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Carbon-doped surface unsaturated sulfur enriched CoS2@rGO aerogel pseudocapacitive anode and biomass-derived porous carbon cathode for advanced lithium-ion capacitors

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1500-1513页

作者： Yunpeng shang Xiaohong Sun Zhe chen Kunzhou Xiong Yunmei Zhou Shu Cai Chunming Zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow Fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin300387China

As a hybrid energy storage device of lithium-ion batteries and supercapacitors,lithium-ion capacitors have the potential to meet the demanding needs of energy storage equipment with both high power and energy *** this work,to solve the obstacle to the application of lithium-ion capacitors,that is,the balancing problem of the electrodes kinetic and capacity,two electrodes are designed and adequately *** the anode,we introduced in situ carbon-doped and surface-enriched unsaturated sulfur into the graphene conductive network to prepare transition metal sulfides,which enhances the performance with a faster lithium-ion diffusion and dominant pseudocapacitive energy ***,the lithium-ion capacitors anode material delivers a remarkable capacity of 810 mAh·g^(−1) after 500 cycles at 1 A·g^(−1).On the other hand,the biomass-derived porous carbon as the cathode also displays a superior capacity of 114.2 mAh·g^(−1) at 0.1 A·g^(−1).Benefitting from the appropriate balance of kinetic and capacity between two electrodes,the lithium-ion capacitors exhibits superior electrochemical *** assembled lithium-ion capacitors demonstrate a high energy density of 132.9 Wh·kg^(−1) at the power density of 265 W·kg^(−1),and 50.0 Wh·kg^(−1) even at 26.5 kW·kg^(−1).After 10000 cycles at 1 A·g^(−1),lithium-ion capacitors still demonstrate the high energy density retention of 81.5%.

关键词： in-situ carbon-doped surface unsaturated sulfur enriched pseudocapacitive energy storage biomass-derived carbon lithium-ion capacitors

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Double-sided surface functionalization: An effective approach to stabilize and modulate the electronic structure of graphene-like borophene

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InfoMat 2021年第3期3卷 327-336页

作者： Xiao Tang Jinxing Gu Jing shang Zhongfang chen Liangzhi Kou School of Mechanical Medical and Process EngineeringQueensland University of TechnologyBrisbaneQueenslandAustralia Department of Chemistry University of Puerto RicoRio Piedras CampusSan JuanPuerto Rico

Graphene-like borophene was theoretically proposed and recently synthesized on Al(111)surface,however,how to conquer its structural instability is still an open *** means of density functional theory computations,we theoretically predicted that honeycomb borophene can be well stabilized by double-sided surface passivation with monovalent functional groups(X=F,Cl,Br,I,OH,and NH2)due to the electron *** system undergoes the transition from metallic to semiconducting upon functionalization,while the energy gap depends on the choice of functional *** external strain,the gap values can be manipulated over a broad *** further calculations indicated that the functionalized borophene possesses moderate and anisotropic carrier mobility,which is comparable to or even higher than some 2D materials such as MoS2 and *** work provides a feasible strategy to effectively stabilize the graphene-like borophene and tune the electronic properties with great potentials for electronic applications.

关键词： density functional theory calculations graphene-like borophene surface functionalization twodimensional materials

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FTA-环介导等温扩增技术直接提取变异链球菌DNA的效果评价

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中国组织工程研究 2025年第5期29卷 1043-1049页

作者：王玥晖尚进杨晨符冬格曹灿张晓东王敬夫北部战区总医院口腔科辽宁省沈阳市110016 空军军医大学第三附属医院颌面外科陕西省西安市710004

背景:变异链球菌是龋病的重要病原菌,及时检测变异链球菌水平对龋病的早发现、早治疗有重要意义。目的:建立并评价FTA-环介导等温扩增(loop-mediated isothermal amplification,LAMP)技术直接提取变异链球菌DNA的应用效果。方法:①制备... 详细信息

