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含碳铁泥基催化剂活化H_(2)O_(2)处理亚甲基蓝废水

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工业水处理 2024年第2期44卷 125-132页

作者：王俩吴霜程小双梁澜李宁陈冠益侯立安天津大学环境科学与工程学院天津300350 中环保水务投资有限公司北京100082 天津商业大学机械工程学院天津300134

利用铁泥基催化剂构建类Fenton体系可实现污水厂废弃铁泥的资源化利用。热解温度可调控催化剂表面金属和非金属位点组成,影响其对过氧化氢(H_(2)O_(2))的活化效果。对不同热解温度(400~700℃)下制备的催化剂进行形貌、组成、结构和活性... 详细信息

利用铁泥基催化剂构建类Fenton体系可实现污水厂废弃铁泥的资源化利用。热解温度可调控催化剂表面金属和非金属位点组成,影响其对过氧化氢(H_(2)O_(2))的活化效果。对不同热解温度(400~700℃)下制备的催化剂进行形貌、组成、结构和活性等方面的测试。研究发现,700℃下制备的催化剂活化H_(2)O_(2),在100 min内对亚甲基蓝(MB)降解率达92.0%。当热解温度在400~700℃范围内增大时,催化剂比表面积和C含量均增大。机理探究表明,催化剂表面的Fe0、C==C/C—C和C==O活性位点对活化H_(2)O_(2)发挥重要作用,有利于促进亚甲基蓝降解。此外,铁泥基催化剂/H_(2)O_(2)体系中羟基自由基(·OH)和单线态氧(^(1)O_(2))是主要活性物种,超氧自由基(O_(2)^(·-))发挥作用较小。

关键词：废弃铁泥类Fenton 染料废水

Instant formation of nanopores on flexible polymer membranes using intense pulsed light and nanoparticle templates

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International Journal of Smart and Nano Materials 2023年第4期14卷 391-405页

作者： Miaoning Ren Tianyu li Wenxing Huo Yu guo Zhiqiang Xia Ya lia Jing Niua M.Serdar Onses Xian Huang Department of Biomedical Engineering Tianjin UniversityTianjinChina ERNAM-Nanotechnology Research and Application Center Department of Materials Science and EngineeringErciyes UniversityKayseriTurkey

The development of simple and high-throughput approaches to yield solid-state nanopores on large surface membranes may facilitate the prevalence of nanopore analysis technology and in-vitro diagnosis using portable ***,solidstate nanopores are typically realized by complex and highend nanofabrication ***,we present a method to achieve nanopores on polymer membranes using,silver nanoparticles(AgNPs)as templates and intense pulsed light(IPL)as a heating *** density and size of nanopores are controllable by adjusting the spin coating rate,the concentration of nanoparticle suspension,and the size of nanoparticles(NPs).The temperature of the AgNPs can rapidly reach 1132 K under instant heating of photothermal effect through light irradiation in 2 ms,resulting in localized melting and decomposition of an underneath polycarbonate(PC)membrane to yield nanopores with sizes ranging from 10 to 270 *** removing the nanoparticle residues,the flexible membrane with nanopores can be integrated into a flow cell to achieve a nanopore sensor that has been used to measure the translocation behaviors of bovine serum albumin(BSA).The results have demonstrated the capability of the sensor in protein denaturation *** low-cost and highthroughput technique to fabricate solid-state nanopores on flexible polymeric membranes may facilitate the development of more nanopore-based flexible sensors that can be integrated with other flexible components for wearable diagnosis.

关键词： Solid-state nanopore intense pulsed light polymer AgNPs flexible membrane

关节镜下前交叉韧带重建术后早期疼痛管理的研究进展

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中国修复重建外科杂志 2024年第2期38卷 218-225页

作者：余鸿施政良熊波涵李雅娟秦艺华董开颜李彦林李黎昆明医科大学第一附属医院运动医学科昆明650032

目的总结前交叉韧带重建(anterior cruciate ligament reconstruction,ACLR)术后早期疼痛管理方式,为促进ACLR术后功能康复选择合理且有效的疼痛管理方案。方法广泛查阅近年国内外关于ACLR术后早期疼痛管理方案相关文献,并从改善术后疼... 详细信息

