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PtCu_(3) nanoalloy@porous PWO_(x) composites with oxygen container function as efficient ORR electrocatalysts advance the power density of room-temperature hydrogen-air fuel cells

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Nano Research 2022年第10期15卷 9010-9018页

作者： Rui Chen Tie Shu Fengling Zhao yongfei Li Xiaotong Yang Jingwei Li Daliang Zhang Li-yong Gan Ke Xin Yao qiang Yuan State-Local Joint Laboratory for Comprehensive Utilization of Biomass Center for R&D of Fine ChemicalsCollege of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China Multi-scale Porous Materials Center Institute of Advanced Interdisciplinary Studies&School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 400044China College of Physics and Center of Quantum Materials and Devices Chongqing UniversityChongqing 401331China

It is challenging and desirable to construct Pt-based nanocomposites with oxygen storage function as efficient oxygen reduction reaction(ORR)catalysts for practical proton exchange membrane fuel cells(PEMFCs).Herein,we achieve novel porous nanocomposites of PtCu_(3) nanoalloys-embedded in the PWO_(x) matrix(PtCu_(3)@PWO_(x)),which has an oxygen container *** PtCu_(3)@PWO_(x)/C exhibits an ultrahigh mass activity(MA)of 3.94 A·mgPt−1 for ORR,which is 26.3 times as high as the commercial Pt/C and the highest value ever reported for PtCu-based binary *** calculations reveal that the compressive strain and d-band center downshift of Pt intrinsically contribute to the excellent ORR *** H_(2)-air PEMFCs at room temperature,furthermore,the PtCu_(3)@PWO_(x)/C delivers a high power density(218.6 mW·cm^(−2)),much superior to commercial Pt/C(131.6 mW·cm^(−2)).In H_(2)-O_(2) PEMFCs,PtCu_(3)@PWO_(x)/C outputs a maximum power density of 420.1 mW·cm^(−2).This work provides an effective idea for designing oxygen-storing ORR catalysts used for practical room-temperature H_(2)-air fuel cells.

关键词： porous composite platinum-copper alloy oxygen container oxygen reduction reaction hydrogen-air fuel cell

Stable titanium metal-organic framework with strong binding affinity for ethaneremoval

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Chinese Journal of Chemical Engineering 2022年第2期35卷 35-41页

作者： Puxu liu yong Wang Yang Chen Xiaoqing Wang Jiangfeng Yang Libo Li Jinping Li College of Chemistry and Chemical Engineering Shanxi Key Laboratory of Gas Energy Efficient and Clean UtilizationTaiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Coal Science and Technology Taiyuan University of TechnologyTaiyuan 030024China

Direct separation of high purity ethylene(C_(2)H_(4))from an ethane(C_(2)H_(6))/ethylene mixture is a critical and challenging task owing to the very similar molecular size and physical properties of the two *** some studies have attempted this separation,there is a lack of excellent porous materials with strong binding affinity for C_(2)H_(6)-selective adsorption via an energy-efficient adsorptive separation ***,we report a titanium metal-organic framework with strong binding affinity and excellent stability for the highly efficient removal of C_(2)H_(6) from C_(2)H_(6)/C_(2)H_(4) *** component adsorption isotherms demonstrated a larger amount of adsorbed ethane(1.16 mmol·g^(-1) under 1 kPa)and high C_(2)H_(6)/C_(2)H_(4) selectivity(2.7)for equimolar C_(2)H_(6)/C_(2)H_(4) mixtures,especially in the low-pressure range,which is further confirmed by the results of grand canonical Monte Carlo simulations for C_(2)H_(6) adsorption in this *** experimental breakthrough curves showed that C_(2)H_(4) with a high purity was collected directly from both 1:9 and 1:15 C_(2)H_(6)/C_(2)H_(4)(volume ratio)mixtures at 298 K and 100 ***,the unchanged adsorption and separation performance after cycling experiments confirmed the promising applicability of this material in future.

关键词： Titanium metal-organic framework Adsorption Separation Ethylene purification Strong binding affinity Molecular simulation

阿拉善盟额济纳旗水资源风险评估现状研究及应对策略

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内蒙古科技与经济 2024年第3期 89-92页

作者：王蔷刘志勇陈改香叶茹罕内蒙古自治区国土空间规划院内蒙古呼和浩特010010

文章以阿拉善盟额济纳旗为例,研究选取危险性、暴露性、脆弱性和防灾减灾能力4个影响因素共15个评价因子,构建了区域水资源风险评价指标体系,运用自然灾害指数法、加权综合平均法和分级赋值法等方法,对额济纳旗水资源风险进行综合评价... 详细信息

文章以阿拉善盟额济纳旗为例,研究选取危险性、暴露性、脆弱性和防灾减灾能力4个影响因素共15个评价因子,构建了区域水资源风险评价指标体系,运用自然灾害指数法、加权综合平均法和分级赋值法等方法,对额济纳旗水资源风险进行综合评价并划分风险等级,并根据研究结果提出了应对策略,以推动额济纳旗资源环境的可持续利用和社会、经济高质量发展。

