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Sohn, Young-Geol,Lee, Byung-Hyun,Kang, Kyu-Young,Lee, Jeung-Joo Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.
We investigated the physiological and biochemical bases for salt tolerance in two rice (Oryza sativa L.) cultivars --relatively salt-tolerant 'Dongjin' and salt-sensitive 'Kumnam'. Salinized hydroponic cultures were studied at the germination and seedling stages. NaCI inhibited germination more severely in 'Kumnam' than in 'Dongjin'. Increasing the salt concentration also deterred growth to a larger extent in the former. Moreover, the leaves of 'Kumnam' exhibited greater increases in lipid peroxidation and Na+ accumulation than those of 'Dongjin' under stress. The activities of constitutive and salt-induced superoxide dismutase (SOD, EC 1.15.1.1) and ascorbate peroxidase (AP, EC 1.11.1.11) were also higher in 'Kumnam', while only catalase (CAT, EC 1.11.1.6) activity was slightly higher in stressed plants of 'Dongjin'. The positive correlation between leaf proline levels and NaCI concentration was more evident in 'Kumnam'.However, 'Dongjin' seeds, which had higher germinability in the presence of NaCI, also contained more proline. These results suggest that the higher salt tolerance in 'Dongjin' seedlings could be ascribed to their lower NaCI accumulations in the leaves. The presumably is due to reductions in the uptake or transport rates of saline ions to the shoots from the roots. Finally, we believe that the higher germination rate by 'Dongjin' is caused by its higher seed proline content.
Impact of alcohol drinking on acetylcholine-induced coronary artery spasm in Korean populations
Sohn, Sung Min,Choi, Byoung Geol,Choi, Se Yeon,Byun, Jae Kyeong,Mashaly, Ahmed,Park, Yoonjee,Jang, Won Young,Kim, Woohyeun,Choi, Jah Yeon,Park, Eun Jin,Na, Jin Oh,Choi, Cheol Ung,Lim, Hong Euy,Kim, Eu Elsevier 2018 Atherosclerosis Vol.268 No.-
<P><B>Abstracts</B></P> <P><B>Background and aims</B></P> <P>Generally, immoderate alcohol consumption is associated with variant angina and accepted as one of the risk factors for coronary artery spasm (CAS), but evidence is lacking in this regard. The aim of this study is to evaluate the impact of alcohol consumption and drinking pattern on CAS by acetylcholine (ACH) provocation test and long-term clinical outcomes.</P> <P><B>Methods</B></P> <P>A total of 5491 patients with typical or atypical chest pain, without significant coronary artery disease, who underwent intracoronary ACH provocation test, were enrolled prospectively, and retrospectively analyzed in this study. They were divided into two groups according to their alcohol drinking status; the current alcohol (CA) drinking group (n = 1792), and non-CA group (n = 3699). To adjust for potential confounders, a propensity score matching (PSM) analysis was performed. The primary endpoint was incidence of CAS, and secondary endpoints were major adverse cardiac events (MACE) and recurrent angina requiring repeat coronary angiography (CAG) at 5 years.</P> <P><B>Results</B></P> <P>After PSM analysis, alcohol consumption was a strong risk factor for CAS. Furthermore, excessive alcohol consumption was correlated with a higher risk for CAS. As compared with the non-CA group, the CA group showed worse angiographic and clinical findings, including higher incidence of CAS (58% <I>vs.</I> 62%, <I>p</I> = 0.016), spontaneous spasm (17% <I>vs.</I> 22%, <I>p</I> = 0.004), multi-vessel spasm (31% <I>vs.</I> 37%, <I>p</I> = 0.009), proximal epicardial spasm (39% <I>vs.</I> 46%, <I>p</I> = 0.002), ischemic electrocardiography changes such as T-inversion (0.4% <I>vs.</I> 1.2%, <I>p</I> < 0.001) and chest pain (42% <I>vs.</I> 46%, <I>p</I> = 0.047) during ACH provocation test. However, the status and pattern of alcohol drinking had no influence on long-term clinical outcomes such as MACE or recurrent angina.</P> <P><B>Conclusions</B></P> <P>Alcohol consumption is a strong risk factor for CAS, and excessive alcohol consumption was correlated with a higher risk for CAS. Further well-designed studies are needed to confirm the results.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The aim of study is to evaluate the impact of alcohol consumption on coronary spasm (CAS) and long-term clinical outcomes. </LI> <LI> Alcohol consumption is a strong risk factor for CAS. </LI> <LI> Furthermore, excessive alcohol consumption was correlated with a higher risk for CAS. </LI> </UL> </P>
제지폐수처리용 생물고분자응집제를 생산하는 Bacillus sp. K-111의 배양특성조사
권기석,손용호,최선택,정석관,송숙희,김동걸 7개 국립대학교 환경연구 논문집 공동발행 위원회 2002 환경연구논문집 Vol.2 No.1
Flocculant-producing microorganisms were screened from obtained strains in the laboratory using a pulp-wastewater treatment as the flocculating agent. K-111 strain that had high flocculating activity among them was selected and identified as Bacillus sp. K-111 16s rDNA sequencing. The favorable medium for the production of flocculant was glucose 1.5%, NH_4NO_3 0.2%, tryptone 0.01%, K_2HPO_4 0.08%, KH_2PO_4 0.06%, CaCO_3 0.03%, MgSO_4·7H_2O 0.005%, MnSO_4 0.005% in 1 liter of D.W. at initial pH 7.0. The optimum culture temperature and pH were 30℃ and pH 7.0, respectively. the flocculating activity was observed most highly after 36 to 48 hr of cultivation at the optimum conditions. the flocculating activity of produced biopolymer on optimum conditions was about 2.5-fold higher than that of screening medium.
송전선로의 설비특성을 고려한 운영그룹 분류 및 최고허용온도
孫洪寬(Hong-Kwan Sohn),金秉杰(Byung-Geol Kim),朴寅杓(In-Pyo Park),安相炫(Sang-Hyun An),張太因(Tae-In Jang),崔鍾基(Jong-Kee Choi) 대한전기학회 2008 전기학회논문지 Vol.57 No.11
The thermal rating of a conductor are maximum continuous current capacity and short time emergency current capacity. The overload operation for a faults have an effect on a conductor lifetime. Its time duration and overload level are limited to facility conditions of transmission lines. The short time emergency current capacity in KOREA observe the KEPCO's DESIGN RULE 1210, but its rules are not included to concept of an allowable short time duration. This papers are described to the calculation concept of short time emergency current capacity considering a time duration and an overload level. And we suggested a operation grouping and its maximum conductor temperature considering facility conditions - conductor lifetime, stability of connection points, conductor height above ground and clearance, in the operating and new T/L.
시공유형에 따른 ACSR 480Rail 가공송전선 접속개소의 기계적 및 열적 특성 연구
안상현(Sang-hyun Ahn),김병걸(Byong-geol Kim),김상수(Sang-su Kim),손홍관(Hong-kwan Sohn),박인표(In-pyo Park) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
According to previous report, aged sleeves for old transmission lines have various defect such as biased installation or corrosion of steel sleeve. These defects occupied almost 50 percent of investigated aged sleeves. These defects can cause serious accidents such as rapid increasing of sag or falling out of overhead conductor from sleeves. Moreover, the defects have been limited power capacity of transmission line. This paper study on thermal behavior of ACSR 480Rail conductor and sleeve with various defect model. The detailed results were presented in the text.