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Ion transport-related resistive switching in film sandwich structures

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Chinese Science Bulletin 2014年第20期59卷 2363-2382页

作者： Xiao-jian Zhu Jie Shang gang liu Run-Wei Li Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences

Resistive switching memories based on ion transport and related electrochemical reactions have been extensively studied for *** utilize the resistive switching memories for high-performance information storage applications,a thorough understanding of the key information of ion transport process,including the mobile ion species,the ion transport paths,as well as the electrochemical reaction behaviors of these ions should be provided for material and device ***,ion transport is usually accompanied by processes of microstructure modification,phase transition,and energy band structure variation that lead to further modulation of other physical properties,e.g.,magnetism,optical emission/absorbance,etc.,in the resistive switching ***,novel resistive switching memories that are controlled through additional means of magnetic or optical stimulus,or demonstrate extra functionalities beyond information storage,can be made possible via well-defined ion transportation in various switching materials and *** this contribution,the mechanism of ion transport and related resistive switching phenomena in thin film sandwich structures is discussed first,followed by a glanceat the recent progress in the development of high-performance and multifunctional resistive switching memories.A brief perspective of the ion transport-based resistive switching memories is addressed at the end of this review.

关键词：离子迁移开关现象夹层结构电阻式薄膜运输电化学反应信息存储

A New Method to Study the Sol-gel Transition Process of Organic/Inorganic Hybrid Materials

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Chemical Research in Chinese Universities 2005年第5期21卷 606-610页

作者： GUO Bin GAO jian-gang CHEN Da-zhu liu jian-ping HE Ping-sheng ZHANG Qi-jin Structure Research Laboratory University of Science and Technology of China Hefei 230026 P. R. China Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 P. R. China

The sol-gel transition process of PMMA/SiO2 hybrid materials was first studied by means of the dynamic torsional vibration method. The different stages of the transition can be described by the change of torque. The temperature-dependent measurement of the gel time（ tg ） gives the possibility to determine the apparent activation energy.（ Ea ） of this transition according to Flory＇s gelation theory. The non-equilibrium thermodynamic fluctuation theory was used to predict the transition behavior. The isothermal transition experiments on hybrid sols with different TEOS（tetraethyl orthosilicate） contents were carried out. The results show that the Ea of a hybrid sol is higher than that of a non- hybrid sol of a TEOS-water-ethanol system. The increasing of TEOS content in a hybrid sol has no obvious effect on the Ea value, but it can enhance the sol-gel .reaction rate.

关键词： Sol-gel transition Organic/inorganic Hybrid material DTVM

Low carbon storage of woody debris in a karst forest in southwestern China

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Acta Geochimica 2019年第4期38卷 576-586页

作者： Yangyang Wu Libin liu Chunzi Guo Zhonghua Zhang gang Hu jian Ni State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesLincheng West Road 99Guiyang 550081China University of Chinese Academy of Sciences Yuquan Road 19ABeijing 100049China Puding Karst Ecosystem Research Station Chinese Academy of SciencesPudingAnshun 562100China College of Chemistry and Life Sciences Zhejiang Normal UniversityYingbin Avenue 68& Jinhua 321004China Haihe River Water Resources Protection Bureau Haihe River Water Conservancy CommissionThe Ministry of Water Resources of the People's Republic of ChinaLongtan Road 15Tianjin 300170China School of Enviroment and Life Science Guangxi Teachers Education UniversityMingxiu East Road 175Nanning 530001China Key Laboratory of Environment Change and Resources Use in Beibu Gulf Ministry of EducationMingxiu East Road 175Nanning 530001China

