检索结果-内蒙古大学图书馆

2009 IEEE International Workshop on Imaging Systems and Techniques, IST 2009

作者： Qiang, Wu Qing, Gao xuwen, li Kebin, Jia College of Electronic and Control Engineering Beijing University of Technology Beijing China College of Life Science and Bio-engineering Beijing University of Technology Beijing China

ISBN: (纸本)9781424434831

This paper studies on the hardware design and implementation of a universal multi-DSP and FPGA image information processor in accordance with the PCI-E and CPCI specifications. The image information processor features two clusters of total four ADSP-TS201 TigerSHARC DSPs from ADI as the kernel processing unit, reconfigurable framework implemented by two Xilinx Virtex-5 FXT FPGA chips. Taking full advantage of the high performance, unprecedented I/O bandwidth of TigerSHARC DSP and Virtex-5 FXT FPGA, the processor can easily meet the huge image processing and computing work. The hardware design of high speed linkport interconnection between TS201 DSPs and FPGA chips is described. © 2009 IEEE.

关键词： Field programmable gate arrays (FPGA)

来源：评论

学校读者我要写书评

暂无评论

Marine sponges of the genus Stelletta as promising drug sources: chemical and biological aspects

引用

Acta Pharmaceutica Sinica B 2019年第2期9卷 237-257页

作者： Qihao Wu Bastien Nay Min Yang Yeke Ni Hong Wang ligong Yao xuwen li State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences College of Pharmaceutical Science Zhejiang University of Technology Laboratoire de Synthèse Organique UMR 7652 CNRS Ecole Polytechnique Université Paris-Saclay

Marine sponges of the genus Stelletta are well known as rich sources of diverse and complex biologically relevant natural products, including alkaloids, terpenoids, peptides, lipids, and steroids. Some of these metabolites, with novel structures and promising biological activities, have attracted a lot of attention from chemists seeking to perform their total synthesis in parallel to intensive biological studies towards new drug leads. In this review, we summarized the distribution of the chemically investigated Stelletta sponges, the isolation, synthesis and biological activities of their secondary metabolites, covering the literature from 1982 to early 2018.

关键词： Marine natural products Stelletta sponge Isolation Total synthesis Biological activity Marine drug leads

来源：评论

学校读者我要写书评

暂无评论

Protective effect of total flavonoids extracted from the leaves of Murraya paniculata (L.) Jack on diabetic nephropathy in rats

引用

FOOD AND CHEMICAL TOXICOLOGY 2014年 64卷 231-237页

作者： Zou, Jingtao Yu, Xiaofeng Qu, Shaochun li, xuwen Jin, Yongri Sui, Dayuan Jilin Univ Dept Pharmacol Sch Pharmaceut Sci Changchun 130021 Peoples R China Jilin Univ Dept Analyt Chem Coll Chem Changchun 130021 Peoples R China

This study was designed to evaluate the effects of total flavonoids extracted from the leaves of Murraya paniculata (L) Jack (TFMP) on diabetic nephropathy. High fat diet and streptozotocin-induced diabetic rats were treated with the TFMP (35 or 70 mg/kg) for 13 weeks. Changes of renal function parameters were examined at the end of administration. Some kidneys were collected for histological and immunohistochemistry studies, the other ones for biochemical parameters analysis. TFMP significantly decreased the levels of serum blood urea nitrogen, serum creatinine, creatinine clearance, interleukin-6, urinary albumin, 24 h-urinary albumin excretion rate, kidney weight to body weight ratio and fasting blood glucose in diabetic rats. Meanwhile, the levels of triglycerides, total and LDL cholesterols in the TFMP treated diabetic rats were lower and the high-density lipoprotein cholesterol level was higher than that in the diabetic rats. TFMP treatment significantly blocked the decrease of superoxide dismutase and glutathione peroxidase and increase of malondialdehyde levels in diabetic rats. Furthermore, the TFMP not only decreased the expression of TGF-beta 1 and CTGF protein, but also reduced diabetes-induced morphological alterations of the kidney. These results suggest that TFMP is a protective agent against renal damage in diabetic nephropathy. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： Murraya paniculata (L.) Jack High fat diet Streptozotocin Renal damage Diabetic nephropathy Rat

来源：评论

学校读者我要写书评

暂无评论

Studies on interaction between flavonoids and bovine serum albumin by spectral methods

引用

JOURNAL OF LUMINESCENCE 2010年第4期130卷 637-644页

作者： Shi, Xiaolei li, xuwen Gui, Mingyu Zhou, Hongyu Yang, Ruijie Zhang, Hanqi Jin, Yongri Jilin Univ Coll Chem Changchun 130012 Peoples R China

The interaction between three kinds of flavonoids and bovine serum albumin (BSA) was investigated by fluorescence and UV-vis absorption spectrometry. The results indicated that flavonoids have strong ability to quench the intrinsic fluorescence of BSA by forming complexes. The binding constants, number of binding sites, thermodynamic parameters and energy transfer mechanisms were also investigated. Conformation change of BSA was observed from Synchronous, three-dimensional fluorescence and circular dichroism spectrum. (C) 2009 Elsevier B.V. All rights reserved.

