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Construction of n-TiO_(2)/p-Ag_(2)O Junction on Carbon Fiber Cloth with Vis-NIR Photoresponse as a Filter-Membrane-Shaped Photocatalyst

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Advanced Fiber Materials 2020年第1期2卷 13-23页

作者： Gumila Duoerkun Yan Zhang Zhun Shi Xiaofeng shen Wei Cao Ting Liu Jianshe Liu Quanyuan Chen lisha Zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

The development of effective and reusable photocatalysts with broad-spectra activity has attracted ***,we have constructed n-TiO_(2)/p-Ag_(2)O junction on carbon fiber(CF)cloth as an efficient and recyclable *** CF cloth as the substrate,TiO_(2) nanorods(length:1-2μm)are prepared by a hydrothermal process,and the in-situ growth of Ag_(2)O nanoparticles(10-20 nm)is then realized by chemical bath deposition *** flexible CF/TiO_(2)/Ag_(2)O cloth(area:4×4 cm^(2))shows a broad and strong photo-absorption(200-1000 nm).Under the illumination of visible-light(λ>400 nm),CF/TiO_(2)/Ag_(2)O cloth can efficiently eliminate 99.2%rhodamine B(RhB),99.4%acid orange 7(AO7),87.6%bisphenol A(BPA),and 89.5%hexavalent chromium(Cr^(6+))in 100 min,superior to CF/Ag_(2)O cloth(83.5%RhB,60.0%AO7,31.2%BPA and 41.8%Cr^(6+)).In particular,under the NIR-light illumination(980 nm laser),CF/TiO_(2)/Ag_(2)O cloth can remove 70.9%AO7 and 60.0%Cr^(6+) in 100 min,which are significantly higher than those by CF/Ag_(2)O cloth(19.8%AO7 and 18.9%Cr^(6+)).In addition,CF/TiO_(2)/Ag_(2)O cloth(diameter:10 cm),as a filter-membrane,can effectively wipe off 94.4%flowing RhB solution(rate:~1 L h^(−1))at 6th filtering/degrading ***,CF/TiO_(2)/Ag_(2)O cloth can be used as a Vis-NIR-responded filter-membrane-shaped photocatalyst with high-efficiency for purifying wastewater.

关键词： Carbon fiber cloth n-TiO_(2)/p-Ag_(2)O junction Vis-NIR photoresponse Photocatalyst Filter-membrane

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Synthesis of ZnWO4-x xnanorods with oxygen vacancy for efficient photocatalytic degradation of tetracycline

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Progress in Natural Science:Materials International 2018年第4期28卷 408-415页

作者： Maurice I.Osotsi Daniel K.Macharia Bo Zhu Zhaojie Wang Xiaofeng shen Zixiao Liu lisha Zhang Zhigang Chen State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University State Environmental Protection Engineering Center for Pollution Treatment andControl in Textile Industry College of Environmental Science and Engineering Donghua University

Persistent organic pollutants(POPs)especially tetracycline pose a great threat to human health,and the photocatalytic degradation of tetracycline by ZnWO4nanomaterials has drawn much *** improve the photo-response range and photoactivity,we prepared ZnWO4-xsample with oxygen vacancies by solvothermally treating Zn(NO3)3and Na2WO4in water/ethanol/PEG-400 mixture where ethanol could act as a reducing agent to selectively remove some oxygen atoms from ***4-xsample is composed of nanorods with length of～50 nm and diameter of～20 ***,ZnWO4-xnanorods are brown and exhibit the obviously broadened photoabsorption from ultraviolet(UV)to near infrared(NIR)region,compared with the tradition white ZnWO4nanorod without oxygen vacancies and with UV absorption edge of 365 *** the irradiation of UV or ultraviolet-visible-near infrared(UV–Vis–NIR)light,ZnWO4-xnanorods can photocatalytically degrade 91%or 78%tetracycline,higher than those(67%or 71%)by *** enhanced photocatalytic efficiency can be attributed to the introduction of oxygen vacancies which have been found to reduce photogenerated electron-hole pair recombination and narrow band gap.

