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| 1 | Preparation, Characterization of Superacid SO_4^(2-)/ZrO_2-SiO_2 and Its Activity on Catalytic Synthesis of Methyl p-Nitrobenzoate显示文摘Solid superacid SO42-/Zr O2-SiO2 was prepared by dip-impregnation method, and its catalytic activity was tested with esterification of p-nitrobenzoic acid and methanol. The optimum conditions were also found, that is, the molar ratio between silica and zirconia was 10:1, the calcination temperature was 550 ℃ and the soaked consistency of H2SO4 was 1.0 mol?L-1. Under the conditions that the ratio of methanol to acid(m L/g) was 12:1, the amount of catalyst was 0.5 g, the reaction time was 5 h and the stirring speed was 800 r?min-1, the yield of methyl p-nitrobenzoate could reach up to 90.5%. Then the characterizations of cataslyst, including the acidity and types of acidic centers, specific surface area and surface structure was respectively examined by Hammett indicator, in-situ pyridine IR, BET method, FT-IR(KBr), transmission electron microscope(TEM), and X-ray diffraction(XRD). The results showed that the catalyst SO42-/Zr O2-SiO2 was superacid with high specific surface area due to Ho<-12.70. It contained acidic sites of Lewis and BrΦnsted, and its surface structure changed after esterification. The zirconia crystal was mainly tetragonal and silica crystal was not found. | 王刚 TAO Liya HOU Xin CAO Hi DONG Cheng NIE Wo XU Jun 张立庆 | 2014 | Journal of Wuhan University of Technology(Materials Science)2014，29，5： | 2 |
| 2 | Technology research on waterworks sludge for ceramsite显示文摘 | Hi Jun Wang Qishan | 2012 | Advanced Materials Research Vols2012，，383390： | 1 |
| 3 | A regularity theory for a general class of quasilinear elliptic partial differential equations and obstacle problems显示文摘 | Hi Jun Choe | 1991 | Archive for Rational Mechanics and Analysis1991，，4： | 1 |
| 4 | Use of chloride-hypochlorite leachants to recover gold from tailing 显示文摘 | Kwang Soo Nam Byoung Hi Jung Jeon Woong An Tae Jun Ha Tam Tran Myong Jun Kim | 2008 | International Journal of Mineral Process2008，86，： | 1 |
| 5 | Effects of total cholesterol and triglyceride on the percentage difference between the low density lipoprotein cholesterol concentration measured directly and calculated using the friedewald formula显示文摘 | Jun KR Park HI Chun S | | 0，，03： | 1 |
| 6 | Strong Solutions of the Navier-Stokes Equations for Isentropic Compressible Fluids显示文摘 | Choe Hi Jun Kim Hyunseok | 2003 | Journal of Differential Equations2003，190，： | 1 |
| 7 | Unique Solvability of the Initial Boundary Value Problems for Compressible Viscous Fluids显示文摘 | Cho Yonggeun Choe Hi Jun Kim Hyunseok | 2004 | Journal Mathematics Pure and Applications2004，83，： | 1 |
| 8 | Development of fiaxis force/moment sensor for a humanoid robot' s intelligent foot显示文摘 | Kim Gab Soon Shin Hi Jun Yoon Jnng Won | 2008 | Sensors and Actuators A: Physical2008，141，： | 1 |
| 9 | Decay rate for the incompressible flows in half spaces显示文摘 | Hyeong-Ohk Bae Hi Jun Choe | 2001 | Mathematische Zeitschrift2001，，4： | 1 |
| 10 | Predictors of response to immunosuppressive therapy with antithymocyte globulin and cyclosporine and prognostic factors for survival in patients with severeaplastic anemia 显示文摘 | Chang MH Kim KH Kim HS Jun HI Kim DH Jang JH | 2010 | Eur J Haematol2010，84，2： | 1 |
| 11 | Noneutaneous malignant melanoma : a prognostic model from a retrospective muhicenter study显示文摘 | Kim HS Kim EK Jun HI | 2010 | BMC Cancer2010，10，： | 1 |
| 12 | Comparison of various treatment modalities for acute tinnitus显示文摘 | Shim HI Jun Song S Choi AY | 2011 | Laryngoscope2011，121，12： | 1 |
| 13 | A Safeguard System for Induced Pluripotent Stem Cell-Derived Rejuvenated T Cell Therapy显示文摘 | Miki Ando Toshinobu Nishimura Satoshi Yamazaki Tomoyuki Yamaguchi Ai Kawana-Tachikawa Tomonari Hayama Yusuke Nakauchi Jun Ando Yasunori Ota Satoshi Takahashi Ken Nishimura Manami Ohtaka Mahito Nakanishi John J. Miles Scott R. Burrows Malcolm K. Brenner Hi | 2015 | Stem Cell Reports2015，，4： | 1 |
| 14 | Impact of MET amplication on gastric cancer:possible roles as novel prognostic marker and a potential therapeutic target 显示文摘 | Lee J Seo JW Jun HI | 2011 | Oncology Reports2011，25，6： | 1 |
| 15 | Uncooled thennopile infrared detector with chromium oxide absorption layer显示文摘 | Sung Jun Lee Yun Hi Lee Sang Hi Suh | 2001 | Sensors and Actuators A2001，，95： | 1 |
| 16 | Synthesis of 1H-thiopyrano[3,4-b] Quinolin-4(3H)-one and TheirHeterocycle Fused Compounds显示文摘1H-Thiopyrano[3,4-b] quinolin4(3h)-one 1, a ncw series of heterotricyclic ketone and their heterocycle fused compounds (2 and 3) were prepared by a simple procedure in good yields. | Yong Jun GAO Feng Jun LI hi Shan JIANG(Department of Chemistry, Yanbian University, Yani, Jilin, 133002)Shi Chen ZHOU(Department of Chemistry, Jinzhou Teacher’s College, Jinzhou 121000) | 1997 | Chinese Chemical Letters1997，8，1： | 0 |
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