目的总结前交叉韧带重建(anterior cruciate ligament reconstruction,ACLR)术后早期疼痛管理方式,为促进ACLR术后功能康复选择合理且有效的疼痛管理方案。方法广泛查阅近年国内外关于ACLR术后早期疼痛管理方案相关文献,并从改善术后疼痛效果方面进行综述。结果目前物理治疗和口服药物有经济、简便等优势,但改善术后疼痛效果并不佳,常需要联合静脉注射或静脉泵等方式,也是目前缓解疼痛的常用方式;但为了满足患者镇痛需求,镇痛药物使用量往往较大,增加了各种不良反应发生风险。局部浸润镇痛(local infiltration analgesia,lia)包括关节周围或关节内注射药物,可显著改善ACLR术后早期疼痛,达到与神经阻滞相似的术后疗效;lia可作为代替神经阻滞的一种镇痛技术,并避免神经阻滞带来的相应支配肌肉无力,从而增加术后跌倒风险。其中关节周围注射镇痛效果更优,可避免关节内注射对软骨损伤的风险。但lia的术后镇痛效果和时效性仍有待提升,可考虑将多模式混合药物lia(联合关节内和关节周围)联合其他疼痛干预方式,发挥协同作用,以避免单一药物或单途径给药带来的副作用和风险,有望成为缓解ACLR术后早期疼痛常用方法之一。结论关节镜下ACLR术后仍会出现早期疼痛影响患者进一步功能活动,各种镇痛方式均可获得一定疗效,但目前尚未制定统一标准,各类镇痛方式优劣有待进一步研究。

关键词：前交叉韧带重建早期疼痛局部浸润镇痛神经阻滞功能康复

L-proline feeding for augmented freeze tolerance of Camponotus japonicus Mayr

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Science Bulletin 2019年第23期64卷 1795-1804页

作者： Mengjia Dou Yazhou li Ziqiao Sun Lei lia Wei Rao C4S Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China School of Energy and Power Engineering Beihang UniversityBeijing 100191China Beijing Engineering Research Center of Sustainable Energy and Buildings Beijing University of Civil Engineering and ArchitectureBeijing 100044China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory of Cryo-Biomedical Engineering Beijing 100190China

The successful cryopreservation of organs is a strong and widespread demand around the world but faces great challenges. The mechanisms of cold tolerance of organisms in nature inspirit researchers to find new solutions for these challenges. Especially, the thermal, mechanical, biological and biophysical changes during the regulation of freezing tolerance process should be studied and coordinated to improve the cryopreservation technique and quality of complex organs. Here the cold tolerance of the Japanese carpenter ants, Camponotus japonicus Mayr, was greatly improved by using optimal protocols and feeding on L-proline-augmented diets for 5 days. When cooling to -27.66 ℃, the survival rate of frozen ants increased from 37.50% ± 1.73% to 83.88% ± 3.67%. Profiling of metabolites identified the concentration of whole-body L-proline of ants increased from 1.78 to 4.64 ng g-1 after 5-day feeding. High Lproline level, together with a low rate of osmotically active water and osmotically inactive water facilitated the prevention of cryoinjury. More importantly, gene analysis showed that the expression of ribosome genes was significantly up-regulated and played an important role in manipulating freezing tolerance. To the best of our knowledge, this is the first study to link genetic variation to the enhancement of ants’ cold tolerance by feeding exogenous cryoprotective compound. It is worth noting that the findings provide the theoretical and technical foundation for the cryopreservation of more complex tissues,organs, and living organisms.

关键词： L-proline Cryopreservation Freeze tolerance Metabolomics gene expression

Stability analysis of underground mine hard rock pillars via combination of finite difference methods,neural networks,and Monte Carlo simulation techniques

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Underground Space 2021年第4期6卷 379-395页

作者： Chuanqi lia Jian Zhou Danial Jahed Armaghani Xibing li School of Resources and Safety Engineering Central South UniversityChangsha 410083China Department of Civil Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia

Pillar stability is always evaluated using the safety factor(SF),which is defined as the ratio of pillar strength to pillar ***,most researchers have estimated pillar stress using the pillar shape ratio(w/h),uniaxial compressive strength(UCS)of the intact rock mass,and pillar depth(H).In this study,the geological strength index(gSI)of hard rock pillars was considered as a new variable for predictive *** index was developed by combining numerical simulation software(i.e.,FLAC3D)and a backpropagation neural network(BPNN).A hard rock pillar stability analysis,based on three methods including deterministic method,sensitivity analysis,and Monte Carlo simulation(MCS),was performed.A new formula was proposed to estimate the SF values based on the predicted stress,considering the gSI variable in the deterministic *** sensitivity analysis indicated that the variables impacting the SF from high to low are UCS,gSI,w/h,and *** this study,pillar stability was analyzed mainly using the gSI and MCS *** MCS results revealed that the gSI is also a major factor in pillar stability and has a greater effect on weak pillars than on strong ***,a pillar is more likely to be unstable when both the gSI and the UCS are *** study provides several references and procedures for improving the design of stable pillars considering the gSI as an important factor.

