检索结果-南通市图书馆

Optimization of phenol degradation by Candida tropicalis Z-04 using Plackett-Burman design and response surface methodology

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2011年第1期23卷 22-30页

作者： Jiangya Zhou Xiaojuan Yu Cong Ding Zhiping Wang qianqian Zhou hao Pao Weimin Ca School of Environmental Science and Engineering Shanghai Jiaotong University Dongchuan Road 800 Shanghai 200240 China.

Statistical experimental designs were used to optimize the process of phenol degradation by Candida tropicalis Z-04, isolated from phenol-degrading aerobic granules. The most important factors influencing phenol degradation （p 〈 0.05）, as identified by a two-level Plackett-Burman design with 11 variables, were yeast extract, phenol, inoculum size, and temperature. Steepest ascent method was undertaken to determine the optimal regions of these four significant factors. Central composite design （CCD） and response surface analysis were adopted to further investigate the mutual interactions between these variables and to identify their optimal values that would generate maximum phenol degradation. The analysis results indicated that interactions between yeast extract and temperature, phenol and temperature, inocuhim size and temperature affected the response variable （phenol degradation） significantly. The predicted results showed that the maximum removal efficiency of phenol （99.10%） could be obtained under the optimum conditions of yeast extract 0.41 g/L, phenol 1.03 g/L, inoculum size 1.43% （V/V） and temperature 30.04℃. These predicted values were further verified by validation experiments. The excellent correlation between predicted and experimental values confirmed the validity and practicability of this statistical optimum strategy. This study indicated the excellent ability of C. tropicalis Z-04 in degrading high-strength phenol. Optimal conditions obtained in this experiment laid a solid foundation for further use of this microorganism in the treatment of highstrength phenol effluents.

关键词： phenol degradation Candida tropicalis Z-04 optimization Plackett-Burman design response surface methodology

A Transparent Photoresist Made of Titanium Dioxide Nanoparticle-Embedded Acrylic Resin with a Tunable Refractive Index for UV-Imprint Lithography

在线全文

学校读者我要写书评

暂无评论

Engineering 2024年第6期37卷 96-104页

作者： Yinglu Liu Dan Wang Changlin Liu qianqian hao Jian Li Jie-Xin Wang Xiuyun Chen Peng Zhong Xibin Shao Jian-Feng Chen State Key Laboratory of Organic–Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China BOE Technology Group Co. Ltd.Beijing 100176China

Transparent photoresists with a high refractive index(RI)and high transmittance in visible wavelengths have promising functionalities in optical *** work reports a kind of tunable optical material composed of titanium dioxide nanoparticles embedded in acrylic resin with a high RI for ultraviolet(UV)-imprint *** hybrid film exhibits a tunable RI of up to 1.67(589 nm)after being cured by UV light,while maintaining both a high transparency of over 98%in the visible light range and a low haze of less than 0.05%.The precision machining of optical microstructures can be imprinted easily and efficiently using the hybrid resin,which acts as a light guide plate(LGP)to guide the light from the side to the top in order to conserve the energy of the display *** preliminary studies based on both laboratory and commercial experiments pave the way for exploiting the unparalleled optical properties of nanocomposite resins and promoting their industrial application.

关键词： Photoresist Tunable refractive index Hanson solubility Ultraviolet imprint Organic-inorganic composites

Graphdiyne as a saturable absorber for 2-µm all-solid-state Q-switched laser

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

Science China Materials 2021年第3期64卷 683-690页

作者： Yuqian Zu Jia Guo qianqian hao Feng Zhang Cong Wang Jie Liu Bing Wang Shandong Provincial Engineering and Technical Center of Light Manipulations and Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan250014China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan250358China Institute of Data Science and Technology Shandong Normal UniversityJinan250014China Institute of Microscale Optoelectronics Collaborative Innovation Center for Optoelectronic Science&TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen518060China

