Search results for: Zhongwei Zhu

Items from 1 to 14 out of 14 results

article

Helicobacter pylori infection associated with an increased risk of colorectal adenomatous polyps in the Chinese population

ChangxiChen, Yushan Mao, Juan Du, Yimin Xu, more

BMC Gastroenterology > 2019 > 19 > 1 > 1-6

Background Gastric Helicobacter pylori (H. pylori) is linked with chronic gastritis, peptic ulcer disease, and gastric malignancy. This study aims to investigate the association of gastric H. pylori with colorectal adenomatous polyps (CAP) in the Chinese population. Methods One thousand three hundred seventy five workers of China Petroleum and Chemical Corporation Sinopec Zhenhai Refining &...

article

Effects of Heat Intensity and Inflow Wind on the Reactive Pollution Dispersion in Urban Street Canyon

Xiaomin Xie, Zhongwei Zhu

Journal of Shanghai Jiaotong University (Science) > 2018 > 23 > 1 > 109-116

This paper investigates the impacts of heating intensity and inflow wind speed on the characteristics of reactive pollutant dispersion in street canyons using the computational fluid dynamic (CFD) model that includes the transportation of NO, NO₂, and O₃ coupled with NO-NO₂-O₃ photochemistry. The results indicated that the heat intensity and inflow wind speed have a significant influence on the flow...

article

Enhanced enantiostability of BINOL dimethyl ether under moderate acidic conditions

Alexander M. Genaev, George E. Salnikov, Andrey V. Shernyukov, Zhongwei Zhu, more

Mendeleev Communications > 2018 > 28 > 1 > 27-28

Compared with the parent 1,1’-bi-2-naphthol (BINOL), its dimethyl ether is highly resistant towards racemization under moderate acidic conditions. This finding confirms the hypothetical mechanism of BINOL atropisomerization including internal rotation around the C¹_sp3 –C^1'_sp3 bond in its protonatedforms.

chapter

BEOL compatible graphene/Cu with improved electromigration lifetime for future interconnects

Ling Li, Zhongwei Zhu, Tao Wang, Jean A. Currivan-Incorvia, more

2016 IEEE International Electron Devices Meeting (IEDM) > 9.5.1 - 9.5.4

2016 IEEE International Electron Devices Meeting (IEDM)

We demonstrate a method to grow graphene directly on patterned Cu wires below 400 °C, within the thermal budget of back-end-of-line processes (BEOL). The process flow is compatible with direct etched Cu processes for advanced interconnects technology. The graphene/Cu composite exhibits 2× lower resistivity, 1.4× higher breakdown current density and 40× longer electromigration (EM) lifetime than as-deposited...

article

Experimental investigations on the effectiveness of micro heat pipe array heat exchanger for heat recovery for residential building

ZhongWei Zhu, HongMing Fan, Cheng Zhang

Applied Thermal Engineering > 2016 > 102 > C > 980-988

For residential building, air-to-air heat exchanger for heat recovery using micro heat pipes array (MHPA) were designed, constructed and tested under normal temperature operating conditions. The heat exchanger is constituted by 4 rows of MHPA and each row has 12 heat pipes. A heat exchange has been developed and constructed for investigating the performance of the heat exchanger for heat recovery...

article

A convenient synthesis of 8-hydroxy-1-tetralones from naphthalene-1,8-diol

Zhongwei Zhu, Konstantin Yu. Koltunov

Mendeleev Communications > 2016 > 26 > 1 > 79-80

Naphthalene-1,8-diol on superelectrophilic activation with aluminium halides smoothly reacts with cyclohexane and benzene to afford 8-hydroxy-1-tetralone and 8-hydroxy-4-phenyl-1-tetralone, respectively.

article

Reactions of 2,3-naphthalenediol with cyclohexane in the presence of aluminum halides

