检索结果-南通市图书馆

Biodiesel Production from Waste Cooking Oil over Mesoporous SO42./Zr-SBA-15

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2015年第3期28卷 361-369,I0002页

作者： Ji-long Zhang Zhi-jie Lei Xiao-chao Zhang Qi Zhang Qun Yi Rui-feng li College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China College of Mining Engineering Taiyuan University of Technology Taiyuan 030024 China Key Laboratory of Coal Science and Technology and Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan 030024 China

Biodiesel production from waste cooking oils over SO42./Zr-SBA-15 catalyst was successfully carried out and investigated. SO42./Zr-SBA-15 catalyst was prepared by one-step process using anhydrous zirconium nitrate as zirconium resource, and endowed with the strong Lewis acid sites formed by supporting the zirconium species onto the SBA-15 surface. The asprepared SOt2./Zr-SBA-15 showed excellent triglyceride conversion efficiency of 92.3% and fatty acid methyl esters （FAME） yield of 91.7% for the transesterification of waste cooking oil with methanol under the optimized reaction conditions： the methanol/oil molar ratio of 30, the reaction temperature of 160 ℃, the reaction time of 12.h and 10wt% of catalyst. It was noticed that the as-prepared SOa2./Zr-SBA-15 materials with the higher area surface of mesoporous framework and the surface acidity displayed excellent stability and reusability, maintaining high FAME yield of （74±1）% after seven runs of reaction.

关键词： Biodiesel Zr-SBA-15 Solid acid catalyst Transesterification Waste cooking oil

微重力探测在2.0 m以浅采空区的应用——以黄庄煤矿为例

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

山东国土资源 2024年第5期40卷 52-58页

作者：刘红达宋建华林增民王如喜李积涛李超山东省第一地质矿产勘查院山东济南250014 富铁矿勘查开发技术山东省工程研究中心山东济南250014 中国地质大学(武汉) 湖北武汉430074

济南市钢城区拟建设一个市民文体综合活动中心,建设用地处于原黄庄煤矿所在地,采煤历史悠久,开采资料记录不详实,需要进行采空区探测。建设场地处于城区,人文电磁干扰较严重。根据密度差异原理提出使用微重力探测技术,本文建立了研究区... 详细信息

济南市钢城区拟建设一个市民文体综合活动中心,建设用地处于原黄庄煤矿所在地,采煤历史悠久,开采资料记录不详实,需要进行采空区探测。建设场地处于城区,人文电磁干扰较严重。根据密度差异原理提出使用微重力探测技术,本文建立了研究区的采空区模型,正演计算了地面重力异常响应。将实测数据进行了垂向一阶导数、趋势面分析法处理,并与瞬变电磁测量结果进行对比分析,综合推断了采空区范围。经钻孔验证存在空洞,说明微重力法在2.0 m以浅的采空区探测是可行的。

关键词：微重力采空区瞬变电磁法

Structural Evolution and Hydrocarbon Potential of the Upper Paleozoic Northern Ordos Basin, North China

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2015年第5期89卷 1636-1648页

作者： YANG Minghui li liang ZHOU Jin JIA Huichong SUN Xiao GONG Ting DING chao State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum College of Geosciences China University of Petroleum North China Company SINOPEC No.3 Brigade of Jiangsu Geology & Mineral Resources Bureau China Railway Resources Exploration Co. LTD Henan Earthquake Administration

The hydrocarbon potential of the Hangjinqi area in the northern Ordos Basin is not well known, compared to the other areas of the basin, despite its substantial petroleum *** of a depth-converted seismic profile across the Hangjinqi Fault Zone（HFZ） in the eastern Hangjinqi area shows one compression that created anticlinal structures in the Late Triassic, and two extensions in ~Middle Jurassic and Late Early Cretaceous, which were interrupted by inversions in the Late Jurassic–Early Early Cretaceous and Late Cretaceous, *** generation at the well locations in the Central Ordos Basin（COB） began in the Late *** modeling of Well Zhao-4 suggests that hydrocarbon generation from the Late Carboniferous–Early Permian coal measures of the northern Shanbei Slope peaked in the Early Cretaceous, predating the inversion in the Late *** source rocks in the Shanbei Slope passed the main gas-migration phase except for the Hangjinqi area source rocks（Well Jin-48）.Hydrocarbons generated from the COB are likely to have migrated northward toward the anticlinal structures and traps along the HFZ because the basin-fill strata are dipping *** that continued during the extensional phase（Late Early Cretaceous） of the Hangjinqi area probably acted as conduits for the migration of ***, the anticlinal structures and associated traps to the north of the HFZ might have trapped hydrocarbons that were charged from the Late Carboniferous–Early Permian coal measures in the COB since the Middle Jurassic.