As a novel one-atom-thick carbon allotrope,graphdiyne(GDY)has attracted wide interest in two-dimensional materials owing to its unique feature with a planar layer comprising sp2-and sp-hybridized carbon atoms and a direct natural bandgap.A high-quality saturable absorber(SA)based on GDY was successfully fabricated,and the nonlinear saturable absorption properties were investigated.A compact diode-pumped solid-state passively Q-switched laser based on the as-prepared GDY-SA could be operated at 2µ*** Q-switched laser delivered a maximum average output power of 1.29 W at a central wavelength of 1908.41 nm with up to 54.8%slope efficiency.A repetition rate of 91.58 kHz and single pulse energy of 23.08µJ were *** work is the first application of GDY as an SA to generate all-solid-state pulsed *** results indicate that GDY is a promising SA for solid-state pulsed lasers and has further application potential for ultrafast photonic devices in the 2-µm region.

关键词： graphdiyne saturable absorber all-solid-state laser passively Q-switched two-dimensional materials

Highly efficient dual-wavelength acousto-optically Q-switched Tm,La:CaF_(2)laser

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2022年第11期20卷 38-42页

作者： qianqian hao Wenxin Liu Yuqian Zu Yangxiao Wang Jie Liu Liangbi Su Shandong Provincial Engineering and Technical Center of Light Manipulations and Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

A highly efficient milli-joule-level Q-switched Tm,La:CaF_(2)laser is experimentally *** employing an acousto-optic modulator,the diode-pumped pulsed lasers are stably operated at repetition rates ranging from 500 Hz to 10 ***-wavelength operation of 1881.7 nm and 1888.5 nm is achieved with slope efficiency of 64.7%.Up to 1.89 mJ of pulse energy is obtained at a pulse width of 100 ns,corresponding to a peak power of 18.88 *** results verified that the Tm,La:CaF_(2)crystal could be a promising candidate for achieving highly efficient and high-energy pulsed lasers.

关键词： 2μm thulium laser acousto-optical Q-switching Tm,La:CaF_(2)crystal dual-wavelength high energy high efficiency.

The synthesis, characterization and fluorescence property of a metal-organic framework {[Cd2(C26H19NO12)(H2O)]·2H2O}n

在线全文

学校读者我要写书评

暂无评论

The synthesis, characterization and fluorescence property of...

High single-pulse energy passively Q-switched laser based on Y b,Gd:SrF2 crystal

中国化学会第十届全国无机化学学术会议

作者： Mengyun Zhang Ling Guo qianqian hao Jiaxin Xie Xiandong Zhu College of Biological and Chemical Engineering Anhui Polytechnic University

A novel Cd(Ⅱ)-based coordination polymers{[Cd(CHNO)(HO)]·2HO} (1) has been successfully synthesized by Cd(NO)·4HO and 5-[N,N-bis(5-Methylisophthalic acid)amion]isophthalic acid through hydrothermal *** structure of the compound 1 was characterized by IR、X-ray single crystal diffraction and X-ray powder *** solid fluorescence property of the compound 1 was further *** result shows that the compound 1 has good fluorescence property at wavelength Em=430 nm and Ex=390 nm which indicates that the compound 1 will have great potential in detecting environmental *** addition,its crystallized in the orthorhombic system and Ccca space group.A crystallographically independent Cdion is present in an asymmetric structural unit using a 7-coordinate pattern,with six oxygen atoms supplied by carboxyl groups on the ligand and one by a ligand water molecule.

关键词： coordination polymer characterization fluorescence property

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Optics Letters 2020年第10期18卷 33-37页

作者： Mengfei Zhao Cong Wang qianqian hao Zhengting Zou Jie Liu Xiuwei Fan Liangbi Su Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China CAS Key Laboratory of Transparent and Opto-functional Inorganic Materials Synthetic Single Crystal Research CenterShanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China State Ley Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China

We report on laser diode(LD) pumped passively Q-switched Yb,Gd:SrF2 lasers with high single-pulse energy for the first time, to the best of our knowledge. In addition, a stable Q-switched laser based on a Cr4+:Y3Al5O12 saturable absorber was demonstrated. The maximum output power of the Q-switched laser obtained was 495 m W, with a pulse width and a pulse repetition rate of 233 ns and 1.238 kHz, respectively. The corresponding single-pulse energy and the peak power were as high as 400 μJ and 1.714 k W. The laser was operated under a transverse electromagnetic mode, and the beam quality was near-diffraction-limited.

