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전낙근(Jeon Rak-Keun),이상효(Lee Sang-Hyo),김재준(Kim Jae-Jun) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.7
The change of housing demand can be judged from the fluctuation of Housing fund demand because construction market is more closely connected with financial market. Therefore the construction investment on buildings can be judged from the fluctuation of Housing fund demand because housing demand is closely connected with housing construction market. this paper attempts to analyze on the relation between housing fund demand and construction investment on buildings by using Vector Error Correction Model.
Rak Chun Seong(成樂春),Jai Sung Shim(沈載成),Keun Yong Park(朴根龍) 한국육종학회 1988 한국육종학회지 Vol.20 No.2
Germination and seedling elongation of three hybrids and their five inbreds of corn [Suwon 19 : KS 5 x KS 6, Hoengsongok : (KS 15 x KS 16) KS 5, and Jinjuok : (KS 15 x KS 16) Ga 209]were measured at two temperatures (15 and 30 C) and four polyethylene glycol (PEG) 10,000 solutions (0, 20, 30 and 35g/100gH₂o). Adjustments of PEG 10,000 solutions were based on water potentials of 0.0, -0.5, -1.1 and -1.5 MPa at room temperature. Observations were taken at 3, 6, 9 and 12 days for 15 C and 1, 2, 3 and 4 days for 30C. Fifteen seeds of each of three corn hybrids and their five inbreds were placed on Whatman No. 1(9cm) filter paper in plastic petridishes, and adjusted to 15 ml of the proper PEG 10,000 solution supplemented with 0.2 percent thiram using automatic syringe. The dishes were covered with cap. The seeds were germinated at a constant temperature of 15 or 30 C under dark conditions for programmed period. Seedling moisture content and seedling length of three corn hybrids and their five inbeds were decreased as PEG concentration increased both at 15 and 30C. Varietal differences in seedling moisture content and seedling length of corn were found among eight hybrids and inbreds at temperatures of 15 and 30 C. Mean seedling moisture content of inbred KS 16 showed the highest, and inbred KS 15 was observed the lowest among eight hybrids and inbreds. however, mean seedling lengths of three hybrids were greater than inbreds from 20 to 30g/100g water of PEG concentrations. Hybrid Jinjuok showed the greatest mean seeding length among three hybrids. The results of this study indicated that germination test of corn seeds in aqueous solutions of PEG has potential for screening corn genotypes for improved emergence at moisture stress.
온도, 종자수분 및 삼투처리가 대두의 발아와 묘신장에 미치는 영향
Rak Chun Seong,Harry C. Minor,Keun Yong Park 韓國作物學會 1987 한국작물학회지 Vol.32 No.1
삼투처리와 무처리의 대두종자(품종 :Williams)에 대하여 두가지 온도(15, 30℃ )에서 두가지의 종자수분함량(30%, 50%)으로 조절된 조건으로 0. 2, 4 및 8일간 전처리함에 있어서 시간별 세세구배치법 4반복으로 배치하여 발아와 묘신장을 조사하였던 바 주요결과는 다음과 같다. 1. 콩의 묘신장은 30에서 2일간 전처리함으로서 촉진되었으나 같은 온도에서 전처리기간이 길수록 억제되었다. 2. 삼투처리후 전처리된 종자는 수분흡수와 묘신장이 떨어졌다. 3. 종자수분함량이 50%로 조절된 뒤 전처리된 것은 체의 수분함량을 증가시켰으며 4일간까지의 전처리는 묘신장을 크게 하였다. 4. 묘의 건물중에서는 전처리온도가 30℃ 일때와 종자수분함량이 50%로 조절되어 8일간 전처리하였을 때 감소되었다. Germination and seedling length of soybean seeds (cultivar: Williams) with and without polyethylene glycol-8000 (PEG) treatments were measured following preconditioning at two temperatures (15 and 30~circC ) and two moisture levels 〔low (30 percent) and high (50 percent seed water content)〕 for 0, 2, 4, or 8 days. A split-split plot in time was used with four replications. Observations were made after two days of germination at 30~circC Seedling growth accelerated with two days of preconditioning at 30~circC , but was reduced as preconditioning duration increased up to eight days at the same temperature. PEG treated preconditioned seeds exhibited reduced moisture uptake and seedling growth. Preconditioning at a high moisture level increased seedling moisture content and also increased seedling length until four days of preconditioning duration. Seedling dry weight decreased when preconditioning temperature was 30~circC and when the high moisture level of preconditioning was continued for eight days.
