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cobalt coordination with pyridines in sulfurized polyacrylonitrile cathodes to form conductive pathways and catalytic M-N4S sites for accelerated Li-S kinetics

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Journal of Energy chemistry 2021年第10期30卷 170-178,I0005页

作者： Amir Abdul Razzaq Ganwen chen Xiaohui Zhao Xietao yuan Jiapeng Hu Ziwei Li Yufeng chen Jiabin Xu Rahim Shah Jun Zhong Yang Peng Zhao Deng Soochow Institute for Energy and Materials Innovations College of EnergySoochow UniversitySuzhou 215006JiangsuChina key Laboratory of Advanced carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhou 215006JiangsuChina Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123JiangsuChina School of Physics University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina

Sulfurized polyacrylonitrile(SPAN)represents a unique class of cathode material for lithium sulfur(Li-S)batteries as it eradicates the polysulfides shuttling issue in carbonate-based ***,due to the essential chemical S-linking and organic nature of SPAN,the active mass percentage and rate capability are two bottleneck issues preventing its ultimate deployment outside of *** the current work,aiming to endow both the charge conductivity and catalytic activity to SPAN for maximizing the redox kinetics of S conversion,a freestanding nanofibrous SPAN cathode embedding conductive cNTs and atomically dispersed co centers is fabricated via multivariate *** the cNTs enable dramatically enhancing the fiber conductivity and generating mesoscopic porosity for facilitating charge and mass transportation,the cross-linking of SPAN by co-N_(4) S motifs creates extra charge conduction pathways and further serves as the catalytic active sites for expediting redox S *** a result,an extraordinary Li-SPAN performance is achieved with a high specific capacity up to 1856 mAh g^(-1)@0.2 c,a superb rate capability up to 10 c,and an ultra-long battery life up to 1500 cycles@1 ***,our study here provides insights into the adoption of coordination chemistry to maximize the sulfur utilization by ensuring a more complete redox conversion from SPAN to Li2 S,and vice versa.

关键词： Sulfurized polyacrylonitrile Electrospinning cobalt coordination chemistry Lithium sulfur batteries

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Stability of potentially toxic elements in municipal sludge biochars modified by Mgcl2 and phosphate

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Waste Disposal and Sustainable Energy 2023年第1期5卷 13-23页

作者： Qiqi Huang Siqi chen Jinhao Lin Jingzi Beiyuan Jin Wang Juan Liu Yundang Wu Xiaolian Wu Fuhua Li Wenbing yuan chengrong Nie School of Environmental and chemical Engineering Foshan UniversityFoshan528000China School of Food Science and Technology Foshan UniversityFoshan528000China Foshan Engineering and Technology Research center for contaminated Soil Remediation School of Environmental and Chemical EngineeringFoshan UniversityFoshan528000China School of Environmental Science and Engineering Key Laboratory of Water Quality and Conservation in the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou510006China Guangdong key Laboratory of Integrated Agro-Environmental Pollution control and Management Institute of Eco-Environmental and Soil SciencesGuangdong Academy of SciencesNational-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South ChinaGuangzhou510650China

Municipal wastewater sludge can be pyrolyzed as biochars to better use nutrients and stabilize carbon compared with other typical technologies,such as landfill and ***,sludge-derived biochars might contain large amounts of potentially toxic elements(PTEs),such as Zn,cu,cr,Ni,Pb,and *** stability of PTEs in biochars might be improved by higher pyrolytic temperatures,which can be further improved by different ***,PO4-modification at 300°c and cl-modification at 700°c were carried out,respectively,to enhance the stability of *** leaching tests have been performed to assess the stability of PTEs in biochars,including the synthetic precipitation leaching procedure(SPLP),toxicity characteristic leaching procedure(TcLP),diethylenetriamine pentaacetate(DTPA)extraction,and in vitro simple bioaccessibility extraction test(SBET).The morphological structure,elemental mapping,and mineral formation of the pristine and modified biochars were studied by scanning electron microscopy–energy-dispersive X-ray spectroscopy(SEM–EDS)and X-ray diffraction(XRD).Our results suggested that the leachability,mobility,plant-availability,and bioaccessibility of most PTEs were decreased by pyrolysis,yet the total contents of PTEs were elevated,especially at 700°***,modification by phosphates and Mgcl2 enhanced the stability of PTEs in ***,it should be noted that higher bioaccessibility of PTEs was observed in biochars of P-modification than cl-modification,which is associated with the dissolution of phosphate precipitates under acidic conditions(pHcl-modification leads to higher plant-available Zn and cu and bioaccessible Zn compared with the unmodified biochar produced at 700°c.

