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Wang, Xian-Yu,Wang, Songhu,Hinse, Tobias C.,Li, Kai,Wang, Yong-Hao,Laughlin, Gregory,Liu, Hui-Gen,Zhang, Hui,Wu, Zhen-Yu,Zhou, Xu,Zhou, Ji-Lin,Hu, Shao-Ming,Wu, Dong-Hong,Peng, Xi-Yan,Chen, Yuan-Yuan Astronomical Society of the Pacific 2018 Publications of the Astronomical Society of the Pa Vol.130 No.988
Non-Doped Organic Light-Emitting Diodes with Saturated Red Emission
Fei Xiao,Bing-xian Shao,Huan-rong Wu,Hui-ying Fu,Xiao-yuan Hou,Xin-dong Gao,Yi-qiang Zhan 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.2
Non-doped organic light-emitting diodes with saturated red emission were fabricated using 4-(2-(3,3-dicyanomethylene-5,5-dimethyl-1-cyclohexylidene)vinyl)phenyldi(1-naphthyl)amine (DNP-2CN) or 4-(2-(3,3-dicyanomethylene-5,5-dimethyl-1-cyclohexylidene)vinyl)phenyl(1-naphthyl)phe- nylamine (DPN-2CN) as the emitting layer. Different electron-transporting materials, tris(8-hydroxylquinoline) aluminum (Alq$_3$), 2,2',2''-(1,3,5-phenylene)tris[1-phenyl-1$H$-benzimidazole] (TPBI) and 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD), were introduced into the devices for examining their energy level compatibility of DNP-2CN or DPN-2CN. The device with a structure of ITO/ NPB/ DNP-2CN/ BCP/ Alq$_3$/ LiF/ Al showed red emission with $\lambda_{max}$ at 670 nm (CIE coordinates: $x$ = 0.66, $y$ = 0.33) and a high luminance of 438 cd m$^{-2}$ at a driving voltage of 12 V. The device with a structure of ITO/ NPB/ DPN-2CN/ BCP/ Alq$_3$/ LiF/ Al showed a high brightness of 225 cd m$^{-2}$ at a driving voltage of 12 V with $\lambda_{max}$ at 674 nm (CIE coordinates: $x$ = 0.65, $y$ = 0.33).
Li, Zhi-Fang,Wang, Shao-Ming,Shi, Ju-Fang,Zhao, Fang-Hui,Ma, Jun-Fei,Qiao, You-Lin,Feng, Xiang-Xian Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.7
Objectives: To investigate the current prevalence and knowledge of cervical cancer, breast cancer and reproductive tract infections (RTIs) in rural Chinese women, and to explore the acceptance and feasibility of implementing a combined screening program in rural China. Methods: A population-based, cross-sectional study was conducted among women aged 30 to 59 years old in Xiangyuan County, Shanxi Province from 2009 to 2010. Socio-demographic characteristics, knowledge of cervical cancer, breast cancer and RTIs, and the attitude toward single or combined screening were collected by an interview questionnaire. Each participant received a clinical examination of the cervix, breast and reproductive tract. Examinations included visual inspection, mammography, laboratory tests and pathological diagnosis. Results: A total of 1,530 women were enrolled in this study. The prevalence of cervical precancerous lesions, suspicious breast cancer, suspicious benign breast disease and RTIs was 1.4%, 0.2%, 14.0% and 54.3%, respectively. Cervicitis, trichomonas vaginitis, and bacterial vaginitis were the three most common RTIs among our participants. Television, radio broadcast, and public education during screening were the major source of healthcare knowledge in rural China. Moreover 99.7% of women expressed great interest in participating in a combined screening project. The affordable limit for combined screening project was only 50 RMB for more than half of the rural women. Conclusion: A combined screening program would be more effective and popular than single disease screening projects, while appropriate accompanied education and a co-pay model for its successful implementation need to be explored, especially in low-resource settings.
Antimicrobial Constituents from Fruits of Ailanthus Altissima SWINGLE
Zhao Chun-Chao,Shao Jian-Hua,Li Xian,Xu Jing,Zhang Peng The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.10
A new naturally occurring sterol, compound 5, and six known stigmasterols were isolated from fruits of Ailanthus altissima Swingle by repeated column chromatography and RP-HPLC. Their structures were identified as, 5${\alpha}$-stigmastane-3,6-dione (1), 3${\beta}$-hydroxystigmast-5-en-7-one (2), stigmast-5-ene-3${\beta}$, 7${\alpha}$-diol (3), 6${\alpha}$-hydroxystigmast-4-en-3-one (4), 5${\alpha}$-stigmastane-3${\beta}$, 6${\beta}$-diol (5), stigmast-4-ene-3${\beta}$, 6${\alpha}$-diol (6), stigmast-5-ene-3${\beta}$, 7${\alpha}$, 20$\xi$-triol (7) by spectral analysis and comparison with the published data. These compounds have not been reported from genus Ailanthus, whereas compound 7 was identified by NMR for the first time. In addition, the $95\%$ ethanol extract and compounds from the fruits of Ailanthus altissima SWINGLE were assayed for in vitro antimicrobial activity. The extract was potent active against the assayed bacteria while compounds 3 and 7 exhibited moderate activity.
