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Nitrogen-rich Graphdiyne Film for Efficiently Suppressing the Methanol Crossover in Direct Methanol Fuel Cells

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Chemical Research in Chinese Universities 2021年第6期37卷 1275-1282页

作者： LI Liang ZUO Zicheng HE feng JIANG Zhongqing LI yuliang Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou310018P.R.China

The inhibition of the methanol crossover is one of the intractable challenges in the direct methanol fuel *** graphdiyne(GDY)with atomic-level pores shows great potential in realizing the zero-permeation of methanol *** this paper,an ultrathin layer of nitrogen-rich GDY film with a high nitrogen content is largely prepared and readily used for retarding the methanol permeation in the state-of-the-art commercial Nafion *** high N-content in this porous GDY nanofilm remarkably increases the selective suppression in methanol transfer,and single-layer GDY film can efficiently prevent 43%methanol crossover and the value of the double-layer GDY film can be high up to 69%.The power performance and the long-term stability of the cell are obviously improved due to the reduced methanol crossover.

关键词： Direct methanol fuel cell(DMFC) Methanol crossover Nafion membrane Graphdiyne

健康指导员干预南充地区居民健康素养的效果分析

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预防医学情报杂志 2024年第11期40卷 1403-1408页

作者：冯宇梁朱陶罗章洪程波肖伟张树山川北医学院附属医院神经内科四川南充637000 川北医学院公共卫生学院四川南充637000

目的通过健康指导员对南充地区居民进行多元化健康素养干预并评价其干预效果,同时筛选重点干预人群,为推广提高居民健康素养水平的健康指导员干预模式提供参考依据。方法于2023年1月至2024年2月,采用分层随机抽样的方法,在南充市顺庆区... 详细信息

目的通过健康指导员对南充地区居民进行多元化健康素养干预并评价其干预效果,同时筛选重点干预人群,为推广提高居民健康素养水平的健康指导员干预模式提供参考依据。方法于2023年1月至2024年2月,采用分层随机抽样的方法,在南充市顺庆区、嘉陵区和高坪区共抽取6个社区和6个乡镇,每个社区和乡镇招募4~6名健康指导员,共招募60名并对其进行统一培训,培训合格后对其所在社区/乡镇的居民进行健康相关知识和技能的指导干预。每名健康指导员至少干预20名所在地的居民,干预前后分别纳入1147名居民并对其进行健康素养问卷调查。采用χ^(2)检验分析干预前后健康素养水平的差异,以P<0.05为差异有统计学意义。结果南充地区居民的总体健康素养水平在健康指导员干预前、干预后即刻及干预后第6个月随访分别为23.7%、29.8%和27.8%。南充地区居民总体健康素养水平和健康知识水平在健康指导员干预后即刻及干预后第6个月随访均高于干预前,且差异均有统计学意义(P均<0.05)。具有农村地区、女性、初中及以下学历、农民、家庭人均年收入低于6000元、合并慢病等人口学特征的南充地区居民干预后第6个月随访的健康素养水平均高于干预前,且差异均有统计学意义(P均<0.05)。结论健康指导员干预可有效提高南充地区居民总体健康素养水平,但短期干预对健康技能和行为影响较小;农民、女性、学历低、家庭人均年收入低和合并慢病的居民是实施干预的重点人群。

关键词：健康指导员居民健康素养干预

微量La改善GH141超合金热塑性的数字X射线图像分析

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钢铁研究总院学报 1987年第3期 77-84页

作者：韩临光陆玉良冯燕萍高玲戴正平

采用分析电镜及PV9201区域作图功能,检测镍基GH141高温合金加入La后的组织特征和La的分布,取得了满意的结果。对于阐明微量La显著改善合金的热塑性,提供了可信的根据。同时,通过该项实验,也充分显示了数字X射线图像的优越性。观察发现,... 详细信息

采用分析电镜及PV9201区域作图功能,检测镍基GH141高温合金加入La后的组织特征和La的分布,取得了满意的结果。对于阐明微量La显著改善合金的热塑性,提供了可信的根据。同时,通过该项实验,也充分显示了数字X射线图像的优越性。观察发现,本合金由于添加微量La元素,组织中多出现具有核心的物相结构。经鉴定,核心部份为La-O或La-O-S化合物,其周围包以MC型一次碳化物。此种结构的形成,分散并球化了原来粗大的长片状碳化物。这是合金热塑性得以提高的主要机理。

关键词：射线图像热塑性 La 一次碳化物

Hot Working Characteristic of Superaustenitic Stainless Steel 254SMO

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Acta Metallurgica Sinica(English Letters) 2014年第2期27卷 313-323页