关键词： Hard rock pillar Numerical simulation Neural networks Safety factor geological strength index Monte Carlo simulation

The Physical Chemistry for the Self-assembly of Peptide Hydrogels

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Chinese Journal of Polymer Science 2018年第3期36卷 366-378页

作者： Ying li Yi Cao Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and EngineeringJiangsu Engineering Technology Research Centre of Environmental Cleaning MaterialsJiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlJiangsu Joint Laboratory of Atmaspheric Pollution ControlNanjing University of Information Science&TechnologyNanjing 210044China Collaborative Innovation Center of Advanced Microstrucures National Laboratony of Solid State MicrostrucureDepartment of PhysicsNanjing UniversityNanjing 210093China

Peptide hydrogels have been widely used for diverse biomedical applications. However, our current understanding of the physical principles underlying the self-assembly process is still limited. In this review, we summarize our current understanding on the physical chemistry principles from the basic interactions that drive the self-assembly process to the energy landscapes that dictate the thermodynamics and kinetics of the process. We discuss the effect of different factors that affect the kinetics of the self-assembly of peptide fibrils and how this is related to the macroscopic gelation process. We provide our understanding on the molecular origin of the complex and rugged energy landscape for the self-assembly of peptide hydrogels. The hierarchical self-assembled structures and the diverse self-assembling mechanism make it difficult and challenging to rationally design the physical and chemical properties of peptide hydrogels at the molecular revel. We also give our personal perspective to the potential future directions in this field.

关键词： Hydrogel Peptide Self-assembly Kinetics Thermodynamics

Residue behaviors and dietary risk of cyazofamid in turnip,onion and romaine lettuce assessed by a QuEChERS-LC-MS/MS methods

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Food Science and Human Wellness 2023年第5期12卷 1538-1544页

作者： Ruijuan li Xue Men Rumei li Tongjin liu Hui lia.g Feng Fang Dongxiao Sun-Waterhouse Yongli Wang Institute of Plant Protection Shandong Academy of Agricultural SciencesJinan 250100China College of Food Science and Engineering Shandong Agricultural UniversityTaian 271018China School of Chemical Sciences The University of AucklandPrivate Bag 92019Auckland 1142New Zealand

In this study, the dissipation, terminal residues and dietary risk of the cyazofamid residue in three globally consumed minor crops, turnip(Brassica rapa L.), onion(Allium cepa L.)and romaine lettuce(Lactuca sativa L.)were assessed by supervised field trials at 6 locations of China in 2020. A reliable QuEChERS-LC-MS/MS method was developed for simultaneous analysis of cyazofamid and its primary metabolite, 4-chloro-5-p-tolylimidazole-2-carbonitrile(CCIM). The average recoveries of cyazofamid and CCIM in turnip, onion and romaine lettuce were 79%–97% and 77%–99%, respectively. The half-lives of cyazofamid in these crops were 5.7–6.5, 5.3–8.7 and 5.8–6.5 days in turnip, onion and romaine lettuce, respectively, with the final cyazofamid residues at harvest all lower than limit of quantitation(LOQ, 0.01 mg/kg). The turnip roots, onion bulbs and romaine lettuce leaves grown in China under good Agricultural Practices conditions and harvested 10, 14 and 5 days, respectively, after the cyazofamid SC(100 g/L)application, would be reasonably safe for consumption by the general population. The maximum residue limit(MRL)values of cyazofamid could be tentatively set as 10 mg/kg for turnip leaves, 0.3 mg/kg for turnip roots, 0.05 mg/kg for onion bulbs, and 10 mg/kg for romaine lettuce leaves.

