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The Informational Role of Volume by Investor Group
Song-Yue, Han 한국재무학회 2008 한국재무학회 학술대회 Vol.2008 No.05
This paper studies the informational role of trading volume using common stocks categorized by investor group in Korean stock market from January 2004 to December 2006. The GARCH(1,1) model fits Korean stock market well and the volume variables ( such as absolute value of the net buy volume, excess buy volume and excess sell volume) have additional explanatory effect when they are included in the variance equation of the GARCH(1,1) model. This paper further test whether the effects of excess sell volume and excess buy volume on volatility is asymmetric. In addition, the effects of volume on volatility are shown to be different by investor groups. Because of the information disadvantage, the daily return volatility is highly correlated with the volume of domestic individual investors and non-listed foreign investors. Finally, I extend this result to an expanded data set that includes 477 common stocks.
Yue Lin,Yuanyuan Zhang,Qiongtao Song,Tao Song,Xue Han,Ying Zhang,Xuan Zhang,Xi Chu,Fenghua Zhang,Li Chu,Jianping Zhang 대한약학회 2017 Archives of Pharmacal Research Vol.40 No.10
To explore the cardiovascular protective effectsof Magnesium isoglycyrrhizinate (MI), especially theunderlying cellular mechanisms related to L-type calciumchannels and myocardial contractility, and to examine theeffects of MI on hERG K? current expressed in HEK293cells. We used the whole-cell patch clamp technique,video-based edge detection and dual excitation fluorescencephotomultiplier systems to explore the effect of MIon L-type Ca2? currents (ICa-L) and cell contraction in ratcardiomyocytes. We also examined the rapidly activatingdelayed rectifier potassium current (IKr) expressed inHEK293 cells using a perforated patch clamp. MI inhibitedICa-L in a dose-dependent manner, with a half-maximalinhibitory concentration (IC50) of 0.22 mg/ml, and themaximal inhibitory effect was 61.10 ± 0.59%. MI at aconcentration of 0.3 mg/ml reduced cell shortening by24.12 ± 3.97% and the peak value of the Ca2? transient by36.54 ± 4.96%. MI had no significant influence on hERGK? channels expressed in HEK293 cells at all testpotentials. MI exerts protective effects on the heart via theinhibition of ICa-L and cell shortening in rat cardiomyocytes. However, MI had no significant influence on IKr;thus, MI may exert cardioprotective effects without causingdrug-induced long QT syndrome.
Mingyao Song,Zhengyang Duan,Ronggao Qin,Xiaojun Xu,Shuli Liu,Shumin Song,Mengjiao Zhang,Yue Li,Jiemei Shi 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.6
Xanthate-modified baker’s yeast (XMBY) was successfully synthesized by grafting xanthate groups onto the surface of baker’s yeast and was used for the simultaneous adsorption of cadmium (Cd2+) and methylene blue (MB) from aqueous solution. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the synthesized adsorbent. The results indicated that the sulfur groups were successfully introduced onto the surface of the baker’s yeast and participated in the adsorption processes. The kinetic and isotherm data showed good correlations with the pseudo-second-order model and the Langmuir model, respectively. The equilibrium time and the maximum values obtained from the two models were 40 min, 239.8mg/g for Cd2+ and 300 min, 64.45mg/g for MB, respectively. The thermodynamic analysis (G<0, H>0, S>0) demonstrated that the adsorption processes of Cd2+ and MB onto the XMBY were endothermic and spontaneous. In the binary-component solution (Cd2+ and MB), the adsorption capacity for MB was almost unaffected by the presence of Cd2+ and interestingly, the adsorption capacity for Cd2+ increased in the presence of MB. Overall, these results indicated that XMBY could be a promising adsorbent for the treatment of wastewater containing both Cd2+ and MB.
Zhang Ni,Jiang Jia,Song Yue-Hua 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.3
Two new species: A. (Arboridia) xiaotungensis sp. nov. and A. (Arboridia) luojiashangensis sp. nov. from Guizhou Province, China are described and illustrated. In addition, the appearances of A. reniformis Song & Li (2013a) and A. anteoculara Song & Li (2013a) are supplementarily described. A key to distinguish all known species of the genus from China is provided. LSID: https://www.zoobank.org/urn:lsid:zoobank.org:pub:3DD14108-ED08-430D-AE8D-CD0 FCC215A4E
Jiang Jia,Tan Wei-Wen,Song Yue-Hua 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.3
In this paper, one new species of the leafhopper genus Thaioneura Song, Li & Dietrich, 2016 from Guizhou Province, China are described and illustrated: Thaioneura huajiangensis sp. nov. And the female ovipositors are photographed and described. A key to distinguish all known species of the genus is provided. The hind wing venation of the new species are the same as the T. suphanburia and T. sinuata, and not common in the tribe Erythroneurini.
