检索结果-南通市图书馆

One Pot Synthesis of Bio-Ethylene Glycol from Cellulose

Modern Research in Catalysis 2021年第4期10卷 93-101页

作者： Yu-Wen Chen der-shing lee Department of Chemical and Materials Engineering National Central University Taipei City

In this study, various composite Ni-W2C/active carbon catalysts were synthesized. W2C was prepared by carbothermal hydrogen reduction. The metal loading of W2C in catalyst was 30 wt.%. Carbon was impregnated with metatungstate. It was dried at 120?C for 12 h. Carbon was then carburized in H2 flow, the temperature was increased from 25?C to 450?C, and then to 800?C and stayed for 4 h. The W2C/active carbon was treated with H2SO4 to create more function groups on the surface. Ni-W2C/active carbon was prepared by incipient-wetness impregnation method. After calcination and reduction processes in H2 flow, Ni-W2C/active carbon catalyst was obtained. The reaction of cellulose to ethylene glycol in one step was carried out in a batch reactor under the following condition: 1 g cellulose, 0.3 g catalyst, 100 ml H2

来源：

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

Liquid Phase Hydrogenation of p-Chloronitrobenzene on Au-Pd/TiO2Catalysts: Effects of Reduction Methods

引用

Modern Research in Catalysis 2013年第2期2卷 25-34页

作者： Yu-Wen Chen der-shing lee Department of Chemical and Materials Engineering National Central University Jhongli City Chinese Taipei

The effects of palladium addition and the reduction methods on Au/TiO2 were investigated. Pd was loaded on TiO2 firstly by incipient-wetness impregnation, Au was then loaded by deposition-precipitation method. The nominal loadings of Au and Pd were 1 wt% and 0.01 wt%. The bimetallic catalysts were reduced by heating at 453 K, by flowing H2 at 423 K, or by NaBH4 at 298 K. The catalysts were characterized by ICP, XRD, TEM, HRTEM, TPR and XPS. Hydrogenation of p-chloronitrobenzene was carried out at 1.2 MPa H2 pressure and 353 K. The results showed that even adding very small amount of Pd could enhance activity and selectivity of p-chloroaniline significantly. Pd and Au formed alloy and Pd could donate partial electron to Au. Pd metal on the surface of alloy could adsorb hydrogen and enhanced the activity. The pretreatment methods did not change particle size significantly, all were below 4 nm. The sample reduced by NaBH4 could have higher concentration of Au0 and sustain small Au particle size, resulting in high activity.

关键词： Nanoalloy Gold Catalyst Au-Pd Catalysts Hydrogenation of Chloronitrobenzene Chloroaniline

来源：

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

Au/CuOx-TiO2Catalysts for CO Oxidation at Low Temperature

引用

Modern Research in Catalysis 2013年第1期2卷 1-8页

作者： Feng-Chyi Duh der-shing lee Yu-Wen Chen Department of Chemical and Materials Engineering National Central University Chung-Li Chinese Taipei Department of Mechatronic Engineering Ta Hwa University of Science and Technology Hsin-Chu Chinese Taipei

A series of Au/CuOx-TiO2 with various Cu/Ti ratios were prepared. CuOx/TiO2 was prepared by incipient-wetness im- pregnation with aqueous solution of copper nitrate. Au catalysts were prepared by deposition-precipitation method at pH 7 and 338 K. The catalysts were characterized by inductively-coupled plasma-mass spectrometry, temperature pro- gramming reduction, X-ray diffraction, transmission electron microscopy, high-resolution transmission electron mi- croscopy and X-ray photoelectron spectroscopy. The reaction was carried out in a fixed bed reactor with a feed con- taining 1% CO in air at WHSV of 120,000 mL/h·g. High gold dispersion and narrow size distribution was obtained. The addition of CuOx in Au/TiO2 enhanced the activity on CO oxidation significantly. CuOx was in amorphous state which could stabilize the Au nanoparticles. Cu was in Cu1+ state. Cu donated partial electrons to Au. The interactions among Au, Cu1+ and TiO2 account for the high catalytic activity for CO oxidation. The significant promotional effect of CuOx on CO oxidation at low temperature was demonstrated.

