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| 1 | In situ grown nanoscale platinum on carbon powder as catalyst layer in proton exchange membrane fuel cells(PEMFCs)显示文摘An extensive study has been conducted on the proton exchange membrane fuel cells(PEMFCs) with reducing Pt loading.This is commonly achieved by developing methods to increase the utilization of the platinum in the catalyst layer of the electrodes.In this paper,a novel process of the catalyst layers was introduced and investigated.A mixture of carbon powder and Nafion solution was sprayed on the glassy carbon electrode(GCE) to form a thin carbon layer.Then Pt particles were deposited on the surface by reducing hexachloroplatinic(Ⅳ) acid hexahydrate with methanoic acid.SEM images showed a continuous Pt gradient profile among the thickness direction of the catalytic layer by the novel method.The Pt nanowires grown are in the size of 3 nm(diameter) x 10 nm(length) by high solution TEM image.The novel catalyst layer was characterized by cyclic voltammetry(CV) and scanning electron microscope(SEM) as compared with commercial Pt/C black and Pt catalyst layer obtained from sputtering.The results showed that the platinum nanoparticles deposited on the carbon powder were highly utilized as they directly faced the gas diffusion layer and offered easy access to reactants(oxygen or hydrogen). | Sheng Sui Xiaolong Zhuo Kaihua Su Xianyong Yao Junliang Zhang Shangfeng Du Kevin Kendall | 2013 | Journal of Energy Chemistry2013，22，3： | 2 |
| 2 | Spectra, magnetic property and coordination structure study on polymeric copper (I1) iodo complex of diethylenetriamine 显示文摘 | Li Jianmin Yao Shangfeng Che Huidong | 1996 | Spectrosc Lett1996，29，8： | 1 |
| 3 | Screening for Anti-tumor Activity of Fractions from Buddleja officinalis Maxim显示文摘[Objectives]The anti-tumor activity of fractions from Buddleja officinalis Maxim.by petroleum ether,ethyl acetate,n-butanol and water solvent was studied.[Methods]The ethanol extract from B.officinalis Maxim.was extracted and then concentrated with petroleum ether,ethyl acetate,n-butanol and water,respectively,and the extracts were obtained.The inhibitory effects of the four different fractions on the growth of three tumor cell lines in vitro were detected by CCK-8 method,and the median inhibitory concentration(IC 50 value)was calculated.[Results]The four fractions inhibited the growth of the three tumor cell lines in vitro,among which the n-butanol fraction had the best anti-tumor activity.The IC 50 values of the n-butanol fraction on human gastric cancer(SGC-7901),human breast cancer(MCF-7)and human liver cancer(BEL-7404)cell lines were 0.08,1.58 and 0.12 mg/mL,respectively.[Conclusions]Petroleum ether,ethyl acetate,n-butanol and water fractions from the ethanol extract of B.officinalis Maxim.had certain anti-tumor effects,and the n-butanol fraction had the best anti-tumor activity. | Tong LI Xin XIE Liyuan LI Aipeng LI Zhidong LEI Tingting HE Sirui MO Shangfeng HUANG Yao LIN Suoyi HUANG Lixiang LU Shiyou ZHOU | 2024 | Medicinal Plant2024，15，2： | 0 |
| 4 | Personal Credit Risk .Scoring Model Based on Rough Set and Neural Network显示文摘 | Hui Lu Shangfeng Yao | 2008 | Journal of Systems Science and Information2008，6，4： | 0 |
| 5 | Preventive behaviours and family inequalities during the COVID-19 pandemic:a cross-sectional study in China显示文摘Background The coronavirus disease 2019(COVID-19)pandemic is an international public health threat,and people's participation in disease-related preventive behaviours is the key to controlling infectious diseases.This study aimed to assess the differences in adopting preventive behaviours among populations to explore potential individual and household factors and inequalities within families.Methods This online survey was conducted in April 2020.The directional stratified convenient sampling method was used to select 4704 participants from eight provinces in eastern,central,and western China.The questionnaire included demographic information,household variables,and five target prevention behaviours.The chi-squared test,binary multilevel model,and Mantel–Haenszel hierarchical analysis were used for data analysis in the study.Results Approximately 71.2%of the participants had appropriate outdoor prevention,and 32.9%of the participants had indoor protection in place.Sharing behaviours(P<0.001)and education level(P<0.001)were positively associated with adopting preventive measures.The inhibiting effect of household crowding and stimulating effect of high household income on preventive behaviours were determined in this study.Household size was negatively associated with living area(β=-0.057,P<0.05)and living style(β=-0.077,P<0.05).Household income was positively associated with age(β=0.023,P<0.05),and relationship with friends(β=0.053,P<0.05).Vulnerable groups,such as older adults or women,are more likely to have inadequate preventive behaviours.Older adults(OR=1.53,95%CI 1.09–2.15),women(OR=1.37,95%CI 1.15–1.64),and those with more than 2 suspected symptoms(OR=1.85,95%CI 1.07–3.19)were more likely to be affected by the inhibiting effect of household crowding,while the stimulating effect of high household income was limited in these groups.Conclusions Inequalities in COVID-19 prevention behaviours exist between families and inadequate adoption of prevention by vulnerable groups are noteworthy.This study expands the research perspective by emphasizing the role of household factors in preventive behaviours and by focusing on family inequalities.The government should use traditional media as a platform to enhance residents’public health knowledge.Targeted additional wage subsidies,investments in affordable housing,financial support for multigenerational households,and temporary relocation policies may deserve more attention.Communities could play a critical role in COVID-19 prevention. | Yisheng Ye Ruijun Wu Yao Ge Tao Wang Xin Yao Yao Yang Chengxu Long Fangfei Chen Shangfeng Tang Rui Huang | 2021 | Infectious Diseases of Poverty2021，10，4： | 0 |
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