关键词： Biochar modification Sludge biochar Sewage sludge utilization chlorination Pyrolysis Heavy metals

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Feasibility of Transabdominal Real-time cDFI and HDFI Techniques for Fetal Pulmonary Vein Display in the First Trimester

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current Medical Science 2022年第3期42卷 635-641页

作者： Dong-mei LIN Yun-xiao ZHU Ying TAN Yu-jun HUANG kun yuan Wen-fen LIU Zuo-feng XU Department of Medical Ultrasonics the Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen 518107China Department of Medical Ultrasonics South China Hospital of Shenzhen UniversityShenzhen 518000China

Objective This study aimed to assess the feasibility and usefulness of transabdominal color Doppler flow imaging(cDFI)technology and the high-definition flow imaging(HDFI)technique in detecting fetal pulmonary veins(PVs)in the first trimester(11–13^(+6)weeks).Methods From December 2018 to October 2019,328 pregnant women with 328 normal singleton fetuses(crown-rump length:45–84 mm)who had undergone cDFI and HDFI scans for fetal heart and vessel examination were enrolled in this *** cases were divided into three groups according to the gestational age:group A,11^(+0)−11^(+6)weeks;group B,12^(+0)−12^(+6)weeks;and group c,13^(+0)−13^(+6)*** sonograms and cDFI and HDFI images were analyzed by two senior radiologists independently and *** abilities of cDFI and HDFI to display PVs were *** Successful PV display rates via cDFI and HDFI were 2.3%and 68.2%(Pc,*** total successful display rates for the two methods were 28.9%(cDFI)and 84.8%(HDFI)(Pconclusions The HDFI technique is more valuable than cDFI for detecting PVs in early pregnancy(11–13^(+6)weeks).HDFI can detect at least one PV in all cases and may be used to detect pulmonary venous anomalies early.

关键词： pulmonary vein first trimester prenatal sonography high-definition flow imaging color Doppler flow imaging

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The effect of catalyst layer design on catalyst utilization in PEMFc studied via stochastic reconstruction method

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Energy and AI 2023年第3期13卷 64-75页

作者： congfan Zhao Shu yuan Xiaojing cheng Zhifeng Zheng Jia Liu Jiewei Yin Shuiyun Shen Xiaohui Yan Junliang Zhang Institute of Fuel cells School of Mechanical EngineeringShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240PR China MOE key Laboratory of Power Machinery and Engineering Shanghai Jiao Tong University800 Dongchuan RoadShanghaiPR China Shanghai Hydrogen Propulsion Technology co. Ltd1788 Xiechun RdShanghai 201804PR China

catalyst utilization is an important determinant of proton exchange membrane fuel cell performance,and increasing the catalyst utilization is one of the most critical approaches to reducing the catalyst loading in PEMFc.4-phase stochastic reconstruction method based on the variable-resolution Quartet Structure Generation Set(QSGS)algorithm is utilized to elucidate the influence of different parameters of electrode preparation,including the porosity,the dispersion degree of carbon agglomerate,ionomer content,and carbon support size,on the catalyst utilization in the catalyst *** was found that there exist optimal values for the porosity,dispersion degree of carbon agglomerate,ionomer content,and carbon support sizes in cLs and any deviations from these optimal values would lead to transport issues of electron,proton and mass within *** electron,proton and mass transport into consideration simultaneously,the optimal Pt utilization is 46.55%among 48 cases in this investigation,taken at the carbon support diameter of 40 nm,the porosity of 0.4,the agglomerate spatial density of 25μm^(−3) and I/c at *** selection of porosity,ultrasonic dispersion technique and ionomer content for conventional electrode preparation requires compromises on mass,electron and proton transport,leading to catalyst utilization in cLs hardly exceeding 50%.Therefore,the next generation of catalyst layer design and preparation technology is desired.

