7 results match your criteria: "Bussan Nanotech Research Institute[Affiliation]"
Anal Biochem
July 2007
Bussan Nanotech Research Institute Inc., Tsukuba, Ibaraki 305-0074, Japan.
Firefly luciferase is widely used for enzymatic measurement of ATP, and its gene is used as a reporter for gene expression experiments. From our mutant library, we selected novel mutations in Photinus pyralis luciferase with higher luminescence intensity. These included mutations at Ile423, Asp436, and Leu530.
View Article and Find Full Text PDFAppl Opt
September 2006
Bussan Nanotech Research Institute, Inc., Mitsui & Company, Tsukaba, Japan.
Chromatic dispersion of optical filters is characterized by what is believed to be novel broadband spectral interferometry, which is based on dual-wavelength heterodyne measurement of spectral phase. High phase stability is achieved by differential phase detection using two lasers for wavelength-swept probe and phase-tracking reference. The technique provides self-tracking interferometry by passive stabilization of optical phase and allows real-time measurement of spectral phase and group delay with a low phase drift of less than 0.
View Article and Find Full Text PDFAnal Sci
July 2006
Bussan Nanotech Research Institute Inc., Mitsui & Co. Ltd., Nanotech Park, 2-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan.
A zeolite NaA (LTA) membrane supported by an alumina porous support tube for pervaporation (PV) dehydration of ethanol was characterized by transmission electron microscopy (TEM) using a focused ion beam (FIB) thin-layer specimen preparation technique and by Fourier transform infrared attenuated total reflectance method (FTIR-ATR) using a diamond prism as the waveguide. FIB-TEM clearly presented cross-section images up to about 15 microm depth from the membrane surface. FTIR-ATR monitored the Si-O asymmetric stretching vibration spectrum.
View Article and Find Full Text PDFAnal Sci
July 2006
Bussan Nanotech Research Institute Inc., Mitsui & Co. Ltd., Nanotech Park, 2-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan.
Zeolite NaA-type membranes hydrothermally synthesized on porous alumina tubes, for dehydration process, were characterized by grazing incidence 2 theta scan X-ray diffraction analysis (GIXRD). The fine structure of the membrane was studied fractionally for surface layer and for materials embedded in the porous alumina tube. The thickness of the surface layer on the porous alumina tube in the membranes used in this study was approximately 2-3 microm as determined from transmission electron microscopy with focused ion beam thin-layer specimen preparation technique (FIB-TEM).
View Article and Find Full Text PDFAnal Sci
February 2006
Bussan Nanotech Research Institute, Inc., Mitsui & Co. Ltd., Nanotech Park, 2-1, Koyadai, Tsukuba, Ibaraki 305-0074, Japan.
For the dehydration process of biomass alcohol using a zeolite NaA (LTA) membrane supported by an alumina porous support tube, it is very important to understand damage of the surface crystal, which may be caused by acetic acid. Therefore, the surface structure and the chemical composition of the LTA membrane that reacted with water or acetic acid (pH 3-4) were investigated by the Fourier Transform Infrared Attenuated Total Reflectance method (FTIR-ATR), with a diamond prism as the waveguide, scanning electron microscope and an energy-dispersive X-ray analysis. For leaching experiments using water and acetic acid, ultrasonication was applied to promote the leaching rate and to surely prepare damaged membranes as a model experiment.
View Article and Find Full Text PDFAnal Sci
February 2006
Bussan Nanotech Research Institute, Inc., Mitsui & Co. Ltd. Nanotech Park, 2-1, Koyadai, Tsukuba, Ibaraki 305-0074, Japan.
A zeolite NaA (A-type zeolite of ca. 0.4 nm pore size; Linde Type A, LTA) membrane for the dehydration of alcohol was characterized by X-ray diffraction analysis (XRD).
View Article and Find Full Text PDFAnal Sci
March 2005
Bussan Nanotech Research Institute, Inc., Mitsui & Co. Ltd. Nanotech Park, 2-1, Koyadai, Tsukuba, Ibaraki 305-0074, Japan.
A zeolite NaA (LTA) membrane supported by an alumina porous support tube was characterized by Fourier Transform Infrared Attenuated Total Reflectance method (FTIR-ATR) with a diamond prism as the waveguide. A method using the FTIR-ATR was developed to estimate rapidly the EtOH/H2O pervaporation (PV) performance of the membrane. The Si-O asymmetric stretching vibration region of LTA membrane spectra synthesized hydrothermally on seeded alumina substrates showed a bimodal peak (830 - 1200 cm(-1)).
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