关键词： diode pumping solid-state lasers passive Q-switching

在线全文

学校读者我要写书评

暂无评论

DDC到《中图法》类目映射方法研究

中国图书馆学报 2013年第1期 43-50页

作者：贾君枝郝倩倩山西大学管理学院

对于中外分类法的映射研究,国内多关注于对计算机自动映射方法的探讨,缺乏对词表类目复杂语义关系的具体研究。本文在对DDC和《中图法》理学领域共计4639个类目进行人工直接映射的基础上,通过统计其匹配依据,得出结论:理学类目下数学、... 详细信息

对于中外分类法的映射研究,国内多关注于对计算机自动映射方法的探讨,缺乏对词表类目复杂语义关系的具体研究。本文在对DDC和《中图法》理学领域共计4639个类目进行人工直接映射的基础上,通过统计其匹配依据,得出结论:理学类目下数学、物理、化学、天文、地理等不同学科内匹配依据的总体分布呈现一致性的特点,这为检验计算机自动匹配准确性提供了方法。实验表明,类目名称、注释、主题词、类目关系作为主要的判断依据,占映射类目的63%,依据匹配规则占映射的5.14%,依据书目记录的匹配占31.87%,因此论文建议实现计算机自动匹配时,除类目自身信息外,还需考虑书目记录的匹配。

关键词： DDC 《中图法》类目映射直接映射

基于传播要素的“快手”平台抗疫科普短视频对比研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

今日科苑 2023年第7期 46-58页

作者：郝倩倩中国科学技术馆北京100101

科普短视频在助力全民科学抗击新冠疫情中发挥了重要作用。本文基于传播要素,对比研究“快手”平台媒体、健康、科普三类账号疫情期间发布的抗疫科普短视频的传播现状。研究表明,不同传播主体传播内容特征显著,但产出结构不合理,传播效... 详细信息

科普短视频在助力全民科学抗击新冠疫情中发挥了重要作用。本文基于传播要素,对比研究“快手”平台媒体、健康、科普三类账号疫情期间发布的抗疫科普短视频的传播现状。研究表明,不同传播主体传播内容特征显著,但产出结构不合理,传播效果差距明显。建议构建多元主体参与的传播生态、以品牌化和信息化强化内容生产、注重渠道建设和用户维护、聚焦公众需求提升传播效果。

关键词：科普短视频新冠疫情传播要素

科普短视频在应急事件中的传播分析——以“新冠肺炎疫情”为例

在线全文

学校读者我要写书评

暂无评论

科普研究 2020年第5期15卷 23-31,107页

作者：郝倩倩中国科学技术馆北京100012

在新冠肺炎疫情应急事件中,科普短视频以其生产及时性、传播高效性、形式多样性和知识聚焦性的特征,在全民科学抗疫工作中发挥了重要作用。分析科普短视频在新冠肺炎疫情中的传播优势,归纳其分类及特征,总结存在的问题,并提出科普短视... 详细信息

在新冠肺炎疫情应急事件中,科普短视频以其生产及时性、传播高效性、形式多样性和知识聚焦性的特征,在全民科学抗疫工作中发挥了重要作用。分析科普短视频在新冠肺炎疫情中的传播优势,归纳其分类及特征,总结存在的问题,并提出科普短视频应当进一步完善生产发布机制、加强媒体、机构与科学家的协同机制、提升内容品质,以期科普短视频能在今后应急事件中发挥更强的传播功能,承担更多的社会责任。

关键词：科普短视频应急新冠肺炎