 29.0년과 39.7년 주기를 갖는 두 개의 광시간 궤도 해가 가능하다. 이러한 모호성을 해결하기 위해서 앞으로의 극심시각 관측이 중요하다. 2007년과 2008년 BVRI 광도곡선들은 부극심을 기준으로 좌우가 거의 대칭이며, 1년 사이에 특기할 만한 광도변화를 보이지 않았다. 우리는 이 광도곡선들을 Wilson-Devinney 쌍성 모델을 이용하여 분석하여, V345 Cas의 측광학적 해를 처음으로 산출하였다. 우리가 구한 해에 의하면, 약 88도의 궤도경사각에 두 성분별의 질량비가 약 0.5인 V345 Cas는 질량과 표면 온도가 큰 주성과 로쉬 로브를 채우고 있는 반성으로 구성된 준 분리형 식쌍성계이다.

• Applied Chemistry for Engineering
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• v.8 no.6
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• pp.967-972
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• 1997

Recovery of aromatics in extract phase which was obtained by batch equilibrium extraction between light cycle oil(LCO) and dimethylsulfoxide(DMSO) solution as solvent was investigated by re-extraction. To select the most suitable re-extraction solvent for recovery of aromatics in extract phase, distribution equilibrium was measured between extract phase and solvents. The solvents used were benzene(B), toluene(T), m-Xylene(mX), n-hexane(Hx) and n-hexane(Hx) and n-Octane(Ot). From the distribution coefficients and yields of aromatics, Hx seemed to be the most suitable. Furthermore, effects of operation parameters for re-extraction of aromatics in the extract phase were studied by batch equilibrium re-extracion with Hx as solvent. Yields of aromatics were found to increase with increasing solvent/feed (extract phase) mass ratio(S/F), while distribution coefficients of aromatics were fixed irrespective of S/F used. Operating temperature did not affect distribution coefficients and yields of aromatics. Distibution coefficients and yields of naphthalene group(carbon numer : 10~12) increased with increasing cabon number. Mass transfer rates of aromatics were also measured with a batch stirred vessel.

• Korean Journal of Food Science and Technology
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• v.33 no.1
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• pp.117-121
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• 2001

White kidney bean, Phaseolus vulgaris, contains proteinaceous inhibitors of ${\alpha}-amylase$. Two inhibitors have been purified by conventional protein fractionation methods such as ethanol precipitation, ammonium sulfate fractionation, DEAE-Sephadex ion exchange chromatography and Sephadex G-100 gel chromatography. The inhibitors were purified as I-1 and I-2 based on their elution order from the DEAE-Sephadex column. The overall purification ratio were about 15.0 and 14.8 for I-1 and I-2, respectively. The molecular weights of purified ${\alpha}-amylase$ inhibitors were 50,000 and 45,000 determined by Sephadex G-100 gel filtration and SDS-polyacrylamide gel electrophoresis. They contain $17.6{\sim}17%$ of carbohydrate, $70{\sim}80%$ of protein. The carbohydrates were composed of glucose : xylose : mannose : N-acetylglucosamine (5 : 3 : 50 : 42).

• Journal of Environmental Science International
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• v.12 no.6
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• pp.627-633
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• 2003

The PM$_{10}$ concentration and chemical composition in an western area of Busan were surveyed between March, 2001 and February, 2002. The mean concentration was 98.2 $\mu\textrm{g}$/㎥ with a range of 18.1 to 330.6 $\mu\textrm{g}$/㎥. The magnitude of metallic elements in PM$_{10}$ is as follows in decreasing order: K>Ca>Na>Al>Fe. The mean values of crustal enrichment factors for four elements (Cd, Ni, Pb and Zn) were all higher than 10, which presumably resulted from the effect of anthropogenic origin. Moreover, the wintertime values were higher than springtime and summertime values, possibly due to emissions westerly transported from industries around this area. The contribution of soil particle to airborne particle in the study area was estimated to be 9.5%.