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Study on phenotyping of rice for drought tolerance using hyper-spectral reflectance imagery
En-Su Park,Byoung Kwan Cho,Jin Won Kim,Do-Soon Kim 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
This study was conducted to provide basic data for high-throughput screening (HTS) system construction based on phenomics. Rice (Oryza sativa cv. Chucheongbyeo) seedlings in vegetative growth stage were grown in the glass house and treated with 0, 3.75, 7.5, 15, and 30% (w/v) of polyethylene glycol (PEG) to give osmotic stress. Three days after PEG treatment, hyper-spectral reflectance images were obtained and analyzed after removing background image in several steps. The reflectance of rice seedlings treated with 15 and 30% of PEG solutions were significantly different at 680 nm, where differences in the chlorophyll reflectance spectrum and visual symptoms were not observed. These results thus indicate that hyper-spectral reflectance observed at 680 nm can be used to screen drought tolerant rice lines. A HTS system equipped with this hyper-spectral reflectance system may play an important role of future rice breeding program.
광전자분광법을 이용한 희토류 부도체 화합물들의 전자구조 연구
조은진(En-Jin Cho),오세정(Se-Jung Oh) 한국진공학회(ASCT) 1996 Applied Science and Convergence Technology Vol.5 No.4
광전자분광 실험방법을 이용하여 희토류(Sm, Eu, Gd, 및 Tb) 화합물 부도체들의 희토류 원소의 3d와 4d 전자의 내각준위의 스펙트럼들을 연구했다. La₂O₃, Ce₂O₃ 등과 같은 가벼운 희토류 화합물 부도체의 경우와는 달리 Sm 이상의 무거운 희토류 화합물들의 경우는 란탄족 수축(lantanide contraction) 현상에 의한 희토류 원소의 f 전자와 음이온의 p 전자사이의 혼성의 크기가 줄어들면서 이 혼성에 의한 위성구조가 존재하지 않는 것을 알 수 있었다. 또한 Eu 부도체의 안정된 +3가의 화합물들에서 보이는 위성구조는 표면의 전자구조가 덩어리와는 다른 +2가의 전자가를 갖기 때문이라는 것을 밝혔다. 그리고 Eu 3d 전자의 내각준위의 주요 피크에 대하여 대략 10 eV보다 큰 결합에너지 영역에 존재하는 위성구조는 3d4f^6 전자구조의 여러겹 효과에 의한 것으로 추정된다. 이러한 여러겹 효과는 Gd 부도체 화합물에서도 역시 발견할 수 있는데, Gd 3d 전자의 내 각준위의 스펙트럼에의 위성구조는 3d4f^7 전자구조의 여러겹 효과에 의한 것이다. 모든 희토류 부도체 화합물들의 3d 전자의 내각준위의 스펙트럼에서 주요 피크에 대하여 대략 15 eV보다 큰 결합에너지 영역에서 보이는 위성구조는 플라즈몬을 생성해서 에너지를 잃는 과정에서 발생하는 것이다. The electronic structures of 3d and 4d core-levels of rare-earth atoms in the insulating rare-earth (Sm, Eu, Gd, and Tb) compounds were studied with x-ray photoelectron spectroscopy(XPS). It is shown that the intrinsic satellite structure due to the hybridization disappears for chemically stable trivalent heavy rare-earth insulating compounds as the hybridization between f electrons of rare-earth atoms and p electrons of anion atoms decreases due to the lanthanide contraction. Eu atoms at the surface of the the stable insulating trivalent Eu compounds are found to be divalent. The satellite peak of Eu 3d core-level spectra at about 10eV higher binding energy side relative the main peak comes from the multiplet structures due to 3d4t^6 configuration. Similar multiplet effects are also found in insulating Gd compounds, where the satellite peak of Gd 3d core-level spectra appears at about 10 eV higher binding energy side relative to the main peak due to the multiplet structures of 3d4f^7 configuration. The satellite structure appearing at about 15 eV higher binding energy side relative to the main peak in all insulating rare-earth compounds is due to an energy loss process of creating a plasmon.
