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Bioinspired flexible,high-strength,and versatile hydrogel with the fiberboard-and-mortar hierarchically ordered structure

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Nano Research 2021年第10期14卷 3643-3652页

作者： Han-ping Yu Ying-Jie zhu State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The synthetic hydrogels with high water contents are promising for various applications,however,they usually exhibit low mechanical *** this work,inspired by the natural biological soft tissues,whose hierarchically ordered fibrous structures result in high strength and good flexibility,a flexible,high-strength,and versatile hydrogel with the fiberboard-and-mortar hierarchically ordered structure(HFMOS)is developed based on ultralong hydroxyapatite(HAP)nanowires and polyacrylic acid(PAA).The as-prepared HFMOS hydrogel has a high water content(~70 wt.%),dense structure,and excellent mechanical properties,and these properties are similar to those of the human cartilage and are superior to many hydrogels reported in the *** excellent mechanical properties of the HFMOS hydrogel originate from the combination of the fiberboard-and-mortar hierarchically ordered structure,reinforcement of ultralong HAP nanowires,strong interfacial strength,and multiple energy dissipation ***,thanks to the controllable components and injection procedure,the HFMOS hydrogel with a Janus structure is prepared for particular *** HFMOS hydrogel possesses abundant ordered water channels,and can be used for loading,release,and directed delivery of various functional ***,the as-prepared flexible,high-strength,and versatile HFMOS hydrogel possesses a great potential for various applications such as water purification,pollution treatment,biomedicine,nanofluidic devices,and high-performance structural materials.

关键词： hydrogel nanowire hydroxyapatite ordered structure

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黄斑部视网膜出血的临床分析

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国际眼科杂志 2005年第4期5卷 688-690页

作者：吕沛霖梁厚成胡玉红赵燕麟李英泰朱秀萍中国陕西省西安市第一医院眼科西安市眼科研究所 710002 新疆建设兵团医院眼科

目的:探讨黄斑部视网膜出血的出血原因、部位和程度,并分析对中心视力的影响。方法:对85例黄斑部视网膜出血患者的临床资料,结合FFA检查对发病后中心视力、出血部位、面积、程度进行回顾性分析。结果:85例黄斑部视网膜出血患者发病时中... 详细信息

目的:探讨黄斑部视网膜出血的出血原因、部位和程度,并分析对中心视力的影响。方法:对85例黄斑部视网膜出血患者的临床资料,结合FFA检查对发病后中心视力、出血部位、面积、程度进行回顾性分析。结果:85例黄斑部视网膜出血患者发病时中心视力损害严重,依出血部位分为视网膜前出血、视网膜内出血、视网膜下出血、混合性出血,依出血程度分为轻度、中度、重度和巨大出血。结论:各种原因导致黄斑部视网膜出血影响中心视力重要因素是出血遮蔽,出血面积和部位影响出血的吸收和视功能的恢复。

关键词：黄斑部视网膜出血临床分析中心视力视功能

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A Nonlinear Diffusion Model for Image Restoration

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Acta Mathematicae Applicatae Sinica 2016年第3期32卷 631-646页

作者： Yong-gui zhu Xin-yan YU Bin ZHANG xiu-xiu NIU School of Science Communication University of China

In this paper, we study the ill posed Perona-Malik equation of image processing[14] and the regularized P-M model i.e. C-model proposed by Catte et al.[4]. The authors present the convex compound of these two models in the form of the system of partial differential equations. The weak solution for the equations is proved in detail. The additive operator splitting （AOS） algorithm for the proposed model is also given. Finally, we show some numeric experimental results on images.

关键词： Perona-Malik model C-model weak solutions AOS algorithm

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Enantiomeric Separation of Amino Alcohols by Ion-pair Chromatography

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Chinese Chemical Letters 2001年第4期12卷 355-356页

作者： Ming Hua HU xiu zhu XU Department of Chemistry Zhejiang UniversityHangzhou 310027

Enantiomers of four amino alcohols were resolved by ion-pair chromatography with (+)-10-camphorsulphonic acid as chiral counter ion. Studies of the influence of the mobile phase composition, the solute structure and the mobile phase flow-rate on separation are presented. Under the optimized conditions enantiomeric propanolol, norephedrine, metropolol and salbutamol were separated using dichloromethane-1-pentanol (97:3 v/v) as mobile phase on Lichrospher-100-DIOL column.

关键词： Ion-pair chromatography chiral separation amino alcohols (+)-10-camphorsulphonic acid.

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Study of frame-rate up conversion based on H.264

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The Journal of China Universities of Posts and Telecommunications 2007年第1期14卷 106-110页

作者： GAN Zong-liang zhu xiu-chang Province Key Laboratory on Image Processing and Image Communication Nanjing University of Posts and Telecommunications Nanjing 210003 China

In this study, a low complexity frame-rate up conversion method using compressed domain information for H.264 decoder is proposed. In the proposed scheme, the motion vectors （MVs） are estimated using constant acceleration motion model, and the MVs regarded as no credibility are corrected, and the interpolation method is applied on the basis of the macroblock （MB） coded types. Applied to the H.264 decoder, the proposed method provides high quality interpolation frames and an obvious decrease of the block artifacts.