背景:变异链球菌是龋病的重要病原菌,及时检测变异链球菌水平对龋病的早发现、早治疗有重要意义。目的:建立并评价FTA-环介导等温扩增(loop-mediated isothermal amplification,LAMP)技术直接提取变异链球菌DNA的应用效果。方法:①制备含有ATCC标准菌株变异链球菌的菌悬液,接种于脑心浸出液培养基,充分混匀后按10倍梯度稀释成7种浓度(4.2×10^(7),4.2×10^(6),4.2×10^(5),4.2×10^(4),4.2×10^(3),4.2×10^(2),4.2×10 CFU/mL),每个稀释级做2个平行对照,并增加无菌水作为空白对照;②分别采用FTA卡、常规煮沸法、试剂盒提取及裂解液提取4种方法直接提取菌株DNA,通过LAMP技术进行扩增,并进行特异性试验,比较4种提取方法的差异。结果与结论:①4种方法提取的DNA均满足LAMP扩增的要求;②特异性试验结果显示,只有变异链球菌才可特异扩增出靶基因;③裂解液提取法最低检测限为4.2×10^(3) CFU/mL,FTA卡提取法最低检测限为4.2×10^(4) CFU/mL,试剂盒提取法和常规煮沸法最低检测限分别为4.2×10^(6) CFU/mL和4.2×10^(7) CFU/mL;④4种提取方法其他方面的比较显示,试剂盒提取法的实验成本、步骤数和时间都是最高;其他3种方法步骤数一致,其中FTA卡所需仪器设备最少,常规煮沸法单次成本最低,裂解液提取法所需时间最少;FTA卡和裂解液提取法仅需少量菌即可提取成功,后者在时间方面优于FTA卡,但相较于FTA卡其单次成本高,所需设备多;⑤结果说明,该研究建立的FTA-LAMP技术具有操作简便、特异性强、灵敏度高、结果可视化等优势,有望为高效提取检测变异链球菌提供新途径。

关键词：变异链球菌环介导等温扩增 FTA卡 DNA 可视化

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Structural Evolution of Chepaizi Uplift and its Control on Stratigraphic Deposition in the Western Junggar Basin, China

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1060-1075页

作者： NI Minjie chen Shi LIU Zichao shang Fengkai QI Jiafu WANG Lishuang State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China College of Geosciences China University of PetroleumBeijing 102249China Exploration and Development Research Institute Shengli Oilfield CompanySINOPECDongying 257015ShandongChina

Geological mapping,interpreted cross sections,structural analyses and residual thickness maps were used to characterize the evolution of stress setting,structure and stratigraphic distribution of the Chepaizi Uplift,which is a NW-SE trending structure located in the Western Junggar *** NS-trending faults show an important transpressional phase during the Late Permian,as demonstrated by tectonic stress field and stratigraphic thickness variations.A major compressional thrusting and strike-slip phase during the Late Jurassic created a series of NW-SE faults that originated by the large-scale uplift event in the Northern *** were reactivated as thrust and dextral strike-slip *** addition,the angular unconformity observed between Jurassic and Cretaceous provide evidence of this tectonic *** of normal faults indicate that the area records southward tilting and regional derived extensional stress that took place during the *** that,thick Early Cenozoic strata are widely *** balanced cross-section highlights the evolution of stress setting and stratigraphic distribution of the Chepaizi Uplift.

关键词： structural evolution seismic section Junggar Basin Chepaizi Uplift Northern Tianshan

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High-resolution data acquisition technique in broadband seismic observation systems

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Science China(Technological Sciences) 2016年第6期59卷 961-972页

作者： GAO shang Hua XUE Bing LI Jiang LIN Zhan chen Yang ZHU Xiao Yi Key Laboratory of Earthquake Prediction Institute of Earthquake ScienceChina Earthquake Administration

The dynamic range of the currently most widely used 24-bit seismic data acquisition devices is 10–20 d B lower than that of broadband seismometers, and this can affect the completeness of seismic waveform recordings under certain conditions. However, this problem is not easy to solve because of the lack of analog to digital converter(ADC) chips with more than 24 bits in the market. In this paper, we propose a method in which an adder, an integrator, a digital to analog converter chip, a field-programmable gate array, and an existing low-resolution ADC chip are used to build a third-order 16-bit oversampling delta-sigma modulator. This modulator is equipped with a digital decimation filter, thus facilitating higher resolution and larger dynamic range seismic data acquisition. Experimental results show that, within the 0.1–40 Hz frequency range, the circuit board's dynamic range reaches 158.2 d B, its resolution reaches 25.99 bits, and its linearity error is below 2.5 ppm, which is better than what is achieved by the commercial 24-bit ADC chips ADS1281 and CS5371. This demonstrates that the proposed method may alleviate or even completely resolve the amplitude-limitation problem that so commonly occurs with broadband observation instruments during strong earthquakes.

