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The effect of volume conservation based on nucleon scattering analysis for W isotopes
Du Wenqing,Zhao Xiuniao,Sun Weili,Soukhovitskiĩ E. Sh. 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.6
On the basis of soft-rotor model, a good description of nucleon scattering on tungsten and neighboring nuclei was achieved in J. Phys. G: Nucl. Part. Phys. 48, 075101 (2021), and the nuclear volume conservation condition was introduced. The effect of volume conservation on calculations for tungsten isotopes is further investigated by defining the ratio R for cross sections, scattering angular distributions and analyzing powers. The results show that the volume conservation effect cannot be ignored. This effect is more significant in the low-energy region of cross sections and at extrema of angular distributions. Comparison between the calculated results and existing nuclear data evaluations in different evaluated nuclear data libraries is shown.
Zengying Zhao,Lili Cao,Anhui Hu,Weili Zhang,Xiaomei Ju,Yuanyuan Zhang,Wei Sun 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.2
By using ionic liquid 1-hexylpyridinium hexafluorophosphate (HPPF6) based carbon ionic liquid electrode (CILE) as the substrate electrode, a CoMoO4 nanorods and myoglobin (Mb) composite was casted on the surface of CILE with chitosan (CTS) as the film forming material to obtain the modified electrode (CTS/ CoMoO4-Mb/CILE). Spectroscopic results indicated that Mb retained its native structures without any conformational changes after mixed with CoMoO4 nanorods and CTS. Electrochemical behaviors of Mb on the electrode were carefully investigated by cyclic voltammetry with a pair of well-defined redox peaks from the heme Fe(III)/Fe(II) redox center of Mb appeared, which indicated that direct electron transfer between Mb and CILE was realized. Electrochemical parameters such as the electron transfer number (n), charge transfer coefficient (α) and electron transfer rate constant (ks) were estimated by cyclic voltammetry with the results as 1.09, 0.53 and 1.16 s−1, respectively. The Mb modified electrode showed good electrocatalytic ability toward the reduction of trichloroacetic acid in the concentration range from 0.1 to 32.0 mmol L−1 with the detection limit as 0.036 mmol L−1 (3σ), and the reduction of H2O2 in the concentration range from 0.12 to 397.0 μmol L− 1 with the detection limit as 0.0426 μmol L−1 (3σ).
Zhao, Zengying,Cao, Lili,Hu, Anhui,Zhang, Weili,Ju, Xiaomei,Zhang, Yuanyuan,Sun, Wei Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.2
By using ionic liquid 1-hexylpyridinium hexafluorophosphate ($HPPF_6$) based carbon ionic liquid electrode (CILE) as the substrate electrode, a $CoMoO_4$ nanorods and myoglobin (Mb) composite was casted on the surface of CILE with chitosan (CTS) as the film forming material to obtain the modified electrode (CTS/$CoMoO_4$-Mb/CILE). Spectroscopic results indicated that Mb retained its native structures without any conformational changes after mixed with $CoMoO_4$ nanorods and CTS. Electrochemical behaviors of Mb on the electrode were carefully investigated by cyclic voltammetry with a pair of well-defined redox peaks from the heme Fe(III)/Fe(II) redox center of Mb appeared, which indicated that direct electron transfer between Mb and CILE was realized. Electrochemical parameters such as the electron transfer number (n), charge transfer coefficient (${\alpha}$) and electron transfer rate constant ($k_s$) were estimated by cyclic voltammetry with the results as 1.09, 0.53 and 1.16 $s^{-1}$, respectively. The Mb modified electrode showed good electrocatalytic ability toward the reduction of trichloroacetic acid in the concentration range from 0.1 to 32.0 mmol $L^{-1}$ with the detection limit as 0.036 mmol $L^{-1}$ ($3{\sigma}$), and the reduction of $H_2O_2$ in the concentration range from 0.12 to 397.0 ${\mu}mol\;L^{-1}$ with the detection limit as 0.0426 ${\mu}mol\;L^{-1}$ ($3{\sigma}$).