关键词： structural geology hydrocarbons Upper Paleozoic Hangjinqi northern Ordos Basin North China

Ultra-broadband,fast,and polarization-sensitive photoresponse of low-symmetry 2. NdSb_(2.

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第6期15卷 5469-5475页

作者： Gang li Hanlin Zhang Yong li Shiqi Yin Xucai Kan Wensen Wei Haifeng Du Binghui Ge chao An Mingliang Tian Feng Yan Sanjun Yang Tianyou Zhai liang li Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Engineering Technology Research Center of Magnetic Materials School of Physics and Materials ScienceAnhui UniversityHefei 230601China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory of the Chinese Academy of ScienceHefei 230031China Department of Applied Physics The Hong Kong Polytechnic UniversityKowloonHong Kong 999077China State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China

Broadband photodetectors with polarization-sensitive ability have received extraordinary attention for modern optoelectronic *** photodetectors should possess high responsivity,fast response,and good stability,which are rare to meet at the same time in one low-symmetric two-dimentional(2.)*** this work,neodymium diantimonides(RSb_(2.),a member of light rare-earth diantimonides RSb_(2.(R=La–Nd,Sm)with low-symmetry structure,is introduced as a fascinating highly anisotropic 2. material for broadband detection(532.nm to 4μm).The photodetector exhibits a responsivity of 0.49 mA·W^(−1)with 15μs response time at 532.nm and highly stable performance under ambient conditions over 8 ***,we identify the polarization-sensitive photoresponse of the detector and demonstrate a high anisotropic factor~*** addition,strong inplane anisotropy is revealed by anisotropic phonon response and the photodetection mechanism is investigated by scanning photocurrent microscopy *** pioneer work on RSb_(2.paves the way for further exploration of 2. RSb_(2.for high performance polarized photodetectors with fast photothermoelectric response.

关键词： ultra-broadband fast response polarization-sensitive photodetector RSb_(2.

Blockade of transient receptor potential cation channel subfamily V member 1 promotes regeneration after sciatic nerve injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2015年第8期10卷 1324-1331页

作者： Fei Ren Hong Zhang chao Qi Mei-ling Gao Hong Wang Xia-qing li Department of Pathophysiology School of Basic Medical Sciences Shanxi Medical University

The transient receptor potential cation channel subfamily V member 1（TRPV1） provides the sensation of pain（nociception）. However, it remains unknown whether TRPV1 is activated after peripheral nerve injury, or whether activation of TRPV1 affects neural regeneration. In the present study, we established rat models of unilateral sciatic nerve crush injury, with or without pretreatment with AMG517（300 mg/kg）, a TRPV1 antagonist, injected subcutaneously into the ipsilateral paw 60 minutes before injury. At 1 and 2.weeks after injury, we performed immunofluorescence staining of the sciatic nerve at the center of injury, at 0.3 cm proximal and distal to the injury site, and in the dorsal root ganglia. Our results showed that Wallerian degeneration occurred distal to the injury site, and neurite outgrowth and Schwann cell regeneration occurred proximal to the injury. The number of regenerating myelinated and unmyelinated nerve clusters was greater in the AMG517-pretreated rats than in the vehicle-treated group, most notably 2.weeks after injury. TRPV1 expression in the injured sciatic nerve and ipsilateral dorsal root ganglia was markedly greater than on the contralateral side. Pretreatment with AMG517 blocked this effect. These data indicate that TRPV1 is activated or overexpressed after sciatic nerve crush injury, and that blockade of TRPV1 may accelerate regeneration of the injured sciatic nerve.

