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부순모래를 활용한 모르타르의 기초물성에 관한 실험적 연구
박종호 ( Jong-ho Park ),문형재 ( Hyung-jae Moon ),나철성 ( Chul-sung Na ),최세진 ( Se-jin Chio ),이성연 ( Sung-yun Lee ),김무한 ( Moo-han Kim ) 한국건축시공학회 2005 한국건축시공학회 학술발표대회 논문집 Vol.5 No.1
Recently, Trouble of sand supply is occurred according to exhaustion of natural sand resources. Therefore, various measures are proposed for solution of trouble of sand supply and crushed sand among measures is used as one of most universal measures. But crushed sand which have poor particle shape and plenty of makes micro particle the quality of concrete deteriorated. Therefore, this study evaluated physical properties of mortar using crushed sand and applied evaluation result to fundamental data The result of this study have shown that quality of mortar using crushed sand independently is poor against general mortar. but, mortar flow and compressive strength is in creased in case of using crushed sand according to mixing ratio properly.
질소로 희석된 프로판 동축류 층류 제트 부상화염에서 열손실에 의한 자기진동에 대한 동축류 속도 효과
이원준(Won June Lee),윤성환(Sung Hwan Yoon),박정(Jeong Park),권오붕(Oh Boong Kwon),박종호(Jong ho Park),김태형(Tae hyung Kim) 한국연소학회 2012 한국연소학회지 Vol.17 No.1
Laminar lifted propane coflow-jet flames diluted with nitrogen were experimentally investigated to determine heat-loss-related self-excitation regimes in the flame stability map and elucidate the individual flame characteristics. There exists a critical lift-off height over which flame-stabilizing effect becomes minor, thereby causing a normal heat-loss-induced self-excitation with O(0.01 Hz). Air-coflowing can suppress the normal heat-loss-induced self-excitation through increase of a Peclet number; meanwhile it can enhance the normal heat-loss-induced self-excitation through reducing fuel concentration gradient and thereby decreasing the reaction rate of trailing diffusion flame. Below the critical lift-off height. the effect of flame stabilization is superior, leading to a coflow-modulated heat-loss-induced self-excitation with O(0.001 Hz). Over the critical lift-off height, the effect of reducing fuel concentration gradient is pronounced, so that the normal heat-loss-induced self-excitation is restored. A newly found prompt self-excitation, observed prior to a heat-loss-induced flame blowout, is discussed. Heat-loss-related self-excitations, obtained laminar lifted propane coflow-jet flames diluted with nitrogen, were characterized by the functional dependency of Strouhal number on related parameters. The critical lift-off height was also reasonably characterized by Peclet number and fuel mole fraction.
이상형,이준상,전항배,박종호 ( Sang Hyung Lee,Jun Sang Lee,Hang Bae Jun,Jong Ho Park ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.4
In this research, an wasted washing machine was remanufactured to a sequencing batch reactor(SBR) and investigated for treating swine wastewater with it. This SBR system was operated for removing COD, ammonia, and suspended solid, that were the major pollutants in animal wastewater. Aerobic and anoxic conditions after FILL were applied intermittently for effective removal of nitrogen. SETTLE and DRAW modes were followed by the complete aerobic and anoxic REACT. The total volume of the SBR was 75 liters, while the working volume in a cycle was 35 liters. When the final operating strategy of the SBR was FILL/REACT/SETTLE/DRAW of 0.5/10/1/0.5 hr, the removal efficiencies of TCOD_(Cr), NH₄-N, and T-N were 95, 98, and 85%, respectively. Finally, this SBR system can handle 10(based on 70㎏) pigs effectively.
저장기간 및 저장온도에 따른 미생물농약 및 친환경 유기농자재 유효미생물의 밀도변동
김용기(Yong-Ki Kim),홍성준(Sung-Jun Hong),지형진(Hyung-Jin Jee),심창기(Chang-Kee Shim),박종호(Jong-Ho Park),한은정(Eun-Jung Han),안난희(Nan-Hee An),이승돈(Seong-Don Lee),유재홍(Jae-Hong Yoo) 한국농약과학회 2011 농약과학회지 Vol.15 No.1
To work out quality control methods of environmental-friendly organic materials (EFOMs), the reason and basis for EFOM-selection and farmer's favorite formulation type of EFOMs, etc were investigated on farmers who had been practicing environmental-friendly agriculture. EFOMs used were soil amendments, control agents of plant diseases and insect pests, plant growth promotion formulations, in turns. In EFOMs application time, 22.7% of farmers sprayed EFOMs without delay after they were bought, in other hand, 77.3% of farmers used EFOMs which had been bought and stored for some period. Microbial density on seventeen environmental-friendly microbial formulates (EFMFs) including microbial pesticides, a microbial fertilizer, and environmental-friendly organic materials was investigated at different storing temperature and shelf life. When the microbial density of EFMFs was investigated without delay after they were bought, all used microbial pesticides and a microbial fertilizer was confirmed to be optimal for the certified density but two of environmental-friendly organic materials was confirmed not to be optimal. When microbial density of 17 EFMFs were investigated after storing them for six months at 4 ℃, only one of 9 microbial pesticides was confirmed not to be optimal, the other hand four of seven environmental-friendly organic materials not to be optimal, which each of their microbial density was less than the certified density. Population dynamics of microbial agents was much more influenced in fluctuated temperature (room temperature) than in static temperature condition (5℃ and 25℃). Shelf life of microbial agents according to microbial formulation type were high in granule type, liquid wettable type and liquid type in turns.