作者： Enxiang Pu Wenjie Zheng Jinzhong Xiang Zhigang Song Han feng yuliang Zhu School of Physics Science and Technology Yunnan University Central Iron and Steel Research Institute

Abstract Hot deformation characteristic of superaustenitic stainless steel 254SMO has been studied by isothermal compression testing in the temperature range of 950-1,200 ℃ and strain rate range of 0.01-10 s^-1. The activation energy of 496 kJ/mol was calculated by a hyperbolic-sine type equation over the entire range of strain rates and temperatures. In order to obtain optimum hot working conditions, processing maps consisting of power dissipation map and instability map were constructed at different strains. The power dissipation map exhibits two domains with relatively high efficiencies of power dissipation. The first domain occurs in the temperature range of 990-1,070 ~C and the strain rate range of 0.01-0.1 s^-1. Microstructure observation in this domain indicates the partial dynamic recrystallization （DRX） accompanied with precipitation of tetragonal sigma phase. The second domain occurs in the temperature range of 1,140-1,200 ℃ and the strain rate range of 0.01-1 s^-1 with a peak efficiency of power dissipation of 39%, and in this domain, the microstructure observation reveals the full DRX. The instability map shows that flow instability occurs at the temperatures below 1,140 ℃ and the strain rates above 0.1 s^-1.

关键词： Processing map 254SMO Superaustenitic stainless steel Hot deformation

Ir0/graphdiyne atomic interface for selective epoxidation

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National Science Review 2023年第8期10卷 173-179页

作者： Zhiqiang Zheng Lu Qi Yaqi Gao Xiaoyu Luan Yurui Xue feng He yuliang Li Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Science Center for Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong University CAS Key Laboratory of Organic Solids Institute of ChemistryChinese Academy of Sciences School of Chemical Sciences University of Chinese Academy of Sciences

The development of catalysts that can selectively and efficiently promote the alkene epoxidation at ambient temperatures and pressures is an important promising path to renewable synthesis of various chemical products. Here we report a new type of zerovalent atom catalysts comprised of zerovalent Ir atoms highly dispersed and anchored on graphdiyne(Ir0/GDY) wherein the Ir0is stabilized by the incomplete charge transfer effect and the confined effect of GDY natural cavity. The Ir0/GDY can selectively and efficiently produce styrene oxides(SO) by electro-oxidizing styrene(ST) in aqueous solutions at ambient temperatures and pressures with high conversion efficiency of ～100%, high SO selectivity of 85.5%, and high Faradaic efficiency(FE) of 55%. Experimental and density functional theory(DFT) calculation results show that the intrinsic activity and stability due to the incomplete charge transfer between Ir0and GDY effectively promoted the electron exchange between the catalyst and reactant molecule, and realized the selective epoxidation of ST to SO. Studies of the reaction mechanism demonstrate that Ir0/GDY proceeds a distinctive pathway for highly selective and active alkene-to-epoxide conversion from the traditional processes. This work presents a new example of constructing zerovalent metal atoms within the GDY matrix toward selective electrocatalytic epoxidation.

关键词： graphdiyne atom catalyst atomic interface selective epoxidation high-performance

Engineering hierarchical metal-organic@metal-DNA heterostructures for combinational tumor treatment

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Nano Research 2023年第11期16卷 12633-12640页

作者： Xueyan feng Bei Liu Zehao Zhou Wei Li Jian Zhao Lele Li yuliang Zhao CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety National Center for Nanoscience and TechnologyBeijing 100190China College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Department of Nanomedicine&Shanghai Key Lab of Cell Engineering Naval Medical UniversityShanghai 200433China

Development of simple methods for controlled integration of DNA molecules with metal-organic frameworks(MOFs)is important for various biomedical applications,yet remains a ***,a simple and general approach to load DNA on the surface of MOFs is developed via one-pot self-assembly of DNA and FeII ions on nanoscale MOFs,resulting in hierarchical core-shell nanostructures of metal-organic@metal-DNA coordination *** strategy enables assembly of DNA molecules on MOFs with ultra-high contents and precise *** incorporation of a chemotherapeutic drug into the Fe-DNA shell,the systems allow to integrate chemotherapy and gene therapy with photodynamic therapy for combinational tumor ***,the hybrid nanostructures enable light-triggered production of cytotoxic singlet oxygen,which further boosts the endosomal escape of the system for an enhanced gene silencing efficacy and thus improved therapeutic *** work highlights a robust approach for the construction of coordination-based drug delivery systems to combat tumor.

