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농축산 폐기물 처리를 위한 저온내성 (低溫耐性) 메탄 생성균의 특성에 관한 연구 - 1. 저온조건에서 시료별 메탄 생성기작 연구 -
정광용,김재정 ( Kwang Yong Jung,Jai Joung Kim ) 한국환경농학회 1993 한국환경농학회지 Vol.12 No.1
The Study was conducted to develope the low temperature tolerant methane-producing bacteria(LTTB) and to increase the efficiency of anaerobic fermentation for the treatment of agricultural and livestock wastes at low temperature. The samples were collected from muddy soil, water logged sediment, organic layer and anaerobic sludge at three latitudes, 34.8~37.4 ˚N(Korea), 41.4 ˚N(USA) and 54.5~56.9 ˚N(Canada). They were used for determination of the methanogenesis rates for isolation and identification of the LTTB. The methanogenesis rate of smaples at low temperature were higher in the cellulose medium than methanol medium. The methanogeneses rate in the samples of subarctic region were 15~19 moles/ml during 30 days at low temperature(8 ℃), whereas not detected in the samples of temperate region. The methanogenesis rate in the enrichment culture of subarctic samples were inhibited by the 40 ㎍/ml of streptomycin + vancomycin or ampicillin + oleandomycin which were not effect to the methanogens. An inhabitation of high temperature tolerant methane producing bacteria was identified in the samples of temperate region, whereas that of the LTTB growing at 8~13℃ was identified in the subarctic region.
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농축산 폐기물 처리를 위한 저온내성 (低溫耐性) 메탄 생성균의 특성에 관한 연구 - Ⅱ. 저온내성 (低溫耐性) Clostridia 의 분리 -
정광용,김재정 ( Kwang Yong Jung,Jai Joung Kim,Lacy Daniels ) 한국환경농학회 1994 한국환경농학회지 Vol.13 No.3
This study was conducted to investigate the biochemical properties of isolated bacteria, low temperature tolerant methane-producing clostridia which were selected for using them as inoculum to anaerobic fermentation of agricultural and livestock wastes at low temperature. The results were; 1. Low temperature tolerant methane-producing clostridia were isolated from the samples which showed the high methanogenesis rate by enrichment culture at low temperature in cellulose medium. These clostridia, Clostridium botulinum SRC-64, Clostridium scatologens SRC-91 and Clostridium tyrobutyricum SRC-100, were isolated from swampy sediment at latitude 56.9。N, lake sediment IV at latitude 55.0。N, and tidal land soil II at latitude 37.0。N, respectively. The optimum growth temperature for these isolates was 37℃ and the minimum, around 10℃. They all had detectable amount of F_(420), specific coenzyme of methanogens. 2. As anaerobic fermentation products of glucose SRC-64 produced H₂, acetic, isovaleric and caproic acid, SRC-91 produced H₂, propionic, butyric, valeric, and caproic acid, and SRC-100 produced only acetic and propionic acid. The isolates were produced CH₂ ranged from 2.6 to 8.68 n moles/㎖ for 2 days at 13℃.
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농축산 폐기물 처리를 위한 저온내성 (低溫耐性) 메탄 생성균의 특성에 관한 연구 - Ⅲ. 저온내성 (低溫耐性) Methanogens 의 분리 - (
정광용,김재정 ( Kwang Yong Jung,Jai Joung Kim,Lacy Daniels ) 한국환경농학회 1996 한국환경농학회지 Vol.15 No.3
This study was conducted to investigate the biochemical properties of isolated bacteria, low temperature tolerant methanogens which were selected for use as inoculum for anaerobic fermentation of agricultural and livestock wasted at low temperature. The results, obtained were summarized as follows: Low temperature tolerant methanogens were isolated from the samples which showed the high methanogenesis rate by enrichment culture at low temperature in methanol medium. These methanogens, Methanobacterium M-251 and Methanobacterium M-253 were isolated from swampy sediment at latitude 56.9°, Methanosarcina mazei M-372 from lake sediment IV at latitude 55.0。N, and Methanobacterium formicicum M-375 from tidal land soil at latitude 37.0。N, respectively. The isolated anaerobic bacteria could not use sugars as carbon sources. The optimum pH value for the growth of M-251 and M-375 was 6.8, but those for M-253 and M-372 6.5 and 7.0, respectively. The minimum growth temperature of isolated, M-251 and M-253 were 8℃ and the optimum temperature 30℃, while the minimum of M-392 and M-395 were 13℃ and the optimum 37℃. The growth rate of isolates at 17.5℃ were lower by 32-50% than that of 30℃. The isolated Methanobacterium strains such as M-251, M-253, and M-375 have lower cell yield, 0.38-1.21g/1M CH₄than 1.14-1.51g/1M CH₄of Methanosarcina mazei M-372.
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골프 드라이버 스윙 시 Early Extension에 따른 임팩트 변화
소재무 ( Jae Moo So ),김용석 ( Yong Seok Kim ),김재정 ( Jae Jung Kim ),유광수 ( Kwang Soo Yoo ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.1
The purpose of this study is to validate that change of impact by the Early Extension in during a golf driver swing. 13 golf players who were diagnosed with symptoms of Early Extension participated in a proactive corrective training programs that took place 3 times a week for a 4 month period. Data was collected by recording 5 pre and 5 post training driver swings and analyzing the data to calculate the change in velocity and its effect in the shot used the TRACK MAN. After the training, the changes of early extension were -0.21 cm in backswing section E2(take away), -0.64 cm in E3(halfway backswing), and -0.94 cm in E4(backswing top). The downswing section changes were -1.34 cm in event E5(halfway downswing), -1.74 cm in E6(impact). Impact force increased and thus club speed increased by 6.32 km/h, ball speed increased by 10.94 km/h, max height decreased by -6.22 m, carry increased by 10.85 m, carry side(left deviation) decreased by 4.84 m, flight time by increased by 0.4 sec, and total length increased by 17.96 m while landing angle decreased by -7.74 deg.
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土性 및 pH差異가 湛水土壤의 메탄가스 生成에 미치는 影響
南相烈,金才正,鄭光溶 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.11 No.1
The effect of soil texture and pH on the behavior of anaerobic products in submerged soils, fatty acids and methane gas were studied. The study was done under anaerobically controlled system applied rice straw as carbon source at 30℃. 1. Methane formation was higher in the loamy soil compared to that obtained with sandy loam soil, in pH 7.0 compared to pH 4.5 and rice straw treatment enhanced the methane gas for-mation remarkably. 2. The Eh values were below -350 mV since 5 days after incuabtion in the treatment of pH 7.0 with rice straw, and in this condition methane content was about 65% and carbon dioxide 35%. 3. Acetic propionic, isobutyric, butyric, lactic isovaleric and valeric acid were detected during the incubation and acetic acid was accumulated in the large quantity under the condition that methane formation was inhibited. 4. The average methane formation rate during the incubation period was ranged from 0.0003 to 16.17 g/㎡/day which were depending on soil pH, Eh and organic material. 5. The conditions for inhibition of methane formation in submerged soil were low pH, low Eh and suppression of organic matter supply.
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