关键词：额济纳旗水资源风险评估建议

A sandwiched patch toward leakage-free and anti-postoperative tissue adhesion sealing of intestinal injuries

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Bioactive Materials 2023年第6期24卷 112-123页

作者： Wei Yang Chengkai Xuan Xuemin liu qiang Zhang Kai Wu Liming Bian Xuetao Shi National Engineering Research Centre for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou510006China School of Materials Science and Engineering South China University of TechnologyGuangzhou510640China Key Laboratory of Biomedical Engineering of Guangdong Province South China University of TechnologyGuangzhou510006China Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education South China University of TechnologyGuangzhou510006China School of Biomedical Sciences and Engineering South China University of TechnologyGuangzhou International CampusGuangzhou511442China Guangzhou Soonheal Medical Technology.Co LtdGuangzhou510230China

Ideal repair of intestinal injury requires a combination of leakage-free sealing and postoperative ***,neither conventional hand-sewn closures nor existing bioglues/patches can achieve such a *** this end,we develop a sandwiched patch composed of an inner adhesive and an outer antiadhesive layer that are topologically linked together through a reinforced *** inner adhesive layer tightly and instantly adheres to the wound sites via-NHS chemistry;the outer antiadhesive layer can inhibit cell and protein fouling based on the zwitterion structure;and the interlayer enhances the bulk resilience of the patch under excessive *** complementary trilayer patch(TLP)possesses a unique combination of instant wet adhesion,high mechanical strength,and biological *** rat and pig models demonstrate that the sandwiched TLP can effectively seal intestinal injuries and inhibit undesired postoperative tissue *** study provides valuable insight into the design of multifunctional bioadhesives to enhance the treatment efficacy of intestinal injuries.

关键词： Trilayer patch Bioadhesives Preventing postoperative adhesion Antiadhesion Intestinal injuries

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公立医院康复全院化模式的实践与探索

中国社区医师 2024年第15期40卷 167-169页

作者：阴涛王兴玲郑遵成高强刘晶青岛大学附属泰安市中心医院山东泰安271000

学科建设、运营管理是公立医院实现高质量发展的“两架马车”,康复医学以“患病后的功能障碍”为治疗重点,以患者回归家庭、社会为目标,康复医疗服务模式的推进能够体现公立医院的社会效益和高质量发展成效。康复全院化模式探索康复专... 详细信息

学科建设、运营管理是公立医院实现高质量发展的“两架马车”,康复医学以“患病后的功能障碍”为治疗重点,以患者回归家庭、社会为目标,康复医疗服务模式的推进能够体现公立医院的社会效益和高质量发展成效。康复全院化模式探索康复专业与临床各学科的合作模式,能够推动康复亚专科的发展与成熟,优化康复诊疗服务,改善住院质控指标,是实现患者就诊全流程康复服务的重要举措。

关键词：公立医院康复全院化高质量发展运营模式

通过整合的生物信息学方法鉴定H和L型血管内皮细胞中的ceRNA网络

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中南大学学报（医学版） 2024年第4期49卷 562-577页

作者：刘志阮哲龙海涛赵瑞波朱勇林涨源陈鹏赵树山中南大学湘雅医院骨科长沙410008 国家老年疾病临床医学研究中心(湘雅医院) 长沙410008

目的:H型血管是一种骨特异性微血管亚型(CD31hiEmcnhi),在成血管-成骨耦联机制中具有重要的调节作用。研究报道H和L型血管在骨骼生理和病理条件下发挥不同的作用,它们之间的遗传差异仍有待阐明。本研究旨在通过整合的生物信息学方法构建... 详细信息

目的:H型血管是一种骨特异性微血管亚型(CD31hiEmcnhi),在成血管-成骨耦联机制中具有重要的调节作用。研究报道H和L型血管在骨骼生理和病理条件下发挥不同的作用,它们之间的遗传差异仍有待阐明。本研究旨在通过整合的生物信息学方法构建H和L型血管内皮细胞中关键差异表达(differential expression,DE)基因的竞争性内源RNA(competitive endogenous RNA,ceRNA)网络。方法:从ArrayExpress和基因表达综合(Gene Expression Omnibus,GEO)数据库中下载相关原始数据,通过Limma R-Bioconductor包筛选H和L型血管间的DE lncRNAs、DE miRNAs和DE mRNAs,构建总ceRNA网络,随后根据蛋白质相互作用(protein-protein interaction,PPI)网络筛选出上调和下调的关键基因,以此精细化ceRNA网络并对关键基因进行富集分析。最后,通过流式细胞术和real time RT-PCR进行随机验证。结果:共鉴定出1 761个DE mRNAs、187个DE lncRNAs和159个DE miRNAs,通过相互作用关系构建总ceRNA网络;通过PPI网络筛选出6个上调(Itga5、Kdr、Tjp1、Pecam1、Cdh5、Ptk2)和2个下调(Csf1r、Il10)的关键基因,并以此构建关键基因相关的ceRNA亚网络。上调的关键基因主要富集在血管生成与血管凋亡的负调控;流式细胞术和real-time RT-PCR的结果与生物信息学分析结果一致。结论:本研究根据所筛选的关键基因提出上调和下调的H型和L型血管内皮细胞相关的ceRNA网络,为H型和L型血管内皮细胞在骨代谢中的调控机制提供了新见解。