关键词： CO Oxidation Gold Catalysts Copper Nanometal

来源：

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

对氯硝基苯在含镧的镍钼硼奈米触媒上的氢化反应(英文)

引用

催化学报 2013年第11期34卷 2018-2028页

作者：李德馨陈郁文中央大学化工与材料系

钼和镧是好的镍硼触媒的促进剂, 对于对氯硝基苯氢化反应有好的效果, 因此同时加入钼和镧在镍硼触媒上应该是有趣的研究题目. 本研究利用化学还原法制备了一系列含有不同量镧的镧钼镍触媒, 醋酸镍、钼酸胺及硝酸镧同时加入含有甲醇的... 详细信息

钼和镧是好的镍硼触媒的促进剂, 对于对氯硝基苯氢化反应有好的效果, 因此同时加入钼和镧在镍硼触媒上应该是有趣的研究题目. 本研究利用化学还原法制备了一系列含有不同量镧的镧钼镍触媒, 醋酸镍、钼酸胺及硝酸镧同时加入含有甲醇的水溶液中. 以X光绕射, 穿透式电子显微镜、高分辨率电子显微镜及X光光电能谱仪鉴定了这些触媒. 对氯硝基苯氢化反应是在批次反应器中于333 K、1.2 MPa氢气压力及500 r/min转速下操作. 即使在镍钼硼中加入很少量的镧, 对提高活性及对氯苯胺的选择性都有显著的效果, 加入适量的镧可以抑制镍钼硼的长范围的结晶排列, 并保持镍钼硼在非结晶状态. 镧以氧化态存在, 其功效为阻隔物, 避免镍钼硼聚集, 但是过量的镧会有相反的效果, 镧和镍的适当比例是0.2.

关键词：硼化镍镧氢化反应含氯硝基苯含氯苯胺

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

One Pot Synthesis of Bio-Ethylene Glycol from Cellulose

引用

Modern Research in Catalysis（催化剂现代研究） 2021年第4期

作者： Yu-Wen Chen der-shing lee

来源：评论

学校读者我要写书评

暂无评论

Protein surface recognition of the novel tetra-carboxylphenyl calix[4]arene to cytochrome c

引用

Chinese Chemical Letters 2008年第11期19卷 1341-1344页

作者： Wen Ting An Yong Jiao Xiao Hua Sun Chuan Dong Shao Min Shuang Ping Fang Xia Man shing Wong Research Center of Environmental Science and Engineering School of Chemistry and Chemical Engineering Shanxi University Taiyuan 030006 China Department of Chemistry Hong Kong Baptist University Kowloon Tong Hongkong S.A.R. China

The interaction of the novel tetra-carboxylphenyl calix[4]arene （TCPC） with the bovine heart cytochrome c （Cc） was first investigated by fluorescence spectroscopy and molecular modeling methods. The formation of a stable 1：1 complex was monitored by fluorescence titration, and its binding constant is 1.916 ×10^7 L mol^-1. Molecular modeling reveals the recognition mechanism of TCPC to the Cc surface, that is, the electrostatic interaction drives TCPC to the Cc surface, and the van der Waals interaction orientates TCPC parallel to the cleft of Cc.

关键词： Tetra-carboxylphenyl calixarene Cytochromc c Protein surface recognition Fluorescence spectroscopy Molecular modeling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Antibiotic Treatment Drives the Diversification of the Human Gut Resistome

引用

Genomics, Proteomics & Bioinformatics 2019年第1期17卷 39-51页

作者： Jun Li Elizabeth A.Rettedal Eric van der Helm Mostafa Ellabaan Gianni Panagiotou Morten O.A.Sommer Department of Infectious Diseases and Public Health Colleague of Veterinary Medicine and Life Sciences City Univerity of Hong Kong School of Data Science City Univerity of Hong Kong Novo Nordisk Foundation Center for Biosustainability Systems Biology and Bioinformatics Unit Leibniz Institute for Natural Product Research and Infection Biology – Hans Kn?ll Institute Systems Biology and Bioinformatics Group School of Biological Sciences Faculty of Sciences The University of Hong Kong Department of Microbiology Li Ka Shing Faculty of Medicine The University of Hong Kong

