http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Eunil Lee,Seungil Nam 한국지질과학협의회 2004 Geosciences Journal Vol.8 No.1
Low sea surface salinity event in the East Sea during the LGM (last glacial maximum) has been critically and thoroughly reviewed based on previous studies, but freshwater source for this low paleosalinity still remains to a great extent questionable. This paper presents that the Korea Strait was partially open during the LGM, transporting the paleo-Water (0.5-2.1×1012 m3/yr) to the East Sea. The paleo-Water, presumably a mixture of high amount of freshwater and the paleo-Tsushima Current, might not be enough to explain the decrease of sea surface salinity (SSS) in the surface layer (79.75×1012 m3) of the LGM East Sea. Assuming that the paleo-Water is entire freshwater, it could only lower less than 1.1‰ of surface salinity. Moreover, differences in SSS (between 20‰ of the LGM and the present 34‰ in the East Sea) and planktonic foraminiferal d18O (between the regional East Sea and the global Pacific Ocean during the LGM) are approximately 14‰ and 3.8-4.1‰, respectively. According to general trend that 1‰ salinity decrease correponds to about 0.5‰ lowering of d18O (Broecker, 1989), 3.8-4.1‰ decrease in d18O could lower 7.6-8.2‰ in salinity, resulting in 25.8-26.4‰ of the SSS in the LGM East Sea. This SSS (25.8-26.4‰) is still much saline than 20‰. Furthermore, about 5.8-6.4‰ of salinity difference needs to be explained, and further indicates freshwater dilution in the LGM East Sea. Therefore, these semi-quantitative calculations evidence additional freshwater supply to the East Sea, lowering sea surface salinity during the LGM. Potentially additional source for freshwater might have been the Amur River inflow into the East Sea.
Eunil Won 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.2
Recent results in rare B decays are presented. Topics include purely leptonic, radiative, and b to sl+lက decays. Results are based on e+eက annihilation data collected with the BaBar detector at the (4S) resonance during the years 1999-2002 at the PEP-II asymmetric-energy B factory at SLAC.
( Eunil Cho ),( Qiyong Xu ),( Danling Xia ),( Jae Hac Ko ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.4
One of the significant challenges of food waste anaerobic digestion (AD) is the negative effect of high NaCl concentrations. This study investigated the effects of NaCl fluctuation on the methane generation of food waste AD under thermophilic and mesophilic conditions. Particularly, the effects of the shock loading of high NaCl concentration with/ without water dilution treatment were investigated. Generally, the methane generation decreased with increasing NaCl concentration. In addition, the sensitivity of the thermophilic AD to NaCl concentrations (5-10 g/L) was higher than that of the mesophilic AD. Furthermore, with an increase in the NaCl concentration from 0 to 30 g/L, the accumulative methane volumes of the thermophilic reactors decreased from 210 to 45 mL/gVS, and those of the mesophilic reactors decreased from 265 to 67 mL/gVS. Additionally, the pH of digestate decreased with increasing NaCl concentration. In contrast, the concentrations of the chemical oxygen demand and volatile fatty acid increased with increasing NaCl concentration. These results indicated that a shock loading of NaCl significantly reduced methane generation. In addition, the methane generation rates could be recovered up to 64-72% using water dilution as a remedial measure. Further investigation using 16S rRNA analysis revealed that the predominant genus of the methanogens shifted from Methanoculleus to Methanosarcina after the removal of the osmotic stress using water dilution.