Pantoea agglomerans S59-4를 이용한 마늘 푸른곰팡이병의 생물학적 방제
김용기(Yong-Ki Kim),홍성준(Sung-Jun Hong),지형진(Hyung Jin Jee),박종호(Jong-Ho Park),한은정(Eun-Jung Han),박경석(Kyung-Seok Park),이상엽(Sang-Yeob Lee),이승돈(Seong-Don Lee) 한국농약과학회 2010 농약과학회지 Vol.14 No.2
S59-4 isolate was evaluated as a potential biocontrol agent using in vivo wounded garlic bulb assay. When the spore suspension (10? spores/㎖) of Penicillium hirsutum was co-inoculated with cell suspension of S59-4 isolate on wounded garlics, the isolate showed high suppressive effect to disease development. The isolate was identified as Pantoea agglomerans S59-4(Pa59-4) through Biolog system. Furthermore, soaking garlic bulbs in the suspension of Pa59-4 significantly reduced garlic decay caused by P. hirsutum. The optimal concentration of Pa59-4 for controlling garlic blue mold was 10?~10? cfu/㎖. And suppressive effect of Pa59-4 on garlic storage decay reduced as inoculation concentration of Penicillium hirsutum increased. In addition in order to investigate population dynamics of Pa59-4 on application site of garlic cloves, two antibiotic markers, pimaricin and vancomycin were selected. Bacterial density of Pa59-4 on the wounded garlic cloves increased continuously both under room temperature condition and low temperature condition until 30days after application of Pa59-4, meanwhile that of Pa59-4 on intact garlic cloves increased until 15days after application of Pa59-4 and thereafter decreased continuously. Two culture media for mass-production of Pa59-4, LB medium and TSB medium, were selected. By-product of bio-fungicide formulated by mixing white carbon and bacterial suspension of Pa59-4 suppressed by 40 to 50% garlic blue mold. Above results suggest that Pa59-4 be a promising control agent against garlic blue mold.
담배가루이(Bemisia tabaci) 병원성곰팡이 Lecanicijjium lecanii Btab0l 균주의 특성
윤여준,유용만,이민호,한은정,홍성준,안난희,김용기,지형진,박종호,Yoon, Yeo-Jun,Yu, Yong-Man,Lee, Min-Ho,Han, Eun-Jung,Hong, Sung-Jun,Ahn, Nan-Hee,Kim, Yong-Ki,Jee, Hyung-Jin,Park, Jong-Ho 한국응용곤충학회 2010 한국응용곤충학회지 Vol.49 No.4
국내에 문제가 되는 담배가루이(Bemisia tabaci)의 살충성 Lecanicillium lecanii Btab01 균주의 생육 특성과 살충력을 검정하였다. PDA, TSA, SDA+Y배지에서 L. lecanii Btab01은 $20{\sim}25^{\circ}C$에서 균사성장이 가장 빨랐으며 $28^{\circ}C$이상에서 성장이 억제되었다. L. lecanii Btab01는 고체배양과 액체배양 시 담배가루이 약충에 대해 살충률에 큰 차이를 보이지는 않았다(93.9%, 98.3%). 농도별로는 $10^5$, $10^6$, $10^7$, $10^8$ cfu/ml에서 각각 5.8%, 33.8%, 77.3%, 98.5%의 살충률을 보였고 각각 16.1일, 7.3일, 5.1일, 3.5일의 $LT_{50}$값을 나타내었다. L. lecanii Btab01을 약충에 처리 후 포화습도 조건을 0 시간 24 시간, 168 시간 유지하였을 때, 0%, 20.3%, 100%의 살충률을 보였다. 균주에 0.5% 식용유를 첨가하였을 때 포자의 발아가 2 배 가량 증가하였으며 균주에 0.1% 식용유를 첨가하여 약충에 처리했을 때(98.6%)가 첨가하지 않았을 때(79.9%)보다 살충력이 향상됨을 알 수 있었다. Cultural characteristics Lecanicillium lecani Btab01 and its insecticidal activity against tobacco whitefly (Bemisia tabaci) were investigated. On potato dextrose agar, tryptic soy agar and SDA+Y media, mycelial growth of L. lecani Btab01 was best at $20{\sim}25^{\circ}C$ and suppressed above $28^{\circ}C$. Both solid culture and liquid culture of L. lecani Btab01 showed high insecticidal activity, 93.9 and 98.3% respectively, against nymph of tobacco whitefly, but there is no significant difference. When culture of L. lecani Btab01 was treated at the concentration of $10^5$, $10^6$, $10^7$ and $10^8$ cfu/ml, their insecticidal activity were 5.8%, 33.8%, 77.3% and 98.5% respectively, and $LT_{50}$ values were 16.1 days, 7.3 days, 5.1 days and 3.5 days respectively. When nymphs were treated by the cultures of L. lecani Btab01 and maintained under saturated condition for zero hour, 24 hours and 168 hours, their control activities were 0%, 20.3% and 100% respectively. Spore germination of L. lecani Btab01 was increased about two times by adding edible oil. When L. lecani Btab01 was treated to control nymph with 0.1% edible oil, it showed high control activity(98.6%) compared to single treatment of L. lecani Btab01 (79.9%).