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A new type of super hydrophilic SiO2 aerogel for use as a potential NH3 sorbent

Current Nanoscience 2015年第1期11卷 120-128页

作者： lin, Benlan Ruan, Juqi Cui, Sheng Shen, Xiaodong Yu, shuwen College of Materials Science and Engineering State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech University Nanjing210009 China Suqian Advanced Materials Institute of Nanjing Tech University Suqian223800 China

A super hydrophilic SiO2 aerogel (SHSA) was prepared using the sol-gel method and CO2 supercritical drying technology, yielding a specific surface area of 680.08 m2/g and a total pore volume of 3.95 cm3/g. The hydrophilic property of the SHSA was investigated and showed a maximum water adsorption capacity (qm) of 7.79 ml/g. NH3 adsorption tests were conducted and were compared with the results for pure SiO2 aerogel (PSA) under non-water vapor and water vapor treating conditions. The effect of water vapor on SHSA was found to be larger than its effect on PSA. A physical chemical adsorption process of NH3 appeared in the presence of water vapor on the SHSA surface, giving a maximum adsorption capacity (Qm) of 193.66 mg/g. The regenerability of SHSA was also investigated, and the loss percentage of Qm was found to be 22.28% over 10-cycle adsorption tests. The results indicate that SHSA is a promising candidate for use as an NH3 sorbent. © 2015 Bentham Science Publishers.

关键词： Aerogels

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Triboelectric Nanogenerator for Sustainable Wastewater Treatment via a Self-Powered Electrochemical Process

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ADVANCED ENERGY MATERIALS 2016年第8期6卷

作者： Chen, shuwen Wang, Ning Ma, Long Li, Tao Willander, Magnus Jie, Yang Cao, Xia Wang, Zhong lin Chinese Acad Sci Beijing Inst Nanoenergy & Nanosyst Natl Ctr Nanosci & Technol Beijing 100083 Peoples R China Beihang Univ Sch Chem & Environm Beijing 100083 Peoples R China Wuhan Mech Technol Coll Wuhan 430075 Peoples R China Univ Sci & Technol Beijing Sch Chem & Biol Engn Beijing 100069 Peoples R China Georgia Inst Technol Sch Mat Sci & Engn Atlanta GA 30332 USA

By harvesting the flowing kinetic energy of water using a rotating triboelectric nanogenerator (R-TENG), this study demonstrates a self-powered wastewater treatment system that simultaneously removes rhodamine B (RhB) and copper ions through an advanced electrochemical unit. With the electricity generated by R-TENG, the removal efficiency (RE) of RhB can reach the vicinity of 100% within just 15 min when the initial concentration of RhB is around 100 ppm at optimized conditions. The removal efficiency of copper ions can reach 97.3% after 3 h within an initial concentration of 150 ppm at an optimized condition. Importantly, a better performance and higher treating efficiency are found by using the pulsed output of R-TENG than those using direct current (DC) supply for pollutant removal when consuming equal amount of energy. The recovered copper layer on the cathode through R-TENG is much denser, more uniform, and with smaller grain size (d = 20 nm) than those produced by DC process, which also hints at very promising applications of the R-TENG in electroplating industry. In light of the merits such as easy portability, low cost, and effectiveness, this R-TENG-based self-powered electrochemical system holds great potential in wastewater treatment and electroplating industry.

关键词： self‐powered sustainable triboelectric nanogenerators wastewater treatment

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Primary effects of extracellular enzyme activity and microbial community on carbon and nitrogen mineralization in estuarine and tidal wetlands

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APPLIED MICROBIOLOGY AND BIOTECHNOLOGY 2015年第6期99卷 2895-2909页

作者： Li, Xiaofei Hou, Lijun Liu, Min lin, Xianbiao Li, Ye Li, shuwen E China Normal Univ Coll Geog Sci Shanghai 200062 Peoples R China E China Normal Univ State Key Lab Estuarine & Coastal Res Shanghai 200062 Peoples R China