온도·토양수분 포텐셜 및 삼투처리가 옥수수와 대두의 발아 및 묘신장에 미치는 영향
Rak Chun Seong,Harry C. Minor,Keun Yong Park 韓國作物學會 1986 Korean journal of crop science Vol.31 No.1
옥수수품종 (Dekalb XL 72B)과 대두품종 ( Willi -ams)의 발아와 묘신장을 두 온도, 세 토양수분 포텐셜 및 네 polyethylene glycol(PEG) 8,000 수준에서 측정하였다. 각 품종의 20처리종자를 0.2% Thiram에 처리하여 가비중 1.20으로 압축된 살균사양토에 2.0cm 깊이로 파종 분할구배치법 사반복으로 실시하였다. 1. PEG로 한 삼투처리는 고온에서나 저토양수분포텐셜 조건에서 효과가 거의 없었다. 2. 대두는 옥수수보다 높은 묘수분함량을 보였고 두 작물 모두 토양수분 포텐셜과 온도가 증가할수록 수분흡수가 증가되었다. 3. 옥수수의 묘장이 35℃ 에서는 대두보다 길었으나 15℃ 에서는 짧았다. 4. 옥수수의 건물중은 35℃ 에서 감소되었고 대두의 건물중은 토양수분 포텐셜이 증가할수록 감소되었다. Germination and seedling elongation of maize (Dekalb XL 72B), and soybeans (Williams) were measured at two temperatures (15 and 35~circC ), three soil water potentials (-1.50, -0.5, and -0.05 MPa), and four polyethy-lene glycol 8000 (PEG) levels (0, 20, 30, and 50 percent). Twenty conditioned seeds of each cultivar were treated with 0.2% thiram and planted 2 cm deep in sterilized Mexico silt loam soil which was subsequently compacted to a bulk density of 1.20 g/㎤. Seedling moisture content, dry weight, and length were measured for each treatment combination. Osmoconditioning with PEG showed little effect at high temperature or low soil water potential conditions. Soybeans had higher seedling moisture content than corn and both crops in-creased moisture uptake as soil water potential and temperature increased. Seedling length of corn was longer than soybeans at 35~circC but shorter at 15~circC . Seedling dry weight of corn decreased at 35~circC and that of soybeans decreased as soil water potential increased.
溫度 및 PEG 處理가 옥수수와 大豆 品種의 發芽 및 苗伸張에 미치는 影響
Rak Chun Seong,Jai Sung Shim,Keun Yong Park,Harry C. Minor 한국육종학회 1989 한국육종학회지 Vol.21 No.2
Germination and seedling growth of corn (Zea mays L. Vars. KS 16, KS 6, KS 15, Suwon 19, Ga 209. KS 5, Jinjuok, and Hoengsongok) and soybeans (Glycine max. (L.) Merr. Vars. Bangsakong, Hill, Danyupkong, Paldalkong, Baegwunkong, Kwangkyo, Hwangkeumkong, and Changyupkong) were measured at two temperatures (15 and 30 C) and ten polyethylene glycol (PEG) treatments. These PEG treatments were 20, 25 and 30g/100㎖ H₂O of PEG 6,000, PEG 10,000 and PEG 20,000 molecular weight (MW), including untreated control. Observations were taken at 4 days for treatments at 30 C and 12 days for those at 15 C. Twenty seeds of each variety of corn and soybeans were placed on Whatman No.1 (12cm) filter paper in glass petri-dishes, and adjusted to 20㎖ of the proper treatment solution supplemented with 0.2 percent thiram using automatic syringe. The dishes were covered with cap and sealed with parafilm. The seeds were germinated at a constant temperature of 15 or 30 C under dark conditions for programmed period. Seedling moisture content of corn was lower than that of soybeans both at 15 and 30 C. However, corn showed greater seedling length than soybeans at temperatures of 15 and 30 C. Seedling moisture content and seedling length of corn and soybeans were reduced as PEG concentration increased from 20 to 30g/100㎖ H₂O at PEG 6,000, PEG 10,000 and PEG 20,000. But no significant differences were found on seedling moisture content and seedling length of corn and soybeans among PEG 6,000, PEG 10,000 and PEG 20,000. Varietal differences in seedling moisture content and seedling length of eight corn and soybean varieties were observed with PEG treatments. Corn variety Jinjuok and soybean variety Paldalkong showed the greatest seedling length among eight varieties of corn and soybeans. The results of this study indicated that germination test of corn and soybean seeds in aqueous solutions of PEG 6,000, PEG 10,000 and PEG 20,000 showed similar for moisture stress simulation and has potential for screening varieties improved emergence ability during moisture stress.
