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RISS 인기검색어
- 검색키워드
- 저자 : 이승용 ( Chang Ho Moon (검색결과 5 건)
- 무료
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Netplankton 과 Nanoplankton 크기별 in vivo Fluorescence 의 차이
문창호,이승용 ( Chang Ho Moon,Seung Yong Lee ) 한국수산과학회 1994 한국수산과학회지 Vol.27 No.6
In the South Sea of Korea, in vivo fluorescence intensity (IVF) and extractable chlorophyll a concentration were measured to determine whether there was significant deference in in vivo fluorescence per unit chlorophyll α(R) between netplankton and nanoplankton size classes (less than 22㎛). IVF and chlorophyll α were linearly related for both size classes, but R`s were significantly different between two size classes. The R of nanoplankton was about 7 times higher than that of netplankton. Therefore, the size dependency of R must be taken into consideration when size fraction of phytoplankton biomass is determined from the measurements of in vivo fluorescence intensity.
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동해 극전선역의 영양염류 순환과정 4 . Clorophyll a 분포 , 신생산 및 질산염의 수직확산
문창호(Chang Ho Moon),양성렬(Sung Ryull Yang),조현진(Hyun Jin Cho),이승용(Seung Yong Lee),김석윤(Seok Yun Kim) 한국수산과학회 1998 한국수산과학회지 Vol.31 No.2
A study on the biological and chemical characteristics in the middle last Sea of Korea was carried out at 31 stations in October 11∼18, 1995 on board the R/V Tam-yang. The chlorophyll a concentration, new and regenerated production, and the vertical diffusion of nitrate from the thermocline structure were investigated. From the vertical distribution of chlorophyll a, subsurface maxima were observed near the thermocline at most stations including the frontal zone, except at the southern stations where the maximum chlorophyll a concentration occurred at the surface. The nanophytoplankton was the most dominant fraction comprising 83.5% of total phytoplankton cell numbers, but netphytoplankton were common at the southern stations where the dominant species were Rhizosolenia sp. Nitrogenous new production and regenerated productions were measured using the stable isotope (15)^N nitrate and ammonia uptake method. The vertically integrated nitrogen production varied between 8.410 and 72.945 ㎎ N m^(-2) d^(-1), The f-ratio, which is the fraction of new production from primary production, waried between 0.03 and 0.72, indicating that 3% to 72% of primary production was Supported by the input of nutrients from below the euphotic zone and the rest are supported by ammonia recycled within the euphotic layer. This range of f-ratio encompasses from extremely oligotrophic to eutrophic area characteristics, The differences in productivity and f-ratio among stations were related to frontal structure and the bottom topography. The values were high near the frontal ions and low outside of it, and the station near Ulleng Island showed the highest f-ratio. Vertical diffusion coefficients were calculated from both the water column stability (Kz-1) of King and Devol`s equation (1979) and new nitrogen requirement (Kz-2), The values of Kz-2 (0.11∼0.55 ㎠/s) were relatively low compared to the valutas reported prewiously.
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벤치급 CO<sub>2</sub> 포집공정에서 흡수반응기의 내부구조에 따른 K-계열 고체흡수제의 성능평가
김재영 ( Jae-young Kim ),임호 ( Ho Lim ),우제민 ( Je Min Woo ),조성호 ( Sung-ho Jo ),문종호 ( Jong-ho Moon ),이승용 ( Seung-yong Lee ),이효진 ( Hyojin Lee ),이창근 ( Chang-keun Yi ),이종섭 ( Jong-seop Lee ),민병무 ( Byoung-moo Mi 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.3
