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작물재배 환경이 Arbuscular 내생균근 균의 상대밀도와 작물체의 인(P) 함량에 미치는 영향
이국한 ( Kook Han Lee ),안승원 ( Seoung Won Ann ),이창홍 ( Chang Hong Lee ),이인봉 ( In Bong Lee ),채수천 ( Soo Cheon Chae ),김혜영 ( Hye Young Kim ),김영칠 ( Young Chil Kim ) 한국환경과학회 2012 한국환경과학회지 Vol.21 No.5
Available phosphorus(P2O5) in conventionally cultivated soil was more abundant in two fold than that of organically cultivated soil. Relative density of Arbuscular Mycorrhizal Fungi (AMF) was higher in organically cultivated soil, That of welsh onion cultivated soil was the highest, that of strawberry was followed and then that of pepper, respectively. Relative density of AMF was inversely proportioned to available soil phosphorus. Phosphorus content of crop and relative density of AMF were more abundant in organically cultivated crop or soil. However available soil phosphorus content was much in conventionally cultivated soil. The phosphorus contents between soil and crop were negatively correlated. The phosphorus content of crop was increased as the relative density of AMF increased. Relative density of AMF in the organically cultivated soil and phosphorus content of the crop with organic cultivation were higher than those of conventionally cultivated.
비경작지와 경작지의 Arbuscular 내생균근균의 상대밀도에 관한 연구
김혜영 ( Hye Young Kim ),이국한 ( Kook Han Lee ),왕젠 ( Zhen Wang ),이창홍 ( Chang Hong Lee ),안승원 ( Seoung Won Ann ) 한국녹지환경디자인학회 2007 녹지환경학회지 Vol.3 No.1
The relative density of arbuscular mycorrhiza(AM) in uncultivated grass land and cultivated was investigated. The density of arbuscular mycorrhiza in reed(Phragmites communis) growing land was the highest and then that of in crabgrass(Digitaria sanguinalis), barnyard grass(Echinochloa crus-galli var. frumentace), and eulalia(Miscanthus sinensis var. purpurascens) were followed, in the order of numbers. In the cultivated land with use of chemical fertilizers and pesticides, that were arranged in the order of numbers from bean(Glycine max), sorghum(Sorghum bicolor), leek(Allium fistulosum), perilla(Perilla frutescens var. japonica), strawberry(Fragaria spp.), red pepper(Capsicum annuum) and rice(Oryzae sativa). In organically cultivated land without use any chemical fertilizers and pesticides more than five years, relative density were followed in the order of numbers from reek, perilla, strawberry, and red pepper. The AM density of uncultivated land was the highest then organically cultivated land and conventionally cultivated land were followed. Dominant AM species were different as the host plants were different. However the other species were also observed beside dominant species.
김명선 ( Myung Seon Kim ),채수천 ( Soo Cheon Chae ),안승원 ( Seoung Won Ann ),최원춘 ( Won Chun Choi ),이명원 ( Myung Won Lee ),이국한 ( Kook Han Lee ),류효명 ( Xiao Ming Liu ) 한국환경과학회 2012 한국환경과학회지 Vol.21 No.5
White light and compound light were found to be the ideal light sources for improving the functionality and ornamental value of indoor plants and reducing the cost of maintenance, but because compound light hinders people from recognizing the original color of plants and makes their eyes easily tired, white light was considered the optimal light satisfying all of the ornamental value, economic efficiency and functionality resulting from plant growth. On the other hand, in the results of examining physiological changes before and after treatment on fine dust PM10 and carbon dioxide removal capacity in a closed chamber under an artificial light source, the patterns of carbon dioxide and fine dust removal were similar among the treatment groups according to light condition, but according to plant type, the removal rate per unit leaf area was highest in Spathiphyllum and lowest in Dieffenbachia. In the experiment on dust and carbon dioxide removal, the photosynthetic rate was over 2 times higher after the treatment, and the rate increased particularly markedly under compound light and white light, suggesting that the photosynthetic rate of plants increases differently according to light quality. These results show that light quality has a significant effect on the photosynthetic rate of plants, and suggests that plants with a high photosynthetic rate also have a high carbon dioxide and dust removal capacity. In conclusion, the photosynthetic rate of foliage plants increased under white and blue light that affect photosynthesis and the increased photosynthetic rate reduced carbon dioxide and fine dust, and therefore white and compound light were found to be the optimal light sources most functional and economically efficient in improving ornamental value and indoor air quality.
EM 및 아미노산액비 시용이 "설향" 딸기 모주의 생육에 미치는 영향
안승원 ( Seoung Won Ann ),김영칠 ( Young Chil Kim ),강태주 ( Tae Ju Kang ),박갑순 ( Gab Soon Park ),이국한 ( Kook Han Lee ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.1
The dry weight of mother plants`` leaves had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) mixed with NS 0.8 (customary use). In seafood amino acid fertilizer (SAF) application, the increase rate was highest in SAF solution at a 300-fold dilution. Mother plants`` crown diameter, plant height, leaf length, leaf width, petiole length and leaf number showed the greatest growth amount when NS 0.8 (customary use) was mixed to NS (single-use) or NS+EM (mixed-use) solution. The growth was highest in SAF solution diluted 300 folds, but lowest in SAF solution diluted 100 folds. Of all inorganic nutrients, excluding sulfur, total amount of nitrogen, available phosphorus, potassium, calcium and magnesium had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) with the treatment of NS 0.8 (customary use). Total nitrogen, in particular, was increased by 3.1% in NS 0.4, 6.0% in NS 0.8, and 4.5% in NS 0.8 with the application of NS+EM at a 500-fold dilution compared to NS alone. Total nitrogen amount showed the highest increase rate in SAF solution diluted 300 folds. Total nitrogen, available phosphorus, calcium, magnesium and EC in soils applied with culture solutions (NS, NS+EM) had increasing tendencies after fertilizer application. The results were comparable to those of SAF treatment. The increase rate of each inorganic nutrient composition declined in soils applied with NS+EM solution diluted 500 folds compared to NS alone.
