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Xiaoping Cai,Zhoujun Li,Xinyang Jiao,Jianzhong Wang,Xueqin Kang,Peizhong Feng,Farid Akhtar,Xiaohong Wang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10
Due to the high exothermic characteristic of NiAl during the reaction synthesis process from Ni–Al elemental powders, theNiAl intermetallic melts frequently, and the specimens are difficult to maintain their original shape, which leads to the inhomogeneityof the pore size and morphology. To tackle this problem, porous NiAl intermetallic monolith with controllableshape and pore structure was prepared through thermal explosion (TE) using NaCl as space holder. The TE behavior wasrecorded, and the effect of the volume fraction of NaCl on the phase composition, macroscopic feature, pore morphologyand open porosity were investigated. The results showed that NiAl was the main phase in the products, and the specimenwas free from cracking or deforming when NaCl content reached 30 vol%. The interconnected channel and pore windowswere formed, and the open porosity was improved greatly to 63% by adding 50 vol% NaCl. The leachable space holder routeprovides a simple way to control the shape, pore structure and open porosity of the synthesized porous NiAl intermetallic.
Liang Cai,Cai Jiaying,Xu Guiling,Xu Pan,Chen Xiaoping,Zhao Changsui 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.2
Conveying characteristics and flow stability are very important for design and control of a conveying system at high pressure. The influences of operating parameters and material properties on conveying characteristics were investigated in an experimental test facility with a conveying pressure up to 4MPa. Wavelet transform and Shannon entropy analysis were applied to analyzing pressure drops through horizontal pipe in order to obtain the stability criterion. Results indicated that the mass flow rate of biomass decreased, while the mass flow rate of pulverized coal increased at first and then decreased with the increase in fluidization velocity. Solid loading ratios for four kinds of powders decreased with the increase in fluidization velocity. Conveying phase diagrams and pressure drops through different test sections of pulverized coal and biomass at high pressure were obtained and analyzed. The influences of coal category,fracture characteristics and particle size on conveying characteristics were determined.
Chen Xiaoping,Fan Chunlei,Liang Cai,Pu Wenhao,Lu Peng,Zhao Changsui 한국화학공학회 2007 Korean Journal of Chemical Engineering Vol.24 No.3
of dense-phase pneumatic conveying of pulverized coal were carried out in a test facility witha conveying pressure up to 4 MPa. The influence of fluidization nitrogen flow rate, the flow rate of supplementarysolid mass flow rate was investigated. Test results indicate that with the increase in fluidization nitrogen flow rate, thesolid mass flow rate increases, and the solids to gas ratio increases at first and then declines. When the fluidization ofpulverized coal in the sending vessel becomes intensive, with the increase in supplementary nitrogen flow rate, thesolids to gas ratio declines and the solid mas flow rate increases. And the solid mass flow rate increases linearly withthe increase in presure diference between two hoppers. The experimental results provide a database for the design
Liang Cai,Chen Xiaoping,Zhao Changsui,Pu Wenhao,Lu Peng,Fan Chunlei 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.3
Experiments of dense-phase pneumatic conveying of pulverized coal using nitrogen were performed in an experimental test facility with the conveying pressure up to 4MPa and the solid-gas ratio up to 500 kg/㎥. The influences of the total conveying differential pressure, the moisture content, the superficial velocity and the pressure on the mass flow rate and the solid-gas ratio were investigated. Shannon entropy analysis of pressure fluctuation time series was developed to reveal the flow characteristics. Based on the distribution of the Shannon entropy in the different conditions, the flow stability and the evolutional tendency of Shannon entropy in different regimes and the regime transition processes were obtained. The results indicate that the solid gas ratio and Shannon entropy rise with increase in the total conveying differential pressure. A phase diagram and Shannon entropy reveal preferable regularity with superficial velocity. Shannon entropy is different for the different flow regimes, and it can be used to identify the flow regimes. As the moisture content increases, the mass flow rate, the pressure drop and Shannon entropy decrease. Shannon entropy rises with increase in pressure drop.
