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류근영(Keun Young Ryu),하종석(Jong Suk Ha),노수영(Soo Young No) 한국분무공학회 2001 한국액체미립화학회지 Vol.6 No.3
The Effect of four diesel with oxygenated agents fuels on spray properties from plain-onfice atomizer was investigated. The oxygenates evaluated were diglyme, MTBE, DMM and were blended in weights of 5, 10, 15, 20 and 30% in a baseline diesel fuel. The physical properties such as surface tension, density and viscosity are also measured for each blended oxygenated fuels. It was found that in physical properties of fuels considered are enough to influence spray properties, i.e. spray angle, spray tip penetration and mean drop size. Spray properties were measured by PMAS(particle motion analysis system) which is employing a point measurement technology. Spray angle increased with increase in oxygenate content. The effect, however, was not great in the higher blend level. The oxygenated fuels produced more shorter spray tip penetration than diesel fuels. SMD was decreased with the increase in blending percent. SMD for DMM and DEE are represented 10.33 and 3.41% decreasing rates respectively. It found that changes in spray characteristics of oxygenated fuel were easily large enough to impact pollutant emissions. It was clear fern this study fat spray characteristics of oxygenated fuel is one of possible cause of reducing pollutant emissions form diesel engines when oxygenated fuels is applied.
HPLC-ICP-MS를 이용한 톳의 비소 화학종 분석 및 위해성 평가
류근영(Keun-Young Ryu),심성례(Sung-Lye Shim),황인민(In-Min Hwang),정민석(Min-Seok Jung),전삼녀(Sam-Nyeo Jun),서혜영(Hye-Young Seo),박종석(Jong-Seok Park),김희연(Hee-Yeon Kim),엄애선(Ae-Sun Om),박경수(Kyung-Su Park),김경수(Kyong-Su Ki 한국식품과학회 2009 한국식품과학회지 Vol.41 No.1
본 연구는 비소 함량이 높은 해조류(10-60 ㎎/㎏) 중 무기비소 함량이 높은 톳을 대상으로 총 비소 함량 측정 및 비소종 분리, 분석을 실시하였으며, 그 결과를 바탕으로 PTWI와 비교하여 위해성 평가를 실시하였다. 전국 10곳의 지역에서 총 30종의 시료를 구입하여 ICP-MS로 총 비소 함량을 측정한 결과 건조시료를 기준으로 평균 45.65 ± 21.17 ㎎/㎏(생물기준; 3.63 ± 2.19 ㎎/㎏)의 함량을 보여 다른 나라의 여러 연구결과와 비교해 볼 때 상대적으로 낮게 확인되었다. HPLC-ICP-MS를 이용하여 분리, 분석된 톳의 주요 비소화학종은 상대적으로 독성이 강한 무기비소로 평균함량이 As(V) 40.36 ㎎/㎏, As(III) 0.37 ㎎/㎏으로 전체 비소함량의 88.6%를 차지하였다. 그러나 무기비소함량이 가장 높게 확인된 시료(생물기준; 9.19 ㎎/㎏)를 대상으로 톳의 위해성을 JECFA의 PTWI와 비교해 볼 때 6.1%로 낮은 수준이었다. 따라서 연 평균 0.1 g의 톳을 섭취하는 한국인에게서는 14.0 g/day(98.3 g/week) 이상의 톳을 지속적으로 먹지 않는 이상 톳의 섭취에 따른 위해 가능성은 미비하여 안전한 수준으로 판단된다. This study investigated arsenic speciation and risk assesment in 30 samples of hijiki purchased from local market in 10 Korean cities. The mean arsenic concentration of the hijiki samples was 45.65 ㎎/㎏ (dryness; moisture content of 91.1 ± 1.6%), and the major arsenic compound was arsenate [As(V)]. The concentrations of As(V) and As(III), as inorganic arsenic compounds, were detected to be 40.36 ㎎/㎏ and 0.37 ㎎/㎏, respectively, and made up 88.6% (40.46 ㎎/㎏) of the arsenic in the hijiki. Among the samples, the highest inorganic arsenic concentration was identified at 9.19 ㎎/㎏ (wet), and for an adult with a body weight of 60 kg was within an acceptable level as 0.7% (6.43 ㎍/60 ㎏/week) when compared with the provisional tolerable weekly intake (PTWI) (900 ㎍/60 ㎏/week), and would be considered safe with respect to health-hazardous effects.
