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Articles by Qiang Ma
Total Records ( 3 ) for Qiang Ma
  Qiang Ma and Won-Sik Yoon
  In-network aggregation as a power-efficient mechanism for collecting data in wireless sensor networks has been emphasized with the development of other WSN network protocols. In this study, we firstly propose a general architecture to seamlessly integrate data aggregation into wireless sensor networks and then present one error correction algorithm for data aggregation by exploiting the inherent correlations that exist between sensor nodes. This approach is orthogonal to other works and thus can work complementally to enhance the reliability of aggregation algorithms.
  Fang-Xin Zhang , Zhi-Yun Deng , Ju-Zi Dong , Yun Duan , Shang-Xin Deng , Jia-Yu Chen , Qiang Ma and Ti-Dong Shan
  This study is aimed to investigate the effects of prebiotics on the expression of occludin and cytokines in the intestinal mucosal barrier of stressed rats in a high altitude environment. Forty-eight rats were acutely stressed in a high altitude hypoxia environment (3848 m). Rats in the hypoxia control group (n = 24) and prebiotics group (n = 24) were stressed for 2, 4 and 6 days before harvesting the intestinal mucosa. The expression of the occludin protein in the intestinal mucosa was analyzed by immunohistochemistry and tumor necrosis factor-α (TNF-α) and interleukin-10 (IL-10) expression were measured by the enzyme-linked immune sorbent assay in ileum tissue. The high altitude hypoxia environment significantly reduced occludin protein and mRNA expression in the control group, but prebiotics treatment elevated its expression on the 4th day and 6th day. Prebiotics treatment also significantly alleviated changes in TNF-α and IL-l0 induced by high altitude hypoxic stress. Prebiotics may help to maintain the integrity of epithelial cells by regulating expression of the occludin protein and cytokines.
  Chao Wang , Jianwu Zhao , Yan Wang , Nan Lou , Qiang Ma and Xingguang Su
  Stable, monodisperse CdTe quantum dots (QDs) capped with mercaptosuccinic acid were prepared facilely in aqueous medium, which were deposited on the quartz slides to form multilayer films by electrostatic interactions with poly(dimethyldiallyl ammonium chloride) (PDDA). The PDDA/QDs multilayer films are easily fabricated and show high photostability. The fluorescence of the multilayer films could be quenched effectively by Hg (II) ions without obvious shift in maximum photoluminescence emission wavelength, which can be used for the detection of Hg (II) ions. The electron transfer process between the capping ligands and Hg (II) ions should be mainly responsible for the remarkable quenching effect of Hg (II) ions. Under optimal conditions, the quenched fluorescence intensities of multilayer films are perfectly described by modified Stern–Volmer equation with the concentration of Hg (II) ions ranging from 0.01 μM to 1 μM.
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