The properties of woody debris(WD) vary across different forests under various soil *** to the relatively shallow and low amounts of soils on karst terrains, it is necessary to determine the WD carbon inventory of karst forests. In this study, we recorded WD with a basal diameter for standing snags and the largeend diameter for fallen logs of ≥ 1 cm. The carbon density of WD in a secondary karst mixed evergreen and deciduous broad-leaved forest that had been clear-cut 55 years ago in southwestern China were inventoried in a 2 ha plot. Woody debris carbon density calculated using specific gravity and carbon concentration was 4.07 Mg C ha^-1. Woody debris with diameters ≥ 10 cm(coarse WD) constituted 53.8% of total carbon storage whereas WD < 10 cm in diameters(fine WD) accounted for more pieces of WD(89.9%).Lithocarpus confinis contributed the most WD carbon(26.5%). Intermediate decayed WD was relatively more abundant, but WD with final decay contributed the least to the total pieces of WD(6.7%). The contribution of WD to carbon storage of karst forest was low compared to other forests worldwide. Significant positive correlations were found between WD carbon and biodiversity(R^2= 0.035,p < 0.01) and elevation(R^2= 0.047, p < 0.01) and negative correlations was found in outcrop coverage(R^2= 0.034, p <0.01). Further studies are needed to elucidate the ecological functions of WD to better understand their roles in maintaining biodiversity, enhancing productivity, and controlling vegetation degradation in karst forest ecosystems.

关键词： Secondary forest Fine woody debris Coarse woody debris Dead wood Karst Subtropical China

Effect of microkeratome suction duration on corneal flap thickness and diameter in pigs

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International Journal of Ophthalmology(English edition) 2010年第2期3卷 125-127页

作者： Xiao-Li Ma jian-gang Xu and Han-Qiang liu Department of Ophthalmology the First Affiliated Hospital of China Medical University Shenyang 110001 Liaoning Province China

AIMTo determine the effect of suction duration on thickness and diameter of corneal flap created by microkeratome in porcine eyes in laser in situ keratomileusis (LASIK).

关键词： suction duration lamellar corneal flap thickness LASIK

Online Consensus Control of Nonlinear Affine Systems From Disturbed Data

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 551-553页

作者： Yifei Li Wenjie liu jian Sun Chen Chen Jia Zhang gang Wang National Key Laborary of Autonomous Intelligent Unmanned Systems Beijing Institute of TechnologyBeijing 100081 Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

Dear Editor,In this letter, we introduce a novel online distributed data-driven robust control approach for learning controllers of unknown nonlinear multi-agent systems(MASs) using state-dependent representations.

关键词： agent online Online

Enteral nutrition combined with glutamine promotes recovery after ileal pouch-anal anastomosis in rats

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World Journal of Gastroenterology 2018年第5期24卷 583-592页

作者： Yan-Yan Xu An-Qi He gang liu Kai-Yu Li jian liu Tong liu Department of General Surgery Tianjin Medical University General Hospital

AIM To assess the effect of enteral nutrition(EN) supplemented with glutamine on recovery after ileal pouch-anal anastomosis(IPAA) in rats, to provide an experimental basis for nutritional support in patients with ulcerative colitis(UC) after IPAA. METHODS Male Sprague-Dawley(SD) rats were randomly divided into three groups(n = 8) after IPAA operation using a microsurgical technique. From the third postoperative day, rats in the control group, EN group, and immune nutrition(IN) group were fed standard rat chow, short peptide EN, and short peptide EN combined with glutamine ad libitum, respectively. The rats' general condition was observed throughout the study. Serum levels of total protein(TP), albumin(ALB), prealbumin(PA), and transferrin(TF) were detected on the 30 th postoperative day, using an automatic biochemical analyzer. The ileal pouch mucosa was stained with hematoxylin and eosin(HE), and occludin protein levels were detected by *** The body weight of rats in the EN group(359.20 ± 10.06 g) was significantly higher than that in the control group(344.00 ± 9.66 g)(P 0.05 for all). CONCLUSION EN combined with glutamine may effectively improve nutritional status after IPAA. Our results suggest a benefit of glutamine supplementation in EN for UC patients undergoing IPAA, although human st

关键词： Enteral nutrition Glutamine Ileal pouchanal anastomosis Nutritional status Recovery

A new track for antibacterial treatment:Progress and challenges of using cytomembrane-based vesicles to combat bacteria

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Particuology 2023年第7期78卷 136-146页

作者： Jiaxuan Xie Xuan liu gang liu State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics National Institute of Diagnostics and Vaccine Development in Infectious DiseasesSchool of Life SciencesSchool of Public HealthXiamen UniversityXiamen361102China Center for Molecular Imaging and Translational Medicine School of Public HealthXiamen UniversityXiamen361102China

