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Enhanced bifunctional oxygen electrochemical catalytic performance using La-doped CoFe_(2)O_(4)spinel supported by 3D-G for Zn-air batteries

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Journal of Energy Chemistry 2024年第7期94卷 778-788页

作者： Yinggang Sun tingwei zhang Peng Sun Jigang Wang Wenjie Duan Yanqiong Zhuang Likai Wang Zhongfang Li School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049ShandongChina

The preparation of bifunctional catalysts for oxygen reduction(ORR)and oxygen evolution(OER)is crucial for Zn-air ***,we report a La doped CoFe_(2)O_(4) spinel catalyst supported on threedimensional graphene(3D-G),where La can facilitate electron transfer from Co to Fe,leading to increased electron cloud density in Fe and improved catalytic *** redshift of the G peak in the Raman spectra indicates the interaction between theπbond of 3D-G and d orbitals in La_(0.2)CoFe_(1.8)O_(4).La_(0.2)CoFe_(1.8)/3D-G exhibits superior ORR performance(E_(1/2)=0.86 V ***)and OER performance(E_(j=10)=1.55 V ***)to CoFe_(2)O_(4)/3D-G(E_(1/2)=0.831 V ***,E_(j=10)=1.603 V ***).Furthermore,it demonstrates excellent bifunctional oxygen catalytic performance while maintaining high power density and stability in liquid zinc-air batteries(ZABs)and flexible ZABs(F-ZABs).This work presents a viable strategy for utilizing rare earth element doped spinels to enhance oxygen catalyst and ZABs performance.

关键词： Zn-air batteries Electrocatalysts La_(0.2)CoFe_(1.8)/3D-G Electron pump Bifunctional oxygen catalytic performance

Effect of various aromatic compounds with different functional groups on enzymatic hydrolysis of microcrystalline cellulose and alkaline pretreated wheat straw

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Journal of Bioresources and Bioproducts 2024年第2期9卷 211-221页

作者： Yufeng Yuan Xinyu Guo Bo Jiang Wenjuan Wu tingwei zhang Michael Sweeney Mehraj Ahmad Yongcan Jin Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsJiangsu Provincial Key Lab of Pulp and Paper Science and TechnologyNanjing Forestry UniversityNanjing 210037China School of Chemistry and Chemical Engineering Queen’s University BelfastBelfast BT71NNNorthern Ireland United Kingdom Department of Food Science and Engineering College of Light Industry and Food EngineeringNanjing Forestry UniversityNanjing 210037China

Low molecular aromatic compounds are detrimental to the enzymatic hydrolysis of ***,the specific role of their functional groups remains ***,a series of nine aromatic compounds as additives were tested to understand their effect on the hydrolysis yield of microcrystalline cellulose(MCC)and alkaline pretreated wheat *** on the results,the inhibition of aldehyde groups on MCC was greater than that of carboxyl groups,whereas for the alkaline pretreated wheat straw case,the inhibitory effect of aldehyde groups was lower than that of carboxyl *** methoxyl groups of aromatic compounds reduced the inhibitory ef-fect on enzymatic hydrolysis of both *** inhibition of aromatic compounds on MCC hydrolysis was detected in comparison with the alkaline pretreated wheat straw,indicating that the substrate lignin can offset the inhibition to a certain *** all aromatic com-pounds,syringaldehyde with one aldehyde group and two methoxyl groups improved the glucan conversion of the alkaline pretreated wheat straw.

关键词： Aromatic compound Functional group Enzymatic hydrolysis Alkaline pretreated wheat straw Microcrystalline cellulose

Incoherent excess noise spectrally encodes broadband light sources

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Light(Science & Applications) 2020年第1期9卷 358-366页

作者： Aaron M.Kho tingwei zhang Jun Zhu Conrad W.Merkle Vivek J.Srinivasan Department of Biomedical Engineering University of California DavisDavisCA 95616USA Department of Ophthalmology and Vision Science University of California Davis School of MedicineSacramentoCA 95817USA

Across optics and photonics,excess intensity noise is often considered a ***,we show that excess noise in broadband supercontinuum and superluminescent diode light sources encodes each spectral channel with unique intensity fluctuations,which actually serve a useful ***,we report that excess noise correlations can both characterize the spectral resolution of spectrometers and enable cross-calibration of their wavelengths across a broad *** to previous methods that use broadband interferometry and narrow linewidth lasers to characterize and calibrate spectrometers,our approach is simple,comprehensive,and rapid enough to be deployed during spectrometer ***,we employ this approach to aid alignment and reduce the depth-dependent degradation of the sensitivity and axial resolution in a spectrometer-based optical coherence tomography(OCT)system,revealing a new outer retinal ***,we achieve a pixel-to-pixel correspondence between two otherwise disparate spectrometers,enabling a robust comparison of their respective ***,excess intensity noise has useful applications in optics and photonics.