랫드에서 계피유래활성물질(CB-PH)의 경구투여에 의한 4주간 반복투여독성 시험
조현무(Hyun-Mu Jo),성낙원(Nak-Won Seong),제정환(Jung Hwan Che),박기대(Ki Dae Park),남기택(Ki Taek Nam),조완섭(Wan-Seob Cho),한범석(Beom Seok Han),양기화(Ki Hwa Yang),김방현(Bang Hyun Kim),이국경(Kook Kyung Lee),김형진(Hyoung-Chin Kim 한국독성학회 2003 Toxicological Research Vol.19 No.4
Although 'Cinnamon' has been widely used for the food and biophamacy in the world, it's toxicity was not screened completely. Major component of 'cinnamon' is CB-OH and CB-PH. CBPH has been reported to have antimutagenic effect. To investigate the toxicity of 2- o-Benzoylcinnamaldehyde (CB-PH), repeated dose (4 weeks) oral toxicity test performed in SD rats. Results of repeated dose oral toxicity tests for 4 weeks (CB-PH; 500, 1000, 2000 mg/kg/day) suggested that the CB-PH treated group showed no significant toxicological findings with body weights, organ weights, hematological and histopathological findings. Therefore, these data indicated that the maximum tolerated dose of CB-PH was 2000 mg above/kg/day in the rats.
임신 1/3분기에 태아 기형 진단을 위한 경복벽 배태아경술 6예
이국 ( Kook Lee ),김청미 ( Cheong Mee Kim ),서석교 ( Seok Kyo Seo ),조시현 ( Si Hyun Cho ),이현준 ( Hyun Jun Lee ),조한별 ( Han Byoul Cho ),채용현 ( Yong Hyun Chai ),이상희 ( Sang Hee Lee ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.12
목적 : 지속되는 임신에서 임신 1/3분기 배태아경술에 의한 조기 산전 진단의 효용성을 증명하고자 하였다. 연구 방법 : 태아의 외부 구조적 결손을 가진 중증 유전 증후군 기왕력 2예, 토순/구개파열을 가진 임신부 본인과 태아를 출산한 기왕력 각각 1예, 합지증과 다지증 각각 1예의 가족력을 가진 총 6예를 대상으로 초음파 유도 하에 임신 12(+6)-14(+6)주에 경복벽 배태아경술을 시행하였다. 직경 1㎜의 내시경을 자궁 내에 넣고 태아의 외부 구조 Objective : To demonstrate the efficacy of first trimester embryofetoscopy for prenatal diagnosis of congenital anomalies in continuing pregnancies. Methods : Under ultrasound guidance, six patients at 12(+6)-14(+6) weeks of gestation underwent endoscopic
박병주(Byung Joo Park),이국(Kook Lee),이병석(Byung Seok Lee),김정한(Jung Han Kim),박주현(Joo Hyun Park) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.1
Pregnancies consisting of complete hydatidiform mole with a coexisting fetus are relatively rare and associated with a risk of persistent gestational trophoblastic tumor. Recently, hydatidiform moles with a fetus have become more and more common due to utilization of induction agents for ovulation, and many clinicians have been confronted with the difficulty of determining whether to undergo immediate intervention or expectant management. However, there are limited data to guide the antenatal management of complete hydatidiform mole coexisting with a fetus. We experienced a case of complete hydatidiform mole with a coexistent live fetus, which was diagnosed by ultrasonography at 19 gestational weeks, showing a molar pattern and normal fetal structure, and confirmed normal karyotype of the coexistent fetus. Antenatal management was done with an additional serial check of β-hCG levels and blood pressure. The levels of serum β-hCG in serum level were progressively decreased after 19 gestational weeks and fell within normal range during advancing gestation. Pregnancy was terminated at 30 gestational weeks due to fetal hypoxia resulting from severe pre-eclampsia with a live small for gestational age infant. We report our case with a literature review to provide a guideline of management about complete hydatidiform mole with a coexisting fetus. Our result suggest that the pregnancy of complete mole with a coexisting live fetus may be allowed to continue when the fetal karyotype and development are normal and serum β-hCG titers are falling with advancing gestational age.
최은혁(Eun-Hyuck Choi),박광서(Kwang-Seo Park),최상태(Sang-Tae Choi),김이국(Lee-Kook Kim),윤병한(Bung-Han Yoon),이광식(Kwang-Sik Lee) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월
현재 전력설비에 사용되고 있는 SF? 가스는 절연 및 소호성능이 우수하고 회복특성이 뛰어나기 때문에 각종 전력기기의 절연매체로서 널리 사용되고 있다. 하지만 산업사회의 발달로 인하여 도시의 공간 활용의 효율성 측면에서 전력기기들의 소형화, 지중화 및 고 신뢰화가 시도되고 있으며, 또한 온실가스에 대한 규제로서 "도쿄 의정서"가 정식 발효됨에 따라 환경문제로 인하여 전력설비의 SF? 가스의 유출 최소화, 대체 절연물질 개발 등의 친환경 재료의 개발이 새롭게 대두되고 있다. 따라서, 본 연구에서는 SF?를 액화시켜 기존의 SF? 가스와 액체 SF?(LSF?)의 절연파괴특성을 측정 / 분석하여 SF?의 대체물질로 LSF?의 가능성을 검토하고, 혹한 지역에서 운용되고 있는 SF? 이용 전력설비의 온도저하에 따른 문제점을 구명하였다.