The emergence and re-emergence of antibiotic-resistant bacteria,especially superbugs,are leading to complicated infections that are increasingly difficult to ***,novel alternative antimicrobial therapies are urgently needed to reduce the morbidity and mortality caused by antibiotic *** development of biomimetic-based therapy is expected to provide innovative means for addressing this challenging *** a kind of novel biomaterial,cytomembrane-based vesicles(MVs)continue to receive considerable attention in antimicrobial therapy owing to their inherent biocompatibility,design flexi-bility,and remarkable ability to interact with biological molecules or the surrounding *** remarkable cell-like properties and their inherent interaction with pathogens,toxins,and the immune system underlie MVs-based functional protein therapy and targeted delivery to develop advanced therapeutic strategies against bacterial *** review provides a fundamental under-standing of the characteristics and physiological functions of cytomembrane-based vesicles,focusing on their potential to combat bacterial infections,including detoxification,immune modulation,antibiotics delivery,and physical *** addition,the future possibilities and remaining challenges for clinically implementing MVs in the field of antibacterial treatment are discussed.

关键词： Cytomembrane-basedvesicles Bacterial resistance Antibacterial therapy Drug delivery

Orientation dependence of elastic properties in orthorhombic Ca_3Mn_2O_7

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Chinese Physics B 2019年第2期28卷 369-375页

作者： gang jian Mei-Rui liu Chen Zhang Jie Lu Chao Yan School of Materials Science and Engineering jiangsu University of Science and Technology School of Materials Science and Engineering Georgia Institute of Technology Atlanta 30332

Elastic properties are important in fundamental understanding of multiferroic materials. However, up to now, there is no work about anisotropy of elastic properties in orthorhombic Ca_3Mn_2O_7. In this study, using coordinate transformation method, we investigated basic elastic parameters(elastic constants c'_(ij)) and engineering elastic parameters(Young's modulus E, Poisson's ratio v, and the rigidity modulus G') of orthorhombic Ca_3Mn_2O_7 along arbitrary orientations. The detailed anisotropic characteristics of these parameters were presented. The results reveal the orientation related elastic properties in mm2 point group orthorhombic Ca_3Mn_2O_7.

关键词： Ca3Mn2O7 elastic properties coordinate transformations orientation dependence

A Biosurfactant-containing TSD Strategy to Modify Bovine Pericardial Bioprosthetic Valves for Anticalcification

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Chinese Journal of Polymer Science 2023年第1期41卷 51-66页

作者： Cai-Yun Gao gang Wang Lin Wang Qun-Song Wang Han-Cheng Wang Lin Yu jian-Xiong liu jian-Dong Ding State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200438China R&D Center Lifetech Scientific(Shenzhen)Co.Ltd.Shenzhen518057China R&D Center Lifevalve Medical Scientific Co.Ltd.Shenzhen518057China

Bioprosthetic heart valves(BHVs)are important for transcatheter valve *** commercial BHVs on the market are basically porcine or bovine pericardium(BP)crosslinked with glutaraldehyde(GA).Simply applying GA to BHVs can enhance mechanical stability,but cannot alleviate in vivo *** this work,we developed a two-step decellularization(TSD)strategy to modify this biomacromolecular network,in which BP was post-treated,as the second step of decellularization,with a mild biosurfactant n-dodecyl-β-D-maltoside in a mixture of isopropanol and phosphate-buffered saline after the first step of traditional decellularization and GA *** TSD-treated BP exhibited not only low cytotoxicity and excellent mechanical properties in vitro,but also low immune responses and significant anticalcification in *** 60 days of subcutaneous implantation in the back of Wistar rats,the calcium content was,as quantified with an inductively coupled plasma optical emission spectrometer,only 1.1µg/mg compared to 138.6µg/mg in the control group without the *** addition,collagen fibrils were observed with field emitting scanning electron microscopy(SEM),and the morphology and composition of the calcified sites resulting from in vivo biomineralization were studied with SEM with energy dispersive spectroscopy and also X-ray *** study proposes a facile yet effective anticalcification strategy for the modification of the bovine pericardial bioprosthetic heart valve,a natural biomacromolecular network.

关键词： Heart valve Anticalcification Collagen In vivo biomineralization Transcatheter aortic valve implantation(TAVI) Extracellular matrix Biomacromolecular network Biosurfactant Bovine pericardium