Yukihiko Inoue

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We explored simple and useful spectral indices for estimating photosynthetic variables (radiation use efficiency and photosynthetic capacity) at a canopy scale based on seasonal measurements of hyperspectral reflectance, ecosystem CO2 flux, and plant and micrometeorological variables. An experimental study was conducted over the simple and homogenous(More)
Measurements of reflectance in visible and near-infrared spectral regions were made on detached leaves of two crop species of different leaf morphology, structure, and water content (peanut and wheat) throughout progressive desiccation. Relative water content (RWC) was well correlated with water index (WI) but even better with the ratio of WI and normalized(More)
Tropical canopy tree species can be classified into two types by their heterobaric and homobaric leaves. We studied the relation between both leaf types and their water use, together with the morphological characteristics of leaves and xylem, in 23 canopy species in a tropical rain forest. The maximum rates of photosynthesis and transpiration were(More)
An AOTF (Acousto-Optic Tunable Filter)-based spectral imager was developed for hyperspectral measurement of plant re ectance in the Ž eld. A hyperspectral image cube for the spectral region between 450–900 nm could be acquired at 3 to 5 nm resolution intervals within a few seconds. The system was light and compact, and both the spectral wavelengths and(More)
An anion exchanger consisting of amino-functionalized MCM-41 type mesoporous silica coated with temperature-responsive polymer, poly(N-isopropylacrylamide) (PNIPAM), was synthesized in this study. The structure of this composite was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM),(More)
Photosynthetic light response curves and reflectance spectra (380–2500 nm) were measured for soybean (Glycine max L. Merr.) leaves with a range of chlorophyll concentrations at various soil water contents. Regression lines for the relationship between the photosynthetic light use efficiency (LUEp) and photochemical reflectance index (PRI) under different(More)
The temperature-responsive anion exchanger was synthesized by immobilizing the poly(N-isopropylacrylamide) (PNIPAM), a kind of the temperature-responsive polymer, on the external surface of mesoporous silica via click reaction. The structure of this synthesized composite was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy(More)
The goal of the study was to apply and modify the semiemperical water-cloud model to simulate bacscattering coefficients of C-VV and L-HH as a function of LAI, vegetation water content and soil moisture. Bacscattering coefficients were compared to these obtained from ERS-2.SAR and JERS.SAR measurements taken simultaneously for the agriculture area in(More)
A BiFeO<sub>3</sub> film was fabricated by a chemical solution deposition (CSD) method onto the Pt/Ti/SiO<sub>2</sub>/Si(100) substrate followed by a post-deposition annealing at 973 K for 10 min in air. An X-ray diffraction measurement indicates the formation of the polycrystalline single phase of the BiFeO<sub>3</sub> film. The high remanent polarization(More)