关键词： video post processing H.264 motion compensated frame interpolation (MCFI) frame-rate up conversion (FRUC)

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Origins and transports of the low-salinity coastal water in the southwestern Yellow Sea

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Acta Oceanologica Sinica 2018年第4期37卷 1-11页

作者： zhu ping WU Hui State Key Laboratory of Estuarine and Coastal Research East China Normal University School of Marine Sciences East China Normal University

In the southwestern Yellow Sea there is a low-salinity and turbid coastal water,the Subei Coastal Water（SCW）.The origins of freshwater contents and thus the dissolved terrigenous nutrients in the SCW have been debated for *** this study,we used a well-validated numerical model to quantify the contributions of multiple rivers,i.e.,the Changjiang River in the south and the multiple Subei local rivers（SLRs） in the north,in forming this yearround low-salinity coastal *** is found that the freshwater contents in the SCW is dominated by the Changjiang River south of 33.5°N,by the SLRs north of 34.5°N,and by both sources in 33.5°–34.5°***,the Changjiang River contributes ~70% in the dry season and ~80% in the wet season of the total freshwater contents in the SCW,*** driving the Changjiang River Plume to flow northward is the tidal residual current,which can even overwhelm the wind effects in winter *** residual currents turn offshore near the Old Yellow River Delta（OYRD） by the collision of the two tidal wave systems,which transport the freshwater from both sources into the interior Yellow *** age experiments show that it takes 50–150 d for the Changjiang River Plume to reach the SCW in the spring and summer seasons,thus there is a 2-month lag between the maximum freshwater content in SCW and the peak Changjiang River *** the winter and autumn seasons,the low salinity in inner SCW is the remnant Changjiang River diluted water arrived in the previous seasons.

关键词： Subei Coastal Water origins river plume numerical modeling

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Uptake, Subcellular Distribution, and Chemical Forms of Cadmium in Wild-Type and Mutant Rice

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Pedosphere 2008年第3期18卷 371-377页

作者： HE Jun-Yu zhu Cheng REN Yan-Fang YAN Yu-ping CHENG Chang JIANG De-An SUN Zong-xiu State Key Laboratory of Plant Physiology ＆ Biochemistry College of Life Science Zhejiang University Hangzhou310058 （China） College＇of Agriculture Guizhou University Guizhou 550025 （China） State Key Laboratory of Rice Biology China National Rice Research Institute Hangzhou 310006 （China）

Wild-type （Zhonghua 11） and mutant rice （Oryza sativa L.） plants were used to investigate the effect of cadmium （Cd） application on biomass production, to characterize the influx of Cd from roots to shoots, and to determine the form, content, and subcellular distribution of Cd in the roots, leaf sheaths, and leaves of the rice plants. Seedlings were cultivated in a nutrient solution and were treated with 0.5 mmol L^-1 of Cd^2＋ for 14 d. The sensitivity of rice plants to Cd toxicity was tested by studying the changes in biomass production and by observing the onset of toxicity symptoms in the plants. Both the wild-type and mutant rice plants developed symptoms of Cd stress. In addition, Cd application significantly （P ≤ 0.01） decreased dry matter production of roots, leaf sheaths, and leaves of both types, especially the mutant. The Cd content in roots of the mutant was significantly （P ≤0.05） higher than that of the wild-type rice. However, there was no significant difference in the Cd content of roots, leaf sheaths, and leaves between the wild-type and mutant rice. Most of the Cd was bound to the cell wall of the roots, leaf sheaths, and leaves, and the mutant had greater Cd content in cell organelles than the wild type. The uneven subcellular distribution could be responsible for the Cd sensitivity of the mutant rice. Furthermore, different chemical forms of Cd were found to occur in the roots, leaf sheaths, and leaves of both types of rice plants. Ethanol-, water-, and NaCl-extractable Cd had greater toxicity than the other forms of Cd and induced stunted growth and chlorosis in the plants. The high Cd content of the toxic forms of Cd in the cell organelles could seriously damage the cells and the metabolic processes in mutant rice plants.

关键词： cadmium chemical form rice subcellular distribution uptake

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Evaluating Loss-on-Ignition Method for Determinations of Soil Organic and Inorganic Carbon in Arid Soils of Northwestern China

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Pedosphere 2013年第5期23卷 593-599页

作者： WANG Jia-ping WANG xiu-Jun ZHANG Juan State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences University of Chinese Academy of Sciences Earth System Science Interdisciplinary Center University of Maryland College Park

There is a need for determinations of soil organic carbon (SOC) and inorganic carbon (SIC) due to increasing interest in soil carbon sequestration. Two sets of soil samples were collected separately from the Yanqi Basin of northwest China to evaluate loss-on-ignition (LOI) method for estimating SOC and SIC in arid soils through determining SOC using an element analyzer, a modified Walkley-Black method and a LOI method with combustion at 375℃ for 17 h and determining SIC using a pressure calcimeter method and a LOI procedure estimated by a weight loss between 375 to 800℃. Our results indicated that the Walkley-Black method provided 99%recovery of SOC for the arid soils tested. There were strong linear relationships(r > 0.93, P < 0.001) for both SOC and SIC between the traditional method and the LOI technique. One set of soil samples was used to develop relationships between LOI and SOC(by the Walkley-Black method), and between LOI and SIC(by the pressure calcimeter method), and the other set of soil samples was used to evaluate the derived equations by comparing predicted SOC and SIC with measured values. The mean absolute errors were small for both SOC (1.7 g C kg-1) and SIC(1.22 g C kg-1), demonstrating that the LOI method was reliable and could provide accurate estimates of SOC and SIC for arid soils.