Despite the documented antibiotic-induced disruption of the gut microbiota, the impact of antibiotic intake on strain-level dynamics, evolution of resistance genes, and factors influencing resistance dissemination potential remains poorly understood. To address this gap we analyzed public metagenomic datasets from 24 antibiotic treated subjects and controls, combined with an in-depth prospective functional study with two subjects investigating the bacterial community dynamics based on cultivation-dependent and independent methods. We observed that shortterm antibiotic treatment shifted and diversified the resistome composition, increased the average copy number of antibiotic resistance genes, and altered the dominant strain genotypes in an individual-specific manner. More than 30% of the resistance genes underwent strong differentiation at the single nucleotide level during antibiotic treatment. We found that the increased potential for horizontal gene transfer, due to antibiotic administration, was ～3-fold stronger in the differentiated resistance genes than the non-differentiated ones. This study highlights how antibiotic treatment has individualized impacts on the resistome and strain level composition, and drives the adaptive evolution of the gut microbiota.

关键词： Antibiotics Resistome Gut microbiome Strain Evolution Horizontal gene transfer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

纳米级铋-钇铁柘榴石粉末的合成与烧结块材的铁磁共振性质

引用

过程工程学报 2006年第z2期6卷 338-341页

作者：傅彦培郑智文洪东兴林正雄姚永德东华大学材料科学与工程系台湾花莲97401 铭传大学计算机与通讯工程系吴凤技术学院化学工程系中央研究院物理研究所

以共沉淀法制备了纳米级铋-钇铁柘榴石粉末,并压锭成块材进行微波测试,因钇铁柘榴石块材烧结温度>1400℃,无法顺利导入低温多层共烧陶瓷制程(LTCC),本研究以掺杂铋元素进入柘榴石晶体内的方式,使块材烧结温度大幅下降,同时不降低其在微... 详细信息

以共沉淀法制备了纳米级铋-钇铁柘榴石粉末,并压锭成块材进行微波测试,因钇铁柘榴石块材烧结温度>1400℃,无法顺利导入低温多层共烧陶瓷制程(LTCC),本研究以掺杂铋元素进入柘榴石晶体内的方式,使块材烧结温度大幅下降,同时不降低其在微波应用上的性质.实验结果显示,随着掺杂铋元素的增加,块材的烧结温度最大可降至850℃,而微波应用于滤波器的亚铁磁共振(Ferrimagnetic magnetic resonance)特性在测量后证实并未遭受破坏.

关键词：钇铁柘榴石亚铁磁共振共沉淀法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Corrigendum to“Antibiotic Treatment Drives the Diversification of the Human Gut Resistome”[Genomics Proteomics Bioinformatics 17(1)(2019)39-51]

引用

Genomics, Proteomics & Bioinformatics 2020年第5期18卷 624-625页

作者： Jun Li Elizabeth A.Rettedal Eric van der Helm Mostafa Ellabaan Gianni Panagiotou Morten O.A.Sommer Department of Infectious Diseases and Public Health Colleague of Veterinary Medicine and Life SciencesCity University of Hong KongHong Kong Special Administrative RegionChina School of Data Science City University of Hong KongHong Kong Special Administrative RegionChina Novo Nordisk Foundation Center for Biosustainability DK-2900 HørsholmDenmark Systems Biology and Bioinformatics Unit Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute07745 JenaGermany Systems Biology and Bioinformatics Group School of Biological SciencesFaculty of SciencesThe University of Hong KongHong Kong Special Administrative RegionChina Department of Microbiology Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina

The editors regret there was an error in“Shotgun metagenome library construction and sequencing”section.“The raw sequences can be found in BGID(CRA000815)”should be corrected to“The raw metagenome sequencing data have been deposited in the Genome Sequence Archive at Beijing Institute of Genomics,Chinese Academy of Sciences(GSA:CRA000815),and are publicly accessible at https://***/gsa/”.The correct section is shown *** editors would like to apologize for any inconvenience caused.

