유동상 생물반응기에 의한 난분해성물질이 포함된 염색-제지 혼합폐수처리

김홍록,장일헌,서유덕,박영규 嶺南大學校 環境問題硏究所 1993 環境硏究 Vol.13 No.1

환경관리공단 대구사업소 폐수종말처리장으로 유입되는 염색-제지 혼합폐수를 대상으로 유동상 생물반응기로 담체충진율을 10%와 20%로 변화시키면서 처리한 결과, 담체충진율을 10%로 하여 BOD용적부하 1.52∼6.4㎏ BOD/㎥·day, COD용적부하 1.40∼4.81kg ??/㎥·day로 처리할 때 유출수의 평균 BOD는 216㎎/ℓ, 평균 ?? 농도는 241㎎/ℓ이었으며, BOD 및 ??의 평균제거율은 각각 73%, 65% 이었다. 담체를 20% 충진하여 BOD용적부하 1.8∼5.81㎏ BOD/㎥·day, COD용적부하 1.5∼4.85㎏ ??/㎥·day로 처리할 때 유출수의 평균BOD는 188㎎/ℓ, 평균 ?? 농도는 223㎎/ℓ이었으며, BOD 및 ??의 평균제거율은 각각 79%, 69%로 담체중진율 20%가 다소 높게 나타났다. 담체를 10% 충진한 경우 Y, ??는 각각 0.28(㎏ MLVSS/㎏ BOD)와 0.05(??)이었으며, 담체를 20% 충진한 경우의 Y, ?? 값은 0.30(㎏ MLVSS/㎏ BOD) 와 0.08(??)이었다. This study was performed to investigate the biological treatability and to determine the biokinetic coefficient by Fluidized Bio-reactor using 10% media and 20% media for dyeing and paper manufacture mixing wastewater of Taegu Namchun Sewage Treatment Plants. The dyeing and paper manufacture mixing wastewater contained BOD 601∼1.194mg/l and ??424∼812mg/ℓ was treated by Fluidized Bio-reactor. The conclusions are as follow : The 73% of BOD and 65% ?? were removed by Fluidized Bio-reactor using 10% media with the loading range of 0.5∼1.52kg BOD/kg MLVSS·day and 0.53∼1.24kg ??/kg MLVSS·day. The 79% of BOD and 69% ?? were removed by Fluidized Bio-reactor using 20% media with the loading range of 0.32∼0.8㎏ BOD/㎏MLVSS·day and 0.28∼0.66㎏ ??/㎏ MLVSS·day. The biomass yield coefficient(Y) and microbial decay coefficient(??) were shown as 0.28kg MLVSS/kg BOD and 0.05 ?? in using 10% media, and 0.30kg MLVSS/kg BOD and 0.08 ?? in using 20% media, respectively.

항파상풍 톡소이드 주사후 항파상풍 항체 역가

이한식,하영록,구홍두,장석준,심호식,김승환,이정운 대한응급의학회 1996 대한응급의학회지 Vol.7 No.2

Objective : Tetanus decreased in prevalence since the systemic vaccination began in 1940s. Despite of the improvement in treatment like critical care with ventilatior or antibiotics, the mortality rate resides around 45%. Currently the tetanus prevention protocol recommends immunization in infancy and boosters every tenth years. Thereafter the immunization with toxoid only or toxoid plus immunoglobulin injections is recommended according to the type of injury. In most of ED in Korea, only tetanus immunoglobulin is given without any basis. Previously we proved the effect that passive immunization with the immunoglubulin 250 IU last long for only a month. At this time we measured the effect of the active immunization with toxoid and its effect was compared to the effect of the tetanus immunoglobulin to find out the logical tetanus prevention after an injury. Method: 20 healthy adult volunteers were injected with tetanus toxoid and their anti-tetanus antibody titers measured before the injection, 1 week and 4 weeks after the inection. No volunteers have taken any medication for chronic illness(e.g. hepatits, tuberculosis) or had an tetanus immunization or booster in the last 6 months. Antibody titers were measured by IMMUNOZYM??-TETANUS and t-test was performed on the results, Results: 1. Total 20 volunteers(12 males and 8 females) were participated. 2. Subjects` ages were 21 to 44 years old and there were no relevance to the antibody titer. 3. The antibody titers of before the anti-tetanus toxoid injection and 1 week, 4 weeks after the injection revealed significant difference and the antibody titers of the first and the forth week after the injection also showed a significant difference. Conclusion: Currently in Korea, the tetenus immunoglobulin 250 IU given alone as tetanus prevention was injected, but it did not elevate the anti-tetanus antibody titer for 4 weeks where as tetanus toxoid injected intramuscularly did significantly. Therefore, tetanus toxoid should be given on the dirty injuries with additional tetanus immunoglobulin injection to accomplish the correct method of tetanus, tetanus toxoid prevention.