关键词： calcareous soil dry combustion linear regression pressure calcimeter method Walkley-Black method

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Electro-catalytic degradation properties of Ti/SnO_2–Sb electrodes doped with different rare earths

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Rare Metals 2016年第5期35卷 412-418页

作者： Fu-Liang zhu Yan-Shuang Meng xiu-Yang Huang State Key Laboratory of Gansu Advanced Nonferrous Metal Materials Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology

Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of the electrode can be significantly improved by doping rare earth（RE） ions into the oxide coating of Ti/SnO2–Sb electrode. Ti/SnO2–Sb electrodes doped with different RE elements（Ce, Dy, La, and Eu） were prepared by the thermal decomposition method at 550 ℃. Electro-catalytic degradation performances of electrodes doped with different RE elements were evaluated by linear sweep voltammetry（LSV） and Tafel curves. During the electrolysis,the conversion of p-nitrophenol was performed with these electrodes as anodes under galvanostatic control. The structures and morphologies of the surface coating of the electrodes were characterized by scanning electron microscope（SEM）. The results demonstrate that the electro-catalytic degradation performances of Ti/SnO2–Sb electrodes are improved to different levels by doping different RE ions. Improved Ti/SnO2–Sb electrodes by the introduction of different RE have higher oxygen evolution potential, better electro-catalysis ability, better coverage,and longer electrode life.

关键词： Ti/SnO_2–Sb electrode Rare earth doped Thermal decomposition method Catalytic degradation

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Electroacupuncture exerts neuroprotective effects on ischemia/reperfusion injury in JNK knockout mice：the underlying mechanism

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Neural Regeneration Research 2018年第9期13卷 1594-1601页

作者： Chun-Xiao Wu Yi-Hui Feng Lu Yang zhu-Lian Zhan xiu-Hong Xu Xiao-Ying Hu Zhi-Hua zhu Guo-ping Zhou School of Traditional Chinese Medicine Southern Medical University Guangzhou Guangdong Province China Medical College of Acu-Moxi and Rehabilitation Guangzhou University of Chinese Medicine Guangzhou Guangdong Province China Central Hospital of Qingdao Qingdao Shandong Province China Traditional Chinese Medicine-Integrated Hospital the Affiliated Hospital of Southern Medical University Guangzhou Guangdong ProvinceChina Ruikang Hospital Affiliated to Guangxi College of Traditional Chinese Medicine Nanning Guangxi Zhuang Autonomous Region China

Simple regulation of c-Jun N-terminal kinase（JNK） or p38 mitogen-activated protein kinase（MAPK） pathways is not enough to trigger cell ***,activation of the stress activated pathway（JNK/p38 MAPK） together with inhibition of the growth factor activated extracellular signal-regulated kinase（ERK） pathway can promote cell *** hypothesized that inhibition of the JNK or p38 pro-apoptotic pathway and activating the ERK pathway could be the mechanism of anti-apoptosis following cerebral ischemia/reperfusion *** investigate the mechanism of the protective effect of electroacupuncture on cerebral ischemia/reperfusion injury in JNK knockout mice,mouse models of cerebral ischemia/reperfusion injury were established by Longa’s *** was conducted at acupoints Chize（LU5）,Hegu（LI4）,Sanyinjiao（SP6） and Zusanli（ST36） 1.5 hours after ischemia/reperfusion injury for 20 minutes,once a *** neurological function was evaluated using neurological deficit *** expression of phospho-extracellular signal-regulated kinase（p-ERK） and phospho-p38（p-p38） in JNK knockout mice was detected using double-labeling immunofluorescence and western blot *** m RNA expression of ERK and p38 was measured by quantitative real-time polymerase chain *** improved neurological function,increased the immunoreactivity and relative expression of p-ERK and reduced that of p-p38 in the cerebral cortex and hippocampus on the injured *** increased m RNA expression of ERK,but decreased that of p38 in the cerebral cortex and hippocampus on the injured *** conclusion,electroacupuncture upregulated the protective ERK pathway and inhibited the pro-apoptotic p38 pathway,thereby exerting a neuroprotective effect and improving the neurological function in JNK knockout mice.

关键词： nerve regeneration MAPKs signaling pathway cerebral ischemia/reperfusion stress-activated pathway growth factor-activatedpathway electroacupuncture apoptosis

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