http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유류오염 토양 내 석유계 탄화수소 화합물의 분해에 대한 퇴비의 시용 효과
김성은 ( Sung Un Kim ),김용균 ( Yong Gyun Kim ),이상몽 ( Sang Mong Lee ),박현철 ( Hyean Cheal Park ),김근기 ( Keun Ki Kim ),손홍주 ( Hong Joo Son ),노용동 ( Yong Dong Noh ),홍창오 ( Chang Oh Hong ) 한국환경농학회 2015 한국환경농학회지 Vol.34 No.4
BACKGROUND: Petroleum-contaminated soil from leaking above- and underground storage tanks and spillage during transport of petroleum products is widespread environmental problem in recent years. Application of compost may be the most promising, cost-effective, and eco-friendly technology for soil bioremediation because of its advantages over physical and chemical technology. The objective of this study was to evaluate effect of compost application on degradation of total petroleum hydrocarbon (TPH) in petroleum hydrocarbon-contaminated soil.METHOD AND RESULTS: An arable soil was artificially contaminated by diesel, and compost was applied at the different rate of 0, 10, 30, and 50 Mg/ha. Concentration of TPH in the soil decreased as application rate of compost increased. Degradation efficiency was highest at compost 30 Mg/ha; however, it slightly decreased with compost 50 Mg/ha. Kinetic modeling was performed to estimate the rates of chemical reaction. The correlation coefficient (R2) values for the linear plots using the second-order model were higher than those using the first-oder model. Compost 30 and 50 Mg/ha had the fastest TPH degradation rate in the second-order model. Change of microbial population in soil with compost application was similar to that of TPH.Microbial population in the soil increased as application rate of compost increased. Increasing microbial population in the contaminated soil corresponded to decreased in TPH concentration.CONCLUSION: Conclusively, compost application for soil bioremediation could be an effective response to petroleum hydrocarbon-contaminated soil. The increase in microbial population with compost suggested that compost application at an optimum rate might enhance degradation of TPH in soil.
Mutant Recombinant Hemoglobin (α96Val→Tyr) Exhibits Low Oxygen Affinity and High Cooperativity
Kim, Hyun-Won,Choi, Jong-Whan,Yeh, Byung-Il,Han, Dong-Pyou,Lee, Hyean-Woo,Sohn, Joon Hyung,Jung, Seunho The Korea Science and Technology Center 1998 BMB Reports Vol.31 No.6
To investigate conformational information of a low oxygen affinity recombinant hemoglobin (rHb) containing 96Val->Trp mutation at the α96 position, we have produced rHb (α96vAL->Phe) and rHb (α96vAL->Tyr), using the Escherichia coli expression system and site-directed mutagenesis. The oxygen affinity of rHb (α96Val->Phe) is similar to that of human normal adult hemoglobin (Hb A). However, the oxygen affinity of rHb (α96Val->Tyr) showed much lower oxygen affinity than Hb A which is similar to that of rHb (α96Val->Trp), providing an opportunity as a potential candidate for a hemoglobin-based blood substitute. Both rHb (α96Val->Phe) and rHb (α96Val->Tyr) showed high cooperativity in oxygen binding. ¹H-NMR spectroscopy shows that both rHb (α96Val->Phe) and rHb (α96Val->Tyr) have very similar tertiary structure around the heme pockets and quaternary structure in the α₁β₁subunit interface compared to Hb A. The low oxygen affinity of rHb (α96Val->Tyr) has been suggested to be due to a hydrogen bond caused by an extra hydroxyl group and not present in rHb (α96Val->Phe). However, investigation of the carbonmonoxy form of rHb (α96Val->Phe) and (α96Val->Tyr) in the presence of inositol hexaphosphate at low temperature suggests that low oxygen affinity of (α96Val->Tyr) may arise from a mechanism different to that of rHb (α96Val->Trp).
Kim, Hyun-Won,Yeh, Byung-Il,Choi, Jong-Whan,Sohn, Joon Hyung,Lee, Hyean-Woo,Han, Dong-Pyou,Jung, Seunho The Korea Science and Technology Center 1998 BMB Reports Vol.31 No.6
X-ray crystallograhic studies of the deoxy form of human adult hemoglobin (Hb A) have shown that β99Asp is hydrogen bonded to both α42Tyr and α97Asn in the α₁β₂subunit interface, suggesting that the essential role of β99Asp is to stabilize the deoxy-Hb by creating the intersubunit hydrogen bond. In particular, for Hb Kempsy (β99Asp->Asn), molecular dynamics simulation indicated that a new hydrogen bond involving β99Asn can be induced by replacing α42Tyr with a strong hydrogen-bond acceptor such as Asp. Designed mutant recombinant (r) Hb (β99Asp->Asn, α42Tyr->Asp) have been produced in the Escherichia coli expression system and have shown that functional defects of Hb Kempsey could be compensated by the α42Tyr-> Asp substitution. However, as the α42Tyr->Asp mutation has never been reported before, it is still possible that the functional properties of r Hb (β99Asp->Asn, α42Tyr->Asp) may be due to the mutation itself. Thus, it s required to produce r Hb (α42Tyr->Asp) and r Hb Kempsey(β99Asp->Asn) as controls, and to compare their properties with those of r Hb (β99Asp->Asn, α42Tyr->Asp). r Hb (α42Tyr->Asp) could not be purified because it is an unstable hemoglobin which forms Heinz bodies. r Hb KempseyZ(β99Asp->Asn) exhibits very high oxygen affinity and greatly reduced cooperativity. Thus, r Hb (β99Asp->Asn) and r Hb (α42Tyr-> Asp) compensate each other.