关键词： PEMFc catalyst layer Pt utilization Reconstruction method Triple phase boundary

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红松种子休眠状态的变化调控种子萌发的季节性时间

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Journal of Plant Ecology 2023年第2期16卷 102-113页

作者： yuan Song Mingyi Zhang Yun Guo Xiaoye Gao college of Eco-Environmental Engineering Guizhou Minzu UniversityGuiyang 550025China The karst Environmental Geological Hazard Prevention Laboratory of Guizhou Minzu University Guiyang 550025China

种子休眠能够确保幼苗在一个季节性变化的环境中选择适宜的季节建植。红松(Pinus koraiensis)种子在秋季落下之后具有形态生理休眠。一小部分种子在落下之后的第一个春季萌发,但大部分种子在第二个春季萌发,目前尚不清楚休眠状态如何驱... 详细信息

种子休眠能够确保幼苗在一个季节性变化的环境中选择适宜的季节建植。红松(Pinus koraiensis)种子在秋季落下之后具有形态生理休眠。一小部分种子在落下之后的第一个春季萌发,但大部分种子在第二个春季萌发,目前尚不清楚休眠状态如何驱动这种萌发特性。在2018年10月中旬,在中国东北黑龙江省丰林国家级自然保护区的凋落物和土层之间埋藏新鲜的红松种子,并且隔一段时间取出,测定种子的野外萌发率、种胚生长情况、种子活力和室内萌发率。形态生理休眠的生理休眠部分在第一个冬季逐渐解除,但在第一个夏季被再次诱导;再次被诱导的生理休眠在第二个秋、冬季解除。形态生理休眠的形态休眠部分在第一个夏季逐渐缓慢解除,但在第二个早、中秋季迅速解除。在第二个春季,红松种子完全解除形态生理休眠。种子的生理休眠解除,但形态休眠仍然存在,导致其在第一个春季的野外萌发率非常低。种子的形态和生理休眠均解除,导致大部分种子能在第二个春季相对较低的温度(昼夜温度在10/5°c以上)下萌发。红松种子为形态生理休眠种子的休眠状态变化研究提供了示例。

关键词：红松(Pinus koraiensis) 原生休眠形态生理休眠种胚生长种子萌发时间

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Effect of hot deformation on α→β phase transformation in 47Zr-45Ti-5Al-3V alloy

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Transactions of Nonferrous Metals Society of china 2018年第10期28卷 1947-1957页

作者： yuan-biao TAN Li-yuan Ji Wen-chang LIU Song XIANG Fei ZHAO Yi-long LIANG Guizhou key Laboratory of Materials Structure and Strength College of Materials and MetallurgyGuizhou UniversityGuiyang 550025China State key Laboratory of Metastable Materials Science and Technology College of Materials Science and EngineeringYanshan UniversityQinhuangdao 066004China

The effect of strain rate and deformation temperature on theα→βphase transformation in 47Zr-45Ti-5Al-3V alloy with an initial widmanstattenαstructure was *** the deformation temperature of 550°c,the volume fraction ofαphase decreased with increasing strain *** 600 and 650°c,the volume fraction ofαphase firstly increased to a maximum value with increasing strain rate from 1×10-3 to 1×10-2 s-1,and then *** 700°c,the microstructure consisted of singleβ*** a given strain rate,the volume fraction ofαphase decreased with increasing deformation *** decreasing strain rate and increasing deformation temperature,the volume fraction and size of globularαphase *** 650°c and 1×10-3 s-1,the lamellarαphase was fully *** variation in the volume fraction and morphology ofαphase with strain rate and deformation temperature significantly affected the hardness of 47Zr-45Ti-5Al-3V alloy.

