Q. Xu

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—This paper presents a complete design and development procedure of a new XY micromanipulator for two-dimensional (2-D) micromanipulation applications. The manipulator possesses both a nearly decoupled motion and a simple structure , which is featured with parallel-kinematic architecture, flexure hinge-based joints, and piezoelectric actuation. Based on(More)
  • Q. Xu, S.Y. Chen, L.D. Deng, L.P. Feng, L.Z. Huang, R.R. Yu
  • 2013
Excessive oxidative stress in pancreatic b cells, caused by glucose and fatty acids, is associated with the pathogenesis of type 2 diabetes. Mogrosides have shown antioxidant and antidiabetic activities in animal models of diabetes, but the underlying mechanisms remain unclear. This study evaluated the antioxidant effect of mogrosides on insulinoma cells(More)
Atom Probe Tomography (APT) analysis and hardness measurements were used to characterize the early stages of precipitation in an Al-0.51 at%Mg-0.94 at%Si alloy as reported in the accompanying Acta Materialia paper [1]. The changes in microstructure were investigated after single-stage or multi-stage heat treatments including natural ageing at 298 K (NA),(More)
In this paper, we present an efficient multiscale low-rank representation for image segmentation. Our method begins with partitioning the input images into a set of superpixels, followed by seeking the optimal superpixel-pair affinity matrix, both of which are performed at multiple scales of the input images. Since low-level superpixel features are usually(More)
Threonine dehydratase (EC, TDH) catalyzing the degradation of Thr to α-ketobutyrate, is a rate-limiting enzyme in L-Ile pathway. The tdcB gene encoding TDH was obtained from Escherichia coli K12 by PCR and expressed at E. coli BL21 (DE3). Then the tdcB gene was inserted into the shuttle expression vector pXMJ19 and the recombinant plasmid was(More)
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