대전광역시 양축농가의 축분뇨 관리 실태 및 VOCs 농도 조사

이봉덕,이수기,오홍록,허정민,정기철,김성복 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.1

This study was carried out to investigate the style of livestock house, concentration of malodorous substances of livestock feces and livestock houses in Daejeon area. Among the livestock houses investigated, as most of cow pens(94.5%) have sawdust or chaff on the bottom, there was no leakage of feces out of pen. Most pig pens adopted slury style, but some of them currently use buffering material on the bottom. It is thought that there will be no possible contamination leakage. When it comes to hen house, all the broiler house use litters on the bottom and all the layer house use scrapper. It is also thought that there will be no possible contamination leakage. 3 out of 12 deer pens used buffering material on the bottom, 10 places were maintained in a traditional method, and 7 places left possibility of contamination leakage considering whether the roof was installed or not. The contents of ammonia, amine and volatile fatty acid in fresh feces were lower compared to rotten feces, but the concentration of sulfur-containing matter - hydrogen sulfide, methylmercapthan and ethylmercapthan were higher compared to rotten feces. In the case of malodorous ingredient in livestock houses, only small amount of ammonia and hydrogen sulfide were detected in pig pen and hen house, and other ingredients were not detectable. And those who are engaged in animal husbandry reacted negatively to the use of feed additives for decreasing malodor. In conclusion, it is not worrisome that contamination can be leaked out of animal raising facilities. But if we take into consideration that the point of investigation time is wintry season, there should be more considerate attitude. And feed additives for decreasing malodor need establishing criteria in the manufacturing process.

식도를 침범한 반흔성 유천포창

김영선,박동규,김윤배,김용식,김창덕,진윤태,엄순호,류호상,전훈재,현진해,김경오,정록선,빅재홍 대한소화기내시경학회 2001 Clinical Endoscopy Vol.23 No.6

Design of a Compact Pneumatic Power Generator With a Self-Regulating Mechanism for Mobile Application

Kim, Kyung-Rok,Hong, Yun-Pyo,Kim, Kyung-Soo,Kim, Soohyun IEEE 2017 IEEE/ASME transactions on mechatronics Vol.22 No.5

<P>The pneumatic actuator has high potential as an actuator for mobile devices due to its high power density, simplicity, compactness, light weight, and low cost. Moreover, inherent compliance of the pneumatic actuator improves safety and dynamic performance, which are strongly required for wearable robots. However, due to its need for a bulky air compressor, which is intended for stationary use, it is hard to apply a pneumatic actuator to mobile robots. To replace the air compressor, pneumatic energy sources utilizing chemical fuel were previously proposed and the potential of the hydrogen peroxide as a pneumatic energy source was proved. Nevertheless, pneumatic energy sources driven by hydrogen peroxide are generally bulky, which are hard to apply for a mesoscale system such as prosthetics. To address this challenge, this paper proposes novel pneumatic power generator driven by hydrogen peroxide. By applying a passive injection component and a mechanical pressure feedback mechanism, the pneumatic power generator regulates pressure by itself, without any control efforts, which results in compact size. In addition, a separated catalytic reactor and a fuel tank guarantee safety and mobility. The performances and energetic characteristics of the proposed pneumatic power generator are examined by both experiment and mathematical modeling.</P>

Combined repeated-dose toxicity study of silver nanoparticles with the reproduction/developmental toxicity screening test

Hong, Jeong-Sup,Kim, Suhyon,Lee, Sang Hee,Jo, Eunhye,Lee, Byungcheun,Yoon, Junheon,Eom, Ig-Chun,Kim, Hyun-Mi,Kim, Pilje,Choi, Kyunghee,Lee, Moo Yeol,Seo, Yeong-Rok,Kim, Younghun,Lee, Yeonjin,Choi, Jon Informa UK, Ltd. 2014 Nanotoxicology Vol.8 No.4

<P>Combined repeated-dose toxicity study of citrate-capped silver nanoparticles (7.9 ± 0.95 nm) with reproduction/developmental toxicity was investigated in rats orally treated with 62.5, 125 and 250 mg/kg, once a day for 42 days for males and up to 52 days for females. The test was performed based on the Organization for Economic Cooperation and Development test guideline 422 and Good Laboratory Practice principles. No death was observed in any of the groups. Alopecia, salivation and yellow discolouration of the lung were observed in a few rats but the symptoms were not dose-dependent. Haematology, serum biochemical investigation and histopathological analysis revealed no statistically significant differences between control group and the treated groups. Toxicity endpoints of reproduction/developmental screening test including mating, fertility, implantation, delivery and foetus were measured. There was no evidence of toxicity.</P>