Zhongwei Zhu, Ludmila A. Ostashevskaya, Konstantin Yu. Koltunov

Tetrahedron Letters > 2015 > 56 > 17 > 2254-2257

2,3-Naphthalenediol (7) undergoes selective ionic hydrogenation with cyclohexane in the presence of excess AlCl ₃ or AlBr ₃ to afford 5,6,7,8-tetrahydro-2,3-naphthalenediol (8). Compound 8 can be further converted into 5,6,7,8-tetrahydro-1,2-naphthalenediol (9) and pyrocatechol (10). The discovered reactions represent new and efficient synthetic approaches to produce difficult to obtain...

article

Monodisperse Metal Nanoparticle Catalysts: Synthesis, Characterizations, and Molecular Studies Under Reaction Conditions

Vladimir V. Pushkarev, Zhongwei Zhu, Kwangjin An, Antoine Hervier, more

Topics in Catalysis > 2012 > 55 > 19-20 > 1257-1275

We aim to develop novel catalysts that exhibit high activity, selectivity and stability under real catalytic conditions. In the recent decades, the fast development of nanoscience and nanotechnology has allowed synthesis of nanoparticles with well-defined size, shape and composition using colloidal methods. Utilization of mesoporous oxide supports effectively prevents the nanoparticles from aggregating...

article

A Pt-Cluster-Based Heterogeneous Catalyst for Homogeneous Catalytic Reactions: X-ray Absorption Spectroscopy and Reaction Kinetic Studies of Their Activity and Stability against Leaching

Yimin Li, Jack Hung-Chang Liu, Cole A. Witham, Wenyu Huang, more

Journal of the American Chemical Society > 2011 > 133 > 34 > 13527 - 13533

article

Surface Composition and Catalytic Evolution of Au_xPd_1−x (x = 0.25, 0.50 and 0.75) Nanoparticles Under CO/O₂ Reaction in Torr Pressure Regime and at 200 °C

Selim Alayoglu, Franklin Tao, Virginia Altoe, Colin Specht, more

Catalysis Letters > 2011 > 141 > 5 > 633-640

Au_xPd_1−x (x = 0, 0.25, 0.5, 0.75, 1) nanoparticle (NP) catalysts (8–11 nm) were synthesized by a one-pot reaction strategy using colloidal chemistry. XPS depth profiles with variable X-ray energies and scanning transmission electron microscopy (STEM) analyses show that the as-synthesized Au_xPd_1−x (x = 0.25 and 0.5) bimetallic NPs have gradient alloy structures with Au-rich cores and Pd-rich...

article

Evolution of Structure and Chemistry of Bimetallic Nanoparticle Catalysts under Reaction Conditions

Feng Tao, Michael E. Grass, Yawen Zhang, Derek R. Butcher, more

Journal of the American Chemical Society > 2010 > 132 > 25 > 8697 - 8703

article

Molecular Dynamics Study of the Connection between Flap Closing and Binding of Fullerene-Based Inhibitors of the HIV-1 Protease ^†

Zhongwei Zhu, David I. Schuster, Mark E. Tuckerman

Biochemistry > 2003 > 42 > 5 > 1326 - 1333

article

Ab Initio Molecular Dynamics Investigation of the Concentration Dependence of Charged Defect Transport in Basic Solutions via Calculation of the Infrared Spectrum ^†

Zhongwei Zhu, Mark E. Tuckerman

The Journal of Physical Chemistry B > 2002 > 106 > 33 > 8009 - 8018

article

Transient Magnetic Reconnection Processes at the High Latitude Boundary Layer.

Zhenxing Liu, Zhongwei Zhu, Zuyin Pu

Chinese Science Abstracts Series B > 1995 > 14 > 4 Part B > 57

By using a two-dimensional compressible MHD model, the transient magnetic reconnection processes at the nightside magnetopause boundary layer are simulated based on the theary of vortex-induced reconnection. It is found that when the IMF has a southwardB _z , the IMF connects with the geomagnetic field at the nightside northern magnetopause only when the IMF B _x component is opposite...

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