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| 1 | Catalytic performance of Cu-and Zr-modified beta zeolite catalysts in the methylation of 2-methylnaphthalene显示文摘2,6-Dimethylnaphthalene(2,6-DMN) is a commercially important chemical for the production of polyethylenenaphthalate and polybutylene naphthalate. However, its complex synthesis procedure and high production cost significantly reduce the use of 2,6-DMN. In this study, the synthesis of 2,6-DMN was investigated with methylation of 2-methylnaphthalene(2-MN) over metal-loaded beta zeolite catalysts including beta zeolite, Cu-impregnated beta zeolite and Zr-impregnated beta zeolite. The experiments were performed in a fixed-bed reactor at atmospheric pressure under a nitrogen atmosphere. The reactor was operated at a temperature range of 400–500 °C and varying weight hourly space velocity between 1 and 3 h^(-1).The results demonstrated that 2,6-DMN can be synthesized by methylation of 2-MN over beta type zeolite catalysts.Besides 2,6-DMN, the product stream also contained other DMN isomers such as 2,7-DMN, 1,3-DMN, 1,2-DMN and 2,3-DMN. The activity and selectivity of beta zeolite catalyst were remarkably enhanced by Zr impregnation, whereas Cu modification of beta zeolite catalyst had an insignificant effect on its selectivity. The highest conversion of 2-MN reached81%, the highest ratio of 2,6-DMN/2,7-DMN reached 2.6 and the highest selectivity of 2,6-DMN was found to be 20% by using Zr-modified beta zeolite catalyst. | Fatih Gülec Farooq Sher Ali Karaduman | 2019 | Petroleum Science2019，16，1： | 8 |
| 2 | ON MAXWELL EQUATIONS WITH THE TRANSPARENT BOUNDARY CONDITION显示文摘在这篇论文,我们显示出与透明边界条件散布问题的马的 well-posedness 和稳定性。证明取决于与也被建立的复杂波浪数字散布问题的时间泛音麦克斯韦的 well-posedness。 | Zhiming Chen Jean-Claude Nédélec | 2008 | Journal of Computational Mathematics2008，26，3： | 4 |
| 3 | 马立克病病毒群共同性抗原P79蛋白质基因的鉴定和定位显示文摘马立克病病毒(MDV)的79kD蛋白质是该属3个型共有的抗原。用抗该抗原的单克隆抗体T81(MAb T81),从建于大肠杆菌噬菌体λgt11中MDV感染的鸭胚成纤维细胞基因组DNA的基因库中,筛选到一个能表达该蛋白质片段的克隆GB-2。对该重组噬菌体的DNA做酶切分析,用PCR扩增插入片段,结果表明GB-2含一个2.5kb来自MDV的插入片段。用标记的该片段DNA作探针,分别与GA株MDV感染的鸭胚成纤维细胞基因组DNA的限制性内切酶消化物及MDV基因组DNA的BamH I-B片段做Southern blot和分子杂交反应,结果证明,编码MDV属共同抗原79kD蛋白质的基因位于其基因组DNA酶切图的BamH I-R片段及B和O片段与R联结的部分。 | 崔治中 段玉友 Lec L.F. | 1993 | 病毒学报1993，9，1： | 4 |
| 4 | Correlation between water diffusion and adhesion loss: Study of an epoxy primer on steel显示文摘 | Elise Legghe Emmanuel Aragon Léna?k Bélec André Margaillan Denis Melot | 2009 | Progress in Organic Coatings2009，，3： | 2 |
| 5 | Transpediaclar instrumentation ar an adjunet in the treatment of thoraco-lumbar and lumbar spine tabercalosis with early stage bone dectruction 显示文摘 | Lec TC Lu K Yang LG | 1999 | J Neurosurg1999，91，2： | 1 |
| 6 | Surrogate end points in heart failure 显示文摘 | LEC C R ADAMS K F PATTERSON J H | 2002 | Ann Pharmacother2002，36，3： | 1 |
| 7 | lung B Preparation of magnetic ion-exchange resins by'thesuspension polymerization of styrene with magnetite显示文摘 | Lec Y RhoJ | 2003 | Jour nal of Applied Polymer Science2003，89，： | 1 |
| 8 | The rupture of atriovcntricular groove aRcr mitral valve replacement in an elderly patient 显示文摘 | Kwon Jr lung TE Lec DH | 2014 | J Cardiotho- rac Surg2014，，： | 1 |
| 9 | Plasticizer efect on themehing and crystallization behavior of polyvinyl alcohol 显示文摘 | JYONGSIK J LEC D K | 2003 | Polymer2003，44，26： | 1 |
| 10 | Postchoolectomy abdominal b:ole kocColleetions显示文摘 | Stewant L Way LW | 2000 | Archsorg2000，135，5： | 1 |
| 11 | Recurrent thyroglossal ductcysts: a clinical and pathologic analysis 显示文摘 | Ducic Y Chou S Drku lec J | 1998 | hat J Pediatr Otorhinolaryn- gol1998，44，1： | 1 |
| 12 | Planning of Component Place-ment/insertion Sequence and Feeder Setup in PCB Assem-bly Using Genetic Algorithm显示文摘 | LEC MC WONG H JI Z | | 0，，： | 1 |
| 13 | Ginsenoside- Rgl,one of the major active molecules from Panax ginseng,is a functional ligand of glucocorticoid receptor显示文摘 | Lec Y J Chung E Lee K Y | 1997 | Molecular & Cellular Endocrinolo- gy1997，133，2： | 1 |
| 14 | Relevance of the immunofluorescence pattern for interpretation of the ANA test-the case of the dense fine speckled pattern显示文摘 | Dellavance A Leser PG Andrade LEC | 2007 | Revista da Associacao Mediea Brasileira2007，53，5： | 1 |
| 15 | Genital Human papillomavims infection: Incidence and risk factors in a cohort of female university students显示文摘 | Winer RL Lec SK Hughes JP | 2003 | Am J Epidemiol2003，157，： | 1 |
| 16 | Postchoolect omy abdominal bole kocCollections显示文摘 | Lec CM Stewant L Way LW | 2000 | Arehsorg2000，135，： | 1 |
| 17 | Orientation and microstructure of watts and bright nickel electrodeposite显示文摘 | Lec D N Ye G C | 1981 | Plat & Surf Fin1981，68，11： | 1 |
| 18 | Synthesis of pegylated immunonanoparticles 显示文摘 | Olivier J C Huertas R Lec H J | 2002 | Pharm Res2002，19，8： | 1 |
| 19 | A Stnuctural Model for Examining How Destination Image and Interpretation Services Affect Future Visitation Behavior:A Case Study of Taiwan's Taomi Eco-village显示文摘 | Lec T H | 2009 | Journal of Sustainable Tourism2009，17，6： | 1 |
| 20 | Overexpression of the pIgR gene in the mammary gland of transgenic mice influences the milk composition and reduces its nutritional value显示文摘 | de Groot N van Knik-Romeijn P Lec S H | 2001 | Transgenic Research2001，10，4： | 1 |
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