关键词： ZnWO4-x Oxygen vacancies Persistent organic pollutants (POPs) Tetracycline Photocatalytic Activity

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Macrophage-derived small extracellular vesicles promote biomimetic mineralized collagen-mediated endogenous bone regeneration

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International Journal of Oral Science 2020年第4期12卷 317-326页

作者： Anqi Liu Shanshan Jin Cuicui Fu shengji Cui Ting Zhang lisha Zhu Yu Wang Steve G.F.shen Nan Jiang Yan Liu Department of Oral and Maxillofacial Surgery Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai Key Laboratory of StomatologyShanghaiChina Laboratory of Biomimetic Nanomaterials Department of OrthodonticsPeking University School and Hospital of StomatologyNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijingChina Department of Oral Biochemistry Academic Centre for Dentistry Amsterdam(ACTA)University of Amsterdam(UvA)and Vrije Universiteit Amsterdam(VU)Gustav Mahlerlaan 3004AmsterdamThe Netherlands Shanghai University of Medicine and Health Sciences ShanghaiChina Central Laboratory Peking University School and Hospital of StomatologyNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijingChina

Macrophages play an important role in material-related immune responses and bone formation,but the functionality of macrophage-derived extracellular vesicles(EVs)in material-mediated bone regeneration is still ***,we evaluated intracellular communication through small extracellular vesicles(sEVs)and its effects on endogenous bone regeneration mediated by biomimetic intrafibrillarly mineralized collagen(IMC).After implantation in the bone defect area,IMC generated more neobone and recruited more mesenchymal stem cells(MSCs)than did extrafibrillarly mineralized collagen(EMC).More CD63+CD90+and CD63+CD163+cells were detected in the defect area in the IMC group than in the EMC *** determine the functional roles of sEVs,extracellular vesicles from macrophages cultured on different mineralized collagen were isolated,and they showed no morphological ***,macrophage-derived sEVs in the IMC group showed an enhanced Young’s modulus and exerted beneficial effects on the osteogenic differentiation of bone marrow MSCs by increasing the expression of the osteoblastic differentiation markers BMP2,BGLAP,COL1,and OSX and calcium nodule ***,sEVs from IMC-treated macrophages facilitated MSC osteogenesis through the BMP2/Smad5 pathway,and blocking sEV secretion with GW4869 significantly impaired MSC proliferative,immunomodulative and osteogenic *** together,these findings show that macrophage-derived sEVs may serve as an emerging functional tool in biomaterial-mediated endogenous bone regeneration.

关键词： endogenous CD63 mediated

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Identification of A Strain HN-1 against Banana Wilt Disease and Determination of Its Antagonism

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Plant Diseases and Pests 2013年第4期4卷 12-16页

作者： shen Linbo Xiong Guoru Dong lisha Kong Ran Guo Ting Zhang Shuzhen Sugarcane Research Center Institute of Tropical Bioscience and BiotechnologyCATAS / Key Laboratory of Biology and Genetic Resources of Tropical CropsMinistry of Agriculture College of Agriculture Hainan University

[Objective] The paper was to identify strain HN-1 against banana wilt disease and to determine its antagonism. [Method] The strain HN-1 was ob- tained from the soil in fields heavily infected by Fusarium oxysporum f. sp. cubense （FOC）. Antagonism of the strain against F. oxysporum was tested via dual-cul- ture and inhibition test on spore germination. [Result] HN-1 effectively inhibited mycelial growth and spore germination of F. oxysporum, Strain HN-1 was identi- fied as BrevibaciUus brevis according to its characteristics in morphology, physiology and biochemistry and its 16S rDNA sequence. The strain showed high inhibition effect on 15 species of fungal pathogens in the dual-culture trials with fungal pathogens. [ Conclusion] The study provides theoretical basis for application of strain HN-1 in agricultural fields.

关键词： Banana wilt disease BrevibaciUus brevis HN-1 Antagonism

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Target-triggered assembly of net-like DNA nanostructure for intracellular imaging of biomolecules

Target-triggered assembly of net-like DNA nanostructure for ...