关键词： (1) Antibiotic Genome

来源：

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

Tranexamic acid for intracerebral haemorrhage within 2 hours of onset: protocol of a phase Ⅱ randomised placebo-controlled double-blind multicentre trial

引用

Stroke & Vascular Neurology 2022年第2期7卷 158-165页

作者： Nawaf Yassi Henry Zhao Leonid Churilov Bruce C V Campbell Teddy Wu Henry Ma Andrew Cheung Timothy Kleinig Helen Brown Philip Choi Jiann-shing Jeng Annemarei Ranta Hao-Kuang Wang Geoffrey C Cloud Rohan Grimley Darshan Shah Neil Spratt der-Yang Cho Karim Mahawish Lauren Sanders John Worthington Ben Clissold Atte Meretoja Vignan Yogendrakumar Mai Duy Ton Duc Phuc Dang Nguyen Thai My Phuong Huy-Thang Nguyen Chung Y Hsu Gagan Sharma Peter J Mitchell Bernard Yan Mark W Parsons Christopher Levi Geoffrey A Donnan Stephen M Davis Department of Medicine and Neurology Melbourne Brain Centre at The Royal Melbourne HospitalThe University of MelbourneParkvilleVictoriaAustralia Population Health and Immunity Division Walter and Eliza Hall Institute of Medical ResearchParkvilleVictoriaAustralia Ambulance Victoria MelbourneVictoriaAustralia Melbourne Medical School The University of MelbourneMelbourneVictoriaAustralia Stroke Division The Florey Institute of Neuroscience and Mental HealthParkvilleVictoriaAustralia Department of Neurology Christchurch HospitalChristchurchNew Zealand Department of Neurology Monash Medical CentreMonash UniversityClaytonVictoriaAustralia Department of Interventional Neuroradiology Liverpool HospitalLiverpoolNew South WalesAustralia Department of Neurology Royal Adelaide HospitalAdelaideSouth AustraliaAustralia Department of Neurology Princess Alexandra HospitalWoolloongabbaQueenslandAustralia Department of Neurology Box Hill HospitalEastern HealthBox HillVictoriaAustralia Stroke Centre and Department of Neurology National Taiwan University HospitalTaipeiTaiwan Department of Medicine Dunedin School of MedicineUniversity of OtagoWellingtonNew Zealand Department of Neurosurgery E-Da HospitalYanchaoKaohsiungTaiwan Department of Neurology Alfred HospitalMelbourneVictoriaAustralia Department of Clinical Neuroscience Monash University Central Clinical SchoolMelbourneVictoriaAustralia Department of Medicine Sunshine Coast University HospitalNambourQueenslandAustralia Department of Neurology Gold Coast University HospitalSouthportQueenslandAustralia Department of Neurology John Hunter HospitalThe University of NewcastleNewcastleNew South WalesAustralia Department of Neurosurgery China Medical University HospitalTaichungTaiwan Department of Internal Medicine Palmerston North HospitalPalmerston NorthNew Zealand Department of Neurology St Vincent's HospitalFitzroyVictoriaAustralia Department of Neurology Royal Prince Alfred HospitalCamperdownNew South WalesAustra

Rationale Haematoma growth is common early after intracerebral haemorrhage(ICH),and is a key determinant of *** acid,a widely available antifibrinolytic agent with an excellent safety profile,may reduce haematoma *** and design Stopping intracerebral haemorrhage with tranexamic acid for hyperacute onset presentation including mobile stroke units(STOP-MSU)is a phase Ⅱ double-blind,randomised,placebo-controlled,multicentre,international investigator-led clinical trial,conducted within the estimand statistical *** In patients with spontaneous ICH,treatment with tranexamic acid within 2 hours of onset will reduce haematoma expansion compared with *** size estimates A sample size of 180 patients(90 in each arm)would be required to detect an absolute difference in the primary outcome of 20%(placebo 39%vs treatment 19%)under a two-tailed significance level of *** adaptive sample size re-estimation based on the outcomes of 144 patients will allow a possible increase to a prespecified maximum of 326 *** Participants will receive 1 g intravenous tranexamic acid over 10 min,followed by 1 g intravenous tranexamic acid over 8 hours;or matching *** efficacy measure The primary efficacy measure is the proportion of patients with haematoma growth by 24±6 hours,defined as either≥33%relative increase or≥6 mL absolute increase in haematoma volume between baseline and follow-up CT *** We describe the rationale and protocol of STOP-MSU,a phase Ⅱ trial of tranexamic acid in patients with ICH within 2 hours from onset,based in participating mobile stroke units and emergency departments.

关键词： placebo centre absolute

来源：

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

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：