检索结果-南通市图书馆

Purification and characterization of a novel antifungal protein from Bacillus subtilis strain B29

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第4期10卷 264-272页

作者： Jing LI Qian YANG Li-hua zhao Shu-mei ZHANG yu-xia WANG xiao-yu zhao Department of Life Science and Engineering Harbin Institute of Technology Harbin 150001 China Institute of Microbiology of Heilongjiang Academy of Sciences Harbin 150010 China Heilongjiang University Press Harbin 150040 China

An antifungal protein was isolated from a culture of Bacillus subtilis strain B29. The isolation procedure comprised ion exchange chromatography on diethylaminoethyl （DEAE）-52 cellulose and gel filtration chromatography on Bio-Gel P-100. The protein was absorbed on DEAE-cellulose and Bio-Gel P-100. The purified antifungal fraction was designated as B29I, with a molecular mass of 42.3 kDa by sodium dodecyl sulfate-polyacrylamide gel electrophoresis （SDS-PAGE）, pl value 5.69 by isoelectric focusing （IEF）-PAGE, and 97.81% purity by high performance liquid chromatography （HPLC）. B291 exhibited inhibitory activity on mycelial growth in Fusarium oxysporum, Rhizoctonia solani, Fusarium moniliforme, and Sclerotinia sclerotiorum. The 50% inhibitory concentrations （IC50） of its antifungal activity toward Fusarium oxysporum and Rhizoctonia solani were 45 and 112 μmol/L, respectively. B29I also demonstrated an inhibitory effect on conidial spore germination of Fusariurn oxysporum and suppression of germ-tube elongation, and induced distortion, tumescence, and rupture of a portion of the germinated spores.

关键词： Bacillus subtilis Antifungal protein Purification

Current status quo of ICU low-grade nurse training and management

在线全文

学校读者我要写书评

暂无评论

Frontiers of Nursing 2020年第2期7卷 97-101页

作者： yu-Biao Gai Li zhao xiao-Jing Guo Ya-Jie yu yu-xiao zhao ICU Affiliated Hospital of Qingdao UniversityQingdaoShandong 266000China Outpatient Service Affiliated Hospital of Qingdao UniversityQingdaoShandong 266000China Obstetrics Department Affiliated Hospital of Qingdao UniversityQingdaoShandong 266000China

Intensive care unit(ICU)needs professional nursing staff with high professionalism to ensure the quality of nursing work and ensure patient's ***,low-age nurses play an important role in the ICU care *** this study the authors reviewed the relevant literature,summarized the basic characteristics and training methods of ICU low-grade nurses,and analyzed the insecure factors and management strategies of ICU low-grade nurses.

关键词： ICU low-grade nurse training management status

Investigation of Spontaneous Condensation of an Amino Acid Based Amphiphile on Cast Film by in situ Transmission FT-IR Spectroscopy

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第12期16卷 1637-1640页

作者： Hai Yan WANG Yan Mei LI Yi xiao yu Fen zhao The Key Laboratory of Bioorganic Phosphorus Chemistry ＆ Chemical Biology （Ministry of Education） Department of Chemistry Tsinghua University Beijing 100084

The spontaneous condensation of the amphiphilic N-（O,O-dihexadecyl）phosphorylalanine on the cast film was observed by in situ investigation of transmission infrared spectroscopy The particular orientation and ordered packing of the monomers within the multilayers of the cast film is concluded to attribute to the spontaneous condensation between the monomers.

关键词： Amphiphile cast film condensation FT-IR N-(O O-dihexadecyl)phosphoryl alanine

Analytical Design of Fractional Order Proportional Integral Derivative Controller and Fuzzy Proportional Integral Derivative Controller for High Order System

在线全文

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2013年第4期20卷 21-25页

作者： Chun-Yang Wang Tong Yi xiao-yu zhao Yao-Wu Shi Dept.of Electronic and Information Engineering Changchun University of Science and Technology Dept.of Communication Engineering Jilin University

In this paper,three tuning methods of the integer order proportional integral derivative(IOPID)controller,the fuzzy proportional integral derivative(FPID)controller and the fractional order proportional integral derivative(FOPID)controller for high order system are presented *** IOPID controller and FOPID controller designed by the two tuning methods can satisfy all the three specifications proposed,which can guarantee the desired control performance and the robustness of the high order system to the loop gain *** the simulation results,the three controllers meet the dynamic performance requirements of high order ***,the FOPID controller,with the shortest overshoot and adjustment time,outperforms the IOPID controller and the FPID controller for the high order system.

关键词： IOPID controller FPID controller FOPID controller High order system

Synthesis and applications of low dielectric polyimide

在线全文

学校读者我要写书评

暂无评论

Resources Chemicals and Materials 2023年第1期2卷 49-62页

作者： yu Liu xiao-yu zhao Ya-Guang Sun Wen-Ze Li xiao-Sa Zhang Jian Luan College of Science Shenyang University of Chemical TechnologyShenyang110142P R China College of Sciences Northeastern UniversityShenyang100819P R China

With the advent of the 5 G era,advanced packaging applications such as wafer-level fan-out packaging have emerged thanks to efforts to reduce signal loss and increase signal transmission *** one of the key materials employed in telecommunication devices,the interlayer dielectric material directly affects signal transmission and device *** them,polyimide(PI)has become an important interlayer dielectric material because of its excellent comprehensive ***,in order to meet the needs high-frequency and high-speed circuits for 5 G networks,it will be necessary to further reduce the dielectric constant and dielectric loss of *** is widely used as a flexible dielectric material due to its excellent electrical insulation properties(dielectric constant≈3.0-4.0,dielectric loss≈0.02),mechanical properties,and thermal ***,further reduction in the dielectric constant will be needed in order for PI-based materials to better meet the current high integration development needs of the microelectronics *** article starts from strategies to prepare low dielectric PI that have been developed in the last decade,based on a more systematic and inductive analysis,and prospects the development potential of low dielectric PI.

