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중부지역 옥수수 파종기에 따른 생육단계 및 수량성 변화
서종호, 문중경, 정건호, 서민정, 구자환, 박장환, 배환희, 신성휴, 권영업 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2
Maize hybrids were planted on April 1, April 25, May 20 and June 15 in 2012, 2013 at the experimental paddy and upland fields in Suwon city , respectively to know changes of growth stage and yield according to different planting time. Maize planting on April 1 was not recommended because total growing days at planting on April 1 was not different with that at planting on April 25 due to many days from planting to emergence over 20 days at planting on April 1. Total growing days were not much different among three planting time after April 25 because days from silking to maturity was lengthened though days from planting to silking was shortened at later planting time. Stalk weight was decreased as planting time was delayed, particularly at planting times after May 20 at paddy field by excess water injury during early growth stage. But, grain yield was not low as in May and June. It is needed to introduce early maturity maize variety as Yanganok at late planting for higher grain yield and enough time for soil preparation for next winter crops
김인태,박환서,유승곤,김환영,김준형 한국공업화학회 2004 응용화학 Vol.8 No.1
In the previous study, we suggested a new concept, named as GRSS(Gel-Route Stabilization/Solidification) and investigated a material system applicable to volatile radioactive waste, a reaction condition and chemical limitations. From these results, this paper investigated the effect of some additives, which have been considered as the major component of ceramic waste forms(apatite and sodium zirconium phosphate), on the thermal stability and chemical durability. The Si-P system with Ca at appropriate composition shows good thermal stability but low chemical durability while the Si-P system with Zr shows relatively low thermal stability but relatively high chemical durability.
김인태,박환서,김환영,유재형,김준형 한국공업화학회 2002 응용화학 Vol.6 No.2
By gelation with sodium silicate and phosphorous oxide in binary system, we investigated the possibility to fix the volatile alkali metal chlorides in a highly stable matrix at high temperature if the product gel is further solidified to form glass or ceramic waste form. The binary system with different metal chloride(MCl) loadings underwent gelation reaction at 70℃ for 1 day and dried at 110℃ for 1 day. XRD analysis showed that all the dried gel contained NaCl and some unknown crystalline phase. From the experimental results, the reaction mechanism can be proposed as follows. Also, the possibility of Cs vaporization could be lowered by the application of the new gel-route stabilization/solidification to treat waste salt. (G,Na)+MCl→(G,M)+NaCl, (G.H)+MCI→(G,M)+HCl.
김인태,박환서,유승곤,김환영,김준형 한국공업화학회 2003 응용화학 Vol.7 No.2
A new concept for the stabilization and solidification of volatile radioactive wastes via gelation in a simple material system is introduced in this paper. Using sodium silicate as a reaction module and phosphoric acid as a catalyst or stabilization agent. CsCl is chemically converted to thermally stable compounds. The heat-treated product at 1000℃ contained a cristobalite crystalline framework and a glassy phosphorus-rich phase with a high Cs content. The morphology looked like honey flowing on the honeycomb. From TG/DT analysis, Cs could not be vaporized below 1300℃ by changing the aging conditions and molar ratio of Si/p. As a new concept, GRSS(gel-route stabilization and solidification) could give us the chance to make the high temperature waste conditioning process more stable and economical.
서울시내 고등학교 위탁급식의 급식비와 투자비의 실태 및 위탁업체의 기대수준 비교 분석
양일선,배환미,김현아,신서영,조미나,박수연,차진아,이보숙 한국식생활문화학회 2002 韓國食生活文化學會誌 Vol.17 No.5
The purposes of this study were to a) find out the operational characteristics of the contract-managed highschool foodservice in Seoul, b) investigate the expected level of meal-price and facilities investment cost perceived by contract-managed highschool foodservice managers c) compare the present level and expected level of meal-price and facilities investment cost. From October 12 to November 13 in 2001, the questionnaires were mailed to 249 high schools which was managed by contract foodservice company with respondent rate 40.2%. Data were analyzed using SPSS Win(10.0) for descriptive analysis and one group paired t-test. The results of this study were as follows ; 1. The student enrollment of highschools run by contract-managed foodservice was 1,243 with 72.6% participation rate of school lunch program. The average meal-price was 2,138 won. The average annual period of school foodservice operation was 156.78 days per year. The average contracting period was about 3 years. 2. The average cost concerned in the facilities investment amounts 169,578,180 won at the initial investment and 25,204,092 won at the repairs and maintenance cost in the course of operation. 3. The present level of meal-price and facilities investment cost were respectively 2,136won/meal and 171,157,336.72 won. And expected level.of meal-price and amount of facilities investment cost were 2,418.75 won and 121,353,215.19 won. Comparing the present level with expected level of the meal-price and facilities investment cost, expected level of meal-price was significantly higher than the present level of meal-price(p<.001) and expected level of facilities investment cost was significantly lower than present level of facilities investment cost(p<.001).
Correction-Dead Reckoning using Map Matching Information in an Underground Parking Lot
Myung Hwan Seo,Jeeseon Kim,Sojin Park,Dongkwon Suh 사단법인 항법시스템학회 2023 Journal of Positioning, Navigation, and Timing Vol.12 No.4
In this paper, we propose a Correction Dead Reckoning (CDR) solution using correction information such as Map Matching FeedBack (MMFB) in an underground parking lot. In order to correct position errors in an underground parking lot, vehicle position and heading errors are corrected using MMFB information in road link properties. The proposed method was applied to an in-vehicle navigation system and tested. The experimental results show that the proposed robust dead reckoning solution corrects Dead Reckoning (DR) position errors that occur when driving for a long time in an underground parking lot.
