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Search Results: 1 - 10 of 100221 matches for " Bin-Hao Chen "
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Numerical simulation and performance test of metal hydride hydrogen storage system
Tzu-Hsiang Yen, Bin-Hao Chen, Bao-Dong Chen
International Journal of Energy and Environment , 2011,
Abstract: Metal hydride reactors are widely used in many industrial applications, such as hydrogen storage, thermal compression, heat pump, etc. According to the research requirement of metal hydride hydrogen storage, the thermal analyses have been implemented in the paper. The metal hydride reaction beds are considered as coupled cylindrical tube modules which combine the chemical absorption and desorption in metal hydride. The model is then used metal hydride LaNi5 as an example to predict the performance of metal hydride hydrogen storage devices, such as the position of hydration front and the thermal flux. Under the different boundary condition the characteristics of heat transfer and mass transfer in metal hydride have influence on the hydrogen absorption and desorption. The researches revealed that the scroll design can improve the temperature distribution in the reactor and the porous tube for directing hydrogen can increase the penetration depth of hydride reaction to decrease the hydrogen absorption time.
Oval Cell Response Is Attenuated by Depletion of Liver Resident Macrophages in the 2-AAF/Partial Hepatectomy Rat
Shuai Xiang, Han-Hua Dong, Hui-Fang Liang, Song-Qing He, Wei Zhang, Chang-Hai Li, Bi-Xiang Zhang, Bin-Hao Zhang, Kai Jing, Stephen Tomlinson, Nico van Rooijen, Li Jiang, Katherine Cianflone, Xiao-Ping Chen
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0035180
Abstract: Background/Aims Macrophages are known to play an important role in hepatocyte mediated liver regeneration by secreting inflammatory mediators. However, there is little information available on the role of resident macrophages in oval cell mediated liver regeneration. In the present study we aimed to investigate the role of macrophages in oval cell expansion induced by 2-acetylaminofluorene/partial hepatectomy (2-AAF/PH) in rats. Methodology/Principal Findings We depleted macrophages in the liver of 2-AAF/PH treated rats by injecting liposome encapsulated clodronate 48 hours before PH. Regeneration of remnant liver mass, as well as proliferation and differentiation of oval cells were measured. We found that macrophage-depleted rats suffered higher mortality and liver transaminase levels. We also showed that depletion of macrophages yielded a significant decrease of EPCAM and PCK positive oval cells in immunohistochemical stained liver sections 9 days after PH. Meanwhile, oval cell differentiation was also attenuated as a result of macrophage depletion, as large foci of small basophilic hepatocytes were observed by day 9 following hepatectomy in control rats whereas they were almost absent in macrophage depleted rats. Accordingly, real-time polymerase chain reaction analysis showed lower expression of albumin mRNA in macrophage depleted livers. Then we assessed whether macrophage depletion may affect hepatic production of stimulating cytokines for liver regeneration. We showed that macrophage-depletion significantly inhibited hepatic expression of tumor necrosis factor-α and interleukin-6, along with a lack of signal transducer and activator of transcription 3 phosphorylation during the early period following hepatectomy. Conclusions These data indicate that macrophages play an important role in oval cell mediated liver regeneration in the 2-AAF/PH model.
Study on the mechanism of Hall effect thruster discharge with bistable state
霍尔效应推力器放电双稳态机理研究

Han Ke,Jiang Bin-Hao,Ji Yan-Chao,
韩轲
,江滨浩,纪延超

物理学报 , 2012,
Abstract: Experimental results indicate that there exist two stable discharge operation points in a self-excited mode Hall effect thruster. During the operation, the discharge operation point jumps to and fro between two values, which greatly influences the physical process of plasma discharge in the thruster channel and the comprehensive performance of thrusters. In this paper, by using the relationship between discharge magneto-ampere characteristic curve and magnetic field coil current curve, we propose the physical mechanism of forming the discharge bistable characteristic. On the basis of the mechanism, a method of stabilizing the single discharge operation point is presented through changing the slope of magnetic field coil current curve. The physical explanation is given through established one-dimensional dynamic fluid model for self-excited mode, and the results are approved by the self-excited experiment.
Experimental study of vacuum backpressure on the discharge characteristics of a Hall thruster
真空背压对霍尔推力器放电特性影响的实验研究

E Peng,Duan Ping,Wei Li-Qiu,Bai De-Yu,Jiang Bin-Hao,Xu Dian-Guo,
鄂鹏
,段萍,魏立秋,白德宇,江滨浩,徐殿国

物理学报 , 2010,
Abstract: It is found that the vacuum backpressure affects the flow of background gas into a Hall thruster channel. The flow of background gas can affect the ionization of propellants and the conductivity of electrons, and thereby affect the physical process and discharge characteristic of Hall thrusters. In order to investigate these effects, the atomic and the ionic emission spectra in the discharge channel and the ions energy distribution are measured under different vacuum backpressures. The experimental results indicate that the increase of vacuum backpressure can reduce the electron temperature and ionization efficiency of propellants and a new ionization region appears near exit plane in the channel; and moreover, it is found that the new ionization region penetrates into the channel more deeply under the higher vacuum backpressure case.
On the effect of magnetic field gradient on the discharge characteristics of Hall thrusters
磁场梯度对Hall推力器放电特性影响的实验研究

E Peng,Duan Ping,Jiang Bin-Hao,Liu Hui,Wei Li-Qiu,Xu Dian-Guo,
鄂鹏
,段萍,江滨浩,刘辉,魏立秋,徐殿国