关键词： seismic data acquisition analog to digital conversion (ADC) high resolution dynamic range delta-sigma modulation

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A bioactive composite hydrogel dressing that promotes healing of both acute and chronic diabetic skin wounds

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Bioactive Materials 2024年第4期34卷 298-310页

作者： Shunlai shang Kaiting Zhuang Jianwen chen Ming Zhang Shimin Jiang Wenge Li Department of Nephrology China-Japan Friendship HospitalBeijingChina Department of Nephrology First Medical Center of Chinese PLA General HospitalNephrology Institute of the Chinese People’s Liberation ArmyNational Key Laboratory of Kidney DiseasesNational Clinical Research Center for Kidney DiseasesBeijing Key Laboratory of Kidney Disease ResearchBeijing100853China Department of Nephrology Affiliated Beijing Chaoyang Hospital of Capital Medical UniversityBeijing100020China

Mesenchymal stem cell derived exosomes(MSC-Exos)demonstrate beneficial effects on wound healing via anti-inflammatory and angiogenic ***(CS)exhibits excellent biocompatibility and accelerates cellular migration,adhesion,and *** ions released from bioactive glass(BG)and titanium dioxide(TiO_(2))nanoparticles exhibit sustained angiogenic and antibacterial *** this study,CMCS-CEBT hydrogel was synthesized from exosomes encapsulated carboxymethyl chitosan(CMCS),chitosan nanoparticles(CS-NPs),BG,and TiO_(2)nanoparticles for a preliminary evaluation of its impacts on the treatment of full-thickness skin defects,diabetic wounds,and burn skin injury due to *** vitro analysis indicated that the hydrogel exhibits excellent cell compatibility,stimulates endothelial cell adhesion and proliferation,and presents anti-inflammatory,angiogenic,and antibacterial *** vivo,the composite hydrogel dressing accelerated a wound healing acceleration effect,stimulated angiogenesis,and increased collagen deposition and the expression of anti-inflammatory *** innovative composite hydrogel dressing as a potential clinical therapy,utilizing bioactive materials,holds promise as a potential clinical therapy that aims to facilitate the regeneration of acute and chronically damaged skin tissue.

关键词： Exosomes Bioactive glass Diabetic wound Anti-inflammatory Titanium dioxide

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MiR-494-3p regulates cell proliferation and apoptosis via KLF7 in Schwann cells

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BIOCELL 2021年第1期45卷 57-64页

作者： YANGUO PENG WEI LI SHUIYU chen WANGCHUN WU ZHANFANG shang Department of Neurosurgery The Affiliated Mindong Hospital of Fujian Medical UniversityFuan355000China Department of Neurosurgery Hangzhou Hospital of Traditional Chinese MedcineHangzhou310007China

Peripheral nerve injury is a common neurodegenerative disease,which causes disability and a huge economic burden for ***(miRNAs)have been acknowledged as major regulators and therapeutic targets of neurological ***,the functional studies of miRNAs in neurological disease will contribute to discover new therapeutic targets for peripheral nerve *** Dawley rats treated sciatic nerve surgical injury were regarded as peripheral nerve injury model in *** expression of miR-494-3p and Kruppel like factor7(KLF7)were measured by Real-time quantitative polymerase chain reaction(RT-qPCR)*** addition,western blot analysis was conducted to measure the protein levels of KLF7,Bax,Bcl-2,and C-caspase *** viability and apoptosis were detected in Schwann cells by EdU stain and flow cytometry,*** interaction between miR-494-3p and KLF7 was investigated by dual-luciferase reporter *** expression of miR-494-3p was reduced at the beginning,but KLF7 was enhanced in Sprague Dawley rats with peripheral nerve *** of miR-494-3p promoted cell proliferation and suppressed apoptosis,while overexpression of miR-494-3p or silencing KLF7 led to opposite ***,the upregulation of KLF7 attenuated miR-494-3p overexpression-induced suppressive effects on viability and promotion of apoptosis in Schwann ***-494-3p negatively regulates KLF7 in Schwann cells to mediate proliferation and apoptosis.

关键词： Peripheral nerve injury miR-494-3p KLF7 Schwann cells

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A novel bioartificial pancreas fabricated via islets microencapsulation in anti-adhesive core-shell microgels and macroencapsulation in a hydrogel scaffold prevascularized in vivo

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Bioactive Materials 2023年第9期27卷 362-376页

作者： Haofei Li Yulian shang Qi Feng Yang Liu Junlin chen Hua Dong School of Materials Science and Engineering South China University of TechnologyGuangzhou510006China National Engineering Research Center for Tissue Restoration and Reconstruction(NERC-TRR) Guangzhou510006China Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education South China University of TechnologyGuangzhou510006China School of Biomedical Science and Engineering South China University of TechnologyGuangzhou510006China Guangdong Province Key Laboratory of Biomedical Engineering South China University of TechnologyGuangzhou510641China

