Publications by authors named "Haohua Sun"

3 Publications

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X-ray tomography study of the random packing structure of ellipsoids.

Soft Matter 2014 Feb;10(7):990-6

We present an X-ray tomography study for the random packing of ellipsoids. The local structure displays short-range correlations. In addition to the contact number Z, we introduce ρshell, the average contact radius of curvature for contacting neighbors, as an additional parameter to characterize the local orientational geometry. In general, the local free volume w is affected by both Z and ρshell. We believe that the particle asphericity induces a polydispersity effect to influence the packing properties. A model is introduced which explicitly maps the ellipsoid packing onto a polydispersed sphere one, and it reproduces most of the experimental observations.
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http://dx.doi.org/10.1039/c3sm52841cDOI Listing
February 2014

X-ray grating interferometer for biomedical imaging applications at Shanghai Synchrotron Radiation Facility.

J Synchrotron Radiat 2012 Sep 12;19(Pt 5):821-6. Epub 2012 Jul 12.

School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.

An X-ray grating interferometer was installed at the BL13W beamline of Shanghai Synchrotron Radiation Facility (SSRF) for biomedical imaging applications. Compared with imaging results from conventional absorption-based micro-computed tomography, this set-up has shown much better soft tissue imaging capability. In particular, using the set-up, the carotid artery and the carotid vein in a formalin-fixed mouse can be visualized in situ without contrast agents, paving the way for future applications in cancer angiography studies. The overall results have demonstrated the broad prospects of the existing set-up for biomedical imaging applications at SSRF.
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http://dx.doi.org/10.1107/S0909049512029354DOI Listing
September 2012

Molecular characterization and evolutionary analysis of soybean mosaic virus infecting Pinellia ternata in China.

Virus Genes 2008 Feb 5;36(1):177-90. Epub 2007 Dec 5.

Institute of Bioengineering, Zhejiang Sci-Tech University, Road 2, Xiasha, Hangzhou, Zhejiang 310018, PR China.

Twenty-nine Pinellia ternata specimens were collected from representative areas in China, including the major production provinces of Zhejiang, Henan, Shanxi, Hunan, Shandong and Hubei. Seven isolates related to soybean mosaic virus (SMV), which could be pathogenic on P. ternata and some soybean [Glycine max (L.) Merr.] cultivars, were detected using double antibody sandwich immunosorbent assay (DAS-ELISA) and RT-PCR amplification performed with degenerate primer of potyviruses. It is revealed that the common potyvirus infecting P. ternata is, indeed, only SMVs rather than Dasheen mosaic virus (DsMV) as previously reported. Further molecular phylogenetic analysis of the coat protein (CP) genes of these SMV isolates from P. ternata and G. max, along with some other potyvirus members, such as DsMV and Watermelon mosaic virus (WMV) reconstructed the evolutionary route on both nucleotide and amino acid levels. Similarity and homology of nucleotide sequences for SMV CP genes demonstrated high host correlation and low partial habitat correlation, while those of amino acid sequences also showed that the host correlation was more notable than the habitat correlation. The amino acid sequence of conserved region within CP determines the main function, which shows high homology between species. This study outspreaded from the viruses themselves and their relationship to the infected hosts and revealed the evolutionary strategies, especially the rapid variation or recombination of SMV of P. ternata, in order to adapt itself naturally to the special host.
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http://dx.doi.org/10.1007/s11262-007-0167-zDOI Listing
February 2008