Estuarine and tidal wetlands with high primary productivity and biological activity play a crucial role in coastal nutrient dynamics. Here, to better reveal the effects of extracellular enzymes and microbial community on carbon (C) and nitrogen (N) mineralization, the incubation experiments with different C and N addition patterns to the tidal sediments of the Yangtze Estuary (China) were conducted. The results suggested a significant increase in cumulative CO2 effluxes in the C and CN treatment experiments, while no significant difference in cumulative CO2 effluxes between the N treatment and control (CK) experiments was observed. In addition, the nutrient addition patterns had a great influence on dissolve organic C and N levels, but a small effect on microbial biomass C and N. Microbial community composition and microbial activity were found to be positively correlated with organic C (OC) and the molar ratio of C to N (C/N). Partial correlation analysis, controlling for C/N, supported direct effects of OC on the activity of carbon-cycling extracellular enzymes (cellulase and polyphenol oxidase), while C/N exhibited negatively correlations with urease and Gram-positive bacteria to Gram-negative bacteria (G+/G-). Strong relationships were found between CO2 efflux and mineral nitrogen with the activity of specific enzymes (sucrase, cellulase, and polyphenol oxidase) and abundances of Gram-negative bacteria, arbuscular mycorrhizal fungi, and fungi, suggesting the significant influences of microbial community and enzyme activity on C and N mineralization in the estuarine and tidal wetlands. Furthermore, this study could highlight the need to explore effects of nutrient supply on microbial communities and enzyme activity changes associated with the C and N mineralization in these wetlands induced by the climate change.

关键词： Extracellular enzyme activity Microbial community composition Phospholipid fatty acid (PLFA) C and N mineralization Estuarine and tidal wetlands Yangtze estuary

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基于多端差动的风电场集电线路保护新原理

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电网与清洁能源 2016年第9期32卷 102-106页

作者：黄景光郑淑文林湘宁三峡大学电气与新能源学院湖北宜昌443002 新能源微电网湖北省协同创新中心(三峡大学) 湖北宜昌443002 华中科技大学电气与电子学院湖北武汉430074

分析了风电场故障对集电线路电流保护及距离保护的影响,提出了多端差动的单元式保护与风电场多段保护,并通过PSCAD/EMTDC进行了仿真,验证了多端差动保护动作的正确性,得到多端差动保护提高了风电场集电线路的保护灵敏度与可靠性,具有较... 详细信息

分析了风电场故障对集电线路电流保护及距离保护的影响,提出了多端差动的单元式保护与风电场多段保护,并通过PSCAD/EMTDC进行了仿真,验证了多端差动保护动作的正确性,得到多端差动保护提高了风电场集电线路的保护灵敏度与可靠性,具有较高的准确度和灵敏度。

关键词：风电场集电线路多端差动多段保护 PSCAD/ EMTDC仿真

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Crosstalk between adipose-derived stem cells and chondrocytes:when growth factors matter

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Bone Research 2015年第4期3卷 216-225页

作者： Juan Zhong Bin Guo Jing Xie shuwen Deng Na Fu Shiyu lin Guo Li Yunfeng lin Xiaoxiao Cai State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan University Institute of Stomatology General Hospital of Chinese PLA

Adipose-derived stem cells（ASCs）and mesenchymal stem cells are promising for tissue repair because of their multilineage differentiation *** previous data confirmed that the implantation of mixed ASCs and chondrocytes into cartilage defects induced desirable in vivo healing ***,the paracrine action of ASCs on chondrocytes needs to be further *** this study,we established a co-culture system to achieve cell-to-cell and cell-to-tissue crosstalk and explored the soluble growth factors in both ASCs and chondrocytes supplemented with 1%fetal bovine serum to mimic the physiological *** ASCs,we screened for growth factors by semi-quantitative PCR and quantitative real-time PCR and found that the expression of bone morphogenetic protein 2（BMP-2）,vascular endothelial growth factor B（VEGFB）,hypoxia inducible factor-1α（HIF-1α）,fibroblast growth factor-2（FGF-2）,and transforming growth factor-β1 significantly increased after co-culture in comparison with *** chondrocytes,VEGFA was significantly enhanced after ***,the expression of collagen II and aggrecan was significantly down-regulated in the co-culture group compared with the mono-culture ***,among all the growth factors screened,we found that the BMP family members BMP-2,BMP-4,and BMP-5 were down-regulated and that VEGFB,HIF-1α,FGF-2,and PDGF were significantly decreased after *** results suggest that crosstalk between ASCs and chondrocytes is a pathway through the regulated growth factors that might have potential in cartilage repair and regeneration and could be useful for tissue engineering.

