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Chemical constituents from Inula wissmanniana and their anti-inflammatory activities
Chunhui Wang,Xufeng Zhang,Panlei Wei,Xiangrong Cheng,Jie Ren,Shi Kai Yan,Wei Dong Zhang,Hui Zi Jin 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.12
Two new inositol derivatives, 4-acetate-1,2,3,5-tetrakis(2-methyl-2-butenoate) inositol (1) and 3-acetate-1,2,4,5-tetrakis(2-methyl-2-butenoate) inositol (2), onenew flavonolignan 23-o-acetylsilychristin A (3), and onenew thymol derivative 3-hydroxy-4-(2-hydroxy-1-methylethyl)benzoic acid (4), along with 13 known compounds,including ten flavonolignans (5–14) and three thymolderivatives (15–17) were isolated from the aerial part ofInula wissmanniana. The structures of new compoundswere elucidated by detailed spectroscopic analysis,including HRESIMS and 2D-NMR spectroscopic data. Allthe compounds were isolated from this plant for the firsttime. The anti-inflammatory activities of the compoundswere tested against LPS-induced NO production in RAW264.7 macrophages.
Management of Basic Scientific Research Achievements Based on Knowledge Supernetwork
Wei Sun,Chunhui Huo,Yang Yu 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.11
Basic scientific research achievements management involves multiple knowledge resources. We propose a knowledge supernetwork model to integrate multiple knowledge resources. First, person network, material carrier network, and knowledge element network are established. Subsequently, the knowledge supernetwork is constructed to integrate the above three networks. Second, the characteristics of knowledge supernetwork are investigated from the perspective of the quantitative analysis. Based on the knowledge supernetwork, some methods for solving real problems are developed. Finally, we construct a knowledge supernetwork model using real basic scientific research achievement files. The methods of knowledge representation, basic scientific research proposal grouping, and knowledge classification are proposed to illustrate how to manage basic scientific research achievement from the perspective of knowledge.
Wei Sun,Chunhui Huo,Yang Yu 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.12
To investigate the reasonable method for selecting persons in organization personnel training, our study focuses on the formulation of personnel selection in organization personnel training based on knowledge supernetwork. First, this paper states the process of constructing organization training supernetwork and formulates the model for selecting single person. Subsequently, we establish the model for selecting multiple persons based on training knowledge supernetwork and analyze the complexity and the shortcomings in detail. Third, to improve the accuracy of personnel selection, we build the model for selecting multiple persons based on step-by-step method and analyze the complexity. Final, the proposed models are verified by an application case.
Chemical constituents of the stems of Celastrus rugosus
Ruijie Chang,Chunhui Wang,Qi Zeng,Bin Guan,Wei Dong Zhang,Hui Zi Jin 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.11
Two new sesquiterpene pyridine alkaloids rugosusinesA and B (1 and 2), and thirty-one known compoundswere isolated from the stems of Celastrus rugosus. The structures of new compounds were elucidated bydetailed spectroscopic analysis, including HR-ESI–MS and2D NMR spectroscopic data. All the compounds wereisolated from this plant for the first time. The cytotoxicitiesof these compounds were tested against SKOV3 and MGC-803 cell lines by CCK-8 method.
Da Li,Ikjae Lee,Cong Yi,Wei Gao,Chunhui Song,Shenglei Fu,Moohyun Kim,Alex Ran,Tuanjie Liu Techno-Press 2023 Ocean systems engineering Vol.13 No.3
The global performance of a 15 MW floating offshore wind turbine, a newly designed semisubmersible floating foundation with multiple heave plates by CNOOC, is investigated with two independent turbine-floater-mooring coupled dynamic analysis programs CHARM3D-FAST and OrcaFlex. The semisubmersible platform hosts IEA 15 MW reference wind turbine modulated for VolturnUS-S and hybrid type (chain-wire-chain with clumps) 3×2 mooring lines targeting the water depth of 100 m. The numerical free-decay simulation results are compared with physical experiments with 1:64 scaled model in 3D wave basin, from which appropriate drag coefficients for heave plates were estimated. The tuned numerical simulation tools were then used for the feasibility and global performance analysis of the FOWT considering the 50-yr-storm condition and maximum operational condition. The effect of tower flexibility was investigated by comparing tower-base fore-aft bending moment and nacelle translational accelerations. It is found that the tower-base bending moment and nacelle accelerations can be appreciably increased due to the tower flexibility.
Li Juanfei,Wu Lei,Ma Mingyu,Song Ruifeng,Dong Chunhui,Wei Junfang,Li Jinsheng,Wang Xiaoqiang,Li Mingya 한국물리학회 2023 Current Applied Physics Vol.46 No.-
La0.7Sr0.3MnO3 (LSMO)/LaNiO3 (LNO) thin films were deposited successively on Si single crystal by the sol-gel method. The bipolar resistive switching (RS) behavior was studied in Al/LSMO/LNO devices. Obvious current hysteresis was observed, the set (reset) voltage and resistance ratio were modulated by the annealing temperature of LSMO thin films. At the annealing temperature of 750 ◦C, good endurance and retention performance were obtained in the memory device. According to the fitting results of I–V curves, based on Schottky emission model, the conduction mechanisms of Al/LSMO/LNO devices were discussed. Our results may give a valuable insight on developing perovskite-type rare earth manganese oxide.