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- 저자 : Fuling Zhang (검색결과 5 건)
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XIAOYU ZHANG,JIANLI HUA,JINXIANG HE,WENJUN WU,HANS AGREN,XIN LI,FULING GUO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.5
In this paper, we have designed and synthesized four bithiazole-bridged sensitizers (BT-T2,TBT-T2, BT-T3 and TBT-T3) with triphenylamine and indoline as the donor segment andapplied them to dye-sensitized solar cells (DSSCs). For triphenylamine-based sensitizers as BT-T2 and TBT-T2, adding one thiophene unit between triphenylamine donor and bithiazolemoiety not only led to bathochromic shift of the maximum absorption and increase of molarextinction coe±cient, but also enhanced the photovoltaic conversion e±ciency from 7.12% ofBT-T2 to 7.51% of TBT-T2. But for indoline-based sensitizers as BT-T3 and TBT-T3,adding one thiophene unit between indoline donor and bithiazole moiety resulted in hypochro-matic shift instead of bathochromic shift. We employed the density functional theory (DFT)calculations to further investigate the in°uence of the thiophene unit on their optical and elec-tronic properties and photovoltaic performance of corresponding DSSC devices. Given theresults, a reasonable explanation is the introduction of thiophene unit suppressed the intramo-lecular charge transfer and charge separation in the conjugation system of indoline-based sen-sitizer, which led to the hypochromatic shift of the maximum absorption wavelength and ¯nallythe low Jsc . Since the Jsc dropped sharply from 15.26 mAcm? 2 to 4.52 mAcm? 2 , the photovoltaicconversion e±ciency decreased dramatically from 7.86% to 1.93%.
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Wen Fule,Wang Lin,Fang Zhiyin,Zhu Jinjin,Zhang Yaqing 한국간호과학회 2020 Asian Nursing Research Vol.14 No.2
Purpose: The aim of the study was to modify and test the psychometric properties of the Chinese version of the work control scale (C-WCS). Methods: The translated scale was administered to 840 nurses in Shanghai. Validity was assessed in terms of content validity and construct validity using exploratory factor analysis and confirmatory factor analysis. Internal consistency and testeretest reliability were estimated using Cronbach a and the intraclass correlation coefficient. Results: Psychometric analyses of the C-WCS indicate high reliability and good content and construct validity. Conclusion: The C-WCS has good psychometric properties and can be used as a valid tool for measuring work control among nurses in China. The C-WCS will help to further explore the correlations between perceived work control and organizational quality indicators such as nurses' satisfaction, job stress, wellbeing, or intention to stay. It can also be used in nursing outcome studies of work control strategies.
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Yuan Gao,Yubin Ji,Fuling Wang,Wenlan Li,Xiaomeng Zhang,Zhihui Niu,Zhuo Wang 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.13
Blueberry residue is usually discarded as waste,but has a high anthocyanins content. The extraction methodof anthocyanins from blueberry residue with ultrasonicassisted dual-aqueous phase system was optimized. Interms of the principle of central group and design (CCD)experimental design, three-factor and five-level responsesurface analysis was adopted to optimize the extractionconditions with the extraction rate of anthocyanins. Theoptimum extraction rate of anthocyanin was12.372 ± 0.078 mg/g. Anthocyanin extract could protectthe pBR322 DNA oxidative damage induced by Fentonreagent, increase the superoxide dismutase(SOD) and glutathioneperoxidase (GSH-Px) enzyme activities, anddecrease the H2O2-induced cell apoptosis of human normalliver cell (LO2 cell). The study indicates that the extractionrate of anthocyanin was increased by optimized ultrasonicassisted dual-aqueous phase system. The anthocyaninextract could protect DNA and LO2 cell from oxidativedamage.
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Yuan Gao,Yubin Ji,Wenlan Li,Fuling Wang,Fuling Wang,Xiaomeng Zhang,Zhihui Niu,Lulu Zhou,Lijun Yan 한국식품영양과학회 2021 Journal of medicinal food Vol.24 No.2
This study focused on the antibacterial effects of the endophytic fungi producing naringenin from Dalbergia odorifera T. Chen against Staphylococcus aureus. The antibacterial activity was measured by the inhibition diameters, minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC). The time-killing curve was also used to evaluate its antibacterial efficacy. The results of antibacterial activity determinations showed that endophytic fungi secondary metabolites can inhibit the growth of five pathogenic bacteria (S. aureus, Escherichia coli, Salmonella enteritidis, Pseudomonas aeruginosa, and Bacillus subtilis) and the most sensitive strain was S. aureus that had the MIC and MBC values of 0.13 and 0.50 mg/mL, respectively. The membrane permeability study was measured by a DNA leakage assay and electrical conductivity assay. Furthermore, the whole-cell protein lysates and DNA fragmentation assay was evaluated. The morphology of S. aureus treated with the endophytic fungi products was observed by scanning electron microscopy (SEM). The probable antibacterial mechanism of endophytic fungi secondary metabolites was the increased membrane permeability that leads to leaks of nucleic acids and proteins. SEM results further confirmed that the extracts can interfere with the integrity of S. aureus cell membrane and further inhibit the growth of bacteria, resulting in the death of bacteria. This study provides a new perspective for the antibacterial functions of endophytic fungi secondary metabolites for biomedical applications.
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Design and properties analysis of total internal reflection gratings for pulse compressor at 1053 nm
Qunyu Bi,Jiangjun Zheng,Ailin Guo,Meizhi Sun,Jianpeng Wang,Fuling Zhang,Qingwei Yang,Xinglong Xie,Zunqi Lin 한국물리학회 2011 Current Applied Physics Vol.11 No.1
High-efficiency compression gratings based on total internal reflection (TIR) are promising alternatives of compressor gratings because of their high diffraction efficiency, potential high damage resistant ability,and compact structure. Dependence of the 1 order diffraction efficiencies on grating parameters is analyzed for TE- and TM-polarized incident light of 1053 nm at Littrow angle, which is calculated by using the rigorous coupled-wave analysis. A more intuitional view on the relation is offered through three-dimensional slicing figures instead of two-dimensional ones. The performances of high-efficiency gratings are compared and regarded as criteria for further choices, including spectral bandwidth, angle bandwidth, dispersion, and intensity distribution. For TE- and TM-irradiations, similar spectral bandwidth and angle bandwidth can be achieved by different grating parameters. However, the computer simulation result on the intensity distributions of the two polarized waves shows that such design should be used under the illumination of TE-polarized wave for lower intensity enhancement ratio,which is an important factor related to the gratings’ damage threshold.
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