关键词： crosstalk cartilage adipose repair Forward physiological morphogenetic elucidated fetal mimic

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Apabetalone, a BET bromodomain inhibitor specific for second bromodomains reactivates latent HIV-1 by activating P-TEFb and NF-κB

Apabetalone, a BET bromodomain inhibitor specific for second...

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2016年全国抗炎免疫药理学术会议

作者： Xuanxuan Zhang Ruxia Ren Taizhen Liang Chunyan Wang Xinghua Tan lin Li shuwen Liu State Key Laboratory of Organ Failure Research Guangdong Provincial Key Laboratory of New Drug Screening School of Pharmaceutical Sciences Southern Medical University Guangzhou 510515 P.R.China Center for Clinical Laboratory Nanfang Hospital Southern Medical University Guangzhou510515 P.R.China Department of infectious disease Guangzhou NO.8 People''s Hospital Guangzhou510060 P. R. China

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Gene profile of soluble growth factors involved in angiogenesis, in an adipose-derived stromal cell/endothelial cell co-culture, 3D gel model

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CELL PROLIFERATION 2015年第4期48卷 405-412页

作者： Cun, Xiangzhu Xie, Jing lin, Shiyu Fu, Na Deng, shuwen Xie, Qiang Zhong, Juan lin, Yunfeng Sichuan Univ West China Hosp Stomatol State Key Lab Oral Dis Chengdu 610041 Peoples R China

Objectives: The aim of this study was to investigate gene expressions of growth factors for angiogenesis, in a three-dimensional (3D) gel populated with adipose-derived stromal cells (ASCs) and endothelial cells (ECs) in co-culture. Materials and methods: The 3D gel, mixed with green fluorescent protein (GFP)-positive ASCs and DsRed-Express-positive ECs, 1:1 ratio, was established in vitro. The phenomenon of angiogenesis was observed using confocal microscopy. To detect gene expressions for growth factor proteins in both ASCs and ECs, transwell co-culture was used, and cell lysate samples were collected at 1, 3, 5 and 7 days. Semi-quantitative polymerase chain reaction (PCR) was conducted to quantify mRNA expressions of the growth factors. Results: Angiogenesis was first observed in the gels by 7 days post-implantation. Over this time in ECs, genes coding for VEGFA/B, IGF-1, HIF-1 alpha, FGF-1/-2 and BMP-5/-7 significantly increased. Meanwhile in ASCs, genes coding for VEGFA/B, IGF-1, HIF-1 alpha, FGF-1/-2 and BMP-6 also were significantly enhanced. In particular, increased amounts of IGF-1 and HIF-1 alpha in both ECs and ASCs were prominent relative to other factors. Conclusions: Contact co-culture with ASCs and ECs at 1:1 ratio, in the 3D gel promoted angiogenesis;non-contact co-culture further confirmed gene expressions for growth factors, VEGFA/B, IGF-1, HIF-1 alpha and FGF-1/-2 in both ASCs and ECs;BMP-5/-7 in ECs and BMP-6 in ASCs were also confirmed. This establishment of growth factor expression seemed to be responsible for enhancement of angiogenesis. This indicates that these factors could be utilized as targets for engineered angiogenesis.

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P34HB film promotes cell adhesion, in vitro proliferation, and in vivo cartilage repair

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RSC ADVANCES 2015年第28期5卷 21572-21579页

作者： Fu, Na Xie, Jing Li, Guo Shao, Xiaoru Shi, Sirong lin, Shiyu Deng, shuwen Sun, Ke lin, Yunfeng Sichuan Univ West China Hosp Stomatol State Key Lab Oral Dis Chengdu 610041 Peoples R China