KTX수서역 설계를 통한 현대 공공공간의 새로운 실험에 관한 연구
류근영(Ryu, Keun-Young) 대한건축학회 2012 대한건축학회 학술발표대회 논문집 Vol.32 No.2
The term ‘public’ seems to have very ambiguous meaning, and nobody can clearly explain that meaning. In other words, due to the various and ambiguous meaning, the term ‘public space’ can be understood differently depending on the situation. Based on this fact, the purpose of this thesis is to shed new light on the notion of public space today. Before the design experiment, to narrow down the position of public spaces, it is closely examined the various publicness of general veiw, and it is covered with the potential of in between space between programs. Finally, the experiment of the new publis space is examined by the KTX suseo station design project.
붕장어(Conger myriaster)의 일반성분 및 맛 성분의 계절별 변화 분석
류근영(Keun-Young Ryu),심성례(Sung-Lye Shim),김원(Won Kim),정민석(Min-Seok Jung),황인민(In-Min Hwang),김준형(Jun-Hyeong Kim),홍철희(Cheul-Hee Hong),정찬희(Chan-Hee Jung),김경수(Kyong-Su Kim) 한국식품영양과학회 2009 한국식품영양과학회지 Vol.38 No.8
외식산업에서의 붕장어 이용성 증대에 기여하고자 계절에 따른 일반성분, 지방산, 핵산관련성분 및 아미노산의 변화를 분석하였다. 여름철 붕장어의 조지방 함량이 3.2%로 가장 낮게 나타났으며, 이는 붕장어의 산란기에 따른 영향으로 생각된다. 지방산 조성 중 포화지방산인 palmitic acid, stearic acid, 단일불포화지방산인 oleic acid, palmitoleic acid 그리고 다가불포화지방산인 DHA, EPA가 주요 지방산으로 확인되었다. 전체 지방산 중 oleic acid가 36.76~45.11%로 가장 높은 함량을 차지하였고, 다가불포화지방산의 조성비가 봄에서 겨울로 갈수록 증가하는 경향을 나타냈다. 그러나 지방산 조성비의 계절적 차이는 뚜렷하게 나타나지 않았다. 핵산관련성분 중 맛에 직접적인 영향을 주는 IMP(3.617~5.524 μ㏖/g)와 Hx(0.913~2.238 μ㏖/g) 그리고 무미의 HxR(0.625~1.652 μ㏖/g)이 ATP(0.058~0.083 μ㏖/g), ADP(0.145~0.161 μ㏖/g), AMP(0.166~0.179 μ㏖/g)보다 높은 함량을 보였으며, 어류의 지미성분인 IMP와 Hx의 함량이 7.219 μ㏖/g으로 겨울에 가장 높게 나타났다. 아미노산 중 glutamic acid(14,178.7~7,802.6 ㎎%), aspartic acid(4,669.2~8,259.0 ㎎%), lysine(4,198.3~7,540.8 ㎎%), leucine(3,843.6~6,782.1 ㎎%) 등이 주요 구성아미노산으로, histidine(199.6~644.4 ㎎%), glycine(94.8~152.2㎎%), alanine(35.3~71.2 ㎎%), glutamic acid (44.1~70.6㎎%) 등이 주요 유리아미노산으로 확인되었으며, 정미물질 중 맛과 관련 있는 유리아미노산의 총량은 여름철과 겨울철에 각각 1,179.2과 1,605.2 ㎎%로 높게 나타났다. 어류의 주요 정미성분의 함량으로 확인한 결과 핵산관련성분은 겨울철이, 유리아미노산은 여름철이 가장 많았으나 이들 정미성분의 함량이 특정 계절에만 높게 나타나지는 않았다. 따라서 붕장어의 맛은 정미관련성분들과 관련이 크지만 단순히 정미성분만이 아닌 다른 여러 성분과의 복합적인 상호작용에 의한 결과라고 생각된다. Conger eel (Conger myriaster) is used as a well-being food in the foodservice industry in Korea. We analyzed not only the proximate composition but also the taste components affecting conger eel, which are fatty acids, nucleotides, amino acids, etc. Concerning the composition, the crude lipid was the lowest in summer at 3.2%, which is considered due to spawning period. The major fatty acids were C16:0, C16:1, C18:0, C18:1, C20:5, and C22:6. The C18:1 content was the highest among the fatty acids and the content varied between 36.76 and 45.11% by season. Seasonal change in the content of poly-unsaturated fatty acids was increased