Co-precipitation synthesis and characterization of Bi3+, Eu3+ co-doped nanocrystal Gd2WO6 phosphors.
Tian, Yue,Chen, Baojiu,Hua, Ruinian,Cheng, Lihong,Zhong, Haiyang,Sun, Jiashi,Wang, Bo,Wan, Jing,Lu, Weili,Jang, Kiwan American Scientific Publishers 2010 Journal of Nanoscience and Nanotechnology Vol.10 No.3
<P>Eu3+ single-doped and Bi3+/Eu3+ co-doped nanocrystal Gd2WO6 phosphors were successfully synthesized via a co-precipitation reaction. The structure and morphology of the phosphors were characterized by using X-ray powder diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The influence of Bi(3+)-doping concentration on the excitation and emission spectra was studied. It was found that the introduction of Bi3+ can greatly affect the charge transfer band and the luminescence intensity of Eu3+ but does not cause a change in the profile of emission spectra of Eu3+.</P>
Wei Li,Chang-Ji Zheng,Liang-Peng Sun,Ming-Xia Song,Yan Wu,Yin-Jing Li,Yi Liu,Hu-Ri Piao 대한약학회 2014 Archives of Pharmacal Research Vol.37 No.7
A series of arylhydrazone derivatives bearing arhodanine moiety have been synthesized, characterized, andevaluated as antibacterial agents. Some of these compoundsshowed potent antibacterial activities against several differentstrains of Gram-positive bacteria, including multidrug-resistant clinical isolates. Of the compounds tested, IIkand IIIk were identified as the most effective, with minimuminhibitory concentration values of 2–4 lg/mL against multidrug-resistant Gram-positive organisms, including methicillin-resistant and quinolone-resistant Staphylococcusaureus. None of the compounds exhibited any activityagainst the Gram-negative bacteria Escherichia coli 1356 at64 lg/mL.
Wei Li,Ya Nan Sun,이창열,방성희,김순옥,Jin Yeul Ma,김영호,심상희 대한약학회 2017 Archives of Pharmacal Research Vol.40 No.2
Two sesquiterpenoids, annulohpoxylotol A andB, were isolated along with five sterols from an ethylacetate extract of cultures of the endophytic fungus Annulohypoxylontruncatum growing on leaves of Zizaniacaduciflora. The structures of the isolated compounds wereestablished using one-dimensional (1D) and two-dimensional(2D)-NMR and mass spectrometry. The nuclearfactor-kappa B (NF-jB) inhibitory activities of the isolatedcompounds stimulated with tumor necrosis factor-alpha(TNF-a) were measured using a luciferase reporter system. Annulohpoxylotol A (1) significantly inhibited NF-jBactivation in a dose-dependent manner, with an IC50 of7.11 lM, whereas annulohpoxylotol B (2) and ergone (7)moderately inhibited NF-jB transcriptional activity, withIC50 values of 19.24 and 17.51 lM, respectively.
( Wei Li ),( Xi Tao Yan ),( Ya Nan Sun ),( Thi Thanh Ngan ),( Sang Hee Shim ),( Young Ho Kim ) 한국응용약물학회 2014 Biomolecules & Therapeutics(구 응용약물학회지) Vol.22 No.4
In this study, 23 oleanane-type triterpenoid saponins were isolated from a methanol extract of the roots of Pulsatilla koreana. The NF-κB inhibitory activity of the isolated compounds was measured in TNFα-treated HepG2 cells using a luciferase reporter system. Compounds 19-23 inhibited TNFα-stimulated NF-κB activation in a dose-dependent manner, with IC50 values ranging from 0.75-8.30 μM. Compounds 19 and 20 also inhibited the TNFα-induced expression of iNOS and ICAM-1 mRNA. Moreover, effect of the isolated compounds on PPARs transcriptional activity was assessed. Compounds 7-11 and 19-23 activated PPARs the transcriptional activity signifi cantly in a dose-dependent manner, with EC50 values ranging from 0.9-10.8 μM. These results suggest the presence of potent anti-infl ammatory components in P. koreana, and will facilitate the development of novel antiinfl ammatory agents.