Sessler, Jonathan L.,Cai, Jiajia,Gong, Han-Yuan,Yang, Xiaoping,Arambula, Jonathan F.,Hay, Benjamin P. American Chemical Society 2010 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.132 No.40
<P>A pyrrolyl-based triazolophane, incorporating CH and NH donor groups, acts as a receptor for the pyrophosphate anion in chloroform solution. It shows selectivity for this trianion, followed by HSO<SUB>4</SUB><SUP>−</SUP> > H<SUB>2</SUB>PO<SUB>4</SUB><SUP>−</SUP> > Cl<SUP>−</SUP> > Br<SUP>−</SUP> (all as the corresponding tetrabutylammonium salts), with NH−anion interactions being more important than CH−anion interactions. In the solid state, the receptor binds the pyrophosphate anion in a clip-like slot <I>via</I> NH and CH hydrogen bonds.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2010/jacsat.2010.132.issue-40/ja107098r/production/images/medium/ja-2010-07098r_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja107098r'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja107098r'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja107098r'>ACS Electronic Supporting Info</A></P>
Effect of moisture content on dense-phase conveying of pulverized coal at high pressure
Xu Pan,Chen Xiaoping,Liang Cai,Xu Guiling,Liu Daoyin,Zhao Changsui 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.10
In dense-phase pneumatic conveying, the solid moisture content can significantly influence the conveying process, but there are very few studies in the open literature. In this study, the conveying experiments of two pulverized coals with various moisture contents were carried out at a 4MPa high pressure and dense-phase pneumatic conveying facility. Results show that the whole conveying system can be stably and controllably operated under the condition that moisture content below ~8%. With the increase of moisture content up to ~8%, the mass flow rate of 280 μm pulverized coal increases at first and then decreases, while that of 55 μm pulverized coal decreases continuously. The method of solid friction factor correlation is used to investigate pressure drop of the horizontal pipe, and non-dimensional parameters--Fr number, moisture content M and solid loading ratio μ--are investigated. The pressure drop predictions by this correlation are in good agreement with the experimental data. The solid friction factor correlations indicate that the fine coal is more sensitive to M, and μ plays a more important role for the coarse coal.
Qingfeng Xie,Zhuo Cao,Weiling You,Xiaoping Cai,Mei Shen,Zhangyong Yin,Yiwei Jiang,Xin Wang,Siyu Ye The Korean Society for Microbiology and Biotechnol 2024 Journal of microbiology and biotechnology Vol.34 No.2
New anti-lung cancer therapies are urgently required to improve clinical outcomes. Since ganodermanontriol (GDNT) has been identified as a potential antineoplastic agent, its role in lung adenocarcinoma (LUAD) is investigated in this study. Concretely, lung cancer cells were treated with GDNT and/or mycophenolate mofetil (MMF), after which MTT assay, flow cytometry and Western blot were conducted. Following bioinformatics analysis, carboxylesterase 2 (CES2) was knocked down and rescue assays were carried out in vitro. Xenograft experiment was performed on mice, followed by drug administration, measurement of tumor growth and determination of CES2, IMPDH1 and IMPDH2 expressions. As a result, the viability of lung cancer cells was reduced by GDNT or MMF. GDNT enhanced the effects of MMF on suppressing viability, promoting apoptosis and inducing cell cycle arrest in lung cancer cells. GDNT up-regulated CES2 level, and strengthened the effects of MMF on down-regulating IMPDH1 and IMPDH2 levels in the cells. IMPDH1 and IMPDH2 were highly expressed in LUAD samples. CES2 was a potential target for GDNT. CES2 knockdown reversed the synergistic effect of GDNT and MMF against lung cancer in vitro. GDNT potentiated the role of MMF in inhibiting tumor growth and expressions of CES2 and IMPDH1/2 in lung cancer in vivo. Collectively, GDNT suppresses the progression of LUAD by activating CES2 to enhance the metabolism of MMF.
Jian-Wei Zheng,Yinshen Yang,Shujuan Yang,Wei Zhou,Hongtian Qiu,Xiaoping Li,Qiuyun Cai,Ting Li,Gang Luo 한국통합생물학회 2018 Animal cells and systems Vol.22 No.2
Oral squamous cell carcinoma (OSCC) is the sixth most common cancer worldwide, which appears as a consequence of multiple molecular genetic events in various chromosomes and genes. In order to unveil the possible mechanisms underlying OSCC tumorigenesis, the OSCC-related gene expression variance and the gene interaction network should be further investigated. Herein, we conducted the NimbleGen Human Gene Expression Microarray to analyze expression heterogeneity between OSCC primary tumor tissue and its adjacent normal tissue from two patients. A total number of 7872 out of 32,448 detected genes are differentially expressed in OSCC. Gene ontology (GO) analysis demonstrated that these differentially expressed transcripts were critical in a series of metabolic processes, cancer-related signal pathways, and biological regulations. KEGG signaling pathway enrichment suggested a number of pathways (metabolic process and immune response) which are frequently enrolled during cancer progression. 15 most differential regulated genes between OSCC tumor and non-tumor were confirmed by quantitative reverse transcription polymerase chain reaction (qRT-PCR). Furthermore, the interaction network analysis of these confirmed genes by STRING database showed the two subunits of RACK1 had direct interaction with 14 differential proteins. This bioinformatics research lends support about the critical role of RACK1 which functions as a key node protein driving OSCC development.