http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Soybean Ecological Response and Seed Quality According to Altitude and Seeding Dates
Sang-Ouk Shin,Seong-Hyu Shin,Tae-Jeong Ha,Sea-Gyu Lim,Kyung-Jin Choi,In-Youl Baek,Sang-Chul Lee,Keum-Yong Park 韓國作物學會 2009 Korean journal of crop science Vol.54 No.2
This experiment was carried out to examine ecological response and soybean quality as affected by environmental cultivation for producing high seed quality in domestic soybean variety. The results are as follows: Under equal cumulative temperature condition, soybean plants grown in Muju showed longer days to flowering, which was an effect of the long day-length on high latitudes, and longer duration of reproductive stage as a result of low temperature within that period. Considering apparent seed quality, 100 seed weight of soybeans grown in Muju was heavier than Miryang. Ratio of seed crack and disease-damaged seeds was lower in Muju, and these parameters decreases as planting was delayed. The protein contents did not show significant difference in terms of altitude and planting date, however, crude oil contents were higher in Miryang. An opposite trend was observed in C18:1 and C18:3. In the fatty acid composition, the proportion of C18:1 decreased as seeding date was delayed, and was higher in Miryang. Opposite observations were obtained from C18:3. The anthocyanin contents were highest on June 10 planting and higher in Muju than in Miryang. Isoflavone content was higher as seeding date was delayed and is similar accross seeding dates in Muju. As a summary, for high seed quality production the optimum planting date was June 10, and Muju was more suitable region than Miryang.
Sang Won Kim,Dongryul Oh,Hee Chul Park,Do Hoon Lim,Sung Wook Shin,Sung Ki Cho,Geum-Youn Gwak,Moon Seok Choi,Yong Han Paik,Seung Woon Paik 대한방사선종양학회 2014 Radiation Oncology Journal Vol.32 No.1
Purpose: To evaluate the safety and efficacy of transcatheter arterial chemoembolization (TACE) followed by radiotherapy (RT) in treatment-naïve patients with locally advanced hepatocellular carcinoma (HCC). Materials and Methods: Eligibility criteria were as follows: newly diagnosed with HCC, the Barcelona Clinic Liver Cancer stage C, Child-Pugh class A or B, and no prior treatment for HCC. Patients with extrahepatic spread were excluded. A total of 59 patients were retrospectively enrolled. All patients were treated with TACE followed by RT. The time interval between TACE and RT was 2 weeks as per protocol. A median RT dose was 47.25 Gy10 as the biologically effective dose using the α/β = 10 (range, 39 to 65.25 Gy10). Results: At 1 month, complete response was obtained in 3 patients (5%), partial response in 27 patients (46%), stable disease in 13 patients (22%), and progressive disease in 16 patients (27%). The actuarial one- and two-year OS rates were 60.1% and 47.2%, respectively. The median OS was 17 months (95% confidence interval, 5.6 to 28.4 months). The median time to progression was 4 months (range, 1 to 35 months). Grade 3 or greater liver enzyme elevation occurred in only two patients (3%) after RT. Grade 3 gastroduodenal toxicity developed in two patients (3%). Conclusion: The combination treatment of TACE followed by RT with two-week interval was safe and it showed favorable outcomes in treatment-naïve patients with locally advanced HCC. A prospective randomized trial is needed to validate these results.