关键词： metal-organic frameworks DNA hierarchical nanostructures coordination combinational tumor treatment

血管紧张素转化酶2在结直肠癌中的表达及意义

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浙江医学 2020年第11期42卷 1154-1157,I0007,I0008页

作者：董惠王卫峰冯玉良朱琴丛衍群张虹郑培奋浙江医院消化科杭州310013

目的探讨血管紧张素转化酶2(ACE2)在结直肠癌中的表达及意义。方法利用Oncomine数据库(http://***/resource)、人类蛋白质图谱(HPA)数据库(http://***/)、GEPIA数据库(http://***)提取数据,比较结直肠癌组织与正常结直肠组织中ACE2表达... 详细信息

目的探讨血管紧张素转化酶2(ACE2)在结直肠癌中的表达及意义。方法利用Oncomine数据库(http://***/resource)、人类蛋白质图谱(HPA)数据库(http://***/)、GEPIA数据库(http://***)提取数据,比较结直肠癌组织与正常结直肠组织中ACE2表达,分析ACE2基因表达量与错配修复基因表达量的相关性,同时比较结直肠癌患者ACE2基因高、低表达组生存率。结果结直肠癌组织中ACE2基因表达量较正常结直肠组织明显下调(P0.05)。结论ACE2蛋白在结直肠癌组织中呈高表达,对结直肠癌患者的生存无明显影响,但与涉及结直肠癌发生的错配修复基因表达关系密切。

关键词：血管紧张素转化酶2 结直肠癌表达预后

Controlled Growth Interface of Charge Transfer Salts of Nickel- 7,7,8,8-Tetracyanoquinodimethane on Surface of Graphdiyne

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CCS Chemistry 2023年第4期5卷 971-981页

作者： Yuxin Liu Yang Gao feng He Yurui Xue yuliang Li Institute of Chemistry Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 Science Center for Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringInstitute of Frontier and Interdisciplinary ScienceShandong UniversityJinan 250100

Here we report an in situ assembly growth method that controls the growth of NiTCNQ on the surface of graphdiyne(GDY).The catalytic system of donor–acceptor–donor(GDY/TCNQ/Ni)structure with multiple charge transfer(CT)was achieved by controlling the growth of NiTCNQ on the surface of ***,a controlled double layer interface of GDY/TCNQ/Ni was *** system implemented simultaneously the two elements we expected(1)an incomplete CT,and(2)the infinite distribution of active sites originating from highly asymmetric surface charge *** high conductivity and typical semiconductor characteristics of the catalyst endows it with high catalytic *** found that an electrolytic cell consisting of the CT salt as a catalyst provided a 1.40 V ultra-small cell voltage up to 10 mA cm−2 and the outer GDY film effectively prevented the corrosion of the *** study is the first to introduce CT complexes to a novel catalytic material platform for high selectivity of catalysts,and undoubtedly demonstrates the high selectivity,stability,and activity of such catalytic systems,which provides a new space for the development of novel conceptual catalysts.

关键词： graphdiyne charge transfer salts donor-acceptor-donor structure overall water splitting

新型冠状病毒抗原自测应用于隔离人员筛查的初步评价

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国际病毒学杂志 2022年第5期29卷 374-377页

作者：杨慧萍徐佳楠刘李冯玉亮黄忠平潘明四川省疾病预防控制中心微生物检验所成都610041

目的对新型冠状病毒(severe acute respiratory syndrome coronavirus 2,SARS-CoV-2)抗原检测试剂盒(胶体金免疫层析法)进行临床评价,初步评价其应用于隔离人员筛查的效果。方法采集172位隔离人员的临床平行样本(分别用于核酸和抗原检测... 详细信息

目的对新型冠状病毒(severe acute respiratory syndrome coronavirus 2,SARS-CoV-2)抗原检测试剂盒(胶体金免疫层析法)进行临床评价,初步评价其应用于隔离人员筛查的效果。方法采集172位隔离人员的临床平行样本(分别用于核酸和抗原检测)共516份,由研究人员和隔离人员分别采用胶体金免疫层析法进行SARS-CoV-2抗原的快速检测,同时在实验室进行核酸检测,计算阳性符合率、阴性符合率、总符合率和Kappa值。结果两种方法的总符合率为91.86%(95%CI:86.80%~95.09%),一致性分析Kappa系数为0.527(95%CI:0.318~0.736),0.4≤Kappa0.8。结论胶体金免疫层析法检测SARS-CoV-2抗原在发病初期及病毒载量较高时有较好的检测效果,可应用于对隔离人员的现场筛查。但鉴于其方法的局限性,结果只能作为初步参考,最终的确认结果应以实时荧光PCR法结果为准。

关键词：新型冠状病毒抗原检测隔离人员