关键词： nerve regeneration peripheral nerve regeneration transient receptor potential cation channel subfamily V member 1 capsaicin receptor vanilloid receptor TRPV1 antagonist nociceptor nerve crush injury Wallerian degeneration axon NSFC grant neurites neural regeneration

Advances in Radical Oxidative C--H Alkylation of N-Heteroarenes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2017年第3期35卷 271-279页

作者： Jun-Rong Zhang li Xu Yan-Yan liao Jian-chao Deng Ri-Yuan Tang Department of Applied Chemistry College of Materials and Energy South China Agricultural University Guangzhou Guangdong 510642 China

This review summarizes recent development in C—H alkylation of N-heteroarenes via the radical oxidative coupling process. A variety of alkyl radical sources (including alkanes, ethers, alcohols, carboxylic acids, org... 详细信息

关键词： radical oxidative coupling C—H functionalization alkylation heteroarenes

An Integrated Cyber-Physical Simulation Environment for Smart Grid Applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2014年第2期19卷 133-143页

作者： Yuxin Wan Junwei Cao Shuqing Zhang Guoyu Tu chao Lu Xingtao Xu Keqin li the Department of Automation Research Institute of Information TechnologyTsinghua National Laboratory for Information Science and TechnologyTsinghua University the Department of Electrical Engineering Tsinghua University State Grid Jiangsu Electric Power Company Department of Computer Science State University of New York New Paltz

The concept of Cyber-Physical Systems （CPSs）, which combine computation, networking, and physical processes, is considered to be beneficial to smart grid applications. This study presents an integrated simulation environment to provide a unified platform for the investigation of smart grid applications involving power grid monitoring, communication, and control. In contrast to the existing approaches, this environment allows the network simulator to operate independently, importing its results to the power system simulation. This resolves conflicts between discrete event simulation and continuous simulation. In addition, several data compensation methods are proposed and investigated under different network delay conditions. A case study of wide-area monitoring and control is provided, and the efficiency of the proposed simulation framework has been evaluated based on the experimental results.

关键词： control cyber-physical system simulation smart grid wide-area monitoring

A New Distributed Measurement of Birefringence Vectors by P-OTDR Assisted by a High Speed Polarization Analyzer

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第9期28卷 162-165页

作者： SHANG chao WU Chong-Qing li Zheng-Yong YANG Shuang-Shou Key Lab of Luminescence and Optical Information Technology(Ministry of Education) Beijing Jiaotong UniversityBeijing 100044

A new polarimetric optical time domain reflectometry(P-OTDR)measurement device assisted by a high speed polarization analyzer is designed and a new algorithm,which can be used to accurately measure the birefringence vector,is *** this method,only one measurement is required and the result is insensitive to the input state of *** 1-km single mode fiber(SMF)is measured and the distribution of the local birefringence vector along the SMF is obtained with a resolution of 2.cm.

关键词： OTDR polarization fiber

TIR/BB-loop mimetic AS-1 protects vascular endothelial cells from injury induced by hypoxia/reoxygenation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Journal of Biomedical Research 2020年第5期34卷 343-350,I0001页

作者： Zhijia Zhang Yuxing Hou Jiantao li chao Tang linli Que Qian Tan Yuehua li Department of Pathophysiology Nanjing Medical UniversityNanjingJiangsu 211166China Department of Plasticsurgery Drum Tower HospitalNanjingJiangsu 211100China.

Morphological and functional abnormalities of vascular endothelial cells(VECs) are risk factors of ischemiareperfusion in skin *** pathway mediated by interleukin-1 receptor(IL-1 R) is essential to hypoxia/reoxygenation(H/R) injury of *** the TIR/BB-loop mimetic(AS-1) disrupts the interaction between IL-1 R and myeloid differentiation primary-response protein 88(MyD88),its role in the VECs dysfunction under H/R is *** this study,we first showed that there was an infiltration of inflammatory cells and the apoptosis of VECs by using a skin flap section from patients who received flap *** then showed that the H/R treatment induced apoptosis and loss of cell migration of endothelial cell line H92. were attenuated by ***,our data suggested that AS-1 inhibits the interaction between IL-1 R and MyD88,and subsequent phosphorylation of IκB and p38 pathway,as well as the nuclear localization of NF-κB subunit p65/***,this study indicated that the protective role of AS-1 in H/R induced cellular injury may be due to the AS-1 mediated down-regulation of IL-1 R signaling pathway.

关键词： AS-1 vascular endothelial cells hypoxia/reoxygenation IL-1R NF-κB MAPK