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中国化学会第十三届全国分析化学年会

作者： Huo Xu lisha Wang Yifan Jiang Zhifa shen Zai-sheng Wu Cancer Metastasis Alert and Prevention Center Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment and Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy College of Chemistry Fuzhou University Key Laboratory of Laboratory Medicine Ministry of Education of China Zhejiang Provincial Key Laboratory of Medicine Genetics School of Laboratory Medicine and Life Sciences Institute of Functional Nucleic Acids and Personalized Cancer Theranostics Wenzhou Medical University

Visualization, sensitive, specific and stable detection of tumor suppressor-or oncogene-microRNAs（miRNAs） remains challenging and is highly significant for clinical diagnostics. To solve this problem, we have developed a target-triggered assembly of net-like DNA nanostructure for intracellular miRNA imaging based on branched hybridization chain reaction（HCR）. In this approach, only two hairpin-shaped metastable probes（HP1 and HP2） were involved. Intracellular miRNAs trigger the self-assembly of net-like DNA nanostructure in the cytoplasm with high efficiency and stability, achieving the goal of improved signal amplification capacity（1:N） for the low expression of miRNA in the complex intracellular environment. The process of target-triggered net-like nanostructure assembly was confirmed by nPAGE analysis. Moreover, its morphologies were validated by AFM images, and the specificity and sensitivity of intracellular miRNA were also demonstrated by confocal laser scanning microscopy and flow cytometry. By taking advantage of intelligent design, the proposed method provides an effective, universal, stable and platform for miRNA detection in living cells.

关键词： intracellular miRNA hybridization chain reaction(HCR) nanostructure imaging

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心音信号的非高斯AR模型双谱分析

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中国生物医学工程学报 2000年第1期19卷 72-77页

作者：沈民奋孙丽萍沈凤麟汕头大学科研处汕头515063 中国科技大学电子工程与信息科学系合肥230026

本文利用高阶谱分析方法 ,提出以非高斯参数模型对心音信号进行双谱分析与分类。采用具有非高斯白噪声激励的参数模型对心音 (PCG)信号进行建模 ,由导出的基于累积量的三阶递推方程估计模型参数 ,并对心音信号进行参数化双谱估计。其次 ... 详细信息

本文利用高阶谱分析方法 ,提出以非高斯参数模型对心音信号进行双谱分析与分类。采用具有非高斯白噪声激励的参数模型对心音 (PCG)信号进行建模 ,由导出的基于累积量的三阶递推方程估计模型参数 ,并对心音信号进行参数化双谱估计。其次 ,对心音信号的非高斯AR模型的定阶进行讨论 ,提出采用双谱互相关法估计心音信号的模型阶次。另外 ,利用非高斯AR模型参数构成特征向量 ,对正常心音和病理性心音进行二类模式分类。最后 ,对实际心音信号进行分析 ,结果表明利用双谱技术分析心音信号是一种新的有效方法 ,有助于心音信号的定量分析并为某些心脏疾病的早期诊断提供新的辅助信息。

关键词：心音信号非高斯AB模型双谱分析

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缺陷漏磁成像技术综述

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电工技术学报 2016年第20期31卷 55-63页

作者：黄松岭彭丽莎赵伟王珅电力系统国家重点实验室(清华大学) 北京100084

缺陷漏磁成像技术一直是无损检测领域的研究热点之一,也是铁磁性构件缺陷检测与评估的重要手段。本文从缺陷的漏磁数据可视化、缺陷轮廓的二维漏磁成像以及缺陷的三维漏磁成像三个阶段,对缺陷漏磁成像技术的发展历程进行归纳梳理,详细... 详细信息

缺陷漏磁成像技术一直是无损检测领域的研究热点之一,也是铁磁性构件缺陷检测与评估的重要手段。本文从缺陷的漏磁数据可视化、缺陷轮廓的二维漏磁成像以及缺陷的三维漏磁成像三个阶段,对缺陷漏磁成像技术的发展历程进行归纳梳理,详细介绍了各阶段常用的成像方法。并在此基础上,讨论了缺陷漏磁成像技术的研究方向和发展趋势。