关键词： Cyazofamid residue Minor crops Maximum residue limit Dissipation Dietary risk assessment

复方倍他米松应用于人工全膝关节置换术中局部浸润麻醉的早期疗效评估

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中国修复重建外科杂志 2024年第1期38卷 9-14页

作者：郑宇航李杨田华北京大学第三医院骨科北京100191 骨与关节精准医学教育部工程研究中心北京100191

目的评估人工全膝关节置换术(total knee arthroplasty,TKA)中局部浸润麻醉(local infiltration analgesia,lia)制剂添加复方倍他米松的早期疗效。方法回顾分析2022年5月—2023年3月采用TKA治疗的符合选择标准的102例膝关节骨关节炎患... 详细信息

目的评估人工全膝关节置换术(total knee arthroplasty,TKA)中局部浸润麻醉(local infiltration analgesia,lia)制剂添加复方倍他米松的早期疗效。方法回顾分析2022年5月—2023年3月采用TKA治疗的符合选择标准的102例膝关节骨关节炎患者临床资料。根据lia制剂是否添加复方倍他米松,患者分为对照组和研究组,每组51例。两组患者年龄、性别、身体质量指数、手术侧别、术侧术前关节活动度(range of motion,ROM)、膝关节学会评分系统(KSS)评分、白细胞计数(white blood cell,WBC)、红细胞压积等基线资料比较,差异均无统计学意义(P>0.05)。记录术中总失血量和隐性失血量,术后1、2、3 d WBC;以及术后1、2、3 d疼痛视觉模拟评分(VAS)及术后48 h内摄入吗啡毫克当量评估疼痛程度;术后第3天测量患者膝关节被动ROM及最大伸直和屈曲角度;记录术后早期并发症发生情况。结果两组患者总失血量和隐性失血量比较差异无统计学意义(P>0.05)。两组术后疼痛程度均较轻,术后前3 d两组VAS评分及术后48 h内摄入吗啡毫克当量比较差异均无统计学意义(P>0.05)。术后前3 d两组WBC均较术前显著改善(P0.05)。术后3 d研究组膝关节最大伸直角度小于对照组,膝关节最大屈曲角度及被动ROM均大于对照组,差异均有统计学意义(P0.05)。结论复方倍他米松应用于TKA术中lia是促进患者术后早期康复的安全优化策略。

关键词：人工全膝关节置换术局部浸润麻醉复方倍他米松关节活动度

Experimental and DFT studies of flower-like Ni-doped Mo_(2)C on carbon fiber paper:A highly efficient and robust HER electrocatalyst modulated by Ni(NO_(3))_(2)concentration

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Journal of Advanced Ceramics 2022年第8期11卷 1294-1306页

作者： Lei ZHANg Zhihui HU Juntong HUANg Zhi CHEN Xibao lia Zhijun FENg Huiyong YANg Saifang HUANg Ruiying LUO School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Research Institute for Frontier Science Beihang UniversityBeijing 100191China

Developing highly efficient and stable non-precious metal catalysts for water splitting is urgently *** this work,we report a facile one-step molten salt method for the preparation of self-supporting Ni-doped Mo_(2)C on carbon fiber paper(Ni–Mo_(2)CCB/CFP)for hydrogen evolution reaction(HER).The effects of nickel nitrate concentration on the phase composition,morphology,and electrocatalytic HER performance of Ni-doped Mo_(2)C@CFP electrocatalysts was *** the continuous increase of Ni(NO_(3))_(2)concentration,the morphology of Mo_(2)C gradually changes from granular to flower-like,providing larger specific surface area and more active *** nickel(Ni)into the crystal lattice of Mo_(2)C largely reduces the impedance of the electrocatalysts and enhances their electrocatalytic *** as-developed Mo_(2)C–3 M Ni(NO_(3))_(2)/CFP electrocatalyst exhibits high catalytic activity with a small overpotential of 56 mV at a current density of 10 mA·cm^(-2).This catalyst has a fast HER kinetics,as demonstrated by a very small Tafel slope of 27.4 mV·dec^(-1),and persistent long-term stability.A further higher Ni concentration had an adverse effect on the electrocatalytic *** functional theory(DFT)calculations further verified the experimental *** doping could reduce the binding energy of Mo–H,facilitating the desorption of the adsorbed hydrogen(Hads)on the surface,thereby improving the intrinsic catalytic activity of Ni-doped Mo_(2)C-based ***,excessive Ni doping would inhibit the catalytic activity of the *** work not only provides a simple strategy for the facile preparation of non-precious metal electrocatalysts with high catalytic activity,but also unveils the influence mechanism of the Ni doping concentration on the HER performance of the electrocatalysts from the theoretical perspective.

关键词： Mo_(2)C@CFP electrocatalyst nickel(Ni)doping hydrogen evolution reaction(HER) water splitting molten salt method