김동욱,김현위,이병우,정창기,박기문,성하진,최춘언 한국산업미생물학회 1990 한국미생물·생명공학회지 Vol.18 No.2
사과향과 유사한 방향을 내는 미생물이 sludge로부터 분리되어 Geotrichum sp.로 동정되었다. 사과향 생성을 위한 아미노산으로는 leucine과 phenylalanine의 100:1 혼합물(1.5g/l)이 제일 좋았고 최적 ethyl alcohol 농도는 0.5-1.0%(v/v)이었다. Shaker에서 300㎖ 진탕 flask 속에 100㎖씩 배양시 200rpm, 2%(v/v) 접종상태에서 최적 사과향 생성조건은 배양온도 26℃, 배양시간 18시간, 초기 pH4.0이었다. Air 출구에 charcoal trap이 설치된 jar-fermentor(working volume, 3l:culture temp., 26℃; agitation speed, 400rpm; aeration rate, 3l/min: inoculum, 60㎖)로 36시간 발효시켜 aroma 화합물을 charcoal에 흡착시킨 후, propylene glycol(1,2-propanediol)을 사용해 수증기증류하여 얻은 증류액을 diethylether: n-pentane(2:1, v/v) 혼합용매로 추출하여 GC 및 GC-MS로 분석, 동정한 결과 leucine, phenylalanine으로부터 생성된 3-methylbutyl alcohol, phenethyl alcohol 및 2-hexen-l-ol 등을 비롯한 알콜류와 이러한 알콜류의 ester들, 그리고 ethyl alcohol로부터 유래된 여러 ester 화합물이 주된 aroma 구성성분인 것으로 밝혀졌다. A strain producing apple-like aroma was isolated from sludge and identified as Geotrichum sp. Optimum culture conditions for the aroma production were investigated and the major aroma components were identified by GS and GC-MS. The ratio of leucine to phenylalanine was 100:1(1.5 g/l) and ethanol concentration was 0.5-1.0%(v/v). The best aroma quality was obtained at 26℃ and pH 4.0. Major aroma compounds were alcohols including 3-methylbutyl alcohol, phenetyl alcohol, 2-hexene-l-ol and their esters, and esters originated from ethyl alchol.
인공 배양토 종류가 봉의꼬리, 도깨비고비, 부싯깃고사리의 생육에 미치는 영향
유동림(Yoo, Dong-Lim),이현숙(Lee, Hyean-Suk),남춘우(Nam, Chun-Woo),김수정(Kim, Soo-Jeong),서종택(Suh, Jong-Taek) 한국자원식물학회 2006 한국자원식물학회지 Vol.19 No.4
봉의꼬리에 있어서 생육은 일반상토인 모래: 마사토 : 부엽토(2:5:3)와 피트모스 : 이끼(5:5) 조합에서 많았으므로 인공상토로는 피트모스에 이끼를 덮은 조합이 유리한 것으로 나타났다. 도깨비고비의 경우에는 전체적으로 배양토 적응성이 높게 나타났으며 역시 피트모스 : 펄라이트(7:3) 조합에서 생육량이 가장 많았다. 그러나 바크와 톱밥이 들어간 배양토에서는 생육이 저조하였다. 부싯깃고사리의 경우 초장과 엽수의 생육으로 볼 때 모래 : 마사토 : 부엽(2:5:3) 조합이 가장 크고 많았으며 그 다음이 피트모스 : 펄라이트(7:3, 5:5) 조합 순이었다. The effects of culture soil combinations on growth of native pteridophyte (Pteris multifida, Cyrtomium falcatum and Cheilanthes argentea) were investigated in this study. Six different culture soil mixtures used for cultivating the pteridophytes under 30% shading condition. Pteris multifida was showed the most growth at the culture soil mixtures of peatmoss : living moss (5 : 5), and peatmoss : perlite (7 : 3). Cyrtomium falcatum and Cheilanthes argentea showed the best growth in the culture soils mixtures of sand : soil : leaf mold (2 : 5 : 3) and peatmoss : perlite (7 : 3, 5 : 5), respectively.
토양반응(pH)이 분화재배 기린초의 생육에 미치는 영향
유동림(Yoo, Dong-Lim),이현숙(Lee, Hyean-Suk),남춘우(Nam, Chun-Woo),김수정(Kim, Soo-Jeong),서종택(Suh, Jong-Taek) 한국자원식물학회 2006 한국자원식물학회지 Vol.19 No.4
기린초의 토양 pH별 생육특성을 보면 pH가 낮을수록 생육초기부터 후기까지 초장, 엽수, 분지수 등의 생육이 좋았으며 특히 초장과 분지수에서는 pH처리에 따라 통계적인 유의성이 인정되었다. 따라서 기린초 재배시에는 토양 pH를 4.5~5.0정도로 맞추어 주는 것이 pH 6.0보다 초기 활착이 빠르고 생육이 양호하며 균일성이 높아지는 것으로 나타났다. This experiment was carried out to find out proper culture soil for the flowerpot cultivation of Sedum kamtschaticum. Peatmoss was used for the culture soil. pH of the culture soils were adjusted to 4.5, 5.0, 5.5 and 6.0 using calcium hydroxide. Young plants of Sedum kamtschaticum were planted in the pots of 10cm in diameter. The experiment was conducted by the completely randomized design with 3 replications. Growth characteristics were investigated at intervals of 30 days after planting. As the pH of culture soil is lower, growth of Sedum kamtschaticum showed longer plant height and more number of leaves and branches. pH 4.5 to 5.0 appeared to be optimum range as soil reaction of Sedum kamtschaticum cultivation.