서동철(Dong-Cheol Seo),강세원(Se-Won Kang),김현욱(Hyunook Kim),한명자(Myung-Ja Han),임병진(Byung-Jin Lim),박종환(Jong-Hwan Park),김갑순(Kap-Soon Kim),이영재(Yeong-Jae Lee),최익원(Ik-Won Choi),허종수(Jong-Soo Heo),조주식(Ju-Sik Cho) 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.2
주암호 상수원 상류지역에 위치한 복내 바이오파크 인공습지의 수생태학적 효율 향상을 위한 관리 방안을 제시하기 위하여 시기별, 계절별 및 오염물질 부하량별 수처리 효율을 평가하였다. 유입원수의 BOD, SS, T-N 및 T-P의 함량은 각각 1.87-4.23, 5.2-24.0, 4.94-15.59 및 0.10-0.75 mg L<SUP>-1</SUP> 범위이었으며, 연평균 처리효율은 BOD, SS,T-N 및 T-P가 각각 26, 43, 62 및 83%로서 BOD 처리효율은 낮았으나 T-N과 T-P 처리효율은 매우 높았다. 계절별 수처리 효율은 전반적으로 동절기에 비하여 하절기에 높았으며 T-P의 처리효율은 계절적인 차이 없이 비교적 일정하게 높은 처리효율을 보였다. 인공습지 구성시스템별 오염물질 부하량에 따른 오염물질 처리량은 BOD는 침강지> 습지조 > 마이크로폴, T-N과 SS는 습지조 > 침강지 >마이크로폴 순이었으며 T-P의 경우에는 습지 구성 시스템별 큰 차이 없이 비교적 일정한 처리량을 보였다. Boknae Bio-park is a free water surface constructed wetlands to remove non-point source pollution. Boknae Bio-park constructed wetlands (CWs) consist of forebay, wetlands (1<SUP>st</SUP>, 2<SUP>nd</SUP>, and 3<SUP>rd</SUP> wetlands), and micropool. The concentrations of BOD, SS, T-N and T-P in inflow were 1.87-4.23, 5.2-24.0, 4.94-15.59 and 0.10-0.75 mg L<SUP>-1</SUP> in Boknae Bio-park CWs from April to December in 2008, respectively. The removal rates of BOD, SS, T-N and T-P in Boknae Bio-park CWs were 26, 43, 62 and 83%, respectively. The removal rates of BOD and SS in the spring and summer were higher than those in other seasons. The removal rates of T-N and T-P on spring were slightly higher than those in other seasons. The amounts of pollutants removal in Boknae Bio-park CWs were higher in the order of forebay > wetlands > micropool for BOD, wetlands > forebay > micropool for SS and wetlands > forebay > micropool for T-N. The amount of T-P removal was not significant different in all areas.
Seo, In-Ae,Lee, Hyun-Kyoung,Shin, Yoon-Kyung,Lee, Sang-Hwa,Seo, Su-Yeong,Park, Ji-Wook,Park, Hwan-Tae The Korean Society of Pharmacology 2009 The Korean Journal of Physiology & Pharmacology Vol.13 No.2
The binding of interleukin-6 (IL-6) cytokine family ligands to the gp130 receptor complex activates the Janus kinase (JAK)/ signal transducer and activator of transcription 3 (STAT3) signal transduction pathway, where STA T3 plays an important role in cell survival and tumorigenesis. Constitutive activation of STAT3 has been frequently observed in many cancer tissues, and thus, blocking of the gp130 signaling pathway, at the JAK level, might be a useful therapeutic approach for the suppression of STAT3 activity, as anticancer therapy. AG490 is a tyrphostin tyrosine kinase inhibitor that has been extensively used for inhibiting JAK2 in vitro and in vivo. In this study, we demonstrate a novel mechanism associated with AG490 that inhibits the JAK/STAT3 pathway. AG490 induced downregulation of gp130, a common receptor for the IL-6 cytokine family compounds, but not JAK2 or STAT3, within three hours of exposure. The downregulation of gp130 was not caused by enhanced degradation of gp130 or by inhibition of mRNA transcription. It most likely occurred by translation inhibition of gp130 in association with phosphorylation of the eukaryotic initiation factor-2 a. The inhibition of protein synthesis of gp130 by AG490 led to immediate loss of mature gp130 in cell membranes, due to its short half-life, thereby resulting in reduction in the STAT3 response to IL-6. Taken together, these results suggest that AG490 blocks the STAT3 activation pathway via a novel pathway.
Seo-Yeong Park,Min Ju Kim,Siwon Yoo,Jin Woo Song,Jong Min Choi,Seo Hee Lee,In Hwan Kim,Ginnae Ahn 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
In this study, we prepared two enzymatic extracts by using trypsin and pepsin from Hermetia Illucens (THI and PHI), and evaluated their effects on photodamages in ultraviolet B (UVB)-irradiated human keratinocytes. The result showed PHI led to the higher extraction yield than THI, whereas the protein content of PHI was lower. Also both THI and PHI decreased the generation of intracellular reactive oxygen species (ROS) without the cytotoxicity at the used all concentrations in UVB-irradiated human keratinocytes. In particular, THI reduced the formation of apoptosis and the sub-G1 DNA content. In conclusion, we demonstrate that Hermetia Illucens enzymatic extracts suppress photo damages by inhibiting the oxidative stress of UVB-irradiated human keratinocytes. This research was supported by X-mind Corps program of National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT (No. 2019H1D8A1109673).