Eunil Lee,Seok Hyeon Kim 韓國作物學會 1996 Korean journal of crop science Vol.41 No.3
시호 종자의 발아율을 증가시키기 위한 방법과 종자의 특징을 연구하기 위하여 본 실험을 수행하였다. 시호의 발아에 유리한 온도는 20℃ 이며, 호르몬 처리나 기타 물리화학적 처리에 의해 발아율은 크게 증가되지 못했는데, 15℃ 에서 발아시킬 경우 50~200 ppm의 GA3 을 처리했을 때 발아율이 2배 이상 증가하였다. 또한 같은 온도에서 102 ~103M의 KNO3 을 처리한 경우에도 발아율은 3배 이상 증가하였다. 그러나 20℃ 이상에서는 강력한 저해 효과를 나타내었다. 시호의 leachate를 상추의 종자에 처리했을 경우 발아율의 변화가 거의 없었으므로 시호의 종자에는 발아저해제가 거의 없는 것으로 생각된다. 해부현미경과 주사전자현미경으로 종자의 배와 주공을 관찰한 결과 배가 있는 것과 없는 것의 비율이 거의 50/50이며 주공 자체에는 문제가 없으므로 시호의 종자 발아율이 낮은 것은 근본적으로 배가 결여된 종자가 많기 때문인 것으로 생각된다. The experiment was conducted to determine the seed characteristics and preferable methods to enhance the seed germination rate in Bupleurum falcatum. The optimum temperature for the seed germination of Bupleurum falcatum is 20~circC . Any significant promoting effects were not found in seed germination with hormone treatments and physical methods. At 15~circC , prechilling combined with 50~200ppm of GA3 treatment raised germination rate by 2 times of control ones. The most positive effect was observed in the treatment of 10-2 ~10-3 M potassium nitrate only at 15~circC for 12 and 24 hours. The leachate of Bupleurum falcatum didn't inhibit the germination of Lactuca sativa, showing almost 100% of germination rate, which is suggested that no inhibitors contained in the seeds of Bupleurum falcatum. Observation of embryo conditions under stereoscopic microscope showed that the ratio of seeds with or without embryo is almost 50/50. The results suggested that the lower rate of germination in Bupleurum falcatum was caused by embryolessness of seeds.
Regional Security Order and South Korea-Japan Relations
( Eunil Cho ) 한국국방연구원 2022 The Korean Journal of Defense Analysis Vol.34 No.4
This preliminary study focuses on the change in the regional security order caused by the U.S.-China competition and its impact on South Korea-Japan relations. The ongoing U.S.-China relations has expanded beyond the discussion of cooperation and competition between existing and emerging powers, as well as the debate over the influence and resilience of the U.S.-led liberal international order. The significance of the U.S.-China competition in the security order in East Asia depends on whether China will accept the existing U.S.-led bilateral alliance system and take a status quo attitude. As a result, the U.S. allies, South Korea and Japan, need to respond sensitively to the changing nature of the security order. In this vein, this study explains the East Asian security order as elements of power structure, institutions, and actors. In addition, it explains the emergence of China as a new hegemonic power due to the U.S.-China competition, the hub-and-spokes system changes according to the U.S. rebalancing policy, and the emergence of Trumpism. Through this, the author argues two claims. First, the change in U.S.-China relations has led to different expectations between Seoul and Tokyo for cooperation with the U.S., which has hindered bilateral cooperation between them. Second, divergent views on China also hinder South Korea-Japan cooperation. Through the Senkaku dispute between Japan and China and the missile deployment dispute between South Korea and China, the two countries later showed different directions in their policy toward China. In the current competitive situation, restrictions on South Korea-Japan relations are inevitable. However, if the opportunity to promote security cooperation between South Korea and Japan is sought, it will be able to show the cooperation of middle power countries that can develop the security order to mitigate the intensity of U.S.-China competition.
Hahm, Eunil,Cha, Myeong Geun,Kang, Eun Ji,Pham, Xuan-Hung,Lee, Sang Hun,Kim, Hyung-Mo,Kim, Dong-Eun,Lee, Yoon-Sik,Jeong, Dae-Hong,Jun, Bong-Hyun American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.47
<P>Surface-enhanced Raman scattering (SERS) spectroscopy is attractive in various detection analysis fields. However, the quantitative method using SERS spectroscopy remains as an area to be developed. The key issues in developing quantitative analysis methods by using SERS spectroscopy are the fabrication of reliable SERS-active materials such as nanoparticle-based structures and the acquisition of the SERS signal without any disturbance that may change the SERS signal intensity and frequency. Here, the fabrication of seamless multilayered core-shell nanoparticles with an embedded Raman label compound as an internal standard (ML<SUB>RLC</SUB> dots) for quantitative SERS analysis is reported. The embedded Raman label compound in the nanostructure provides a reference value for calibrating the SERS signals. By using the ML<SUB>RLC</SUB> dots, it is possible to gain target analyte signals of different concentrations while retaining the Raman signal of the internal standard. The ML<SUB>4-BBT</SUB> dots, containing 4-bromobenzenethiol (4-BBT) as an internal standard, are successfully applied in the quantitative analysis of 4-fluorobenzenethiol and thiram, a model pesticide. Additionally, ratiometric analysis was proved practical through normalization of the relative SERS intensity. The ratiometric strategy could be applied to various SERS substrates for quantitative detection of a wide variety of targets.</P> [FIG OMISSION]</BR>