关键词：骨骼血管 H型血管内皮细胞 ceRNA网络生物信息学

350 MW汽轮机组三段抽汽温度高原因分析及处理措施

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电力系统装备 2024年第5期 118-120页

作者：王强刘国超代拥军李军强新疆东方希望有色金属有限公司新疆昌吉831100

近年来,火电企业通过热电联产实现了节本降耗、提质增效及产出综合效益目标,目前正值此类企业高质量运营阶段,应持续提升其全要素生产率。文章以此为背景,针对某有色金属有限公司350 MW汽轮机组三段抽汽温度高现象,分别从技改方案与处... 详细信息

近年来,火电企业通过热电联产实现了节本降耗、提质增效及产出综合效益目标,目前正值此类企业高质量运营阶段,应持续提升其全要素生产率。文章以此为背景,针对某有色金属有限公司350 MW汽轮机组三段抽汽温度高现象,分别从技改方案与处理效果两大方面对其处理措施进行了具体探讨。

关键词： 350 MW汽轮机组三段抽汽温度原因处理措施

Enhanced Mn^(2+)solidification and NH_(4)^(+)-N removal from electrolytic manganese metal residue via surfactants

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Chinese Journal of Chemical Engineering 2022年第9期35卷 205-212页

作者： Jiancheng Shu Xiangfei Zeng Danyang Sun yong Yang Zuohua liu Mengjun Chen Daoyong Tan School of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China

Electrolytic manganese metal residue(EMMR)harmless treatment has always lacked a low-cost and quick processing *** this study,surfactants,namely tetradecyl trimethylammonium chloride(TTC),sodium dodecyl benzene sulfonate(SDBS),sodium lignin sulfonate(SLS),and octadecyl trimethylammonium chloride(OTC),were used in the solidification of Mn^(2+)and removal of NH_(4)^(+)-N from *** Mn^(2+)and NH_(4)^(+)-N concentrations under different reaction conditions,Mn^(2+)solidification and NH_(4)^(+)-N removal mechanisms,and leaching behavior were *** results revealed that the surfactants could enhance the Mn^(2+)solidification and NH_(4)^(+)-N removal from EMMR,and the order of enhancement was as follows:TTC>SDBS>OTC>*** NH_(4)^(+)-N and Mn^(2+)concentrations were 12.3 and 0.05 mg·L^(-1)with the use of 60.0 mg·kg^(-1)TTC under optimum conditions(solid–liquid ratio of 1.5:1,EMMR to BRM mass ratio of 100:8,temperature of 20℃,and reaction duration of 12 h),which met the integrated wastewater discharge standard(GB8978-1996).Mn^(2+)was mainly solidified as Mn(OH)_(2),MnOOH and MnSiO_(3),and NH_(4)^(+)-N in EMMR was mostly removed in the form of *** results of this study could provide a new idea for cost-effective EMMR harmless treatment.

关键词： Electrolytic manganese metal residue Mn^(2+)solidification NH_(4)^(+)-N removal Surfactants

杭州市县域土地利用碳排放时空格局及影响因素研究

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科技与管理 2020年第1期22卷 1-9页

作者：李泽坤任丽燕马仁锋刘永强姚丹宁波大学地理与空间信息技术系浙江宁波315211

基于2005、2010、2015年杭州市县域单元土地利用数据和能源消耗数据,分析了土地利用碳排放的时空演变特征,并利用LMDI因素分解法对土地利用碳排放的影响因素进行分析。结果表明:杭州市土地利用碳排放逐渐增加,城镇用地、农村居民点用地... 详细信息

基于2005、2010、2015年杭州市县域单元土地利用数据和能源消耗数据,分析了土地利用碳排放的时空演变特征,并利用LMDI因素分解法对土地利用碳排放的影响因素进行分析。结果表明:杭州市土地利用碳排放逐渐增加,城镇用地、农村居民点用地和工业及其他建设用地的碳排放量逐渐增加,耕地碳排放在减少。从土地利用碳排放结构看,工业及其他建设用地的碳排放量最大,其次为城镇用地、耕地和农村居民点用地。不同县域单元土地利用碳排放结构及变化不尽相同。杭州市城镇用地和工业及其他建设用地碳排放呈现东北高、西南低的空间分布特征;农村居民点用地碳排放呈现东北高和西南高、中部低、主城区最低的空间分布特征;耕地碳排放呈现东北高、西南低、主城区最低的空间分布特征。总体上,土地利用变化和土地利用集约度对土地利用碳排放起抑制作用,经济发展因素和人口因素起促进作用,但不同因素在不同时期、不同县域单元的作用强度和作用方向不尽相同。

关键词：土地利用碳排放 LMDI 县域杭州市