关键词： noise spectral optics

Low-latitude hydroclimate changes related to paleomagnetic variations during the Holocene in coastal southern China

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Frontiers of Earth Science 2024年第2期18卷 324-335页

作者： tingwei zhang Xiaoqiang YANG Jian YIN Qiong CHEN Jianfang HU Lu WANG Mengshan JU Qiangqiang WANG School of Earth Science and Engineering/Guangdong Provincial Key Laboratory of Geodynamics and Geohazards/Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yat-sen UniversityGuangzhou 510275China Institute of Cultural Heritage Shandong UniversityQingdao 266237China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

The variations in precipitation have displayed a complex pattern in different regions since the *** formation processes may have a significant impact on precipitation,especially during the tropical marine processes and summer monsoon which convey abundant water vapor to coastal southern China and inland ***,we use two 7500 year sedimentary records from the Pearl River Delta and the closed Maar Lake,respectively,in coastal southern China to reconstruct the mid-to-late-Holocene humidity variability and explore its possible relationship with cloud cover modulated by the Earth’s magnetic fields(EMF).Our proxy records document an apparent increase in wetness in coastal southern China between 3.0 and 1.8 kyr *** apparent increase in humidity appears to be consistent with the lower virtual axial dipole moments and,in turn,with a lower *** correlation suggests that the EMF might have been superimposed on the weakened monsoon to regulate the mid-to-late-Holocene hydroclimate in coastal southern China through the medium of galactic cosmic rays,aerosols,and cloud ***,further investigations are needed to verify this interaction.

关键词： hydroclimate variations Earth’s magnetic field coastal southern China the Holocene epoch

Systemic antibiotics increase microbiota pathogenicity and oral bone loss

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International Journal of Oral Science 2023年第1期15卷 99-112页

作者： Xulei Yuan Fuyuan Zhou He Wang Xinxin Xu Shihan Xu Chuangwei zhang Yanan zhang Miao Lu Yang zhang Mengjiao Zhou Han Li Ximu zhang tingwei zhang Jinlin Song Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences Chongqing Municipal Key Laboratory for Oral Biomedical Engineering of Higher EducationStomatological Hospital of Chongqing Medical UniversityChongqingChina

Periodontitis is the most widespread oral disease and is closely related to the oral *** oral microbiota is adversely affected by some pharmacologic *** antibiotics are widely used for infectious diseases but can lead to gut dysbiosis,causing negative effects on the human *** systemic antibiotic-induced gut dysbiosis can affect the oral microbiota or even periodontitis has not yet been *** this research,mice were exposed to drinking water containing a cocktail of four antibiotics to explore how systemic antibiotics affect microbiota pathogenicity and oral bone *** results demonstrated,for the first time,that gut dysbiosis caused by long-term use of antibiotics can disturb the oral microbiota and aggravate ***,the expression of cytokines related to Th17 was increased while transcription factors and cytokines related to Treg were decreased in the periodontal *** microbiota transplantation with normal mice feces restored the gut microbiota and barrier,decreased the pathogenicity of the oral microbiota,reversed the Th17/Treg imbalance in periodontal tissue,and alleviated alveolar bone *** study highlights the potential adverse effects of long-term systemic antibiotics-induced gut dysbiosis on the oral microbiota and periodontitis.A Th17/Treg imbalance might be related to this ***,these results reveal that the periodontal condition of patients should be assessed regularly when using systemic antibiotics in clinical practice.

关键词： Th17/Treg diseases reversed

Extracellular vesicles derived from human dental mesenchymal stem cells stimulated with low-intensity pulsed ultrasound alleviate inflammation-induced bone loss in a mouse model of periodontitis

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Genes & Diseases 2023年第4期10卷 1613-1625页

作者： tingwei zhang Ziqi Chen Mengyuan Zhu Xuan Jing Xiaohui Xu Xulei Yuan Mengjiao Zhou Yanan zhang Miao Lu Duanjing Chen Shihan Xu Jinlin Song Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences Chongqing Municipal Key Laboratory for Oral Biomedical Engineering of Higher Educationand Stomatological Hospital of Chongqing Medical UniversityChongqing 401147China

Extracellular vesicles(EVs)derived from mesenchymal stem cells(MSCs)have emerged as a new mode of intercellular crosstalk and are responsible for many of the thera-peutic effects of *** promote the application of MSC-EVs,recent studies have focused on the manipulation of MSCs to improve the production of EVs and EV-mediated *** current paper details an optimization method using non-invasive low-intensity pulsed ul-trasound(LIPUS)as the stimulation for improving oral MSC-EV production and *** cells from apical papilla(SCAP),a type of oral mesenchymal stem cell,displayed inten-sity-dependent pro-osteogenic and anti-inflammatory responses to LIPUS without significant cytotoxicity or *** stimuli increased the secretion of EVs by promoting the expres-sion of neutral sphingomyelinases in *** addition,EVs from LIPUS-induced SCAP exhibited stronger efficacy in promoting the osteogenic differentiation and anti-inflammation of peri-odontal ligament cells in vitro and alleviating oral inflammatory bone loss in *** addition,LIPUS stimulation affected the physical characteristics and miRNA cargo of *** investigations indicated that miR-935 is an important mediator of the pro-osteogenic and anti-inflammatory capabilities of LIPUS-induced *** together,these findings demonstrate that LIPUS is a simple and effective physical method to optimize SCAP-EV produc-tion and efficacy.