物理学报 , 2010,
Abstract: An experiment was performed to investigate how the magnetic field gradient in strong field zone affects the discharge processes of Hall thrusters, such as the ionization and acceleration of propellants, for further research on optimal design theory of magnetic field in discharge channels of Hall thrusters. The results show that magnetic field strength has little effect on the ionization of propellants within the designed range of magnetic field gradient, but has significant influence on the acceleration of ions.With the increase of magnetic field gradient, the ion-beam energy distribution tends to be concentrated, and the thrust efficiency tends to rise. Finally, further increase of magnetic field gradient may lead to a series of physical problems,among whith such as the finite Larmor radius effect, the changes in the law of electronic conduction mechanism, and the magnetic field gradient drift are analyzed.
Cloning, Characterization and Bioinformatic Analysis of the Gene Encoding the Larval Serum Protein 2 in Diapause of the Onion Maggot, Delia Antiqua  [PDF]
Jingjing Xu, Bin Chen, Zhengbo He, Youjin Hao
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B100
Abstract:

The full-length cDNA encoding Larval serum protein 2 (LSp-2) in the onion maggot,Delia antiqua, was cloned and sequenced by rapid ampli?cation of cDNA ends methods. The result showed that the cDNA was 2203 bp long and the open reading frame (ORF) of 2106 bp encoded 701 amino acid with a calculated molecular weight of 80.5 kDa and an isoelectric point of 5.87. The onion maggot LSp-2 shows highest homology (83%) to that ofCalliphora vicinaat amino acid level. Its signal peptides, domains and structures were predicted and analyzed by using bioinformatic methods. The amino acid sequence of LSP-2 suggests that it would be a typical hexamerin.

Pse-in-One 2.0: An Improved Package of Web Servers for Generating Various Modes of Pseudo Components of DNA, RNA, and Protein Sequences  [PDF]
Bin Liu, Hao Wu, Kuo-Chen Chou
Natural Science (NS) , 2017, DOI: 10.4236/ns.2017.94007
Abstract:
Pse-in-One 2.0 is a package of web-servers evolved from Pse-in-One (Liu, B., Liu, F., Wang, X., Chen, J. Fang, L. & Chou, K.C. Nucleic Acids Research, 2015, 43:W65-W71). In order to make it more flexible and comprehensive as suggested by many users, the updated package has incorporated 23 new pseudo component modes as well as a series of new feature analysis approaches. It is available at http://bioinformatics.hitsz.edu.cn/Pse-in-One2.0/. Moreover, to maximize the convenience of users, provided is also the stand-alone version called “Pse-in-One-Analysis”, by which users can significantly speed up the analysis of massive sequences.
Charged Amino Acid Frequencies of Proteins over Macroevolutionary Time Scale  [PDF]
Yu-Juan Zhang, Jian-Jun Li, You-Jin Hao, Bin Chen
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B086
Abstract:

Charged amino acids (AAs) are targets for selective forces in protein evolution. To fully explore the trend of charged AA frequencies evolution in macroevolutionary process from prokaryotes to eukaryotes, we extend the analysis of five charged AAs separately and total basic and acidic AAs in protein sequences of 158 prokaryotic and 63 eukaryotic predicted proteomes and 456 clusters of orthologous groups (COGs). Also, we eliminate the biases that may caused by extreme organisms in both predicted proteomes and COGs analyses. More basic AAs, His,Lysand Glu were found in eukaryotic proteins compared with prokaryotic proteins by predicted proteomes analysis. By COGs analysis, we found that basic AAs andLysfrequencies are higher in eukaryotic orthologous proteins than their prokaryotic companions, while the trend of Arg frequency is the opposite. We discussed the agreements and disagreements of two analyses and gained a more credible trend of charged AAs evolution in macroevolutionary time scale.

ANALYSIS OF WAVEGUIDE LOADED WITH DIELECTRIC USED AS MILLIMETER WAVE FOCAL IMAGING ARRAY ELEMENTS
用于毫米波焦面成像阵的介质加载波导阵元分析

CHEN Hao DOU Wen,Bin,
陈昊
,窦文斌

红外与毫米波学报 , 2003,
Abstract: 分析了有望用于毫米波成像焦面阵的介质加载波导阵元,采用时域有限差分法(FDTD)计算输入特性,优化了输入基本匹配时的结构尺寸参数,计算该结构参数下的阵元与成像透镜衍射场Airy斑的耦合效率并与其它阵元做了比较。
Cloning and Sequence Analysis of Glutathione Stransferase Gene in Delia antiqua
XIA Jie,CHEN Bin,HAO Youjin,SI Fengling
Journal of Chongqing Normal University , 2012,
Abstract: Glutathione Stransferase (GST) is a kind of detoxifying enzymes widely existing in insects. Its peroxidase vitality can protect the organisms against endogenous or oxide damage. The insect resistance to some pesticides is relative to the expression quantity of GST, and past research of insect GST mainly focused on the important role in the formation of pesticides resistance. This kind of genes can be used as the target of insecticide to design and develop new pesticides. In this research, the full length of GST cDNA of the onion maggot (Delia antiqua) was cloned using RACE technique (GenBank access number: JQ625502). The result showed that the full length of cDNA is 874 bp long, with an open reading frame (ORF) of 627 bp, encoding a protein of 208 amino acids with a calculated molecular weight of 239 kD and theoretical isolectric point of 583. The deduced amino acid sequence has the highest identity with that of Lucilia cuprina based homological analysis, and a phylogenic tree was inferred with homological GST sequences from other insects. The results provide a base and information frame for further research of the GST gene, and contribute to the related research of the insecticide resistance mechanism and development mechanism about Delia antiqua
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