关键词： 47Zr-45Ti-5Al-3V alloy hot deformation phase transformation Vickers hardness microstructure

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Organic single-crystal light-emitting transistors with external quantum efficiency over 20%

聚集体(英文)

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聚集体(英文) 2023年第4期4卷 122-127页

作者： Jian Deng Zejian Zhang Pengpeng Sang Shujun Yin Shitong Zhang yuan Li Bing Yang cheng Gu Yuguang Ma State key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhouP.R.China School of Information Science and Engineering Shandong UniversityQingdaoP.R.China State key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchunP.R.China Guangdong Provincial key Laboratory of Luminescence from Molecular Aggregates South China University of TechnologyGuangzhouP.R.China

Organic light-emitting transistors(OLETs)have attracted increasing attention because of their potential applications in next-generation displays and high-energy operating ***,the simultaneous achievement of high luminescent efficiency and carrier mobility in organic semiconductors remains challenging because the localized excitons are advantageous for light emission,whereas the delocalized carriers are beneficial for efficient charge ***,we report an organic single crystal of a cyano-substituted styrene derivative with balanced mobility yielding a record-high external quantum efficiency of 20.5%in ***-dependent I–V curves and electronic structure analyses based on firstprinciples calculations were performed to disclose the underlying mechanism as a band transport,which provides an efficient way to achieve high quantum efficiency in OLETs.

关键词： organic electronics organic light-emitting transistors single crystals styrene

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Redesigning transcription factor cre1 for alleviating carbon catabolite repression in Trichoderma reesei

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Synthetic and Systems Biotechnology 2020年第3期5卷 230-235页

作者： Lijuan Han kuimei Liu Wei Ma Yi Jiang Shaoli Hou Yinshuang Tan Quanquan yuan kangle Niu Xu Fang State key Laboratory of Microbial Technology Shandong UniversityQingdao266237China Rongcheng campus Harbin University of Science and TechnologyWeihai264300China Shandong Henglu Biological Technology co. LtdJinan250000China

carbon catabolite repression(ccR),which is mainly mediated by cre1 and triggered by glucose,leads to a decrease in cellulase production in Trichoderma *** studies have focused on modifying cre1 for alleviating *** on the homologous alignment of creA from wild-type Penicillium oxalicum 114–2(Po-0)and cellulase hyperproducer JUA10-1(Po-1),we constructed a c-terminus substitution strain—Po-2—with decreased transcriptional levels of cellulase and enhanced *** revealed that the c-terminal domain of creAPo−1 plays an important role in alleviating ***,we replaced the c-terminus of cre1 with that of creAPo−1 in ***(Tr-0)and generated *** a control,the c-terminus of cre1 was truncated and Tr-2 was *** transcriptional profiles of these transformants revealed that the c-terminal chimera greatly improves cellulase transcription in the presence of glucose and thus upregulates cellulase in the presence of glucose and weakens ccR,consistent with truncating the c-terminus of cre1 in ***,we propose constructing a c-terminal chimera as a new strategy to improve cellulase production and alleviate ccR in the presence of glucose.

关键词： carbon catabolite repression chimera cre1 cel7a Trichoderma reesei

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Increased mitochondrial fission drives the reprogramming of fatty acid metabolism in hepatocellular carcinoma cells through suppression of Sirtuin 1

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cancer communications 2022年第1期42卷 37-55页

作者： Dan Wu Yi Yang Yiran Hou Zifeng Zhao Ning Liang Peng yuan Tao Yang Jinliang Xing Jibin Li Department of Physiology and Pathophysiology State Key Laboratory of Cancer BiologyFourth Military Medical UniversityXi’anShaanxi 710032P.R.China Department of Pain Treatment Tangdu HospitalFourth Military Medical UniversityXi’anShaanxi 710032P.R.China Department of General Surgery Tangdu HospitalFourth Military Medical UniversityXi’anShaanxi 710038P.R.China Experimental Teaching center of Basic Medicine Fourth Military Medical UniversityXi’anShaanxi 710038P.R.China