Lim, So-Hee,Kwon, Seok-Kyu,Lee, Myung Kyu,Moon, Jeonghee,Jeong, Dae Gwin,Park, Eunha,Kim, Seung Jun,Park, Byung Chul,Lee, Sang Chul,Ryu, Seong-Eon,Yu, Dae-Yeul,Chung, Bong Hyun,Kim, Eunjoon,Myung, Pyu Published for the European Molecular Biology Organ 2009 The EMBO journal Vol.28 No.22
<P>The receptor-type protein tyrosine phosphatases (RPTPs) have been linked to signal transduction, cell adhesion, and neurite extension. PTPRT/RPTPrho is exclusively expressed in the central nervous system and regulates synapse formation by interacting with cell adhesion molecules and Fyn protein tyrosine kinase. Overexpression of PTPRT in cultured neurons increased the number of excitatory and inhibitory synapses by recruiting neuroligins that interact with PTPRT through their ecto-domains. In contrast, knockdown of PTPRT inhibited synapse formation and withered dendrites. Incubation of cultured neurons with recombinant proteins containing the extracellular region of PTPRT reduced the number of synapses by inhibiting the interaction between ecto-domains. Synapse formation by PTPRT was inhibited by phosphorylation of tyrosine 912 within the membrane-proximal catalytic domain of PTPRT by Fyn. This tyrosine phosphorylation reduced phosphatase activity of PTPRT and reinforced homophilic interactions of PTPRT, thereby preventing the heterophilic interaction between PTPRT and neuroligins. These results suggest that brain-specific PTPRT regulates synapse formation through interaction with cell adhesion molecules, and this function and the phosphatase activity are attenuated through tyrosine phosphorylation by the synaptic tyrosine kinase Fyn.</P>
Lim, Hyung-Chul,Sung, Ki-Pyoung,Choi, Mansoo,Park, Jong Uk,Choi, Chul-Sung,Bang, Seong-Cheol,Choi, Young-Jun,Moon, Hong-Kyu The Korean Space Science Society 2021 Journal of astronomy and space sciences Vol.38 No.3
Apophis is a near-Earth object with a diameter of approximately 340 m, which will come closer to the Earth than a geostationary orbit in 2029, offering a unique opportunity for characterizing the object during the upcoming encounter. Therefore, Korea Astronomy and Space Science Institute has a plan to propose a space mission to explore the Apophis asteroid using scientific instruments such as a laser altimeter. In this study, we evaluate the performance metrics of a laser altimeter using a pseudorandom noise modulation technique for the Apophis mission, in terms of detection probability and ranging accuracy. The closed-form expression of detection probability is provided using the cross correlation between the received pulse trains and pseudo-random binary sequence. And the new ranging accuracy model using Gaussian error propagation is also derived by considering the sampling rate. The operation range is significantly limited by thermal noise rather than background noise, owing to not only the low power laser but also the avalanche photodiode in the analog mode operation. However, it is demonstrated from the numerical simulation that the laser altimeter can achieve the ranging performance required for a proximity operation mode, which employs commercially available components onboard CubeSat-scale satellites for optical communications.
Plant Growth-promoting Activity of Acremonium strictum MJN1 Isolated from Roots of Panax ginseng
Lim, Hyung-Bum,Chung, Yang-Jo,Bae, Ju-Yun,Kim, Dong-Jin,Kwon, Hyung-Jin,Lee, In Hyung,Chung, Byung-Chul,Lee, Woong-Sang,Suh, Joo-Won 한국응용생명화학회 2000 Journal of Applied Biological Chemistry (J. Appl. Vol.43 No.2
The plant growth-promoting activity of Acremonium strictum MJN1 isolated from roots of Panox ginseng was explored. The myceliaI extract of A. strictum MJN1 enhanced the rice seedling growth by 14.5 and 9.0% in the dried weight of shoots and roots, and the growth of red pepper by 54 and 85% in the top length and the dried weight in pot experiments, respectively. The plant growth-promoting substances in the myceliaI extract of Acremonium strictum MJN1 were identified as D-adenosine and glycerol. Both commercial D-adenosine and glycerol also promoted significantly the rice seedling growth but, unlike the mycelial extract of A. strictum MJN1, hardly affected the yields of plants grown in pots or field. Therefore, it is possible that other plant growth-promoting substances are produced by A. strictum MJN1. However, this study shows that A. strictum MJN1 has a great potential as a biofertilizer.
Lim, Jong Suk,Lee, Jae-Kwang,Seol, Hyun-Soo,Kang, Dong-Woo,Lee, Ju,Go, Sung-Chul Institute of Electrical and Electronics Engineers 2018 IEEE transactions on applied superconductivity Vol.28 No.3
<P>Generally, brushless dc (BLDC) motor control uses a 120° conduction method that utilizes a low-cost Hall sensor as a position sensor. However, because of the mounting position error of the Hall sensor and the uneven magnetic flux density of the rotor, an erroneous position signal may be output, which will adversely affect the BLDC motor control. Therefore, this paper analyzes the abnormal electric current section that occurs due to the position error of the Hall sensor and the uneven magnetic flux density. Subsequently, the error is derived from the analyzed phenomenon as a formula. The compensation control algorithm to overcome the control problem due to this error is studied, and a method to maintain an accurate energization interval is suggested. Further, it is shown through experiments that the quantitative analysis of the error using the proposed compensation control algorithm is valid.</P>
Lim, Chae-og,Park, Byeong-cheol,Lee, Jae-chul,Kim, Eun Soo,Shin, Sung-chul The Society of Naval Architects of Korea 2019 International Journal of Naval Architecture and Oc Vol.11 No.2
This study predicts the power consumption of an Electric Propulsion Ship (EPS) in marine environment. The EPS is driven by a propeller rotated by a propulsion motor, and the power consumption of the propeller changes by the marine environment. The propulsion motor consumes the highest percentage of the ships' total power. Therefore, it is necessary to predict the power consumption and determine the power generation capacity and the propeller capacity to design an efficient EPS. This study constructs a power estimation simulator for EPS by using a ship motion model including marine environment and an electric power consumption model. The usage factor that represents the relationship between power consumption and propulsion is applied to the simulator for power prediction. Four marine environment scenarios are set up and the power consumed by the propeller to maintain a constant ship speed according to the marine environment is predicted in each scenario.