The management of chondral defects is a challenging topic of current interest for scientists and surgeons, which has a crucial impact on human cost. Even after several centuries after its first observation, this problem has still not found a satisfactory and definitive answer. Cartilage tissue engineering, which involves novel natural scaffolds, has emerged as a promising strategy for cartilage regeneration and repair. In this study, bio-plasticpoly-3-hydroxybutyrate-4-hydroxybutyrate (P34HB) film was first fabricated. The characteristics of P34HB film were tested using SEM and AFM. Cell morphologies on P34HB film were obtained using SEM and fluorescence microscopy after cell seeding. The tests of cell adhesion and proliferation on P34HB film were conducted using MTT and CCK-8 assays, respectively. Furthermore, full cartilage defects in rats were created and P34HB films were implanted to evaluate their healing effects within 8 weeks. It was found that P34HB film, as a biomaterial implant, possessed good in vitro properties for cell adhesion, migration, and proliferation. Importantly, in the in vivo experiment, P34HB film exhibited desirable healing outcomes. These results demonstrated that P34HB film was a good scaffold for cartilage tissue engineering for improving cell proliferation and adhesion.

关键词： Cell adhesion

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Analysis of moire minimization in color LED flat-panel display

Analysis of moire minimization in color LED flat-panel displ...

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International Conference on Optical Instruments and Technology - Optoelectronic Measurement Technology and Systems

作者： lin, Kai Liao, Ningfang Zhao, Dazun Dong, shuwen Li, Yasheng Beijing Inst Technol Sch Optoelect Beijing 100081 Peoples R China

ISBN: (纸本)9781628417999

Moire pattern can be readily observed in the case of superimposing two periodic structures. Recently, moire pattern, which degrades the quality of an image, become unavoidable in many LED display and three-dimensional displays, which consist of regular structures. Therefore, a model of moire which fit the character of human vision is important to solve the problem of image quality degradation. In this paper, we modified the the model of moire which proposed by Amidror to evaluate the color moire fringes, which consider the property of human vision system of contrast sensitivity. From the modified model we conclude that moire minimization could have two lattice form an certain angle. The experimental results show that moire pattern are vivid when the angle is 0 degrees, 15 degrees, 20 degrees and 45 degrees. However, the spatial frequency of moire in 10 degrees, 25 degrees, 30 degrees and 35 degrees are fine in spatial domain. It is also reveal that changing angle is simple and effective in alleviating remarkably moire pattern.

关键词： moire model contrast sensitivity minimization LED

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东天山-北山Cu-Ni-Au-Pb-Zn成矿带主要成矿地质特征及潜力分析

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地质学报 2016年第7期90卷 1392-1412页

作者：丁建华邢树文肖克炎马玉波林健宸邓刚国土资源部成矿作用与资源评价重点实验室中国地质科学院矿产资源研究所北京100037 北京理工大学北京100081 新疆地矿局第六地质大队新疆哈密839000

文章通过潜力评价成果汇总和综合分析,结合找矿新理论和该区找矿新进展,重新划定(修定)了东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带的边界。东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带位于西伯利亚板块和塔里木板块之间,在漫长的地质构造演化过... 详细信息

文章通过潜力评价成果汇总和综合分析,结合找矿新理论和该区找矿新进展,重新划定(修定)了东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带的边界。东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带位于西伯利亚板块和塔里木板块之间,在漫长的地质构造演化过程中经历了多次裂解、拼合、造山等构造运动,相应地发生过多期、多阶段的成矿作用,致使此带形成了众多不同矿种、不同类型的矿床,是矿产勘查突破的有利区带。作者从研究区构造演化历史出发,分析了该带区域成矿地质背景,结合带内最新的找矿进展,修订了东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带的成矿谱系,深化了对本成矿带的成矿规律认识;新一轮矿产资源潜力评价证实,带内仍然具有极大的资源潜力,在此基础上,在本带划分了19个远景区,其中9个为重点远景区,10个为一般远景区;提出了带内可能发现新矿床类型(如:砂岩型铀矿、斑岩型金矿等)和新矿种(如稀有稀散金属等);建议本带下一步勘查部署的主攻矿种为Ni、Cu、Mo、Au、W,兼顾Pb、Zn、Ag、Fe和Mn;建议本带主攻类型为基性-超基性岩型镍铜矿、斑岩型铜(钼、金)矿、破碎蚀变岩型金矿、碳酸盐岩-细碎屑岩型铅锌银多金属矿、海相火山岩型铁矿、矽卡岩型银矿以及沉积型锰矿等。该项工作对指导本成矿带下一步矿产勘查部署工作有一定指导意义。

关键词：东天山北山成矿地质特征潜力分析成矿远景区划

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