关键词： Flavonoids Bovine serum albumin Three-dimensional fluorescence spectra Synchronous fluorescence spectra Circular dichroism spectrum

来源：评论

学校读者我要写书评

暂无评论

In-Situ Transformed Ni, S-Codoped CoO from Amorphous Co-Ni Sulfide as an Efficient Electrocatalyst for Hydrogen Evolution in Alkaline Media

引用

ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2019年第14期7卷 12501-12509页

作者： Lu, Wangting li, xuwen Wei, Feng Cheng, Kun li, Wenhui Zhou, Youhua Zheng, Wanquan Pan, Lei Zhang, Geng Jianghan Univ Inst Interdisciplinary Res 8 Sanjiaohu Rd Wuhan 430056 Hubei Peoples R China Jianghan Univ Sch Chem & Environm Engn 8 Sanjiaohu Rd Wuhan 430056 Hubei Peoples R China Univ Paris Saclay Univ Paris Sud CNRS Inst Sci Mol Orsay F-91405 Orsay France Jianghan Univ Sch Life Sci 8 Sanjiaohu Rd Wuhan 430056 Hubei Peoples R China Huazhong Agr Univ Coll Sci Dept Chem 1 Shizishan St Wuhan 430070 Peoples R China

Amorphous materials have recently received much attention as catalysts for electrochemical reactions. However, there are relatively few reports focused on the structure change of amorphous catalysts during the catalysis process, although this is quite important to the identification of active species and in revealing the reaction mechanism. Herein, amorphous Co-Ni sulfide in the form of a nanoplate and nanowire hybrid on the surface of nickel foam is prepared as the electrode for the hydrogen evolution reaction (HER). During the hydrogen evolution process, the amorphous Co-Ni sulfide is in-situ transformed into crystalline Ni, S-co-doped CoO which is actually responsible for the catalysis of HER The transformation process is studied in detail by high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and theoretical calculations. The in-situ formed electrode presents a high activity and durability toward HER in alkaline media. The Ni and S dopants, sulfurization temperature, and electrode substrate are revealed to be important factors that affect the activity. The present work will not only give more insights in the structure evolution of the electrocatalyst during HER but also provides a new strategy to the fabrication of new electrocatalysts.

关键词： Water splitting HER Amorphous material Oxide Doping

来源：评论

学校读者我要写书评

暂无评论

Software design of hardware-in-the-loop simulation system based on rapidio 8

Software design of hardware-in-the-loop simulation system ba...

引用

8th International Conference on Computing and Pattern Recognition, ICCPR 2019

作者： li, xuwen Hu, Jiashun Wu, Xuegang Wu, Qiang Beijing University of Technology College of Life Science and Bioengineering Beijing China

ISBN: (纸本)9781450376570

At present, Rapid IO has been widely used in embedded platforms due to its high transmission efficiency and low transmission delay, making the software of the embedded platform a new speed. Windows system has the advantages of friendly interface, wide user base, easy maintenance and upgrade, etc., which has received extensive attention in the industry, but the real-time performance is poor and it is impossible to directly communicate with the embedded processor directly through Rapid IO, which makes it impossible to become a semi-physical simulation system. Therefore, the TSI721 driver development based on the RTX environment is designed. The internal structure of Rapid IO protocol, RTX real-time subsystem and Tsi721 switch chip is briefly described. Detailed description of the development framework and interface design of the Tsi721Pcie driver, the main process of RTX driver development. Experiments verify that PCIe and RTX drivers are stable, reliable, and capable of completing tasks in real time. © 2019 Association for Computing Machinery.

关键词： Software design

来源：评论

学校读者我要写书评

暂无评论

Matrix solid phase dispersion extraction of ginsenosides in the leaves of Panax ginseng CM Mey

引用

FOOD CHEMISTRY 2011年第3期129卷 1253-1257页

作者： Shi, Xiaolei Jin, Yongri liu, Jingbo Zhou, Hongyu Wei, Wei Zhang, Hanqi li, xuwen Jilin Univ Coll Chem Changchun 130012 Peoples R China Jilin Univ Coll Quartermaster Technol Changchun 130012 Peoples R China

The matrix solid phase dispersion (MSPD) was applied to the extraction of eight kinds of ginsenosides from the leaves of Panax ginseng C.M. Mey. The experimental conditions were examined and optimised. The extracts were analysed by high performance liquid chromatography (HPLC). When the diatomaceous earth was used as dispersant and 75% methanol was used as elution solvent, the highest extraction yields of the eight kinds of ginsenosides were obtained. For comparison, the reflux extraction was applied. The extraction yields obtained by the proposed method were comparable with those obtained by the reflux extraction. The proposed method is convenient, time-saving, and organic solvent minimising. (C) 2011 Published by Elsevier Ltd.