Synthesis and properties of ultrafine YAG powder via low-temperature microwave hydrothermal method
Yue Liu,Jieguang Song,Lin Chen,Huihui Luo,Guojian Lin,Peng Chen,Chenhui Wei,Jingjing Liu 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.4
Yttrium aluminum garnet (YAG) has good optical properties and has been widely used in engineering. The preparation ofconventional YAG powder is costly due to its high synthesis temperature, so lowering the synthesis temperature is the mosteffective way to save cost. The ultrafine oxide composite powder was rapidly synthesized using the microwave hydrothermalmethod at a low temperature. The effect of temperature and its performance. Differential thermal analysis and XRD phaseanalysis showed the mixed solution of Al(NO3)3 and Y(NO3)3 at pH=9 and C(Al3+)=0.42 mol·L−1. SEM, zeta potential, andparticle size analysis revealed that the microwave hydrothermal reaction temperature was 170 oC, and the high-purityultrafine YAG powder was calcined at 928 oC, which was lower than conventional calcination temperature. The synthesizedultrafine spherical YAG powder had a small particle size and a uniform distribution.
The role of CTNNB1 and LEF1 in feather follicles development of Anser cygnoides and Anser anser
Yue Sun,Yuxuan Zhou,Petunia Msuthwana,Jing Liu,Chang Liu,Cornelius Tlotliso Sello,Yupu Song,Ziqiang Feng,Shengyi Li,Wei Yang,Yunpeng Xu,Xiaomin Yan,Chuanghang Li,Yujian Sui,Jingtao Hu,Yongfeng Sun 한국유전학회 2020 Genes & Genomics Vol.42 No.7
Background Wingless-types/beta-catenin (Wnt/β-catenin) signaling pathway is one of the most extensively studied transcriptional cascades involved in various types of organogenesis including embryonic and postnatal development. Downy feather quantity is primarily affected by follicular development and gene regulations. Objective This research was aimed to investigate the role of catenin beta-1(CTNNB1) and lymphoid enhancerbinding factor-1 (LEF1) on feather follicles development at different developmental stages. Methods Fluorescence quantitative PCR, Western-blot and immunohistochemical methods were used in Anser cygnoides and Anser anser embryos (E12, E13 E18, and E28) and after birth gosling stages (G18, G48, G88) for gene expression analysis. Results CTNNB1 and LEF1 genes were expressed in Anser cygnoides and Anser anser at different embryonic and after-birth gosling developmental stages and the expression levels were significantly different in different stages (p < 0.05). The mRNA expression of CTNNB1 and LEF1 genes reached the highest level at D88 in Anser cygnoides, while the highest expression levels were at D18 and D88 in Anser anser, and the expression levels of CTNNB1 genes at D88 in all embryonic stages were significantly lower than after-birth stages. CTNNB1 and LEF1 protein expression were the highest at E12 and E28 for Anser cygnoides feather follicles development. While at a similar stage for Anser anser, the expression of CTNNB1 and LEF1 protein was the highest at D48 and D18. Protein expression at embryonic stages was in the epidermis (E) and the hair basal plate (P), the expression site for after-birth stages was in the dermal papilla (DP). Conclusion Our study illustrated that CTNNB1 and LEF1 has an impact on Anser cygnoides and Anser anser feather follicles growth and development.
開閉Surge에 의한 PMMA의 異常絶綠破壤에 關한 硏究
송찬일,유병수 조선대학교 동력자원연구소 1987 動力資源硏究所誌 Vol.9 No.2
The probability of the occurrence of anomalous breakdown in PMMA under switching surge voltages was investigated experimentaly in this paper. The anomalous breakdown is statistical in nature, and the times for anomalous breakdowns are longer than the times for direct breakdowns. During the experiments, it was resulted that the location of anomalous breakdown, as measured from the high voltage electrode, was furder away with negative switching surge voltage than with positive voltages. The polarity of switching surge has a profound effect on the distance of breakdown from the high voltage electroude.