from spring to winter in conger eel. Among the nucleotides, the contents of IMP (3.617~5.524 μ㏖/g) and Hx (0.913~2.238 μ㏖/g), which is closely related to taste, and the concentrations of IMP and Hx were the highest (7.219 μ㏖/g) in winter, and HxR (0.625~1.652 μ㏖/g) was higher than ATP (0.058~0.083 μ㏖/g), ADP (0.145~0.161 μ㏖/g), and AMP (0.166~0.179 μ㏖/g). In conger eels, the major total and free amino acids were glutamic acid (14,178.7~7,802.6 ㎎%), aspartic acid (4,669.2~8,259.0 ㎎%), lysine (4,198.3~7,540.8 ㎎%), leucine (3,843.6 ~6,782.1 ㎎%), and histidine (199.6~644.4 ㎎%), glycine (94.8~152.2 ㎎%), alanine (35.3~71.2 ㎎%), glutamic acid (44.1~70.6 ㎎%), respectively, but the concentration of amino acids was different by season. The content of free amino acids, which is related to the taste component, was detected as high in summer and winter at 1179.2 and 1,605.2 ㎎%, respectively.
서혜영(Hye-Young Seo),노기미(Ki-Mi No),심성례(Seong-Lye Shim),류근영(Keun-Young Ryu),한규재(Kyu Jae Han),라젠드라 게왈리(Rajendra Gyawali),김경수(Kyong?Su Kim) 한국식품영양과학회 2006 한국식품영양과학회지 Vol.35 No.7
건생강 제품의 진위판별을 위한 기초자료를 제공하기 위하여 건조된 생강으로부터 휘발성 향기성분을 추출하여 향기특성을 분석하고, MDGC/MS에 의해 키랄성 휘발성분의 enantiomeric composition을 분석하였다. 건생강에서 총 57종을 동정하였으며 주요 휘발성 향기성분은 zingiberene, β-sesquiphellandrene, β-bisabolene, (E,E)-α-farnesene 및 α-curcumene이었다. 건생강에 함유된 키랄성 향기성분 중에 서 enaniomeric composition을 측정하기 위해 선택된 키랄화합물 중 α-pinene 및 nerolidol은 높은 enantiomeric purity(>96%)로 검출되었으며, β-pinene은 (R)-enantiomer 만이 검출되어 특이적이었다. α-Terpineol은 (R)-enantiomer가 72%로 높게 나타났으며 linalool과 4-terpineol은 두 이성질체가 혼합된 것으로 나타났다. Limonene의 enantiomeric excess(ee, %)는 17.2%로 (S)-enantiomer가 주요 이성질체이었다. 따라서 이러한 키랄성 향기성분의 enantiomeric composition은 건생강의 진위평가를 위한 변수로 사용될 수 있을 것으로 생각된다. The volatile compounds of Zingiber officinale Roscoe were extracted by simultaneous steam distillation and extraction (SDE) method and identified with gas chromatography/mass spectrometer (GC/MS) analysis. Enantiomeric compositions of chiral compounds were determined by multidimensional gas chromatography/ mass spectrometer (MDGC/MS). A total of 57 compounds were identified and quantified, including zingiberene, β-sesquiphellandrene, β-bisabolene, (E,E)-α-farnesene and α-curcumene. Among them, zingiberene (38.41%) was found as the predominantly abundant component. α-Pinene and nerolidol in dried ginger were detected by high enantiomeric purity (>96%) for (S)-form, and β-pinene was detected only (R)-form. The enantiomeric composition of α-terpineol revealed 72.0% for (R)-form, and linalool and 4-terpineol showed mixtures of both enantiomers. (S)-Enantiomer was the major enantiomer of limonene having enatiomeric excess of 17.2%. Hence the enantiomeric composition of these compounds can be used as parameter for authenticity control of Zingiber officinale.