본 연구에서는 벤치급 건식 CO<sub>2</sub> 포집 성능평가 장치에서 흡수반응기 내부의 구조와 형태에 따른 K-계열 흡수제(KEP-CO2P2, 한국전력공사 전력연구원)의 성능특성을 확인하였다. 흡수반응기 혼합영역(mixing-zone)에 구조와 형태가 다르게 제작된 두 종류의 열교환기가 적용되었으며, 각각 CASE 1과 CASE 2로 나뉘어 동일한 조업조건으로 연속운전을 수행하였다. 연속운전동안 흡수반응 온도는 75~80 ℃, 재생반응 온도는 190~200 ℃, 그리고 반응기체(CO<sub>2</sub>) 농도는 12~14 vol%으로 설정하였다. 특히 흡수제의 흡수능 비교를 위해 흡수반응기 혼합영역의 차압을 400~500 mmH<sub>2</sub>O로 유지하며 운전하였다. 또한 반응 후 채집한 시료는 반응성 비교를 위해 TGA를 이용하여 물성분석을 하였다. CASE 1 실험에서 CO<sub>2</sub> 제거효율과 동적흡수능은 각각 64.3%, 2.40 wt%으로 산출 되었고, CASE 2 실험에서 CO<sub>2</sub> 제거효율과 동적흡수능은 각각 81.0%, 4.66 wt%으로 산출되었다. 또한 반응 후 흡수제에 대한 TGA 측정 결과의 무게감량을 이용하여 흡수제의 동적흡수능을 계산한 결과, CASE 1과 CASE 2 실험에서 반응 후 흡수제의 동적흡수능은 각각 2.51 wt%와 4.89 wt%으로 산출되었다. 결론적으로 동일한 조업조건에서 흡수반응기 내부에 삽입되는 열교환기의 구조와 형태에 따라 흡수제의 성능 차이가 있는 것을 확인하였다. In this study, the performance characteristics of the K-based sorbents (KEP-CO2P2, KEPCO RI, Korea) has been studied in relation with the heat exchanger structure and shape in a mixing zone of the carbonator in the benchscale dry CO<sub>2</sub> capture process. Two types of heat exchangers (different structure and shape) were used in the carbonator as CASE 1 and CASE 2, in which the experiment has been continuously performed under the same operating conditions. During the continuous operation, working temperature of carbonator was 75 to 80 ℃, that of regenerator was 190 to 200 ℃, and CO<sub>2</sub> inlet concentration of the feed gas was 12 to 14 vol%. Especially, to compare the dynamic sorption capacity of sorbents, the differential pressure of the mixing zone in the carbonator was maintained around 400 to 500 mm H<sub>2</sub>O. Also, solid samples from the carbonator and the regenerator were collected and weight variation of those samples was evaluated by TGA. The CO<sub>2</sub> removal efficiency and the dynamic sorption capacity were 64.3% and 2.40 wt%, respectively for CASE 1 while they were 81.0% and 4.66 wt%, respectively for CASE 2. Also, the dynamic sorption capacity of the sorbent in CASE 1 and CASE 2 was 2.51 wt% and 4.89 wt%, respectively, based on the weight loss of the TGA measurement results. Therefore, It was concluded that there could be a difference in the performance characteristics of the same sorbents according to the structure and type of heat exchanger inserted in the carbonator under the same operating conditions.
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박철,문창호,이승용 한국수산학회 1993 한국수산과학회지 Vol.26 No.2
아산만에서 영양염 및 입자성 유기물의 계절적 변화를 조사하였다. 영양염은 8월에 높고 2월에 낮았으며 무기 질소와 인산 인의 원자비는 5월의 24.8을 제외 하고는 Redfield ratio와 유사하였다. 5월에 인산 인을 제외한 다른 영양염들은 염분이 31.5∼32.0‰까지는 염분이 증가할수록 감소하였으나 그후 다시 증가하여 하구 내에서 영양염 공급이 있음을 시사해주고 있다. 그러나 8월의 조사에서 영양염과 염분이 좋은 역상관 관계는 이 시기에 영양염 공급원이 담수 유입으로 추정된다. chlorophyll α 농도는 5월에 최대이었고 조사시기 동안 Rb/Ra(Rb: fluorescence before acidification, Ra: fluorescence after acidification) 비가 비교적 낮아 조사해역의 식물플랑크톤이 생리적으로 성장하기에 나쁜 환경에 있는 것으로 사료된다. 입자성 유기 규소(PBSi)와 입자성 유기탄소(POC)의 비가 낮고 PBSi/chlorophyll α 비 및 POC/chlorophyll α 비가 상대적으로 높아 아산만에서 저층으로부터 많은 non-living detritus의 공급이 있는 것으로 판단된다. Seasonal distributions of nutrients and particulate organic matter were investigated in Asan Bay, Korea. Most of nutrients were high in August and low in February. The atomic ratios of inorganic nitrogen to phosphorous were close to Redfield ratio except in May when the ratio was 24.8. In May, nutrient concentrations except phosphorous decreased with salinity until 31.5∼32.0‰, but the concentrations increased again with salinity, impling that there were nutrient input sources within the estuary. However, significant inverse relationships between nutrients and salinity in August suggest that nutrient sources were river discharge. Maximum chlorophyll α concentrations occurred in May. Relatively low ratios of R_b to R_a(R_b: fluorescence before acidification; R_a: fluorescence after acidification) during the study periods indicate that phytoplankton were not in good physiological condition. Relatively low ratio of particulate biogenic silica(PBSi) to particulate organic carbon(POC) and high ratios of PBSi and POC to chlorophyll a during the study periods suggest input of non-living detrital PBSi and POC from bottom in Asan Bay, where strong tidal mixing occurs.
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