低溫과 水分포텐셜이 紫雲英 蒐集種의 發芽와 苗伸長에 미치는 影響
Rak Chun Seong(成樂春),Keun Yong Park(朴根龍),Jae Yeung Cho(趙載英) 한국육종학회 1990 한국육종학회지 Vol.22 No.3
Germination and seedling growth of local collected chinese milkvetch (Astragalus sinicus L.) cultivars were measured at three temperatures (5, 10 and 15℃) and four polyethylene glycol(PEG) 10,000(MW) solutions(0, 10, 20 and 25g/100㎖ H₂O). Adjustments of PEG 10,000 solutions were based on water potentials of 0.0, -0.2, -0.5 and -0.8 MPa at room temperature. Observations were taken at 5, 7, 9 and 11 days for treatments at 15℃, 7, 11, 15 and 19 days for those at 10℃, and 9, 15, 21 and 27 days at 5℃. Germination rate of cultivar A of chinese milkvetch was higher than that of cultivars B at three temperatures and four PEG treatments. However, cultivar B showed greater seedling length than cultivar A at the temperatures and PEG treatments. The highest germination rate and seedling length of both cultivars were appeared at temperature of 10℃ among three temperatures. Germination rate and seedling length of both cultivars were reduced as PEG concentration increased from PEG 10 to 25g/100㎖ water. With concentration of PEG 20 and 25g/100㎖ water, germination rate and seedling length of both cultivars were the highest at 101C. Germination rate and seedling length of both cultivars of the cultivars was increased as temperature increased. The result of this study indicated that germination of chinese milkvetch seeds was affected more by moisture stress conditions than by low temperatures and required more moisture for adequate germination and seedling growth.
임상검체로부터 분리된 methicillin 내성 Staphylococcus aureus의 독소 및 항생제 내성
Keun Sik Baik(백근식),Gwang Seo Ki(기광서),Han Na Choe(최한나),Seong Chan Park(박성찬),Eun Cho Koh(고은초),Hyung Rak Kim(김형락),Chi Nam Seong(성치남) 한국생명과학회 2011 생명과학회지 Vol.21 No.2
2009년 7월부터 12월까지 순천 소재 한 병원에 내원한 환자의 검체로부터 methicillin 내성 Staphylococcus aureus(MRSA) 75균주와 methicillin 감수성 S. aureus (MSSA) 24균주를 분리하였다. 분리균의 항생제 감수성 조사는 디스크 확산법을 사용하여 측정하였다. 분리균의 독소 유전자 보유는 multiplex PCR을 이용하여 장독소(enterotoxin; SE), 독성 쇼크 증상 독소 1(toxic shock syndrome toxin-1; TSST-1), 피부박탈성 독소(exfoliative toxin; ET) 및 백혈구 용해 독소(Panton-Valentine leukocidin; PVL) 유전자를 검출하였다. 분리된 MRSA 60개 균주는 1개 혹은 2개의 독소 유전자를 가지고 있으며, 22.7%의 균주가 seb, sec, seg, sei와 tst 유전자를 동시에 보유하고 있었으며 18.7%는 sec, seg, sei와 tst 유전자를 동시에 보유하고 있었다. 백혈구 용해독소를 암호하는 pvl 유전자는 검출되지 않았다. MRSA는 sec, seg, sei와 tst 유전자 보유에 높은 상관성을 보였다. MRSA 균주들은 erythromycin(분리균의 89%), gentamicin (70.7%), ciprofloxacin (69.3%), clindamycin (61.3%)과 tetracycline (58.7%)에 내성이 높은 반면, MSSA 균주들은 erythromycin를 제외한 다른 항생제에는 민감하였다. 독소 유전자 seb, sec와 tst는 tetracycline 내성과 높은 상관관계가 있었다. Seventy five methicillin- resistant Staphylococcus aureus (MRSA) strains and 24 methicillin- susceptible S. aureus (MSSA) were isolated from clinical specimens obtained from a hospital in Suncheon, Jeonnam province, Korea, from July to December, 2009. Antibiotic resistance was determined using the disc diffusion method. Genes encoding enterotoxin (SE), toxic shock syndrome toxin-1 (TSST-1), exfoliative toxin (ET) and Panton-Valentine leukocidin (PVL) were detected by multiplex PCR-mediated amplification using specific primers. Sixty (80%) MRSA isolates possessed either one or more toxin genes and the most common pattern that coexisted in MRSA was seb, sec, seg, sei and tst (22.7%) followed by coexistence of sec, seg, sei and tst genes (18.7%). Gene pvl encoding leukocidin was not found. Significant correlation between the production of sec, seg, sei and tst genes was found. MRSAs were resistant to erythromycin (89% of the isolates), gentamicin (70.7%), ciprofloxacin (69.3%), clindamycin (61.3%) and tetracycline (58.7%), while MSSAs were susceptible to the antibiotics with the exception of erythromycin. Toxin genes seb, sec and tst were related to the tetracycline resistance of MRSA.