Islets transplantation is a promising treatment for type 1 diabetes mellitus. However, severe host immune rejection and poor oxygen/nutrients supply due to the lack of surrounding capillary network often lead to transplantation failure. Herein, a novel bioartificial pancreas is constructed via islets microencapsulation in core-shell microgels and macroencapsulation in a hydrogel scaffold prevascularized in vivo. Specifically, a hydrogel scaffold containing methacrylated gelatin (GelMA), methacrylated heparin (HepMA) and vascular endothelial growth factor (VEGF) is fabricated, which can delivery VEGF in a sustained style and thus induce subcutaneous angiogenesis. In addition, islets-laden core-shell microgels using methacrylated hyaluronic acid (HAMA) as microgel core and poly(ethylene glycol) diacrylate (PEGDA)/carboxybetaine methacrylate (CBMA) as shell layer are prepared, which provide a favorable microenvironment for islets and simultaneously the inhibition of host immune rejection via anti-adhesion of proteins and immunocytes. As a result of the synergistic effect between anti-adhesive core-shell microgels and prevascularized hydrogel scaffold, the bioartificial pancreas can reverse the blood glucose levels of diabetic mice from hyperglycemia to normoglycemia for at least 90 days. We believe this bioartificial pancreas and relevant fabrication method provide a new strategy to treat type 1 diabetes, and also has broad potential applications in other cell therapies.

关键词： Type 1 diabetes Bioartificial pancreas Islet encapsulation Core-shell microgel Prevascularized scaffold

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Cytosolic Ca^(2+)as a multifunctional modulator is required for spermiogenesis in Ascaris suum

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Protein & Cell 2013年第6期4卷 456-466页

作者： Yunlong shang Lianwan chen Zhiyu Liu Xia Wang Xuan Ma Long Miao Laboratory of Noncoding RNA Institute of BiophysicsChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

The dynamic polar polymers actin fi laments and microtu-bules are usually employed to provide the structural ba-sis for establishing cell polarity in most eukaryotic *** round and immotile spermatids from nematodes contain almost no actin or tubulin,but still have the abil-ity to break symmetry to extend a pseudopod and initiate the acquisition of motility powered by the dynamics of cytoskeleton composed of major sperm protein(MSP)during spermiogenesis(sperm activation).However,the signal transduction mechanism of nematode sperm activation and motility acquisition remains poorly *** we show that Ca^(2+) oscillations induced by the Ca^(2+) release from intracellular Ca^(2+) store through inositol(1,4,5)-trisphosphate receptor are required for Ascaris suum sperm *** chelation of cytosolic Ca^(2+) suppresses the generation of a functional pseudopod,and this suppression can be relieved by introducing ex-ogenous Ca^(2+) into sperm ***^(2+) promotes MSP-based sperm motility by increasing mitochondrial membrane potential and thus the energy supply required for MSP cytoskeleton *** the other hand,Ca^(2+) promotes MSP disassembly by activating Ca^(2+)/calmodulin-depend-ent serine/threonine protein phosphatase *** addition,Ca^(2+)/camodulin activity is required for the fusion of sperm-specifi c membranous organelle with the plasma membrane,a regulated exocytosis required for sperm ***,Ca^(2+)plays multifunctional roles during sperm activation in Ascaris suum.

关键词： spermiogenesis Ca^(2+) major sperm protein Ascaris suum

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Life Prediction of Newly Developed Ferritic Stainless Steels for Automotive Muffler

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Journal of Iron and Steel Research International 2014年第1期21卷 125-130页

作者： Chao chen Yue ZHENG Yue ZHANG Xiao-hui LU cheng-jia shang Nuclear Equipment Division CNNC China Nuclear Power Engineering Co.Ltd. School of Materials Science and Engineering University of Science and Technology Beijing Nuclear and Radiation Safety Center MEP

Corrosion mechanism of automotive mufflers was investigated by SEM （scanning electron microscope） and XRD （X-ray diffractomer） analysis. 409L and newly developed 439M steels were evaluated in terms of condensate corrosion tests for 5 periods, 10 periods and 20 periods separately. The relative lifetimes of 409L and 439M steels were predicted according to the extreme value analysis method and pitting corrosion models. Modelling studies dem- onstrated that the predicted relative lifetime of 439M ferrite stainless steel is 6.8 times that of 409L steels. The extreme value analysis method was also successfully used in the road test. The estimated maximum corrosion depth of the 439M muffler is 0. 55 ram.

关键词： stainless steel SEMi XRD modelling study pitting corrosion

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