조은진(En-Jin Cho),최일상(Ilsang Choi),이한길(Hangil Lee),황찬용(Chanyong Hwang) 한국진공학회(ASCT) 1997 Applied Science and Convergence Technology Vol.6 No.2
Pd 금속을 9 Å보다 많은 양을 Si 표면에 증착한 경우에 형성되는 Pd-실리사이드는 순수한 Pd 금속이 쌓이기 전단계인 Pd 양이 많은 Pd₃Si 상이다. 또한, Si 표면에 Pd 금속을 1Å 이상을 증착 하였을 때 형성되는 Pd-실리사이드는 Pd₂Si 상이다. 그리고, Si 표면에 Pd 금속을 1Å보다 작은 양을 증착한 Pd 3d 내각준위의 분광을 보면, Pd의 증착 두께가 얇아질수록 Pd 3d 내각준위의 반높이에서 반너비(half width at half maximum: HWHM)의 크기가 넓어진다. 매우 작은 양의 Pd 금속을 Si 표면에 증착한 경우에 반너비가 넓어진 이유는 많은 연구자들이 찾아낸 Pd-실리사이드인 Pd₂Si 상외에 Si 양이 많은 새로운 Pd-실리사이드인 PdSi 상이 존재하는 것 때문이다. If the thickness of Pd deposited is larger than 9 Å, its phase is Pd₃Si. This phase is followed by pure Pd phase with further deposition of Pd. Also, when the thickness of Pd deposited on top of Si(111) is larger than 1 Å, the phase of Pd-silicide formed is found to be Pd₂Si. The full width at half maximum of Pd 3d core-levels increases with decreasing of Pd film thickness at low coverages (≤0.5 Å). This is due to the formation of additional phase of Pd silicide, i.e. PdSi, in addition to Pd₂Si.
조현희 ( Hyun Hee Cho ),김미란 ( Mee Ran Kim ),황성진 ( Sung Jin Hwang ),김민정 ( Min Jung Kim ),김은중 ( En Jung Kim ),이진우 ( Jin Woo Lee ),김장흡 ( Jang Heub Kim ),김진홍 ( Jin Hong Kim ) 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.6
목적: 자궁탈출증 및 질말단부탈출증으로 꼬리뼈하 천골고정술을 시행받은 34명의 여성의 6개월 단기추적결과를 보고하고자 한다. 연구방법: 자궁탈출증 및 질말단부탈출증이 있는 여성 34명에서 꼬리뼈하 천골고정술을 시행하여 수술 중/ 수술 후 나타날 수 있는 합병증과 수술 6개월 뒤 재발 여부에 대해 추적검사를 실시하였다. 결과: 꼬리뼈하 천골고정술 후 혈색소의 변화는 1.7±0.9로 나타났으며, 도뇨관 유치기간은 3.1±1.0로 수술 후 평균 2.1일에 도뇨관을 제거하고 자가배뇨가 가능하였다. 입원기간은 5.2±1.0로 수술 후 평균 3.2일이면 퇴원이 가능하였다. 6개월 재발율은 2.9%였다. 수술 전 환자들의 자궁/질말단부 탈출증의 정도는 평균 2.7±0.7 (stage)였으며, 수술 후 6개월에 확인한 탈출증의 정도는 0.4±0.6 (stage)이었다. 결론: 꼬리뼈하 천골고정술은 자궁적출술 없이 효과적으로 자궁탈출증을 치료할 수 있는 방법이다. Objective: To investigate the short term results of infracoccygeal sacropexy for the management of uterine prolpase or stump prolapse. Methods: Thirty-four Women who underwent infracoccygeal sacropexy for the management of uterine prolapse or stump prolpase were enrolled this study. Intraoperative or postoperative complications and results of the operation were evaluated and the recurrence rate of pelvic organ prolapse was checked 6 months after operation. Results: Changes of hemoglobin after infracoccygeal sacropexy was 1.7±0.9, mean duration of bladder drainage was 3.1±1.0 (days). After 2.1 days of operation, foley catheter was removed. Mean inpatient day was 5.2±1.0, patient discharged 3.2 days after operation. Recurrence rate after 6 months was 2.9%. Preoperative mean stage of prolapse was 2.7±0.7 (stage) and it decreased to 0.4±0.6 (stage) 6 months after operation. Conclusions: Infracoccygeal sacropexy was effective method for the management of uterine/ stump prolapse.