关键词：漏磁检测可视化缺陷重构三维漏磁成像图像处理技术

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漏磁图像的改进灰度级—彩色变换法

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清华大学学报（自然科学版） 2015年第5期55卷 592-596页

作者：彭丽莎王珅刘欢黄松岭赵伟清华大学电机系电力系统国家重点实验室北京100084 中国矿业大学(北京)机电与信息工程学院北京100083

漏磁图像的伪彩色图比灰度图具有更好的辨识效果。该文在2种传统的伪彩色编码方法的基础上,提出了一种改进的灰度级—彩色变换法。首先根据漏磁特点确定变换的初步分段线性表达式,再利用最大类间方差法对灰度值进行聚类划分,计算出表达... 详细信息

漏磁图像的伪彩色图比灰度图具有更好的辨识效果。该文在2种传统的伪彩色编码方法的基础上,提出了一种改进的灰度级—彩色变换法。首先根据漏磁特点确定变换的初步分段线性表达式,再利用最大类间方差法对灰度值进行聚类划分,计算出表达式各段的节点值,最终得到变换后的伪彩色图像。该方法根据实际的灰度值数据确定变换的具体表达式,具有良好的自适应性。通过实验对比,该方法得到的图像清晰且颜色鲜明,更有利于漏磁特征识别。

关键词：漏磁图像伪彩色图像灰度级-彩色变换法最大类间方差法

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压水堆核电站无损检测与状态监测研究综述

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机械工程学报 2022年第4期58卷 1-13页

作者：黄松岭孙洪宇王珅赵伟彭丽莎清华大学电机系北京100084 清华大学电力系统及发电设备控制和仿真国家重点实验室北京100084

核电站无损检测和状态监测对保障核电站安全稳定运行具有重要意义,在役的不同类型的传感器也在发挥着其独特的作用。在基于新型传感技术的背景下,对核电站的无损检测、状态监测和传感系统优化方法进行全面综述。研究并阐述常规超声、相... 详细信息

核电站无损检测和状态监测对保障核电站安全稳定运行具有重要意义,在役的不同类型的传感器也在发挥着其独特的作用。在基于新型传感技术的背景下,对核电站的无损检测、状态监测和传感系统优化方法进行全面综述。研究并阐述常规超声、相控阵超声、激光超声和电磁超声等主流的超声检测诸多方法的同时,也对其他检测无损检测手段进行对比分析。论述和总结基于光纤传感的新型核电站状态监测方法,并讨论不同光纤材料在状态参数测量中的适用性。调研和概括大规模复杂核电站传感系统的优化和状态监测方法以及传感器的状态监测后端所涉及的信息分析手段,并依据当今的先进工业互联网和人工智能技术对核电站的无损检测和状态监测未来发展给出设想。

关键词：传感技术无损检测状态监测压水堆核电站

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大环内酯类抗生素微生物降解的研究进展

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生物工程学报 2021年第11期37卷 3975-3987页

作者：柯霞沈逸曹丽莎张博柳志强浙江工业大学生物工程学院浙江杭州310014

甾醇是一种环戊烷多氢菲衍生物,是真核细胞的重要生物膜组分,具有多种生物学活性,是食品、制药等行业的重要原料。酿酒酵母具有天然的麦角甾醇合成途径,是实现甾醇类衍生物从头合成的理想底盘细胞。近年来,细胞器的理性改造技术为实现... 详细信息

甾醇是一种环戊烷多氢菲衍生物,是真核细胞的重要生物膜组分,具有多种生物学活性,是食品、制药等行业的重要原料。酿酒酵母具有天然的麦角甾醇合成途径,是实现甾醇类衍生物从头合成的理想底盘细胞。近年来,细胞器的理性改造技术为实现目标产物的定向存储、转运并最终为产物的合成强化提供了新的理性改造策略。文中重点阐述了酿酒酵母细胞在不同生理胁迫下甾醇合成及转运的反馈应激表型及相关的分子作用机理,指出构建酵母细胞中甾醇的定向存储、转运及胞外分泌途径的人工强化途径是突破酵母细胞甾醇合成极限的新策略。

关键词：酿酒酵母甾醇存储与转运脂滴理性改造

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