Background:Mitochondria are dynamic organelles that constantly change their morphology through fission and fusion ***,abnormally increased mitochondrial fission has been observed in several types of ***,the functional roles of increased mitochondrial fission in lipid metabolism reprogramming in cancer cells remain *** study aimed to explore the role of increased mitochondrial fission in lipid metabolism in hepa-tocellular carcinoma(Hcc)***:Lipid metabolism was determined by evaluating the changes in the expressions of core lipid metabolic enzymes and intracellular lipid *** rate of fatty acid oxidation was evaluated by[PH]-labelled oleic *** mito-chondrial morphology in Hcc cells was evaluated by fluorescent *** expression of protein was determined by real-time PcR,imnmunohistochemistry and Western ***:Activation of mitochondrial fission significantly promoted de novo fatty acid synthesis in Hcc cells through upregulating the expression of lipogenic genes fatty acid synthase(FASN),acetyl-coA carboxylasel(AccI),and elonga-tion of very long chain fatty acid protein 6(ELOVL6),while suppressed fatty acid oxidation by downregulating carnitine palmitoyl transferase 1A(cPTIA)and acyl-coA oxidase 1(AcOX1).consistently,suppressed mitochondrial fission exhibited the opposite ***,in vitro and in vivo studies revealed that mitochondrial fission-induced lipid metabolism reprogramming significantly promoted the proliferation and metastasis of Hcc ***,mito-chondrial fission increased the acetylation level of sterol regulatory element-binding protein 1(SREBPI)and peroxisome proliferator-activated receptor coac-tivator 1 alpha(PGc-1a)by suppressing nicotinamide adenine dinucleotide(NAD+)/Sirtuin 1(SIRTI)*** elevated SREBP1 then upregulated the expression of FASN,Acc1 and ELOVL6 in Hcc cells,while PGc-1c/PPARa sup-pressed the expression of cPTIA and AcOXL conclusi

关键词： hepatocellular carcinoma lipogenesis fatty acid oxidation metabolic reprogramming mito-chondrial fission Sirtuin 1

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Laodelphax striatellus Atg8 facilitates Rice stripe virus infection in an autophagy-independent manner

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Insect Science 2021年第2期28卷 315-329页

作者： yuan-Ling Yu Meng-Ting Zhang Yan Huo Ji-Liang Tang Qing Liu Xiao-Ying chen Rong-Xiang Fang Li-Li Zhang State key Laboratory of Plant Genomics Institute of MicrobiologyChinese Academy of ScienceBeijingChina cAS center for Excellence in Biotic Interactions University of the Chinese Academy of SciencesBeijingChina State key Laboratory for conservation and Utilization of Subtropical Agro-bioresources Guangxi UniversityNanningChina National Plant Gene Research center BeijingChina

Rice stripe virus(RSV)is the causative agent of rice stripe disease and is completely dependent on insect vectors for its plant-to-plant *** striatellus is the major insect vector for *** this study,we explored the interactions be-tween RSV infection and *** autophagy,a potential intrinsic antiviral mechanism in *** found that *** autophagic activity did not affect RSV infection;however,the autophagy related-8(Atg8)gene significantly enhanced virus ***-ing RSV initial infection within the *** midgut,silencing of Atg8 expression significantly decreased the phosphorylation of c-Jun N-terminal kinase(p-JNk);however,when RSV infection is absent,silencing of Atg8 did not alter p-JNk *** results indicated that Atg8 might activate the JNk machinery by allowing more virus infection into *** further revealed that Atg8-deficiency significantly decreased RSV accumu-lation on the surface of the insect midgut epithelial cells,suggesting a receptor trafficking function of the y-aminobutyric acid receptor-associated protein *** the RSV ovary entry as a model,in which vitellogenin receptor(V gR)mediates RSV cell entry,we clarified that Atg8-deficiency decreased the abundance of V gR localizing on the cytomem-brane and disturbed the attachment of RSV in the germarium ***,these results revealed an autophagy-independent function of *** Atg8 that enhances RSV initial infection by increasing virus attachment on the infection sites.

关键词： Atg8 insect autophagy Laodelphax striatellus receptor trafficking Rice stripe virus viral initial infection

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