Chin, Ho Jun,Cho, Hyun Jin,Lee, Tae Woo,Na, Ki Young,Oh, Kook Hwan,Joo, Kwon Wook,Yoon, Hyung Jin,Kim, Yon-Su,Ahn, Curie,Han, Jin Suk,Kim, Suhnggwon,Jeon, En Sil,Jin, Dong Chan,Kim, Yong-Lim,Park, Sun The Korean Academy of Medical Sciences 2009 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.24 No.suppl
<P>Oxidative stress plays various roles in the development and progression of IgA nephropathy, while bilirubin is known as a potent antioxidant. We therefore hypothesized that serum bilirubin would be associated with renal prognosis in IgA nephropathy. The study subjects comprised 1,458 adult patients with primary IgA nephropathy in Korea. We grouped patients according to the following quartile levels of bilirubin: <0.4 mg/dL (Q1), 0.4-0.5 mg/dL (Q2), 0.6-0.7 mg/dL (Q3), and >0.8 mg/dL (Q4). The outcome data were obtained from the Korean Registry of end-stage renal disease (ESRD). Eighty patients (5.5%) contracted ESRD during a mean follow-up period of 44.9 months. The ESRD incidences were 10.7% in Q1, 8.2% in Q2, 2.8% in Q3, and 2.8% in Q4 (<I>p</I><0.001). The relative risk of ESRD compared to that in Q1 was 0.307 (95% confidence interval [CI], 0.126-0.751) in Q3 and 0.315 (95% CI, 0.130-0.765) in Q4. The differences of ESRD incidence were greater in subgroups of males and of patients aged 35 yr or more, with serum albumin 4.0 g/dL or more, with normotension, with eGFR 60 mL/min/1.73 m<SUP>2</SUP> or more, and with proteinuria less then 3+ by dipstick test. In conclusion, higher bilirubin level was negatively associated with ESRD incidence in IgA nephropathy.</P>
Leaf temperature response of soybean (Glycine max) to saline stress
Jin Won Kim,Tae-Young Lee,En-Su Park,Byoung Kwan Cho,Do-Soon Kim 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
This study was conducted to investigate plant body temperature response of soybean (Glycine max) to saline stress. Two-weeks-old seedlings of soybean in V1 growth stage were treated with 0, 10, 20, 40, 80 and 160 mM of NaCl for salt stress. Thermal images acquired using Flir T-420 (US) were obtained at 4 days after treatment. Soybean leaf temperature increased with increasing NaCl concentration, resulting in significant positive correlation between soybean leaf temperature and stress intensity (P < 0.01). Leaf temperature of soybean was significantly different at 160 mM of NaCl, where no visual symptom was observed. Therefore, soybean leaf temperature can be used for evaluating the response of soybean to salt stress as a non-destructive and phenomic parameter. Non-destructive diagnosis of soybean leaf temperature may be a key parameter in a high throughput screening (HTS) system in breeding program for salt stress tolerance soybean cultivars.
Cha En Young,Park Jeong Soon,Jeon Sireong,Kong Jin Seon,Cho Yong Kee,Ryu Jee Youn,Park Youn Il,Park Young Shik The Microbiological Society of Korea 2005 The journal of microbiology Vol.43 No.2
In this study, we attempted to characterize the Synechococcus sp. pee 7942 mutant resultant from a disruption in the gene encoding UDP-glucose: tetrahydrobiopterin a-glucosyltransferase (BGluT). 2DPAGE followed by MALDI-TOF mass spectrometry revealed that phycocyanin rod linker protein 33K was one of the proteins expressed at lower level in the BGluT mutant. BGluT mutant cells were also determined to be more sensitive to high light stress. This is because photosynthetic O$_2$ exchange rates were significantly decreased, due to the reduced number of functional PSIs relative to the wild type cells. These results suggested that, in Synechococcus sp. pee 7942, BH4-glucoside might be involved in photosynthetic photoprotection.