내시경적 전기응고술로 치료한 회장 말단의 Dieulafoy 양 병변 1 예

김용식,김재선,이창홍,김윤홍,김경오,박영태,김효정,정록선,조영직,고동욱 대한소화기내시경학회 2001 Clinical Endoscopy Vol.23 No.6

Ground Tracking Support Condition Effect on Orbit Determination for Korea Pathfinder Lunar Orbiter (KPLO) in Lunar Orbit

Kim, Young-Rok,Song, Young-Joo,Park, Jae-ik,Lee, Donghun,Bae, Jonghee,Hong, SeungBum,Kim, Dae-Kwan,Lee, Sang-Ryool The Korean Space Science Society 2020 Journal of astronomy and space sciences Vol.37 No.4

The ground tracking support is a critical factor for the navigation performance of spacecraft orbiting around the Moon. Because of the tracking limit of antennas, only a small number of facilities can support lunar missions. Therefore, case studies for various ground tracking support conditions are needed for lunar missions on the stage of preliminary mission analysis. This study analyzes the ground supporting condition effect on orbit determination (OD) of Korea Pathfinder Lunar Orbiter (KPLO) in the lunar orbit. For the assumption of ground support conditions, daily tracking frequency, cut-off angle for low elevation, tracking measurement accuracy, and tracking failure situations were considered. Two antennas of deep space network (DSN) and Korea Deep Space Antenna (KDSA) are utilized for various tracking conditions configuration. For the investigation of the daily tracking frequency effect, three cases (full support, DSN 4 pass/day and KDSA 4 pass/day, and DSN 2 pass/day and KDSA 2 pass/day) are prepared. For the elevation cut-off angle effect, two situations, which are 5 deg and 10 deg, are assumed. Three cases (0%, 30%, and 50% of degradation) were considered for the tracking measurement accuracy effect. Three cases such as no missing, 1-day KDSA missing, and 2-day KDSA missing are assumed for tracking failure effect. For OD, a sequential estimation algorithm was used, and for the OD performance evaluation, position uncertainty, position differences between true and estimated orbits, and orbit overlap precision according to various ground supporting conditions were investigated. Orbit prediction accuracy variations due to ground tracking conditions were also demonstrated. This study provides a guideline for selecting ground tracking support levels and preparing a backup plan for the KPLO lunar mission phase.

Electrogenerated Chemiluminescent Chemodosimeter Based on a Cyclometalated Iridium(III) Complex for Sensitive Detection of Thiophenol

Kim, Kyoung-Rok,Kim, Hoon Jun,Hong, Jong-In American Chemical Society 2019 ANALYTICAL CHEMISTRY - Vol.91 No.2

<P>Thiophenol is the simplest aromatic thiol that is utilized for various applications in industry and agriculture. However, it should be used with care because thiophenol is readily absorbed into the human body by inhalation and ingestion, which leads to serious internal injuries. Thus, there is an urgent need for real-time and accurate monitoring of thiophenol. Despite remarkable advantages of electrogenerated chemiluminescence (ECL) analysis, ECL thiophenol probes have never been reported. Herein, a new strategy for the rapid detection of thiophenol by use of an ECL turn-on chemodosimeter based on a cyclometalated Ir(III) complex is described. This analytical system showed superior sensitivity [limit of detection (LOD) value, 3.8 nM] in comparison to the conventional fluorescence method. In addition, our system exhibited remarkable selectivity and reaction rate toward thiophenol over other analytes. Moreover, it was successfully applied to quantify thiophenol in real water samples, providing a new proof-of-concept for field monitoring based on ECL.</P> [FIG OMISSION]</BR>

A Novel Pneumatic Generator with Pressure-Feedback Mechanism for Self-Injection of Hydrogen Peroxide

Hong, Yun-Pyo,Kim, Kyung-Rok,Kim, Kyung-Soo,Kim, Soohyun IEEE 2017 IEEE/ASME transactions on mechatronics Vol.22 No.5

<P>This paper presents a novel pneumatic generator based on the catalytic decomposition of hydrogen peroxide for producing the pressurized gas for mobile robotic systems driven by pneumatic actuators, thus replacing portable air compressors driven by electric motors. By adopting a pressure-feedback mechanism, hydrogen peroxide is autonomously self-injected into the catalytic reactor without the use of additional injection mechanisms such as electric micropumps. Additionally, the dynamic behavior of pressure generation is illustrated by both an analytic model and experiments. It is experimentally demonstrated that the proposed system has a considerably higher power density than a battery and electrical motor system.</P>