Shuai Ji,Yujie Wang,Shikai Gao,Xian Shao,Wei Cui,Yan Du,Mengzhe Guo,Daoquan Tang 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
Lots of minor constituents in herbal medicines have shown great potential to devolve into leadcompounds, and their extraction is attracting more and more attention in pharmaceutical industry. Thisstudy provided an example that showed efficient and selective extraction of minor bioactive naturalproducts (prenylatedflavonoids with anti-cancer activities) from an herbal medicine (licorice) using pureionic liquids as green solvents. After investigation of a variety of hydrophobic ionic liquids withultrasonic-assisted extraction, we found that [C8MIM]BF4 (1-octyl-3-methylimidazolium tetrafluor-oborate) was the most effective one for extraction offive representative compounds (isoangustone A,glycycoumarin, licoisoflavanone, licoricidin and glabridin), and solvent to solid ratio, extraction time,extraction temperature and soaking time were then optimized through single-factor experiments andresponse surface methodology. As a result, the established method had significantly higher extractionselectivity than conventional organic solvents, which could be attributed to significant physical change oflicorice microstructures after extraction, as well as strong interactions (especially hydrogen bondinteractions) between [C8MIM]BF4 and prenylatedflavonoids by mechanism study. In addition, 78.92% ofthe extracted prenylatedflavonoids could be readily recovered from [C8MIM]BF4 by using reversed-phasesolid phase extraction, and the recyclability of [C8MIM]BF4 was also confirmed.
Antimicrobial Constituents from Fruits of Ailanthus Altissima SWINGLE
Chun-Chao Zhao,Jian-Hua Shao,Xian Li,Jing Xu,Peng Zhang 대한약학회 2005 Archives of Pharmacal Research Vol.28 No.10
A new naturally occurring sterol, compound 5, and six known stigmasterols were isolated from fruits of Ailanthus altissima Swingle by repeated column chromatography and RP-HPLC. Their structures were identified as, 5α-stigmastane-3,6-dione (1), 3β-hydroxystigmast-5-en-7-one (2), stigmast-5-ene-3β, 7α-diol (3), 6α-hydroxystigmast-4-en-3-one (4), 5α-stigmastane-3β, 6β- diol (5), stigmast-4-ene-3β, 6α-diol (6), stigmast-5-ene-3β, 7α, 20ξ-triol (7) by spectral analysis and comparison with the published data. These compounds have not been reported from genus Ailanthus, whereas compound 7 was identified by NMR for the first time. In addition, the 95% ethanol extract and compounds from the fruits of Ailanthus altissima SWINGLE were assayed for in vitro antimicrobial activity. The extract was potent active against the assayed bacteria while compounds 3 and 7 exhibited moderate activity.
Multi-size Numerical Simulation of Bubbles on Gas-liquid Two-Phase Flow in a Centrifugal Pump
Tan Minggao,Tong Qin,Wu Xian-Fang,Shao Chen,Ma Haochen 한국유체기계학회 2023 International journal of fluid machinery and syste Vol.16 No.4
In order to further understand the distribution and motion of gas phase in the gas-liquid two-phase flow inside a centrifugal pump, the numerical simulation on gas-liquid two-phase flow in the centrifugal pump was carried out and the CFD method was verified by experiment test. The MUSIG model was used as the multiphase flow model, coupled with the Prince-Blanch model and the Luo-Svendson model to describe the bubble breaking and coalescence process. The influence of inlet gas volume fraction and liquid flow rate on the gas-liquid two-phase flow inside centrifugal pump was investigated. The results show that the proportion of large bubbles in impeller is higher than that in volute. Large bubbles are mainly at the suction chamber inlet and impeller inlet, and small bubbles are mainly at the impeller outlet and volute outlet. From suction chamber, impeller to the volute, the average diameter of bubbles decreases in turn. With the increase of inlet gas volume fraction, the proportion of small bubbles in the pump decreases. Also, the flow pattern inside the pump gradually changes from bubble flow to gas pocket flow and the average diameter of bubbles in each flow passage component increases. With the increase of liquid flow rate, the proportion of small bubbles in the pump increases. Meanwhile, the flow pattern gradually changes from gas pocket flow to bubble flow and the average diameter of bubbles in each flow passage component decreases.