关键词： Polyimide Low dielectric constant Nanocomposite materials Polyimide films

Superhydrophilic nickel hydroxide ultrathin nanosheets enable high-performance asymmetric supercapacitors

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第1期43卷 138-147页

作者： Yi-Ran Wang Fei Zhang Jian-Min Gu xiao-yu zhao Ran zhao Xing Wang Tian-Hui Wu Jing Wang Ji-Dong Wang De-Song Wang State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryYanshan UniversityQinhuangdao 066004China Department of Food and Pharmaceutical Engineering Suihua UniversitySuihua 152000China School of Chemical Science and Engineering Tongji UniversityShanghai 200092China School of Sciences Hebei University of Science and TechnologyShijiazhuang 050018China

Superhydrophilic surfaces have been applied for supercapacitor;however,during energy storage reaction,how the wettability affects the process of electrochemical reaction specifically is still ***,we demonstrate superhydrophilic surface for promotion of electrochemical reactions by liquid affinity and further explain the mechanism,where the transition of the wettability state caused by the change in surface free energy is the main reason for the obvious increase in specific *** citric acid assistance strategy,an intrinsically hydrophobic Ni(OH)_(2)thick nanosheets(HNHTNs,16 nm)can be transitioned into superhydrophilic Ni(OH)_(2)ultrathin nanosheets(SNHUNs,6.8 nm),where the water contact angle was 0°and the surface free energy increased from 8.6to 65.8 mN·m^(-1),implying *** with HNHTNs,the specific capacitance of SNHUNs is doubled:from 1230 F·g^(-1)(HNHTNs)to 2350 F·g^(-1)(2A·g^(-1))and,even at 20 A·g^(-1),from 833 F·g^(-1)(HNHTNs)to 1670 F·g^(-1).The asymmetric capacitors assembled by SNHUNs and activated carbon show 52.44 Wh·kg^(-1)at 160W·kg^(-1)and excellent stability with~90%retention after5000 cycles(~80%retention after 9500 cycles).The promotion of electrochemical performances is ascribed to the change of surface wettability caused by surface free energy,which greatly increase affinity of electrode to the surrounding liquid environment to reduce the interface resistance and optimize the electron transport path.

关键词： Asymmetric supercapacitor Superhydrophilic interface Transition metal hydroxides Ultrathin nanosheets High specific capacitance

Emerging roles of non-coding RNAs in colorectal cancer oxaliplatin resistance and liquid biopsy potential

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2023年第1期29卷 1-18页

作者： Zheng-Dong Luo Yi-Feng Wang yu-xiao zhao Long-Chen yu Tian Li Ying-Jing Fan Shun-Jie Zeng Yan-Li Zhang Yi Zhang Xin Zhang Department of Clinical Laboratory Qilu Hospital of Shandong UniversityShandong Engineering Research Center of Biomarker and Artificial Intelligence ApplicationJinan 250012Shandong ProvinceChina Department of Clinical Laboratory Shandong Provincial Third HospitalJinan 250012Shandong ProvinceChina

Colorectal cancer(CRC)is one of the most common malignancies of the digestive tract,with the annual incidence and mortality increasing *** chemotherapy is a preferred therapeutic regimen for patients with advanced ***,most patients will inevitably develop resistance to *** studies have reported that non-coding RNAs(ncRNAs),such as microRNAs,long non-coding RNAs,and circular RNAs,are extensively involved in cancer ***,emerging evidence has revealed that ncRNAs mediate chemoresistance to oxaliplatin by transcriptional and post-transcriptional regulation,and by epigenetic *** this review,we summarize the mechanisms by which ncRNAs regulate the initiation and development of CRC chemoresistance to ***,we investigate the clinical application of ncRNAs as promising biomarkers for liquid CRC *** review provides new insights into overcoming oxaliplatin resistance in CRC by targeting ncRNAs.

关键词： Colorectal cancer Non-coding RNAs Oxaliplatin Resistance Liquid biopsy biomarkers

Optical Properties of Atomic Defects in Hexagonal Boron Nitride Flakes under High Pressure

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2020年第4期37卷 53-56页

作者： xiao-yu zhao Jun-Hui Huang Zhi-Yao Zhuo Yong-Zhou Xue Kun Ding Xiu-Ming Dou Jian Li Bao-Quan Sun State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083 College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049

We investigate the pressure spectral characteristics and the effective tuning of defect emissions in hexagonal boron nitride(hBN) at low temperatures using a diamond anvil cell(DAC). It is found that the redshift rate of emission energy is up to 10 meV/GPa, demonstrating a controllable tuning of single photon emitters through *** on the distribution character of pressure coefficients as a function of wavelength, different kinds of atomic defect states should be responsible for the observed defect emissions.

关键词： defect hexagonal boron

The concept and characteristics of clinical practice ability in Master Degree of Nursing (specialty)

在线全文

学校读者我要写书评

暂无评论

Chinese Nursing Research 2016年第3期3卷 97-100页

作者： Jing Zeng Jing-Ci Zhu xiao-yu zhao Chengdu Medical College Chengdu Sichuan 610083 China School of Nursing Third Military Medical University China

The concepts of ability, practice ability, and professional practice ability were analyzed using a theoretical research method. Based on the results of the analysis, the concept of clinical practice ability for Master Degree of Nursing（specialty） students was de？ned, and the characteristics were interpreted to provide references for future in-depth studies.

关键词： Nursing science Master Degree of Nursing (specialty) Clinical practice ability Concept Characteristics