Evaluation of Maternal Toxicity in Rats Exposed to Multi-Wall Carbon Nanotubes during Pregnancy
Lim, Jeong-Hyeon,Kim, Sung-Hwan,Lee, In-Chul,Moon, Chang-Jong,Kim, Sung-Ho,Shin, Dong-Ho,Kim, Hyoung-Chin,Kim, Jong-Choon The Korean Society of Environmental Toxicology 2011 환경독성보건학회지 Vol.26 No.-
Objectives: The present study investigated the potential adverse effects of multi-wall carbon nanotubes (MWCNTs) on pregnant dams and embryonic development following maternal exposure in rats. Methods: MWCNTs were orally administered to pregnant rats from gestational day (GD) 6 through 19 at dose levels of 0, 8, 40, 200, and 1000 mg/kg/day. During the test period, clinical signs, mortality, body weights, food consumption, serum biochemistry, oxidant-antioxidant status, gross findings, organ weights, and Caesarean section findings were examined. Results: All animals survived to the end of the study. A decrease in thymus weight was observed in the highest dose group. However, maternal body weight, food consumption, serum biochemical parameters, and oxidant-antioxidant balance in the kidneys were not affected by treatment with MWCNTs. No treatment-related differences in gestational index, embryo-fetal mortality, or fetal and placental weights were observed between treated and control groups. Conclusions: The results show that 14-day repeated oral dosing of MWCNTs during pregnancy induces minimal maternal toxicity at 1000 mg/kg/day in rats. Under these experimental conditions, the no-observed-adverse-effect level of MWCNTs is considered to be 200 mg/kg/day for dams and 1000 mg/kg/day for embryonic development.
Lim, Jung Tae,Kim, Sam Jin,Sur, Jung Chul,Kim, Chul Sung American Scientific Publishers 2018 Science Of Advanced Materials Vol.10 No.5
<P>The polycrystalline YFe0.7Mn0.3O3 sample was synthesized by using standard solid state reaction method. The crystalline structure and magnetic properties of sample were investigated with X-ray diffractometer (XRD), vibrating sample magnetometer (VSM), and Mossbauer spectroscopy. From the refined XRD patterns at 295 K, YFe0.7Mn0.3O3 sample was found to be single-phased with the Bragg factor (R-B) and structure factor (R-F) of 3.88 and 3.67%, respectively. The YFe0.7Mn0.3O3 sample was determined to be orthorhombic with space group Pnma, and lattice constant a(0), b(0) and c(0) of sample were 5.647, 7.544 and 5.273 angstrom, respectively. Based on the field-dependent magnetization curves of YFe0.7Mn0.3O3 sample up to 10 kOe at 295 K, the sample shows weak ferromagnetic behavior because of Fe-O-Fe and Fe-O-Mn. From the temperature dependence of magnetization curves under 100 Oe between 4.2 and 300 K, YFe0.7Mn0.3O3 sample show spin reorientation from antiferromagnetic to weak ferromagnetic around 265 K. We have obtained Mossbauer spectra of YFe0.7Mn0.3O3 sample at various temperature ranging from 4.2 to 295 K. Mossbauer spectra were least-square fitted as a function of the Fe atom distribution below Curie temperature (T-c). From the analyzed Mossbauer spectra, YFe0.7Mn0.3O3 sample have shown abrupt changes in the magnitude and slope of hyperfine field (H-hf) and electric quadrupole shift (E-Q) around spin reorientation temperature. In addition, the obtained value of isomer shift (delta) show that the charge state of Fe ions is Fe3+ high spin.</P>