In this paper, we propose a novel image denoising algorithm in Contourlet domain. The Contourlet transform is adopted by virtual of its advantages over the Wavelet transform in order to obtain a flexible multiresolution, local, and directional image expansion using contour segments, it is good at isolating the smoothness along the contours. We present a… (More)
OBJECTIVES To study mutations at positions A2058, A2503 and U2504 (Escherichia coli numbering) of 23S rRNA and their relationship to resistance to antibiotics that target the large ribosomal subunit. METHODS Single and dual mutations at positions 2058, 2503 and 2504 of 23S rRNA were introduced into a Mycobacterium smegmatis strain with a single functional… (More)
We observe Fano resonance in a single microresonator, in which two modes are excited simultaneously through a fiber taper. Our analysis reveals that the Fano resonance originates from an indirect-coupling of two originally orthogonal modes.
Many different types of toxins are produced by the fungus, Alternaria alternata (Fr.) Keissler. Little is known, however, regarding the influence of these toxins on insects. In this study, we investigated the toxin-induced inhibitory effects of the toxin produced by A. alternata on the rose aphid, Macrosiphum rosivorum, when the toxin was applied to leaves… (More)
Development of serum-free suspension cell culture processes is very important for influenza vaccine production. Previously, we developed a MDCK suspension cell line in a serum-free medium. In the present study, the growth kinetics of suspension MDCK cells and influenza virus production in the serum-free medium were investigated, in comparison with those of… (More)
Serum amyloid A (SAA), a major acute-phase reactant, modulates angiogenesis in many diseases. Vascular endothelial growth factor receptor 2 (VEGFR2) is the primary angiogenic receptor for vascular endothelial growth factor (VEGF), but the possibility of an interaction between SAA and VEGFR2 has not yet been resolved. Here, we investigated if SAA stimulates… (More)
We demonstrate the detection and sizing of single nanoparticles in aqueous environment by real-time monitoring the step changes in the nanofiber transmission.
We report single nanoparticle detection using mode splitting of the microcavity Raman lasers. Using this method, single polystyrene (PS) nanoparticle down to 20 nm in radius in an aqueous environment is realized.