关键词： Extracellular vesicles Low-intensity pulsed ultrasound Oral bone loss Periodontitis Stem cells from apical papilla

PolInSAR森林高度反演中方法及波段选择引起的不确定性分析

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遥感学报 2022年第10期26卷 1963-1975页

作者：张庭苇姬永杰张王菲西南林业大学林学院昆明650224 长沙市规划信息服务中心长沙410004 西南林业大学地理与生态旅游学院昆明650224

森林高度是反映森林资源数量和质量的重要参数,极化干涉合成孔径雷达PolInSAR(Polarimetric Synthetic Aperture Radar Interferometry)技术在森林高度反演中极具潜力。由于森林散射特征受波长影响明显,由此引起的散射机理差异使得基于P... 详细信息

森林高度是反映森林资源数量和质量的重要参数,极化干涉合成孔径雷达PolInSAR(Polarimetric Synthetic Aperture Radar Interferometry)技术在森林高度反演中极具潜力。由于森林散射特征受波长影响明显,由此引起的散射机理差异使得基于PolInSAR技术反演的森林高度结果具有很大的不确定性。为了定量化该不确定性的影响,本文以模拟森林场景为例,对PolInSAR技术森林高度反演中常用的4种方法——极化相位中心高度估测法、复相干相位中心差分法、复相干幅度反演法以及相干幅度、相位联合反演法,以及它们在常用的4个微波波段P、L、C和X中的森林高度估测结果进行了分析;明确了匀质森林场景中,算法、波段选择引起的森林高度估测结果的不确定性。研究结果表明:在森林场景基本一致的情况下,估测算法的选择直接影响森林高度估测结果,其中复相干幅度反演法在4个波段的估测结果中精度均最高,但各估测点的估测结果离散度及不确定度较大。波长对4类估测方法估测结果的影响差异明显:复相干幅度反演法的反演结果几乎不受波长的影响,而相干幅度、相位联合反演法受波长影响明显,在P和L波段反演结果中精度较高,在C和X波段反演结果中精度降低明显。此外,以传统的交叉极化(HV)相位代表冠层散射相位中心,水平同极化与垂直同极化的相位差(HH-VV)代表地表散射相位中心,采用复相干相位中心差分法进行森林高度估测会出现严重低估现象。估测结果不确定度具有波长和算法选择依赖性,在C和X波段采用复相干相位中心差分法估测结果不确定度最低,在P和L波段采用极化相位中心高度估测法估测结果不确定度最低,而复相干幅度反演法估测结果则在多个波段中的不确定度均最高。

关键词： PolInSAR 森林高度不确定性反演模拟森林场景

规划理论作为一种制度创新——论规划理论的多向性和理论发展轨迹的非线性

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城市规划 2006年第8期30卷 9-18页

作者：张庭伟美国伊利诺伊大学

通过对1930年以来美国规划理论发展的回顾并对比中国规划工作的演化,提出:规划工作的本质是特定社会条件下、应对当时当地社会需求做出的一种制度安排。由于现代社会变化的多元性,社会发展方向的多向性,以及社会发展受偶发事件影响而出... 详细信息

通过对1930年以来美国规划理论发展的回顾并对比中国规划工作的演化,提出:规划工作的本质是特定社会条件下、应对当时当地社会需求做出的一种制度安排。由于现代社会变化的多元性,社会发展方向的多向性,以及社会发展受偶发事件影响而出现的曲折性,作为一种制度安排的城市规划同样表现出理论的多向性和理论发展轨迹的非线性。规划理论的变迁,其本质是在特定社会中不断的制度创新。只要社会在发展,就会有对相应制度安排的新要求,规划理论就将继续发展。中国规划理论的建立,必须从中国制度创新的高度来理解。

关键词：城市规划理论美国规划理论中国规划理论制度创新

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解析城市规划

城市规划 2024年第12期48卷 4-9页

作者：张庭伟[美] 不详

回顾1980年代以来美国规划界的转变,指出城市规划在外界经济政治变化中作出改变是国际普遍现象,只要固本守正,把握变化,城市规划不但有继续存在的必要,而且有更新的契机。新情况下城市规划需要进行更新式转型:既要固本,又要更新,但不会... 详细信息

回顾1980年代以来美国规划界的转变,指出城市规划在外界经济政治变化中作出改变是国际普遍现象,只要固本守正,把握变化,城市规划不但有继续存在的必要,而且有更新的契机。新情况下城市规划需要进行更新式转型:既要固本,又要更新,但不会消亡。实现规划的更新式转型需要动态理解规划的本质、工作对象和服务对象的变化,要善用新工具,更需要提升规划理念。

关键词：中国城市规划美国规划更新式规划转型规划理念