关键词： MSPD Extraction Leaves of Panax ginseng SEM

来源：评论

学校读者我要写书评

暂无评论

Fast sulfurization of nickel foam-supported nickel-cobalt carbonate hydroxide nanowire array at room temperature for hydrogen evolution electrocatalysis

引用

ELECTROCHIMICA ACTA 2019年 318卷 252-261页

作者： Lu, Wangting li, xuwen Wei, Feng Cheng, Kun li, Wenhui Zhou, Youhua Zheng, Wanquan Pan, Lei Zhang, Geng Jianghan Univ Inst Interdisciplinary Res Wuhan 430056 Hubei Peoples R China Jianghan Univ Sch Chem & Environm Engn Wuhan 430056 Hubei Peoples R China Univ Paris Saclay Univ Paris Sud Inst Sci Mol Orsay CNRS F-91405 Orsay France Jianghan Univ Sch Life Sci Wuhan 430056 Hubei Peoples R China Huazhong Agr Univ Coll Sci Dept Chem Wuhan 430070 Hubei Peoples R China

Transition metal sulfide is considered as a kind of promising noble metal-free material for hydrogen evolution reaction (HER). However, most of conventional sulfurization methods require high temperature and/or long reaction time. Herein, a sulfurization strategy at room temperature (25 degrees C) by using Na2S in aqueous solution is applied to sulfurize nickel foam-supported nickel-cobalt carbonate hydroxide nanowire array, during which amorphous sulfide gradually forms on the surface of nanowire and finally replaces the nanowire completely. It is found that the electrode sulfurized for 5 min in which only a thin sulfide layer is formed presents nearly identical catalytic performance for HER with the electrode that is sufficiently sulfurized for 120 min. The electrode sulfurized at 25 degrees C for 5 min only needs an overpotential of 100 mV to achieve hydrogen evolution current at 10 mA cm(-2) in 1 M KOH, and negligible loss of activity is observed after working at a current density of 20 mA cm(-2) for 25 h. The interface between carbonate hydroxide and sulfide is considered to play an important role in the catalysis of HER. The observation in this work can provide new insights into the sulfurization process and the role of sulfide in the process of HER. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： HER Sulfide Amorphous Interface DFT

来源：评论

学校读者我要写书评

暂无评论

Determination of common ginsenosides in Kang'ai injection by aqueous two-phase extraction with deep eutectic solvents and HPLC-UV/DAD

引用

MICROCHEMICAL JOURNAL 2018年 137卷 302-308页

作者： li, Peng Zhao, Pengyun liu, Weijie Jiang, Yifu Wang, Wenjiao Bao, Longyue Jin, Yongri li, xuwen Jilin Univ Coll Chem Changchun 130012 Jilin Peoples R China

In this work, four kinds of deep eutectic solvents (DESs), composed of choline chloride (ChCl) and several alcohols, were synthesized and characterized by H-1 NMR and FT-IR spectra. Based on DES ( ChCl and 1,4-butanediol) and inorganic salt solution (dipotassium phosphate, K2HPO4), aqueous two-phase system (ATPS) coupled with high-performance liquid chromatography has been developed and applied. This method was used for the efficient extraction and determination of eight common ginsenosides (including ginsenoside Rg(1), Re, Rf, Rg(2), Rc, Rb-2 and Rd) in the traditional Chinese medicine injection named Kang'ai injection. To achieve optimum extraction performance, the experimental conditions were optimized, including type and amount of DES and salt, ultrasound time, temperature and pH value. In the dynamic linearity range, experimental results showed satisfactory recoveries of analytes ranging from 92.7-110.8% with the relative standard deviations (RSDs) ranging from 1.2-3.9%. It has been proved that DES-ATPS has great potential for determination of active ingredients in traditional Chinese medicine injection as well as samples in other analytical science field. (C) 2017 Elsevier B.V. All rights reserved.

关键词： Aqueous two-phase system Ginsenosides High-performance liquid chromatography Kang'ai injection

来源：评论

学校读者我要写书评

暂无评论

The exploration of N6-deoxyadenosine methylation in mammalian genomes

引用

Protein & Cell 2021年第10期12卷 756-768页

作者： xuwen li Zijian Zhang Xinlong Luo Jacob Schrier Andrew D.Yang Tao P.Wu Department of Molecular and Human Genetics Baylor College of MedicineHoustonTX 77030USA Medical Scientist Training Program Baylor College of MedicineHoustonTX 77030USA Huffington Center on Aging Baylor College of MedicineHoustonTX 77030USA Dan L Duncan Comprehensive Cancer Center Baylor College of MedicineHoustonTX 77030USA

N^(6)-methyladenine(N^(6)-mA,m^(6)dA,or 6mA),a prevalent DNA modification in prokaryotes,has recently been identified in higher eukaryotes,including *** 6mA has been well-studied in prokaryotes,the function and regulatory mechanism of 6mA in eukaryotes are still poorly *** studies indicate that 6mA can serve as an epigenetic mark and play critical roles in various biological processes,from transposable-element suppression to environmental stress ***,we review the significant advances in methodology for 6mA detection and major progress in understanding the regulation and function of this non-canonical DNA methylation in eukaryotes,predominantly mammals.

关键词： DNA N^(6)-methyladenine(6mA) mammalian DNA modification norvcanonical mammalian DNA methylation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：